World of Ham Radio 1997/WOHR97_AmSoft_(1997-02-01).iso/usenets/1996_12/_antenna.txt

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The World of Ham Radio CD-ROM



From [e-mail] Wed Dec 11 19:33:30 1996
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From: [e-mail] (owl)
Newsgroups: rec.radio.amateur.antenna
Subject: ## INFO ON CDE PR44 NEEDED ##
Date: Fri, 06 Dec 1996 07:38:58 GMT
Organization: Magic Internet Services (Minot, ND)
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I am in need of information on a cde pr44 rotor and controller wiring.
this information has been lost and I am unable to use it. please
e-mail me if you have any info at
[e-mail]
or
[e-mail]

thanks in advance
-tom
kb0dsv



From [e-mail] Wed Dec 11 19:33:31 1996
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From: Edward Oros <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 10 meter antenna
Date: Mon, 02 Dec 1996 21:30:00 -0500
Organization: AT&T WorldNet Services
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[e-mail] wrote:
>
> Does anyone have any diagrams and/or design specs for 10 meter
> antenna's?  Wether they are on www, ftp, graphic file, etc...
>
> Let me know.
>
> Thanks,
> Scott, KF6FCN

Try...

http://www.qth.com/antenna


Ed---AC3L


From [e-mail] Wed Dec 11 19:33:32 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: 10 meter antenna
Date: Mon, 02 Dec 1996 21:52:01 GMT
Organization: N/A
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Does anyone have any diagrams and/or design specs for 10 meter
antenna's?  Wether they are on www, ftp, graphic file, etc...

Let me know.

Thanks,
Scott, KF6FCN



From [e-mail] Wed Dec 11 19:33:33 1996
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From: John M McClary <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 10 meter antenna
Date: Fri, 06 Dec 1996 13:43:19 -0800
Organization: Hiwassee CATV Contractors
Lines: 13
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References: <57vthl$[e-mail]>
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[e-mail] wrote:
>
> Does anyone have any diagrams and/or design specs for 10 meter
> antenna's?  Wether they are on www, ftp, graphic file, etc...
>
> Let me know.
>
> Thanks,
> Scott, KF6FCNJohn here, yes the ARRL Antenna Handbook is full of designs..My
 favorite
is the Cubical Quad.. Ive built 2, first was a 4 element job for 10 mtrs,
and the second is a 9 element 6 mtr and a 5 element 10 mtr on a common
boom with a length of 22 feet.Think Im going to try a long boom Yagi-Uda
type next..Hope this helps.. 73


From [e-mail] Wed Dec 11 19:33:34 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.dx
Subject: Re: 10M: Horizontal rotatable, or vertical?
Date: 4 Dec 1996 18:29:58 GMT
Organization: DigiPhone Corporation, Bryan/College Station Texas 409-693-8885
Lines: 61
Message-ID: <584fv6$[e-mail]>
References: <58329c$[e-mail]>
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Xref: news1.epix.net rec.radio.amateur.antenna:32367 rec.radio.amateur.dx:1487

In <58329c$[e-mail]>, [e-mail] (Jeffrey Herman) writes:
>I'm considering whether, for my Hawaii QTH, I should use a
>vertical dipole with its omnidirectional low take-off angle
>(it's what WWVH uses!), or a rotatable horizontal dipole
>with it's bidirectional pattern (the mast will be outside
>the window - I'll rotate it by hand). This is for 10m.
>
>By asking you folks I'll have someone to blame if the results
>are dismal.
>
>73 from the Central Pacific,
>Jeff KH2PZ

By the time you get up(down!) to the 10 meter band, it doesn't take much
to get to over a half wavelngth above the ground for a horizontal antenna.
As we get higher above that, the takeoff angle, of which you show awareness,
gets lower.  It also splits into multiple lobes.  If you are looking for conta
cts
which depend on skip propagation, optimal angles for that are lower on 10
meters than on, say 80 meters, perhaps 4-10 degrees or so, contrasted to
perhaps 12-24 degrees or so on 80.  Horizontal antennae depend less on
the presence of a good ground than do vertical antennae that are worked
against it for current return to the antenna..

If you are going to be looking for mostly vertically polarized signals that ar
e
not skip signals, like mobile units that are ground wave signals at your
location, horizontal antennae are not what you are after.  Vertical polarity
antennae that do not depend, for current return to the driven element, on
the presence of ground may be just the ticket for you.  We'll leave the nit
picking over efficiency of verticals 1/4, 1/2 ect., to the crew and just
between the two of us note that for antennae of less than a full wavelength
that can be fed in vertical mode as in *dipole*; four radials, properly
straight out or drooped to help you achieve a match, are enough, in practice,
to get you going just fine with a vertical for 10 meters.  The antenna will
likely be far enough above ground to work very well.  Literally millions of
these sort of things exist the world over in public service base station use.

You *can* achieve gain in vertical mode.  Study the 2 meter base station
antennae like the Ringo Ranger and so on.  Stacked dipoles in various
configurations of full size and shortened loop type dipole adaptations will
do the job, if the other station at the other end of the path is also vertical
.
Even on 10 meters, they aren't so big that you can't build them, nor are
vertically polarized yagi type beams wholely out of the question on 10 meters
either.

Chose whom you wish to target, DX or local.  If local, decide on whether
they will originate from horizontal or vertical antennae at the other end.
Make your choice of polarization accordingly.

Then,

      join the fun on how good you can get at making better and better
      antennae in whichever mode that pushes your signal further and
      further into better places...

           :)

//-----------------------------
Mike - W5WQN
[e-mail]
[e-mail]



From [e-mail] Wed Dec 11 19:33:35 1996
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From: [e-mail] (Jeffrey Herman)
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.dx
Subject: 10M: Horizontal rotatable, or vertical?
Date: 4 Dec 1996 05:30:20 GMT
Organization: University of Hawaii
Lines: 11
Message-ID: <58329c$[e-mail]>
NNTP-Posting-Host: uhunix3.its.hawaii.edu
Xref: news1.epix.net rec.radio.amateur.antenna:32368 rec.radio.amateur.dx:1488

I'm considering whether, for my Hawaii QTH, I should use a
vertical dipole with its omnidirectional low take-off angle
(it's what WWVH uses!), or a rotatable horizontal dipole
with it's bidirectional pattern (the mast will be outside
the window - I'll rotate it by hand). This is for 10m.

By asking you folks I'll have someone to blame if the results
are dismal.

73 from the Central Pacific,
Jeff KH2PZ


From [e-mail] Wed Dec 11 19:33:36 1996
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From: J&J Mac <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.dx
Subject: Re: 10M: Horizontal rotatable, or vertical?
Date: Thu, 05 Dec 1996 10:19:28 -0800
Organization: West Coast Online's News Server - Not responsible for content
Lines: 23
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To: Jeffrey Herman <[e-mail]>
Xref: news1.epix.net rec.radio.amateur.antenna:32413 rec.radio.amateur.dx:1502

Jeffrey Herman wrote:
>
> I'm considering whether, for my Hawaii QTH, I should use a
> vertical dipole with its omnidirectional low take-off angle
> (it's what WWVH uses!), or a rotatable horizontal dipole
> with it's bidirectional pattern (the mast will be outside
> the window - I'll rotate it by hand). This is for 10m.
>
> By asking you folks I'll have someone to blame if the results
> are dismal.
>
> 73 from the Central Pacific,
> Jeff KH2PZ

Hi Jeff,

First consider what modes you are going to use on 10M... If you plan on using
the SSB or CW portions,
Horizontal would be the method of choice. however, if you plan on working 10 F
M with the repeaters it's best to
use a vertical.

If you have the room for both why not! then you could simply switch between th
e two for the mode desired.

Jim..


From [e-mail] Wed Dec 11 19:33:37 1996
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From: "Roger D. Placer" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.dx
Subject: Re: 10M: Horizontal rotatable, or vertical?
Date: Thu, 05 Dec 1996 15:18:35 -0500
Organization: Lucent Technologies - Bell Labs
Lines: 36
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J&J Mac wrote:

> If you plan on using the SSB or CW portions,
> Horizontal would be the method of choice. however, if you plan on
> working 10 FM with the repeaters it's best to
> use a vertical.

Why on Earth would you tell him that?!? There are two issues here:
radiation angle and polarization.

Vertical polarization is definitely more appropriate if you're doing
repeater/FM (read: local) work, where the vast majority of antennas are
vertically polarized whips and parasitic arrays. However, I strongly
disagree with your "Horizontal would be the method of choice" for the
SSB and CW parts of 10m.

If you're interested in working DX on phone or CW, which presumably you
are or you'd be yakking on 80 instead of 10, you are more concerned with
skip and takeoff angles than polarization. If you are assuming that a
horizontally polarized antenna will somehow work better with all of the
beams and dipoles out there in DX-land, then here's a point to consider:
Your signal has to GET THERE first.

The bottom line is that either a horiz. dipole or a vertical will work
well; the differences probably won't be that profound. However, a
vertical will, if worked against a good groundplane, reward you with a
low takeoff angle (~15 degrees or thereabouts). This is a benefit to
long-distance skip propagation. A dipole tends to have a higher angle of
takeoff, though it too is certainly suitable for DX.

Anyway, my only reason for writing was to refute the rather definitively
stated "horizontal would be the method of choice" comment.

73 de KG2IV
Roger



From [e-mail] Wed Dec 11 19:33:38 1996
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From: [e-mail] (Jeffrey Herman)
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.dx
Subject: Re: 10M: Horizontal rotatable, or vertical?
Date: 8 Dec 1996 03:47:34 GMT
Organization: University of Hawaii
Lines: 25
Message-ID: <58ddom$[e-mail]>
References: <58329c$[e-mail]> <[e-mail]> <[e-mail]>
NNTP-Posting-Host: uhunix3.its.hawaii.edu
Xref: news1.epix.net rec.radio.amateur.antenna:32491 rec.radio.amateur.dx:1527

Roger D. Placer <[e-mail]> wrote:
>
>The bottom line is that either a horiz. dipole or a vertical will work
>well; the differences probably won't be that profound. However, a
>vertical will, if worked against a good groundplane, reward you with a
>low takeoff angle (~15 degrees or thereabouts). This is a benefit to
>long-distance skip propagation. A dipole tends to have a higher angle of
>takeoff, though it too is certainly suitable for DX.

You too lost track of my question! A vertical *dipole* is not worked against
a groundplane.

My original question regarded a rotatable horizontal dipole  vs a
vertical dipole (which WWVH uses extensively).

I'm tending towards the vertical dipole (or maybe even a 5/8 wave
vertical).

>Anyway, my only reason for writing was to refute the rather definitively
>stated "horizontal would be the method of choice" comment.

I agree, but for a different reason: The polarization gets skewed
during the ionospheric refraction.

Jeff KH2PZ / KH6


From [e-mail] Wed Dec 11 19:33:39 1996
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From: [e-mail] (Jeffrey Herman)
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.dx
Subject: Re: 10M: Horizontal rotatable, or vertical?
Date: 8 Dec 1996 03:55:20 GMT
Organization: University of Hawaii
Lines: 10
Message-ID: <58de78$[e-mail]>
References: <58329c$[e-mail]> <[e-mail]> <[e-mail]> <58cg43$[e-mail]>
NNTP-Posting-Host: uhunix3.its.hawaii.edu
Xref: news1.epix.net rec.radio.amateur.antenna:32492 rec.radio.amateur.dx:1528

In article <58cg43$[e-mail]>,  <[e-mail]> wrote:
>The questioner posed the question for a 10 meter model.  Thus "DX" for his
>model could include non-reflective paths.It also does include, I would guess,

>reflective paths.  That is why I answered him in the manner I did.

As I mentioned on the original query, I'm sitting in the Central Pacific
upon a tiny island. Any DX worked is via refraction.

73 from Hawaii,
Jeff KH2PZ / KH6


From [e-mail] Wed Dec 11 19:33:39 1996
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From: "Cecil A. Moore" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.dx
Subject: Re: 10M: Horizontal rotatable, or vertical?
Date: Sun, 08 Dec 1996 11:49:15 -0700
Organization: Delphi Internet Services Corporation
Lines: 15
Message-ID: <[e-mail]>
References: <58329c$[e-mail]> <[e-mail]> <[e-mail]> <58ddom$[e-mail]>
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Jeffrey Herman wrote:
> The polarization (of a horizontal dipole) gets skewed
> during the ionospheric refraction.

Hi Jeff, doesn't the same thing happen to a vertically
polarized signal in the ionosphere? Or are you saying
that low-angle radiation encounters the ionosphere less
than high-angle radiation? In that case, it has to do with
the TOA rather than the polarization.

I know very little about this subject. I've been told by
the big boys that the ionosphere has the same randomizing
effect on vertical and horizontal polarization.

73, Cecil, W6RCA, OOTC


From [e-mail] Wed Dec 11 19:33:40 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 160,80-75 meter antenna
Date: 3 Dec 1996 17:57:42 GMT
Organization: Houston Area League of PC Users
Lines: 28
Message-ID: <581pmm$[e-mail]>
References: <[e-mail]>
Reply-To: [e-mail]
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X-Newsreader: IBM NewsReader/2 2.0

In <[e-mail]>, n3tvv <n3tvv@ptdpro
log.net> writes:
>
>I`m limited to about 80` of horizontal space
>
>any suggestions for an antenna already constructed  for JUST these
>bands???
>
>some type of shortned inverted v would be preferred..
>
>
>thanx
>
>
>
>ERIC ,N3TVV([e-mail])
>
>
Eric,

I'm using Isotron's on 40 & 75. They also have one for 160. I have both of min
e mounted
on a 10' mast on the roof. They look like "bug catchers', about 2' high and 18
" round.

Bandwith is about 100 khz on 80; 40 I get just about the whole band.

Call for a catalog and favorable reviews from 73.
719-687-0650

Marv, W8KPI/5


From [e-mail] Wed Dec 11 19:33:41 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 160,80-75 meter antenna
Date: 4 Dec 1996 21:26:15 GMT
Organization: AOL http://www.aol.com
Lines: 8
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

I use an inverted vee with a set of 40 mtr and 80 mtr traps to get all
three bands. This of course limits the bandwidth on 160 but it works and
takes up little space.




73 Gary


From [e-mail] Wed Dec 11 19:33:42 1996
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From: [e-mail] (Barry Anderson)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 160,80-75 meter antenna
Date: Wed, 4 Dec 1996 18:08:34 -0500
Organization: Anderson Desktop Publishing
Lines: 18
Message-ID: <[e-mail]>
References: <[e-mail]>
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In article <[e-mail]>,
[e-mail] says...
>
> I`m limited to about 80` of horizontal space
>
> any suggestions for an antenna already constructed  for JUST these
> bands???
>
> some type of shortned inverted v would be preferred..
Eric ...

    How about a GAP Voyager antenna? It is vertical, works on 160, 80,
40, and 20. It is not a vertical ... actually a vertical dipole. I
understand it works great on 40 and 80, OK on 160 and lousy on 20.
--
Barry Anderson K3SUI
Frederick, MD. 21702
[e-mail]


From [e-mail] Wed Dec 11 19:33:43 1996
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From: scott <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 160,80-75 meter antenna
Date: Sat, 07 Dec 1996 18:54:23 -0800
Organization: Aero Head Aviation
Lines: 39
Message-ID: <[e-mail]>
References: <[e-mail]>
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To: n3tvv <[e-mail]>

n3tvv wrote:
>
> I`m limited to about 80` of horizontal space
>
> any suggestions for an antenna already constructed  for JUST these
> bands???
>
> some type of shortned inverted v would be preferred..
>
> thanx
>
> ERIC ,N3TVV([e-mail])
> a shortened dipole (80' length) can be built with loading coils in each
leg with the following dimensions:

each leg of dipole to be 40 feet, place coil 18 feet from feed point and
coil value to have an inductive reactance of 1500 ohms, thus
approximately 125 microhenries.  The coils can be approximated by winding
67 turns of #18 guage (insulated!) solid hookup wire on a 6 inch piece of
2 inch PVC pipe (outside diameter of 2.375 inches).  The coil will end up
being about 4 inches close-wound on the form so there is 1 inch of
uncovered core at each end for drilling attchment holes for the coil
windings and the antenna wires.  Tuning the antenna can be accomplished
by trimming or adding wire to the outboard side of the coil (opposite the
feed point end).  The tuning will be very sharp!! Also, the 2:1 SWR
points may only be 10KHz or less wide! I have a shortened dipole on 160M
that has a total lenght of 125' with the coils about 40 feet out from
feed point and adding one foot of wire to each end caused my antenna
resonance to shift from 2.000 to 1.894 MHz.  You will need to be careful
and take it in small steps.  One of those MFJ antenna analyzers would
work wonders!  73, good luck...Scott, N0EDV.

PS...this info can be obtained in the ARRL Antenna Book.  (Mine is the
1988 version).

--
Gotta FLY or gonna Die !
    Ask me about my
 Aeronca Super Chief !


From [e-mail] Wed Dec 11 19:33:46 1996
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From: [e-mail] (W T Shaw)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 17 Meter Antenna
Date: 8 Dec 1996 00:59:27 GMT
Organization: Another Netscape News Server User
Lines: 27
Message-ID: <wtshaw-0712962006380001@207.17.188.148>
References: <[e-mail]> <[e-mail]> <58c9cb$[e-mail]>
NNTP-Posting-Host: 207.17.188.148

In article <58c9cb$[e-mail]>, [e-mail] wrote:

> Maude Schyffert <[e-mail]> wrote:
>
> >Bruce Talkington wrote:
> >>
> >> I am thinking of building a 1/4 wave vertical for 17 meters and putting
> >> it on top of my house, the top of the house is about 19 foot from the
> >> ground. Then I thought that I would put the ground radials from the
> >> antenna over the roof. Was planning on building the antenna from 1 1/4
> >> inch thin wall metal pipe.
> >> Question is, has anyone tried something like this, and will the antenna
> >> work for dx on 17 meters? I know a beam would do better, but for now
> >> that is out of the question, so either a vertical, or a sloper is about
> >> my only option for this band.

You can put up what are called rabbit ears, an upside down inverted vee of
self-supporting limbs so the main support raises the whole antenna from
the bottom,

Or you could a standard inverted from a PVC pole. Run the coax inside the
pole and use the antenna as two of the guys.  You can cut the other two to
another band or maybe feed all four wires with one feed line.  Inverted
Vee's are always quieter than verticals, and easier to feed.
--
WTShaw--MacCrypto Programmer--The Following is in FUDGE
Vxdpq qcqva gdocd pokch hx-wd ll/,i ?-wry vegee n/wvm rt/tb bh/nd xdtlv ..mi.
fzngq hj,zf dzvrb uy/xq njdzc ?=uGo me/gg gu??g /?wen --ueo een-g -p,ym ohvfg
njrjb ,=/nl kk?zi ky.-m po,cg omufg koy.m kkmyi po,dg db,lb /,plz nn=mu d.awq


From [e-mail] Wed Dec 11 19:33:47 1996
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From: [e-mail] (Donald Milner)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 17 Meter Antenna
Date: Sat, 07 Dec 1996 15:24:28 GMT
Organization: The South African Internet Exchange.
Lines: 27
Message-ID: <58c9cb$[e-mail]>
References: <[e-mail]> <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: pta-dialin-23.smartnet.co.za
X-Newsreader: Forte Free Agent 1.0.82

Maude Schyffert <[e-mail]> wrote:

>Bruce Talkington wrote:
>>
>> I am thinking of building a 1/4 wave vertical for 17 meters and putting
>> it on top of my house, the top of the house is about 19 foot from the
>> ground. Then I thought that I would put the ground radials from the
>> antenna over the roof. Was planning on building the antenna from 1 1/4
>> inch thin wall metal pipe.
>> Question is, has anyone tried something like this, and will the antenna
>> work for dx on 17 meters? I know a beam would do better, but for now
>> that is out of the question, so either a vertical, or a sloper is about
>> my only option for this band.
>>
>> 73/Bruce..N4ZEZ
>> Andalusia, Alabama

>1/4 vertical for 17 meters is around 4.25 meters, the radials would be
>fine on the roof but the vertical element could be thinner.

>SM0BKZ
I have worked stations in the US  on 17M using a vertical without any
problem, I use a homebrew 6 el log periodic.  Most seem to use the R7
reports seem to good.  Good luck.
73 ... Don ... ZS6AQS
Pretoria, South Africa.



From [e-mail] Wed Dec 11 19:33:48 1996
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From: [e-mail] (Bryan)
Newsgroups: rec.radio.amateur.antenna
Subject: 2 M amp help
Date: Wed, 04 Dec 1996 21:12:27 GMT
Organization: Dimensional Communications
Lines: 15
Message-ID: <584svi$[e-mail]>
Reply-To: [e-mail]
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Hi,
I am having a problem with a rfc 2-23 amp that i
would welcome some input on.
I am using it with a kenwood th-22at and a mfj 2 meter
hansheld SWR meter and a ringo ranger 2m antenna.
The SWR at full power between the ht and the antenna
is about 1.5. When the amp is hooked up to
the radio the swr is slightly higher but still below
2.  But when I turn the amp on the reading goes off scale.
I was wondering if anyone could tell me want is going
on here and if this is a valid reading and how to correct it.

Thanks
[e-mail]



From [e-mail] Wed Dec 11 19:33:49 1996
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From: [e-mail] (Bea and Marvin Jones)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 2 M amp help
Date: 5 Dec 1996 14:27:53 GMT
Organization: Rocky Mountain Internet - (800) 900-RMII
Lines: 29
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References: <584svi$[e-mail]>
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Bryan ([e-mail]) wrote:
: Hi,
: I am having a problem with a rfc 2-23 amp that i
: would welcome some input on.
: I am using it with a kenwood th-22at and a mfj 2 meter
: hansheld SWR meter and a ringo ranger 2m antenna.
: The SWR at full power between the ht and the antenna
: is about 1.5. When the amp is hooked up to
: the radio the swr is slightly higher but still below
: 2.  But when I turn the amp on the reading goes off scale.
: I was wondering if anyone could tell me want is going
: on here and if this is a valid reading and how to correct it.

: [e-mail]

It could be you have rf flowing all over everything.  Try taking the
swr meter completely out of the line, but leave it positioned in the
same relative location.  Then drive the amp with your ht and see if
you get bogus swr readings.  Move the swr meter around and see if
that could be your problem.

73
Jonesy  W3DHJ
__
SK

--
[e-mail]
Gunnison, Colorado


From [e-mail] Wed Dec 11 19:33:50 1996
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From: Jim S <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 2 M amp help
Date: Thu, 05 Dec 1996 11:43:59 -0800
Organization: San Diego SuperComputer Center at UCSD
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References: <584svi$[e-mail]>
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Hi Bryan.... A couple of possibilities come to mind that I have
experienced in the past... The first relates to the amp.. If the
amplifier is unstable or is otherwise producing harmonics or other out of
band RF products, they will be reflected at the antenna... The
second has to do with the antenna system... If there are any
marginal connections (cold solder joints, crimped connectors,
oxidized joints, etc.) in the antenna system, they can become
exaggerated at higher powers.  Try the amp on another antenna system
to isolate the problem... Also, grounding problems can be exaggerated
at higher powers... Jim

Bryan wrote:

: Hi,
: I am having a problem with a rfc 2-23 amp that i
: would welcome some input on.
: I am using it with a kenwood th-22at and a mfj 2 meter
: hansheld SWR meter and a ringo ranger 2m antenna.
: The SWR at full power between the ht and the antenna
: is about 1.5. When the amp is hooked up to
: the radio the swr is slightly higher but still below
: 2.  But when I turn the amp on the reading goes off scale.
: I was wondering if anyone could tell me want is going
: on here and if this is a valid reading and how to correct it.


From [e-mail] Wed Dec 11 19:33:51 1996
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From: greg smith <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: 220meter
Date: Sun, 08 Dec 1996 20:43:07 -0800
Organization: SNUFFY
Lines: 3
Message-ID: <[e-mail]>
Reply-To: [e-mail]
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Looking to build a 220meter antenna directional. Any Idea where I can
get a schematic.........Thanks.....
                                   KD6IU


From [e-mail] Wed Dec 11 19:33:52 1996
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From: [e-mail] (Brian Mileshosky, N5ZGT)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 220meter
Date: Mon, 09 Dec 1996 23:12:40 GMT
Organization: Southwest Cyberport
Lines: 20
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greg smith <[e-mail]> wrote:

>Looking to build a 220meter antenna directional. Any Idea where I can
>get a schematic.........Thanks.....
>                                  KD6IU

220 Meters or 220 MHz?
73,
Brian, N5ZGT



 _________________________________________________________________________
   Boy Scouts of America                 Amateur Radio - N5ZGT
    Eagle Scout (12-6-96)         ARRL   QRP: NorCal# 1700   QRP-L# 580
     JASM - Troop 41           Author of Worldradio's "Youth Forum" Column
    Albuquerque, N.M.            Packet: N5ZGT @ KC5IZT.ALBQ.NM.USA.NA
  O.A. Lodge 66  <-W-W-W-<<             Internet: [e-mail]
 _________________________________________________________________________




From [e-mail] Wed Dec 11 19:33:53 1996
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From: [e-mail] (j)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 2m / 440 short length moderate gain antenna
Followup-To: rec.radio.amateur.antenna
Date: Tue, 03 Dec 96 04:13:56 GMT
Organization: SAPS
Lines: 24
Message-ID: <5809e4$[e-mail]>
References: <5778a4$[e-mail]> <57ve0b$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: jc009.socketis.net
Keywords: 2m 440 short moderate gain antenna
X-Newsreader: News Xpress 2.0 Beta #2

Has anyone heard anything, good or bad, about the Premier Communications
new PNC antenna series?  The base of this antenna type is supposed to
mount to either an NMO or UHF (pl-259/so-239?) mount.

I am more interested in the PNC-2, supposed to be 24" long, 200w capacity
(I only run 62 max), 2.15/3db gain, and has a little spring loaded section
near the base.

I am not planning on smacking anything, but whatever antenna I end up
with is going on top of the grand cherokee mentioned before.  More
likely to hit parking garage tops, etc. than branches, I fear :)

John.



 John Leveron  KB0YPK / Internet Email: [e-mail]
  PGP 2047 bit key; strong encryption for the average citizen!
  -----------  Use your vote or lose your rights!  -----------
   "The Second Amendment guarantees all of the others . . ."
pub 2047/4120C76D 1995/11/16 John M. Leveron {[JML2048]}
PGP Public Key fingerprint = A0 19 3E 2D E4 31 02 97
                             87 FB 62 DA 9F 94 24 77



From [e-mail] Wed Dec 11 19:33:54 1996
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From: [e-mail] (Robert J Jones)
Newsgroups: rec.radio.amateur.antenna
Subject: 2M Ant who is the best?
Date: Thu, 05 Dec 1996 11:49:55 -0500
Organization: ATL
Lines: 11
Message-ID: <rjones-0512961149550001@mac8100_6.atl.lmco.com>
NNTP-Posting-Host: 166.20.228.186

Hello
I am looking to put up a 2M ant for general use (Repeater and packet) I
had planed on using a isopole from AEA but i had just heard they went out
bussness.
Does anyone know of a better ant.? All opinions welcome.
boB
N3WDG

--
[e-mail]
N3DWG


From [e-mail] Wed Dec 11 19:33:55 1996
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From: [e-mail] (mark)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 2m/440 short length moderate gain?
Date: 2 Dec 1996 20:25:47 GMT
Organization: InternetMCI
Lines: 44
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References: <5778a4$[e-mail]>
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the thought of someone tearing up a good $30,000 grand cherokee just to put
an antenna on the roof makes me sick.  been an amature for years and will not
drill a hole in my car just to talk.

Do you have a tire carrier on the back?  Here is what I have done for my 93
full size bronco.  There is ample room for more than one antenna if you take
a piece of pipe and using u-clamps attach it to the tire carrier.  Drill out
a cap (I used 3/4" gas pipe and painted it) and attach the connector of your
choice.  Run the coax  (I used double shield 13Gauge center solid ethernet
that is about the size of RG-8) up through the center of the pipe to the
connector.  Get a good (diamond) dual band antenna and screw that in to the
connector.  You run the cable through your frame (this protects it from rocks
and other nasty things) to an existing entry point at your firewall.

This looks good and works great!!!

73s  mark


In article <5778a4$[e-mail]>, [e-mail]
says...
>
>Hi,
>
>    I'm looking for a relatively short (30" absolute max, but less preferred)

>antenna that will work on 2m/440.  Am planning on center mounting it on top
of
>a Grand Cherokee.
>
>    Any recommendations appreciated.  Thanks!
>
>73 de John.
>
>
>
> John Leveron  KB0YPK / Internet Email: [e-mail]
>  PGP 2047 bit key; strong encryption for the average citizen!
>  -----------  Use your vote or lose your rights!  -----------
>   "The Second Amendment guarantees all of the others . . ."
>pub 2047/4120C76D 1995/11/16 John M. Leveron {[JML2048]}
>PGP Public Key fingerprint = A0 19 3E 2D E4 31 02 97
>                             87 FB 62 DA 9F 94 24 77
>



From [e-mail] Wed Dec 11 19:33:59 1996
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From: [e-mail] (j)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 2m/440 short length moderate gain?
Date: Tue, 03 Dec 96 02:59:01 GMT
Organization: SAPS
Lines: 33
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References: <5778a4$[e-mail]> <57ve0b$[e-mail]>
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In article <57ve0b$[e-mail]>, [e-mail] (mark) wr
ote:

>>Hi,
>>
>>    I'm looking for a relatively short (30" absolute max, but less
>>preferred) antenna that will work on 2m/440.  Am planning on center
>>mounting it on top of a Grand Cherokee.
>>
>>    Any recommendations appreciated.  Thanks!

>the thought of someone tearing up a good $30,000 grand cherokee just to put
>an antenna on the roof makes me sick.  been an amature for years and will not
>drill a hole in my car just to talk.
(snipped for brevity)

Thanks Mark!  I am going to mount it on a quad magnet base that I adapted
for a PL-259 type connecter.  I have an SBB-15 for longer range simplex
contacts, but wanted something smaller for day to day use.

Appreciate all replies!

73 de John KB0YPK



 John Leveron  KB0YPK / Internet Email: [e-mail]
  PGP 2047 bit key; strong encryption for the average citizen!
  -----------  Use your vote or lose your rights!  -----------
   "The Second Amendment guarantees all of the others . . ."
pub 2047/4120C76D 1995/11/16 John M. Leveron {[JML2048]}
PGP Public Key fingerprint = A0 19 3E 2D E4 31 02 97
                             87 FB 62 DA 9F 94 24 77



From [e-mail] Wed Dec 11 19:34:00 1996
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From: Hal Rosser AE4YN <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 300 ohm feeder for vhf/uhf runs ???
Date: Wed, 04 Dec 1996 16:36:10 -0800
Organization: CSRA Internet Services
Lines: 14
Message-ID: <[e-mail]>
References: <57k3od$[e-mail]> <329f208d.1426238@news>
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Yes..use 300-ohm twinlead. I did and got 3db more signal in and out
vs rg58 on a 150 ft run to the antenna... and its cheaper... you can also
try using plain old lamp
cord.. i haven't checked it out YET,but expect the impedence to be about
 200 ohms or so; but use a balun on both ends.
  the TV baluns work at about 10 watts with no problem, but I would
suggest using a toroid balun. The 4:1 balun from 300 to 50 ohms still
leaves about 1.5:1 vswr..thats why I'm going to try the lamp cord.
  I'll advise after I try it. If you try it first, let us know how it
goes.
--
73'S de AE4YN
Hal
[e-mail]


From [e-mail] Wed Dec 11 19:34:00 1996
Newsgroups: rec.radio.amateur.antenna
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From: [e-mail] (Bart Rowlett)
Subject: Re: 300 ohm feeder for vhf/uhf runs ???
Organization: wb6hqk
Message-ID: <[e-mail]>
References: <57k3od$[e-mail]> <329f208d.1426238@news> <[e-mail]>
Date: Sun, 8 Dec 1996 04:42:49 GMT
Lines: 16

In article <[e-mail]>,
Hal Rosser AE4YN  <[e-mail]> wrote:
>Yes..use 300-ohm twinlead. I did and got 3db more signal in and out
>vs rg58 on a 150 ft run to the antenna... and its cheaper... you can also
>try using plain old lamp
>cord.. i haven't checked it out YET,but expect the impedence to be about
> 200 ohms or so; but use a balun on both ends.

Don't use lamp cord unless you test it first!  I've measured anywhere
between .5 and 6dB loss for a 35 foot piece at 7 MHz.  The impedance
seems to run around 100 ohms but the losses are highly dependant on the
exact formulation of the plastic insulation used.  Dielectric losses
increase with frequency and will render lamp cord useless at VHF.

bart   wb6hqk



From [e-mail] Wed Dec 11 19:34:01 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: 40 mtr KLM dipole
Date: 8 Dec 1996 01:13:46 GMT
Organization: aracnet.com -- Portland's loudest electrons
Lines: 5
Message-ID: <58d4oa$[e-mail]>
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Any one have a comment on the KLM 40 mtr rotateable dipole. Good bad Tell it l
ike it is.


73's
art


From [e-mail] Wed Dec 11 19:34:02 1996
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From: [e-mail] (ED WELCH)
Newsgroups: rec.radio.amateur.antenna
Subject: 40m Full-wave Loop Construction....
Message-ID: <[e-mail]>
Date: Mon, 02 Dec 96 22:04:00 -0600
Distribution: world
Organization: The Crenshaw County BBS/Luverne, AL/334-335-3968/ CHEAHA!!!
Reply-To: [e-mail] (ED WELCH)
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I'm a relative new ham (licensed back in July of this year.  Lately
have become interested in qrp.  Well, after contacting KB2WDU in
New Jersey using my Norcal 40a at about 2 watts and him kicking back
at me with his 4 watts I was inspired to do some antenna work for my
qrp rig.

I had been curious about putting up a loop for 40m so's me and my
trusty Zebco 33 and grape-sized lead weight headed to the "antenna
tree".  After eyeballing the old pecan tree I decided to configure the
antenna to be broadside to the west and east....hopefully to give me a
shot at the western fox-hunts and maybe some European/Asian/African DX.
Anyhow, I tested the wind, reared back, and cut loose with the lead.
First shot wasn't so hot, but the second shot went gracefully over and
around the tree, catching enough branches so that the final form would
be more or less cirucular.  After pulling the halyard back through the
branches, tying the insulated wire to it and pulling it back over the
limbs I had the basic structure pretty well completed.

Then came the matching section and tuning.  I used a piece of RG6 that,
from PL-259 to PL-259, is 28' long attached to RG-58.  The feedpoint is
situated at about the 07:30 position and is only about 8' from the ground.
The final form of the loop ended up being a flat-bottomed upside-down
shape with the "bottom being about 8' up off the ground.

Checking it with an MFJ259 analyser the novice band appears to have an
SWR of around 1.1:1 throughout it.  The resistance reading varies greatly
during a scan of the band.  Starting from 7.10mhz at 46 ohms the resistance
drops to 40 ohms at 7.15mhz.  If I tune the analyser down to 7.0mhz I get a
reading of 48 ohms but the SWR has jumped up to something like 1.25:1.
If I tune up to around 7.20mhz I get an SWR reading of 1.25:1, but the
resistance drops to 38-37 ohms.

Are these variation of resistance correct?  The 46 ohm resistance is close
to the target at 7.10mhz, but it could be better.  If I shorten the
matching section a tad will this bring the resistance up to the 50 ohm
mark?  If so, approximately how much would need trimming?  I tried moving
the feedpoint up several feet but the SWR seemed to get worse so I lowered
the feedpoint back down.

As it would have it, since I've strung the antenna up the BC QRM has been
terrible!....Nighttime is normally when I have a chance to get on the air.
Early this morning the antenna sounded great, several signals scattered
throughout the band.....all else was quiet...just as I've heard about loops.
Only bad thing was I had to go to work so I didn't get to try it out.
Band seems dead tonight, though shortly I'm going to crank up the TS450
just to be sure the Norcal is working ok....besides, since I built the Norcal
I haven't turned the Kenwood on, I guess I better see if *it* still works.<g>

Thanks for the bandwidth, any feedback is *more* than welcome!
72 es 73,
Ed Welch, KF4KRV , QRP-L #873
Crenshaw County - Grid EM61
Luverne, Alabama, USA


From [e-mail] Wed Dec 11 19:34:04 1996
Newsgroups: rec.radio.amateur.antenna
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From: Monty Wilson <[e-mail]>
Subject: Re: 40m Full-wave Loop Construction....
Message-ID: <[e-mail]>
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[e-mail] (ED WELCH) wrote:
>I'm a relative new ham (licensed back in July of this year.  Lately
>have become interested in qrp.  Well, after contacting KB2WDU in
>New Jersey using my Norcal 40a at about 2 watts and him kicking back
>at me with his 4 watts I was inspired to do some antenna work for my
>qrp rig.
>
>[details of antenna construction deleted]
>
>Checking it with an MFJ259 analyser the novice band appears to have an
>SWR of around 1.1:1 throughout it.  The resistance reading varies greatly
>during a scan of the band.  Starting from 7.10mhz at 46 ohms the resistance
>drops to 40 ohms at 7.15mhz.  If I tune the analyser down to 7.0mhz I get a
>reading of 48 ohms but the SWR has jumped up to something like 1.25:1.
>If I tune up to around 7.20mhz I get an SWR reading of 1.25:1, but the
>resistance drops to 38-37 ohms.
>
>Are these variation of resistance correct?  The 46 ohm resistance is close
>to the target at 7.10mhz, but it could be better....

How?  You're at 1.1:1 which is superwonderful, and from 7.0 to 7.2 you
get 1.25 or better which is great in itself.  Better bandwidth than that
you will not do.  I assume from the power levels you're running that you
will be doing CW-only; this means the match needs to be its best from 7.0
through 7.150, a range you've obviously hit very well.  If it's working,
don't fix it!  If you're worried about the few mw of reflected power, put
fresh batteries in that little thing to take you from 2w to 2.05w and
you'll be ahead of the game.

Good DX,

Monty N5NVM in Houston (where 100w IS qrp!)

--
.........Monty.
mwilson @ flex.net (with spaces deleted)




From [e-mail] Wed Dec 11 19:34:04 1996
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From: Costas Spanos <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 40m Full-wave Loop Construction....
Date: Tue, 03 Dec 1996 16:45:46 -0800
Organization: University of California, Berkeley
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To: Monty Wilson <[e-mail]>

Another relevant detail in all this is that the resistance reading
on the MFJ analyzer is only good at resonance (i.e. more or less when
you find the minimum SWR in your sweep). The MFJ tries to measure an
ohmic resistance, and of course, when the load is complex (which happens
on any other than the resonant frequency) the resistance reading is
nearly useless.

Good luck QRPing

Costas

KE6SYN (runnining 3watts on 40meters and loving it)


From [e-mail] Wed Dec 11 19:34:05 1996
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From: [e-mail] (Paul Erickson)
Newsgroups: rec.radio.amateur.antenna
Subject: 40mtr 2 element quad vs yagi?
Date: 5 Dec 1996 22:15:10 GMT
Organization: Simon Fraser University
Lines: 16
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Hi Everyone,

In the next year I may be in a position to put up a tower (70ft)
and I have a 4 element quad (30ft boom) in storage. For 40mtrs I'm
wondering if I should replace the outer spreaders to accomodate a 2 el
quad, or if I should be looking for a 2el yagi?

One of the advantages of modifing the quad is that I will then be able
to change it to include the warc bands, including 30mtrs.

Any suggestions would be appreciated.

cheers, Paul
VE7CQK
email: [e-mail]



From [e-mail] Wed Dec 11 19:34:08 1996
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From: [e-mail] (John Kaufmann)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 40mtr 2 element quad vs yagi?
Date: Fri, 06 Dec 96 14:24:04 GMT
Organization: M.I.T. Lincoln Laboratory
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[e-mail] (Paul Erickson) wrote:
>Hi Everyone,
>
>In the next year I may be in a position to put up a tower (70ft)
>and I have a 4 element quad (30ft boom) in storage. For 40mtrs I'm
>wondering if I should replace the outer spreaders to accomodate a 2 el
>quad, or if I should be looking for a 2el yagi?
>
>One of the advantages of modifing the quad is that I will then be able
>to change it to include the warc bands, including 30mtrs.
>
>Any suggestions would be appreciated.
>
>cheers, Paul
>VE7CQK
>email: [e-mail]
>


A properly tuned 2 element quad will provide more gain and better F/B than
a 2 element  yagi, provided you can get it up at a reasonable height (more
than half a wavelength).  Some years ago, I put up a fixed pointed 2 element
40 meter quad hung from a boom on top of a 120 foot tower.  I made it
electrically switchable so the pattern could be flipped between forward and
reverse directions.  The results were phenomenal.

A well constructed yagi, on the other hand, will probably be mechanically
stronger and more likely to  hold up in bad weather (I'm assuming you will
be using spreader construction for the quad).  Here in W1, ice loading in
the winter canl destroy a big quad--I've seen it happen to one 40 meter
quad using fiberglass spreaders and it was quite a mess.

GL & 73, W1FV

John Kaufmann
[e-mail]


From [e-mail] Wed Dec 11 19:34:09 1996
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From: ko4qc <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.equipment,rec.radio.amateur.misc
Subject: 5/8" UHF or 'N' connectors needed
Date: Mon, 09 Dec 1996 13:02:21 -0500
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Xref: news1.epix.net rec.radio.amateur.antenna:32543 rec.radio.amateur.equipment:43971 rec.radio.amateur.misc:120133

I have some 5/8" Times Fiber/Mirror 50ohm hard line.Model T10-50.I need
some connectors for this,preferably UHF but can make 'N' type work.If
you have any of these or can suggest a source please reply.
                                   Thanks,
                                   Joel(KO4QC)


From [e-mail] Wed Dec 11 19:34:10 1996
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From: [e-mail] (Tim Smith)
Newsgroups: rec.radio.amateur.antenna
Subject: 6 Meter Halo/Squalo help
Date: Tue, 10 Dec 96 11:55:44 GMT
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Does anyone know of plans available to build a 6 meter halo or squalo?

73,

Tim N1BTQ


From [e-mail] Wed Dec 11 19:34:11 1996
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From: "Christopher (Chris) W. Boone" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 6 Meter Halo/Squalo help
Date: Tue, 10 Dec 1996 08:08:45 -0800
Organization: ABC Radio Network Engineering - Dallas
Lines: 19
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Tim Smith wrote:
>
> Does anyone know of plans available to build a 6 meter halo or squalo?
>
> 73,
>
> Tim N1BTQ

Take a halfwave dipole, feed it at the center with a gamma match (dipole
is one straight section, not broken), bend it into a circle or square and
you have a halo/squalo....
(you may have to play with the ends to adjust for coupling or add disks
at the ends for capactive adjustment)

Easy?

73
Chris
WB5ITT


From [e-mail] Wed Dec 11 19:34:11 1996
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From: n3tvv <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: 6 meter ssb rigs
Date: 10 Dec 1996 06:33:40 GMT
Organization: ProLog - PenTeleData, Inc.
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anyone have a 6 meter ssb rig to sell??????????

at a DECENT  price!!!!!



ERIC ,N3TVV([e-mail])




From [e-mail] Wed Dec 11 19:34:12 1996
Path: news1.epix.net!news3.epix.net!uunet!in2.uu.net!206.149.24.18!excalibur.flash.net!not-for-mail
From: "Wendell - W5FL" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: 60 foot vertical
Date: 5 Dec 1996 17:26:01 GMT
Organization: Wyly Enterprises
Lines: 40
Message-ID: <01bbe2d1$4fe26560$[e-mail]>
NNTP-Posting-Host: pm10-63.flash.net
X-Newsreader: Microsoft Internet News 4.70.1155

I am planning to build a 60 foot vertical antenna for 40/80/160 and
possibly 30 meters.

I have a metal barn that is 50x90 feet(which should completely eliminate
any radials) and is 16 feet high on the metal room.  I plan to put it in
the center and insulate it.

Has anyone done this before and has an idea about the size of aluminum
tubing necessary to survive 100 mph gusts in Texas thunderstorms?

I guess there are two ways to go about this.  One is to experiment with
loading until you get it right and the other is to model the vertical and
calculate at least a strarting point.  Has anyone modeled a vertical like
this before and would be willing to share their input file, etc?  Has
anyone built a similar vertical and would provide the details?

160 mtr   will require a loading coil with fairly high q and wire size.
80 mtr should be a 1/4 wave and feed directly with 50 ohm coax
40 mtr should be a 1/2 wave and will require a tuned circuit and tap
arrangement to get 50 ohm feed and I have no idea how to do this.
30 mtr may be able to feed as a 5/8 wave and will also require a tuned
circuit and tap      arrangement similar to the 40 mtr.

The power level will be 1500 Watts PEP or cw.
What is the best way to guy it so that maintenance is low.

Plan to have a relay switchbox at base to select the band and then coax
feed it through lightning arrestor or some kind.

I have also considered putting up 2 of these on the 50x90 metal barn but I
don't know what spacing would be optimum for a multi-band vertical.

This qth is the highest point for about 100 square miles.  Do you think it
will ever get hit by lightning?  The surrounding terrain slopes down at
about a 2 degree slope for a mile or so.

I have never been able to model a vertical on sloping terrain, but would
appreciate any input from those who may have done it.
--
Wendell Wyly - W5FL          [e-mail]


From [e-mail] Wed Dec 11 19:34:13 1996
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From: [e-mail] (Jim Kusznir)
Newsgroups: rec.radio.amateur.antenna
Subject: 6M Antenna Plans Wanted
Date: Sun, 1 Dec 1996 19:46:43 -0800
Organization: RidgeNET
Lines: 14
Message-ID: <57tjhh$[e-mail]>
NNTP-Posting-Host: lo-pan.ridgecrest.ca.us
X-Newsreader: MacSOUP 2.2b3

Hello all:

I recently got my Motorola Motran Lo-band radio working and I am looking
for designs for 6M antennas (roof-mount).  I remember seeing a reference
to a home page on this group a year or two ago, but I can't find the
information any more.

Thank you in advance.

--
73 de Jim Kusznir, KE6DWM

[e-mail] (Primary Internet)
ke6dwm@wa6ybn.#soca.ca.usa.noam (Ametuar Radio Packet System only)


From [e-mail] Wed Dec 11 19:34:14 1996
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From: Gavin Stirling <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 6M Antenna Plans Wanted
Date: Mon, 2 Dec 1996 22:25:19 GMT
Lines: 32
Message-ID: <[e-mail]>
NNTP-Posting-Host: besses.zetnet.co.uk
X-Mailer: ZIMACS Version 1.09x 10002280

Jim,

You could try the UK Six Metre Group Web site.

http://www.uksmg.org

regards,
Gav
GM0WDD


In message <57tjhh$[e-mail]>
        [e-mail] (Jim Kusznir) writes:

> Hello all:

> I recently got my Motorola Motran Lo-band radio working and I am looking
> for designs for 6M antennas (roof-mount).  I remember seeing a reference
> to a home page on this group a year or two ago, but I can't find the
> information any more.

> Thank you in advance.

> --
> 73 de Jim Kusznir, KE6DWM

> [e-mail] (Primary Internet)
> ke6dwm@wa6ybn.#soca.ca.usa.noam (Ametuar Radio Packet System only)






From [e-mail] Wed Dec 11 19:34:15 1996
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From: John Mcleod <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: 6m Halo Antenna
Date: Fri, 06 Dec 1996 13:47:50 -0800
Organization: Pacific Internet
Lines: 9
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Does anyone know of any practical designs that are available for such
an
antenna ?  (I've seen the ones in Ken Neubeck's book). Also, any user
impressions ?
At present, I use a 6m hamstick on my mobile.

Thanks !

John Mcleod N6RCD


From [e-mail] Wed Dec 11 19:34:16 1996
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From: Bart Dolega <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: 80m DELTA or 20m DELTA ?
Date: Mon, 09 Dec 1996 22:37:59 -0600
Organization: :-)
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DELTA-LOOP for 80m or DELTA-LOOP for 20m ?
Which one would be better :-> I will TX on 14.200 :->
Vy 73! de Bart


From [e-mail] Wed Dec 11 19:34:17 1996
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From: [e-mail] (Dave Schertzer)
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.misc
Subject: 900mhz + Dummy load?
Date: 10 Dec 1996 21:35:15 GMT
Organization: WhidbeyNet
Lines: 11
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Xref: news1.epix.net rec.radio.amateur.antenna:32589 rec.radio.amateur.misc:120256

Have a Motorola Moster mobile 800/900mhz rig but, No ant?
Will a normal "dummy load" work to test them fer TX/RX?
Has a connection fer a PL259 on the back.
Or, does anyone have a CHEAP ant  ($5.00)
Plse any info reguarding this subj.    dave

Oak Harbor,WA
98277
[e-mail]
de VE7-LFA/W7



From [e-mail] Wed Dec 11 19:34:17 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 900mhz + Dummy load?
Date: 11 Dec 1996 01:40:12 GMT
Organization: AOL http://www.aol.com
Lines: 9
Message-ID: <[e-mail]>
References: <58kl2j$[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
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Hi Dave--

I doubt a "HF" type dummy load will work all--you wouldn't believe how bad
PL258/ SO239 type hardware looks on a network analyzer at 900 MHz.  If you
really need a cheapo dummy load, why not take a long length of RG58 and
use the cable's line loss as a load?  Terminate about 100' of it with a
junky 50-ohm load, and you should be all set.

Rick  K1BQT


From [e-mail] Wed Dec 11 19:34:18 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 900mhz + Dummy load?
Date: 11 Dec 1996 00:28:20 GMT
Organization: AOL http://www.aol.com
Lines: 13
Message-ID: <[e-mail]>
References: <58kl2j$[e-mail]>
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X-Admin: [e-mail]

A PL259? Yow! That thing (connector) will act like half your antenna!

Seriously though; why don't you just run a piece of coax out and attach a
3(and 1/2) inch paper clip--straightened-- to the center conductor? Better
yet, buy some thick copper wire and try. Unless you use hardline  and
choke,  coax  will radiate anyway, so you might as well use it as a
counterpoise. You'll probably get a 10 % BW.

Don't think I've seen a 900 MHz xcvr with SO239..a new one on me! (But I'm
not that old).

Cheers
Chip N1IR


From [e-mail] Wed Dec 11 19:34:19 1996
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From: "Cecil A. Moore" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: [Q] Lenght of the reflector in the Y-U ?
Date: Mon, 02 Dec 1996 23:35:45 -0700
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Ian White, G3SEK wrote:
> But an array of elements does not have a "resonant frequency"

Dang Ian, if that's true, I'm totally confused. I was assuming the
frequency at which an array of elements produces a purely resistive
impedance *is* the resonant frequency of the array. All the plots of
SWR for a Yagi show a center frequency at which the reactance is zero.
I have always assumed that was the resonant frequency of the Yagi.
Have I been wrong for 44 years?

73, Cecil, W6RCA, OOTC


From [e-mail] Wed Dec 11 19:34:20 1996
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From: "Ian White, G3SEK" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: [Q] Lenght of the reflector in the Y-U ?
Date: Tue, 3 Dec 1996 13:52:59 +0000
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Cecil A. Moore wrote:
>Ian White, G3SEK wrote:
>> But an array of elements does not have a "resonant frequency"
>
>Dang Ian, if that's true, I'm totally confused. I was assuming the
>frequency at which an array of elements produces a purely resistive
>impedance *is* the resonant frequency of the array.

No, it doesn't have to be.

>All the plots of
>SWR for a Yagi show a center frequency at which the reactance is zero.
>I have always assumed that was the resonant frequency of the Yagi.

That's the center of the VSWR curve, which relates only to the
feedpoint. By adjusting a matching network between the driven element
and the feedline, you can center the VSWR curve wherever you like. The
gain and F/B performance will not change at all because you haven't
changed the elements.

All yagis have a gain peak which lies somewhere HF of the frequency of
best F/B, and the obvious practical place to center the VSWR curve is
between those two frequencies. But they don't >have< to coincide.

We tend to believe that the yagi "works best" at the frequency of lowest
VSWR, but that's only because the mismatch loss dominates all the other
frequency-dependent terms.

Yagis modeled on the computer show these effects very clearly, because
the program calculates 'real' gain and pattern performance, without the
effects of changing feedpoint impedances. Run a few examples through
ELNEC or AO and you'll see what I mean. When YO does yagi optimization,
it doesn't bother to change the length of the driven element at all,
because it knows that any VSWR problems can be fixed later.

Maybe it's clearer with very long yagis than with short ones. If you
build a 20-element yagi for the low end of the band, but the VSWR dips
at the high end, it's easy to see that the 19 parasitic elements are
actually OK and only the driven element needs attention.


73 from Ian G3SEK          Editor, 'The VHF/UHF DX Book'
                          'In Practice' columnist for RadCom (RSGB)
Professionally:
IFW Technical Services     Clear technical English - world-wide.


From [e-mail] Wed Dec 11 19:34:22 1996
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From: Karim Fahmy <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: A good type of Antenna which is good enough to receive Stations fromMiddle East ...
Date: Tue, 10 Dec 1996 15:08:09 -0600
Organization: Mankato State University
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Hey there
        I am Student in Mankato State University , an International
Student .. It's Located in Minnesota, US ... I orginally come from Egypt ..
I have a DX-375 Radio Sortwave Receiver .. My question is that I need
an antenna which can receive stations from the US, England or Europe and
in the Middle East .. I live in a Building 12 floors which probably
contains metal interferance ...I have 23 ft copper wire which is designed
to be used in receiving ShortWave Stations .. So what will I need to get a
frequency with a fine clear voice which can be heard ..

Looking forward for you message ...
Thanks for your Help ...




From [e-mail] Wed Dec 11 19:34:24 1996
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From: [e-mail] (cRiTTa66)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: A good type of Antenna which is good enough to receive Stations fromMiddle East ...
Date: Wed, 11 Dec 1996 00:21:45 GMT
Organization: iNdependent
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simmple, just take that wire and hang it up somewhere, at the end of
the wire attach the wire to the sHortwave thingy
On Tue, 10 Dec 1996 15:08:09 -0600, Karim Fahmy
<[e-mail]> wrote:

>Hey there
>        I am Student in Mankato State University , an International
>Student .. It's Located in Minnesota, US ... I orginally come from Egypt ..
>I have a DX-375 Radio Sortwave Receiver .. My question is that I need
>an antenna which can receive stations from the US, England or Europe and
>in the Middle East .. I live in a Building 12 floors which probably
>contains metal interferance ...I have 23 ft copper wire which is designed
>to be used in receiving ShortWave Stations .. So what will I need to get a
>frequency with a fine clear voice which can be heard ..
>
>Looking forward for you message ...
>Thanks for your Help ...
>
>



From [e-mail] Wed Dec 11 19:34:25 1996
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From: antalick <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: AILTECH equipment notice
Date: Fri, 06 Dec 1996 08:19:50 -0800
Organization: CRIBX1 , Universite de Bordeaux I , France
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Bonjour from Bordeaux France.
To repare an AILTECH Synthesized Signal Generator reference 380KII,
I am looking for either a mauual or a copy (schematics) , for the main
frame (Power supply
problem).
I have the manual for the plug in, ref  P3602 OE1 183, but I also need
the manual for the fm
modulator option.
Many thanks if you can help me.
Roland, F6ANF.


From [e-mail] Wed Dec 11 19:34:26 1996
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From: [e-mail] (bob puharic)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Alinco 2M rigs ???
Date: Sun, 08 Dec 1996 08:18:58 GMT
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[e-mail] (JEFF) wrote:

>I am intersted in buying a 2mtr. or possibly a dual bander soon.
>Can any of out there please tell me if you have had any
>experience with Alinco radios.

ive got 2 of 'em...both 112t's. i use one for my 2m packet station. i
live at the top of a hill and my station is used quite a bit as a
digipeater. the alinco has been on the air 24 hrs/day for 4 years,
other than the fact that the dial lights burn out easily, has had zero
problems...absolutely not a single one.

the other is in my car...bounces around...takes a lickin and keeps on
tickin.



From [e-mail] Wed Dec 11 19:34:27 1996
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From: [e-mail] (JEFF)
Newsgroups: rec.radio.amateur.antenna
Subject: Alinco 2M rigs ???
Date: Sat, 07 Dec 1996 21:05:33 GMT
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I am intersted in buying a 2mtr. or possibly a dual bander soon.
Can any of out there please tell me if you have had any
experience with Alinco radios. Good or bad. I am thinking of
perhaps the DR-605 dual band or just the DR-150 T.
I have been on HF for a long time now and this will be my
first experience with 2M/440 . What is the simplex range of
440 mhz. ?

                           THANKS !           Jeff    VE7-GMX


( e-mail if possible , pls. )     TNX


From [e-mail] Wed Dec 11 19:34:28 1996
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From: [e-mail] (Doug D)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Alinco 2M rigs ???
Date: Sun, 08 Dec 1996 04:39:08 GMT
Organization: Doug's Personal Defense Products
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I have an Alinco DR-150T Mobile. I enjoy it very much; it
has been problem-free.

Doug

[e-mail] (bob puharic) wrote:

>[e-mail] (JEFF) wrote:
>
>>I am intersted in buying a 2mtr. or possibly a dual bander soon.
>>Can any of out there please tell me if you have had any
>>experience with Alinco radios.
>
>ive got 2 of 'em...both 112t's. i use one for my 2m packet station. i
>live at the top of a hill and my station is used quite a bit as a
>digipeater. the alinco has been on the air 24 hrs/day for 4 years,
>other than the fact that the dial lights burn out easily, has had zero
>problems...absolutely not a single one.
>
>the other is in my car...bounces around...takes a lickin and keeps on
>tickin.
>

--
Sandusky CB Club
http://user.aol.com/ralph234/cb-page/cbclub.htm


From [e-mail] Wed Dec 11 19:34:29 1996
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From: J&J Mac <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Alinco 2M rigs ???
Date: Sun, 08 Dec 1996 10:34:40 -0800
Organization: West Coast Online's News Server - Not responsible for content
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To: JEFF <[e-mail]>

JEFF wrote:
>
> I am intersted in buying a 2mtr. or possibly a dual bander soon.
> Can any of out there please tell me if you have had any
> experience with Alinco radios. Good or bad. I am thinking of
> perhaps the DR-605 dual band or just the DR-150 T.
> I have been on HF for a long time now and this will be my
> first experience with 2M/440 . What is the simplex range of
> 440 mhz. ?
>
>                            THANKS !           Jeff    VE7-GMX
>
> ( e-mail if possible , pls. )     TNX

Not that I favor Alinco, they are _to me_ about the same as any of the others.

I do have the Alinco DR-430 UHF rig and I like it!.

but I have Icom, Kenwood, Tempo, Drake and have had Yaesu and I like(d) them a
ll.

Jim..


From [e-mail] Wed Dec 11 19:34:30 1996
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From: [e-mail] (Brian Williams)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Alinco 2M rigs ???
Date: 8 Dec 1996 17:52:36 GMT
Organization: UCI Medical Center
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In article <[e-mail]>, [e-mail]
says...
>I am intersted in buying a 2mtr. or possibly a dual bander soon.
>Can any of out there please tell me if you have had any
>experience with Alinco radios. Good or bad.

I have had three mobile Alinco radios in the past eight years.  The first
was a DR-110 2meter.  I liked the radio.  Very easy to program and use.  It
caused me to buy another Alinco radio when I decided to by a dual band
2m/440 radio, so I sold the DR-110 and purchased a DR-590 (predecessor to
the DR-599, DR-600, DR-610, and DR-605.  This radio was stolen from my truck
when my truck was stolen and I replaced it with another used DR-590.  The
only real complaint that I have with the dual-banders was that they used a
lighting system on the control panel that would usually go out in a few
years.  They placed two parallel sets of two lamps in series into the LCD
display and if one of the two lamps goes out, then that section of the
display is dim.  If both sets have one lamp go out, then it's almost
impossible to see the display at night.  The lamps are less than $10.00 for
a set of four if my memory serves me correctly, and Alinco stocks them at
the Southern California location.  Putting the new bulbs in wasn't too
difficult, but is probably not wise for someone to attempt without some
prior soldering experience.  Only using the display lamps at the low
intensity setting (still plenty of light even at dawn or dusk and of course
bright at night) will increase lamp life a lot.  The high intensity setting
is just about too bright for me anyway.

The only other failure on my DR-590 was a coax cable that got pulled out
from the back of the radio.  Needed a 100 watt soldering iron to get the old
one out and the new one in, but it works great and again, parts are
available from Alinco.

I'd buy another Alinco anytime.

Brian

>What is the simplex range of 440 mhz. ?
>
>                           THANKS !           Jeff    VE7-GMX

I'll base this answer on a comparison instead of an actual figure because it
varies on terrain, buildings, elevation, etc.  Compared to 2meters, the
range is very comparable.  Typical antenna gains are higher (assuming a
dual-band antenna) and make up for higher atmospheric losses.  440Mhz has
more trouble going around objects (small hills, buildings) but tends to go
through certain buildings a bit better.   Bottom line it that it is a bit
different on 440 (and more line-of-sight than 2meters) but in actual use,
tends to be fairly close.

Good Luck,
Brian



From [e-mail] Wed Dec 11 19:34:31 1996
Newsgroups: rec.radio.amateur.antenna
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!netcom.com!charles1
From: [e-mail] (charles copeland)
Subject: Re: Alinco 2M rigs ???
Message-ID: <[e-mail]>
Organization: NETCOM On-line Communication Services (408 261-4700 guest)
References: <[e-mail]> <58ev94$[e-mail]>
Date: Sun, 8 Dec 1996 23:09:36 GMT
Lines: 12
Sender: [e-mail]

In article <58ev94$[e-mail]>,
Brian Williams <[e-mail]> wrote:
>In article <[e-mail]>, [e-mail]
>says...
>>I am intersted in buying a 2mtr. or possibly a dual bander soon.
>>Can any of out there please tell me if you have had any
>>experience with Alinco radios. Good or bad.
>

I have heard (read in reviews) that Alinco mobile radios
run HOT. To hot for comfort. Cheap heat sink is inadequate.



From [e-mail] Wed Dec 11 19:34:32 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!svr1.pdx.gstis.net!nuhou.aloha.net!news-w.ans.net!newsfeeds.ans.net!news.lava.net!news.Hawaii.Edu!munnari.OZ.AU!spool.mu.edu!usenet.eel.ufl.edu!freenet2.afn.org!afn17891
From: "Thomas W. Castle" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: ALL NIGGERS SHOULD DIE
Date: Wed, 4 Dec 1996 02:01:28 -0500
Lines: 29
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]> <[e-mail]> <[e-mail]>
Reply-To: "Thomas W. Castle" <[e-mail]>
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To: Lavel McCray <[e-mail]>
cc: Mike <[e-mail]>
In-Reply-To: <[e-mail]>

On Sat, 30 Nov 1996, Lavel McCray wrote:

> Mike wrote:
> >
> > Noel Gunn wrote:
> > >
> > > Donny wrote:
> > > >
> > > > FUCK ALL YOU NIGGERS!!  I HATE OJ SIMPSON WORST OF ALL!  HE IS LIKE AL
L
> > > > THE REST OF YOU NIGGERS WHO GO AROUND FUCKING AND BEATING WHITE WOMEN
AND
> > > > THEN KILLING THEM AND GETTING AWAY WITH IT BECAUSE THEY PLAY THE RACE
> > > > CARD!!  AND FUCK ALL YOU NIGGERS WHO DONT LIKE ME!  IF I HAD MY WAY TH
E
> > > > WORLD WOULD BE UNDER NAZI RULE AND FUCK YOU RACE TRAITORS I HOPE YOU A
LL
> > > > DIE!!!  I LIKE TO GO AND PULL NIGGERS OVER FOR SPEEDING AND THNE BEAT
THE
> > > > SHIT OUT OF THEM!!!  AND CUT THEIR BALLS OFF!!!
> > > >
> > > > WHITE POWER RULES!!!!!
> >
> >  WHAT A DORK !!!!!!!!
> Hi,
> What the fuck are you talking about.  OJ maybe he killed that white
> woman but he did white you white punks have been doing all along.  USING
> THE LAW TO COVER UP YOUR SHIT.

Nigs should stick to killing Nigs....






From [e-mail] Wed Dec 11 19:34:33 1996
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From: [e-mail] (Tim Smith)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Antenna in attic?
Date: Tue, 10 Dec 96 22:01:44 GMT
Organization: From the home front
Lines: 33
Message-ID: <58kpkg$[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: n1btq.tiac.net
X-Newsreader: News Xpress Version 1.0 Beta #4

In article <[e-mail]>,
   "Gary T. Craze" <[e-mail]> wrote:
>The subdivision that I moved into does not allow outside antennas of any
>kind.   I do have quite a bit of room in the attic, which is above the
>second story of my house.  The roof pitch is quite steep, and thus I
>have about 12 feet from the "floor"  of the attic to the peek of the
>roof.  I have an older ICOM IC-3200A 25W 2M/440 mobile unit that has
>been used as a base station in the past, but I'm not sure about the
>performance of an inside antenna.   The roof has standard composite
>shingles over plywood, and the base of the antenna would be about 20
>feet above the ground (the height of the floor in the attic).  I'm
>looking at some of the dual band antennas like the Diamond X-200A or the
>Cushcraft dual band Ringos.

I have a similar situation here.  I live in a small beach cottage near Cape
Cod.  My problem is not zoning or neighbors but lack of space.  With a very
small lot and not trees to speak of I opted for the attic approach.  I have
suspended from the rafters a small piece of mast and "upside down" mounted a
rotor with a 7 element 2 meter yagi (horizontally polorized) with fairly god
success.  I have also strung a 20 meter dipole, a 2 meter J pole (vertically),

a multi-band scanner antenna, a 6 meter dipole and a small dipole cut for FM
broadcast.  I'm sure outside antennas have alot more advantage but for my own
personal satisfaction they perform nicely.  I can hit all the local 2 meter
repeaters, have worked a fair amount of stations on 2, 6 and 20 meters and
listen to my scanner whenever when I'm near it.  I use a low power FM
broadcast transmitter fed to a dipole to pipe audio from the shack to the yard

when I want to listen while doing yard work or work on the car.  Lot's of
luck...it can be done with pretty good results.

73,

Tim Smith
N1BTQ


From [e-mail] Wed Dec 11 19:34:34 1996
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From: Joe <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Antenna in attic?
Date: Wed, 11 Dec 1996 15:28:55 -0800
Organization: Hi from Taipei TAIWAN !!!
Lines: 39
Message-ID: <[e-mail]>
References: <[e-mail]>
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To: [e-mail]

Gary T. Craze wrote:
> The subdivision that I moved into does not allow outside antennas of any
> kind.   I do have quite a bit of room in the attic, which is above the
> second story of my house.  The roof pitch is quite steep, and thus I
> have about 12 feet from the "floor"  of the attic to the peek of the
> roof.  I have an older ICOM IC-3200A 25W 2M/440 mobile unit that has
> been used as a base station in the past, but I'm not sure about the
> performance of an inside antenna.   The roof has standard composite
> shingles over plywood, and the base of the antenna would be about 20
> feet above the ground (the height of the floor in the attic).  I'm
> looking at some of the dual band antennas like the Diamond X-200A or the
> Cushcraft dual band Ringos.
> Any suggestions?

I did this for several years, both on HF and VHF/UHF.   At VHF, the
wooden/shingle combination will hardly attenuate the signal.  At UHF, it
is even less of a problem. A few hints/suggestions:  Mount the antenna
as high as possible in the attic, but avoid getting too close to nearby
metal objects (end vents, attic fans, pipe vents, etc.) since they tend
to detune the antennas. Also, you might notice that the antenna
resonates a bit lower in frequency versus a true "outdoor/in the clear"
antenna.  More likely for HF, but also possible at VHF/UHF.  Just retune
for minimum VSWR and maximum field strenght.  I dont like the diamond
antennas since the fiberglass setup is not easily tunable.  I used a
cheap MFJ 5/8 wave groundplane for years with no ill effects. Tunes
easily.  A 3 or 4 element 2M  vertically polarized beam would easily
rotate if mounted near the "floor" of the attic.   Same goes for an 8 or
10 element UHF yagi beam.

I mounted the MFJ by making a small "hook bend" at the top of the
vertical radiator, and suspended the antenna using 20# test fishing line
that looped over a 2X4 rafter.  I could easily "lower" the antenna for
final tune-ups. This setup avoided having to mount a mast in the attic,
and
allowed me to run a 20M dipole just below the 2M antenna.  Use good
feedline too (RG-213) if the run is long.

73,
Joe


From [e-mail] Wed Dec 11 19:34:36 1996
Newsgroups: rec.radio.amateur.antenna
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From: "Gary T. Craze" <[e-mail]>
Subject: Antenna in attic?
Message-ID: <[e-mail]>
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The subdivision that I moved into does not allow outside antennas of any
kind.   I do have quite a bit of room in the attic, which is above the
second story of my house.  The roof pitch is quite steep, and thus I
have about 12 feet from the "floor"  of the attic to the peek of the
roof.  I have an older ICOM IC-3200A 25W 2M/440 mobile unit that has
been used as a base station in the past, but I'm not sure about the
performance of an inside antenna.   The roof has standard composite
shingles over plywood, and the base of the antenna would be about 20
feet above the ground (the height of the floor in the attic).  I'm
looking at some of the dual band antennas like the Diamond X-200A or the
Cushcraft dual band Ringos.

Any suggestions?

Many thanks,
Gary

--
______________________________
Gary T. Craze

Visit the Glass Cockpit at
http://rampages.onramp.net/~gcraze

Visit the Compaq ACE Aviator Flying Club Homepage at
http://www.MageNet.com/~brichard/caa/

Compaq Computer Corp.
Enterprise Computing Group
Mainstream Servers

[e-mail]
281-514-7893

All comments contained herein do not necessarily represent the views of
Compaq Computer Corporation


From [e-mail] Wed Dec 11 19:34:38 1996
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From: "George J. Molnar" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Antenna in attic?
Date: Wed, 11 Dec 1996 07:18:49 -0500
Organization: Molnar & Associates, Inc
Lines: 39
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To: [e-mail]

Gary T. Craze wrote:
>
> The subdivision that I moved into does not allow outside antennas of any
> kind.   I do have quite a bit of room in the attic, which is above the
> second story of my house.  The roof pitch is quite steep, and thus I
> have about 12 feet from the "floor"  of the attic to the peek of the
> roof.  I have an older ICOM IC-3200A 25W 2M/440 mobile unit that has
> been used as a base station in the past, but I'm not sure about the
> performance of an inside antenna.   The roof has standard composite
> shingles over plywood, and the base of the antenna would be about 20
> feet above the ground (the height of the floor in the attic).  I'm
> looking at some of the dual band antennas like the Diamond X-200A or the
> Cushcraft dual band Ringos.
>
> Any suggestions?

Go ahead and try using a mobile whip (with a suitable set of radials,
etc) in the attic to verify that you can get out well enough. Compare
results with the same antenna mounted out-of-doors (say, on your car).
If there's something in your roof that will affect performance, you'll
know.

You might also look into the Ventenna, a very good disguise antenna that
mounts outside, on your roof, by sliding over existing vent pipes. They
are rugged and very effective. 2m, 220 MHz and 144/440 MHz versions are
available. I've used one for many years in a "no-antennas" neighborhood
with no problems.

If you do choose to work with an inside antenna, just be sure that you
place it as far as you can from inside wiring, or anything conductive.
It's safer and does help the radiation pattern somewhat, too.

73
--
George J. Molnar (KF2T)
Molnar & Associates, Inc.
Lebanon, New Hampshire
Respond to: [e-mail]
Web Site: http://www.cyberportal.net/gmolnar/index.html


From [e-mail] Wed Dec 11 19:34:38 1996
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Date: Sat, 07 Dec 1996 09:41:05 -0600
From: [e-mail]
Subject: Antenna Tower Installation?
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.misc
Message-ID: <[e-mail]>
Reply-To: [e-mail]
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I want to put up a 30 ft. tower on top of my 22. floor apartment. The reason f
or that is that there are many parabolic dishes and a metal forest of other an
tennas...

Does anyone have experience in tower installation? I know where I can get
the tower segments, but unfortunately the guys at the store don┤t know
how to install it.

I don┤t know what type of guy wire I need, nor how to attach the guy wire
to the roof. Should I screw the bottom of the tower down or should I mix
some
concrete?

I┤m really getting desperate, I hope someone can help a fellow ham :)

73, Patrick
-------------------==== Posted via Deja News ====-----------------------
      http://www.dejanews.com/     Search, Read, Post to Usenet


From [e-mail] Wed Dec 11 19:34:39 1996
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From: [e-mail] (Jim Kehler)
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.misc
Subject: Re: Antenna Tower Installation?
Date: Tue, 10 Dec 1996 10:24:06 GMT
Organization: PacRim Golf Accessories
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[e-mail] wrote:

>I want to put up a 30 ft. tower on top of my 22. floor apartment. The reason
for that is that there are many parabolic dishes and a metal forest of other a
ntennas...

>Does anyone have experience in tower installation? I know where I can get
>the tower segments, but unfortunately the guys at the store don┤t know
>how to install it.

>I don┤t know what type of guy wire I need, nor how to attach the guy wire
>to the roof. Should I screw the bottom of the tower down or should I mix
>some
>concrete?

>I┤m really getting desperate, I hope someone can help a fellow ham :)

>73, Patrick
>-------------------==== Posted via Deja News ====-----------------------
>      http://www.dejanews.com/     Search, Read, Post to Usenet

Patrick, most tower companies will be glad to supply you with the necessary
engineering data to install their towers.  Skip the guy in the store.

73, Jim KH2D




From [e-mail] Wed Dec 11 19:34:40 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Antenna/Tuner Questions
Date: 4 Dec 1996 21:31:09 GMT
Organization: AOL http://www.aol.com
Lines: 10
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For simplicity use one antenna cut for the lowest frequency and use 300
ohm TV twinlead or 450 ohm ladder line and tune all bands, no ground
needed except maybe a single ground rod to reduce stray rf on the radio. I
believe a long wire will behave differently as far as radiation pattern
depending on freq and length. Also it has to be used against a good
ground. Use a dipole...simple solution.



73 de gary


From [e-mail] Wed Dec 11 19:34:41 1996
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From: ken cubilo <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: antennas west half square
Date: Sun, 08 Dec 1996 18:12:38 -0500
Organization: ken cubilo electric inc.
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about 3 years ago i purchased a tech note on the half square
and went to build another about a week ago but the tech note is not
to be found in my files.could someone give me the dimensions for a
40 and 20 meter model if memory serves me right the dimensions for
a decent vswr match to 50 ohm coax are quite a bit longer then the
normal lenghts ie 40 meters 70 between vertical sections and 36 ft
vertical drops i think????
tks we8w


From [e-mail] Wed Dec 11 19:34:42 1996
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From: Eric Oyen <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: ANTRON 99 ANTENNA
Date: Mon, 02 Dec 1996 00:11:18 -0700
Organization: Goodnet
Lines: 41
Message-ID: <[e-mail]>
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Roy Lewallen wrote:
>
> In article <[e-mail]>,
>    [e-mail] wrote:
> >I was skeptical about the A-99.  A ham buddy sneaked over and put one on
> >my tower while I was out of town for a couple of days.  He changed the
> >coax to feed it from my 10 meter beam.  Man, I worked everything this side
> >of Egypt before I realized what he had done.  I dared him to take it down!
> > I simply bought him a new one $49.00 I think.  I use it for 10 and 20
> >meters and have not had the first moments problems.  I get excellent
> >signal reports too.  Here is a low cost antenna that gets results.  Cut
> >off 7 1/4" from the CB (Cuss) Solacon, and you have an A-99 without the
> >$100 price. Good luck.
>
> Unscruplous manufacturers have been known to make testimonial postings like
> this without identifying themselves. The credibility of your post would be
> enhanced by your clearly identifying yourself by name, call, and email
> address, and stating that you have no association with the company.
>
> Roy Lewallen, W7EL
Here here!!!

I have used the A-99 antenna myself and found it only marginally better
than a 10 meter ringo. The A-99 has one flaw. Its radiation angle is too
high for some of the long haul stuff (you need the ground plane kit).

Other Problems experiences with the A-99:
1. Poor construction techniques (pot metal contacts)
2. low resistivity to weather effects (fiberglass tends to shatter in
cold weather)
3. Antenna is not very efficient. RF tends to appear on the coax shield
as atnenna currents (inadequate shielding/isolation from the line)
4. Reliability on "out of band" tuning is nill. even with a decent
tuner, this stick will not radiate well on 40/30/20/15 meters. it was
designed specifically for 11 meter operation and works well (for an
end-fed half wave) on ten.

Frankly, I would rather have several tuned monoband dipoles than this
"hunk of junk".

Eric J. Oyen <[e-mail]>


From [e-mail] Wed Dec 11 19:34:43 1996
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From: [e-mail] (CDN)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: ANTRON 99 ANTENNA
Date: Mon, 02 Dec 1996 13:57:40 GMT
Organization: Systems Solutions Inc. (Arizona's Internet Provider)
Lines: 36
Message-ID: <[e-mail]>
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[e-mail] (Roy Lewallen) wrote:

>In article <[e-mail]>,
>   [e-mail] wrote:
>>I was skeptical about the A-99.  A ham buddy sneaked over and put one on
>>my tower while I was out of town for a couple of days.  He changed the
>>coax to feed it from my 10 meter beam.

How would any rational person consider using his 10 meter feedline
(presumable connected to the 10 meter antenna) for 20 meters?  Also,
in listening to 10 meters recently, the band is in the condition one
would expect for this time of the 11 year cycle.  Now really fella,
you are full of it up to your little beady eyes!


Man, I worked everything this side
>>of Egypt before I realized what he had done.  I dared him to take it down!
>> I simply bought him a new one $49.00 I think.  I use it for 10 and 20
>>meters and have not had the first moments problems.  I get excellent
>>signal reports too.  Here is a low cost antenna that gets results.  Cut
>>off 7 1/4" from the CB (Cuss) Solacon, and you have an A-99 without the
>>$100 price. Good luck.
>
>Unscruplous manufacturers have been known to make testimonial postings like
>this without identifying themselves. The credibility of your post would be
>enhanced by your clearly identifying yourself by name, call, and email
>address, and stating that you have no association with the company.
>

I think you have hit it on the head Roy.




>Roy Lewallen, W7EL



From [e-mail] Wed Dec 11 19:34:44 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: ANTRON 99 ANTENNA
Date: 2 Dec 1996 19:28:50 GMT
Organization: America Online, Inc. (1-800-827-6364) (1.13)
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Roy I think you got him peeged. But what gets to me is these People using
this A99 who swear that it has this Gain, and if you try and Educate them
they refuse to listen


From [e-mail] Wed Dec 11 19:34:45 1996
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From: [e-mail] (Jim Martin, WK1V)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: ANTRON 99 ANTENNA
Date: Wed, 04 Dec 1996 00:35:11 GMT
Organization: Shore.Net/Eco Software, Inc; ([e-mail])
Lines: 24
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[e-mail] wrote:

>Roy I think you got him peeged. But what gets to me is these People using
>this A99 who swear that it has this Gain, and if you try and Educate them
>they refuse to listen

That is why there is such a big rift between a large percentage of
CB'ers and the ham community.  No one likes to be told they're wrong
and they especially hate it when they're proved wrong.

Gawd forbid one tries to enlighten someone on a certain band and his
friends are also on the channel...woops gave it away...I mean
frequency.  Their buddy is right.  He knows everything and the one is
wrong, even if  he has an M Double E...cuz they don't know him.  And
that makes one wrong 99.5% of the time on that band.  Of course where
you are located has a lot to do with it too.

Besides the A99 does have gain....I mean when it is unplugged you hear
nothing....when you plug it in you hear all kinds of signals.  That's
gain...ain't it??   I mean that's what I heard on Channel 34.  er, I
mean frequency 34...oh never mind.

   jjm



From [e-mail] Wed Dec 11 19:34:46 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: ANTRON 99 ANTENNA
Date: 4 Dec 1996 18:12:17 GMT
Organization: America Online, Inc. (1-800-827-6364) (1.14)
Lines: 10
Message-ID: <[e-mail]>
References: <582gsh$[e-mail]>
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You know your right and I was wrong on this one. The ANTENNA DOES HAVE
gAIN
I tryed your Example on my wide spaced 5 Element 10 Meter Beam, when I
disconected the Coax from Rec couldnt Hear anything, put Coax Back on and
worked, to verify it, I hooked up my Dummy Load and performed same test
guess what same results. So using the above as reference, I turned a Motor
on and looked at My S Meter it showed 40pounds( I calibrated my for Pounds
Instead of DB more Accurate Reading) so now I know the true Gain of my
Beam, looks like 40pounds Gain, sure beats A A99, thanks for you help and
advice. 73erds


From [e-mail] Wed Dec 11 19:34:47 1996
Path: news1.epix.net!news3.epix.net!uunet!in1.uu.net!199.232.56.18!news.ultranet.com!usenet
From: Chris <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Any views on the R-7000?
Date: Fri, 06 Dec 1996 08:40:47 -0500
Organization: UltraNet Communications, Inc.
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How does it compare with other HF verticals such as the Hy Gain DX 77,
Gap titan, Butternut, or anything else similar? Any help would be
appreciated.

Chris, N1XZY


From [e-mail] Wed Dec 11 19:34:48 1996
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From: "FUman" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.digital.misc,rec.radio.amateur.dx,rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.amateur.misc,rec.radio.amateur.policy,rec.radio.amateur.space
Subject: Re: ARRL lawyer to sue member
Date: 2 Dec 1996 07:21:47 GMT
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Jim Hutchings <[e-mail]> wrote in article =
<[e-mail]>...

> second, I have been in the unfortunate position where a qualified =
capable=20
> lawyer was required.  To my great relief, we won our case and I vowed =
to=20
> never again tell another lawyer joke...I no longer get the humor
> Jim Hutchings  VE5HM

Gee, good for you Jim! How much did he charge you?

Don't you ever wonder about the screwball laws being written everyday
to restrict and regulate our laws? Do you think they're written by
Joe Concerned Citizen?

How about the financial impact lawyers have on our everyday lives?
Every time they win some humongous settlement in some pea brained
case it ends up costing the taxpayers and consumers.

Ever look up justice in the dictionary? How about all those crooks and
murders that get off every year due to some "technicality"? Ever hear
of the case of the divorce where the mom was suicidal and mentally
unable to cope without anti-psychotic medication and the father was
"normal"...mom got custody.

The responses you see here are direct reflections of our own experiences
and disdain for lawyers. When one threatedned to sue me, I posted it
so the world could see what they are really like.

Sorry you don't agree that the world would be a safer and cheaper place
without them.

de kg7fu


















From [e-mail] Wed Dec 11 19:34:49 1996
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From: Jim Hutchings <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.digital.misc,rec.radio.amateur.dx,rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.amateur.misc,rec.radio.amateur.policy,rec.radio.amateur.space
Subject: Re: ARRL lawyer to sue member
Date: Mon, 02 Dec 1996 19:39:38 -0800
Organization: SaskNet News Distribution
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>
> Sorry you don't agree that the world would be a safer and cheaper place
> without them.
>
> de kg7fu
>
> The anti-gun control groups have a snappy slogan that basically says,
"guns don't cause crime any more than flys cause garbage".  Without
debating the validity of that particular statement, I think that it's
unfair to blame lawyers for the state of our society.  I'm not suggesting
that I agree with the strange things that go on in the "legal system"
(anyone collecting oxymorons??).
On the positive side of this topic, you might note that the Feds have now
decreed that aircraft manufacturers will only be liable for 18 years
after their product has been sold instead of eternity.  Common sense does
prevail eventually.
Another point to consider is that many of these unbelievable judgements
have been rendered by juries!!  Has the point been reached where we can
no longer trust the juries??
Our society has serious problems and sleazy lawyers are a symptom, not
the problem itself.
Honest, hardworking lawyers do exist and are a valuable commodity when
someone decides to rain on your parade.  And yes, they're not
necessarily cheap, but most will try to keep costs down when they know
you're not well-off.
73 de Jim Hutchings VE5HM


From [e-mail] Wed Dec 11 19:34:50 1996
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From: [e-mail] (Michael P. Deignan)
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Subject: Re: ARRL lawyer to sue member
Date: 3 Dec 1996 13:37:31 -0500
Organization: The Ace Tomato Company
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In article <[e-mail]>,
        Jim Hutchings  <[e-mail]> wrote:

>> The anti-gun control groups have a snappy slogan that basically says,
>"guns don't cause crime any more than flys cause garbage".  Without
>debating the validity of that particular statement, I think that it's
>unfair to blame lawyers for the state of our society.

You are, to some degree, correct.

The proliferation of lawsuits really isn't the fault of the Trial
Lawyers Association. In a sense, they are merely providing a service
to accomodate a demand for legal services in our country.

It is the desire to "get rich quick" (and sueing someone seems to
be a way of doing that with little to no risk if you can get a
lawyer to take your case on a percentage basis, which most will)
that the American people have today [inherently lazy bastards
they are -- the Japanese were right -- they want to lay around
with the good life, no work, have everything paid for them by
someone else -- basically an extension of the welfare-state
mentality that permeates this country today].

MD
--
--
--  "Guns don't kill people. I kill people." -- T-shirt slogan
--
--  If you don't like my opinions, that's just too damn bad.


From [e-mail] Wed Dec 11 19:34:52 1996
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From: Roy Keeley <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.digital.misc,rec.radio.amateur.dx,rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.amateur.misc,rec.radio.amateur.policy,rec.radio.amateur.space
Subject: Re: ARRL lawyer to sue member
Date: Tue, 03 Dec 1996 11:14:10 -0600
Organization: Railway Express, Inc.
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Jim Hutchings wrote:
>
> Anthony S. Pelliccio wrote:
> >
> > In article <[e-mail]>,  <[e-mail]> wrote:
> > >There are only 3 laywer jokes...
> > >
> > >all the rest are true stories!
> >
> > I can pretty much believe that. After reading those it makes me wish
> > I had a daughter so I could forbid her to marry a lawyer. :)
> >
> > >>Why is it that when you tell a 'joke' about an Irishman it is called
> > >>tasteless; when you tell a joke about a black it is called racist, and
> > >>when you tell a joke about a lawyer it is called funny?
> >
> > Even though you didn't post this, I missed the original response so here
> > goes:
> >
> > The reason it's funny is because by and large most lawyers are lower
> > than slime.
> >
> > Tony
>
> first of all, I doubt that this is a reasonable place to be posting this
> stuff.
> second, I have been in the unfortunate position where a qualified capable
> lawyer was required.  To my great relief, we won our case and I vowed to
> never again tell another lawyer joke...I no longer get the humor
> Jim Hutchings  VE5HM

I too once needed a lawyer, and he came thru for me. I think the problem
is the
bottom half of the class. This lower 50% has contemp for the law, and
they are
who the lawyer joke are for. Basically, it is the Judges who have my
contemp, but
then they are lawyers also. And if you say, "What about the judge in my
case, where
I won", I will just say, at one point, the Judge fell asleep, and I won
in spite of him, mainly because of the strength of my lawyer.
--
73's

Roy KC4IMC

[e-mail]
[e-mail]
[e-mail]
Snail Mail = 10675 Salt Aire Rd, E., Theodore, AL 36582, USA


From [e-mail] Wed Dec 11 19:34:52 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: ARRL lawyer to sue member
Date: 3 Dec 1996 23:45:54 GMT
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A competent person is valuable in any field--including law. But  I must
confess that I find it ironic that the best (and most number) of lawyer
jokes I've heard have been told by lawyers. :-}

Chip


From [e-mail] Wed Dec 11 19:34:54 1996
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Subject: Re: ARRL lawyer to sue member
Message-ID: <[e-mail]>
From: Don Labriola <[e-mail]>
Date: Wed, 04 Dec 1996 12:10:35 -0800
Reply-To: [e-mail]
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FUman wrote:
...
> Don't you ever wonder about the screwball laws being written everyday
> to restrict and regulate our laws? Do you think they're written by
> Joe Concerned Citizen?
>
I personally think that the best thing we could do was to give congress,
(etc.) 5  years to re-touch all of the laws to make them understandable
by the average product of our school system. It would be their choice as
to modifying the laws or improving the education system! ;o)

If it has been so poorly written that only a lawyer can read it, and two
lawyers come to different opinions of what it means, then it should not
be binding! (Think what that would do the the tax structure).

$.02 from W6QS -- Don


From [e-mail] Wed Dec 11 19:34:56 1996
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From: [e-mail] (Ken Durham)
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Subject: Re: ARRL lawyer to sue member
Date: 6 Dec 1996 16:54:38 GMT
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In article <[e-mail]>, [e-mail]
says...
>
>>
>> Sorry you don't agree that the world would be a safer and cheaper place
>> without them.
>>
>> de kg7fu
>>
>> The anti-gun control groups have a snappy slogan that basically says,
>"guns don't cause crime any more than flys cause garbage".  Without
>debating the validity of that particular statement, I think that it's
>unfair to blame lawyers for the state of our society.  I'm not suggesting
>that I agree with the strange things that go on in the "legal system"
>(anyone collecting oxymorons??).
>On the positive side of this topic, you might note that the Feds have now
>decreed that aircraft manufacturers will only be liable for 18 years
>after their product has been sold instead of eternity.  Common sense does
>prevail eventually.
>Another point to consider is that many of these unbelievable judgements
>have been rendered by juries!!  Has the point been reached where we can
>no longer trust the juries??
>Our society has serious problems and sleazy lawyers are a symptom, not
>the problem itself.
>Honest, hardworking lawyers do exist and are a valuable commodity when
>someone decides to rain on your parade.  And yes, they're not
>necessarily cheap, but most will try to keep costs down when they know
>you're not well-off.
>73 de Jim Hutchings VE5HM
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
header edited



From [e-mail] Wed Dec 11 19:34:57 1996
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From: Larry DiGioia <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Balanced Feeders!
Date: Tue, 03 Dec 1996 20:07:03 -0500
Organization: Studio - D
Lines: 17
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Dan K6MHE wrote:

> Check with the Wireman [phone]. He has it and while you are at
> it you may wish to get his Wirebook II as it has a lot of good
> information on the question you asked for only $3.00.

I agree, I have been dealing with The Wireman for many years now
with no complaints. The book has priceless practical advice, mostly
from Press Jones ( [e-mail] ) - You should know that the book
is in it's 3rd edition, "Wirebook III."

By the way, Press says to use 18 gauge copperweld for radials.

============================================
Studio  D  Productions      "As seen on TV"
     http://www.bright.net/~larryd/
============================================


From [e-mail] Wed Dec 11 19:34:58 1996
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From: Cecil Moore <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Balanced Feeders!
Date: Sun, 08 Dec 1996 14:07:03 -0800
Organization: Intel Corporation
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Avatar wrote:
> A good homebrew balanced tuner can be made with
> a balun at the input (say 50 - 50 or 50 - 200 ohms) and a balanced L or
> pi network between the balun and the feeders.

Hi Dave, I've homebrewed a "balanced pi network" and it works great:


 4  --------+------inductance------+---------
 /          |                      |
 1         cap                    cap
            |                      |
 b  gnd-----+----------------------+    to 450 ohm transmission line
 a          |                      |
 l         cap                    cap
 u          |                      |
 n  --------+------inductance------+---------

This could be done with two identical unbalanced tuners. The tuner(s)
is/are tuned for 200 ohms resistive balanced impedance at the input.
The caps and inductors can be ganged for ease of tuning but with
independent control over the reactances, one can even perfectly
balance the parallel currents. Two used unbalanced tuners cost about
the same as one new unbalanced tuner.

73, Cecil, W6RCA, OOTC


From [e-mail] Wed Dec 11 19:34:59 1996
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From: "Cecil A. Moore" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Balaned wire using Coax???
Date: Mon, 02 Dec 1996 07:20:39 -0700
Organization: Delphi Internet Services Corporation
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Anthony Severdia wrote:
>     Because of very low losses, open-wire feedlines (true ladder line)
> is much preferred even though more inconvenient.  Split/parallel coax
> is ok as long as higher losses (due high VSWR) is tolerable.

Hi Tony, a compromise to consider is using short parallel runs of coax
from the transmitter to the outside of the shack and then ladder/window
line from there to the antenna - best of both worlds - and by choosing
the optimum length of 450 ohm line, one can minimize the SWR in the
parallel run of coax. In this case, changing the length of the 450 ohm
line changes the SWR on the parallel run of coax.

73, Cecil, W6RCA, OOTC


From [e-mail] Wed Dec 11 19:35:00 1996
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From: Ronan Bellabarba <[e-mail]>
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Subject: Re: BAN/INTERNET
Date: Tue, 3 Dec 1996 11:31:00 +0000
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>
> ILLEGAL INTERNET CENSORSHIP/BAN: AN AUSTRALIAN FIRST (SEE BELOW).
> SMUGGLING BOOK BACK ON MARKET - CALL FOR ROYAL COMMISSION.
>
[........bla bla ......}

what the hell has THIS got to do with organometallic chemistry???

Ronan.


From [e-mail] Wed Dec 11 19:35:02 1996
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From: Dettol <[e-mail]>
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Subject: Re: BAN/INTERNET
Date: Tue, 03 Dec 1996 16:42:07 -1000
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Ronan Bellabarba wrote:
>
> >
> > ILLEGAL INTERNET CENSORSHIP/BAN: AN AUSTRALIAN FIRST (SEE BELOW).
> > SMUGGLING BOOK BACK ON MARKET - CALL FOR ROYAL COMMISSION.
> >
> [........bla bla ......}
>
> what the hell has THIS got to do with organometallic chemistry???
>
> Ronan.

FUCK ALL!!!   ...Actually less than fuck all, FUCK NOTHING!!


MIKE


From [e-mail] Wed Dec 11 19:35:03 1996
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From: "Kevin A Young" <[e-mail]>
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Subject: battery box
Date: 7 Dec 96 19:20:16 GMT
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I am looking for information on building a battery box with an old ice
chest.  The article was published in 73 magazine about 1 year ago maybe
april through august 1995.  Any good leads in this direction would be
helpful.  Thanks KC7FPF return Email to [e-mail]



From [e-mail] Wed Dec 11 19:35:04 1996
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From: [e-mail] (Clint Bradford)
Newsgroups: rec.radio.amateur.antenna
Subject: RE: battery box
Date: Sun,  8 Dec 1996 02:34:00 GMT
Message-ID: <[e-mail]>
Organization: ATTENTION to Details BBS - Mira Loma, CA
Distribution: world
References: <01bbe473$a4731cc0$281ae0c3@radioman>
Lines: 40


>>I am looking for information on building a battery box with an old ice
>>chest.

I just logged on to ATTENTION to Details BBS at 909-681-6221
and ran their QST Magazine Search program...here's a few
articles that may interest you!

From QST for 1977 :
RESTORING NICAD CELLS AND BATTERY HOLDERS...JAN P45

From QST for 1982 :
BATTERY PACK SAFETY FOR HAND HELD RIGS...NOV P50

From QST for 1987 :
THE LUNCHBOX...[MURPHY]...AUG P28
[A great little project...close to your "ice chest" idea.]

From QST for 1988 :
DEEP CYCLE BATTERY AS AN EMERGENCY POWER SOURCE...MAY P41
PERIPHEX NICD BATTERY PACK FOR KENWOOD HANDHELD RIGS...DEC P57

From QST for 1990 :
Practical Battery-Back-Up Power for Amateur Radio Stations--Part 1
 (Thurston): 34, Mar
Practical Battery-Back-Up Power for Amateur Radio Stations--Part 2
 (Thurston): 32, Apr, 32 (see Feedback: 39, May)
Practical Battery-Back-Up Power for Amateur Radio Stations--Part 3
 (Thurston): 25, May, 25

From QST for 1991 :
One Protective Case for Many Battery Packs (Norikane): 38, Feb

From QST for 1993 :
Long-Haul H-T Battery System (Smithey): Sep, 23

From QST for 1995 :
Quick and Dirty Emergency Battery Holders (Beach): Jul, 74

-end-


From [e-mail] Wed Dec 11 19:35:05 1996
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From: "Mark Bryant" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Beam Direction Program
Date: 3 Dec 1996 05:02:00 GMT
Organization: SOHObusiness Services
Lines: 25
Message-ID: <01bbe0d7$6a7ba860$a3d879a8@soho>
References: <01bbde05$d95bdea0$a3d879a8@soho> <57tb7t$1bsi$[e-mail]>
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[e-mail] wrote in article <57tb7t$1bsi$[e-mail]>...
> In <01bbde05$d95bdea0$a3d879a8@soho>, "Mark Bryant"
<[e-mail]> writes:
> >I am looking for an on line program that allows me to enter lat/long for
my
> >location and target location.  I am trying to determine if it is true
that
> >Europe is directly beyond my service transformer on the utility pole.
> >
> >Thanks for the help
> >
> >Mark
> >
> >38/-84.5
>
>
>   It all depends on where your standing.
>
>                              Jim

But Jim, only operators are standing (by), I'm sitting.

Mark


From [e-mail] Wed Dec 11 19:35:06 1996
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From: [e-mail] (Alan Fowler)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Beam Direction Program
Date: Sat, 07 Dec 1996 07:41:12 GMT
Organization: Melbourne PC User Group Inc, Australia
Lines: 24
Message-ID: <58b3ma$[e-mail]>
References: <01bbde05$d95bdea0$a3d879a8@soho>
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"Mark Bryant" <[e-mail]> wrote:

>I am looking for an on line program that allows me to enter lat/long for my
>location and target location.  I am trying to determine if it is true that
>Europe is directly beyond my service transformer on the utility pole.

>Thanks for the help

>Mark

Mark,
        Suggest you use the formula for calculating great circle distance and
bearing angle.  Should be available in any good book on sw
propagation..
        Calculations should be only a few minutes work with a scientific
calculator.  If you get stuck, get back to me.

                                Alan.

  ,-._|\  Alan Fowler.
 /  Oz  \ Mail Address: PO Box 272, Balwyn 3103 Vic, AUSTRALIA.
 \_,--.x/ Phone: [phone]  Member, Melbourne PC User Group.
       v  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+



From [e-mail] Wed Dec 11 19:35:07 1996
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From: [e-mail] (gudmundur)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Beam Direction Program
Date: 8 Dec 1996 07:10:43 GMT
Organization: silverlake stable
Lines: 34
Distribution: world
Message-ID: <58dplj$mn2$[e-mail]>
References: <01bbde05$d95bdea0$a3d879a8@soho> <58b3ma$[e-mail]>
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In article <58b3ma$[e-mail]>, [e-mail]
says...
>
>"Mark Bryant" <[e-mail]> wrote:
>
>>I am looking for an on line program that allows me to enter lat/long
for my
>>location and target location.  I am trying to determine if it is true
that
>>Europe is directly beyond my service transformer on the utility pole.

>
>>Thanks for the help
>
>>Mark
>
>Mark,
>        Suggest you use the formula for calculating great circle
distance and
>bearing angle.  Should be available in any good book on sw
>propagation..
>        Calculations should be only a few minutes work with a
scientific
>calculator.  If you get stuck, get back to me.
>
>                                Alan.
>
There are several of these programs on the shareware market.
I have one called DXMAPPER and another who's name I forget.
 If you can't find the software (mine runs on ibm pc, 1 meg ram
cga/vga 286 or better) Get back to me, Maybe I can send it snail
mail. Think the program is about 600kbyte installed.
           73   KD3SH



From [e-mail] Wed Dec 11 19:35:08 1996
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From: [e-mail](Dan Walker)
Newsgroups: rec.radio.amateur.antenna
Subject: Bonding antenna grounds
Date: 6 Dec 1996 23:27:45 GMT
Organization: Netcom
Lines: 26
Message-ID: <58aa5h$[e-mail]>
NNTP-Posting-Host: sdx-ca7-01.ix.netcom.com
X-NETCOM-Date: Fri Dec 06  3:27:45 PM PST 1996

I have two antenna masts on opposites sides of my house.

The masts need to be grounded and the ground needs to be bonded to
the house electrical system.

Currently, I have both masts grounded to seperate ground rods. Niether
rod is bonded to the electrical system, and one rod is also used for
my station ground.

Can I run a copper wire from one ground rod to the next, then to the
electrical panel ground?

I need to know the best way to do this so I don't introduce (more) TVI.

I was planning on running a heavy copper wire around the outside walls
of my house, connecting to it the ground wires from the antennas and
from the rods, then connecting the grounds from my shack. This wire
would then connect to the ground bus in the service panel.

Is this the right way to do it?

(confused)






From [e-mail] Wed Dec 11 19:35:09 1996
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From: [e-mail](Anthony Severdia)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Bonding antenna grounds
Date: 7 Dec 1996 02:08:26 GMT
Organization: Netcom
Lines: 45
Message-ID: <58ajiq$[e-mail]>
References: <58aa5h$[e-mail]>
NNTP-Posting-Host: sfo-ca32-13.ix.netcom.com
X-NETCOM-Date: Fri Dec 06  8:08:26 PM CST 1996

In <58aa5h$[e-mail]> [e-mail](Dan Walker)
writes:
>
>I have two antenna masts on opposites sides of my house.
>
>The masts need to be grounded and the ground needs to be bonded to
>the house electrical system.
>
>Currently, I have both masts grounded to seperate ground rods. Niether
>rod is bonded to the electrical system, and one rod is also used for
>my station ground.
>
>Can I run a copper wire from one ground rod to the next, then to the
>electrical panel ground?
>
>I need to know the best way to do this so I don't introduce (more)
TVI.
>
>I was planning on running a heavy copper wire around the outside walls
>of my house, connecting to it the ground wires from the antennas and
>from the rods, then connecting the grounds from my shack. This wire
>would then connect to the ground bus in the service panel.
>
>Is this the right way to do it?
>
>(confused)

    This all might be over-kill but depends where you are located.
In any event, it is good practice for maximal protection.

    For example, at a 1000' elevation site with 4 UHF antennas NEXTEL
put in 8' ground rods spaced 10' around the entire building, bonded
everywhich way.  Now, some NEXTEL engineer decided this was best for
their needs but it seems like much overkill to me because the area
rarely-rarely has lightning strikes at all.  ESPECIALLY when there are
several FM broadcast self supporting towers at the same location with
much higher peaks above ground level!

    Like "they" say, an ounce of prevention is worth a pound of cure.
:)

    -=Tony=-    in San Francisco    KEAR-FM

ps:  BTW, the site is Mt. Beacon very near the S.F. Golden Gate in
Marin county.  About 1 mile to the ocean in several directions.


From [e-mail] Wed Dec 11 19:35:09 1996
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From: [e-mail] (derek hutter)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Bonding antenna grounds
Date: 8 Dec 1996 23:36:31 GMT
Organization: Pacifier Internet Server [phone]
Lines: 20
Message-ID: <58fjdv$[e-mail]>
References: <58aa5h$[e-mail]> <[e-mail]>
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Mime-Version: 1.0
X-Newsreader: WinVN 0.99.2

In article <[e-mail]>,
[e-mail] says...
>
>In message <58aa5h$[e-mail]> Dan Walker wrote:
>
>> I have two antenna masts on opposites sides of my house.
>>
>> The masts need to be grounded and the ground needs to be bonded to
>> the house electrical system.
>
>Why? I can think of a whole lot of reasons why I would not want
>a RF counterpoise to get mixed up with a house safety ground.
>The question is - are your masts also active antenna elements?


Its required in the United States under our National Electric Code.

Derek KJ7HB




From [e-mail] Wed Dec 11 19:35:10 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Bonding antenna grounds
Date: 9 Dec 1996 01:56:26 GMT
Organization: DigiPhone Corporation, Bryan/College Station Texas 409-693-8885
Lines: 33
Message-ID: <58frka$[e-mail]>
References: <58aa5h$[e-mail]> <[e-mail]> <58fjdv$[e-mail]>
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In <58fjdv$[e-mail]>, [e-mail] (derek hutter) writes:
>In article <[e-mail]>,
>[e-mail] says...
>>
>>In message <58aa5h$[e-mail]> Dan Walker wrote:
>>
>>> I have two antenna masts on opposites sides of my house.
>>>
>>> The masts need to be grounded and the ground needs to be bonded to
>>> the house electrical system.
>>
>>Why? I can think of a whole lot of reasons why I would not want
>>a RF counterpoise to get mixed up with a house safety ground.
>>The question is - are your masts also active antenna elements?
>
>
>Its required in the United States under our National Electric Code.
>
>Derek KJ7HB
>

Yep, and just wait until Dr. Zeus discovers that your LOVELY ground system
out in the field under your tons of towers for HF are MUCH more interesting as

a ground compared to that lowly little ground rod under your meter.  You know,

the one with the telephone arrestor ground line tied to it too?

  :)

//-----------------------------
Mike - W5WQN
[e-mail]
[e-mail]



From [e-mail] Wed Dec 11 19:35:12 1996
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From: "Peter Gottlieb" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Bonding antenna grounds
Date: 9 Dec 1996 01:50:31 GMT
Organization: Altopia Corp. - Affordable Usenet Access - http://www.alt.net
Lines: 40
Message-ID: <01bbe573$4fa60260$f50f2399@peter-s>
References: <58aa5h$[e-mail]> <[e-mail]> <58fjdv$[e-mail]>
X-Newsreader: Microsoft Internet News 4.70.1155

derek hutter <[e-mail]> wrote in article
<58fjdv$[e-mail]>...
> In article <[e-mail]>,
> [e-mail] says...
> >
> >In message <58aa5h$[e-mail]> Dan Walker wrote:
> >
> >> I have two antenna masts on opposites sides of my house.
> >>
> >> The masts need to be grounded and the ground needs to be bonded to
> >> the house electrical system.
> >
> >Why? I can think of a whole lot of reasons why I would not want
> >a RF counterpoise to get mixed up with a house safety ground.
> >The question is - are your masts also active antenna elements?
>
>
> Its required in the United States under our National Electric Code.
>
> Derek KJ7HB
>

I didn't believe it so I looked it up.  He is correct!  See section
810-21(f)(1).

I also noticed something else...

Table 810-52 dictates that the minimum antenna conductor/lead in size shall
be
number 14 for open spans of less than 150 feet (thicker for longer spans).
Now
I know most people do not really care about the NEC, but if there is a fire
(any
cause, with some insurance companies) your homeowner's insurance may become
null and void (it's in the policy fine print, at least mine).  This assumes
the
inspector knows about this, which seems pretty unlikely.

...Peter



From [e-mail] Wed Dec 11 19:35:14 1996
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From: [e-mail] (Graham Seale)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Bonding antenna grounds
Date: Sun, 08 Dec 1996 01:22:18 GMT
Organization: Southline Electrolab
Lines: 56
Message-ID: <[e-mail]>
References: <58aa5h$[e-mail]>
Reply-To: [e-mail]
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In message <58aa5h$[e-mail]> Dan Walker wrote:

> I have two antenna masts on opposites sides of my house.
>
> The masts need to be grounded and the ground needs to be bonded to
> the house electrical system.

Why? I can think of a whole lot of reasons why I would not want
a RF counterpoise to get mixed up with a house safety ground.
The question is - are your masts also active antenna elements?

> I need to know the best way to do this so I don't introduce (more)
> TVI.

A good way of introducing your TV to RF is to invite it to share
the 'ground' conductors you are intent on using to make electric
and magnetic fields with. Eg. If you attach ground radials to
to the house ground, then the house ground runs RF currents.

If you use a link coupled matcher, or maybe a isolating mains
transformer for your shack you can greatly reduce the coupling
into your TV. Alternatively you can 'break' the RF path by using
chokes wound on ferrite in the mains ground path.
Next step is to ensure the 'ground' side, equipment
frames et al in your shack are not also expected to be any part
the radiating antenna elements. If you don't use balanced feeder,
then use a choke balun (ferrite tube rings around the coax) at the
place it enters the shack. Get the RF out to the radiating
conductors, away from all the electrical kit in your shack (and
the rest of your household).

I assume you have done the standard things to stop TVI, such
as lowpass filter in rig output to stop harmonics, bandpass
filter at TV downlead to reject rig etc.


> I was planning on running a heavy copper wire around the outside walls
> of my house, connecting to it the ground wires from the antennas and
> from the rods, then connecting the grounds from my shack. This wire
> would then connect to the ground bus in the service panel.

Before you go to this expense, do tell why you think it is a good idea.
You may have read it it some respected publication, (ARRL ??) or
it may be current advice from your Ham pals. I am sure bonding to
heavy ground straps that lead to a house ground is done often, and
maybe with good cause, but in my experience, it has always led
to problems. There will be many anecdotes even about how grounding
'improved' a situation, and I have seen this myself. But when you
exhaustivly chase down TVI, identifying the currents, coupling
mechanisms, etc. you usually find that keeping the RF kit to
itself has a big payoff in terms of losing TVI and shack sting.

Regards de G4WNT

--
Graham


From [e-mail] Wed Dec 11 19:35:15 1996
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From: [e-mail] (Dick Flanagan)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Bonding antenna grounds
Date: Mon, 09 Dec 1996 09:20:17 -0800
Organization: Libelle Productions, Inc., Minden, Nevada USA
Lines: 13
Distribution: world
Message-ID: <[e-mail]>
References: <58aa5h$[e-mail]> <[e-mail]> <58fjdv$[e-mail]> <58frka$[e-mail]>
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In article <58frka$[e-mail]>, [e-mail] wrote:
>Yep, and just wait until Dr. Zeus discovers that your LOVELY ground system
>out in the field under your tons of towers for HF are MUCH more interesting a
s
>a ground compared to that lowly little ground rod under your meter.  You
know,
>the one with the telephone arrestor ground line tied to it too?

I would prefer Zeus use that nice tower ground, but I would also want my
house ground to be bonded to it so they both can rise and fall together.
Otherwise, the potential between the two grounds can fry everything
connected to the one in the house.
--
Dick Flanagan W6OLD CFII Minden, Nevada


From [e-mail] Wed Dec 11 19:35:16 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Bonding antenna grounds
Date: 9 Dec 1996 23:06:28 GMT
Organization: DigiPhone Corporation, Bryan/College Station Texas 409-693-8885
Lines: 36
Message-ID: <58i61k$[e-mail]>
References: <58aa5h$[e-mail]> <[e-mail]> <58fjdv$[e-mail]> <58frka$[e-mail]> <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: usr22s8.myriad.net
X-Newsreader: IBM NewsReader/2 2.0

In <[e-mail]>, [e-mail].
com (Dick Flanagan) writes:
>In article <58frka$[e-mail]>, [e-mail] wrote:
>>Yep, and just wait until Dr. Zeus discovers that your LOVELY ground system
>>out in the field under your tons of towers for HF are MUCH more interesting
as
>>a ground compared to that lowly little ground rod under your meter.  You
>know,
>>the one with the telephone arrestor ground line tied to it too?
>
>I would prefer Zeus use that nice tower ground, but I would also want my
>house ground to be bonded to it so they both can rise and fall together.
>Otherwise, the potential between the two grounds can fry everything
>connected to the one in the house.
>--
>Dick Flanagan W6OLD CFII Minden, Nevada

You are *SO* right!  When you start to research how to do this and do it
right, suddenly you realize that for the average person that cannot bring thei
r
antenna stuff in at the same place as the powerline drop and REALLY go to
work on making that one ground a good one ...

    suddenly you get this sinking feeling that doing the job right is
    going to be a big time project and expensive!

    It is.

I suspect more hams with country QTH locations take damage this way than
most people realize.  It has been my number one problem ever since I did
the job right for biger low band arrays....

    :(  :( .....and  many more of them....

//-----------------------------
Mike - W5WQN
[e-mail]
[e-mail]



From [e-mail] Wed Dec 11 19:35:18 1996
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From: "William E. Sabin" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Bonding antenna grounds
Date: Mon, 09 Dec 1996 18:28:38 -0800
Organization: none
Lines: 29
Message-ID: <[e-mail]>
References: <58aa5h$[e-mail]> <[e-mail]> <58fjdv$[e-mail]> <58frka$[e-mail]> <[e-mail]> <58i61k$[e-mail]>
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[e-mail] wrote:
>
>
> You are *SO* right!  When you start to research how to do this and do it

>
>     suddenly you get this sinking feeling that doing the job right is
>     going to be a big time project and expensive!
>
>     It is.

When we consider the sub-microsecond risetimes of lightning strokes, and
when we consider the *inductance* and wavelengths of long grounding
straps that tie things together, is it realistic to assume that an
absolutely lightning-proof system is possible. Don't we at some point
have to say "this is good enough for all practical purposes except for a
very catastrophic but very unlikely event"?

Don't we have to decouple the equipment from antenna leads, using
isolation transformers or link couplings with alternate paths to an
alternate ground "dump", to protect equipment?

Don't we need static discharge devices like RF chokes to building ground
to bleed off *slow* static voltage buildups that can zap things?

I get the impression from this thread that there is a "mission
impossible" attitude about lightning protection. Is this realistic?

Bill W0IYH


From [e-mail] Wed Dec 11 19:35:19 1996
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From: "William E. Sabin" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Bonding antenna grounds
Date: Tue, 10 Dec 1996 12:53:40 -0800
Organization: none
Lines: 21
Message-ID: <[e-mail]>
References: <58aa5h$[e-mail]> <[e-mail]> <58fjdv$[e-mail]> <58frka$[e-mail]> <[e-mail]> <58i61k$[e-mail]> <[e-mail]> <58k7op$[e-mail]>
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[e-mail] wrote:
>
> In <[e-mail]>, "William E. Sabin"

>
> Tying a blitz bug to the number 16 ground wire that ties your transceiver an
d
> all together on your table top is not all that is required.

(sarcasm)

We are not advocating this level of inadequacy. One of my previous
questions involved the extremely fast rise time of lightning strokes,
where very small values of inductance (a few microhenries) act like an
open circuit for the intial impulse. When we talk about "bonding" things
together that are separated by perhaps 100 or 200 feet, is it realistic
to think that we can do that without a *very* expensive ground plane?
One possible answer is that the "circuit" inductance "stretches" the
impulse into the form of a damped oscillation that can be dissipated over
a period of several milliseconds.

Bill W0IYH


From [e-mail] Wed Dec 11 19:35:20 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Bonding antenna grounds
Date: 10 Dec 1996 17:48:09 GMT
Organization: DigiPhone Corporation, Bryan/College Station Texas 409-693-8885
Lines: 45
Message-ID: <58k7op$[e-mail]>
References: <58aa5h$[e-mail]> <[e-mail]> <58fjdv$[e-mail]> <58frka$[e-mail]> <[e-mail]> <58i61k$[e-mail]> <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: usr14s4.myriad.net
X-Newsreader: IBM NewsReader/2 2.0

In <[e-mail]>, "William E. Sabin" <sabinw@crpl
.cedar-rapids.lib.ia.us> writes:
>[e-mail] wrote:

>have to say "this is good enough for all practical purposes except for a
>very catastrophic but very unlikely event"?

Yes, practical safety is possible.  Unlikely?  That depends.  For the average
city dweller, prolly so.  If you live out in the country, you learn, or get to

learn with pretty good regularity, that unlikely ain't the word to use.

The Polyphasor chart on frequency of strikes vs. time and height is right on
target per my 30 years of experience.  It covers steady service for all these
years on everything from ground mounted and roughly 30 foot top stuff, to a
long number of years of service at WTAW-AM where the tower was some 256
feet high.

>Don't we have to decouple the equipment from antenna leads, using
>isolation transformers or link couplings with alternate paths to an
>alternate ground "dump", to protect equipment?

The most characteristic protective technology seems to be gas discharge units
that clamp the surge to a proper ground sink and keep it from proceeding into
your gear.   That and disconnect when not in service.

>Don't we need static discharge devices like RF chokes to building ground
>to bleed off *slow* static voltage buildups that can zap things?

That is normal, behind the surge stuff.

>I get the impression from this thread that there is a "mission
>impossible" attitude about lightning protection. Is this realistic?
>
>Bill W0IYH

Not at all.  It is just that the average ham seems to be unaware of what the
level of investment is to protect gear, that's all.

Tying a blitz bug to the number 16 ground wire that ties your transceiver and
all together on your table top is not all that is required.

//-----------------------------
Mike - W5WQN
[e-mail]
[e-mail]



From [e-mail] Wed Dec 11 19:35:21 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!news.sprintlink.net!news-hub.sprintlink.net!news.sprintlink.net!news-peer.sprintlink.net!howland.erols.net!dciteleport.com!worldnet.att.net!uunet!in3.uu.net!204.177.172.254!news.eden.com!net-4-150
From: [e-mail] (KW5Q)
Newsgroups: rec.radio.amateur.antenna
Subject: Book on antenna theory and design
Date: Wed, 04 Dec 96 18:04:35 GMT
Organization: Adhesive Media, Inc.
Lines: 10
Message-ID: <584ehd$bqb$[e-mail]>
NNTP-Posting-Host: net-4-150.austin.eden.com
X-Newsreader: News Xpress Version 1.0 Beta #4

I'm looking for a book on HF antenna theory and design.
Preferrably advanced level, mathematical analytical or numerical
modelling OK.  Thanks in advance.


$$e^{-\frac12 K^2} \frac d{dK} e^{\frac12 K^2}e^{\sqrt{in}}$$
Kevin McWilliams
KW5Q
Applied Mathematician



From [e-mail] Wed Dec 11 19:35:22 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!news.netone.com!news-out.internetmci.com!newsfeed.internetmci.com!howland.erols.net!newspump.sol.net!spool.mu.edu!newshub.tc.umn.edu!fu-berlin.de!news.belwue.de!news.informatik.uni-stuttgart.de!gelleric
From: [e-mail] (Wolfgang Gellerich)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Book on antenna theory and design
Date: 5 Dec 1996 09:08:39 GMT
Organization: Informatik, Uni Stuttgart, Germany
Lines: 9
Sender: gelleric@kafka (Wolfgang Gellerich)
Distribution: world
Message-ID: <5863en$[e-mail]>
References: <584ehd$bqb$[e-mail]>
NNTP-Posting-Host: kafka.informatik.uni-stuttgart.de

In article <584ehd$bqb$[e-mail]>, [e-mail] (KW5Q) writes:
|> I'm looking for a book on HF antenna theory and design.
|> Preferrably advanced level, mathematical analytical or numerical
|> modelling OK.  Thanks in advance.
|>

How about "Antennas" by J.D. Krauss ?

73, Wolfgang DJ3TZ


From [e-mail] Wed Dec 11 19:35:23 1996
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From: Conrad Pfromm <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: building your own antenna
Date: Sun, 01 Dec 1996 14:45:25 -0800
Organization: Rockville, IN   KC4ZKQ
Lines: 7
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
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Can someone point me towards a good source to purchase aluminum tubing
for elements, booms, etc.?

Thanks.

Con Pfromm, KC4ZKQ



From [e-mail] Wed Dec 11 19:35:24 1996
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From: [e-mail] (K Campbell)
Newsgroups: rec.radio.amateur.antenna
Subject: Butternut Vertical Maintainence
Date: 8 Dec 1996 21:48:27 GMT
Organization: Prodigy Services Company 1-800-PRODIGY
Lines: 8
Distribution: world
Message-ID: <58fd3b$[e-mail]>
NNTP-Posting-Host: innugap2-int.news.prodigy.com
X-Newsreader: BBUsenet Version 1.0

After 5 years of use I want to clean up my HF6 and move it from a
ground mount to a mast mount.  2 questions:
1. Some of the joints where the tubing telescopes is seized, cant even
twist them.  How can I get these sections apart to clean up without
ruining them?
2. I want to mount it on a mast at a base height of about 35 feet.
Will this require changing the length of the overall antenna, and also
how about the 15 meter galvanized wire stub?


From [e-mail] Wed Dec 11 19:35:25 1996
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From: ken cubilo <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Butternut Vertical Maintainence
Date: Sun, 08 Dec 1996 18:03:58 -0500
Organization: ken cubilo electric inc.
Lines: 17
Message-ID: <[e-mail]>
References: <58fd3b$[e-mail]>
Reply-To: [e-mail]
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K Campbell wrote:
>
> After 5 years of use I want to clean up my HF6 and move it from a
> ground mount to a mast mount.  2 questions:
> 1. Some of the joints where the tubing telescopes is seized, cant even
> twist them.  How can I get these sections apart to clean up without
> ruining them?
> 2. I want to mount it on a mast at a base height of about 35 feet.
> Will this require changing the length of the overall antenna, and also
> how about the 15 meter galvanized wire stub?
I would suggest using a propane torch heating the sections then adding
a fine oil to soak in between the sections but be carefull as some of
the finer oils will flash when in contact with heat.seems to me that
when i used mine elevated that the res. freq raises and i had to make
the various adjustments longer to offset this the 15 meter wire if i
remember correctly had to be made 3.5 inches longer. good luck
we8w


From [e-mail] Wed Dec 11 19:35:26 1996
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From: [e-mail] (Doug Shock)
Newsgroups: rec.radio.amateur.antenna
Subject: C-3 or KT34A
Date: 8 Dec 1996 04:56:43 GMT
Organization: Internet Express (800-592-1240 customer service)
Lines: 7
Message-ID: <58dhqb$[e-mail]>
NNTP-Posting-Host: networker.usa.net
X-Newsreader: TIN [UNIX 1.3 950824BETA PL0]

Can anyone provide any feedback on the C-3 compared to the KT34A. Is it
worth getting rid of a KT34A for a C-3?
--
73 de                          "Its not who asked the question but
AA0UF/Doug                      what the question was that counts."
                              ______________________________________



From [e-mail] Wed Dec 11 19:35:27 1996
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From: Utter Chaos <[e-mail]>
Newsgroups: alt.radio.pirate,rec.radio.amateur.antenna
Subject: Carrier Current Anternna Design Info???
Date: Fri, 06 Dec 1996 18:36:38 -0800
Organization: KAOS 104.7 FM
Lines: 5
Message-ID: <[e-mail]>
Reply-To: [e-mail]
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Can someone post or send me some information regarding carrier
current antenna systems?  Such as, which portion of the AC line is used
for the center conductor of the incoming signal, proper
coupling/matching and losses of RF energy through AC wiring.  Thanks.



From [e-mail] Wed Dec 11 19:35:28 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.idt.net!newsfeed.internetmci.com!abc.minot.com!news
From: [e-mail] (owl)
Newsgroups: rec.radio.amateur.antenna
Subject: cde rotor control cable wiring for pr44 needed
Date: Tue, 03 Dec 1996 10:22:17 GMT
Organization: Magic Internet Services (Minot, ND)
Lines: 2
Message-ID: <580vio$[e-mail]>
NNTP-Posting-Host: ppp7.minot.com
X-Newsreader: Forte Free Agent 1.1/32.230

need wiring diagram for a cde pr44 rotor and controler.



From [e-mail] Wed Dec 11 19:35:28 1996
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From: [e-mail] (owl)
Newsgroups: rec.radio.amateur.antenna
Subject: cde rotor control pr44 wiring help
Date: Tue, 03 Dec 1996 10:22:15 GMT
Organization: Magic Internet Services (Minot, ND)
Lines: 9
Message-ID: <580vim$[e-mail]>
NNTP-Posting-Host: ppp7.minot.com
X-Newsreader: Forte Free Agent 1.1/32.230

does anybody have the wiring information for the series 3-816 or 3-130
controler for the cde pr44. the colors on the control cable are
orange,black,green,white,red,brown,blue.

any help will be greatly appriciated.
tom  kb0dsv
[e-mail]
[e-mail]



From [e-mail] Wed Dec 11 19:35:29 1996
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From: scott <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: CHEAP RF ABSORBER?
Date: Sat, 07 Dec 1996 18:25:37 -0800
Organization: Aero Head Aviation
Lines: 22
Message-ID: <[e-mail]>
References: <[e-mail]>
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[e-mail] wrote:
>
> Hi There--
>
> Anyone know of cheap anechoic material that could be used in a home range?
> Should be opaque from 500-1500 Megs.Water-based stuff ok.
>
> Thanks!
>
> Chip N1IR

Neighbors work good ... Hi Hi!  And sometimes they're even dummy loads.
73, Scott.

PS...this is meant purely in fun...I'm in a goofy mood today...must be
the cold and snow up here in Wisconsin.
N0EDV

--
Gotta FLY or gonna Die !
    Ask me about my
 Aeronca Super Chief !


From [e-mail] Wed Dec 11 19:35:30 1996
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From: KS <[e-mail]>
Newsgroups: sci.electronics.basics,rec.radio.amateur.antenna
Subject: connecting 3 coax cables , how?
Date: Mon, 02 Dec 1996 17:07:14 +0100
Organization: V2S DigitalWorlds
Lines: 13
Message-ID: <[e-mail]>
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Anyone ?

I want to connect 3 or more coaxes together with a transformer
I know the arrangement to make a splitter, but I would like to connect 3
coaxes equaly, so it must something symmetric I guess..say up to 1 Ghz
or something...

Thanks

please email me .....

Ko



From [e-mail] Wed Dec 11 19:35:31 1996
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From: [e-mail]
Newsgroups: alt.radio.scanner,rec.radio.scanner,rec.radio.amateur.antenna
Subject: Cordless Phone Question
Date: Thu, 05 Dec 1996 17:01:18 +0000
Organization: Alpha.net -- Milwaukee, WI
Lines: 7
Message-ID: <[e-mail]>
Reply-To: [e-mail]
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I just recently purchased a 25-chanel cordless phone and was wondering
how to increase its range.  I was thinking a longer antenna on the base
unit (It only has a short stubby one now).

Any suggestions?

Andrew


From [e-mail] Wed Dec 11 19:35:32 1996
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!zombie.ncsc.mil!nntp.coast.net!worldnet.att.net!newsadm
From: Michael Perry <[e-mail]>
Newsgroups: alt.radio.scanner,rec.radio.scanner,rec.radio.amateur.antenna
Subject: Re: Cordless Phone Question
Date: 6 Dec 1996 01:49:37 GMT
Organization: AT&T WorldNet Services
Lines: 11
Message-ID: <587u3h$[e-mail]>
References: <[e-mail]>
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[e-mail] wrote:
>I just recently purchased a 25-chanel cordless phone and was wondering
>how to increase its range.  I was thinking a longer antenna on the base
>unit (It only has a short stubby one now).
>
>Any suggestions?
>
>Andrew
I'll look it up but there is an outside dipole antenna-for transmitting
by a co. in TX I believe, I try to dig up the catalog in my closet



From [e-mail] Wed Dec 11 19:35:32 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!tezcat!cam-news-hub1.bbnplanet.com!news.bbnplanet.com!su-news-hub1.bbnplanet.com!arclight.uoregon.edu!worldnet.att.net!ix.netcom.com!news
From: [e-mail] (Sean)
Newsgroups: alt.radio.scanner,rec.radio.scanner,rec.radio.amateur.antenna
Subject: Re: Cordless Phone Question
Date: Sun, 08 Dec 1996 23:58:09 GMT
Organization: Netcom
Lines: 18
Message-ID: <58fken$[e-mail]>
References: <[e-mail]>
Reply-To: [e-mail]
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[e-mail] wrote:

>I just recently purchased a 25-chanel cordless phone and was wondering
>how to increase its range.  I was thinking a longer antenna on the base
>unit (It only has a short stubby one now).

>Any suggestions?

Well, you need to be aware of a few things first.  If this phone isn't
scrambled or protected by some means, you may want to consider
increasing the range.  Also, you need to consider what band the phone
is on.  If the base has a "stubby" antenna, then there's a good chance
it's a 900MHz phone.  In the even that it's a 46MHz phone, then I know
Copper Electronics sells about an 8 foot external antenna to extend
cordless phones for about $30.. and you just stick an alligator clip
on the ant.  connection at the base.




From [e-mail] Wed Dec 11 19:35:33 1996
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From: [e-mail] (Bad Larry)
Newsgroups: alt.radio.scanner,rec.radio.scanner,rec.radio.amateur.antenna
Subject: Re: Cordless Phone Question
Date: Wed, 11 Dec 1996 16:13:51 GMT
Organization: .
Lines: 30
Message-ID: <32aedae3.13724492@204.30.237.53>
References: <[e-mail]> <58fken$[e-mail]> <58mk1q$[e-mail]>
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On 11 Dec 1996 15:30:02 GMT, [e-mail] (Bad  Dog) wrote:

> to whom it may concern,
>
>46/49 Mhz phones are no good. the thought of trying to get more range is
>like asking the kid with a scanner 5 blocks away if he can hear you, hehe
>I receive them on my scanner from over a mile away and you wonder why the
>phone itself can't go far out in the yard, well they were built by federal
>specs to only transmit so far but the base can be heard for over a mile. I
>think the feds weren't smart because every kid knows to listen to the
>nieghbors and extendimg the range on your phone will only let his friends
>down the street listen. so I would go to a Digital 900 Mhz phone, they have
>the best clarity and range, I drive to the store and back home while talking
>on mine and the best part is the kids can't here it on the scanner because
>of the digital signal it produces but be aware the feds have ways to uncode
>the security of anything.
>

WOW!!  You must be lazy beyond all unbelievable bounds as 900Mhz
phones have no more than 1 mile range under BEST conditions.  1/3 mile
is more realistic.  Does your dad let you take the car all the time,
or just when you want to talk on the phone?

So, when you and the other kids are listening to phone calls, do you
walk around (sorry - drive around) with your portable scanner and
900Mhz phone so you can call them and listen to yourself?  You and the
other kids must be pretty smart to have figured out how to listen to
all this stuff.




From [e-mail] Wed Dec 11 19:35:34 1996
Newsgroups: rec.radio.amateur.antenna
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!news-out.communique.net!mr.net!news.idt.net!feed1.news.erols.com!netaxs.com!news.pond.com!kd3bj!kd3bj.ampr.org!robert
From: [e-mail] (Robert E. Garland)
Subject: Re: Covert vehicle antennas wanted
Sender: [e-mail] (news)
Organization: The KD3BJ Usenet BBS
Message-ID: <[e-mail]>
References: <57psjs$[e-mail]>
X-Nntp-Posting-Host: jupiter.jtan.com
Date: Sun, 8 Dec 1996 22:52:09 GMT
Lines: 40

[e-mail] (Robert Brink) writes:

>For a special project (retrieval of stolen vehicles) I am looking for
>covert VHF antennas. The frequency is just below the six meter amateur
>band (39.1 MHz).
>I have seen several ideas in the ARRL Antenna Book, such as a
>helically wound short vertical antenna and of course the usual
>shortened 1/4 wave antenna with a loading coil, but imagine a Ferrari
>or Lamborghini with a whip antenna, that looks a bit suspicious to a
>professional thief :)
>I am trying to construct one of my own, but if someone knows a good
>design or (better) a manufacturer in the US or Europe, I would be
>happy to hear that.

>tnx es 73 de Robert

>ESRAC Homepage: http://www.esrac.ele.tue.nl (soon also: .../~robert)
>E-mail: [e-mail] (The *best* internet provider in Nijmegen)
>       [e-mail] (Redirected mail address for radio amateurs)
>       [e-mail] (Eindhoven Student Radio Amateur Club)

How about designing a loading coil that attaches to the bottom of the
regular vehicle antenna inside the fender or other space where the
antenna mount is?  It would be invisible.  At one time, Barker and
Williamson of Briston, Pennsylvania, USA made a device for using either
the 2-meter ham radio or the CB radio and the regular car radio on the
manufacturer-installed antenna.  This might be the answer to your
problem.  These devices received the "Motorola" plug from the regular car
antenna, and had a coax SO-238 socket for the 2-meter or CB radio.  A
pigtail with a "Motorola" plug went to the normal AM/FM vehicle radio
receiver.

Hope this helps.


--
     Robert Garland                            NX3S @ N3ACL.PA.USA.NOAM
     Hilltown Township Bucks County               [e-mail]
     Pennsylvania USA                                       Grid FN20ii
                         "Ham Radio is a calling"


From [e-mail] Wed Dec 11 19:35:36 1996
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From: [e-mail] (Kona Stan)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: DDRR
Date: Tue, 03 Dec 1996 05:56:31 GMT
Organization: GTE Intelligent Network Services, GTE INS
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References: <[e-mail]>
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On 25 Nov 96 02:44:27 GMT, [e-mail] wrote:

>
>re: Deluxe Dual Ring Resonator (DDRR)
>
>While watching Star Trek: First Contact, did anyone else notice the
>tower in the background of the Alaska scene?
>
>Description: What I noticed was a tower, approximately 70 feet high,
>isolated from ground.  It had two rings on it which may or may not
>have been radiators.  One ring was about 50 feet high, and roughly 30
>feet in diameter.  The second ring was above it about 10 feet,
>diameter roughly 20 feet.  Below the bottom ring and attached to it
>was an inverted wire cone, which if a classic DDRR, is the actual
>radiating portion.
>
>Does this antenna exist? I suspect that it was constructed for visual
>impact only, but it is very close to a dual ring beam concept that I
>have thought about occasionally.  If a second ring is 1/4 wavelength
>radius away, should this not compress the vertical radiation down
>toward the horizon in more of a donut fashion?  My design was only
>the dual rings, not inclusive of the inverted discone.  Food for
>thought.
>
>
>IBCNU
>
>Tom



Looks like a large discone antenna to me.
By the way my wife wanted to know if the Star Trek
guys have a WASS award. (Worked All Star Systems)
Kona Stan AH6JR


From [e-mail] Wed Dec 11 19:35:37 1996
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From: z@.
Newsgroups: rec.radio.amateur.antenna
Subject: design help needed
Date: Sun, 08 Dec 1996 00:15:46 -0500
Organization: AT&T WorldNet Services
Lines: 7
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Have a bearcat bc855 w/broken antenna. using piece of wire, doesn't
work that well. could someone please post a simple wire antenna
that would work well with this scanner? I moniter 39-930 mhz, would
prefer optimized for 39 mhz. am handicapped, can't do a big antenna
outdoors, but can string wire indoors.
 any help would be greatly appreciated.
                                          -Rick


From [e-mail] Wed Dec 11 19:35:38 1996
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From: "Scott Winton" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Direction finding antenna
Date: 11 Dec 1996 20:30:17 GMT
Organization: Bizzy Bee Enterprises
Lines: 8
Message-ID: <01bbe7a3$7fa92e60$[e-mail]>
NNTP-Posting-Host: swinton.georgian.net
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I was wondering if anyone has built or has plans to build a direction
finding antenna. It will be connected to a 2m vhf mobile radio. I'm able to
get my hands on some aviation equipment and was wondering if a automatic
direction finding (ADF) antenna and the in cockpit ADF gauge could be used.

Thanks Scott

email [e-mail]


From [e-mail] Wed Dec 11 19:35:39 1996
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From: [e-mail] (Lab User)
Newsgroups: rec.radio.amateur.antenna
Subject: Dorm room antenna
Date: Sat, 07 Dec 96 00:03:51 GMT
Organization: Northern Michigan University
Lines: 12
Message-ID: <58acbh$[e-mail]>
NNTP-Posting-Host: 198.110.198.110
X-Newsreader: News Xpress 2.0 Beta #2

Hello all,  I am a relatively new amateur operator living in a college dorm
room.  I am currently living on the second floor of a three story building.
The use of antennas outside of the building is strictly against university
rules.

Does anyone have any ideas on an antenna I could build that would be most
effective for this situation?

Thanks

Tim KC8FEW
[e-mail]


From [e-mail] Wed Dec 11 19:35:41 1996
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From: [e-mail] (A.G. von Luternow)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Dorm room antenna
Date: Tue, 10 Dec 1996 01:40:26 GMT
Organization: -
Lines: 40
Message-ID: <[e-mail]>
References: <58acbh$[e-mail]>
Reply-To: [e-mail]
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Hi Tim,

This is a piece of cake as long as you have a support to anchor the
far end of your new wire antenna and a tuner. On the outer casing of
the window use a screw eye as a support and run the wire as high up
and long as possible (30 feet is not long). You can use #18 wire and
no one will notice. You should be able to tune up on almost all bands
and running under 100 watts you can have a blast.

I once lived in a first floor apartment in a "no antenna" complex. I
had a half-wave horizontal loop for 80 mtrs that was no higher than 30
feet at any point. Besides doing an FB job on 75/80, it worked
adequately on 160. VKs on 30 mtrs at 0800/0900Z were to be expected
several times a month and working a UO on twenty SSB happened.

Don't expect miracles but you can be QRV. Use the text books more
often than the log books

73 de n4jvp
Fritz

On Sat, 07 Dec 96 00:03:51 GMT, [e-mail] (Lab User)
wrote:

>Hello all,  I am a relatively new amateur operator living in a college dorm
>room.  I am currently living on the second floor of a three story building.
>The use of antennas outside of the building is strictly against university
>rules.
>
>Does anyone have any ideas on an antenna I could build that would be most
>effective for this situation?
>
>Thanks
>
>Tim KC8FEW
>[e-mail]

To reply to this message, please remove the
underscore from the beginning of the reply to
address. I'm trying to fight the spam-bots!


From [e-mail] Wed Dec 11 19:35:42 1996
Newsgroups: rec.radio.amateur.antenna
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From: Steve Ellington <[e-mail]>
Subject: Re: Dorm room antenna
X-Nntp-Posting-Host: lou-13-1.iglou.net
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What frequency?

> Hello all,  I am a relatively new amateur operator living in a college dorm
> room.  I am currently living on the second floor of a three story building.
> The use of antennas outside of the building is strictly against university
> rules.
>
> Does anyone have any ideas on an antenna I could build that would be most
> effective for this situation?
>
> Thanks
>
> Tim KC8FEW
> [e-mail]


From [e-mail] Wed Dec 11 19:35:44 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Dorm room antenna
Date: 10 Dec 1996 23:31:53 GMT
Organization: AOL http://www.aol.com
Lines: 34
Message-ID: <[e-mail]>
References: <58acbh$[e-mail]>
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In article <58acbh$[e-mail]>, [e-mail] (Lab
User) writes:

>Hello all,  I am a relatively new amateur operator living in a college
dorm
>room.  I am currently living on the second floor of a three story
building.
>The use of antennas outside of the building is strictly against
university
>rules.
>
>Does anyone have any ideas on an antenna I could build that would be most

>effective for this situation?
>
>Thanks
>
>Tim KC8FEW
>[e-mail]
>
>

You don't say what bands you'll be operating on, or what the dorms are
constructed of.  Steel construction can be difficult, while old stone and
wood presents little in the way of difficulty.  Do you want to get on HF,
or VHF & UHF.  VHF & UHF are relatively easy, you can build coaxial
dipoles and hang them in your window, or build J Poles out of coax, and
insert them into white ABS PVC pipe so they'll stand up.  There are a
variety of solution for almost any antenna.  For HF, if you can't get the
antenna outside, you're strictly limited to low power to protect yourself
and others around you.  Loops around the room, thin wire placed along the
outside of the building (enameled wire approximately the same color as the
building is invisible from  more than 10 feet away.  There are a variety
of solutions, but what do you want?  -art clemons-  n8blk/3


From [e-mail] Wed Dec 11 19:35:45 1996
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From: James Lee Tabor <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Double Bazooka
Date: Fri, 06 Dec 1996 14:28:50 -0600
Organization: Kangaroo Tabor Software
Lines: 17
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Hi,

The International Antenna Corps Double Bazooka? Anyone used this
antenna?

There is a write up in Dec CQ, but it doesn't say much about how
well it works. The antenna looks interesting. Being commercially
manufactured, it supposably overcomes the weaknesses of homebrew
antennas of the same type. ie; mechanical weakness.

Thanks,
Jim - ku5s
--
Communications Analysis Prediction Wizard
http://www.wtrt.net/~ku5s/
CAPMan HF Propagation Prediction & System Analysis Software
http://ourworld.compuserve.com/homepages/KU5S


From [e-mail] Wed Dec 11 19:35:46 1996
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From: "John Bates, Jr." <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Double Bazooka
Date: Fri, 06 Dec 1996 22:10:53 -0600
Organization: Corporate Communications
Lines: 26
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References: <[e-mail]>
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James Lee Tabor wrote:
>
> Hi,
>
> The International Antenna Corps Double Bazooka? Anyone used this
> antenna?
>
> There is a write up in Dec CQ, but it doesn't say much about how
> well it works. The antenna looks interesting. Being commercially
> manufactured, it supposably overcomes the weaknesses of homebrew
> antennas of the same type. ie; mechanical weakness.
>
> Thanks,
> Jim - ku5s
> --
> Communications Analysis Prediction Wizard
> http://www.wtrt.net/~ku5s/
> CAPMan HF Propagation Prediction & System Analysis Software
> http://ourworld.compuserve.com/homepages/KU5S

I have used this type of antenna for 80 and 40 since 1977. I designed
mine from the ARRL Handbook Dtd 1976 page 599. The original antenna
was designed by M.I.T. for radar use. This antenna uses 300 ohm ladder
line on the ends.

John - KB0UY


From [e-mail] Wed Dec 11 19:35:47 1996
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From: Zack Lau <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Double Bazooka
Date: Sat, 07 Dec 1996 17:37:14 -0500
Organization: American Radio Relay League
Lines: 20
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References: <[e-mail]> <[e-mail]> <[e-mail]>
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X-Mailer: Mozilla 2.0 (Win16; I)

> John Bates, Jr. wrote:

> > I have used this type of antenna for 80 and 40 since 1977. I designed
> > mine from the ARRL Handbook Dtd 1976 page 599. The original antenna
> > was designed by M.I.T. for radar use. This antenna uses 300 ohm

Does anyone know a reference that has the dimensions
of the original MIT antenna?  The July 1968 article
has a drawing of the original antenna made out of air
insulated coaxial line without the physical dimensions.

Interestingly enough, the Principles of Radar by the
MIT Radar School Staff has a picture of antenna that
looks closer to the adapted antenna than is depicted
in QST, but is used for a different context.  Fig 8 on
page 903 is used to discuss adjusting the impedance of
the antennas.   Broadbanding was discussed in the
earlier section--using special shapes or large diameters.

Zack W1VT  [e-mail].


From [e-mail] Wed Dec 11 19:35:48 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Double Bazooka
Date: 7 Dec 1996 04:31:46 GMT
Organization: AOL http://www.aol.com
Lines: 18
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]
X-Newsreader: AOL Offline Reader

In article <[e-mail]>, James Lee Tabor <[e-mail]>
writes:

>
>There is a write up in Dec CQ, but it doesn't say much about how
>well it works. The antenna looks interesting. Being commercially
>manufactured, it supposably overcomes the weaknesses of homebrew
>antennas of the same type. ie; mechanical weakness.
>
>Thanks,
>Jim - ku5s

It is a dipole, keep that in mind. It has no gain over a conventional wire
dipole, although it may be mechanically better.

I can't believe manufacturers charge as much as they do for a dipole!

73 Tom


From [e-mail] Wed Dec 11 19:35:50 1996
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From: "Chuck (Jack) Hawley" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Double Bazooka
Date: Sat, 07 Dec 1996 09:49:48 -0600
Organization: University of Illinois at Urbana-Champaign
Lines: 38
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References: <[e-mail]> <[e-mail]> <[e-mail]>
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Matthew A. Erickson wrote:
>
> John Bates, Jr. wrote:
> >
> > James Lee Tabor wrote:
> > >
> > > Hi,
> > >
> > > The International Antenna Corps Double Bazooka? Anyone used this
> > > antenna?
> > >
> > > There is a write up in Dec CQ, but it doesn't say much about how
> > > well it works.

I have decided to drop my sub to CQ because of the lack of tech quality
in the reviews, etc.

> > >The antenna looks interesting. Being commercially
> > > manufactured, it supposably overcomes the weaknesses of homebrew
> > > antennas of the same type. ie; mechanical weakness.

> > I have used this type of antenna for 80 and 40 since 1977. I designed
> > mine from the ARRL Handbook Dtd 1976 page 599. The original antenna
> > was designed by M.I.T. for radar use. This antenna uses 300 ohm ladder
> > line on the ends.
> >
> > John - KB0UY

> I use one of these antennas for 80mtrs, it's made of all RG-58U coax,
> including the feed line. It's a very broad bandwidth, and show abit of
> gain over a dipole, about 2db, truly a excellent antenna.

How does it have gain over a dipole....must have a narrower pattern? Why
would you want a dipole to have a wide bandwidth and then have a narrow
pattern? 2db? That's a lot. What does Kurt say (.... ..)?

Chuck, KE9UW



From [e-mail] Wed Dec 11 19:35:52 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.net!news.idt.net!feed1.news.erols.com!insync!news.io.com!usenet
From: "Matthew A. Erickson" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Double Bazooka
Date: Sat, 07 Dec 1996 08:00:25 -0800
Organization: The-Q-continum
Lines: 33
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
Reply-To: [e-mail]
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John Bates, Jr. wrote:
>
> James Lee Tabor wrote:
> >
> > Hi,
> >
> > The International Antenna Corps Double Bazooka? Anyone used this
> > antenna?
> >
> > There is a write up in Dec CQ, but it doesn't say much about how
> > well it works. The antenna looks interesting. Being commercially
> > manufactured, it supposably overcomes the weaknesses of homebrew
> > antennas of the same type. ie; mechanical weakness.
> >
> > Thanks,
> > Jim - ku5s
> > --
> > Communications Analysis Prediction Wizard
> > http://www.wtrt.net/~ku5s/
> > CAPMan HF Propagation Prediction & System Analysis Software
> > http://ourworld.compuserve.com/homepages/KU5S
>
> I have used this type of antenna for 80 and 40 since 1977. I designed
> mine from the ARRL Handbook Dtd 1976 page 599. The original antenna
> was designed by M.I.T. for radar use. This antenna uses 300 ohm ladder
> line on the ends.
>
> John - KB0UY
I use one of these antennas for 80mtrs, it's made of all RG-58U coax,
including the feed line. It's a very broad bandwidth, and show abit of
gain over a dipole, about 2db, truly a excellent antenna.




From [e-mail] Wed Dec 11 19:35:53 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Double Bazooka
Date: 8 Dec 1996 14:48:20 GMT
Organization: AOL http://www.aol.com
Lines: 21
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]
X-Newsreader: AOL Offline Reader

In article <[e-mail]>, "John Bates, Jr." <[e-mail]>
writes:

>I have used this type of antenna for 80 and 40 since 1977. I designed
>mine from the ARRL Handbook Dtd 1976 page 599. The original antenna
>was designed by M.I.T. for radar use. This antenna uses 300 ohm ladder
>line on the ends.
>
>John - KB0UY

The Ham antenna looks nothing like the original MIT radar antenna.

The stub effect of the conventional Ham coaxial cable bazooka antenna is
about zero. The bandwidth comes from increased loss (due to the woven
shield and dielectric losses) and the thicker than a typical #14 wire
element.

A bow tie type antenna actually has more BW and less loss than the messed
up bazooka design made popular with Hams.

73 Tom


From [e-mail] Wed Dec 11 19:35:54 1996
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From: [e-mail] (W6KKT Jesse)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Double Bazooka
Date: Sun, 08 Dec 1996 16:24:50 GMT
Organization: Microserve Information Systems (800)-380-INET
Lines: 38
Distribution: world
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]> <[e-mail]>
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X-Newsreader: Forte Agent .99e/16.227

On Sat, 07 Dec 1996 08:00:25 -0800, "Matthew A. Erickson"
<[e-mail]> wrote:

>John Bates, Jr. wrote:
>>
>> James Lee Tabor wrote:
>> >
>> > Hi,
>> >
>> > The International Antenna Corps Double Bazooka? Anyone used this
>> > antenna?
>> >
>> > There is a write up in Dec CQ, but it doesn't say much about how
>> > well it works. The antenna looks interesting. Being commercially
>> > manufactured, it supposably overcomes the weaknesses of homebrew
>> > antennas of the same type. ie; mechanical weakness.
>> >
>> > Thanks,
>> > Jim - ku5s
>> > --
>> > Communications Analysis Prediction Wizard
>> > http://www.wtrt.net/~ku5s/
>> > CAPMan HF Propagation Prediction & System Analysis Software
>> > http://ourworld.compuserve.com/homepages/KU5S
>>
>> I have used this type of antenna for 80 and 40 since 1977. I designed
>> mine from the ARRL Handbook Dtd 1976 page 599. The original antenna
>> was designed by M.I.T. for radar use. This antenna uses 300 ohm ladder
>> line on the ends.
>>
>> John - KB0UY
>I use one of these antennas for 80mtrs, it's made of all RG-58U coax,
>including the feed line. It's a very broad bandwidth, and show abit of
>gain over a dipole, about 2db, truly a excellent antenna.

Matthew, how did you do measure the 2db gain over the dipole?
And, how do you account for this gain?
Jesse, W6KKT


From [e-mail] Wed Dec 11 19:35:55 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Double Bazooka
Date: 9 Dec 1996 01:07:14 GMT
Organization: AOL http://www.aol.com
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Hi Tom--

I think you're saying that the Q is increased from the resistive loss
contribution. Exactly how much do you think this loss is? Do you feel that
there is no time that one would choose a double-B over a bowtie?

Also, for those who haven't seen the original, it might be edifying for
you to describe it so hams can note the differences for themselves.

73
Chip N1IR


From [e-mail] Wed Dec 11 19:35:55 1996
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From: [e-mail] (david l. thompson)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Double Bazooka
Date: Mon, 09 Dec 1996 02:36:21 GMT
Organization: MindSpring Enterprises, Inc.
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I agree with Tom W8JI about the cost of dipoles.  If one wants a broad
band antenna with the same efficiency of a dipole the bowtie or even
better, the cage is the way to go.  Several members of the
Southeastern Dx Club have used cage antennas for 80/75 to allow
coverage of both CW 3.5 to 3.575 and SSB 3.75 to 3.84.

The key is to get any dipole type antenna up at least 1/4 wave.  1/2
wave is even better for DX.  There is NO GAIN, but the higher dipole
hits the right radiation angle for DX.

73, Dave K4JRB



From [e-mail] Wed Dec 11 19:35:57 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Double Bazooka
Date: 8 Dec 1996 18:24:57 GMT
Organization: AOL http://www.aol.com
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>I use one of these antennas for 80mtrs, it's made of all RG-58U coax,
>including the feed line. It's a very broad bandwidth, and show abit of
>gain over a dipole, about 2db, truly a excellent antenna.

The bazooka has NO gain over a regular dipole. The Bazooka actually has
slightly more loss.

Reflections (Walt Maxwell) and Frank Witt cover this subject very well.

73 Tom


From [e-mail] Wed Dec 11 19:35:58 1996
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From: [e-mail] (Dan K6MHE)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Double Bazooka
Date: Tue, 10 Dec 1996 01:10:08 GMT
Organization: Mendocino Community Network
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On Sat, 07 Dec 1996 08:00:25 -0800, "Matthew A. Erickson"
<[e-mail]> wrote:


>I use one of these antennas for 80mtrs, it's made of all RG-58U coax,
>including the feed line. It's a very broad bandwidth, and show abit of
>gain over a dipole, about 2db, truly a excellent antenna.
>
>
Interesting, how did you measure the 2db gain?

How does a ╜-wave dipole have gain over a ╜-wave dipole?

Danny, K6MHE




From [e-mail] Wed Dec 11 19:35:58 1996
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From: Tony Seaton <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Double Bazooka
Date: Tue, 10 Dec 1996 13:29:34 -0500
Organization: Turner B'cst Sys
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To: [e-mail]

[e-mail] wrote:
>
> >I use one of these antennas for 80mtrs.
.. broad bandwidth, a. abit of
> >gain over a dipole, about 2db, truly a excellent antenna.
>
> The bazooka has NO gain over a regular dipole. The Bazooka actually has
> slightly more loss.
>
.
>
> 73 Tom

The DB is a "Feel Good " antenna that works much like the carnival "Sell
Game."For a thorough analysis of this ant. see Aug.1976 issue of Ham
Radio "A Revealing Analysis of the Coaxial Dipole Antenna" by Walt
Maxwell.Anyone wishing a copy of this 14 page article e-mail me for
details.

Tony W4SX


From [e-mail] Wed Dec 11 19:36:00 1996
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From: [e-mail] (Chris Selwyn-Smith)
Newsgroups: rec.radio.amateur.antenna
Subject: earth plane suggestions ?
Date: Sat, 07 Dec 1996 09:05:07 GMT
Organization: Landscape Services
Lines: 18
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Reply-To: [e-mail]
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Hi

I operate on vhf from a house boat this means that not only am I
sitting in water but that I have a 50 ft by 10 ft steel ground plane
under me.

Has any one got ideas on how best to utilize this to improve my
station.

Electrolisis is a concern.

Thanks

Chris

Chris Selwyn-Smith   Landscape Services
       [e-mail]
    G1RQZ                Hampton Court


From [e-mail] Wed Dec 11 19:36:02 1996
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From: [e-mail] (Maarten van Damme)
Newsgroups: rec.radio.amateur.antenna
Subject: Effect Wire antennas close together!
Date: Mon, 02 Dec 1996 21:27:38 GMT
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Posted to: rec.radio.shortwave and rec.radio.amateur.antenna

Hello all antenna lovers!

First I have to introduce my terrible antenna situation.
I am living in a row of wooden frame houses with a stamp garden at the
back and at the front. The municipality has a strict antenna policy,
but no-one seems to care (CB antennas, dishes etc.). Also for
esthetical reasons I can and will not have a big antenna on the roof.
I make do now with a dipole and a longwire with MLB in the attic.
The longwire is 12+ metres long and does not fit the six or seven
metres of the attic. What I did is fold it back. It is like a
horizontal and very long V. The MLB at one end connected to Aircell 7
coax, all hung on insulators.
On a HAM fair I bought this 27 Mhz dipole (actually CB dipole).
Because it was cheap and I could never receive anything in the 26-30
MHz I hoped to either improve reception with it (AND it did fit the
attic without compromising when hanging it up, lentgh is about 5
metres) or if it was too 'peaked', use the expensive 1:1 balun and
experiment with different lengths of litze.

Because of the lack of space I hung this Dipole a bit lower (50
centimetres) but under the 'v' longwire antenna. CB came in very well
on my Kenwood R-5000 (much improvement over the longwire). Take note,
I tested the dipole on the frequencies it was made for, adjustments
for 28 Mhz will be made later... (you know why ;-) )

When I used the longwire with the dipole in place nothing could be
heard anymore apart from the strongest stations and HAM operators.
Noise was terrible. When I removed the dipole everything was back to
normal. It was amazing how pieces of wire influence eachother when
close apart. I would not have expected such a dramatic result!

I also have some questions about this topic.
1. at what distance do these interactions between antennas disappear?
2. Does the height of both antennas have to do with this effect?
3. What if they were hung outdoors in more ideal circumstances than on
an attic. Same results?
4. Is just above the (flat) roof (wood) of the house always better
than indoors, despite the noise levels extending up to several metres
around the building?
5. My alternative horizontal V with both wires at the same height is
working rather well under the circumstances. Could I improve by using
an alternate setup given the space limitations 6 metres long attic,
two metres wide, 2.50 metres high?
6. How is the height of a wire antenna expressed when hanging in a
wooden house. If its height above the ground is 8 metres, but in the
house, could you say the height of the antenna is 8 metres or is this
only in free space?


Thanks,


Maarten van Damme
[e-mail]



From [e-mail] Wed Dec 11 19:36:02 1996
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From: "T. Pridgen" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: End-Fed Wire Ant
Date: 5 Dec 1996 18:19:33 GMT
Organization: SST
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Looking for construction plans for an end-fed wire antenna capable of
covering the ham band. Would like to hear you pros and cons and experiences
with this type of antenna.
Please respond to my Email address.
73, KC4YTF
Email: [e-mail]


From [e-mail] Wed Dec 11 19:36:03 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: End-Fed Wire Ant
Date: 7 Dec 1996 01:26:54 GMT
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My experiences with an "end fed-wire" from an MFJ tuner:

Fried fingers, keyer misfires, crazy SWR, flickering lights, TVI, and no
QSO's.  A very unpleasant voltage point develops at the rig end of the
equation. Even at the relatively meager power level of100 watts, I've
watched #12 insulated wire go up in smoke when it accidentally shorted on
a metal window screen. I am convinced that the whole random wire deal is
trouble with a capital T ----unless you are able to ground it properly
---i.e.; bury a a mile-square network of copper rods several hundred feet
into a salt water marsh.  Even then I'd be careful....

-jt-


From [e-mail] Wed Dec 11 19:36:04 1996
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From: "Cecil A. Moore" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: End-Fed Wire Ant
Date: Sat, 07 Dec 1996 20:34:37 -0700
Organization: Delphi Internet Services Corporation
Lines: 11
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References: <01bbe2d7$8ab53cc0$026be2cf@pridgent> <[e-mail]>
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[e-mail] wrote:
> My experiences with an "end fed-wire" from an MFJ tuner:
> Fried fingers, keyer misfires, crazy SWR, flickering lights, TVI, and no
> QSO's.

There is an extremely easy way to cure the problem. Bring another wire
back from the end of the longwire so the additional wire forms two sides
of a triangle and, like magic, one has a loop (full-wave) that will
virtually eliminate RF in the shack.

73, Cecil, W6RCA, OOTC


From [e-mail] Wed Dec 11 19:36:05 1996
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From: [e-mail] (Barry Anderson)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: End-Fed Wire Ant
Date: Sun, 8 Dec 1996 15:52:31 -0500
Organization: Anderson Desktop Publishing
Lines: 27
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In article <01bbe2d7$8ab53cc0$026be2cf@pridgent>, [e-mail]
says...
> Looking for construction plans for an end-fed wire antenna capable of
> covering the ham band. Would like to hear you pros and cons and experiences
> with this type of antenna.
> Please respond to my Email address.
> 73, KC4YTF
> Email: [e-mail]
>

I used one of these wires a few years ago with tremendous results. I was
running a KW to it. On 20 meters, I consistantly beat out the guys with
beams in the right direction. Mine was 300' of wire at 25' height. I
brought it in through the window through a fiber glass arrow shaft and
tuned it with an antenna tuner. I had lots of RF in the shack until I
installed a counterpoise. For this I ran 100' of hookup wire out the
window and held it off the ground, about 1 foot, with small stakes. I
tuned it with an MFJ ground tuner. It snaked around the house foundation.
WORKED GREAT!!!

    HOWEVER, the fiber glass arrow shaft broke down when it got wet.
There are voltage nodes that can form on the station end of the wire.
Make sure you come into the shack very carefully.
--
Barry Anderson K3SUI
Frederick, MD.
[e-mail]


From [e-mail] Wed Dec 11 19:36:07 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: End-Fed Wire Ant
Date: 9 Dec 1996 21:09:18 GMT
Organization: AOL http://www.aol.com
Lines: 27
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References: <[e-mail]>
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Hi Bob,
   Just a couple of thoughts...
   I've been fascinated by random wires for years because they're so
versatile.  I've  tried at least 8 or 10 different configurations and have
had good results with all of them.  They're really easy and fun to
experiment with.
   After you install the antenna wire itself, then for each band you want
to work, cut one radial wire a quarter wave long.  Attach one end of this
wire to the ground side of the tuner.  Run the ohter end of the radial
anywhere--along the floor, outside the window along the ground, etc.  The
only cautions are:(1) don't let the far end of the radial wire actually
touch the ground, because it'll ruin the resonance, and (2) be aware that
pets and kids CAN get an rf burn from this open end of the wire.  Put some
tape or something else to seal it off.  This 1/4 wave radial should almost
entirely cure your "rf in the shack" and also any TVI problems.
   One of my ham radio heroes is Howie Bradley who worked 'way over 300
countries with a 204 foot random wire while running only 20 watts !!!  As
I mentioned, I've had strong, regular QSO's, and I never run more than 5
watts.
If you run into problems, e-mail me directly, and I'll be happy to send
you some hardcopy references from the various antenna books I have lying
around.
   Try a random wire for yourself, and see what you think !  Good Luck !
Best 73's,
Tommy
KI7KH



From [e-mail] Wed Dec 11 19:36:08 1996
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From: [e-mail] (bob puharic)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Experience w/MFJ 2m Antennas?
Date: Wed, 04 Dec 1996 10:57:51 GMT
Organization: ENTER.NET
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[e-mail] (James Rimmer) wrote:

>Hi All!
>Anyone have any experience with either the MFJ-1750 2m 5/8 wave Ground Plane
>for base transmitting and/or experience with the MFJ-1738 glass mount 2m
>mobile antenna? I'm a new ham on a tight budget and these seem to be good
>values, however I have not been able to find anyone with first hand knowledge

>of these two antennas. Also what is the quality of MFJ products in general?
>TIA for any help and/or suggestions!
>James
>

i sit on a 600' hill here in e. pa ...many valley stations use mine as
a node or digipeater (cover abt 50 mile radius)...my mfj 5/8 antenna's
been up for 4 yrs in 60 mph winds...and the little bastard works like
a champ. best 20 bux i ever spent.



From [e-mail] Wed Dec 11 19:36:09 1996
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From: [e-mail] (James Rimmer)
Newsgroups: rec.radio.amateur.antenna
Subject: Experience w/MFJ 2m Antennas?
Date: Wed, 4 Dec 1996 01:47:36 GMT
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Lines: 17
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Hi All!
Anyone have any experience with either the MFJ-1750 2m 5/8 wave Ground Plane
for base transmitting and/or experience with the MFJ-1738 glass mount 2m
mobile antenna? I'm a new ham on a tight budget and these seem to be good
values, however I have not been able to find anyone with first hand knowledge
of these two antennas. Also what is the quality of MFJ products in general?
TIA for any help and/or suggestions!
James


Coming to you from a mind on
         THE RIM            ^^^^^^^^^^^^^   KF4NJL   ^^^^^^^^^^^^^^^^
         o                   Perpetual Student of the Earth Sciences
        <^-/  MtnBikIt!     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
      (*)/(*)                            James Rimmer




From [e-mail] Wed Dec 11 19:36:11 1996
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From: [e-mail] (Dale Wentz)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Experience w/MFJ 2m Antennas?
Date: 8 Dec 1996 01:07:55 GMT
Organization: Midwest Computer Services
Lines: 35
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I have 3 of them and they are ugly but work excelent. In fact about 6 months
ago we where having problems with our 2 Meter repeater antenna and it was
replaced by one of these little antennas. The reports coming from all the
local ARES/RACES stations was great, we could not beleive it. It was replaced
with a higher gain antenna after the problem was found, but we now keep one
on hand for the repeater if we ever need it,

The only problem I have had was that the screws get loose on the ground plane
radials, after it is assembled put a drop of lock tite or super glue on them,
Mine have been up for 2 years, here on packet with out a problem.


73's de KB9JJA/Dale


In article <[e-mail]>, [e-mail] says...
>
>Hi All!
>Anyone have any experience with either the MFJ-1750 2m 5/8 wave Ground Plane
>for base transmitting and/or experience with the MFJ-1738 glass mount 2m
>mobile antenna? I'm a new ham on a tight budget and these seem to be good
>values, however I have not been able to find anyone with first hand knowledge

>of these two antennas. Also what is the quality of MFJ products in general?
>TIA for any help and/or suggestions!
>James
>
>
>Coming to you from a mind on
>         THE RIM            ^^^^^^^^^^^^^   KF4NJL   ^^^^^^^^^^^^^^^^
>         o                   Perpetual Student of the Earth Sciences
>        <^-/  MtnBikIt!     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>      (*)/(*)                            James Rimmer
>
>



From [e-mail] Wed Dec 11 19:36:12 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.net!news.idt.net!feed1.news.erols.com!howland.erols.net!news-peer.gsl.net!news.gsl.net!portc01.blue.aol.com!audrey01.news.aol.com!not-for-mail
From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: EZNEC model
Date: 2 Dec 1996 02:49:03 GMT
Organization: America Online, Inc. (1-800-827-6364) (1.13)
Lines: 13
Message-ID: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]
X-Newsreader: AOL Offline Reader

I've been trying to model a "half-wave over quarter wave" vertical
colinear like the one in Chapter 16 of Paul Lee's Vertical Antenna
Handbook.  I'm not having much luck.
The antenna uses vertical wires, quarter wave long, attached to the middle
of the upper half wave section, and left open at the bottom.  These are
supposed to act as a sleeve, and provide the phase shift needed in the top
section.   I'm getting the same result whether or not I use the wires.  I
guess it's possible I'm doing it right, and the wires really don't have
any effect, but I doubt that.  Can anyone help me on how to model this
antenna, either with the wires, or with a solid sleeve?  I'm thinking
about building this antenna for 20 meters.  Thanks.

                                                            Steve W9HJW


From [e-mail] Wed Dec 11 19:36:12 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!news.voicenet.com!netaxs.com!tezcat!news.bbnplanet.com!cam-news-hub1.bbnplanet.com!news.idt.net!cdc2.cdc.net!newsfeed.concentric.net!news-master!news
From: "Dan Marsh" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.boatanchors,rec.radio.amateur.equipment,rec.radio.amateur.misc,rpi.union.ham-radio
Subject: FOR SALE 2 meter handheld, kpc-3 paket terminal, power supply, beam antenna, and rotor
Date: 5 Dec 1996 00:10:17 GMT
Organization: Dell Computer Corporation
Lines: 15
Message-ID: <01bbe240$730c7080$2aa1adce@holden>
NNTP-Posting-Host: cnc096042.concentric.net
X-Newsreader: Microsoft Internet News 4.70.1155
Xref: news1.epix.net rec.radio.amateur.antenna:32393 rec.radio.amateur.boatanchors:888 rec.radio.amateur.equipment:43650 rec.radio.amateur.misc:119669

I have a radio shack htx 202 2 meter handheld, a kpc-3 paket terminal, a
12v 2 amp power supply, a 2 meter beam, and a rotor for sale. I am asking
$260 or best offer for the whole thing, or you can haggle for any of the
items individually. They are all in good working order with a minimum of
wear and tear. The handheld's keys are worn and the case has some
scratches, but everything works well. I have all the original packaging and
manuals as well.

Thanx :~)

Dan Marsh --- KB7TAU

Email me at [e-mail] if you are interested.




From [e-mail] Wed Dec 11 19:36:13 1996
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.equipment,rec.radio.amateur.misc,su.org.ham-radio
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!usenet.eel.ufl.edu!arclight.uoregon.edu!feed1.news.erols.com!howland.erols.net!netcom.com!gvs
From: [e-mail] (Gary)
Subject: ForSale: Kwd TS450SAT, Astron RS-20A P/S, Timewave DSP-59+, Multibd invtd-V/telescpg-mast/coax Ant.
Content-Type: text/plain; charset=us-ascii
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Xref: news1.epix.net rec.radio.amateur.antenna:32411 rec.radio.amateur.equipment:43696 rec.radio.amateur.misc:119742 su.org.ham-radio:370

Sale In Silicon Valley Area:

For Sale:(All equipment almost new, asking $1500
for all, but will sell individually).  Hate to
sale HF ham shack, but between jobs :-{

    *Kenwood TS450SAT: ($1100)
    (Including addition accessories installed)
      -High Stability Osc.,TCXO UNIT,Model SO-2
      -SSB narrow filter, YK88SN-1, 1.8kHz

    *Astron RS-20A Power Supply ($75)
    (perfect match for TS450SAT)

    *Timewave DSP-59+ ($200)

    *Multi-band Inv-V/Dipole Ant. System ($250)
      -Alpha Delta DX-CC, a no trap 10 thru 80
       meter, Dipole Antenna
      -37 foot Telescoping Mast, material is
       schedule 80 PVC Tubing, in 4 sections,
       with O.D's: 3.50", 2.75", 2.25", and 1.75".
       Complete with all clamps, eye-bolt
       (guy points), hardware and marine nylon
       rope.  More durable than Steel Masts in
       a wind storm when guyed properly.  Also,
       much better ground isolation.
      -100 feet of RG-213/U coax.
      -Bencher YA-1 Low Pass Filter, 50/52 ohm


From [e-mail] Wed Dec 11 19:36:14 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!news.sprintlink.net!news-pull.sprintlink.net!news.sprintlink.net!news-dc-10.sprintlink.net!news-dc.gsl.net!news.gsl.net!news.sprintlink.co.za!osprey.global.co.za!news
From: [e-mail] (Phil)
Newsgroups: alt.radio.uk,rec.radio.amateur.antenna,rec.radio.amateur.equipment,rec.radio.amateur.misc
Subject: FS.  Portable Antenna Analyzer,   7MHz to  510MHz SWR direct
Date: Mon, 02 Dec 1996 19:48:47 GMT
Organization: Global Internet Access
Lines: 11
Message-ID: <57vq7c$[e-mail]>
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X-Newsreader: Forte Free Agent v0.55
Xref: news1.epix.net alt.radio.uk:9432 rec.radio.amateur.antenna:32305 rec.radio.amateur.equipment:43489 rec.radio.amateur.misc:119430

I have a portable Antenna Analyzer for sale.
It is a portable unit run from NiCad batteries with charger. It uses a LCD 4
digit frequency counter, an analogue SWR / %reflected power scales read direct
.
No radio Transmitter needed. It sees exactly what the radio sees.
Only R2495-00. New, under guarantee.
Ideal for the antenna experimenter.

Call Rob @ [phone]              [phone]   South Africa
(Johannesburg)
or Email [e-mail]



From [e-mail] Wed Dec 11 19:36:15 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!news.sprintlink.net!news-hub.sprintlink.net!news.sprintlink.net!news-peer.sprintlink.net!howland.erols.net!feed1.news.erols.com!news.dra.com!news.he.net!nntp.iccom.com!news.rain.net!hevanet.com!usenet
From: miker <[e-mail]>
Newsgroups: alt.radio.uk,rec.radio.amateur.antenna,rec.radio.amateur.equipment,rec.radio.amateur.misc
Subject: Re: FS.  Portable Antenna Analyzer,   7MHz to  510MHz SWR direct
Date: Tue, 03 Dec 1996 14:21:57 -0800
Organization: Hevanet Communications
Lines: 15
Message-ID: <[e-mail]>
References: <57vq7c$[e-mail]>
Reply-To: [e-mail]
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Phil wrote:
>
> I have a portable Antenna Analyzer for sale.
> It is a portable unit run from NiCad batteries with charger. It uses a LCD 4
> digit frequency counter, an analogue SWR / %reflected power scales read dire
ct.
> No radio Transmitter needed. It sees exactly what the radio sees.
> Only R2495-00. New, under guarantee.
> Ideal for the antenna experimenter.
>
> Call Rob @ [phone]              [phone]   South Africa
> (Johannesburg)
> or Email [e-mail]


What's that in US$?


From [e-mail] Wed Dec 11 19:36:16 1996
From: [e-mail]
Subject: Re: FS.  Portable Antenna Analyzer,   7MHz to  510MHz SWR direct
Newsgroups: rec.radio.amateur.antenna
X-User-Info: 207.105.2.133 207.105.2.133
References: <[e-mail]>
NNTP-Posting-Host: 206.103.128.4
Message-ID: <32a83f4f.0@206.103.128.3>
Date: 6 Dec 96 15:44:15 GMT
Lines: 17
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!newsfeed.internetmci.com!206.103.128.3!206.103.128.4

miker  wrote:>Phil wrote:
>>
>> I have a portable Antenna Analyzer for sale.
>> It is a portable unit run from NiCad batteries with charger. It uses a LCD
4
>> digit frequency counter, an analogue SWR / %reflected power scales read dir
ect.
>> No radio Transmitter needed. It sees exactly what the radio sees.
>> Only R2495-00. New, under guarantee.
>> Ideal for the antenna experimenter.
>>
>> Call Rob @ [phone]              [phone]   South Africa
>> (Johannesburg)
>> or Email [e-mail]
>
>
>What's that in US$?

I agree...could I have the US Cost


From [e-mail] Wed Dec 11 19:36:17 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!cs.utexas.edu!news.cs.utah.edu!cc.usu.edu!slmzc
From: [e-mail]
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.equipment,rec.radio.amateur.misc
Subject: Re: FS.  Portable Antenna Analyzer,   7MHz to  510MHz SWR direct
Message-ID: <[e-mail]>
Date: 6 Dec 96 14:03:47 MDT
References: <57vq7c$[e-mail]> <[e-mail]>
Organization: Utah State University
Lines: 21
Xref: news1.epix.net rec.radio.amateur.antenna:32440 rec.radio.amateur.equipment:43757 rec.radio.amateur.misc:119831

In article <[e-mail]>, miker <[e-mail]> writes:
> Phil wrote:
>>
>> I have a portable Antenna Analyzer for sale.
>> It is a portable unit run from NiCad batteries with charger. It uses a LCD
4
>> digit frequency counter, an analogue SWR / %reflected power scales read dir
ect.
>> No radio Transmitter needed. It sees exactly what the radio sees.
>> Only R2495-00. New, under guarantee.
>> Ideal for the antenna experimenter.
>>
>> Call Rob @ [phone]              [phone]   South Africa
>> (Johannesburg)
>> or Email [e-mail]
>
>
> What's that in US$?

Should be about $625.00   Current exchange is typically around R4.00/$

Paul, KB7VML
[e-mail]


From [e-mail] Wed Dec 11 19:36:18 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!news.sprintlink.net!news-pull.sprintlink.net!news.sprintlink.net!news-ana-24.sprintlink.net!news.sprintlink.net!news-hub.sprintlink.net!news.sprintlink.net!news-peer.sprintlink.net!worldnet.att.net!uunet!in3.uu.net!192.207.105.50!prodigy.com!usenet
From: [e-mail] (K Campbell)
Newsgroups: rec.radio.amateur.antenna
Subject: FS:  G5RV New Never Used
Date: 11 Dec 1996 03:16:00 GMT
Organization: Prodigy Services Company 1-800-PRODIGY
Lines: 8
Distribution: world
Message-ID: <58l91g$[e-mail]>
NNTP-Posting-Host: innugap2-int.news.prodigy.com
X-Newsreader: BBUsenet Version 1.0

Commercially built G5RV 160-10.  Excellent construction, made from
flexweave copper, comes with insulators, 73 feet of 450 Ladder Line.
Weatherproof.  204 feet long.  Great antenna, but wont fit on my lot.
should have bought the 80 meter version.  Still packaged from
manufacturer.  $45 and I will pay shipping.
Email to :  [e-mail]

K. Campbell


From [e-mail] Wed Dec 11 19:36:19 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!feed1.news.erols.com!news
From: "Samuel S. Yates" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: FS: AEA 6m Halo Ant.
Date: Sat, 07 Dec 1996 20:27:25 +0000
Organization: Erol's Internet Services
Lines: 17
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: war-as1s40.erols.com
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii; name="ic706.txt"
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.01 (Win95; I)
Content-Disposition: inline; filename="ic706.txt"

ICOM 706 Station including:
        IC-706 (Purchased new 16AUG96, never mobile)
        AT-180 Antenna Tuner 160m thru 6m
        FL-100 500Hz CW Crystal Filter
        OPC-581 Seperation Cable
        MB-62 Mobile Mount
        MB-63 Faceplate Mount
Total AES Price $1901.85. My price $1520.00 plus shipping.

Also have  AEA 6 Meter Halo Antenna, about one month old. AES cost
was $69.00, my price $55.00 plus shipping.

All equipment is in mint condition. E-mail me if interested. I am
located in Culpeper, Virginia (about 70 miles SW of Washington, DC).

Sam Yates, AB4N



From [e-mail] Wed Dec 11 19:36:20 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!demos!news.stealth.net!news.ibm.net.il!arclight.uoregon.edu!worldnet.att.net!feed1.news.erols.com!news
From: "Samuel S. Yates" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: FS: AEA 6m HALO Ant.
Date: Sat, 07 Dec 1996 21:39:10 +0000
Organization: Erol's Internet Services
Lines: 18
Message-ID: <[e-mail]>
NNTP-Posting-Host: war-as2s62.erols.com
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii; name="ic706.txt"
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.01 (Win95; I)
Content-Disposition: inline; filename="ic706.txt"

ICOM 706 Station including:
        IC-706 (Purchased new 16AUG96, never mobile)
        AT-180 Antenna Tuner 160m thru 6m
        FL-100 500Hz CW Crystal Filter
        OPC-581 Seperation Cable
        MB-62 Mobile Mount
        MB-63 Faceplate Mount
        MFJ 5383I Computer Interface Cable
Total AES Price $1951.80. My price $1560.00 plus shipping.

Also have  AEA 6 Meter Halo Antenna, about one month old. AES cost
was $69.00, my price $55.00 plus shipping.

All equipment is in mint condition. E-mail me if interested. I am
located in Culpeper, Virginia (about 70 miles SW of Washington, DC).

Sam Yates, AB4N



From [e-mail] Wed Dec 11 19:36:20 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.net!news.ibm.net.il!arclight.uoregon.edu!worldnet.att.net!feed1.news.erols.com!news
From: "Samuel S. Yates" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: FS: AEA 6M Halo Antenna
Date: Sat, 07 Dec 1996 23:18:24 +0000
Organization: Erol's Internet Services
Lines: 2
Message-ID: <[e-mail]>
NNTP-Posting-Host: war-as2s03.erols.com
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.01 (Win95; I)

One month old 6M Halo by AEA for sale for $55 + UPS. About one month
old. E-mail me if interested. 73's de AB4N in Culpeper, VA.


From [e-mail] Wed Dec 11 19:36:21 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.net!news.idt.net!feed1.news.erols.com!news
From: "Samuel S. Yates" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: FS: AEA 6M Halo Antenna
Date: Sun, 08 Dec 1996 21:16:24 +0000
Organization: Erol's Internet Services
Lines: 7
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: war-as1s06.erols.com
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.01 (Win95; I)

Samuel S. Yates wrote:
>
> One month old 6M Halo by AEA for sale for $55 + UPS. About one month
> old. E-mail me if interested. 73's de AB4N in Culpeper, VA.


THE HALO ANTENNA HAS BEEN SOLD.


From [e-mail] Wed Dec 11 19:36:22 1996
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!usenet.eel.ufl.edu!www.nntp.primenet.com!nntp.primenet.com!feed1.news.erols.com!news
From: "Samuel S. Yates" <[e-mail]>
Newsgroups: rec.ham-radio,rec.ham-radio.swap,rec.radio.amateur,rec.radio.amateur.antenna,rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.amateur.misc,rec.radio.amateur.swap
Subject: FS: ICOM 706
Date: Sat, 07 Dec 1996 20:24:50 +0000
Organization: Erol's Internet Services
Lines: 17
Message-ID: <[e-mail]>
References: <01bbe473$a4731cc0$281ae0c3@radioman>
NNTP-Posting-Host: war-as1s40.erols.com
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii; name="ic706.txt"
Content-Transfer-Encoding: 7bit
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Content-Disposition: inline; filename="ic706.txt"
Xref: news1.epix.net rec.ham-radio:2 rec.radio.amateur:8 rec.radio.amateur.antenna:32464 rec.radio.amateur.equipment:43809 rec.radio.amateur.homebrew:21822 rec.radio.amateur.misc:119927 rec.radio.amateur.swap:1

ICOM 706 Station including:
        IC-706 (Purchased new 16AUG96, never mobile)
        AT-180 Antenna Tuner 160m thru 6m
        FL-100 500Hz CW Crystal Filter
        OPC-581 Seperation Cable
        MB-62 Mobile Mount
        MB-63 Faceplate Mount
Total AES Price $1901.85. My price $1520.00 plus shipping.

Also have  AEA 6 Meter Halo Antenna, about one month old. AES cost
was $69.00, my price $55.00 plus shipping.

All equipment is in mint condition. E-mail me if interested. I am
located in Culpeper, Virginia (about 70 miles SW of Washington, DC).

Sam Yates, AB4N



From [e-mail] Wed Dec 11 19:36:23 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!news.kei.com!newsfeed.internetmci.com!howland.erols.net!cs.utexas.edu!news.ti.com!newsfeed.mc.ti.com!usenet
From: [e-mail] (Jim Flanders)
Newsgroups: rec.radio.amateur.antenna
Subject: Gamma matched J-Pole antenna
Date: 2 Dec 1996 17:42:04 GMT
Organization: Texas Instruments @ Sherman
Lines: 12
Message-ID: <57v4dc$[e-mail]>
NNTP-Posting-Host: shtip114.dseg.ti.com
Mime-Version: 1.0
Content-Type: Text/Plain; charset=US-ASCII
X-Newsreader: WinVN 0.99.7

While travelling this T-holiday, I was invited to stop and have an
eye-ball QSO with W8DRM (Bill) in Columbus.  He showed me a lot about
antennas in the short time I spent there.  One of the interesting
items was a gamma matched J-Pole.  He explained to me that by feeding
the coax ground at the center of the base, and by feeding the center
conductor to a gamma match that proceeded up the long section for about
19 inches, this gets rid of the non-symetrical currents.
   I hope I explained it correctly, and did not do Bill a diservice.
Bill sure impressed me and my wife.  Too bad I live so far away, I
could pick up a lot of knowledge from that guy.
   Jim W0oog/5



From [e-mail] Wed Dec 11 19:36:24 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.net!www.nntp.primenet.com!nntp.primenet.com!newspump.sol.net!howland.erols.net!newsfeed.internetmci.com!news.magg.net!news
From: "Dale R. Parfitt" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Gamma matched J-Pole antenna
Date: Tue, 03 Dec 1996 18:57:03 -0500
Organization: PAR Electronics
Lines: 17
Message-ID: <[e-mail]>
References: <57v4dc$[e-mail]>
NNTP-Posting-Host: wpb-126.magg.net
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 2.02 (Win95; I)
To: Jim Flanders <[e-mail]>

Jim Flanders wrote:
>
> While travelling this T-holiday, I was invited to stop and have an
> eye-ball QSO with W8DRM (Bill) in Columbus.  He showed me a lot about
> antennas in the short time I spent there.  One of the interesting
> items was a gamma matched J-Pole.  He explained to me that by feeding
> the coax ground at the center of the base, and by feeding the center
> conductor to a gamma match that proceeded up the long section for about
> 19 inches, this gets rid of the non-symetrical currents.
>    I hope I explained it correctly, and did not do Bill a diservice.
> Bill sure impressed me and my wife.  Too bad I live so far away, I
> could pick up a lot of knowledge from that guy.
>    Jim W0oog/5The gamma fed J pole is probably the only correct way to feed
the J and
reduce (not eliminate) feed and support radiation. Avanti Antennas
patented this idea back in the 70's.

Dale W4OP


From [e-mail] Wed Dec 11 19:36:24 1996
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!news-out.communique.net!demos!news.stealth.net!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!news-peer.gsl.net!news.gsl.net!portc01.blue.aol.com!newstf02.news.aol.com!audrey01.news.aol.com!not-for-mail
From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Gamma matched J-Pole antenna
Date: 6 Dec 1996 16:52:53 GMT
Organization: AOL http://www.aol.com
Lines: 15
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]
X-Newsreader: AOL Offline Reader

In article <[e-mail]>, "Dale R. Parfitt" <[e-mail]>
writes:

>The Ringos are half wave radiators fed w/ a parallel L-C tank. The Hi Z
>of the parallel tank matches the hi end impedance of the half wave
>radiator. The feed is then tapped up from ground at the 50 Ohm point.
>This is NOT a gamma match scheme.

And all of these systems, including the gamma matched J-pole, are equually
subject to feedline radiation unless radials are used. That's why
Cushcraft added decoupling in the later systems.

73 Tom




From [e-mail] Wed Dec 11 19:36:25 1996
Path: news1.epix.net!news3.epix.net!uunet!in3.uu.net!205.252.116.190!feed1.news.erols.com!howland.erols.net!news.sprintlink.net!news-peer.sprintlink.net!news.sprintlink.net!news-pull.sprintlink.net!news.sprintlink.net!news-pen-16.sprintlink.net!itnews.sc.intel.com!news.fm.intel.com!ornews.intel.com!news.jf.intel.com!jgarver
From: [e-mail] (Jim Garver)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Gamma matched J-Pole antenna
Date: 5 Dec 1996 17:44:51 GMT
Organization: Intel Corp., Hillsboro, Oregon
Lines: 21
Message-ID: <5871mj$[e-mail]>
References: <57v4dc$[e-mail]>
NNTP-Posting-Host: pdx804.intel.com

Jim Flanders <[e-mail]> wrote:
>... a gamma matched J-Pole.  He explained to me that by feeding
>the coax ground at the center of the base, and by feeding the center
>conductor to a gamma match that proceeded up the long section for about
>19 inches, this gets rid of the non-symetrical currents.

Actually, the Cushcraft Ringo family of antennas are really a
ring gamma-matched, end-fed, half wave vertical antenna.
An article in the May, 1971-73? Ham Radio Magazine explains it well.

I have used several Ringos and they work well for me.  To check for
feedline currents, attach a 1/4 wave length of wire to a pin and stick
it into the coax jacket at various places near the antenna base.  If
your SWR changes at some of the points, you have "non-symetrical currents".
Otherwise, you just have a bunch of pinholes in your coax.

Yo,


--
[e-mail]          K7YO        I don't speak for Intel


From [e-mail] Wed Dec 11 19:36:26 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Gamma matched J-Pole antenna
Date: Sat, 07 Dec 1996 05:07:11 GMT
Organization:
Lines: 15
Message-ID: <[e-mail]>
References: <57v4dc$[e-mail]> <5871mj$[e-mail]> <[e-mail]>
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>Jim Garver wrote:

>> I have used several Ringos and they work well for me.  To check for
>> feedline currents, attach a 1/4 wave length of wire to a pin and stick
>> it into the coax jacket at various places near the antenna base.  If
>> your SWR changes at some of the points, you have "non-symetrical currents".
>> Otherwise, you just have a bunch of pinholes in your coax.

I hope you didn't intend this as serious advice. It's good advice only
if you want to ruin a good length of coax cable.
--
73,
Butch N2YMJ


From [e-mail] Wed Dec 11 19:36:27 1996
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From: Bob Krueger <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: GAP Challenger DX VIII
Date: Sun, 01 Dec 1996 21:42:24 -0600
Organization: The DataXchange Network, Inc
Lines: 26
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I recently purchased a GAP Challenger DX VIII verticle. The antenna is
advertised as a broad banded verticle covering 80 - 10 meters as well
as 6 and 2 meters, it also boasts that it will operate over the
bandwidth of any of the bands with a VSWR not to exceed 2.1 at band
edges.

I assembled this antenna in my shop paying careful attention to follow
the assembly instructions to the letter, additionally, following
assembly, the antenna was checked for shorts and opens. I payed careful
attention to make sure that the feedline was long enough so as not to
appear as a radial to the antenna, I also made sure that the antenna
was located away from other objects and buildings to prevent coupling,
the required counterpoise wires were layed.

When I proceeded to check the bandwidth of the antenna on the various
bands for which it is designed, I was greatly disappointed to find that
the antenna exhibited very narrow bandwidth characteristics with a VSWR
that was either very near 2.1 or greater.

I would be interested in feedback, good or bad, from anyone who has
had experience with this antenna, perhaps I have overlooked some simple
magic, hi.

Bob, N9BKJ
[e-mail]



From [e-mail] Wed Dec 11 19:36:29 1996
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From: "Paul St. John" <#[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: GAP Challenger DX VIII
Date: Mon, 02 Dec 1996 21:36:11 -0800
Organization: Netcom
Lines: 35
Message-ID: <[e-mail]>
References: <[e-mail]>
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To: [e-mail]

Bob Krueger wrote:
>
> I recently purchased a GAP Challenger DX VIII verticle. The antenna is
> advertised as a broad banded verticle covering 80 - 10 meters as well
> as 6 and 2 meters, it also boasts that it will operate over the
> bandwidth of any of the bands with a VSWR not to exceed 2.1 at band
> edges.
>
> I assembled this antenna in my shop paying careful attention to follow
> the assembly instructions to the letter, additionally, following
> assembly, the antenna was checked for shorts and opens. I payed careful
> attention to make sure that the feedline was long enough so as not to
> appear as a radial to the antenna, I also made sure that the antenna
> was located away from other objects and buildings to prevent coupling,
> the required counterpoise wires were layed.
>
> When I proceeded to check the bandwidth of the antenna on the various
> bands for which it is designed, I was greatly disappointed to find that
> the antenna exhibited very narrow bandwidth characteristics with a VSWR
> that was either very near 2.1 or greater.
>
> I would be interested in feedback, good or bad, from anyone who has
> had experience with this antenna, perhaps I have overlooked some simple
> magic, hi.
>
> Bob, N9BKJ
> [e-mail]

Did you add the counterpoises?  I never had the problem you mention.  I
suggest calling the factory.  They were quite helpful.  It is a good
antenna for limited space.  I've worked a lot of serious DX with mine.
I found it produced almost no RFI/TVI, unlike a Butternut.  Something to
do with being a balanced load, I suspect.

- Paul, N6DN


From [e-mail] Wed Dec 11 19:36:30 1996
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From: [e-mail] (Jake Hellbach)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: GAP Challenger DX VIII
Date: Tue, 03 Dec 1996 15:48:45 GMT
Organization: MEPTEC - Mobil Oil Corporation
Lines: 32
Message-ID: <581i3o$[e-mail]>
References: <[e-mail]> <[e-mail]>
NNTP-Posting-Host: nolpc201.nol.mobil.com
X-Newsreader: Forte Free Agent 1.0.82

"Paul St. John" <#[e-mail]> wrote:

snip
>> I would be interested in feedback, good or bad, from anyone who has
>> had experience with this antenna, perhaps I have overlooked some simple
>> magic, hi.
>>
>> Bob, N9BKJ
>> [e-mail]

>Did you add the counterpoises?  I never had the problem you mention.  I
>suggest calling the factory.  They were quite helpful.  It is a good
>antenna for limited space.  I've worked a lot of serious DX with mine.
>I found it produced almost no RFI/TVI, unlike a Butternut.  Something to
>do with being a balanced load, I suspect.

>- Paul, N6DN

Well, I just bought the Butternut HF-6VX and set it up this weekend
and have some TVI problems. I was interested in the above comment, is
this the nature of the beast? Did I make a bad choice on buying the
butternut?

Thanks, Jake KK5HY
____________________________________________
email via: [e-mail]
AMI #832
Check out the Westside A.R.C. Web page at:
http://www.accesscom.net/~kk5hy
Updated with Boatanchor links!!!!!
____________________________________________



From [e-mail] Wed Dec 11 19:36:31 1996
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From: Gary Danaher <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: GAP Challenger DX VIII
Date: Tue, 03 Dec 1996 17:11:36 -0600
Organization: Flashnet Communications
Lines: 25
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]> <581i3o$[e-mail]>
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Jake Hellbach wrote:

> Well, I just bought the Butternut HF-6VX and set it up this weekend
> and have some TVI problems. I was interested in the above comment, is
> this the nature of the beast? Did I make a bad choice on buying the
> butternut?
>
> Thanks, Jake KK5HY
> ____________________________________________
> email via: [e-mail]
> AMI #832
> Check out the Westside A.R.C. Web page at:
> http://www.accesscom.net/~kk5hy
> Updated with Boatanchor links!!!!!
> ____________________________________________

I wouldn't say that you made a bad choice. Buttternuts are good
antennas. You are going to fing though that all ground mounted verticals
are going to generate some rfi problems for you due to their nature. I
used a Butternut for several years and with a ground radial system
consisting of about 120 tuned radials, it worked great on all
frequencies., but for me 40 and 80 were a little touchy. When it came
time to replace, I bought a Challenger. It's problem is in the 75/80
meter area--for dx it acts like a dummy load, and changing tuning
frequency on 80 requires taking the antenna down. Nothing is perfect.


From [e-mail] Wed Dec 11 19:36:33 1996
Path: news1.epix.net!news3.epix.net!uunet!in2.uu.net!131.126.10.76!news.dal.mobil.com!usenet
From: [e-mail] (Jake Hellbach)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: GAP Challenger DX VIII
Date: Thu, 05 Dec 1996 22:15:08 GMT
Organization: MEPTEC - Mobil Oil Corporation
Lines: 36
Message-ID: <587hg8$[e-mail]>
References: <[e-mail]> <[e-mail]> <581i3o$[e-mail]> <[e-mail]>
NNTP-Posting-Host: nolpc201.nol.mobil.com
X-Newsreader: Forte Free Agent 1.0.82

"Paul St. John" <#[e-mail]> wrote:

>Jake Hellbach wrote:
>> Well, I just bought the Butternut HF-6VX and set it up this weekend
>> and have some TVI problems. I was interested in the above comment, is
>> this the nature of the beast? Did I make a bad choice on buying the
>> butternut?
>>
>> Thanks, Jake KK5HY
>> ____________________________________________
>> ____________________________________________
>Interesting that I'm not the only one who had RFI problems with the
>Butternut.  I had mine at two locations, both about fifteen feet in the
>air.  The RFI was bad with both installations, despite a large number of
>radials.  It may have something to do with a low angle of radiation?
>But, then again, the GAP also has a low angle of radiation.  I wonder if
>a verticle dipole would have as many problems with RFI?

>- Paul, N6DN


Hi Paul,
Well my problem turned out not to be the antenna after all, It was my
using cheap coax jumpers on my TV to VCR installtion. I downloaded the
interference handbook from the FCC web site and followed it step by
step and found the problem in the TV coax.
This taught me a lesson about not to blame the antenna first!
Now I have no TVI. I'm happy, the wife is happy and life is good.
____________________________________________
email via: [e-mail]
AMI #832
Check out the Westside A.R.C. Web page at:
http://www.accesscom.net/~kk5hy
Updated with Boatanchor links!!!!!
____________________________________________



From [e-mail] Wed Dec 11 19:36:34 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!newsfeed.internetmci.com!uunet!in3.uu.net!205.229.32.19!lou.teclink.net!usenet
From: "Tom C. Brown, Jr." <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: GAP Challenger DX VIII
Date: Tue, 10 Dec 1996 15:11:40 -0600
Organization: Madison Materials Company
Lines: 39
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]> <581i3o$[e-mail]> <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: tc3_33.teclink.net
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To: #[e-mail]

Hi Paul-

I have had a GAP Challenger up for a little over three years, and it has
done quite a fine job during that time for me.

No repairs necessary, other than the yard cutters tearing up the radials
from time to time.

I did shorten the radials a little, and lengthen the 20 meter tuning
rod, to achieve a better match on 20 and 40 meters.  The tuning
adjustments have been very stable.

It's a really good antenna on 40 meters and 20 meters, and operates on
the others as claimed, but I have no real comparison data other than on
40 and 20.

In comparing the GAP to my R7 vertical on 20 meters and 40
meters......on one band there was about 1.25 dB difference, with the GAP
being stronger, and on the other band, there was absolutely no
difference.  I'd have to check my notes at home to see which was which,
but there isn't that much difference there anyhow.  The field strength
was measured a few miles distant, at virtually 0 degrees takeoff angle.

The GAP is a good antenna, and I'd recommend it to anyone wanting a
vertical with very good performance on 20 and 40, with coverage of the
other bands as well.  The main omission in the GAP, for me at least, is
the lack of 30 meter coverage.

One warning:  I know a fellow who has blown up the matching capacitor in
the top of the antenna more than once by running high power to it.  Not
necessarily the legal limit, but several hundred watts.  It is
apparently critical to keep within the antenna's 2:1 SWR bandwidth when
operating on 80 meters.  Unless you enjoy taking it down and replacing
that capacitor.... <g>

Good antenna, though.  I worked the Peter I expedition with mine, and
the pileup was UNbelieveable!

73, Tom KJ5IE


From [e-mail] Wed Dec 11 19:36:35 1996
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From: Peter and Colleen McGreevy <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: GAP Titan DX - Opinions???
Date: Mon, 02 Dec 1996 18:58:39 -0800
Organization: IDT
Lines: 11
Message-ID: <[e-mail]>
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Okay folks, after talking to a few people about my restrictive antenna
situation, I am getting ready to buy the GAP Titan DX.  It has NO
radials, (it does have four 80 inch "counterpoises," ok, pseudo-radials,
but they are self supporting).  People have given me good feedback on it,
 and I would like to solicit your opinions, good or bad, from experience
(best) or hearsay(take it for what its worth...)  I'm holding off the
purchase while I wait for replies.

Thanks, any info would be appreciated.

Pete -- KA2YDY


From [e-mail] Wed Dec 11 19:36:36 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: GAP Titan DX - Opinions???
Date: Mon, 02 Dec 1996 21:05:45 -0800
Organization: A customer of Pacific Bell Internet Services
Lines: 17
Message-ID: <[e-mail]>
References: <[e-mail]>
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To: Peter and Colleen McGreevy <[e-mail]>

Peter and Colleen McGreevy wrote:
>
> Okay folks, after talking to a few people about my restrictive antenna
> situation, I am getting ready to buy the GAP Titan DX.  It has NO
> radials, (it does have four 80 inch "counterpoises," ok, pseudo-radials,
> but they are self supporting).  People have given me good feedback on it,
>  and I would like to solicit your opinions, good or bad, from experience
> (best) or hearsay(take it for what its worth...)  I'm holding off the
> purchase while I wait for replies.
>
> Thanks, any info would be appreciated.
>
> Pete -- KA2YDYPete
You sound as bad as I was in buying the Gap Titan. Go ahead take the
plunge.
Lou
kb6ftt


From [e-mail] Wed Dec 11 19:36:38 1996
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From: "C. Edward Hetzler" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: GAP Titan DX - Opinions???
Date: 9 Dec 1996 01:27:39 GMT
Organization: Shore.Net/Eco Software, Inc; ([e-mail])
Lines: 24
Message-ID: <01bbe56f$9e456860$d665a7cc@Phetzlere>
References: <[e-mail]>
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I have a Gap Titan DX antenna that was install by a professional antenna
installer who also a ham. On 80 meters it does not receive well or transmit
well. Signal reports back to me were 33 and sent report were about the
same. It is tune fore 3.9 or higher with a SWR of 1.1 to 1.7 depending on
dry or wet conditions. Below 3.9 you must use a tuner to work the band.
As of December 8th the 40 meter counterpoise held up but with this snow
storm it just came down. The wire came off and one of the radial fell down.
It does not hold up in a wet, freezing snow storm like we just had. It also
does not come down to a low SWR when setup as we did it exactly like the
direction say. I had to use the tuner on the band but it does perform well
on 40 meters tune in.
On 20,15, and 10 meters it works excellent . Low SWR of 1.1 . CW bands you
must use a tuner.
Before we moved to Massachusetts I used a all bander wire antenna and had
no problems.
I am thinking of putting up an inverted Vee for 40 and80 meters so I can
work my favorite bands.
The Titan DX works fine on 10,15,and 20 meters but in snow 40 meters went
down and 80 does not transmit or receive well.
 Hope this helps as my has been up since July 1996.
 Carole - KD3FM
This is my husband email address any email to me please sent via
[e-mail]



From [e-mail] Wed Dec 11 19:36:39 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!news.sprintlink.net!news-pull.sprintlink.net!news.sprintlink.net!news-peer.sprintlink.net!howland.erols.net!newsfeed.internetmci.com!nntp.cntfl.com!usenet
From: [e-mail] (Hank Kahrs)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: GAP Voyager Antenna ... any good ???
Date: Mon, 02 Dec 1996 19:01:21 GMT
Organization: CMDS News machine
Lines: 32
Message-ID: <57v910$[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: 204.49.40.129
X-Newsreader: Forte Free Agent 1.0.82

[e-mail] (Barry Anderson) wrote:

>I live in a 3rd floor condo and use attic antennas on 40 meters. I have
>been thinking of installing an antenna at the XYL's mothers house in the
>country so I can do some real hamming on my favorite band (40 Meters).
>The GAP Voyager looks to be promising ... no radials ... and it's the
>biggest of all of the commercial verticals at 45'. Does anyone have any
>experience with this antenna or know of someone who does? Will it handle
>full legal power? Thanks for your response.
>--
>Barry Anderson K3SUI
>Frederick, MD. 21702
>[e-mail]

Barry,
I have a Gap Voyager.  While it is good on 40 and 80, its a dummy load
on 20 and not quite a dummy load on 160.  It performed quite well on
40 till I got the PRO-67B up (2 elm beam on 40).  I only use it now
when I need somethin off the back of the beam real quick.  Its my only
80 and 160 ant and will soon become an 80 meter only ant.  I have wrkd
DXCC on 80 with it so cant complain.  It does have 3 counterpoise
about 57 ft long...for installating purposes...these are radials.

Have fun...



73, Hank/K2UVG
[e-mail]
http://www.nfds.net/~nkahrs/k2uvg.html




From [e-mail] Wed Dec 11 19:36:40 1996
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Date: Sat, 07 Dec 1996 09:51:03 -0600
From: [e-mail]
Subject: Geting started in ham radio!
Newsgroups: rec.radio.amateur.equipment,rec.radio.amateur.antenna
Message-ID: <[e-mail]>
Reply-To: [e-mail]
Organization: Deja News Usenet Posting Service
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Lines: 16
Xref: news1.epix.net rec.radio.amateur.equipment:43786 rec.radio.amateur.antenna:32455

I just passed my technician exam and I would like to get started on 2m / 70 cm
.. Many books publish articles about what a beginner should get, but the opini
ons vary greatly.

I┤m interested in repeater, simplex, and packet work, maybe some SSTV. I
don┤t know if I should get a yagi or a groundlane antenna. What┤s the
best deal in my case? Are there any brands that can be
recommended?

What is a good transcheiver (dual band)? (with packet capability) I want
a mobile one, but with enough comfort so it can be operated in my home
to..

I would really apreciate your help,

73, Patrick
-------------------==== Posted via Deja News ====-----------------------
      http://www.dejanews.com/     Search, Read, Post to Usenet


From [e-mail] Wed Dec 11 19:36:40 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!news2.digex.net!news6.digex.net!news.gteais.com!news
From: aor <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Ground rod and rocks... Go Out, not down...
Date: Mon, 09 Dec 1996 19:45:37 -0500
Organization: gteais-org
Lines: 19
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: r1p2.gteais.com
Mime-Version: 1.0
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X-Mailer: Mozilla 3.01 (Win95; I)
To: Dan Walker <[e-mail]>

Dan,

You need not go down to achieve an earth ground, you can go out.  In
fact, a ground rod with radials is superior to just a driven ground
rod.  We have radial systems in our desert installations.  Going deep in
dry sand is useless.  I would suggest heavy copper radials (5-7) with
two of them running long 20-30 feet).  Bare solid copper.

Also remember that this is a DC ground only, not an AC ground.  You will
need to solve this differently is you get RF bites in the shack.

Now if the rocks are copper... then drill and tap !!!!  :-)


73 and good luck.

Al NW2M

http://www.dsport.com/marc/


From [e-mail] Wed Dec 11 19:36:41 1996
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From: [e-mail] (Dick Flanagan)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Ground rod and rocks... Go Out, not down...
Date: Tue, 10 Dec 1996 08:31:39 -0800
Organization: Libelle Productions, Inc., Minden, Nevada USA
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In article <[e-mail]>, aor <[e-mail]> wrote:

>Also remember that this is a DC ground only, not an AC ground.  You will
>need to solve this differently is you get RF bites in the shack.

Also remember that lightning is RF.
--
Dick Flanagan W6OLD CFII Minden, Nevada


From [e-mail] Wed Dec 11 19:36:42 1996
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From: Dan Walker <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Ground rod and rocks... HELP!
Date: Thu, 05 Dec 1996 13:13:40 -0800
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I need to drive in a ground rod, but the earth around my QTH has so
many rocks that it won't go in more than 18"

Anybody have any ideas?


From [e-mail] Wed Dec 11 19:36:43 1996
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From: [e-mail] (bob puharic)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Ground rod and rocks... HELP!
Date: Sat, 07 Dec 1996 06:59:58 GMT
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Dan Walker <[e-mail]> wrote:

>I need to drive in a ground rod, but the earth around my QTH has so
>many rocks that it won't go in more than 18"

>Anybody have any ideas?

i recall reading that the army lays out a line of ground stakes about
4' deep, with multiple rods...perhaps 3-4 on each leg.



From [e-mail] Wed Dec 11 19:36:44 1996
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From: [e-mail] (Bea and Marvin Jones)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Ground rod and rocks... HELP!
Date: 7 Dec 1996 17:50:01 GMT
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Dan Walker ([e-mail]) wrote:
: I need to drive in a ground rod, but the earth around my QTH has so
: many rocks that it won't go in more than 18"

Hi, Dan

I trick I use is to 'drill' a hole first...  Get a 'long enough'
section of conduit and attach a garden hose to one end.  I usually
use a short piece of old scrap hose and install a female connector
on its other end.  If you get the right size of hose, it'll slip
over the conduit when the end is pre-heated in a pan of boiling water.
Attach with worm-screw clamps.

Cut the other end of the conduit at a 45deg angle.

Wear already-dirty clothes.

Turn on the water full blast and ease the pipe into the ground.  As
you encounter rocks, jockey the pipe around and it'll flush out a big
enough pocket to accomodate both the pipe and the rock.

When you are done, you'll have a pretty sloppy hole for the ground rod.
Big deal...  Just spend a little time each day -- pouring a slurry of
mud and salt down around the rod in the hole.

73
Jonesy  W3DHJ
__
SK

--
Marvin Jones  [e-mail]
Gunnison, Colorado


From [e-mail] Wed Dec 11 19:36:45 1996
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From: "James E. Shea" <"[e-mail]"@inreach.com>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Ground rod and rocks... HELP!
Date: Sun, 08 Dec 1996 00:33:50 -0800
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Dan Walker wrote:
>
> I need to drive in a ground rod, but the earth around my QTH has so
> many rocks that it won't go in more than 18"
>
> Anybody have any ideas?

Handle is Jim - KB5FB.  I have found that purchasing a simple copper
connector that goes from water hose to 1/2" copper pipe with an elbow if
possible or add that too.  Get a 10 foot chunk of 1/2" copper pipe.  How
connect the hose to your connector.  Tape your connector to the copper
pipe and stand on a latter (have it supported as you will be moving
around a bit) and turn on the water.  Medium to light pressure is
generally enough.  The water will do the work.  Rotate the copper pipe
and you will generall find that it will go into the ground like hot knife
through butter.  If you have really solid packed rocky ground you might
have to soder the connector on the pipe and use high pressure.  Be
careful of one thing.  You can generally put a 10' pipe in the ground in
now time flat and even get too deep.  You can either remove the pipe and
put in your ground rod or I have even used the copper pipe with success.

Hope this help, and it really works great!

                                Jim - KB5FB

P.S.  This news group looke nice.  I'll check in again.


From [e-mail] Wed Dec 11 19:36:46 1996
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From: "James E. Shea" <"[e-mail]"@inreach.com>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Ground rod and rocks... HELP!
Date: Sun, 08 Dec 1996 00:48:47 -0800
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Dan Walker wrote:
>
> I need to drive in a ground rod, but the earth around my QTH has so
> many rocks that it won't go in more than 18"
>
> Anybody have any ideas?Handle is Jim - KB5FB
Try using a 1/2" x 10' chunk of copper pipe with a garden hose connector
at one end.  Light to medium presser will generally work ok.  Solder the
connector and use high pressure for real hard ground.  You can put in a
10' chunk of pipe in minutes all without a hammer.  Try it it works!

Hope this helps, Jim


From [e-mail] Wed Dec 11 19:36:47 1996
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From: "Peter Gottlieb" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Ground rod and rocks... HELP!
Date: 8 Dec 1996 20:40:13 GMT
Organization: Altopia Corp. - Affordable Usenet Access - http://www.alt.net
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Mike <[e-mail]> wrote in article <[e-mail]>...
> I ground the pointed end of a 1/2 inch ground rod to look like the end
> of a drill bit cutting edge. I then used a 1/2 inch drill to drive the
> rod into the ground. I know it sounds crazy, but it did work for me.


That won't work here...  mega granite bedrock...  construction requires
blasting
(outlawed recently) or heavy equipment with hydraulic hammers.  Our
neighbor
spent $40,000 to excavate for a small addition, and the rock was
IMPRESSIVE.
And, yes, everyone for blocks felt the vibrations!

...Peter



From [e-mail] Wed Dec 11 19:36:48 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Ground rod and rocks... HELP!
Date: 9 Dec 1996 01:59:56 GMT
Organization: DigiPhone Corporation, Bryan/College Station Texas 409-693-8885
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In <01bbe547$f65dc600$9b0f2399@peter-s>, "Peter Gottlieb" <peter_gottlieb@msn.
com> writes:
>Mike <[e-mail]> wrote in article <[e-mail]>...
>> I ground the pointed end of a 1/2 inch ground rod to look like the end
>> of a drill bit cutting edge. I then used a 1/2 inch drill to drive the
>> rod into the ground. I know it sounds crazy, but it did work for me.
>
>
>That won't work here...  mega granite bedrock...  construction requires
>blasting
>(outlawed recently) or heavy equipment with hydraulic hammers.  Our
>neighbor
>spent $40,000 to excavate for a small addition, and the rock was
>IMPRESSIVE.
>And, yes, everyone for blocks felt the vibrations!
>
>....Peter
>

Do the rabbits keep you up all night?

       :)

//-----------------------------
Mike - W5WQN
[e-mail]
[e-mail]



From [e-mail] Wed Dec 11 19:36:48 1996
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From: ernie <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Ground rod and rocks... HELP!
Date: Sun, 08 Dec 1996 23:24:48 -0800
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Dan Walker wrote:
>
> I need to drive in a ground rod, but the earth around my QTH has so
> many rocks that it won't go in more than 18"
>
> Anybody have any ideas?

Your question has produced a lot of complicated responces but why not
try
what I did.  I had the same problem, so I dug a small hole then drove
the rods in almost horizontal, no problems.     Good Luck   Ernie
(KE3VC)


From [e-mail] Wed Dec 11 19:36:50 1996
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From: "Peter Gottlieb" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Ground rod and rocks... HELP!
Date: 9 Dec 1996 01:53:03 GMT
Organization: Altopia Corp. - Affordable Usenet Access - http://www.alt.net
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[e-mail] wrote in article <58frqs$[e-mail]>...
>
> Do the rabbits keep you up all night?
>


No, but if you send over a bunny I'll bet she could keep me "up" all
night...

...Peter



From [e-mail] Wed Dec 11 19:36:51 1996
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From: Dan Walker <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Ground rod and rocks... HELP!
Date: Sun, 08 Dec 1996 10:02:44 -0800
Organization: Netcom
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James E. Shea wrote:
>
> Dan Walker wrote:
> >
> > I need to drive in a ground rod, but the earth around my QTH has so
> > many rocks that it won't go in more than 18"
> >
> > Anybody have any ideas?
>
> Handle is Jim - KB5FB.  I have found that purchasing a simple copper
> connector that goes from water hose to 1/2" copper pipe with an elbow if
> possible or add that too.  Get a 10 foot chunk of 1/2" copper pipe.  How
> connect the hose to your connector.  Tape your connector to the copper
> pipe and stand on a latter (have it supported as you will be moving
> around a bit) and turn on the water.  Medium to light pressure is
> generally enough.  The water will do the work.  Rotate the copper pipe
> and you will generall find that it will go into the ground like hot knife
> through butter.  If you have really solid packed rocky ground you might
> have to soder the connector on the pipe and use high pressure.  Be
> careful of one thing.  You can generally put a 10' pipe in the ground in
> now time flat and even get too deep.  You can either remove the pipe and
> put in your ground rod or I have even used the copper pipe with success.
>
> Hope this help, and it really works great!
>
>                                 Jim - KB5FB
>
> P.S.  This news group looke nice.  I'll check in again.


Thanks for the advice, Jim. I'm gonna try it!
I received several EMAILS about this technique.

This is a good newsgroup, I've gone all the way from novice to extra and
built my station with the help of these newsgroups

take care..


From [e-mail] Wed Dec 11 19:36:52 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Ground rod and rocks... HELP!
Date: Tue, 10 Dec 1996 05:04:00 GMT
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ernie <[e-mail]> wrote:

>Dan Walker wrote:
>>
>> I need to drive in a ground rod, but the earth around my QTH has so
>> many rocks that it won't go in more than 18"
>>
>> Anybody have any ideas?
>
>Your question has produced a lot of complicated responces but why not
>try
>what I did.  I had the same problem, so I dug a small hole then drove
>the rods in almost horizontal, no problems.     Good Luck   Ernie
>(KE3VC)

Digging a hole and burying a copper plate is another option.
--
73,
Butch N2YMJ


From [e-mail] Wed Dec 11 19:36:53 1996
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From: [e-mail] (Ed Gallup)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Ground rod and rocks... HELP!
Date: Wed, 11 Dec 96 09:33:47 GMT
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>>>
>>> I need to drive in a ground rod, but the earth around my QTH has so
>>> many rocks that it won't go in more than 18"
>>>


    Getting a good earth - copper bond is the question.  If you can't go deep,

use more copper and go shallow.  Get more than one rod,  clear the rocks as
you can and dig trenches as deep as you can go  (hopefully at least 12 - 18 ")

and lay the rods sideways in the trenches.  Bond  the rods together with a
heavy copper cable (cadwelding is best) and be sure to use a good lightning
arrester.  Polyphasor type is better than spark gap type.

  Ed  W7DXZ


From [e-mail] Wed Dec 11 19:36:54 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Ground rod and rocks... HELP!
Date: Wed, 11 Dec 96 15:38:40 GMT
Organization: MHVNet, the Mid Hudson Valley's Internet connection
Lines: 34
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X-Newsreader: News Xpress 2.0 Beta #0

In article <[e-mail]>, [e-mail] wrote:
>ernie <[e-mail]> wrote:
>
>>Dan Walker wrote:
>>>
>>> I need to drive in a ground rod, but the earth around my QTH has so
>>> many rocks that it won't go in more than 18"
>>>
>>> Anybody have any ideas?
>>
>>Your question has produced a lot of complicated responces but why not
>>try
>>what I did.  I had the same problem, so I dug a small hole then drove
>>the rods in almost horizontal, no problems.     Good Luck   Ernie
>>(KE3VC)
>
>Digging a hole and burying a copper plate is another option.
>--
>73,
>Butch N2YMJ

   My plan is to dig a trench about a foot or 2 deep then lay the rod
horizontally since I can not drive a rod any further than about 1-2 feet.
It's the only thing I can do. There are just too many rocks, boulders under my

property to go 8 feet vertically.

Tom


   Tom Randall            Amateur Radio - KB2SMS
   [e-mail]       Mt. Beacon Amateur Radio Club / ARRL / 10-10
                          Member: AAVSO Solar Division

   Opinions herein are mine and may not be that of MHV.NET!


From [e-mail] Wed Dec 11 19:36:55 1996
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From: [e-mail] (W T Shaw)
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.misc,alt.engineering.electrical
Subject: Re: Grounding system?
Date: 8 Dec 1996 00:50:43 GMT
Organization: Another Netscape News Server User
Lines: 48
Message-ID: <wtshaw-0712961957440001@207.17.188.148>
References: <[e-mail]>
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Xref: news1.epix.net rec.radio.amateur.antenna:32465 rec.radio.amateur.misc:119937 alt.engineering.electrical:9981

In article <[e-mail]>, [e-mail] wrot
e:

> I live on the 23 floor of a residential building and I┤m just starting
to set up an amateur radio station. I can┤t seem to find any information
on how to properly ground my equipment at that height. I know that the
grounding cable shouldn┤t be at the resonant frequency of the amateur
bands.
>
> What I did for now is I connected everything to the cold water pipe
> system. (It┤s grounded, I checked that). Is that ok? Or can "hot spots"
> develop?
>
> The other thing are the antennas. I connected a wire (AWG 4) between the
> mast of the antenna and the wires from the lightning protection system is
> that OK?
>
> I really don┤t know how I should solve the problem wot my station
> ground....
>
> I hope someone can help me out here :)

While it may sound like grounding is all important, you can choose a
totally ungrounded system through some sort of link coupling.  It's one of
the oldest techniques available to get rid of a DC path from your antenna
to your rig.  Broadcast people commonly use what is called an ISOCOUPLER
for the same purpose.  Torroids can do the job for low power if wound
correctly.  Feed line stubs can be configured to a multitude of these
chores too. You have lots of alternatives.  If you have an artificial
ground array on the roof, you can work an antenna that requires a ground
against that, and let it float at what ever potential it finds, but best
find a non-electrical wiring path to a ground.  Be careful in your design
so you can tell us in a while what you did.

Bill, k5pcw



Anything you can do to make lightning find a path other than through you
rig is the ticket.  Spark gaps also can help shunt the flow.  Best thing
is physically unplug the antenna from the rig when you are not using it.
>
>
> 73, Patrick
> -------------------==== Posted via Deja News ====-----------------------
>       http://www.dejanews.com/     Search, Read, Post to Usenet
--
WTShaw--MacCrypto Programmer--The Following is in FUDGE
Vxdpq qcqva gdocd pokch hx-wd ll/,i ?-wry vegee n/wvm rt/tb bh/nd xdtlv ..mi.
fzngq hj,zf dzvrb uy/xq njdzc ?=uGo me/gg gu??g /?wen --ueo een-g -p,ym ohvfg
njrjb ,=/nl kk?zi ky.-m po,cg omufg koy.m kkmyi po,dg db,lb /,plz nn=mu d.awq


From [e-mail] Wed Dec 11 19:36:58 1996
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Date: Sat, 07 Dec 1996 10:01:08 -0600
From: [e-mail]
Subject: Grounding system?
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.misc,alt.engineering.electrical
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I live on the 23 floor of a residential building and I┤m just starting to set
up an amateur radio station. I can┤t seem to find any information on how to pr
operly ground my equipment at that height. I know that the grounding cable sho
uldn┤t be at the resonant frequency of the amateur bands.

What I did for now is I connected everything to the cold water pipe
system. (It┤s grounded, I checked that). Is that ok? Or can "hot spots"
develop?

The other thing are the antennas. I connected a wire (AWG 4) between the
mast of the antenna and the wires from the lightning protection system is
that OK?

I really don┤t know how I should solve the problem wot my station
ground....

I hope someone can help me out here :)


73, Patrick
-------------------==== Posted via Deja News ====-----------------------
      http://www.dejanews.com/     Search, Read, Post to Usenet


From [e-mail] Wed Dec 11 19:36:59 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.misc,alt.engineering.electrical
Subject: Re: Grounding system?
Date: 9 Dec 1996 02:05:39 GMT
Organization: DigiPhone Corporation, Bryan/College Station Texas 409-693-8885
Lines: 68
Message-ID: <58fs5j$[e-mail]>
References: <[e-mail]> <wtshaw-0712961957440001@207.17.188.148>
Reply-To: [e-mail]
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Xref: news1.epix.net rec.radio.amateur.antenna:32519 rec.radio.amateur.misc:120066 alt.engineering.electrical:10008

In <wtshaw-0712961957440001@207.17.188.148>, [e-mail] (W T Shaw) writ
es:
>In article <[e-mail]>, [e-mail] wro
te:
>
>> I live on the 23 floor of a residential building and I┤m just starting
>to set up an amateur radio station. I can┤t seem to find any information
>on how to properly ground my equipment at that height. I know that the
>grounding cable shouldn┤t be at the resonant frequency of the amateur
>bands.
>>
>> What I did for now is I connected everything to the cold water pipe
>> system. (It┤s grounded, I checked that). Is that ok? Or can "hot spots"
>> develop?
>>
>> The other thing are the antennas. I connected a wire (AWG 4) between the
>> mast of the antenna and the wires from the lightning protection system is
>> that OK?
>>
>> I really don┤t know how I should solve the problem wot my station
>> ground....
>>
>> I hope someone can help me out here :)
>
>While it may sound like grounding is all important, you can choose a
>totally ungrounded system through some sort of link coupling.  It's one of
>the oldest techniques available to get rid of a DC path from your antenna
>to your rig.  Broadcast people commonly use what is called an ISOCOUPLER
>for the same purpose.  Torroids can do the job for low power if wound
>correctly.  Feed line stubs can be configured to a multitude of these
>chores too. You have lots of alternatives.  If you have an artificial
>ground array on the roof, you can work an antenna that requires a ground
>against that, and let it float at what ever potential it finds, but best
>find a non-electrical wiring path to a ground.  Be careful in your design
>so you can tell us in a while what you did.
>
>Bill, k5pcw
>
>
>
>Anything you can do to make lightning find a path other than through you
>rig is the ticket.  Spark gaps also can help shunt the flow.  Best thing
>is physically unplug the antenna from the rig when you are not using it.
>>
>>
>> 73, Patrick
>> -------------------==== Posted via Deja News ====-----------------------
>>       http://www.dejanews.com/     Search, Read, Post to Usenet
>--
>WTShaw--MacCrypto Programmer--The Following is in FUDGE
>Vxdpq qcqva gdocd pokch hx-wd ll/,i ?-wry vegee n/wvm rt/tb bh/nd xdtlv ..mi.
 fzngq hj,zf dzvrb uy/xq njdzc ?=uGo me/gg gu??g /?wen --ueo een-g -p,ym ohvfg
 njrjb ,=/nl kk?zi ky.-m po,cg omufg koy.m kkmyi po,dg db,lb /,plz nn=mu d.awq

The toroid deal is a fact..  However, if you ARE going to disconnect, get that

free end grounded!  Otherwise, you may have the distinct honor of one who
has seen ball lightning inside your shack!  Heck you can have it happen even
if it is grounded, just makes the possibility of a plasma induced fire a
little less likely...

    :)

Ask KC5DNE, Paul Sittler what it looks like.  Magnificent glowing orb that
blew into the room out at the Vet Department at A&M, hung there glowing
for a brief while, then exploded in front of him and scarred the &^%&^&
out of the poor feller....

//-----------------------------
Mike - W5WQN
[e-mail]
[e-mail]



From [e-mail] Wed Dec 11 19:37:00 1996
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From: "Peter Gottlieb" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.misc,alt.engineering.electrical
Subject: Re: Grounding system?
Date: 9 Dec 1996 01:56:16 GMT
Organization: Altopia Corp. - Affordable Usenet Access - http://www.alt.net
Lines: 12
Message-ID: <01bbe574$1d2ee440$f50f2399@peter-s>
References: <[e-mail]> <wtshaw-0712961957440001@207.17.188.148> <58fs5j$[e-mail]>
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> The toroid deal is a fact..  However, if you ARE going to disconnect, get
that
> free end grounded!  Otherwise, you may have the distinct honor of one who

> has seen ball lightning inside your shack!

Too bad you can't capture it.  A small ball lightning has about 25 kWh of
energy.

On the other hand, this is probably not something to play games with...




From [e-mail] Wed Dec 11 19:37:01 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!news.kei.com!news.thenet.net!uunet!in3.uu.net!206.62.36.3!trellis.wwnet.com!news2.netdtw.com!newsserv.freeway.net!not-for-mail
From: Chuck Scott <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.misc,alt.engineering.electrical
Subject: Re: Grounding system?
Date: Sun, 08 Dec 1996 23:55:05 -0400
Organization: Freeway, Inc.
Lines: 39
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References: <[e-mail]>
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[e-mail] wrote:
>
> I live on the 23 floor of a residential building and I┤m just starting to se
t up an amateur radio station. I can┤t seem to find any information on how to
properly ground my equipment at that height. I know that the grounding cable s
houldn┤t be at the resonant frequency of the amateur bands.
> What I did for now is I connected everything to the cold water pipe
> system. (It┤s grounded, I checked that). Is that ok? Or can "hot spots"
> develop?
>
> The other thing are the antennas. I connected a wire (AWG 4) between the
> mast of the antenna and the wires from the lightning protection system is
> that OK?
>
> I really don┤t know how I should solve the problem wot my station
> ground....
>
> I hope someone can help me out here :)
>
> 73, Patrick
> -------------------==== Posted via Deja News ====-----------------------
>       http://www.dejanews.com/     Search, Read, Post to Usenet

Patrick:
  Despite all the good information you're getting, I suggest that you
not walk, but run to your phone and call PolyPhaser and ask them for
some of their information on lightning protection and grounding.  You
can also find them at www.polyphaser.com.  Even if you don't shell out
the bucks for their relatively expensive solutions, you owe it to
yourself, you family, your neighbors, your landlord and your insurance
company to get the information and read it.
  The reason I suggest this is because lightning protection and
grounding is not a 5 minute solution, it's something thats going to take
some effort to learn and impliment.  If you do it wrong, you might as
well not do it at all.
  A friend of mine learned the hard way.  He had a repeater antenna on
top of a 50' tower behind his house.  He had the tower "grounded" but
still lost every piece of electronics in the house and his entire
heating and cooling system. Fortunately there was no fire and nobody was
home.

Chuck


From [e-mail] Wed Dec 11 19:37:03 1996
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From: Lou Calkins <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.misc,alt.engineering.electrical
Subject: Re: Grounding system?
Date: Mon, 09 Dec 1996 12:14:48 +0000
Organization: Tamarack Engineering
Lines: 23
Message-ID: <[e-mail]>
References: <[e-mail]>
Reply-To: [e-mail]
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[e-mail] wrote:
>
> I live on the 23 floor of a residential building
 [snip]
>
> What I did for now is I connected everything to the cold water pipe
> system. (It┤s grounded, I checked that). Is that ok? Or can "hot spots"
> develop?
>
 Patrick -

RF equipment wants to see "real" ground as close to it as possible.  You
will have to develop an "artificial ground" because at the frequencies
of Amateur Radio RF, your equipment will see the cold water pipe as an
open circuit.  I had this problem once with just 30 feet of wire to 3
actual ground rods.

You can get a box that does the artificial ground for you from MFJ (look
in QST magazine), but I have never tried one.  You probably should post
a question like this in a news group like rec.radio.amateur.misc.  Good
luck.

--- Lou  WA8YRH


From [e-mail] Wed Dec 11 19:37:04 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.misc,alt.engineering.electrical
Subject: Re: Grounding system?
Date: 9 Dec 1996 23:09:03 GMT
Organization: DigiPhone Corporation, Bryan/College Station Texas 409-693-8885
Lines: 49
Message-ID: <58i66f$[e-mail]>
References: <[e-mail]> <[e-mail]>
Reply-To: [e-mail]
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Xref: news1.epix.net rec.radio.amateur.antenna:32566 rec.radio.amateur.misc:120195 alt.engineering.electrical:10034

In <[e-mail]>, Chuck Scott <[e-mail]> writes:
>[e-mail] wrote:
>>
>> I live on the 23 floor of a residential building and I┤m just starting to s
et up an amateur radio station. I can┤t seem to find any information on how to
 properly ground my equipment at that height. I know that the grounding cable
shouldn┤t be at the resonant frequency of the amateur bands.
>> What I did for now is I connected everything to the cold water pipe
>> system. (It┤s grounded, I checked that). Is that ok? Or can "hot spots"
>> develop?
>>
>> The other thing are the antennas. I connected a wire (AWG 4) between the
>> mast of the antenna and the wires from the lightning protection system is
>> that OK?
>>
>> I really don┤t know how I should solve the problem wot my station
>> ground....
>>
>> I hope someone can help me out here :)
>>
>> 73, Patrick
>> -------------------==== Posted via Deja News ====-----------------------
>>       http://www.dejanews.com/     Search, Read, Post to Usenet
>
>Patrick:
>  Despite all the good information you're getting, I suggest that you
>not walk, but run to your phone and call PolyPhaser and ask them for
>some of their information on lightning protection and grounding.  You
>can also find them at www.polyphaser.com.  Even if you don't shell out
>the bucks for their relatively expensive solutions, you owe it to
>yourself, you family, your neighbors, your landlord and your insurance
>company to get the information and read it.

      Amen.

>  The reason I suggest this is because lightning protection and
>grounding is not a 5 minute solution, it's something thats going to take
>some effort to learn and impliment.  If you do it wrong, you might as
>well not do it at all.

      Amen.

>Chuck

      Amen.  (chorus here...)


//-----------------------------
Mike - W5WQN
[e-mail]
[e-mail]



From [e-mail] Wed Dec 11 19:37:05 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.misc,alt.engineering.electrical
Subject: Re: Grounding system?
Date: 10 Dec 1996 17:52:20 GMT
Organization: DigiPhone Corporation, Bryan/College Station Texas 409-693-8885
Lines: 29
Message-ID: <58k80k$[e-mail]>
References: <[e-mail]> <wtshaw-0712961957440001@207.17.188.148> <58fs5j$[e-mail]> <01bbe574$1d2ee440$f50f2399@peter-s>
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In <01bbe574$1d2ee440$f50f2399@peter-s>, "Peter Gottlieb" <peter_gottlieb@msn.
com> writes:
>> The toroid deal is a fact..  However, if you ARE going to disconnect, get
>that
>> free end grounded!  Otherwise, you may have the distinct honor of one who
>
>> has seen ball lightning inside your shack!
>
>Too bad you can't capture it.  A small ball lightning has about 25 kWh of
>energy.
>
>On the other hand, this is probably not something to play games with...
>

Paul Michael Sittler told me he was DEFINITELY not inclined to play games
with it.  He said in the split seconds that it all happened, he was like,
more wishing it would go away and scared to death it was going to move
toward him.  He really didn't have time to contemplate anything like his naval

over the event.

Said his ears rang for a while after it exploded in front of him.

   :)


//-----------------------------
Mike - W5WQN
[e-mail]
[e-mail]



From [e-mail] Wed Dec 11 19:37:06 1996
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From: "William E. Sabin" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.misc,alt.engineering.electrical
Subject: Re: Grounding system?
Date: Tue, 10 Dec 1996 22:48:21 -0800
Organization: none
Lines: 24
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
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Gary Coffman wrote:
>
> Connecting your antenna mast directly to the building lightning downleads
> with #4 was a very good step. This *should* divert the majority of a direct
> strike's currents into the building lightning mitigation system and frame.
> Your ground window will protect you from the rest. One caution, however,
> large currents can flow between this bond point and your station ground
> window. To avoid damage to coax and control wiring, run a heavy grounding
> lead between these two points. (Yeah, that'll cause a ground loop, but
> don't worry about that, the coax shields already did, and the ground
> window will short out the loop for the equipment on the inside of the
> window.)
>

I wonder if, instead of *bonding* the roof top environment to the station
environment, it would be better to *isolate* the two. If the antenna is
tied to the building structure using heavy, low inductance straps, then
if all cables to the radio are loaded with large ferrite beads that
present a high longitudinal impedance to the impulse, then the protection
at the equipment location could be less draconian (gas tubes, spark gaps,
isolation transformers etc.). The idea of introducing a ground loop does
not fly too well.

Bill W0IYH


From [e-mail] Wed Dec 11 19:37:07 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!news.kei.com!newsfeed.internetmci.com!howland.erols.net!dciteleport.com!worldnet.att.net!ix.netcom.com!news
From: [e-mail](Dan Walker)
Newsgroups: rec.radio.amateur.antenna
Subject: Grounding, Bonding, etc.
Date: 9 Dec 1996 21:28:47 GMT
Organization: Netcom
Lines: 24
Message-ID: <58i0af$[e-mail]>
NNTP-Posting-Host: sdx-ca12-08.ix.netcom.com
X-NETCOM-Date: Mon Dec 09  1:28:47 PM PST 1996

I got quite a few posts in response to my ground questions.

Thanks to all of you!

So, here's the summary:

    1. Antennas have to be grounded for lightning protection to a
       ground rod

    2. The ground rod has to be 8' deep UNLESS the property has rocky
       soil. In that case the rod can be laid in a trench 18" deep

    3. All grounds must be bonded to the house electrical system.



   Now, here's another question:


   If  everything is bonded properly, will this keep the ground wires
from radiating stray RF?





From [e-mail] Wed Dec 11 19:37:08 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!news-peer.gsl.net!news.gsl.net!portc01.blue.aol.com!audrey01.news.aol.com!not-for-mail
From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Grounding, Bonding, etc.
Date: 10 Dec 1996 03:09:44 GMT
Organization: AOL http://www.aol.com
Lines: 34
Message-ID: <[e-mail]>
References: <58i0af$[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]
X-Newsreader: AOL Offline Reader

In article <58i0af$[e-mail]>, [e-mail](Dan
Walker) writes:

>So, here's the summary:
>
>    1. Antennas have to be grounded for lightning protection to a
>       ground rod
>
>    2. The ground rod has to be 8' deep UNLESS the property has rocky
>       soil. In that case the rod can be laid in a trench 18" deep
>
>    3. All grounds must be bonded to the house electrical system.
>
>
>
>   Now, here's another question:
>
>
>   If  everything is bonded properly, will this keep the ground wires
>from radiating stray RF?

Hi Dan,

In rocky soil an 18" deep 8 foot long rod is a good lightning ground? I
think not.

It is not even a good ground when driven deep into wet soil, at least not
one I'd ever depend on.

I'd use multiple rods and some buried radial wires.

Gary C, get in here and straighten this out.

73 Tom


From [e-mail] Wed Dec 11 19:37:09 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.net!demos!news-out.communique.net!mr.net!www.nntp.primenet.com!nntp.primenet.com!news.texas.net!news.kei.com!newsfeed.internetmci.com!newsbuffer.myriad.net!news.myriad.net!usenet
From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Grounding, Bonding, etc.
Date: 10 Dec 1996 18:22:08 GMT
Organization: DigiPhone Corporation, Bryan/College Station Texas 409-693-8885
Lines: 31
Message-ID: <58k9og$[e-mail]>
References: <58i0af$[e-mail]> <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: usr14s4.myriad.net
X-Newsreader: IBM NewsReader/2 2.0

In <[e-mail]>, [e-mail] writes:
>In article <58i0af$[e-mail]>, [e-mail](Dan
>Walker) writes:
>
>>So, here's the summary:
>In rocky soil an 18" deep 8 foot long rod is a good lightning ground? I
>think not.
>
>It is not even a good ground when driven deep into wet soil, at least not
>one I'd ever depend on.
>
>I'd use multiple rods and some buried radial wires.
>
>Gary C, get in here and straighten this out.
>
>73 Tom

     Tom, Tom, the piper's son
      we tell them all
       and away they run....

     :)

      It's almost as bad as the original rhyme!
      Only, here, EVERYMAN is the king of his own castle!

//-----------------------------
Mike - W5WQN
[e-mail]
[e-mail]



From [e-mail] Wed Dec 11 19:37:10 1996
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!news-out.communique.net!demos!Gamma.RU!srcc!news.cs.hku.hk!hkusud.hku.hk!newsgate.cuhk.edu.hk!hammer.uoregon.edu!hunter.premier.net!feed1.news.erols.com!howland.erols.net!swrinde!ihnp4.ucsd.edu!news1.ucsd.edu!news-mail-gateway
From: [e-mail] (Pat Barthelow)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Ham-Ant Digest V96 #857, Beam Headings
Date: 2 Dec 96 14:56:08 GMT
Organization: ucsd usenet gateway
Lines: 6
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]

Use  Alta Vista on the intenet, and type in NV3Z, as a search word.
First listing you get is an interactive program that draws a great circle
map of the world with a title of your choice, centered on the Lat, Long
of your choice.....great maps......NV3Z and a partner are the authors of
the software that draws the maps, and should be commended for their efforts.
73, de Pat, AA6EG   [e-mail]


From [e-mail] Wed Dec 11 19:37:11 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!news.sprintlink.net!news-pull.sprintlink.net!news.sprintlink.net!news-peer.sprintlink.net!visi.com!news
From: [e-mail] (Edward Addy)
Newsgroups: rec.radio.amateur.antenna
Subject: HARDLINE - 230 Ft of New 1 5/8 Gas Hardline For Sale
Date: 11 Dec 1996 19:36:11 GMT
Organization: N. American Cntr. for Emerg. Comms.
Lines: 25
Message-ID: <58n2fb$[e-mail]>
NNTP-Posting-Host: 192-153.dynamic.visi.com
X-Newsreader: WinVN 0.92.5

We have an excess spool of 1 5/8 inch gas heliax which we wish to sell.

This spool is new and 230 foot in length.

This cable is very low loss.  We will be selling the entire spool
in one piece, on a first come basis.  We are asking $7.00 per Ft.
which is about 1/2 the market price.

If you or your club can use this cable, please contact us.

Regards,

Edward Addy
Director
NACEC Center


-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-=-=-=-=
     Serving Military Families & Disaster Relief Operation

 The North American Center For               E-mail: [e-mail]
 Emergency Communications Inc., (NACEC)      Phone: [phone]
 P.O. Box 23057, Minneapolis, MN 55423

            WWW Area (Main): http://www.nacec.org/


From [e-mail] Wed Dec 11 19:37:12 1996
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From: aor <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Help : FM 96.3MHz  transmission antenna for localised radio broadcasting
Date: Mon, 09 Dec 1996 20:15:11 -0500
Organization: gteais-org
Lines: 27
Message-ID: <[e-mail]>
References: <[e-mail]>
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To: Joel <[e-mail]>

Joel,

We had a blast! We built 2 halo antennas.  Each one was a 1/2 wave on
our frequency, fed with a gamma match, spaced 5/8 wave vertically.  The
splitter was a simple 75 ohm equal lengths of odd 1/4 coax runs and a
tee connector.

Assume many things here..... then,....

From your description, face both antennas 90 degrees.  Remember to take
into account the line losses.  Two dipole antennas will exhibit 5 dbi
gain(2db for a single dipole plus 3 db for stacking = 5dbi).  Subtract 3
db in losses (coax, splitters, etc.) giving a net system gain of about
2dbi.  You can actually run 6-7 watts at the back of the transmitter and
still be at the 10 watt ERP.  What is the max power of this unit?  It
must be type approved and be continuous duty.

Again, this is a very simplistic chalk talk of what we did years ago
here in the States.  We did not cover polarity issues (is this for the
dorms or automobiles).  Each will have a different answer an antenna
choice.   We chose the dorms and a horizontal polarization.

Good luck.

Al NW2M

http://www.dsport.com/marc/


From [e-mail] Wed Dec 11 19:37:13 1996
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From: INSIGHT Services <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: HELP : Kiwa Pocket Loop
Date: Thu, 5 Dec 1996 10:25:27 -0500
Organization: Concentric Internet Services
Lines: 12
Message-ID: <[e-mail]>
NNTP-Posting-Host: viking.cris.com
Mime-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII

I was wondering if anyone had used the above antenna. I am going to b
using it for SW reception. Thanks.

---
Susan Driggers
Spam Killer !
In the Mountains of Eastern Tennessee, USA
DX-394 with 35 foot Random Wire
Kenwood TS-520S with 35 foot Random Wire
Real radios glow in the dark !




From [e-mail] Wed Dec 11 19:37:14 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Help AEA Loop...
Date: 3 Dec 1996 02:40:11 GMT
Organization: AOL http://www.aol.com
Lines: 21
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

RE: Good RX, Bad TX

I  stand by my comment. To argue against the physics is a bit absurd.
AGAIN: reciprocity dictates that the observables of RX are the same as the
observables of TX.

Obviously if you want to add a black box (preamp) on RX, it doesn't matter
if the gain is lousy as long as the directivity is there.  The preamp IS
NOT THE ANTENNA. And yes; I know what hams do and how they do it,
especially on 40 and 80M.

Would I run QRO on a microloop? Of course not! But that's NOT a
contradiction to the law of reciprocity. Clearly if the practical issue of
saturation at the high end of the dynamic range  occurs for a loop I
wouldn't try to use it.

My concern is that those who are unfamiliar with reciprocity might take
your aphorism as some physical law rather than a practical rule of thumb.

73
Chip N1IR


From [e-mail] Wed Dec 11 19:37:15 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Help AEA Loop...
Date: 4 Dec 1996 03:30:34 GMT
Organization: AOL http://www.aol.com
Lines: 12
Message-ID: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

I agree with Chip's comment "the observables of RX are the same as the
observables of TX".

At the same time, I agree with Tom's contention that the observables that
matter for optimal TX are not necessarily the observables that matter for
optimal RX--and vice versa.

I'm not clear where the argument is?

Rick  K1BQT




From [e-mail] Wed Dec 11 19:37:16 1996
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From: "FUman" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.equipment,rec.radio.amateur.misc,rec.radio.amateur.swap
Subject: Re: Help Identifying Heliax Cable
Date: 2 Dec 1996 07:31:53 GMT
Organization: kg7fu
Lines: 31
Message-ID: <01bbe023$2eaeb7a0$[e-mail]>
References: <57gb1c$[e-mail]>
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Xref: news1.epix.net rec.radio.amateur.antenna:32297 rec.radio.amateur.equipment:43466 rec.radio.amateur.misc:119384



Douglas Berry <[e-mail]> wrote in article =
<57gb1c$[e-mail]>...
> Hello to all and thanks for reading this message
>=20
> I recently acquired some surplus cable TV trunk line. I suspect the =
cable is 75 ohm but=20
> not sure. The cable is 11/16 inch in diameter with black plastic =
coating over an=20
> aluminum jacket there is a white dialectric and a thick center =
condutor. the numbers=20
> written on the wire are T10  J. On the reel there is a Type No =
T10625JBFV1 and below=20
> that the number GN7GN. I would appreciate any help at identifying this =
wire what it's=20
> approxmatly worth and were I would be able to fine connector that =
would fit it.
>=20
> Thanks Again
> 73's  Doug  VA3DMB

The ratio between the inner and outer counductors will yield you the Zo =
of the line.

Check the ARRL or RSGB handbooks (or other engineering texts) to find =
the formulae.

de kg7fu




From [e-mail] Wed Dec 11 19:37:17 1996
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From: Darin Mc Michael <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: help on radiation patterns
Date: Mon, 2 Dec 1996 20:30:44 -0800
Organization: Oregon State University
Lines: 13
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NNTP-Posting-Host: ucs.orst.edu
Mime-Version: 1.0
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        I have looked for answers on radiation patterns concerning 2 meter band
antennas and have had very little luck.  Could anyone help me on some
radiation pattern information?  I am interested in the patterns from 1/4
wave length through 1 wave length, and also what are the effects of
going over a wave length? Such as a 1 and 1/4 wave length?
        Also I am curious in the use of coils to convert a longer antenna
to a shorter antenna other than just size convenience.  Is there a change
in radiation pattern when, for example, a 5/8 wavelength is shortened to
a 1/4 by using coils?  Does the same antenna retain the reception and
transmitting gain of the 5/8 wavelength?

Thanks in advance for information offered?
Darin McMichael, KC7NOT


From [e-mail] Wed Dec 11 19:37:18 1996
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From: Bob Krueger <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Help On Stacked 5/8 Wave Antenna Construction
Date: Sun, 08 Dec 1996 19:56:48 -0600
Organization: The DataXchange Network, Inc
Lines: 24
Message-ID: <[e-mail]>
Reply-To: [e-mail]
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Hello America:

I was wandering through the MFJ catalog this evening and came across a
antenna they market that is a 5/8 wave stacked verticle for 2 meters
that also functions on 6 meters as a fullwave centerfed antenna for the
remarkable price of $44.95.

First I'd like to make it clear that I'm not a antenna expert, with that
out of the way will move on. I like experimenting with antennas and
would like to build one of these myself, but need some advise on
construction data for this type of antenna with regard to calculating
raditor lengths, mast/boom, decoupling and shunt choke, maybe there is a
good software antenna design program out there you could point me to.

I would also like to find a goog construction text on antennas, problem
the amateur has with most texts on the subject is that they lend
themselves 90% to the technical side rather than the "show & tell or how
to do it.

Thanks in advance.

Bob Krueger, N9BKJ
[e-mail]



From [e-mail] Wed Dec 11 19:37:19 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Help On Stacked 5/8 Wave Antenna Construction
Date: 9 Dec 1996 14:58:07 GMT
Organization: AOL http://www.aol.com
Lines: 28
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

Hi Bob--

For two meters, two 50" elements are about right.  You can tune the
reactance out of each element with a small coil, or replace the first
portion of the element with a coxial delay line protected inside a length
of 1/2" PVC pipe (10-7/8" works with Radio Shack RG58).

            ___________Delay line _______________
        \____________________________________ I_Rod Element____
        /   ___________________________________I

The feedpoint impedance for the stacked antennas will be around 100 Ohms
and balanced.  You can kill two birds with one stone by taking a 3/4-wave
(electrical) hunk of RG59 (about 46-1/2" for Rad Shack foam cable) and
forming it into a choke coil around the antenna center support mast (use
1-1/2" PVC pressure pipe or similar size Sched-40 for this).  This will
provide several hundred ohms of reactance on the outside of the line to
decouple the antenna--and simultaneously provide a 2:1 impedance
transition on the inside to match it.  Connect a 50-Ohm cable to the other
end, and you're in business.

Side mount it approximately 30-36" off your mast of tower.  I just built
one of these, and it works great.  VSWR should be anywhere from dead flat
to--worst case--1.2:1, depending on how carefully you measure things--and
where you mount it.

Rick  K1BQT



From [e-mail] Wed Dec 11 19:37:20 1996
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From: "Mark McClain" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Help w/Tilt-Over base for Rohn 64
Date: 7 Dec 1996 05:30:28 GMT
Organization: InternetMCI
Lines: 12
Message-ID: <01bbe3ff$82bb4fe0$b10737a6@204.70.128.1>
NNTP-Posting-Host: usr19-dialup49.mix1.sacramento.mci.net
X-Newsreader: Microsoft Internet News 4.70.1155

Can anyone provide any information regarding the design for a tilt-over
base for a Rohn 64 tower? I think it's an HDX?? (It's a flat angle type
instead of a tubular.)

We have the tower and need to make a base so the tower can be tilted up and
down. Any information would be greatly appreciated!!

Thanks,

Mark McClain, N6OBY
Seattle, WA



From [e-mail] Wed Dec 11 19:37:21 1996
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From: "Mark McClain" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Help w/Tilt-Over base for Rohn 64 (Actually, it's a Rohn 48)
Date: 8 Dec 1996 01:57:02 GMT
Organization: InternetMCI
Lines: 10
Message-ID: <01bbe4aa$d5e44220$bc0737a6@204.70.128.1>
References: <01bbe3ff$82bb4fe0$b10737a6@204.70.128.1>
NNTP-Posting-Host: usr19-dialup60.mix1.sacramento.mci.net
X-Newsreader: Microsoft Internet News 4.70.1155

Oops. Sorry, I meant Rohn 48!!!

Mark McClain

> Thanks,
>
> Mark McClain, N6OBY
> Seattle, WA
>
>


From [e-mail] Wed Dec 11 19:37:22 1996
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From: [e-mail] (G. North)
Newsgroups: rec.radio.amateur.antenna
Subject: HELP WANTED: CO-Phasing two Yagi: Anyone has the calculations, theory and practice.
Date: 10 Dec 1996 04:14:25 GMT
Organization: General Research
Lines: 27
Message-ID: <58io31$[e-mail]>
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Help WTD:Cophasing two Yagi 477 Mhz: Any one has the calculations,
theory and practice.

Hello

I am trying to Co-Phase two yagi 16 elements.

Both yagi are folded dipole (300 ohms each dipole) attached to 660
millimeters of 75 ohm cable RG 59. This N plug goes straight in my 50
ohms antenna socket transceiver.

This allows me to  and finish at 50 ohm.

I am trying to co-phase both Yagi to increase reception by a couple of
dB.

Would anyone knows of a reception pre-amplifier for 477 MHZ. This is
really very similar to 432 MHZ. It behave very much the same.

Please E-mail me directly to: [e-mail]

The matter is for serious application and urgent.

Thanks

Cheers  Guy North



From [e-mail] Wed Dec 11 19:37:23 1996
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From: Tore Stabell Kuloe <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: HELP...guru wanted.
Date: Wed, 11 Dec 1996 00:29:18 +0100
Organization: SN Internett
Lines: 30
Message-ID: <[e-mail]>
Reply-To: [e-mail]
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Hi, out there. I'm buying a new receiver any day now, and thought it was
time to think about the antenna.
I listen to aircraft on HF, mostly in the frequencies about
        2.8MHz
        3.4MHz
        5.5MHz
        6.6MHz
        8.9MHz
        11.2MHz
        13.2MHz

So my question to you gurus is:

What sort of antenna can I put up with low costs, that will not make my
neighborhood look like a military radio centre?
Can I do with just one, and how long should it be?
A dipole?

I would be very happy if someone replied; otherwise I have to use a
whip...:(


Regards, Tore
--

Tore Stabell Kuloe  (Kul°)
[e-mail]
Bjoernemyr terrasse 20
N-1453 Bjoernemyr
NORGE - NORWAY


From [e-mail] Wed Dec 11 19:37:24 1996
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From: [e-mail] (John Hill)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Help: Loop feeding problem
Date: Mon, 02 Dec 96 04:22:02 GMT
Organization: Department of Redundancy Dept.
Lines: 17
Message-ID: <57tm0f$[e-mail]>
References: <565do3$[e-mail]> <[e-mail]> <57e9ee$[e-mail]>
NNTP-Posting-Host: cy5.minn.net
X-Newsreader: News Xpress 2.0 Beta #2

In article <57e9ee$[e-mail]>, [e-mail] (Roy Lewallen)
wrote:

Enough Already!

I posted the original article. Well it turns out my loop is interacting with
the shunt feed arm I use to shunt feed my tower, from which the loop is
suspended. For my tower's electrical nature, I had to use a 34 ft. shunt arm
and that seems to be pulling the loop off frequency. It may be possible the
whole arrangement (tower resonated on 80M is contributing. I'm not stupid. I
did use a current balun at the feedpoint and tried both a quarter wave 75 ohm
section as well as a 50 ohm section and even tried no balun. All 3 yielded the

same result. Now I have to shorten the shunt arm and add some parallel
capacitance to make up for it, which I don't really want to do as it'll no
doubt narrow the bandwidth of the 80M antenna, which I like the way it is.
73, John, NJ0M

"take the canalone, leave the gun"


From [e-mail] Wed Dec 11 19:37:25 1996
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From: Duncan Clark <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Help: Loop feeding problem
Date: Mon, 2 Dec 1996 10:14:26 +0000
Organization: DNAmp Ltd.
Lines: 33
Distribution: world
Message-ID: <[e-mail]>
References: <565do3$[e-mail]> <[e-mail]>
 <57e9ee$[e-mail]>
NNTP-Posting-Host: n71i036.c1r1.pol.co.uk
Mime-Version: 1.0
X-Newsreader: Turnpike Version 3.01 <$Rs$gOIdQ8uAcGIB$H6v0dp7K$>

In article <57e9ee$[e-mail]>, Roy Lewallen
<[e-mail]> writes
>Since most feedpoints are out of reach I usually measure feedpoint
>>> impedance by using a 1/2 wave length coax (*Velocity) without anything
>>> else. At the coax end I am "sure" that I have the Z of the antenna and
>>> not some coax transformed value.

Can one do this to tune a reflector for best front to back on a cubical
quad in the air ie use a variable capacitor at the end of an electrical
1/2 wave length, adjust for best front to back on receive, measure value
then use a fixed capacitor directly on the reflector? I cannot lower my
4ele quad to tune the reflector at a reachable level. I can however tilt
it over so it fires skywards and can therefore attach coax to the
reflector etc. Would one use 75ohm twin or coax? The original quad was
put up with the reflector cut to book value. F/B is fine on 10, 12 and
20 bands but 21 and 18 in particular need fine tuning. My only other
thought is to attach a light weight variable capacitor with motor tuning
at the reflector and get the optimum value that way.

Many thanks

Duncan
G4ELJ

------------------------------------------------------------------------------
--
The problem with being on the cutting edge is that you occasionally get
sliced from time to time....

Dr. Duncan Clark
DNAmp Ltd.
TEl/FAX [phone]
http://www.dnamp.com
http://www.genesys.demon.co.uk


From [e-mail] Wed Dec 11 19:37:28 1996
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From: Bart Dolega <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: HF DELTA-LOOP Balun
Date: Mon, 09 Dec 1996 22:54:51 -0600
Organization: :-)
Lines: 2
Message-ID: <[e-mail]>
Reply-To: [e-mail]
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Do I use 1:1 Balun or 4:1 Balun with DELTA-LOOP type antennas ?
Vy 73! be Bart


From [e-mail] Wed Dec 11 19:37:29 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.net!vixen.cso.uiuc.edu!newsfeed.internetmci.com!ionews.ionet.net!usenet
From: Hank Blackstock <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: HF DELTA-LOOP Balun
Date: Tue, 10 Dec 1996 16:09:06 -0600
Organization: Internet Oklahoma
Lines: 9
Message-ID: <[e-mail]>
References: <[e-mail]>
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To: [e-mail]

Bart Dolega wrote:
>
> Do I use 1:1 Balun or 4:1 Balun with DELTA-LOOP type antennas ?
> Vy 73! be Bart

If it was me I would not use a balun at all. Use twinlead and a Johnson
Matchbox for best results.

73 Hank WA5JRH


From [e-mail] Wed Dec 11 19:37:30 1996
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From: Cecil Moore <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: HF DELTA-LOOP Balun
Date: Tue, 10 Dec 1996 08:57:35 -0800
Organization: Intel Corporation
Lines: 6
Message-ID: <[e-mail]>
References: <[e-mail]>
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Bart Dolega wrote:
> Do I use 1:1 Balun or 4:1 Balun with DELTA-LOOP type antennas ?

Hi Bart, what is the resonant feedpoint impedance of your delta loop?

73, Cecil, W6RCA, OOTC


From [e-mail] Wed Dec 11 19:37:31 1996
Newsgroups: rec.radio.amateur.antenna
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From: [e-mail] (Edmund H. Ramm)
Subject: Re: How Well Does R7 Work on 40M?
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"Rich Hebel" <[e-mail]> writes:

>I installed an R7 last summer.  I can comment on comparisons with an
>Alpha-Delta DXCC multiband trap dipole I had up at the same time. The DXCC
> [...]

>In A/B comparisons, both antennas performed about the same on 40m, which
>was generally fairly good.  In my installation however, the DXCC was
>noticeably quieter, even with signals off the ends of the dipole.  I
> [...]

   This I can only confirm. I get better 40m DX reception on my 24" agl
Windom than on my 30" agl R7, the latter's noise drowns almost all of
it. On all other bands the R7 yields performance superior to the Windom,
though. As I got the R7 to improve my 40m results, I can't hide my
disappointment either.

   73, Eddi
--
   [e-mail] - [e-mail] - DK3UZ@DB0HHT.#HH.GER.EU
               Linux/m68k, the best U**x ever to hit an Atari!
    Distribution of this message via the Microsoft Network is prohibited


From [e-mail] Wed Dec 11 19:37:32 1996
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From: "L. H. Prochazka" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: HQ-1 antenna by Mini-Products Inc. Erie, PA
Date: 4 Dec 1996 07:53:57 GMT
Organization: Fransen  Engineering Ltd.
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Would appreciate any information about this interesting quad-yagi HQ-1
antenna.
N7SOO           [e-mail]


From [e-mail] Wed Dec 11 19:37:33 1996
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From: [e-mail] (Bill Nelson)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: HQ-1 antenna by Mini-Products Inc. Erie, PA
Date: 6 Dec 1996 07:36:21 GMT
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L. H. Prochazka ([e-mail]) wrote:
: Would appreciate any information about this interesting quad-yagi HQ-1
: antenna.
: N7SOO           [e-mail]

Hm, what is interesting about it?  Most quaggis are just a regular yagi,
with a quad reflector.

Bill


From [e-mail] Wed Dec 11 19:37:34 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: hy-gain 18hts vertical
Date: 8 Dec 1996 03:47:24 GMT
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RE: 18HT Vertical.
I had one of these many years ago. Good band width and got out FB. What I
do remember is that I had to dig one hell of a hole for the base mount,
this is a tall s.o.b. compaired to most veticals. I had a simple/easy way
to set the tower legs into the cement footing and get them " true ". If
you are interested I'll e-mail what I did rathr than take up space here.
e-mail to [e-mail].
73's..Bob


From [e-mail] Wed Dec 11 19:37:34 1996
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From: "Mike Warren" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Info needed - "Carolina Windom" antennas
Date: 9 Dec 1996 19:32:58 GMT
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Anybody know anything about these antennas?
--
Mike Warren, W5MAZ
[e-mail]


From [e-mail] Wed Dec 11 19:37:35 1996
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From: "Dale R. Parfitt" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Is there a 6m antenna good for reducing TVI?
Date: Tue, 03 Dec 1996 18:53:26 -0500
Organization: PAR Electronics
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FUman wrote:
>
> [e-mail] wrote in article <57nhjr$[e-mail]>
...
> > I was transmitting on 6m SSB last night using the usual 8 watts
> > out from a transverter to an inverted vee up around 35 feet when
> > a neighbor knocked on the door stating his TV was being "wiped out."
> > Since my transmissions don't affect our own TV, which is on cable,
> > I believe his TV is hooked up to rabbit ears and he's listening to
> > broadcast TV, probably channel 3.  I'm planning to install a 6m
> > halo soon, with a directional antenna of some sort to follow next
> > year.  Would the halo, and a quad or yagi, make the TVI worse, or
> > better?  What antenna would cause the least TVI?  Thanks for your
> > help.  --Bill KB8USZ  [e-mail]
> >
>
> Changing the polarization to horizontal may help a bit, but if the
> problem is front-end-overload a -20dB reduction may not be noticeable.
>
> Best advice is try TVI traps at the offended receiver. Give your neighbor a
> radio shack catalog and circle the 75 and 300 Ohm models. Tell 'em that your
> set isn't affected so you're not to blame. $5.00 for him to pay is piece of
mind
> for the both of you. His installation is 90% proabably to blame.
>
> Another trick is to make a shorted stub out of 300 Ohm twinlead and detune
> the TV receiver.
>
> de kg7fuA vertically polarized antenna would give you a start at TVI reducti
on
but the easiest solution (assuming the TVI is generated from front end
overload of the TV RX) would be a highpass filter at the back of the TV
or in front of any system amplifiers. We make a 5th order elliptic high
pass w/ a 40 dB notch at 50.1 and less than 2 dB loss at CH2 video.
There are probably others available. However, many are made for HF and
have little loss at 6M and are therefore ineffective

73,  Dale W4OP


From [e-mail] Wed Dec 11 19:37:37 1996
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From: "Dale R. Parfitt" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Is there a 6m antenna good for reducing TVI?
Date: Tue, 03 Dec 1996 18:58:59 -0500
Organization: PAR Electronics
Lines: 42
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To: "Dale R. Parfitt" <[e-mail]>

Dale R. Parfitt wrote:
>
> FUman wrote:
> >
> > [e-mail] wrote in article <57nhjr$[e-mail]
u>...
> > > I was transmitting on 6m SSB last night using the usual 8 watts
> > > out from a transverter to an inverted vee up around 35 feet when
> > > a neighbor knocked on the door stating his TV was being "wiped out."
> > > Since my transmissions don't affect our own TV, which is on cable,
> > > I believe his TV is hooked up to rabbit ears and he's listening to
> > > broadcast TV, probably channel 3.  I'm planning to install a 6m
> > > halo soon, with a directional antenna of some sort to follow next
> > > year.  Would the halo, and a quad or yagi, make the TVI worse, or
> > > better?  What antenna would cause the least TVI?  Thanks for your
> > > help.  --Bill KB8USZ  [e-mail]
> > >
> >
> > Changing the polarization to horizontal may help a bit, but if the
> > problem is front-end-overload a -20dB reduction may not be noticeable.
> >
> > Best advice is try TVI traps at the offended receiver. Give your neighbor
a
> > radio shack catalog and circle the 75 and 300 Ohm models. Tell 'em that yo
ur
> > set isn't affected so you're not to blame. $5.00 for him to pay is piece o
f mind
> > for the both of you. His installation is 90% proabably to blame.
> >
> > Another trick is to make a shorted stub out of 300 Ohm twinlead and detune
> > the TV receiver.
> >
> > de kg7fuA vertically polarized antenna would give you a start at TVI reduc
tion
> but the easiest solution (assuming the TVI is generated from front end
> overload of the TV RX) would be a highpass filter at the back of the TV
> or in front of any system amplifiers. We make a 5th order elliptic high
> pass w/ a 40 dB notch at 50.1 and less than 2 dB loss at CH2 video.
> There are probably others available. However, many are made for HF and
> have little loss at 6M and are therefore ineffective
>
> 73,  Dale W4OP

OOPS! My previous reply should have read "vertical polarization"


Dale W4OP


From [e-mail] Wed Dec 11 19:37:38 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Is there a 6m antenna good for reducing TVI?
Date: 4 Dec 1996 12:59:15 GMT
Organization: AOL http://www.aol.com
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Mike wrote:

"Another consideration is station grounding. I don't mean to insult you,
but a
poor ground could also be part of your TVI problem."

My Reply:

I agree with Mike that a POOR ground could be part of the TVI generating
problem. This is especially true if the ground connections are corroded,
or if common-mode RF current is present on the feedline and chassis--and
causing the ground lead to radiate. It is important to remember that, at
VHF, almost ANY ground lead is going to be a significant percentage of a
wavelength long and will be capable of radiating a healthy signal.

I could be wrong, but I believe the only real purpose of a good earth
ground at VHF is to take care of static and other DC phenomina.  In fact,
it may be better to have NO ground rather than a bad one in terms of VHF
surpression (a poor safety practice, though). The key is to prevent
feedline (common mode) radiation by blocking or nulling it out at the
antenna feedpoint.  That way, you can have a good DC ground on the radio,
or--better yet--a good DC ground where the feedline enters the building,
and it won't radiate.

plus:

1. Direct as much signal away from your neighbor as possible by using a
directional antenna.

2. Put a filter on his TV that will pass channel 2 but reject low-end
50-MHz (the off-the-shelf Radio Shack filter will not do this).


Rick  K1BQT


From [e-mail] Wed Dec 11 19:37:40 1996
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From: Mike <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Is there a 6m antenna good for reducing TVI?
Date: Tue, 03 Dec 1996 23:01:17 -0800
Organization: FNS
Lines: 54
Message-ID: <[e-mail]>
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To: "Dale R. Parfitt" <[e-mail]>

Dale R. Parfitt wrote:
>
> Dale R. Parfitt wrote:
> >
> > FUman wrote:
> > >
> > > [e-mail] wrote in article <57nhjr$[e-mail].
edu>...
> > > > I was transmitting on 6m SSB last night using the usual 8 watts
> > > > out from a transverter to an inverted vee up around 35 feet when
> > > > a neighbor knocked on the door stating his TV was being "wiped out."
> > > > Since my transmissions don't affect our own TV, which is on cable,
> > > > I believe his TV is hooked up to rabbit ears and he's listening to
> > > > broadcast TV, probably channel 3.  I'm planning to install a 6m
> > > > halo soon, with a directional antenna of some sort to follow next
> > > > year.  Would the halo, and a quad or yagi, make the TVI worse, or
> > > > better?  What antenna would cause the least TVI?  Thanks for your
> > > > help.  --Bill KB8USZ  [e-mail]
> > > >
> > >
> > > Changing the polarization to horizontal may help a bit, but if the
> > > problem is front-end-overload a -20dB reduction may not be noticeable.
> > >
> > > Best advice is try TVI traps at the offended receiver. Give your neighbo
r a
> > > radio shack catalog and circle the 75 and 300 Ohm models. Tell 'em that
your
> > > set isn't affected so you're not to blame. $5.00 for him to pay is piece
 of mind
> > > for the both of you. His installation is 90% proabably to blame.
> > >
> > > Another trick is to make a shorted stub out of 300 Ohm twinlead and detu
ne
> > > the TV receiver.
> > >
> > > de kg7fuA vertically polarized antenna would give you a start at TVI red
uction
> > but the easiest solution (assuming the TVI is generated from front end
> > overload of the TV RX) would be a highpass filter at the back of the TV
> > or in front of any system amplifiers. We make a 5th order elliptic high
> > pass w/ a 40 dB notch at 50.1 and less than 2 dB loss at CH2 video.
> > There are probably others available. However, many are made for HF and
> > have little loss at 6M and are therefore ineffective
> >
> > 73,  Dale W4OP
>
> OOPS! My previous reply should have read "vertical polarization"
>
> Dale W4OP


I found that putting a high pass filter on the neighbors tv reduced the
TVI for the most part, But he still let me know when I was on the air. I
change to a more directional antenna vertically polorized. I have not
heard a word from him since. So yes a quad or yagi will help. Another
consideration is station grounding. I don't mean to insult you, but a
poor ground could also be part of your TVI problem.

Good Luck
73, Mike K6YPB


From [e-mail] Wed Dec 11 19:37:41 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Kurt, help us please!
Date: 8 Dec 1996 14:38:58 GMT
Organization: AOL http://www.aol.com
Lines: 32
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In article <[e-mail]>, [e-mail] (Jesse
Touhey (W6KKT)) writes:

>Tom, that is very interesting.  What is the ground conductivity at
>your qth?  It must be excellent.  It is my understanding , a vert not
>only needs a extensive radial system , but excellent ground
>conductivity to best a high dipole at low angles...???
>Respectfully, Jesse, W6KKT

As near as I can guess, between one and 4 mS /m.......not very good!

My system is pretty good with all the wire around here. Where does your
understanding come from Jesse? Hear-say, models, or on the air
comparisons?

I have never seen anyone on 160 with a h<150 ft horizontal antenna beat a
vertical with a moderately good ground system when they are from the same
area. The only high horizontal antennas I've ever seen compared were the
antennas I installed at a BC station. I noticed a big improvement going
from a few hundred feet to over three hundred feet up. At lower heights
the 1/4 wl vertical usually won, but at 5/8 wl the horizontal became
clearly superior.

I'm not so sure about 80 because I spend less time there, so I've only
observed a few  comparisons of other people. I've done dozens of A-B tests
comparing my two antennas. I'm as fascinated by it as you are :-) , but
not surprised when I think of the results on 160.

I wonder if anyone else with a good vertical in a clear location ever
A-B'ed against a horizontal antenna up 120-140 ft on 80?

73 Tom


From [e-mail] Wed Dec 11 19:37:43 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Kurt, help us please!
Date: 9 Dec 1996 20:04:00 GMT
Organization: AOL http://www.aol.com
Lines: 40
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References: <[e-mail]>
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In article <[e-mail]>, [e-mail] (W6KKT
Jesse) writes:

>On 8 Dec 1996 14:38:58 GMT, [e-mail] wrote:
>
>>In article <[e-mail]>, [e-mail] (Jesse
>>Touhey (W6KKT)) writes:
>>
>>>Tom, that is very interesting.  What is the ground conductivity at
>>>your qth?  It must be excellent.  It is my understanding , a vert not
>>>only needs a extensive radial system , but excellent ground
>>>conductivity to best a high dipole at low angles...???
>>>Respectfully, Jesse, W6KKT
>>
>>As near as I can guess, between one and 4 mS /m.......not very good!
>>
>>My system is pretty good with all the wire around here. Where does your
>>understanding come from Jesse? Hear-say, models, or on the air
>>comparisons?
>>
>Hi Tom, on 80m I use a 123' dipole both ends up 100', fed with 160' of
>600 ohm open wire line.
>Every morning I work DX in the window (3.790 - 3.800 mhz).  I have
>compared this antenna many times against other Calif. stations using
>90 deg and 100deg vertical antennas (ground mounted and above gnd
>radials). In every case the high dipole (in it's best directions) is
>better by about one S unit.  This is also  confirmed  by EZNEC plots:
>A 80m dipole up 100', over poor ground, exhibits around +4.5dbi at a
>20degree takeoff angle.  A 1/4 wave vertical over poor ground is minus
>0.5dbi,and over very good ground (which few people have) is +2.6 dbi.
>On 160m a dipole up 140' has a 90 deg takeoff angle ( Almost any
>vertical will be better at low angles)
>.

Woops, that was an old message Jessie stuck in an archives file that got
posted when I clicked on the wrong icon! I had a hard drive crash and when
I moved the old backup copies it poped up as an outgoing message that I
never intended to send. Sorry.

73 Tom


From [e-mail] Wed Dec 11 19:37:44 1996
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From: [e-mail] (W6KKT Jesse)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Kurt, help us please!
Date: Mon, 09 Dec 1996 13:11:09 GMT
Organization: Microserve Information Systems (800)-380-INET
Lines: 31
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On 8 Dec 1996 14:38:58 GMT, [e-mail] wrote:

>In article <[e-mail]>, [e-mail] (Jesse
>Touhey (W6KKT)) writes:
>
>>Tom, that is very interesting.  What is the ground conductivity at
>>your qth?  It must be excellent.  It is my understanding , a vert not
>>only needs a extensive radial system , but excellent ground
>>conductivity to best a high dipole at low angles...???
>>Respectfully, Jesse, W6KKT
>
>As near as I can guess, between one and 4 mS /m.......not very good!
>
>My system is pretty good with all the wire around here. Where does your
>understanding come from Jesse? Hear-say, models, or on the air
>comparisons?
>
Hi Tom, on 80m I use a 123' dipole both ends up 100', fed with 160' of
600 ohm open wire line.
Every morning I work DX in the window (3.790 - 3.800 mhz).  I have
compared this antenna many times against other Calif. stations using
90 deg and 100deg vertical antennas (ground mounted and above gnd
radials). In every case the high dipole (in it's best directions) is
better by about one S unit.  This is also  confirmed  by EZNEC plots:
A 80m dipole up 100', over poor ground, exhibits around +4.5dbi at a
20degree takeoff angle.  A 1/4 wave vertical over poor ground is minus
0.5dbi,and over very good ground (which few people have) is +2.6 dbi.
On 160m a dipole up 140' has a 90 deg takeoff angle ( Almost any
vertical will be better at low angles)
.



From [e-mail] Wed Dec 11 19:37:46 1996
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From: [e-mail] (Donald Milner)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Log Periodic antenna vs Yagi
Date: Sat, 07 Dec 1996 15:26:22 GMT
Organization: The South African Internet Exchange.
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From one who has a homebrew LPDA and has also had mono band yagi's.
The mono band yagi will out perform the LP any time, Took my mono band
Yagi's down that were for 10 and 15M as the bands had closed down.
LPA works well on 18Mhz and 14 Mhz what I hear I can work.   But a
good Tri band yagi like the KT34XA will out perform the LPA.  One the
other hand it is a fun antenna to build and try out and will not cost
you much.  If you have the space go mono bander's if not try something
like the KT34XA or some of the Froce 12 antenna systems -- do not like
traps.
Don ... ZS6AQS ... E-mail: [e-mail]
Pretoria, South Africa.

[e-mail] (Dudley Chapman) wrote:

>[e-mail] (Jari Jokiniemi) wrote:


>>In article <563gq4$[e-mail]> [e-mail] (Dudle
y Chapman) writes:
>>   monoband yagi for equivalent performance on a single band.  However,
>>   when you compare an LPA against a tribander, with trap losses, (which
>>   get worse as the bugs and moisture crawls in) they start to become
>>   equal.

>>Anyone has an idea of how much are the trap losses with a typical
>>tribander? 1 dB? What about a fivebander like Mosley TA-53M?

>>--
>>Jari Jokiniemi, [e-mail], OH2MPO, OH3BU
>>Tekla Oy, Koronakatu 1, 02210 Espoo, [phone]


>Once again, I think you gentleman are right, that there is nothing new
>under the sun, but sometimes there are new subtle variations that seem
>to appear over time.

>I cannot dispute that the LPA is inferior to a trapless, well designed
>monobander in respect to gain vs size and weight.  There is no
>compelling reason to compare the two, as you have said.   However,
>when multiband performance is required, your choices are trapped yagis
>which have losses (which increase over time as the trap gets infested
>with bugs and moisture), and a stack of monobanders.  In this arena,
>an LPA begins to look good.  Most contesters on the East Coast are f/b
>crazy because all the rest of you guys are off the back end of their
>yagis, pounding away during a European contest.  The proximity of
>monobanders in a stack degrade their f/b.  It is for this reason that
>a number of serious top ranking contesters in Mass. are experimenting
>with LPAs in place of their stacks.

>Most of the installations I am referring to still have monobanders
>fixed on Europe and spaced wide apart from each other along the length
>of the tower.  These are fine and they are quite happy with them.
>However, where they  used to have close spaced rotatable stacks, they
>replace these with LPAs.

>About 5 years ago, I helped WA1EKV model his stack vs his 18  element
>65 ft boom LPA design.  His PC had run out of gas, and I had NEC2 on a
>VAX, so I helped him confirm his suspicions.  He was right.  He built
>two of these babies and has one at 130 ft and one at 65 ft.

>These days, MN can handle this kind of stuff, so I recommend that you
>give it a try and see if I am right.

>dudley, WA1X





From [e-mail] Wed Dec 11 19:37:46 1996
Newsgroups: rec.radio.amateur.antenna
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!feed1.news.erols.com!worldnet.att.net!uunet!in2.uu.net!192.244.176.52!news.iij.ad.jp!rim.or.jp!uucp1.rim.or.jp!papageno!hrst
From: [e-mail] (Hiroshi TOMARU)
Subject: Mechanical Resonance of FM Antenna?
Message-ID: <[e-mail]>
Sender: [e-mail] (Hiroshi TOMARU)
Organization: Independent researcher, Takasaki, Gunma, JAPAN
Date: Fri, 6 Dec 1996 05:46:53 GMT
Lines: 14

Hello.

My FM antenna creates low-frequency sound noise (perhaps less
than 200Hz) under strong wind. This five-element antenna is
set on a  metal pole of length 3m on the tin roof. Since the
frequency of the sound does not change when the strength of
wind varies, the antenna system seems to be under mechanical
resonance.

Does anyone know how to stop this irritating sound?
Thanks.
---
Hiroshi TOMARU ($BEP4]9@(J)  <- Japanese Kanji
[e-mail] (accepts NeXT-type mail < 100KB)


From [e-mail] Wed Dec 11 19:37:49 1996
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From: Leo Potjewijd <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Mechanical Resonance of FM Antenna?
Date: 7 Dec 1996 08:02:14 GMT
Organization: Lazy Lion
Lines: 37
Message-ID: <58b8a6$[e-mail]>
References: <[e-mail]>
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[e-mail] (Hiroshi TOMARU) wrote:
>Hello.
>
>My FM antenna creates low-frequency sound noise (perhaps less
>than 200Hz) under strong wind. This five-element antenna is
>set on a  metal pole of length 3m on the tin roof. Since the
>frequency of the sound does not change when the strength of
>wind varies, the antenna system seems to be under mechanical
>resonance.
>
>Does anyone know how to stop this irritating sound?
>Thanks.
>---
>Hiroshi TOMARU (=1B$BEP4]9@=1B(J)  <- Japanese Kanji
>[e-mail] (accepts NeXT-type mail < 100KB)


This might be a problem of wind resonating inside the pole and/or
elements. Close off all open ends and see if the problem disappears.

If that does not have any effect, it might be mechanical resonance of the
pole and/or elements themselfs. Filling up the entire pole and/or
elements with some sort of foam (polyurethane building foam should work,
and is chap too) will dampen it. Covering the tubes with some sort of
soft, tight fitting coating (heat-shrink tube? garden hose?) also might
do the trick.

Lastly, the guywires might resonate. I do not know any method to stop
that, but you can determine wether that is the case by tightening or
loosening them a bit. If the tone changes, you do have a serious problem.
Maybe a construction engineer has any answers (resonating hangbridges
etc...).

Succes.

73 de PE1RHX



From [e-mail] Wed Dec 11 19:37:50 1996
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From: "Ed lawrence" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Mechanical Resonance of FM Antenna?
Date: 10 Dec 1996 06:19:50 GMT
Organization: Earthlink Network, Inc.
Lines: 24
Message-ID: <01bbe662$38ca8300$9cf52399@wa5swd>
References: <[e-mail]>
NNTP-Posting-Host: cust28.max2.portland.or.ms.uu.net
X-Newsreader: Microsoft Internet News 4.70.1155



Hiroshi TOMARU <[e-mail]> wrote in article
<[e-mail]>...
> Hello.
>
> My FM antenna creates low-frequency sound noise (perhaps less
> than 200Hz) under strong wind. This five-element antenna is
> set on a  metal pole of length 3m on the tin roof. Since the
> frequency of the sound does not change when the strength of
> wind varies, the antenna system seems to be under mechanical
> resonance.
>
> Does anyone know how to stop this irritating sound?
> Thanks.
> ---
> Hiroshi TOMARU ($BEP4]9@(J)  <- Japanese Kanji
> [e-mail] (accepts NeXT-type mail < 100KB)
>
Try changing the position of the guy wires, or adding another set  at about
the 2 meter height.  Also try
some type of soung absorbing material between the mast and the roof
surface.  One more thing.  Try inserting
section of poly rope INSIDE the antenna elements.  Good Luck!   Ed  WA5SWD


From [e-mail] Wed Dec 11 19:37:51 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.net!news.ibm.net.il!arclight.uoregon.edu!feed1.news.erols.com!tezcat!cam-news-hub1.bbnplanet.com!news.bbnplanet.com!cpk-news-hub1.bbnplanet.com!www.nntp.primenet.com!nntp.primenet.com!ix.netcom.com!news
From: hershman <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: MFJ LOOP 40 MTRS ?
Date: Sat, 07 Dec 1996 14:22:49 -0500
Organization: Netcom
Lines: 3
Message-ID: <[e-mail]>
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X-Mailer: Mozilla 3.01Gold (Win95; U)

Have heard that MFJ is came out with a compact loop antenna to cover 21
to 7 mhz. It is similar to the 10-30 mhz version. Any comments on its
performance??


From [e-mail] Wed Dec 11 19:37:51 1996
From: [e-mail] (Dennis Hinkle)
Subject: MFJ-1798 10 band vertical--fact or fiction?
Date: 6 Dec 96 19:34:20 -0800
Message-ID: <[e-mail]>
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!news.sprintlink.net!news-hub.sprintlink.net!news.sprintlink.net!news-dc-9.sprintlink.net!news.msn.com!msn.com
Newsgroups: rec.radio.amateur.antenna
Organization: The Microsoft Network (msn.com)
Lines: 4

        Does anyone have any experience and/or data on this vertical?  The
counterpoise is on the top!  What does this do to the radiation
pattern?
W8KGO


From [e-mail] Wed Dec 11 19:37:52 1996
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From: Dennis Hinkle  <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: MFJ-1798 10 band vertical: Does it work?
Date: Thu, 05 Dec 1996 17:28:17 GMT
Organization: Netcom
Lines: 3
Message-ID: <5870o7$[e-mail]>
NNTP-Posting-Host: sjx-ca77-08.ix.netcom.com
X-NETCOM-Date: Thu Dec 05  9:28:39 AM PST 1996
X-Newsreader: NETCOMplete/3.2

Help!  I am considering the MFJ-1798, but the counterpoise is at the top!  Doe
s this thing really
work?  What have you heard about it?  Anyone using it?  E-mail [e-mail].
com
Dennis W8KGO


From [e-mail] Wed Dec 11 19:37:53 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: MFJ-1798 10 band vertical: Does it work?
Date: 6 Dec 1996 07:28:57 GMT
Organization: DigiPhone Corporation, Bryan/College Station Texas 409-693-8885
Lines: 21
Message-ID: <588hvp$[e-mail]>
References: <5870o7$[e-mail]>
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NNTP-Posting-Host: usr15s5.myriad.net
X-Newsreader: IBM NewsReader/2 2.0

In <5870o7$[e-mail]>, Dennis Hinkle  <[e-mail]> w
rites:
>Help!  I am considering the MFJ-1798, but the counterpoise is at the top!  Do
es this thing really
>work?  What have you heard about it?  Anyone using it?  E-mail [e-mail]
.com
>Dennis W8KGO

Some bright soul attempted to give me one to use during Field Day for the
first hour or so until they managed to get the 3 element tri-bander up on the
50 foot tower..]

They brought it out to Field Day as a very proud contribution to the cause.

The qso rate went from about 20 an hour to about 100 an hour immediately
after the beam got hooked up.

  <huge smile>

//-----------------------------
Mike - W5WQN
[e-mail]
[e-mail]



From [e-mail] Wed Dec 11 19:37:54 1996
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From: Costas Spanos <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: MFJ-1798 10 band vertical: Does it work?
Date: Fri, 06 Dec 1996 08:45:41 -0800
Organization: Data Communication and Newtorking Services
Lines: 40
Message-ID: <[e-mail]>
References: <5870o7$[e-mail]>
NNTP-Posting-Host: samos.eecs.berkeley.edu
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To: Dennis Hinkle <[e-mail]>

Dennis Hinkle wrote:
>
> Help!  I am considering the MFJ-1798, but the counterpoise is at the top!  D
oes this thing really
> work?  What have you heard about it?  Anyone using it?  E-mail [e-mail]
m.com
> Dennis W8KGO

Dennis, I am in the process of installing one right now. It seems to
work, except the usefull bandwidth on 80m is only about 15KHz, and it is
even worse on 40m (min SWR is about 2 at ONE place you choose on the
band, everything else is unusable). The other bands tune nicely (got
full coverage on 30, 20, 17, 15, 12, 10(!) and 2). The 6m band is
touchy, I get about 1MHz of bandwidth, tunable at the top of the
antenna.

The top counterpoise looks funny, but it must work. From my west coast
QTH I get easily Japan, Australia, etc.) Very strong local contacts too,
20-30 miles away.

The antenna took about two days to put together and to tune (on a
temporary mast 6 feet off the ground). I used an SWR analyzer, and it
saved me lots of time (one caveat of the analyzer is that it will behave
very badly in the presence of any strong signals that are being received
at the antenna, so use it when the band is realtively quiet). Plan the
final location carefully, as the top counterpoise needs lots of room.
You will need an extra set of hands to help you get by trees and cables.
Also, plan on some limited retuning at the final location, since the
antenna shifts a bit, typically to higher resonant frequencies. (I am in
the process of doing this final tuning now).


Oh, and one last thing: If you plan on using the IC706, or a separate
2 meter radio, you should also buy a duplexer since the antenna has only
one feed point for all the bands.

I, too, would appreciate reading about other peoples' experiences about
the 1798.

                                                Costas

                                                KE6SYN


From [e-mail] Wed Dec 11 19:37:55 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.net!www.nntp.primenet.com!nntp.primenet.com!feed1.news.erols.com!howland.erols.net!usc!news.service.uci.edu!usenet
From: [e-mail] (Brian Williams)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: MFJ-1798 10 band vertical: Does it work?
Date: 7 Dec 1996 07:11:58 GMT
Organization: UCI Medical Center
Lines: 14
Message-ID: <58b5bu$[e-mail]>
References: <5870o7$[e-mail]> <588hvp$[e-mail]>
NNTP-Posting-Host: dialin9056.slip.uci.edu
Mime-Version: 1.0
Content-Type: Text/Plain; charset=ISO-8859-1

In article <588hvp$[e-mail]>, [e-mail] says...
>They brought it [MFJ Multi-band vertical] out to Field
>Day as a very proud contribution to the cause.

>The qso rate went from about 20 an hour to about 100 an hour immediately
>after the beam got hooked up.
>Mike - W5WQN

Well of coarse it did. I believe he was trying to compare the
MFJ antenna to other vertical antennas.  The beam with a
rotator is a whole different animal.

Brian



From [e-mail] Wed Dec 11 19:37:56 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!news-peer.gsl.net!news.gsl.net!portc01.blue.aol.com!audrey01.news.aol.com!not-for-mail
From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: microwave ant. design info.
Date: 5 Dec 1996 04:11:32 GMT
Organization: AOL http://www.aol.com
Lines: 6
Message-ID: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

I am looking for design info. on a high gain omnidirectional antenna for 2
Ghz. The antenna would be used to receive signals from tv station ENG
(news) trucks in the field. Any information would be appreciated. Thanks.

Jim Stanley
KA5HUB


From [e-mail] Wed Dec 11 19:37:57 1996
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Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.equipment,rec.radio.amateur.misc
Subject: Re: Mobile HF Webpage
Message-ID: <[e-mail]>
From: grimm <@sbc.edu>
Date: Tue, 03 Dec 1996 18:12:08 -0500
Reply-To: @sbc.edu
References: <[e-mail]>
Organization: Sweet Briar College
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Xref: news1.epix.net rec.radio.amateur.antenna:32361 rec.radio.amateur.equipment:43575 rec.radio.amateur.misc:119558

Jerry Decker wrote:
>
> Greetings,
>
>    I am setting up a webpage dedicated to Mobile HF'ing. If anyone would
> like to provide input or graphics that are on this subject, please send
> them to [e-mail]. I will give you the credit on the webpage.
>
> Thanks
> Jerry WR5V [e-mail]
> http://www.metronet.com/~jdecker


What a good idea for a web page!  I don't have anything to contribute
yet, but I will be a regular "viewer" of your page!  Good luck on your
project.

73,

Ken, K4XL    [e-mail]


From [e-mail] Wed Dec 11 19:37:58 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!feed1.news.erols.com!news.idt.net!news.stealth.net!newsfeed.uk.ibm.net!news-m01.ny.us.ibm.net!news-s01.ca.us.ibm.net!not-for-mail
From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Mosely HF Beam
Date: 10 Dec 1996 01:32:05 GMT
Lines: 11
Message-ID: <58ieil$jgq$[e-mail]>
Reply-To: [e-mail] (Butch Hinton)
NNTP-Posting-Host: slip166-72-171-200.pa.us.ibm.net
X-Newsreader: IBM NewsReader/2 2.0

Hi All,

I have the opportunity to purchase a Mosely TA33 beam and was
wondering where I could some information on this beam. I did a
search on YAHOO for Mosely and came up blank.

I know it is a 3 band beam and very popular.

Thanks for any info.

Butch [e-mail]


From [e-mail] Wed Dec 11 19:37:59 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!news.sprintlink.net!news-hub.sprintlink.net!news.sprintlink.net!news-peer.sprintlink.net!howland.erols.net!feed1.news.erols.com!phase2.worldnet.att.net!uunet!in2.uu.net!128.250.1.21!munnari.OZ.AU!news.mel.connect.com.au!news.melbpc.org.au!news
From: [e-mail] (Alan Fowler)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Near/Far fields and in between
Date: Mon, 02 Dec 1996 06:17:02 GMT
Organization: Melbourne PC User Group Inc, Australia
Lines: 28
Message-ID: <57tosa$[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: dingo40.melbpc.org.au
X-Newsreader: Forte Free Agent 1.0.82

"Cecil A. Moore" <[e-mail]> wrote:

>I'm doing some far field strength measurements. I know the near
>field falls off as the cube of the distance and the intermediate
>(induction) field falls off as the square of the distance. An RF
>handbook says that the induction field extends to one wavelength
>from a resonant dipole. Question is: how far from a dipole or
>quarter-wave vertical do I have to be to ensure that I am measuring
>mostly the far field. From what I read, seems a couple of wavelengths
>should be enough? Like 500 ft for 75m and 70 ft for 10m?

Cecil,
        It's forty years since I was involved in these measurements, but
my recollection is that serious measurements started at about 2 or 3
wavelengths from the antenna.
        I also remember seeing a plot of field strength v distance plotted
from closer in to the mast out to several wavelengths, and looking to
see where the graph became a straight line.
        You might like to make a test like that.  Remember that any
obstruction, or something that could reflect the signal, or re-radiate
it will mess up those measurements.
                        Alan.

  ,-._|\  Alan Fowler.
 /  Oz  \ Mail Address: PO Box 272, Balwyn 3103 Vic, AUSTRALIA.
 \_,--.x/ Phone: [phone]  Member, Melbourne PC User Group.
       v  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+



From [e-mail] Wed Dec 11 19:38:01 1996
Newsgroups: rec.radio.amateur.antenna
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.net!news.idt.net!feed1.news.erols.com!howland.erols.net!EU.net!usenet2.news.uk.psi.net!uknet!usenet1.news.uk.psi.net!uknet!psinntp!psinntp!sunsrvr6!jdc
From: [e-mail] (James D. Cronin)
Subject: Neat product for grounding (was Ground rod and rocks...)
Message-ID: <[e-mail]>
Sender: [e-mail] (Operator)
Organization: Northern Telecom, Network Application Systems
References: <[e-mail]> <58dv76$i26@news>
Date: Tue, 10 Dec 1996 22:17:54 GMT
Lines: 27


We have sand with no stones so the ground rods went right in.  But I
wanted a good trouble-free electrical connection.  The ground clamps
looked like they could oxidize or work loose over time.

I found a high temperature copper-phosphor-silver solder rods at a local
welding supply shop.  It melts at 1250 F and works at 1350-1400 F, just
low enough for the hotter propane torches.  After clamping the wire
to the ground rod this solder was used to make the connection one big
lump of metal.

The solder is made for joining copper refrigeration tubing.  Seems quite
strong.  There are different types, with more or less silver.  They
all melt at about the same temperature, but the rods with more silver are
easier to work with.  Of course they cost more, too.  I used rods with
5 per cent silver.  1/2 pound was $9.00.

I also tried normal bronze brazing rods.  By the time they got hot enough
to flow the copper melted...

73..Jim N2VNO

--
James D. Cronin,
Northern Telecom
[e-mail]
[e-mail] (new email address thanks to the idiots at BNR)


From [e-mail] Wed Dec 11 19:38:02 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!feed1.news.erols.com!worldnet.att.net!uunet!in2.uu.net!206.66.12.35!news-in.iadfw.net!dal04-02.ppp.iadfw.net!user
From: [e-mail] (Gerald Crenshaw)
Newsgroups: rec.radio.amateur.misc,rec.radio.amateur.antenna,rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.amateur.packet
Subject: Need and article for your club newsletter???
Date: Sat, 07 Dec 1996 07:34:58 -0600
Organization: INTERNET AMERICA
Lines: 31
Message-ID: <[e-mail]>
NNTP-Posting-Host: dal04-02.ppp.iadfw.net
Xref: news1.epix.net rec.radio.amateur.misc:119924 rec.radio.amateur.antenna:32461 rec.radio.amateur.equipment:43808 rec.radio.amateur.homebrew:21821

Hi,
  Name here is Gerry (WD4BIS) and I have been writing a column for our
club newsletter called "New Ham Partner". With the influx of No Code
Technicians on the repeater, asking the same kinds of questions I asked 20
years ago, I have been trying to answer them.
   Some of the articles are technical, some of them are general
information, but they all address subjects that our new friends are
struggling with.

I have set up a web page for these articles. On this page, I will place
the columns I have already published in past issues of our newsletter.
Doing this on a web page has advantages, the big one being that the
articles wont expire in a newsgroup, I can edit old ones or add new
columns as write them, and I wont have to send re-posts.

The Cost... I will ask that you do not edit the articles, and use my
by-line. If you use them, send me an E-mail and let me know when and
where. If you have a spare stamp mail me a copy of your newsletter to the
address on the page.

Where...  http://web2.airmail.net/gerryc/newham.html

Please bear in mind this site is still under construction and not all of
them are there yet, but they soon will be. Some of the URL's arent
resolving yet and some in reformating the text are doing funny things. But
I am still working on it


73's

Gerry Crenshaw


From [e-mail] Wed Dec 11 19:38:03 1996
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!homer.alpha.net!pacifier!trellis.wwnet.com!news.inc.net!newspump.sol.net!ddsw1!news.mcs.net!yarak.pr.mcs.net!yarak
From: The Kirby's <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Need antenna hardware/parts supplier?
Date: 6 Dec 1996 03:58:19 GMT
Organization: YARAK
Lines: 6
Distribution: world
Message-ID: <5885kr$[e-mail]>
NNTP-Posting-Host: yarak.pr.mcs.net
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 8bit
X-Newsreader: Nuntius 2.0.4_68K
X-XXMessage-ID: <[e-mail]>
X-XXDate: Thu, 5 Dec 1996 03:58:19 GMT

If anyone has the address, e-mail or URL for antenna parts suppliers your
imput would be appreciated. Tks 73 KB9NLY

   The Kirby's                               [e-mail]
 St. Charles, IL                     __________________________
     60174                         A CITIZEN IN THE STATE OF YARAK


From [e-mail] Wed Dec 11 19:38:04 1996
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!zombie.ncsc.mil!newsgate.duke.edu!interpath!news.interpath.net!news.sprintlink.net!news-fw-22.sprintlink.net!news.sprintlink.net!news-hub.sprintlink.net!news.sprintlink.net!news-peer.sprintlink.net!howland.erols.net!www.nntp.primenet.com!nntp.primenet.com!ddsw1!news.mcs.net!yarak.pr.mcs.net!yarak
From: John Kirby <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Need antenna supplies source
Date: 10 Dec 1996 00:49:13 GMT
Organization: YARAK
Lines: 7
Distribution: world
Message-ID: <58ic29$[e-mail]>
NNTP-Posting-Host: yarak.pr.mcs.net
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 8bit
X-Newsreader: Nuntius 2.0.4_68K
X-XXMessage-ID: <[e-mail]>
X-XXDate: Mon, 9 Dec 1996 00:49:12 GMT

 Need information on antenna parts/supply sources (aluminum tubing, rods,
masting, etc). If anyone has some leads, I would appreciate them. Tks 73
John KB9NLY

  The Kirby's                               [e-mail]
 St. Charles, IL                     __________________________
     60174                         A CITIZEN IN THE STATE OF YARAK


From [e-mail] Wed Dec 11 19:38:05 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!dciteleport.com!worldnet.att.net!uunet!in3.uu.net!199.249.160.130!news.csranet.com!usenet
From: Hal Rosser AE4YN <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Need insulator source
Date: Wed, 04 Dec 1996 16:50:09 -0800
Organization: CSRA Internet Services
Lines: 20
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: line048.csranet.com
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 2.0 (Win16; I)
To: [e-mail]

try this:
W4FXQ              BUFFINGTON JR, WILLIAM E                LIC ISU
31-AUG-1993
ADVANCED           1554 MONTROSE AVE EAST                  LIC EXP
31-AUG-2003
DOB 14-JUN-1930    JACKSONVILLE         FL  32210
[e-mail] wrote:
>
> I'm looking for some W4FXQ antenna insulators.  They are black plastic, 6"
> long, and 1" diameter.  They have radial fins, and the fins are arranged
> to guide the winding of a coil around the insulator, for use as the coil
> part of a trap, or just as a coil.  One side is marked with "W4FXQ" and a
> patent number.  Does anyone know where I can get some?
>
>                                                    Steve   W9HJW

--
73'S de AE4YN
Hal
[e-mail]


From [e-mail] Wed Dec 11 19:38:06 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!news.sprintlink.net!news-hub.sprintlink.net!news.sprintlink.net!news-peer.sprintlink.net!worldnet.att.net!ix.netcom.com!news
From: Steve Foster  <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: need parts for mosley 67b
Date: Tue, 10 Dec 1996 17:46:57 GMT
Organization: Netcom
Lines: 1
Message-ID: <58mohc$[e-mail]>
NNTP-Posting-Host: den-co24-11.ix.netcom.com
X-NETCOM-Date: Wed Dec 11  8:46:36 AM PST 1996
X-Newsreader: NETCOMplete/3.2

I need some parts from a mosley 67b. If you have one that you are willing to p
art out let me know. Thanks in advance. Steve WB5OMP


From [e-mail] Wed Dec 11 19:38:07 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!newspump.sol.net!ddsw1!news.mcs.net!Venus.mcs.net!aehodel
From: "Alan E. Hodel" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Need tower installer in Maryland
Date: Thu, 5 Dec 1996 09:00:48 -0600
Organization: MCSNet Services
Lines: 20
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: venus.mcs.com
Mime-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
X-Sender: [e-mail]
To: Dick Merryman <[e-mail]>
In-Reply-To: <[e-mail]>

On Wed, 4 Dec 1996, Dick Merryman wrote:

> Can anyone recommend a tower installation company that works in the
> Annapolis area?  I've exhausted the phone book and can't get any
> referrals from either HRO or MRC.
>
> Thanks for the help,
>>
>
>                       -Dick-
>
Davis Antenna, Inc. (Waldorf, MD), Buddy Davis, President, 1- 800-426-8366
will likely be able to help you or refer you someone who can.



  Alan E. Hodel  |  Internet e-mail: [e-mail]
       KW9T      |  Home Page: http://www.mcs.net/~aehodel/
 "Make things as simple as possible, but not any simpler." - A. Einstein



From [e-mail] Wed Dec 11 19:38:08 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.net!www.nntp.primenet.com!nntp.primenet.com!uwm.edu!math.ohio-state.edu!howland.erols.net!news2.digex.net!news
From: Dick Merryman <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Need tower installer in Maryland
Date: Wed, 04 Dec 1996 20:56:04 -0500
Organization: 73 from N3XRU
Lines: 9
Message-ID: <[e-mail]>
NNTP-Posting-Host: darkstar.wormhole.com
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.0 (Win95; I)

Can anyone recommend a tower installation company that works in the
Annapolis area?  I've exhausted the phone book and can't get any
referrals from either HRO or MRC.

Thanks for the help,



                        -Dick-


From [e-mail] Wed Dec 11 19:38:08 1996
Path: news1.epix.net!news3.epix.net!uunet!in1.uu.net!199.94.215.18!news.bbnplanet.com!cam-news-hub1.bbnplanet.com!news.idt.net!mr.net!news.clark.net!not-for-mail
From: [e-mail] (richard l wilder k3di)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Need tower installer in Maryland
Date: 9 Dec 1996 21:11:35 GMT
Organization: Clark Internet Services, Inc., Ellicott City, MD USA
Lines: 15
Message-ID: <58hva7$[e-mail]>
References: <[e-mail]> <[e-mail]>
NNTP-Posting-Host: 100-explorer.clark.net
Mime-Version: 1.0
Content-Type: TEXT/PLAIN; charset=ISO-8859-1
Content-Transfer-Encoding: 8bit
X-Newsreader: TIN [UNIX 1.3 950726BETA PL0]

Alan E. Hodel ([e-mail]) wrote:
: On Wed, 4 Dec 1996, Dick Merryman wrote:
:
: > Can anyone recommend a tower installation company that works in the
: > Annapolis area?  I've exhausted the phone book and can't get any
: > referrals from either HRO or MRC.
: > Thanks for the help,                        -Dick-

: Davis Antenna, Inc. (Waldorf, MD), Buddy Davis, President, 1- 800-426-8366
: will likely be able to help you or refer you someone who can.
       Alan E. Hodel  |  Internet e-mail: [e-mail]

Call Mike Cizek, KO7V at 410-757-6706.   He also knows of other tower
riggers that are members of PVRC.  73, Dick Wilder, K3DI



From [e-mail] Wed Dec 11 19:38:09 1996
From: [e-mail] (steve perron)
Newsgroups: rec.radio.amateur.antenna
Subject: Newbie needs help for dipole antenna
Date: Sat, 07 Dec 1996 04:58:33 GMT
Message-ID: <[e-mail]>
X-Newsreader: Forte Agent .99e/32.227
NNTP-Posting-Host: 206.47.174.31
Lines: 33
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.net!www.nntp.primenet.com!nntp.primenet.com!news.mindspring.com!mindspring!uunet!in1.uu.net!204.191.213.61!ott.istar!istar.net!news.nstn.ca!coranto.ucs.mun.ca!news1.bellglobal.com!endeavor.newcomm.net!206.47.174.31


        I have been collecting equipment and various hardware to get
on the air since I passed my license in October.  I have a few
questions I haven't found answers for yet.

I have an Icom 735 transceiver with the matching power supply and plan
to use a dipole antenna wich will probably be located in the attic.  I
am going to use RG8 mini-foam coax and operate mostly CW on either 20,
17 or 15m, depending how much space is available in the attic.

My questions are:

1.  What size wire (AWG) should I use to build the dipole.  I will
probably try to keep power down to avoid rfi with next wall
neighbours, which means output of less than 100w.

2.  Since I'm renting and cannot do all kind of funny things, Can I
use the incoming water pipe as rf ground.  The building is quite old
and the outlet ground is also connected to the same ground.

3.  Any suggestions or comments on what kind of rf ground to use.
Proper copper-clad rods are not easily available here(actually,
nothing is available here.  Thank god, the military will move me out
next year...)

4.  Is a transmatch required for that setup?  My 735 has a built-in
swr meter I can use to tune up the antenna.

Please understand this is my first try at this, and there is quite a
few things I am probably missing.  Any comments/suggestions would be
appreciated.

Steve Perron VO1SLP


From [e-mail] Wed Dec 11 19:38:10 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!news.sprintlink.net!news-pull.sprintlink.net!news.sprintlink.net!news-ana-7.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!newsfeed.internetmci.com!in3.uu.net!206.66.12.35!news-in.iadfw.net!dal22-09.ppp.iadfw.net!user
From: [e-mail] (cleve e massey)
Newsgroups: rec.radio.amateur.antenna
Subject: OUTBACKER ???
Date: Wed, 04 Dec 1996 16:40:56 -0600
Organization: INTERNET AMERICA
Lines: 15
Message-ID: <[e-mail]>
NNTP-Posting-Host: dal22-09.ppp.iadfw.net

In looking at the specs for the OUTBACKER JR. it could fit the bill nicely...

Especially interested (wary) of the claim that the 6 mtr. acceptable
coverage is 8 mhz...

I just saved enuf $$$ to get a hf-6mtr. radio for primary use in the
vehicle and this could be just the thing...

Any experiences out there to share???

tnx...

cleve/wd5bor

pse e-mail direct


From [e-mail] Wed Dec 11 19:38:11 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.net!news.idt.net!news.bbnplanet.com!cam-news-hub1.bbnplanet.com!uunet!in3.uu.net!204.74.114.90!news.genuity.net!news.avatar.com!avatar.avatar.com!kory
From: Kory Hamzeh <[e-mail]>
Newsgroups: rec.radio.amateur.equipment,rec.radio.amateur.antenna
Subject: Outbacker Antennas
Date: Wed, 4 Dec 1996 11:55:25 -0800
Organization: Avatar Consultants, Inc.
Lines: 13
Message-ID: <[e-mail]>
NNTP-Posting-Host: avatar.avatar.com
Mime-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Xref: news1.epix.net rec.radio.amateur.equipment:43663 rec.radio.amateur.antenna:32398


Hi,

I looking for a antenna to use for portable operations when I travel or
go on vacation. The Outbacker series of antennas look real good because
then cover 80 to 10 with no tuner. There are a bit pricey ($300 for a
whip)! I was wondering if anyone can give me any feedback on there
experiences. I will not be using it in a car.

Thanks,
Kory
AC6RN



From [e-mail] Wed Dec 11 19:38:12 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.net!www.nntp.primenet.com!nntp.primenet.com!dciteleport.com!newsfeed.internetmci.com!news.netwiz.net!news
From: [e-mail]
Newsgroups: rec.radio.amateur.equipment,rec.radio.amateur.antenna
Subject: Re: Outbacker Antennas
Date: Thu, 05 Dec 1996 02:48:08 GMT
Organization: NetWizards, Inc.
Lines: 33
Message-ID: <585d4d$[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: dial60.netwiz.net
X-Newsreader: Forte Free Agent 1.0.82
Xref: news1.epix.net rec.radio.amateur.equipment:43688 rec.radio.amateur.antenna:32406

Kory,
I like my Outbacker - It seems to be very durable. Also - You may not
know - they make a version that comes apart in 2 - 3 foot sections
I also understand they have done one in three sectons.

You could mark the adjustable tip for different band allocations 40
and 80 are narrow

Don't forget the ground and the surrounding area will affect any
antenna's tuning...

Still it is easy to tune..

Noland
WB6CKT/3D2NL/G0WZI

Kory Hamzeh <[e-mail]> wrote:


>Hi,

>I looking for a antenna to use for portable operations when I travel or
>go on vacation. The Outbacker series of antennas look real good because
>then cover 80 to 10 with no tuner. There are a bit pricey ($300 for a
>whip)! I was wondering if anyone can give me any feedback on there
>experiences. I will not be using it in a car.

>Thanks,
>Kory
>AC6RN





From [e-mail] Wed Dec 11 19:38:13 1996
From: [e-mail] (David Covert)
Subject: Phased J-Pole
Date: 2 Dec 96 20:17:09 -0800
Message-ID: <[e-mail]>
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!news.kei.com!newsfeed.internetmci.com!dciteleport.com!feed1.news.erols.com!howland.erols.net!news.sprintlink.net!news-peer.sprintlink.net!news.sprintlink.net!news-pull.sprintlink.net!news.sprintlink.net!news-atl-21.sprintlink.net!news.sprintlink.net!news-dc-2.sprintlink.net!news.msn.com!msn.com
Newsgroups: rec.radio.amateur.antenna
Organization: The Microsoft Network (msn.com)
Lines: 10


I have built a couple of J-Poles for use at the qth, and now want to
build a phased J-Pole for some UoSAT work.

Can anyone give me dimensions for phased J-Poles for 145.870 and 435.175?

Also, can anyone explain why a phased J-Pole has better gain than a
regular J-Pole?

73 de dave kb5gog


From [e-mail] Wed Dec 11 19:38:14 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!ix.netcom.com!news
From: [e-mail] (Tom McMahon)
Newsgroups: rec.radio.amateur.antenna
Subject: Plot to Control the Airwaves
Date: Sat, 07 Dec 1996 23:04:28 GMT
Organization: Netcom
Lines: 30
Message-ID: <[e-mail]>
NNTP-Posting-Host: frm-ma3-15.ix.netcom.com
X-NETCOM-Date: Sat Dec 07  5:06:45 PM CST 1996
X-Newsreader: Forte Free Agent 1.1/32.230

Please forgive the sensationalist title, and the misposting if this is
the wrong group, but I didn't know where else to turn.

Here's my problem:
I have a very nice Yamaha T-520 AM/FM receiver which is about ten
years old. But recently, say within the past year or two, it statics
out and loses its FM signal regularly. The curious thing is that AM
still works fine, and I'm in what they used to call a "fringe" area,
about 35 miles from Boston.

First, I brought the thing back to Tweeter, etc., where I bought it.
They held on to it for a long time, and said that, after an extended
bench test (and a signifigant bench charge),  they couldn't find
anything wrong with it. Their testing bench, by the way is very near
Boston, which makes me wonder if my problem is location.

So next, I invested in a low-end TV/FM antenna, hung it in the attic
and coax-ed it to my receiver. Still no luck, yet the AM which is
separately dipoled seems to work fine.

My question:
Is it possible that the proliferation of Cell-Phone towers and Cable
TV receiving locations has just messed up the FM reception in my area?
Is there a solution that can allow me to keep using my classic (the
guys at Tweeter ooohed and aahhed - don't make 'em like they used to
and so on) T-520? Should I just try another repair shop? Tweeter is
huge and supposedly very good, but who knows?

Thanks for your help.



From [e-mail] Wed Dec 11 19:38:15 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!ais.net!news.texas.net!news.kei.com!newsfeed.internetmci.com!feed1.news.erols.com!howland.erols.net!surfnet.nl!news.unisource.nl!news.worldonline.nl!usenet
From: Leo Potjewijd <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Plot to Control the Airwaves
Date: 8 Dec 1996 09:02:12 GMT
Organization: Lazy Lion
Lines: 45
Message-ID: <58e06k$[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: asd3-p47.worldonline.nl
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 1.22KIT (Windows; I; 16bit)
To: [e-mail]

At dec.7, [e-mail] (Tom McMahon) wrote:
>Please forgive the sensationalist title, and the misposting if this is
>the wrong group, but I didn't know where else to turn.
>
>Here's my problem:
>I have a very nice Yamaha T-520 AM/FM receiver which is about ten
>years old. But recently, say within the past year or two, it statics
>out and loses its FM signal regularly. The curious thing is that AM
>still works fine, and I'm in what they used to call a "fringe" area,
>about 35 miles from Boston.
>
-snip-
>
>My question:
>Is it possible that the proliferation of Cell-Phone towers and Cable
>TV receiving locations has just messed up the FM reception in my area?
>Is there a solution that can allow me to keep using my classic (the
>guys at Tweeter ooohed and aahhed - don't make 'em like they used to
>and so on) T-520? Should I just try another repair shop? Tweeter is
>huge and supposedly very good, but who knows?
>
>Thanks for your help.
>
Well Tom,

it may be possible that the first amplifier stage in the FM receiver gets
overloaded with other signals that are not part of the broadcast band.
This leads to a reduction in sensitivity.

In order to keep the unwanted signals out you must use a filter as close
to the receiver as possible. A low-pass filter with a cutoff frequency
of, say 110 MHz, will keep all the cellular phone garbage out of the
receiver. If there are large transmitters in your vicinity that produce
frequencies _below_ 80 MHz you will need a band-pass filter of 80-110
MHz.

I do not have plans for these filters at hand, but their construction
(especially the low-pass one) is not all that difficuilt. Look in _any_
ARRL handbook in the 'filters' section and you'll find ample information.

Another idea is to get a duplexer for use with a car radio (2m and FM on
one antenna), this also is a low-pass filter for the FM-band.

Good luck, Leo.



From [e-mail] Wed Dec 11 19:38:16 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!nntp.primenet.com!news.bbnplanet.com!su-news-hub1.bbnplanet.com!pacbell.com!ihnp4.ucsd.edu!news1.ucsd.edu!news-mail-gateway
From: [e-mail] (JAMES MCEWEN)
Newsgroups: rec.radio.amateur.antenna
Subject: RE: Plot to Control the Airwaves
Date: 11 Dec 96 06:40:15 GMT
Organization: ucsd usenet gateway
Lines: 23
Message-ID: <[e-mail]>
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]

     TOM wrote:
     > I have a very nice Yamaha T-520 AM/FM receiver which is about
     > ten years old. But recently, say within the past year or two,
     > it statics out and loses its FM signal regularly.


     If you haven't done it yet, you might see if a portable FM radio
     at your location shows the same kind of fade/interference
     problem, either when tuned to the same station, or a nearby
     station.  Does this happen all across the band to you or is it
     localized to one station?  Does your receiver have a mono stereo
     switch?  Does it happen when you are in mono & stereo mode both?
     Sometimes if the signal is just too "fringe" the stereo decoder
     doesn't work as it should, or if there is a strong nearby station
     coming in on the next frequency over, it can "pull" the frequency
     you are receiving, causing the receiver to detune a bit.  You
     might try putting your antenna "broadside" to the direction of
     the station you desire, and see if this helps, too.  All these
     things are part of the "FM section" of your radio, so they
     wouldn't show up when you use the AM portion.

     Jim KA6TPR



From [e-mail] Wed Dec 11 19:38:17 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!news.kei.com!newsfeed.internetmci.com!howland.erols.net!news-peer.gsl.net!news.gsl.net!news-dc.gsl.net!news.gsl.net!news.sprintlink.co.za!osprey.global.co.za!news
From: [e-mail] (Steven)
Newsgroups: alt.radio.uk,rec.radio.amateur.antenna,rec.radio.amateur.equipment,rec.radio.amateur.misc
Subject: Portable Antenna Analyzer,   7MHz to  510MHz SWR direct
Date: Tue, 03 Dec 1996 19:28:48 GMT
Organization: Global Internet Access
Lines: 15
Message-ID: <582dem$[e-mail]>
NNTP-Posting-Host: mdm-po10.jhba-anx3.net.global.co.za
X-Newsreader: Forte Free Agent v0.55
Xref: news1.epix.net alt.radio.uk:9448 rec.radio.amateur.antenna:32358 rec.radio.amateur.equipment:43573 rec.radio.amateur.misc:119555

I have a portable Antenna Analyzer for sale.
It is a portable unit run from NiCad batteries
with charger. It uses a LCD 4 digit frequency
counter, an analogue SWR / %reflected power scales
read direct. No radio Transmitter needed. It sees
exactly what the radio sees.
Only R2495-00. New, 1 year guarantee.
Ideal for the antenna experimenter.

Call Rob @ [phone]  Fax [phone]
[phone]
Fax  (011)  882-1122          South Africa
(Johannesburg)
or Email [e-mail]



From [e-mail] Wed Dec 11 19:38:18 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!ix.netcom.com!news
From: [e-mail] (larry wolken)
Newsgroups: alt.radio.uk,rec.radio.amateur.antenna,rec.radio.amateur.equipment,rec.radio.amateur.misc
Subject: Re: Portable Antenna Analyzer,   7MHz to  510MHz SWR direct
Date: Sun, 08 Dec 1996 10:40:01 GMT
Organization: Netcom
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[e-mail] (Steven) wrote:

>I have a portable Antenna Analyzer for sale.
>It is a portable unit run from NiCad batteries
>with charger. It uses a LCD 4 digit frequency
>counter, an analogue SWR / %reflected power scales
>read direct. No radio Transmitter needed. It sees
>exactly what the radio sees.
>Only R2495-00. New, 1 year guarantee.
>Ideal for the antenna experimenter.

>Call Rob @ [phone]  Fax [phone]
>[phone]
>Fax  (011)  882-1122          South Africa
>(Johannesburg)
>or Email [e-mail]
==========================================
Yes Rob but how many zloty would that be?




From [e-mail] Wed Dec 11 19:38:19 1996
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From: Paul Heylman <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Powered antenna for FM reception
Date: Tue, 03 Dec 1996 15:41:10 -0500
Organization: Erol's Internet Services
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Several rooms at one end of my house receive only one (nearby) station,
that steps on every other station.  I am trying to get a relatively weak
station in one of the affected rooms.  I purchased a powered antenna,
set it up in another room (with better reception) and ran the signal
through speaker (16 gauge) wire back to the radio.  I get a better
signal, but far from clear.  I assume that signal strength will degrade
the farther away I put the antenna (inverse square of distance?), so I
should try to place it in the closest room with a decent signal.
However, I would appreciate any other suggestions.


From [e-mail] Wed Dec 11 19:38:20 1996
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From: [e-mail] (Hank Kahrs)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: QST MOBILE
Date: Mon, 02 Dec 1996 18:50:48 GMT
Organization: CMDS News machine
Lines: 29
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UN93B <[e-mail]> wrote:

>A year or two ago QST published an article that
>compared a half a dozen mobile antennas.
>One of them was the bugcatcher.
>  Does anyone know which issue it was in?

>Thanks,

>Brett

Bret,
I cant help you with the issue....but dont try to generalize the
results from the article.  There were too many variables that were not
considered.  The biggest variable was possibly the installation on
different vehicles.  I have yet to pu a mobile on a car without
introducing some sort of directivity into the ant pattern.  It is
usually in the direction of the "long" ground plane.  For example:
mount on the rear...directivity toward the front.  If your looking for
a mobile antenna my choice after too many years of mobiling and
working all the counties in the US...mobile-to-mobile...is still a big
center loaded whip.  Use a big coil.  If it sounds like a
bugsmahser...well its the best out there now.  Others have preceeded
it tho.  The tapping arrangement of the new Stealth ant is great.  So
I combine the 2...TX Bugcatcher with the Stealth taps.  FWIW

73, Hank/K2UVG
[e-mail]



From [e-mail] Wed Dec 11 19:38:20 1996
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From: "Chuck (Jack) Hawley" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: QST MOBILE
Date: Mon, 02 Dec 1996 17:44:10 -0600
Organization: University of Illinois at Urbana-Champaign
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Hank Kahrs wrote:
>
> UN93B <[e-mail]> wrote:
>
> >A year or two ago QST published an article that
> >compared a half a dozen mobile antennas.
> >One of them was the bugcatcher.
> >  Does anyone know which issue it was in?
>
> >Thanks,
>
> >Brett

> it tho.  The tapping arrangement of the new Stealth ant is great.  So
> I combine the 2...TX Bugcatcher with the Stealth taps.  FWIW
>
> 73, Hank/K2UVG
> [e-mail]

I see you're not using the stealth coil but what do you think of it
being made of stainless steel wire?

Chuck, KE9UW



From [e-mail] Wed Dec 11 19:38:21 1996
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From: Cecil Moore <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: QST MOBILE
Date: Mon, 02 Dec 1996 16:14:02 -0800
Organization: Intel Corporation
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Hank Kahrs wrote:
> The tapping arrangement of the new Stealth ant is great.

Hi Hank, could you describe the tapping arrangement?

73, Cecil, W6RCA, OOTC


From [e-mail] Wed Dec 11 19:38:23 1996
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From: Joe <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: QST MOBILE
Date: Tue, 03 Dec 1996 14:07:39 -0800
Organization: Hi from Taipei TAIWAN !!!
Lines: 26
Message-ID: <[e-mail]>
References: <[e-mail]> <57v8d6$[e-mail]> <[e-mail]>
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To: Cecil Moore <[e-mail]>

> Cecil Moore wrote:
> > Hank Kahrs wrote:
> > The tapping arrangement of the new Stealth ant is great.
> Hi Hank, could you describe the tapping arrangement?
> 73, Cecil, W6RCA, OOTC

Hi Cecil,
From what I've heard, it is somewhat similar to the "outbacker"
antennas -- it uses a combination of banana plugs and sockets
as opposed to the bugcatcher which uses metal flanges and alligator
clips.

I agree with Hank -- this seems much better than the bugcatcher
tap arrangement.  However, I think the stainless steel coil wire
is less than ideal.  I have a 1960's bugcatcher, and it uses
a copper coil (coated with tin, if I recall).   Works well.

I think the Stealth coil is a larger diameter (5 or 6 inches) rather
than the 3 to 4 inch coil diameter of the bugcatcher.
Joe
----------------------------------------------------------
Amateur Radio:  BV/N0IAT   Taipei TAIWAN Republic of China
    http://www.transend.com.tw/~joentam/index1.html
ex.  7J1AOF (Japan)  YU3/N0IAT (Slovenia)  KA0ZDH (Novice)
Licensed Radio Amateur since 1986.  Comments are mine only.
----------------------------------------------------------


From [e-mail] Wed Dec 11 19:38:24 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: QST MOBILE
Date: 3 Dec 1996 19:51:05 GMT
Organization: America Online, Inc. (1-800-827-6364) (1.14)
Lines: 24
Message-ID: <[e-mail]>
References: <[e-mail]>
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In article <[e-mail]>, [e-mail] (W6KKT
Jesse) writes:

>Hi Chuck, base impedance measurements using the "Stealth" stainless
>steel coil was 39 ohms compared to the "Bugcatcher" 4" coil (18 ohm)
>on 3995kc.  In my opinion, using a stainless steel coil is a very bad
>idea.
>73, Jesse, W6KKT

I agree totally with Jesse.

I have done FS measurements and impedance measurements here. The best
system is top loaded with a large hat at the top, coil placement is almost
unimportant when a large hat is used at the very top.

With no hat, center to top loading is best.

Stainless steel coils stink (unless thickly plated with silver or copper),
and a coil physically **too large** can be as bad as a physically small
coil. In my experience, coil Q peaks when the conductor is between #12 and
#8 AWG. Bigger is NOT always better (unless perhaps it's a hat at the very
top of the antenna).

73 Tom


From [e-mail] Wed Dec 11 19:38:25 1996
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From: [e-mail] (Hank Kahrs)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: QST MOBILE
Date: Tue, 03 Dec 1996 15:18:51 GMT
Organization: CMDS News machine
Lines: 22
Message-ID: <581gbo$[e-mail]>
References: <[e-mail]> <57v8d6$[e-mail]> <[e-mail]>
NNTP-Posting-Host: 204.49.40.130
X-Newsreader: Forte Free Agent 1.0.82

"Chuck (Jack) Hawley" <[e-mail]> wrote:

>I see you're not using the stealth coil but what do you think of it
>being made of stainless steel wire?

>Chuck, KE9UW

Chuck,
I talked at length with the Stealth folks...they REALLY like their
antennas.  Price much higher than TX Bugcatcher.  The developer is a 4
wheel drive...Jeep...person who mobiled and broke lots of antennas in
the woods.  Stay out of the woods and the Bugsmasher will do just
fine.  I have been back there with my K5 Blazer and it has survived
too many years to thik about!



73, Hank/K2UVG
[e-mail]
http://www.nfds.net/~nkahrs/k2uvg.html




From [e-mail] Wed Dec 11 19:38:26 1996
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From: [e-mail] (Hank Kahrs)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: QST MOBILE
Date: Tue, 03 Dec 1996 15:32:01 GMT
Organization: CMDS News machine
Lines: 35
Message-ID: <581h4f$[e-mail]>
References: <[e-mail]> <57v8d6$[e-mail]> <[e-mail]>
NNTP-Posting-Host: 204.49.40.130
X-Newsreader: Forte Free Agent 1.0.82

Cecil Moore <[e-mail]> wrote:

>Hank Kahrs wrote:
>> The tapping arrangement of the new Stealth ant is great.

>Hi Hank, could you describe the tapping arrangement?

>73, Cecil, W6RCA, OOTC

Cecil,
Lets see if I can do it justice.  First Fortex Industries is a NC
machine shop that builds the Stealth on the side so to speak.  The tap
arrangement is through the use of a bannana plug.  This is much easier
that the TX BC spade taps.  They start with a 1/4-20 stainless bolt
and machine lengthwise from the thread end a hole the size of the
banana plug.  The head of the bolt is machined to a small J-hook.
There is a "plastic" knob that has 1/4-20 threads that is screwed over
the threads of the bolt.  Installation is just hooking the J-hook at
the tap point of the coil and tightning the plastic knob which bears
on about 3 windings of the coil...the tapped winding and one above and
below that.  A pigtail from the coil end with a banana plug completes
the installation.

Hope this helps.  I asked the TX BC folks if they were going to do
something like that and the answer was no.  So now I have a mixed
breed ant...hi.  My mount is an Outbacker mount so I kinda spread the
wealth around.



73, Hank/K2UVG
[e-mail]
http://www.nfds.net/~nkahrs/k2uvg.html




From [e-mail] Wed Dec 11 19:38:27 1996
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From: [e-mail] (W6KKT Jesse)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: QST MOBILE
Date: Tue, 03 Dec 1996 15:13:53 GMT
Organization: Microserve Information Systems (800)-380-INET
Lines: 30
Distribution: world
Message-ID: <[e-mail]>
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On Mon, 02 Dec 1996 17:44:10 -0600, "Chuck (Jack) Hawley"
<[e-mail]> wrote:

>Hank Kahrs wrote:
>>
>> UN93B <[e-mail]> wrote:
>>
>> >A year or two ago QST published an article that
>> >compared a half a dozen mobile antennas.
>> >One of them was the bugcatcher.
>> >  Does anyone know which issue it was in?
>>

QST: Sept 1995 has the article you are looking for . Also, World Radio

Sept, 1995 has a article on the Esparto, Ca shootout.
73, Jesse, W6KKT .


>I see you're not using the stealth coil but what do you think of it
>being made of stainless steel wire?
>
>Chuck, KE9UW>

Hi Chuck, base impedance measurements using the "Stealth" stainless
steel coil was 39 ohms compared to the "Bugcatcher" 4" coil (18 ohm)
on 3995kc.  In my opinion, using a stainless steel coil is a very bad
idea.
73, Jesse, W6KKT



From [e-mail] Wed Dec 11 19:38:28 1996
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From: [e-mail] (Dick Hughes)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: QST MOBILE
Date: Tue, 03 Dec 1996 21:54:49 GMT
Organization: Oregon Public Networking
Lines: 50
Message-ID: <[e-mail]>
References: <[e-mail]> <57v8d6$[e-mail]> <[e-mail]>
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On Tue, 03 Dec 1996 15:13:26 GMT, [e-mail] (W6KKT Jesse)
wrote:

>On Mon, 02 Dec 1996 18:50:48 GMT, [e-mail] (Hank Kahrs) wrote:
>
>
>>Bret,
>>I cant help you with the issue....but dont try to generalize the
>>results from the article.  There were too many variables that were not
>>considered.  The biggest variable was possibly the installation on
>>different vehicles.  I have yet to pu a mobile on a car without
>>introducing some sort of directivity into the ant pattern.  It is
>>usually in the direction of the "long" ground plane.  For example:
>>mount on the rear...directivity toward the front.  If your looking for
>>a mobile antenna my choice after too many years of mobiling and
>>working all the counties in the US...mobile-to-mobile...is still a big
>>center loaded whip.  Use a big coil.  If it sounds like a
>>bugsmahser...well its the best out there now.  Others have preceeded
>>it tho.  The tapping arrangement of the new Stealth ant is great.  So
>>I combine the 2...TX Bugcatcher with the Stealth taps.  FWIW
>>
>>73, Hank/K2UVG
>>[e-mail]
>>
>Hi Hank, the purpose of the 75 meter mobile trials is to give the
>un-informed a general idea the difference between  mobile antenna
>designs, and to promote hf mobile.  From the measurement data one can
>determine the penality in Db between antenna type.  After conducting
>field strength measurements on over 100, 75m mobile installations one
>thing is clear;  BASE LOADING IS WORSE, CENTER LOADING OR HIGHER IS
>BEST,AND LESS COIL REACTANCE IS WONDERFUL!
>You state, you have experienced much difference in front to back
>directivity on 75m, between different installations.  What was your
>measurement technique?  Using very accurate equipment I have found no
>more than 0.25 db f/b on 75 meters .
>As I stated in previous threads, the only antenna that will beat a
>good center loaded (Hi Q coil) no capacity hat system, is the same
>system with a capacity hat (less coil reactance).
>On 75 meters I have worked over 50 countries SSB and last year worked
>the first known Japan to US mobile to mobile. My friend K6MB has over
>120 countries 75m ssb mobile. Several mornings ago I had a nice qso
>with Burma on 75 ssb mobile.
>If one lives in a condo or has CC&R restrictions, hf mobile is the way
>to go.
>73, Jesse, W6KKT
>

What kind of rig are you using Jesse?

Dick Hughes


From [e-mail] Wed Dec 11 19:38:30 1996
Path: news1.epix.net!news3.epix.net!uunet!in1.uu.net!169.132.11.200!news.idt.net!mr.net!news-out.microserve.net!news-in.microserve.net!not-for-mail
From: [e-mail] (W6KKT Jesse)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: QST MOBILE
Date: Tue, 03 Dec 1996 15:13:26 GMT
Organization: Microserve Information Systems (800)-380-INET
Lines: 43
Distribution: world
Message-ID: <[e-mail]>
References: <[e-mail]> <57v8d6$[e-mail]>
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X-Newsreader: Forte Agent .99e/16.227

On Mon, 02 Dec 1996 18:50:48 GMT, [e-mail] (Hank Kahrs) wrote:


>Bret,
>I cant help you with the issue....but dont try to generalize the
>results from the article.  There were too many variables that were not
>considered.  The biggest variable was possibly the installation on
>different vehicles.  I have yet to pu a mobile on a car without
>introducing some sort of directivity into the ant pattern.  It is
>usually in the direction of the "long" ground plane.  For example:
>mount on the rear...directivity toward the front.  If your looking for
>a mobile antenna my choice after too many years of mobiling and
>working all the counties in the US...mobile-to-mobile...is still a big
>center loaded whip.  Use a big coil.  If it sounds like a
>bugsmahser...well its the best out there now.  Others have preceeded
>it tho.  The tapping arrangement of the new Stealth ant is great.  So
>I combine the 2...TX Bugcatcher with the Stealth taps.  FWIW
>
>73, Hank/K2UVG
>[e-mail]
>
Hi Hank, the purpose of the 75 meter mobile trials is to give the
un-informed a general idea the difference between  mobile antenna
designs, and to promote hf mobile.  From the measurement data one can
determine the penality in Db between antenna type.  After conducting
field strength measurements on over 100, 75m mobile installations one
thing is clear;  BASE LOADING IS WORSE, CENTER LOADING OR HIGHER IS
BEST,AND LESS COIL REACTANCE IS WONDERFUL!
You state, you have experienced much difference in front to back
directivity on 75m, between different installations.  What was your
measurement technique?  Using very accurate equipment I have found no
more than 0.25 db f/b on 75 meters .
As I stated in previous threads, the only antenna that will beat a
good center loaded (Hi Q coil) no capacity hat system, is the same
system with a capacity hat (less coil reactance).
On 75 meters I have worked over 50 countries SSB and last year worked
the first known Japan to US mobile to mobile. My friend K6MB has over
120 countries 75m ssb mobile. Several mornings ago I had a nice qso
with Burma on 75 ssb mobile.
If one lives in a condo or has CC&R restrictions, hf mobile is the way
to go.
73, Jesse, W6KKT



From [e-mail] Wed Dec 11 19:38:31 1996
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From: "Cecil A. Moore" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: QST MOBILE
Date: Wed, 04 Dec 1996 19:52:36 -0700
Organization: Delphi Internet Services Corporation
Lines: 8
Message-ID: <[e-mail]>
References: <[e-mail]> <57v8d6$[e-mail]> <[e-mail]> <[e-mail]>
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Joe wrote:
> ...it (Stealth) uses a combination of banana plugs and sockets as
> opposed to the bugcatcher which uses metal flanges and alligator clips.

Hi Joe, that's strange - my homemade bugcatcher uses banana plugs. It's
certainly not hard to solder a banana socket onto a bugcatcher coil.

73, Cecil, W6RCA, OOTC


From [e-mail] Wed Dec 11 19:38:32 1996
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From: [e-mail] (Chris)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Quad feed
Date: Mon, 02 Dec 96 23:04:07 GMT
Organization: Quark, Strangeness and Charm
Lines: 16
Message-ID: <[e-mail]>
References: <[e-mail]> <57tb40$1bsi$[e-mail]>
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In article <57tb40$1bsi$[e-mail]> [e-mail]  writes:

>   The gamma match method is a very fine way to feed your quad. HyGain used
>  it for years on the HyQuad. How many of you remember that one? I've got one
>  here. I also used a gamma on my old GEM Quad when I couldn't get it matched
>  by toying with tuned coax stubs.


Given the almost symmetric nature of the quad, as opposed to a dipole,
would a gamma match provide an unbalanced feed? After all, if the quad was
slightly distorted so that the elements were round instead of square then the
gamma match would be indistinguishable from a delta match.

--
Chris



From [e-mail] Wed Dec 11 19:38:33 1996
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From: "Wendell - W5FL" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Query: 2 el 5 band Cubical Quad
Date: 3 Dec 1996 06:39:52 GMT
Organization: Wyly Enterprises
Lines: 25
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I am planning to buy or build a 2 element cubical quad with 5 bands
(10,12,15,17,20) and feed each loop independently through a switch box.
For the past 21 years I have had a 2 element 3 band (10,15,20) quad with
better results than my previous tri-bander that I used before that.

Question 1.  Does anyone have a computer analysis of a hf two element,
multiband quad that they could either e-mail me the analysis results
including spacing and wire lengths for elements, pattern, vswr, input
impedance, f/b,etc.  If a public domain program will run the input data and
you send me the input file and a few directions that would be even better.
I will buy the kit from Cubex, use #14 stranded copperweld elements, single
piece 13 foot fiberglass spreaders, and tune the quad for cw operation (but
that usually also covers phone bands).

Question 2.  Is there a better way to get 5 bands for dx work other than
with a quad?  This will go up on a 64 foot Rohn 45 Foldover which is rated
for 135 pounds for the antenna,mast and rotator load.  I was originally
trying to purchase the 5BA from Force 12 or the TH11DX from Hi-Gain.  These
seem like a lot more wind resistance for the same amount of gain, but I
would certainly be interested in any facts to the contrary.

Please reply directly to me, and if you also subscribe to towertalk, please
let me know so this message won't be cross posted.
--
Wendell Wyly - W5FL          [e-mail]


From [e-mail] Wed Dec 11 19:38:34 1996
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From: [e-mail] (Jorge)
Newsgroups: es.rec.radio.amateur,rec.radio.amateur.antenna,rec.radio.amateur.homebrew
Subject: Question on HF mobile
Date: Mon, 09 Dec 1996 21:48:59 GMT
Organization: Lander Internet
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Xref: news1.epix.net es.rec.radio.amateur:652 rec.radio.amateur.antenna:32545 rec.radio.amateur.homebrew:21903


Dear friends I have one question and want you to help me. I
own a Icom 706 rig and two sticks for 20 and 40 meters. The
antennas are Valor Pro-am 3/8" conectors and they provide me
very good performance when used with a single magnet mount
on the roof of my 1990 Ford Fiesta car. The problem is that
I can not use it when moving the car because of the poor
catch of me magnet mount. I have tried several times to
mount the aerials in a hatchback mount, but performance and
SWR are very bad indeed. I donnot know how to improve it or
how to use it on the move. The aerials are almost 2 meters
long, half helicoidal half steel stick.
Also will be wellcome any mods, commnets, improvements or
anything about the ICOM 706 rig, how much power can it run,
etc.
Sorry for my English, thanks for your help.


           /|\
           @ @
  -----oOO-(_)-OOo----------------------------------------------------------
  e-mail: [e-mail]


From [e-mail] Wed Dec 11 19:38:35 1996
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From: [e-mail] (Roger A. Quon)
Newsgroups: rec.radio.amateur.antenna
Subject: Radio Clubs in Philadelphia
Date: 10 Dec 1996 17:30:24 GMT
Organization: University of Pennsylvania
Lines: 11
Message-ID: <58k6ng$[e-mail]>
NNTP-Posting-Host: red.seas.upenn.edu
X-Newsreader: TIN [version 1.2 PL2-upenn1.3]

Hi

I was hoping if anyone could give me a contact for Amateur Radio
Clubs in the Philadelphia Area. Please e-mail me directly


        [e-mail]

Thanks,

Roger


From [e-mail] Wed Dec 11 19:38:36 1996
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From: Bernd Cebulski <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: References for non-center fed antennas wanted?
Date: Tue, 10 Dec 1996 14:27:28 -0600
Organization: University of Wisconsin Madison
Lines: 14
Message-ID: <[e-mail]>
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Hi folks,

I'm looking for some references (books, articles, internet) about
asymmetrical feed antennas with any length (not only n*lambda/2).
Especially the calculation of current distribution and/or self-impedance
is of interest but also examples or NEC files related to this subject.

Thanks for reading.

73, Bernd.

--
Bernd Cebulski W9/DL1DTP
EMail:  [e-mail]


From [e-mail] Wed Dec 11 19:38:37 1996
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From: [e-mail] (Barry Anderson)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Rutland Arrays
Date: Mon, 2 Dec 1996 15:47:02 -0500
Organization: Anderson Desktop Publishing
Lines: 19
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: dcc02685.slip.digex.net
X-Newsreader: MicroPlanet Gravity v1.01

In article <[e-mail]>, [e-mail]
says...
> I am looking for any info regarding what happened to Rutland Arrays. I
> know that Tom Rutland (K3IPW) passed away in 1995 and the company was
> bought by a gentleman in VA. I would like to know if this company is
> still in business

Mike ...

   The business was bought, but there were some improprieties that
developed. Lawsuits ensued and the public suffers. Tom's widow is still
attempting to straighten out the mess. There are a few other things going
on also, such as people attemting to produce the antenna with a few
modifications to keep them out of court. A few of the antenna designs
that Rutland sold can still be purchases through Downeast Microwave.
--
Barry Anderson K3SUI
Frederick, MD. 21702
[e-mail]


From [e-mail] Wed Dec 11 19:38:38 1996
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From: Wayne Prather <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Rutland Arrays
Date: Mon, 02 Dec 1996 15:57:34 -0800
Organization: fishnet.net
Lines: 5
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
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I have the rutland 432 ant. it was put togather and the gain measured at
a vhf conference but never put up and used. its in three pieces and
cannot be shipped but i will deliver to TRW if anyone is interested in
buying it. its aprox 33ft long @20 db gain. make realistic offer
        Wayne  KO6IO


From [e-mail] Wed Dec 11 19:38:39 1996
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From: [e-mail] (KW5Q)
Newsgroups: rec.radio.amateur.antenna
Subject: SbFFT1.2 SB16 spectrum & filtering   BETTER GRAPHICS SUPPORT
Date: Fri, 06 Dec 96 03:40:50 GMT
Organization: Adhesive Media, Inc.
Lines: 45
Message-ID: <5884m0$1s5$[e-mail]>
NNTP-Posting-Host: net-3-121.austin.eden.com
X-Newsreader: News Xpress Version 1.0 Beta #4

I have uploaded to Simtel.Net:

http://www.simtel.net/pub/simtelnet/msdos/hamradio/sbfft12.zip
ftp://ftp.simtel.net/pub/simtelnet/msdos/hamradio/sbfft12.zip   1558410 bytes

sbfft12.zip     Sound Blaster spectral display & filtering

Features:
 * Sound Blaster 16 (or 100% compatible) input and output.
 * Band widths of 2K, 4K, 8K or 16K Hz.
 * Spectral resolutions of 1 Hz to 16 Hz per pixel.
 * Display of power spectral density with any of 4 color maps in either
     linear or logarithmic scale.
 * Define and use up to six filters simultaneously -- band pass, band
     stop, low pass, and high pass.  Filters have 25 Hz skirts at 3 to 50
     dB points.
 * Filters are defined graphically by mouse movement based upon the
     displayed spectrum.  Once you see a signal, you can quickly define a
     pass or stop filter around the signal by clicking and dragging the
     mouse.
 * Net filter passband is displayed at all times.
 * Filters can be selectively enabled and disabled by a single keystroke
     or mouse click.

Special requirements: DOS 3.0 or higher, SB16 or 100% compatible, SVGA,
VESA 640x480 & 1024x768, mouse, 486/66 or higher to display spectra,
Pentium 120 or higher to filter.

Changes: Differences from version 1.1:
 * Compatible with many more graphics cards.
 * Full screen mouse support with faster response at high resolutions.
 * Mouse click to enable/disable and delete filters.
 * Defaults are assumed for the Blaster environment variable.
 * Support for PCX graphics files instead of TIFF.

Freeware.  Uploaded by the author.

Kevin McWilliams, KW5Q, Applied Mathematician
[e-mail]

$$e^{-\frac12 K^2} \frac d{dK} e^{\frac12 K^2}e^{\sqrt{in}}$$
Kevin McWilliams
KW5Q
Applied Mathematician



From [e-mail] Wed Dec 11 19:38:40 1996
Newsgroups: rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.swap,rec.radio.amateur.antenna,sci.electronics.equipment
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From: [e-mail] (innovative technologies)
Subject: search for solid state Grid Dip Meter
X-Nntp-Posting-Host: p6.ta3.actcom.co.il
Message-ID: <[e-mail]>
Sender: [e-mail] (News)
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Xref: news1.epix.net rec.radio.amateur.equipment:43574 rec.radio.amateur.homebrew:21696 rec.radio.swap:97969 rec.radio.amateur.antenna:32360 sci.electronics.equipment:9445

Hi All,

We're still looking for a solid state Grid Dip Meter (preferably the
Millen Solid State version). Delivery is to Israel.
Can anyone help?



(PS: When responding, please email directly in addition to posting
here, so that no responses are missed).

best regards,

        Innovative Technologies
        Telecom, Multimedia and VoiceMail products
        and home of the TYIN utilities.
        email: [e-mail]
        WWW:   http://www.israel.net/innovative/



From [e-mail] Wed Dec 11 19:38:41 1996
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From: [e-mail] (Dean T. Miller)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: search for solid state Grid Dip Meter
Date: 4 Dec 1996 17:04:18 GMT
Organization: Miller and Associates
Lines: 19
Message-ID: <[e-mail]>
References: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: slppp22.dsmnet.com
X-Newsreader: OUI TE 1.5

In article <[e-mail]>, From
[e-mail] (innovative technologies), the
following was written: > We're still looking for a solid state Grid Dip
Meter (preferably the > Millen Solid State version). Delivery is to
Israel.

Hi IT,

MFJ Enterprises sells a solid state 'Grid' dip meter.  Their address is:

MFJ Enterprises, Inc.
PO Box 494
Mississippi State  MS  39762

Phone:  [phone]
Fax:    [phone]

I don't know if they have a WWW page.



From [e-mail] Wed Dec 11 19:38:41 1996
Path: news1.epix.net!news3.epix.net!uunet!in1.uu.net!199.232.240.5!news.ziplink.net!zip1.ziplink.net!not-for-mail
From: [e-mail] (Thomas Mahanna)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: SPICE model for standard diple?
Date: 3 Dec 1996 04:04:07 -0500
Organization: ZIPNET.NET
Lines: 16
Message-ID: <580qe7$[e-mail]>
References: <57iiae$[e-mail]> <57jedm$[e-mail]>
NNTP-Posting-Host: zip1.ziplink.net
X-Newsreader: TIN [version 1.2 PL2]

: An interesting question. A series RLC will do a reasonable job over a
: narrow frequency range, but I'd think you'd need a model which includes a
: transmission line and frequency-dependent resistance for a model which
: extends to several bands. There must be some lumped component models for
: intermediate cases -- I'd be interested in knowing what they look like.

Hi Roy,
        Thank you for the reply. Here's where I get confused. A series
RLC is a passive device. Do I drive it with a generator, such as an AC
voltage source? If so what would the voltage be, 0.1 microvolt? Radio
signals reach an antenna with power on the order of femtowatts. So can I
model an antenna as femtowatt power generator at the desired frequency?
This is driving me crazy...

-Tom



From [e-mail] Wed Dec 11 19:38:43 1996
Newsgroups: rec.radio.amateur.antenna
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.net!www.nntp.primenet.com!nntp.primenet.com!su-news-hub1.bbnplanet.com!news.bbnplanet.com!cam-news-hub1.bbnplanet.com!uunet!in3.uu.net!129.91.131.22!news.encore.com!psoper
From: [e-mail] (Pete Soper)
Subject: switched stubs
Organization: Encore Computer Corporation
Date: Fri, 6 Dec 1996 16:14:53 GMT
Message-ID: <[e-mail]>
X-Nntp-Posting-Host: sysgem1.encore.com
Sender: [e-mail] (Usenet News)
Lines: 49

(When you get the caps-lock on with vi and type without looking at
the screen, bad things happen. Sorry for accidently posting the junk)

I'm exploring a three element wire yagi design that would switch a
stub in and out of each of the outer elements to exchange their roles
as director and reflector, to get good gain and F/B ratio in each of
two directions. The arrangement would be like this:


    element      switch     element
   ------------o<------o--------------
               |       |
               | stub  |
               |       |
               |       |


So my hope is that with the switch open the capacitive stub would
effectively shorten the elements and create a director while with the
switch closed I get a reflector.


I have three questions. The first is whether this is a valid approach,
or is it possible that the stub will influence the elements even when
the switch is closed? If I keep the "gap" represented by the switch
connections to each element very narrow will this minimize any influence?

I'm bothered by the fact that in order to model the above stub situation
with EZNEC this is done with the above "switch" in the closed position,
not open!

The second question is how to dress the power leads for the relay.
My preference would be to bring them straight down for a few feet and
then gently bend them toward the driven element feedline. I'm concerned
about coupling with the stub or general influence however. I wonder
if arranging for the stub to be held out at right angles would be
better? That is, have the stub come straight out of the screen as
you look a the above drawing.

Finally, I need to use the lightest possible relay that will do the
job. If I use EZNEC to model the current at the center of the element
I can get a feel for the current and potentials involved, but how do
I relate that to the DC parameters of the (cheapy) relays that my
budget requires using?


Regards,
Pete
KS4XG


From [e-mail] Wed Dec 11 19:38:44 1996
Newsgroups: rec.radio.amateur.antenna
Path: news1.epix.net!news3.epix.net!uunet!in3.uu.net!129.91.131.22!news.encore.com!psoper
From: [e-mail] (Pete Soper)
Subject: Switching stubs
Organization: Encore Computer Corporation
Date: Fri, 6 Dec 1996 16:00:41 GMT
Message-ID: <[e-mail]>
X-Nntp-Posting-Host: sysgem1.encore.com
Sender: [e-mail] (Usenet News)
Lines: 56

Hi,
        I'm exploring a wire 3 element yagi design that can
switch the outer two elements between director and reflector roles.
I'd like to do this by simply opening or closing a relay to put a
stub in or out of the circuit like this:


  ---------------------o<---o-------------------
                       |    |
                       |    |
                       |    |
                       |    |

        So if the arrow above is in the "open" position, the capacitive
stub is connected to the elements and should be the equivalent of
shortening them. So for this case "closed" would be arranged to give me
a reflector, while "open" would create a director.

[e-mail] (John Kaufmann) writes:

>[e-mail] (Paul Erickson) wrote:
>>Hi Everyone,
>>
>>In the next year I may be in a position to put up a tower (70ft)
>>and I have a 4 element quad (30ft boom) in storage. For 40mtrs I'm
>>wondering if I should replace the outer spreaders to accomodate a 2 el
>>quad, or if I should be looking for a 2el yagi?
>>
>>One of the advantages of modifing the quad is that I will then be able
>>to change it to include the warc bands, including 30mtrs.
>>
>>Any suggestions would be appreciated.
>>
>>cheers, Paul
>>VE7CQK
>>email: [e-mail]
>>


>A properly tuned 2 element quad will provide more gain and better F/B than
>a 2 element  yagi, provided you can get it up at a reasonable height (more
>than half a wavelength).  Some years ago, I put up a fixed pointed 2 element
>40 meter quad hung from a boom on top of a 120 foot tower.  I made it
>electrically switchable so the pattern could be flipped between forward and
>reverse directions.  The results were phenomenal.

>A well constructed yagi, on the other hand, will probably be mechanically
>stronger and more likely to  hold up in bad weather (I'm assuming you will
>be using spreader construction for the quad).  Here in W1, ice loading in
>the winter canl destroy a big quad--I've seen it happen to one 40 meter
>quad using fiberglass spreaders and it was quite a mess.

>GL & 73, W1FV

>John Kaufmann
>[e-mail]


From [e-mail] Wed Dec 11 19:38:44 1996
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From: [e-mail] (Paul J. Piercey)
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.digital.misc,rec.radio.amateur.dx,rec.radio.amateur.space,sci.astro,sci.astro.amateur
Subject: Test - Do not read
Date: Tue, 10 Dec 96 12:11:00 GMT
Organization: HookUp Communication Corporation, St. John's, Newfoundland, CANADA
Lines: 1
Message-ID: <58jjt6$p43$[e-mail]>
NNTP-Posting-Host: gnat.thezone.net
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Test.


From [e-mail] Wed Dec 11 19:38:45 1996
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From: <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: testing
Date: 7 Dec 1996 00:22:08 GMT
Organization: ken cubilo electric
Lines: 3
Message-ID: <01bbe3d5$346516c0$[e-mail]>
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sorry to waste the bandwidth but have not gotten a
posting from this group in over 3 weeks
73's ken


From [e-mail] Wed Dec 11 19:38:46 1996
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From: [e-mail] (Wb2chw)
Newsgroups: rec.radio.amateur.antenna
Subject: TOWERS,  towers  for  SALE
Date: 11 Dec 1996 15:09:40 GMT
Organization: AOL http://www.aol.com
Lines: 18
Message-ID: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]


FOR SALE BY K2UU:
Tubular towers:
US Tower MA550 (55'), rotor base, all accessories, e/c $1295.
Tri Ex TM 358 (58') sky needle, new S.S. cables, e/c $1995.
Tri Ex TM5100R (100') h.d. sky needle, all accessories. including rotator,
work platform, ladder, 30' mast (rotating), e/c $14,995.
Triangular towers:
Rohn #25, 60', w/tilt base, torque bars, guying hardware, e/c $500.
Tri Ex T26 SUPER TOWER 120', 20' sections rated at 50 sq. ft @ 80mph, e/c
$3500. Also have available for T26 rotating base w/ Telrex rotor, e/c
$2500.
RB25 insulated base section for com. vertical, e/c $350.
Delivery and installation of any tower can be arranged.
K2UU, Woody
Pse contact me via this e-mail address: [e-mail]




From [e-mail] Wed Dec 11 19:38:47 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!news.kei.com!newsfeed.internetmci.com!news.sprintlink.net!news-peer.sprintlink.net!panix!news.columbia.edu!sol.ctr.columbia.edu!news.oberlin.edu!alpha.cc.oberlin.edu!PRUTH
From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Turnstile antenna advice requested
Date: 2 Dec 1996 20:26:04 GMT
Organization: Oberlin College, Oberlin, Ohio
Lines: 9
Message-ID: <57ve0t$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: alpha.cc.oberlin.edu

I'm thinking of building a turnstile antenna for use as a 6 meter
omni antenna.  The only place I've seen this type of antenna mentioned
is in the ARRL Antenna Book, and they had a 2m version with a
reflector screen underneath for Oscar reception.  Since so many
beacons use turnstiles I am curious if this is a useful design
for a modest 6m station for both transmitting and receiving.  Does
anyone have any information regarding turnstile performance,
radiation pattern, etc.?  Thank you very much.  --Bill KB8USZ
[e-mail]


From [e-mail] Wed Dec 11 19:38:48 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Two Dipoles, One Center Insulator
Date: 6 Dec 1996 07:41:56 GMT
Organization: DigiPhone Corporation, Bryan/College Station Texas 409-693-8885
Lines: 58
Message-ID: <588io4$[e-mail]>
References: <58854p$[e-mail]>
Reply-To: [e-mail]
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In <58854p$[e-mail]>, [e-mail] writes:
>I put two dipoles (80 and 40) on the same center insulator and it seems to wo
rk fine; very low SWR on both bands. I also put
>two dipoles (20 and 10) on another center insulator; 20 loads fine with low S
WR. However. 10 will not load. With just a little bit of
>power the meter pegs. I suspects the 1o meter dipole looks like a short to th
e transmitter.
>
>Anything real obvious I am missing here?
>
>Thanks,
>
>
>
>[e-mail]
>*******************************************
>John E. Mansfield         Only you can make
>1032 Montgomery Avenue    it a great day!
>Pennsburg, PA 18073
>                          Semper Fidelis
>KB3PC
>
>To err is human,
>to forgive is divine,
>neither of which is USMC policy!

Ask any woman.   How coy you appear is related to how you peak out from
behind the paddle fan you happen to have when you peer out from behind it!

Similarly, how well a multiple dipole common fed system works, is related
to how far apart the two dipoles are fanned apart from the common central
feed point!

Further, there IS interaction between the dipoles, as I understand this!
The shorter antenna is much more affected by the longer one than the longer
one is by the shorter one!

You may find that you have to adjust the length of the shorter one quite a
bit off from what you first thought, because of the effects of the longer one!

Further, you didn't tell us what type of feed line you were using on this
double dipole with a common insulator in the middle!

I'm SURE that a ton of us are just waiting to jump in here and offer ALL
kinds of explanations on how this might happen, once we find out this or
that about what kind of feed line is involved.....

    :)

Without having to defend the fort from all the arrows here, common lengths
of feed line for 80 and 40 meter antennae are a relatively shorter part of
a wavelength for the 80/40 pair, than you will likely have on the 20/10
pair.  Depending on what is involved on the feed line, if a mismatch is
there, as I understand it, the feedline can only make it worse!


//-----------------------------
Mike - W5WQN
[e-mail]
[e-mail]



From [e-mail] Wed Dec 11 19:38:49 1996
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From: [e-mail] ( Nick J Chairchiaro, AET/N2QXF)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Two Dipoles, One Center Insulator
Date: Sat, 07 Dec 1996 03:07:33 GMT
Organization: Warwick Online
Lines: 54
Message-ID: <[e-mail]>
References: <58854p$[e-mail]>
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On 6 Dec 1996 03:49:45 GMT, [e-mail] wrote:
>I put two dipoles (80 and 40) on the same center insulator and it seems to wo
rk fine; very low SWR on both bands. I also put
>two dipoles (20 and 10) on another center insulator; 20 loads fine with low S
WR. However. 10 will not load. With just a little bit of
>power the meter pegs. I suspects the 1o meter dipole looks like a short to th
e transmitter.
>
>Anything real obvious I am missing here?
>
>Thanks,
>
>
>
>[e-mail]
>*******************************************
>John E. Mansfield         Only you can make
>1032 Montgomery Avenue    it a great day!
>Pennsburg, PA 18073
>                          Semper Fidelis
>KB3PC
>
>To err is human,
>to forgive is divine,
>neither of which is USMC policy!
>>

Hi John,

Firstly,  what length did you cut the 10m dipole?

I have a full set of dipoles at 30' on one center insulator for
80-40-20-15(multiple of 40), -10m  and they load fine.

Remember this when cutting a Paralell dipole system cut the longest
lengths first.  The shorter dipole won't effect the longer ones but
the longer ones will effect the shorter.

The shorter dipole WILL have to be cut longer than the standard
half/wave calculation.

To take it a step further I applied this principle to a set of
Hamstick verticals one on 40m and one on 10m.

At the back of the rig I used a T splitter and ran the coaxs to each
antenna.  The 10m hamstick had to be cut longer than the standard
cutting chart.  however,  They BOTH load up great and I get great
reports out to abt 600miles on 40m.

Hope this helps,

73
nick
n2qxf
[e-mail]
>



From [e-mail] Wed Dec 11 19:38:50 1996
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From: [e-mail] (Patrick A. Thompson)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Two Dipoles, One Center Insulator
Date: Tue, 10 Dec 96 23:06:30 GMT
Organization: MindSpring Enterprises
Lines: 34
Message-ID: <58kqer$[e-mail]>
References: <58854p$[e-mail]>
NNTP-Posting-Host: ip191.knoxville2.tn.interramp.com
X-Server-Date: 10 Dec 1996 23:07:07 GMT
X-Newsreader: News Xpress 2.0 Beta #2

I've used this style of antenna for years with no particular problem.
I've also read over some of the replies and they have good
suggestions. But if the SWR is just out-the-top, is it possible that
you have a bad connection at the dipole center?

WA4TUK

In article <58854p$[e-mail]>, [e-mail] wrote:
>I put two dipoles (80 and 40) on the same center insulator and it seems to wo
rk
> fine; very low SWR on both bands. I also put
>two dipoles (20 and 10) on another center insulator; 20 loads fine with low
> SWR. However. 10 will not load. With just a little bit of
>power the meter pegs. I suspects the 1o meter dipole looks like a short to th
e
> transmitter.
>
>Anything real obvious I am missing here?
>
>Thanks,
>
>
>
>[e-mail]
>*******************************************
>John E. Mansfield         Only you can make
>1032 Montgomery Avenue    it a great day!
>Pennsburg, PA 18073
>                          Semper Fidelis
>KB3PC
>
>To err is human,
>to forgive is divine,
>neither of which is USMC policy!
>
>


From [e-mail] Wed Dec 11 19:38:51 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.net!www.nntp.primenet.com!nntp.primenet.com!news.sgi.com!news.msfc.nasa.gov!in1.nntp.cais.net!van-bc!n1van.istar!van.istar!west.istar!news-w.ans.net!newsfeeds.ans.net!news.lava.net!news.Hawaii.Edu!jherman
From: [e-mail] (Jeffrey Herman)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Two Dipoles, One Center Insulator
Date: 11 Dec 1996 04:51:14 GMT
Organization: University of Hawaii
Lines: 18
Message-ID: <58lek2$[e-mail]>
References: <58854p$[e-mail]> <58kqer$[e-mail]>
NNTP-Posting-Host: uhunix3.its.hawaii.edu

My 60s edition of the ARRL Antenna Manual shows a diagram of *5* dipoles
sharing a single center insulator! They're all in the vertical plane. They
recommend trimming first the 80m dipole, then the 40m, 20m, 15m, and
lastly, the 10m. A not-so-accurate drawing showing 3 co-planar dipoles:

       \    /
        \  /
_________\/________
         /\
        /  \
       /    \
      /      \

Don't get the impression these are of an inverted V shape. The angles
aren't as extreme as drawn.

73 from Hawaii,
Jeff KH2PZ


From [e-mail] Wed Dec 11 19:38:52 1996
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From: [e-mail] (chris hoffmann)
Newsgroups: rec.radio.amateur.antenna
Subject: UHF QUAD antenna ?? please
Date: Tue, 03 Dec 1996 01:25:56 GMT
Organization: Great Basin Internet Services, Reno, NV
Lines: 6
Distribution: world
Message-ID: <[e-mail]>
NNTP-Posting-Host: hoffmannchrisj.reno.nv.us
X-Newsreader: Forte Free Agent 1.1/16.230

does any body have plans for a 440.000 mhz quad ??? please if you do,
i need the element lengths and spacing.. looking for at least 4-7
elements and i'm strapped for cash ..
thank you    please e-mail info to
[e-mail]
  chris


From [e-mail] Wed Dec 11 19:38:53 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: UHF slot antenna
Date: 5 Dec 1996 04:03:29 GMT
Organization: AOL http://www.aol.com
Lines: 11
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

Hello, Bill.
Saw your posting concerning slot antennas. I'm interested in designing a
slot antenna for 2 Ghz.--Would you have any design info. or could you
point me in the right direction? We're hoping to use the antenna as a
backup receive unit for ENG (electronic news gathering) work at a local TV
station.

Many thanks,

Jim Stanley
KA5HUB


From [e-mail] Wed Dec 11 19:38:54 1996
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From: [e-mail] (Edward J. Zeranski)
Newsgroups: rec.radio.amateur.antenna
Subject: Vee Beam
Date: Thu, 05 Dec 1996 04:49:50 GMT
Organization: self
Lines: 13
Message-ID: <585kop$[e-mail]>
NNTP-Posting-Host: crc7.cris.com
X-Newsreader: Forte Free Agent v0.46



        Now have  the room for a 75m VEE array, looks like 3 inverted V's in
series.  Director, Driven, and reflector. Anyone played with one???
Thanks.










From [e-mail] Wed Dec 11 19:38:55 1996
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From: [e-mail] (Mike Del Pozzo)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Vee Beam
Date: Thu, 05 Dec 1996 09:11:20 GMT
Organization: MindSpring Enterprises
Lines: 24
Message-ID: <585p1p$[e-mail]>
References: <585kop$[e-mail]>
NNTP-Posting-Host: user-168-121-62-141.dialup.mindspring.com
X-Server-Date: 5 Dec 1996 06:11:05 GMT
X-Newsreader: Forte Free Agent 1.0.82

[e-mail] (Edward J. Zeranski) wrote:



>       Now have  the room for a 75m VEE array, looks like 3 inverted V's in
>series.  Director, Driven, and reflector. Anyone played with one???
>Thanks.

Yup - Built one on 40 mtr
and it kicks @#$% big time.
it needs to be at least 1/3 wave up though , but
it sure is a quiet one. I have a 2 el for 80 but not
quite high enough @ 60 ft.
Gud Luck de
Mike , KR4TG











From [e-mail] Wed Dec 11 19:38:55 1996
Path: news1.epix.net!news3.epix.net!uunet!in1.uu.net!198.82.160.249!solaris.cc.vt.edu!news.seanet.com!news
From: [e-mail] (Richard W. Clark)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: vertical base insulators
Date: Thu, 05 Dec 1996 20:59:23 GMT
Organization: Seanet Online Services, Seattle WA
Lines: 13
Message-ID: <587dgr$[e-mail]>
References: <[e-mail]> <584hlg$[e-mail]>
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X-Newsreader: Forte Free Agent 1.0.82

[e-mail] wrote:

>Malcome Forbes spent most all his life dreaming about a girl in white he
>saw standing on the dock as the Manhatten Ferry pulled away from it and
>he never saw her again.

I'll trust your judgement about non-insulated verticals (not much to
dispute there) but the observation above is actually from the movie
"Citizen Kane" and has little to do with Mr. Forbes (except in the
abstract).

Richard Clark, KB7QHC



From [e-mail] Wed Dec 11 19:38:56 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: WANTED Tower Base for Rohn 55
Date: 4 Dec 1996 00:58:48 GMT
Organization: AOL http://www.aol.com
Lines: 5
Message-ID: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

WTB BPC55G, flat base plate with stubs for Rohn 55 tower?

Reply to:

[e-mail]


From [e-mail] Wed Dec 11 19:38:57 1996
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From: [e-mail] (Hank Kahrs)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Which 5-band antenna?
Date: Mon, 02 Dec 1996 19:08:49 GMT
Organization: CMDS News machine
Lines: 35
Message-ID: <57v9f7$[e-mail]>
References: <[e-mail]> <[e-mail]> <57keeo$[e-mail]>
NNTP-Posting-Host: 204.49.40.129
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William J Heinzinger <[e-mail]> wrote:

>In article <[e-mail]>,
>       [e-mail] wrote:

>>On 11/18/96 9:18PM, in message <[e-mail]
m>,
>>[e-mail] wrote:
>>
>>> My father-in-law just lost his Telrex tri-bander to an ice storm here in
>>> Minnesota last weekend.  He's looking for a 5 band antenna to replace it.
>>> Any recommendations?  I don't think he's interested in a quad.
>>>
>>> Thanks for your input.
>>> Mark,  N0YRW
>>Why not give the GAP vertical a try ? You can ground mount it, and put off t
he tower
>>ressurection until spring. These are pretty good antennas.
>>

> If your father-in-law lost a tribander in an ice storm and ice storms are fr
equent than do NOT
>consider a quad.
>I had one for many years and they work great but are a bear to keep together.
>Ice is hell on the wires.
>Bill

Bill,
I used a Mosley PRO 57B and upgraded it to a PRO67B...present ant.  I
survived Hurricanes OPAL and ERIN about 20 miles away from a direct
hit.  They are well built!


73, Hank/K2UVG
[e-mail]
http://www.nfds.net/~nkahrs/k2uvg.html




From [e-mail] Wed Dec 11 19:38:58 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!news.kei.com!newsfeed.internetmci.com!in3.uu.net!152.163.170.17!newstf01.news.aol.com!audrey01.news.aol.com!not-for-mail
From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Windoms
Date: 2 Dec 1996 09:20:53 GMT
Organization: AOL http://www.aol.com
Lines: 23
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

First off: my original crude drawing of the end fed zepp got its margins
screwed up by AOL.

--oOOo-o000--------------------------oOOo-----
  |        |
  |        |
  |        |
                    (I hope this version makes it OK)

Secondly...
> I heard the announcer who witnessed the disaster when I
>went to a corner drug store to make a phone call and they >had a radio on
with the news program in progress.
>Charlie, W7XC

I've heard the recordings of radio coverage of the Hindenberg disaster ---
it's sorta like my neighborhood whenever I transmit ("Oh! The
humanity!!!")

Anyhow, I think transmitting from a Zepplin would be very cool, no matter
what the antenna!

jt (who hates RF in the shack --ouch!)


From [e-mail] Wed Dec 11 19:38:59 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!fpmbh.com!iag.net!news.magicnet.net!feed1.news.erols.com!howland.erols.net!swrinde!cs.utexas.edu!ennfs.eas.asu.edu!news.asu.edu!aztec.asu.edu!hamop
From: [e-mail] (CHARLES J. MICHAELS)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Windoms
Date: 3 Dec 1996 04:28:39 GMT
Organization: Arizona State University
Lines: 16
Message-ID: <580a9n$[e-mail]>
NNTP-Posting-Host: aztec.asu.edu


JT said -
First off: my original crude drawing of the end fed zepp got its margins
screwed up by AOL.

--oOOo-o000--------------------------oOOo-----
  |        |
  |        |
  |        |
                    (I hope this version makes it OK)

JT,
        Nope, left feeder still in wrong place .  belongs at the
junction of the two left insulators.
Charlie, W7XC
--


From [e-mail] Wed Dec 11 19:39:00 1996
Path: news1.epix.net!news3.epix.net!uunet!in2.uu.net!152.163.170.17!newstf01.news.aol.com!audrey01.news.aol.com!not-for-mail
From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Windoms
Date: 3 Dec 1996 19:47:03 GMT
Organization: AOL http://www.aol.com
Lines: 5
Message-ID: <[e-mail]>
References: <580a9n$[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

Yah, the margins are still making me look like an idiot who can't figure
out that at least one side of an antenna needs to be connected to a
feedline. I give up trying to draw diagrams in newsgroup files! (sigh)

-jt


From [e-mail] Wed Dec 11 19:39:01 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: WTB: HF Vertical Antenna
Date: Mon, 02 Dec 1996 21:07:06 GMT
Organization: M.A.G. Information Services (MAGG.NET)
Lines: 6
Message-ID: <57vv45$[e-mail]>
NNTP-Posting-Host: wpb-185.magg.net
X-Newsreader: Forte Free Agent 1.0.82


I'm looking for a good HF Vertical Antenna, something in the order of
a Cushcraft R5 or R7000. Must be in good condition and include the
paperwork.
Thanks, Doug     KD4HRT    [e-mail]



From [e-mail] Wed Dec 11 19:39:01 1996
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From: Stacy Hamby <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: WTB: Hustler 75meter resonator
Date: Tue, 10 Dec 1996 20:29:22 -0600
Organization: HiLine Internet Customer
Lines: 9
Message-ID: <[e-mail]>
NNTP-Posting-Host: shamby.hiline.net
Mime-Version: 1.0
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X-Mailer: Mozilla 3.0Gold (Win95; I)

WTB 75 metter resonator for 4-BTV vertical.

Please respond via e-mail.

Thanks
Stacy, KC6PRR
[e-mail]




From [e-mail] Wed Dec 11 19:39:02 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!feed1.news.erols.com!worldnet.att.net!uunet!in3.uu.net!206.65.248.4!dialnet!news
From: "Kelly Ellison" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: WTB: TH3JR
Date: 9 Dec 1996 21:37:50 GMT
Organization: DialNet USENET News Service.
Lines: 8
Message-ID: <01bbe64b$bc9f1ae0$84f941ce@kelman>
NNTP-Posting-Host: dsar2.dialnet.net
Mime-Version: 1.0
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Looking for Th3JR Tri-band beam or similar.  Must be willing to ship
(obviously).
Please Email me direct with info.

Kelly Ellison - WB0WQS
[e-mail]




From [e-mail] Wed Dec 11 19:39:03 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!news.sprintlink.net!news-pull.sprintlink.net!news.sprintlink.net!news-peer.sprintlink.net!howland.erols.net!news-e2a.gnn.com!pop.gnn.com!N6TT
From: [e-mail] ()
Newsgroups: rec.radio.amateur.antenna
Subject: WTB:US TOWER HDX589
Date: Wed, 11 Dec 1996 09:37:20
Organization: GNN
Lines: 4
Message-ID: <58mrll$[e-mail]>
NNTP-Posting-Host: 28-234.client.gnn.com
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
X-GNN-NewsServer-Posting-Date: 11 Dec 1996 17:40:05 GMT
X-Mailer: GNNmessenger 1.3

   WANTED CRANK-UP TOWER..LIKE THE US HDX589,SKY NEEDLE,ETC.
   [e-mail] STEVE 310-3186990
                MANHATTAN BEACH,CA.



From [e-mail] Sat Dec 21 12:32:06 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!mindspring!uunet!in3.uu.net!206.250.118.17!nntp.earthlink.net!usenet
From: "Christopher (Chris) W. Boone" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: ### Antenna Construction
Date: Thu, 12 Dec 1996 23:05:28 -0800
Organization: ABC Radio Network Engineering - Dallas
Lines: 45
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: cust111.max10.dallas.tx.ms.uu.net
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 2.01 (Win16; U)

Edwin Teh, 9V1ZY wrote:
>
> I'm currently trying to homebrew a simple magmount antenna for my 2m
> HT, and have a couple of questions. Could someone here help me out?
>
> #1: The antenna would be a simple brass rod soldered to the centre
> connector of a PL259. It is about 19 3/4 inches. Would this be the
> correct length for a 1/4 wave antenna? (I used l=234/f, where
> f=145Mhz)

Correct for 1/4wave 2mtr antenna (actually 19 inches works ok)
>
> #2: It doesn't have a groundplane. Would this be a problem? What would
> it's radiation pattern be like?

If its a magnet mount, it still has a ground plane...it capacitively
couples to the ground plane it sticks to (a METAL ground plane)...


> #3: Would it be useful in any way at all to construct the magmount
> with a grounding strap touching the roof of the vehicle? I figured
> since the roof of my car is painted (like almost all vehicles I know
> of are...) - it won't be possible for the magmount to make an
> electrical connection and therefor, it'd be useless to try something
> like that. Am I wrong here? (The HT would be operated from nicads and
> not from the vehicles battery - would it make a difference if it did?)

Best way is to drill a hole and MOUNT the antenna permanently...but if
not, use of a mag mount is perfectly ok!
>
> #4: Am I wasting my time? Or should I just go out and purchase a
> magmount antenna? 8P

Depends on what your time to build it is and how much you can buy one
for...

>
> Would appericiate any responses. Emails prefered.
>
> Ed, 9V1ZY.
> --

73
Chris
WB5ITT


From [e-mail] Sat Dec 21 12:32:07 1996
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Newsgroups: rec.radio.amateur.antenna
Subject: Re: ### Antenna Construction
Message-ID: <[e-mail]>
From: [e-mail] (Randy Crowe)
Date: Fri, 13 Dec 1996 15:14:16 GMT
Sender: [e-mail]
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In article <[e-mail]>, [e-mail] (Edwin Teh,
 9V1ZY) wrote:
>I'm currently trying to homebrew a simple magmount antenna for my 2m
>HT, and have a couple of questions. Could someone here help me out?
>
>#1: The antenna would be a simple brass rod soldered to the centre
>connector of a PL259. It is about 19 3/4 inches. Would this be the
>correct length for a 1/4 wave antenna? (I used l=234/f, where
>f=145Mhz)
>
>#2: It doesn't have a groundplane. Would this be a problem? What would
>it's radiation pattern be like?
>
>#3: Would it be useful in any way at all to construct the magmount
>with a grounding strap touching the roof of the vehicle? I figured
>since the roof of my car is painted (like almost all vehicles I know
>of are...) - it won't be possible for the magmount to make an
>electrical connection and therefor, it'd be useless to try something
>like that. Am I wrong here? (The HT would be operated from nicads and
>not from the vehicles battery - would it make a difference if it did?)
>
>#4: Am I wasting my time? Or should I just go out and purchase a
>magmount antenna? 8P
>
>Would appericiate any responses. Emails prefered.
>
>Ed, 9V1ZY.

Ed;

    I have home brewed several mag mount 1/4 wave antennas from scraps and had

verry good success with this.  There has seemed to be enough capacitive
coupling between the car body and the antenna to keep the systems happy as far

as SWR goes.  I have ran both an HT from batteries and auto 12v power.  Also
ran an ICOM mobile at 25W with no problems.

The length mentiond above may be a little long however.  In most cases you
also need to calculate the velocity factor of the material used.  The formula
is for free space/ideal propagation which doesn't hold true for copper or
brass rods. (or any other material for that matter)  I've found that about
18.5 - 18.75 inches to be more like it.  Try it and see...you can always re
tune by trimming and try again

73's de Randy   N8OZY

[e-mail]


From [e-mail] Sat Dec 21 12:32:08 1996
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From: "David A. Cooley" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: ### Antenna Construction
Date: Sat, 14 Dec 1996 21:22:18 -0500
Organization: IPass.net
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Edwin Teh, 9V1ZY wrote:
>
> I'm currently trying to homebrew a simple magmount antenna for my 2m
> HT, and have a couple of questions. Could someone here help me out?
>
> #1: The antenna would be a simple brass rod soldered to the centre
> connector of a PL259. It is about 19 3/4 inches. Would this be the
> correct length for a 1/4 wave antenna? (I used l=234/f, where
> f=145Mhz)
>

That should be close... Leave an extra 1/4" to 3/8 of an inch... you can
remove material to lower SWR, but can't add.

> #2: It doesn't have a groundplane. Would this be a problem? What would
> it's radiation pattern be like?

If it's mounted to the car in the roof (preferred) or trunk (2nd best)
the car's metal acts as a ground plane.

>
> #3: Would it be useful in any way at all to construct the magmount
> with a grounding strap touching the roof of the vehicle? I figured
> since the roof of my car is painted (like almost all vehicles I know
> of are...) - it won't be possible for the magmount to make an
> electrical connection and therefor, it'd be useless to try something
> like that. Am I wrong here? (The HT would be operated from nicads and
> not from the vehicles battery - would it make a difference if it did?)

All you need is one ground wire from the chassis of the car to the HT's
ground... at the antenna connector or elsewhere.

>
> #4: Am I wasting my time? Or should I just go out and purchase a
> magmount antenna? 8P

Depends on why you are building it yourself... of it's to save money, or
to build it for the fun of doing it, then by all means do it...  However
for saving money, you can get a 5/8 wave mag mount from Radio shack for
roughly $25.00... A 5/8 wave has a better radiation pattern than a 1/4
wave.  It also has a built in matching network, as a 5/8 wave isn't 50
ohms.

Later,
Dave



--
========================================================================
David Cooley N5XMT                  Packet: N5XMT@W4RAL.#RTP.NC.USA.NOAM
Internet: [e-mail]    And Web: http://www.ipass.net/~cooldave/
Sponges grow in the ocean... Wonder how deep it would be if they didn't!
========================================================================


From [e-mail] Sat Dec 21 12:32:09 1996
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From: [e-mail] (K1BQT)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: ### Just curious
Date: 17 Dec 1996 23:35:02 GMT
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Hi Edwin--

I think a 2-meter 5/8-wave antenna set horizonatlly would become what--in
the HF world--is called an end-fed Zepp.  It would be horizontally
polarized--although it may not have the most productive pattern in the
world.  If you put two of them back-to-back, you would have what is called
an EDZ--or extended double Zepp (this is a 100-ohm antenna that requires
matching to 50-ohm line--but it has pretty good gain numbers).  In terms
of simplicity and practicallity, a horizontal 1/2-wave dipole might be
easier to implement, and it would work nearly as well. But, if your
immediate objective is to overcome that "instant 20-dB penalty" for cross
polarization, simply laying your mag-mount over on its side might be a
very practical solution.

Rick  K1BQT


From [e-mail] Sat Dec 21 12:32:10 1996
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From: "Garth (KA7MHN)" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: ### Just curious
Date: Wed, 18 Dec 1996 21:37:17 -0700
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To: "Edwin Teh, 9V1ZY" <[e-mail]>

Hi Edwin,
If you lay your 5/8 antenna on side it will become horizontally
polarized. The only problem with this is that most likely all the other
repeaters in your area are vertically polarized.  You would still likely
be able to communicate with or through them but not as effectively.  If
you are close at all you probably will not be able to communicate.  Alot
of people using hts have a tendancy to hold them at 45deg. or more and
find that when they get farther away from the rept. that they start
lossing it sooner than expected.  Have fun experimenting.  73 de Garth
KA7MHN...


From [e-mail] Sat Dec 21 12:32:11 1996
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From: [e-mail] (Fractenna)
Newsgroups: rec.radio.amateur.antenna
Subject: 'Megawave' Antennas?
Date: 19 Dec 1996 15:33:15 GMT
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Hi--

Just dug out something from the Web which talked about 'MegaWave Corp' and
a "revolutionary new antenna technology". Does anyone have any info on
this?

Thanks!

Chip N1IR


From [e-mail] Sat Dec 21 12:32:12 1996
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From: Rich <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: (no subject)
Date: 12 Dec 1996 10:26:08 GMT
Organization: Physical Chemistry Laboratory, South Parks Road, Oxford OX1 3QZ
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I am a Physical Chemist doing some experiments using radio frequency (20-40
MHz) in a tuned coil, and need to know the size of the magnetic field in my
coils. Is there an easy way to measure/calculate this?? I guess I could ask a
physicist but I thought you guys might be more helpful.

If you do know the answer could you email me as I don't check the newsgroups
that ofte. Either of the addresses below is OK.

Thanks a lot for your time,

Richard Jackson
--
Physical & Theoretical       | Tel: (UK) 01865 275417
       Chemistry Department  | Fax: (UK) 01865 275410
South Parks Road             | E-Mail:- [e-mail]
Oxford   OX1 3QZ             | &  [e-mail]
ENGLAND



From [e-mail] Sat Dec 21 12:32:13 1996
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From: [e-mail] (Teijo Murtovaara)
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Date: 18 Dec 96 10:07:21 GMT
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not subscribe



From [e-mail] Sat Dec 21 12:32:13 1996
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From: [e-mail] (WB4LNM)
Newsgroups: rec.radio.amateur.antenna
Subject: ** Transmitting Loop on Mobile: Why not? **
Date: 15 Dec 1996 16:19:34 GMT
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I am considering a transmitting loop antenna on my car, instead of the
conventional whip.  Seems like there are several advantages.  Has anyone
had experience trying these while mobile?  What are the upside and
downside?  Comments appreciated.  Thanks.

John... WB4LNM


From [e-mail] Sat Dec 21 12:32:15 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: ** Transmitting Loop on Mobile: Why not? **
Date: 16 Dec 1996 03:29:01 GMT
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In article <[e-mail]>, [e-mail]
(WB4LNM) writes:

>
>I am considering a transmitting loop antenna on my car, instead of the
>conventional whip.  Seems like there are several advantages.  Has anyone
>had experience trying these while mobile?  What are the upside and
>downside?  Comments appreciated.  Thanks.
>
>John... WB4LNM

Hi John,

Since we have such a nice "groundplane" available in the car, a loop might
not make much sense for HF use.

A vertical antenna of the similar dimension to the loop would be easier to
make efficient and have less wind loading. Plus the verticals radiation
pattern is more favorable for mobile operation.

The only fitting loop application I can think of is on a car like a
Corvette, or if you want to change bands while driving. In that case, a
loop might have some advantage. But then, I'm not sure a two inch thick
loop of pipe with a big capaciator for tuning would enhance the looks of a
chev-Vette, hi.

73 Tom
73 Tom


From [e-mail] Sat Dec 21 12:32:17 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: ** Transmitting Loop on Mobile: Why not? **
Date: 17 Dec 1996 01:57:55 GMT
Organization: AOL http://www.aol.com
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 (WB4LNM) writes:

>I am considering a transmitting loop antenna on my car, instead of the
>conventional whip.  Seems like there are several advantages.  Has anyone
>had experience trying these while mobile?  What are the upside and
>downside?  Comments appreciated.  Thanks.
>
>John... WB4LNM

   You didn't specify what type of vehicle you are putting this loop
antenna on but I will assume you are refering to a regular automobile.  I
have seen several tuned loop or "halo" antennas used in the vhf bands on
automobiles and they are nice in that they provide a nice 360 degree
radiation pattern that is horizontally polarized.  This is nice for 2m and
6m ssb work
    The downside to them is that they are sensitive to the magnetic field
produced by the vehicle body.  At least I think that is the trouble.  I
made up a tuned loop antenna that worked fine while hung in the shop but
couldn't be tuned for swr or impedance when I mounted it to the top of my
freightliner truck.  I have seen some people who had success with larger
tuned loops constructed out of 1/2" copper pipe and mounted to the top of
an rv.  They used a variable capacitor to tune the loop for resonance on
several hf bands.  The nov 95 QST has an artical on a small 3' diaeter
octagonal tuned loop that I used for a starting point for my tuned loop.
Good Luck and 73   Paul KC7OFM



From [e-mail] Sat Dec 21 12:32:18 1996
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From: [e-mail] (Dudley Chapman)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: ** Transmitting Loop on Mobile: Why not? **
Date: Tue, 17 Dec 1996 03:02:59 GMT
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[e-mail] (WB4LNM) wrote:

>I am considering a transmitting loop antenna on my car, instead of the
>conventional whip.  Seems like there are several advantages.  Has anyone
>had experience trying these while mobile?  What are the upside and
>downside?  Comments appreciated.  Thanks.

>John... WB4LNM


John,
    The small transmitting loop has extremely high currents in it.
This causes it to couple very strongly to any nearby conductors.  The
induced currents in the metal of the car will be very high because of
this.  If you put much power into it, you will peel the paint.   A
typical well designed mobile vertical for 40m has a 15 ohm feedpoint
impedance.  A short transmmitting loop, on the other hand, has a
feedpoint impedance that is much less than an ohm.
Since P = (I^2) * R, you can see my point.  Imagine what the current
is when P = 100W and R is 0.01 ohms.
     At first, it seems like a great idea and you wonder why everyone
doesn't run a loop for mobile.  This is the reason.

Dudley, WA1X




From [e-mail] Sat Dec 21 12:32:22 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: ** Transmitting Loop on Mobile: Why not? **
Date: Wed, 18 Dec 1996 15:10:11 GMT
Organization: NetWizards, Inc.
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Dudley has a point. I'd be concerned with the induced RF into the
car's electronic igniton control system...
It could be a very expensive experiment - The CPUs cost $10's to 1000+
still - tell me how it works if you try it.

Noland WB6CKT

[e-mail] (Dudley Chapman) wrote:

>[e-mail] (WB4LNM) wrote:

>>I am considering a transmitting loop antenna on my car, instead of the
>>conventional whip.  Seems like there are several advantages.  Has anyone
>>had experience trying these while mobile?  What are the upside and
>>downside?  Comments appreciated.  Thanks.

>>John... WB4LNM


>John,
>    The small transmitting loop has extremely high currents in it.
>This causes it to couple very strongly to any nearby conductors.  The
>induced currents in the metal of the car will be very high because of
>this.  If you put much power into it, you will peel the paint.   A
>typical well designed mobile vertical for 40m has a 15 ohm feedpoint
>impedance.  A short transmmitting loop, on the other hand, has a
>feedpoint impedance that is much less than an ohm.
>Since P = (I^2) * R, you can see my point.  Imagine what the current
>is when P = 100W and R is 0.01 ohms.
>     At first, it seems like a great idea and you wonder why everyone
>doesn't run a loop for mobile.  This is the reason.

>Dudley, WA1X






From [e-mail] Sat Dec 21 12:32:23 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: ** Transmitting Loop on Mobile: Why not? **
Date: 20 Dec 1996 13:53:08 GMT
Organization: AOL http://www.aol.com
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In article <[e-mail]>, Hank Blackstock <[e-mail]>
writes:

>
>Some antennas shown in early ARRL mobile handbooks (early 1950's) were
>loops that used the car body as part of the loop. For example a very
>long whip mounted on the rear that was bent over and the end of it
>attached to the front of the car.  I have considered trying the idea
>using large copper tubing as three sides of the loop and the car as the
>fourth side, but never got around to trying it.
>
>Hank WA5JRH

Hi Hank,

Of course ALL antennas are sensitive to BOTH magnetic and electric fields.
If they weren't, the couldn't be used as antennas!

But I can't understand why someone would want to:

1.) Create higher circulating currents that increase I^2 R losses.

2.) Radiate signal that used to go out on at useful angles straight up.

The best antenna seems to clearly be a top or center loaded vertical.

If the car body is made part of the loop path, I'd expect all types of
electrical damage and noise problems. The current in a small loop is much
higher than in a vertical of the same dimension, and flows through the
chassis of the vehicle. That's a very bad thing.
73 Tom


From [e-mail] Sat Dec 21 12:32:24 1996
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From: Hank Blackstock <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: ** Transmitting Loop on Mobile: Why not? **
Date: Fri, 20 Dec 1996 21:26:49 -0600
Organization: Internet Oklahoma
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[e-mail] wrote:
>

> 1.) Create higher circulating currents that increase I^2 R losses.
>

I understand this, however I like to try diferent things just to see
what the results are. Expermintation is what I think Ham radio is about.

> 2.) Radiate signal that used to go out on at useful angles straight up.
>

Low angles of radiation are not always desired. i.e good solid coverage
for 2 or 3 hundred miles can be achived on 75 meters with high angles.
An antenna called the nvis (I think that is the name) is used for this
purpose.

73 Hank W5HJ


From [e-mail] Sat Dec 21 12:32:25 1996
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From: [e-mail] (Bob Bruhns)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: ** Transmitting Loop on Mobile: Why not? **
Date: 21 Dec 1996 04:00:40 GMT
Organization: LI Net (Long Island Network)
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WB4LNM ([e-mail]) wrote:
: I am considering a transmitting loop antenna on my car, instead of
: the conventional whip.  Seems like there are several advantages.
: Has anyone had experience trying these while mobile?  What are the
: upside and downside?  Comments appreciated.  Thanks.

  A vertical antenna tends to beam at low radiation angles.  This is
OK for DX, but not so good for high-angle local work, even on bands
which would otherwise support it.

  Certainly, on 75 meters the radiation angle of a mobile whip is too
low for local contacts.  You're relatively weak at a distance, and
very weak closer in because of the "cone of silence" above the
vertical.  Ground wave on 75 is pretty much washed out after only
a couple of miles, except over salt water, so it's not any help except
for very nearby mobiles.  160 meter groundwave is almost as bad, and
40 meter groundwave is even worse.

  Of course, if you really did a good job and you also run some power,
your skywave may not be too terribly weak at the distance.  I
sometimes hear surprisingly strong mobiles from 500 to 1000 miles out
on 75 at night.  But 75 meter absorption loss during the day limits
range to only a few hundred miles.

  A small loop tends to radiate in the plane of the loop.  So, if the
loop is vertical, you should get significantly better high-angle
radiation than you would with a vertical.  But keep in mind that at
this low ebb of the sunspot cycle, high angle radiation won't do much
for you at night except maybe on 160 meters.  Still, you should see a
big difference during daylight operation.  With a good vertical loop,
75 and 40 should usually be good for local work from 10 feet out to
a few hundred miles during the day.

  I used vertical loops from a small yard on 75 and 160, with good
results.  I think they ought to work well mobile too.  One fellow
with a convertible took his rear-bumper-mounted whip and pulled it
over and grounded it to the metal above the top of the windshield, and
reported good results.  I saw an article on this subject in a 1951
issue of QST, I think.  Anyone with a sunroof ought to be able
to do something similar.  Or, if the whip is long enough it should be
possible to pull it over and ground it to the front fender or the front
bumper.  Just leave some good open loop area above the car.  Maybe two
whips, one on the front bumper and one on the rear, tied together above
the roof, fed at one end and grounded at the other...  Just stainless
steel whips, a clamp, and a good tuner...


  Bob Bruhns, WA3WDR, [e-mail]



From [e-mail] Sat Dec 21 12:32:28 1996
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From: "Roger D. Placer" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: 1/2-wave 'Quad'?
Date: Tue, 17 Dec 1996 15:46:22 -0500
Organization: Lucent Technologies - Bell Labs
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I have a question for those "resonant experts" (sorry) in the group.
Regarding parasitic arrays - the yagi is essentially based on the
1/2-wave dipole, while the quad is based on the fullwave loop. The delta
version of same is a fullwave loop with three sides. That said...

I'm thinking about experimenting with some designs which allow for a
total element length of a half-wavelength, like the yagi, but which
incorporate the loop design of the quad. My goal here is some sort of
gain and directional ability, while not requiring the huge aerial
footprint of either one of these antennas. I'm shooting for the 20/17/15
meter bands.

For example, what would happen if you measured according to the yagi
spec, but instead folded the elements of the beam into loops that
remained open? In other words, each side (4) of the driven element would
be 1/8l long and the element would be open on the top (or side, bottom,
subject to experimentation).

Does anyone have any thoughts on the viability of this sort of antenna?

==========================================================
Roger D. Placer, KA2Z      Lucent Technologies - Bell Labs
Phone(W) 908.582.3112    Business:       [e-mail]
FAX(W)   908.582.3662    Personal: [e-mail]
==========================================================


From [e-mail] Sat Dec 21 12:32:30 1996
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From: [e-mail] (A.G. von Luternow)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 1/2-wave 'Quad'?
Date: Thu, 19 Dec 1996 23:27:59 GMT
Organization: -
Lines: 55
Message-ID: <[e-mail]>
References: <[e-mail]>
Reply-To: [e-mail]
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On Tue, 17 Dec 1996 15:46:22 -0500, "Roger D. Placer"
<[e-mail]> wrote:

>I have a question for those "resonant experts" (sorry) in the group.
>Regarding parasitic arrays - the yagi is essentially based on the
>1/2-wave dipole, while the quad is based on the fullwave loop. The delta
>version of same is a fullwave loop with three sides. That said...
>
>I'm thinking about experimenting with some designs which allow for a
>total element length of a half-wavelength, like the yagi, but which
>incorporate the loop design of the quad. My goal here is some sort of
>gain and directional ability, while not requiring the huge aerial
>footprint of either one of these antennas. I'm shooting for the 20/17/15
>meter bands.
>
>For example, what would happen if you measured according to the yagi
>spec, but instead folded the elements of the beam into loops that
>remained open? In other words, each side (4) of the driven element would
>be 1/8l long and the element would be open on the top (or side, bottom,
>subject to experimentation).
>
>Does anyone have any thoughts on the viability of this sort of antenna?
>
>==========================================================
>Roger D. Placer, KA2Z      Lucent Technologies - Bell Labs
>Phone(W) 908.582.3112    Business:       [e-mail]
>FAX(W)   908.582.3662    Personal: [e-mail]
>==========================================================

Hi Roger

You might want to consider something like a VK-parasol, a two element
wire beam. The frame work is a X shaped pattern with a vertical post
in the center. The elements are longer than the end of the frame and
are bent upwards and toward the center of the X where they are
anchored.

I have built several of these over the years (including a tri-bander)
using PVC tubing for the frame. This type of antenna is very
light-weight, inexpensive and extremely easy to build. With my
tri-bander (20-15-10) I experienced no interaction between elements.
The feed is done in series and no matching network is required.

There were articles concerning this antenna in both 73 and QST in
October 1983 (the month is right but the year might be 1984). The
article in 73 was the better of the two as it gave the formulas for
determining the size of the frame and the length of the elements.

73 de n4jvp
Fritz

cc:<[e-mail]>
To reply to this message, please remove the
underscore from the beginning of the reply to
address. I'm trying to fight the spam-bots!


From [e-mail] Sat Dec 21 12:32:31 1996
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From: [e-mail] (Jan PA0LBN)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 1/2-wave 'Quad'?
Date: Thu, 19 Dec 1996 21:52:48
Organization: none
Lines: 37
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References: <[e-mail]>
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In article <[e-mail]> "Roger D. Placer" <[e-mail]> wr
ites:

>I have a question for those "resonant experts" (sorry) in the group.
>Regarding parasitic arrays - the yagi is essentially based on the
>1/2-wave dipole, while the quad is based on the fullwave loop. The delta
>version of same is a fullwave loop with three sides. That said...

You can see the quad loop as a horizontal folded dipole where the horizontal
sections are pulled away up to a distance of a quarter  wave and therefore
the horizontal sections become shorter (1/4). Because of that the radiation
resistance becomes lower (75 i.s.o. 300 ohm) in the vertical sections
the current is low and opposite to each other and therefore not radiating very
much(far field). A nice thing is that because the horizontal sections are
a 1/4 wave sepparated the radiation in the vertical plane is more or less
surpressed and giving gain to the horizontal plane.

>I'm thinking about experimenting with some designs which allow for a
>total element length of a half-wavelength, like the yagi, but which
>incorporate the loop design of the quad. My goal here is some sort of
>gain and directional ability, while not requiring the huge aerial
>footprint of either one of these antennas. I'm shooting for the 20/17/15
>meter bands.

>For example, what would happen if you measured according to the yagi
>spec, but instead folded the elements of the beam into loops that
>remained open? In other words, each side (4) of the driven element would
>be 1/8l long and the element would be open on the top (or side, bottom,
>subject to experimentation).

>Does anyone have any thoughts on the viability of this sort of antenna?

It will work, but impedance will be low, current high and therefore losses
can be high if not carefull. Also the antenna will probable smallband.
A nice example to play with with the MN or AO antenna simmulator
on the computer!

regards, Jan,PA0LBN


From [e-mail] Sat Dec 21 12:32:31 1996
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From: [e-mail] (Fractenna)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 1/2-wave 'Quad'?
Date: 20 Dec 1996 03:12:47 GMT
Organization: AOL http://www.aol.com
Lines: 4
Message-ID: <[e-mail]>
References: <[e-mail]>
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X-Admin: [e-mail]

Does this need to be a resonant antenna or will you attach antenna
prophylactics--such as coils--to get the impedence to be purely real?
73
Chip N1IR


From [e-mail] Sat Dec 21 12:32:32 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 1/2-wave 'Quad'?
Date: 20 Dec 1996 05:48:19 GMT
Organization: DigiPhone Corporation, Bryan/College Station Texas 409-693-8885
Lines: 13
Message-ID: <59d9b3$[e-mail]>
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In <[e-mail]>, [e-mail] (Fracten
na) writes:
>Does this need to be a resonant antenna or will you attach antenna
>prophylactics--such as coils--to get the impedence to be purely real?
>73
>Chip N1IR

   Not so close!  They hardly know each other as it is in a really pure sense!

//-----------------------------
Mike - W5WQN
[e-mail]
[e-mail]



From [e-mail] Sat Dec 21 12:32:33 1996
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From: [e-mail] (MARKTAINT)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 1/2-wave 'Quad'?
Date: 20 Dec 1996 06:56:05 GMT
Organization: AOL http://www.aol.com
Lines: 7
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References: <[e-mail]>
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Roger,
You might want to take a look at Les Moxon's book HF Antennas for All
Locations.  He talks a lot about smaller antennas and especially likes
small delta loops.  You might find a discussion of an antenna that
interests you in his book.
Good luck.
Mark, N0YRW


From [e-mail] Sat Dec 21 12:32:34 1996
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From: George Baker <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 1/2-wave 'Quad'?
Date: Thu, 19 Dec 1996 23:30:24 -0600
Organization: Southwestern Bell Internet Services
Lines: 27
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Roger D. Placer wrote:
>
>
> I'm thinking about experimenting with some designs which allow for a
> total element length of a half-wavelength, like the yagi, but which
> incorporate the loop design of the quad. My goal here is some sort of
> gain and directional ability, while not requiring the huge aerial
> footprint of either one of these antennas. I'm shooting for the 20/17/15
> meter bands.
>

I suggest that you get a copy of EZNEC from Roy Lewallen, W7EL and model
the configuration. The program will enable you to try any number of
variations on element lengths, configuration, feed point, etc. This will
give you, I think, a more accurate analysis of this or any reasonable
antenna structure than any other means short of building and testing the
real thing. You can model a conventional Yagi configuration and then
model your proposed configuration and get direct comparisons on
far-field pattern, driving-point impedance, etc.

Give it a try. I have been extremely well pleased with EZNEC and the
capabilities it provides.

--
73, George
W5YR (Original, not vanity)
Fairview, TX


From [e-mail] Sat Dec 21 12:32:35 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 1/2-wave 'Quad'?
Date: 20 Dec 1996 05:44:20 GMT
Organization: DigiPhone Corporation, Bryan/College Station Texas 409-693-8885
Lines: 53
Message-ID: <59d93k$[e-mail]>
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X-Newsreader: IBM NewsReader/2 2.0

In <[e-mail]>, "Roger D. Placer" <[e-mail]> writes:
>I have a question for those "resonant experts" (sorry) in the group.
>Regarding parasitic arrays - the yagi is essentially based on the
>1/2-wave dipole, while the quad is based on the fullwave loop. The delta
>version of same is a fullwave loop with three sides. That said...
>
>I'm thinking about experimenting with some designs which allow for a
>total element length of a half-wavelength, like the yagi, but which
>incorporate the loop design of the quad. My goal here is some sort of
>gain and directional ability, while not requiring the huge aerial
>footprint of either one of these antennas. I'm shooting for the 20/17/15
>meter bands.
>
>For example, what would happen if you measured according to the yagi
>spec, but instead folded the elements of the beam into loops that
>remained open? In other words, each side (4) of the driven element would
>be 1/8l long and the element would be open on the top (or side, bottom,
>subject to experimentation).
>
>Does anyone have any thoughts on the viability of this sort of antenna?
>
>==========================================================
>Roger D. Placer, KA2Z      Lucent Technologies - Bell Labs
>Phone(W) 908.582.3112    Business:       [e-mail]
>FAX(W)   908.582.3662    Personal: [e-mail]
>==========================================================

Before you go a-building, reflect on this a bit.  Think of a quad as being
two closely spaced yagi antennae, 1/4 wave apart, with the tips of your
half wave 'dipoles' of those two closely spaced yagis bent so they touch
each other at the tips.

That said, consider why, as one passes the four and five element mark,
the performance of the quad deteriorates as to expected gain and so on.
It appears that the array length is too short for optimal gain in these
models; the usual opinion is that the spacing needs to get wider in the
stack, the longer the boom length.  Since the conventional quad can't get
farther apart, performance sags, at least in comparison to long boom yagi
antennae of large element numbers.

Looking over the foregoing, maybe we can all get a chuckle out of reflecting
that the quad is a hot little antenna for 3 or 4 elemental reasons, which tend

to be self-excited rascles.   Shortening the loops leads to all kinds of
elemental problems, Watson - nothing left to get excited about?

    :)


//-----------------------------
Mike - W5WQN
[e-mail]
[e-mail]



From [e-mail] Sat Dec 21 12:32:36 1996
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From: [e-mail] (Roy Lewallen)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 1/2-wave 'Quad'?
Date: Fri, 20 Dec 96 19:11:07 GMT
Organization: EZNEC Antenna Software
Lines: 7
Message-ID: <59eoa6$[e-mail]>
References: <[e-mail]>
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X-Newsreader: News Xpress Version 1.0 Beta #3

Looks like you've gotten some good advice from others. One bit I didn't see
was to get a copy of _HF Antennas For All Locations_ by Les Moxon, G6XN.
It's published by the RSGB and I believe sold in this country by the ARRL.
It contains several ideas about compact beams as well as other good
information.

Roy Lewallen, W7EL


From [e-mail] Sat Dec 21 12:32:37 1996
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From: [e-mail] (K1BQT)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 1/2-wave 'Quad'?
Date: 20 Dec 1996 22:12:23 GMT
Organization: AOL http://www.aol.com
Lines: 8
Message-ID: <[e-mail]>
References: <59eoa6$[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

I'm late coming in on this thread, so what I'm suggesting may have been
posted previously.  However, L.B. Cebik has been running an excellent
multi-part series in Communications Quarterly on small beam
antennas--including X-beams, Moxon-squares, and several other types.
Might be an interesting resource.  If you want more specifics, E-mail me
and I'll look up the specifics in the cumulative index.

Rick  K1BQT


From [e-mail] Sat Dec 21 12:32:38 1996
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From: [e-mail] (BillV21572)
Newsgroups: rec.radio.amateur.antenna
Subject: 1:1 balun suggestion???
Date: 17 Dec 1996 22:45:01 GMT
Organization: AOL http://www.aol.com
Lines: 14
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NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

Hey all,

I've got a simple question from my antenna-knowledge deficient mind:  I'm
in the process of putting together a trapped, multiband dipole for
40-80-160 meters.  Since I'm going to coax-feed this thing, would y'all
suggest putting in one of those 1:1 baluns?  As I seem to recall, the
balun will equalize the currents coming from the unbalanced coax to the
balanced antenna, leading to better performance and minimal feedline
radiation, right?  I need to get away especially from feedline radiation.
Any help appreciated; I sure want to do this thing right.
tnx es 73 de Bill   KA9HLN

Bill Vanstralen  KA9HLN  St. Paul, MN  [phone]  [e-mail]



From [e-mail] Sat Dec 21 12:32:39 1996
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From: "Ronald D. Lucier" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 1:1 balun suggestion???
Date: Wed, 18 Dec 1996 09:31:40 -0800
Organization: Optical Hybrids, Inc.
Lines: 25
Message-ID: <[e-mail]>
References: <[e-mail]>
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To: BillV21572 <[e-mail]>

BillV21572 wrote:
>
> Hey all,
>
> I've got a simple question from my antenna-knowledge deficient mind:  I'm
> in the process of putting together a trapped, multiband dipole for
> 40-80-160 meters.  Since I'm going to coax-feed this thing, would y'all
> suggest putting in one of those 1:1 baluns?  As I seem to recall, the
> balun will equalize the currents coming from the unbalanced coax to the
> balanced antenna, leading to better performance and minimal feedline
> radiation, right?  I need to get away especially from feedline radiation.
> Any help appreciated; I sure want to do this thing right.
> tnx es 73 de Bill   KA9HLN
>
> Bill Vanstralen  KA9HLN  St. Paul, MN  [phone]  [e-mail]

Contact "The Radio Works", 1-800-280-8327.  Their catalog is a wonderful
source of good information re baluns.  They also make excellent
equipment.  I replaced an older balun with one of theirs and noticed a
significant drop in QRN.  Guess I had a little galvanic noise.

BTW I have no - zero - commercial connection to them.  Only a satified
customer.

73 de WA1UWZ


From [e-mail] Sat Dec 21 12:32:41 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 1:1 balun suggestion???
Date: Wed, 18 Dec 1996 21:27:38 -0800
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BillV21572 wrote:
>
> Hey all,
>
> I've got a simple question from my antenna-knowledge deficient mind:  I'm
> in the process of putting together a trapped, multiband dipole for
> 40-80-160 meters.  Since I'm going to coax-feed this thing, would y'all
> suggest putting in one of those 1:1 baluns?  As I seem to recall, the
> balun will equalize the currents coming from the unbalanced coax to the
> balanced antenna, leading to better performance and minimal feedline
> radiation, right?  I need to get away especially from feedline radiation.
> Any help appreciated; I sure want to do this thing right.
> tnx es 73 de Bill   KA9HLN
>
> Bill Vanstralen  KA9HLN  St. Paul, MN  [phone]  [e-mail]

Bill,

I've used various ferrite core baluns with good results on 80 and 40.
I'm currently using a balun  from Van Gordon Engineering (inside a dipole
center insulator), but have homebrewed several on Amidon T-200-2 ferrite
toroids and ferrite bars. Comparing dipoles and inverted vees with baluns
to the same antennas without baluns, I've found those with baluns
consistently receive better...less hash and noise.  It's harder for me
to measure feed line radiation, but I think that's reduced also.
No difference found between baluns wound on bars or toroids.  The T-200-2
is said to handle a KW.  It does fine at 200 watts, as does a
1/2" diameter, 4 inch long "swap meet special" ferrite rod.

Mike,  WA3RVS  Burbank, CA


From [e-mail] Sat Dec 21 12:32:42 1996
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From: [e-mail] (K1BQT)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 1:1 balun suggestion???
Date: 18 Dec 1996 23:15:35 GMT
Organization: AOL http://www.aol.com
Lines: 16
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

Hi Bill--

A balun may be a good idea if your feedline runs off at anything other
than a right-angle to the antenna (approaching one leg more than the
other). In my experience, this exacerbates the problem of common-mode RF
current on the outside of the line.  Since you are operating at 160, a
simple choke made from coiled feedline or ferrite sleeves strung on the
cable may not be practical--that would take a lot of coiled line or a lot
of sleeves.  If you wish to wind a 1:1 balun on a  ferrite torroid form,
Jerry Sevik's series on "Baluns and Ununs" in both CQ and Communications
Quarterly might be a good source for information.  For materials, contact
Amadon Associates (see their ad in several amateur publications).  There
are many other sources of information and balun materials as well.  Make
sure the design you use is good at 1.8 MHz.

Rick  K1BQT


From [e-mail] Sat Dec 21 12:32:43 1996
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From: [e-mail] (Roy Lewallen)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 1:1 balun suggestion???
Date: Fri, 20 Dec 96 19:15:18 GMT
Organization: EZNEC Antenna Software
Lines: 13
Message-ID: <59eoi1$[e-mail]>
References: <[e-mail]> <[e-mail]>
NNTP-Posting-Host: ip-pdx08-20.teleport.com
X-Newsreader: News Xpress Version 1.0 Beta #3

In article <[e-mail]>,
   [e-mail] (Graham Seale) wrote:

>. . .
>You can use the classic trifilar 1:1 baluns if you like. the ones wound
>on ferrite rod will not saturate, as opposed to toroids. . .

Baluns made from low-frequency ferrite at least will go up in flames at
flux densities much, much lower than anywhere near saturation at HF. In
this frequency range, you don't need to worry about core saturation.

Roy Lewallen, W7EL



From [e-mail] Sat Dec 21 12:32:44 1996
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From: [e-mail] (Roy Lewallen)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 1:1 balun suggestion???
Date: Fri, 20 Dec 96 19:26:54 GMT
Organization: EZNEC Antenna Software
Lines: 43
Message-ID: <59ep7p$[e-mail]>
References: <[e-mail]> <[e-mail]>
NNTP-Posting-Host: ip-pdx08-20.teleport.com
X-Newsreader: News Xpress Version 1.0 Beta #3

In article <[e-mail]>, [e-mail] wrote:
>BillV21572 wrote:
>>
>> Hey all,
>>
>> I've got a simple question from my antenna-knowledge deficient mind:
I'm
>> in the process of putting together a trapped, multiband dipole for
>> 40-80-160 meters.  Since I'm going to coax-feed this thing, would y'all
>> suggest putting in one of those 1:1 baluns?  As I seem to recall, the
>> balun will equalize the currents coming from the unbalanced coax to the
>> balanced antenna, leading to better performance and minimal feedline
>> radiation, right?  I need to get away especially from feedline
radiation.
>> Any help appreciated; I sure want to do this thing right.
>> tnx es 73 de Bill   KA9HLN
>>
>> Bill Vanstralen  KA9HLN  St. Paul, MN  [phone]
[e-mail]
>
>Bill,
>
>I've used various ferrite core baluns with good results on 80 and 40.
>I'm currently using a balun  from Van Gordon Engineering (inside a dipole
>center insulator), but have homebrewed several on Amidon T-200-2 ferrite
>toroids and ferrite bars. Comparing dipoles and inverted vees with baluns
>to the same antennas without baluns, I've found those with baluns
>consistently receive better...less hash and noise.  It's harder for me
>to measure feed line radiation, but I think that's reduced also.
>No difference found between baluns wound on bars or toroids.  The T-200-2
>is said to handle a KW.  It does fine at 200 watts, as does a
>1/2" diameter, 4 inch long "swap meet special" ferrite rod.
>
>Mike,  WA3RVS  Burbank, CA

It's hard to get enough impedance for an effective balun using a T-200-2
core on 160 meters. At 12 nH/t^2, it would take 61 turns to get the
reasonable amount of 500 ohms impedance at 1.8 MHz. Even on 40m, you'd need
31 turns. This calculation neglects shunt capacitance, which would raise
the impedance some. Has anyone measured a balun like this in this frequency
range?

Roy Lewallen, W7EL


From [e-mail] Sat Dec 21 12:32:45 1996
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From: BRETSKI <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: 2 meter 440 collapsable window antenna
Date: Tue, 17 Dec 1996 09:51:55 -0500
Organization: Purdue University
Lines: 13
Message-ID: <[e-mail]>
NNTP-Posting-Host: storm.atms.purdue.edu
Mime-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII

Gordon West had a window antenna at the seminar awhile back
and it was a square fold-up type that had 2 meter and 440
squares -- neat.

Any idea where I could get one?



BRET A. PENNINGTON / COMPUTER TECH /EARTH & ATMOSPHERIC SCIENCES
317-494-0678 / PURDUE UNIVERSITY  / WEST LAFAYETTE, INDIANA 47907
[e-mail]         /     speaking only for myself.
/\/\/\/\/\/\ --... /\/\/\/\/ N9ZFF \/\/\/\/\/\/\ ...-- /\/\/\/\/\



From [e-mail] Sat Dec 21 12:32:46 1996
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From: [e-mail] (Charles)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 2 meter quad for ssb??hel
Date: Tue, 17 Dec 1996 09:33:27 -0600
Organization: United States Internet, Inc.
Lines: 29
Distribution: world
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: col-max86.dynamic.usit.net

In article <[e-mail]>, [e-mail] (Don Phelps) wrote:

> Jason,
> YES, just put the feed in the middle of the bottom as you show.
>
>  Ba> I was thinking about building a 5 element quad for some 2 meter ssb
>  Ba> work. However, all the plans I have found put the antenna in the
>  Ba> vertical plane and  not horizontal.  I think it is as easy as changing
>  Ba> the so-239 connector from  the vertical section of the director to the
>  Ba> horizontal.. Am I correct?
>  Ba> ____________
>  Ba> |                   |
>  Ba> |                   |
>  Ba> |                   |
>  Ba> X (so-239)     |
>  Ba> |                   |
>  Ba> |                   |
>  Ba> --------X----------
>  Ba> (move to here?)
>
>  Don, N6MCE
>
>
> ... [e-mail]  1:125/104 POBox 9739 San Rafael,CA 94912
> ___ Blue Wave/386 v2.30 [NR]

YES, with this correct answer you have just won the prize cigar.

Charles   KD4HHX


From [e-mail] Sat Dec 21 12:32:47 1996
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From: [e-mail] (Greg LaP.)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 2 meter quad for ssb??hel
Date: Wed, 18 Dec 1996 16:52:21 GMT
Organization: none
Lines: 14
Message-ID: <5997hq$6i6$[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: 205.250.40.2
X-Newsreader: Forte Free Agent 1.0.82


Yes,in a quad type of antenna, move the so-239 to the bottom of the
driven element.  Physically rotate the antenna so the connector is on
the bottom in the middle of the antenna, then reattach the antenna
back to the mounting pole.  The coax connector can either by in the
middle of the side (square shape) or at a corner (diamond shape) as
long as it is at the bottom and in the middle for Horizontal.


                Greg
                VE1-GRE
                [e-mail]




From [e-mail] Sat Dec 21 12:32:48 1996
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From: [e-mail] (Jason Baack)
Newsgroups: rec.radio.amateur.antenna
Subject: 2 meter quad for ssb??help?
Date: Tue, 17 Dec 96 17:38:00 GMT
Organization: University of Maine System
Lines: 20
Message-ID: <596lpa$[e-mail]>
NNTP-Posting-Host: conan.umecut.maine.edu
X-Newsreader: News Xpress 2.0 Beta #2

Holiday Greetings all,

I was thinking about building a 5 element quad for some 2 meter ssb work.
However, all the plans I have found put the antenna in the vertical plane and
not horizontal.  I think it is as easy as changing the so-239 connector from
the vertical section of the director to the horizontal.. Am I correct?

____________
|                   |
|                   |
|                   |
X (so-239)     |
|                   |
|                   |
--------X----------
   (move to here?)

Plus does anyone have the plans for a 5 or 4 element quad for 440?

Thanks    Jason  N1RWY


From [e-mail] Sat Dec 21 12:32:48 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 2 meter quad for ssb??help?
Date: Wed, 18 Dec 1996 04:55:32 GMT
Organization:
Lines: 29
Message-ID: <[e-mail]>
References: <596lpa$[e-mail]>
NNTP-Posting-Host: dialup053.qnsbny1.capital.net
X-Newsreader: Forte Free Agent 1.1/32.230

[e-mail] (Jason Baack) wrote:

>Holiday Greetings all,
>
>I was thinking about building a 5 element quad for some 2 meter ssb work.
>However, all the plans I have found put the antenna in the vertical plane and

>not horizontal.  I think it is as easy as changing the so-239 connector from
>the vertical section of the director to the horizontal.. Am I correct?
>
>____________
>|                   |
>|                   |
>|                   |
>X (so-239)     |
>|                   |
>|                   |
>--------X----------
>   (move to here?)
>
>Plus does anyone have the plans for a 5 or 4 element quad for 440?
>
>Thanks    Jason

Yes, you are right. That's exactly the way to do it. Can't help you
with the plans for 440. Perhaps you could find something by doing a
search on the Web?
--
73,
Butch N2YMJ


From [e-mail] Sat Dec 21 12:32:49 1996
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From: [e-mail] (AM Randle)
Newsgroups: rec.radio.amateur.antenna
Subject: 20kHz Doppler on UHF??!!!
Date: 16 Dec 1996 11:14:33 GMT
Organization: The University of York, UK
Lines: 23
Message-ID: <593aup$[e-mail]>
NNTP-Posting-Host: tower.york.ac.uk
X-Newsreader: TIN [version 1.2 PL2]

Hi,

I would greatly appreciate any opinions and experiences on the subject of
excessive "Doppler shifts".

What I am looking into is a situation (one that I wasn't involved in)
where 20kHz Doppler-like effects were observed on a 1500MHz c/w signal.
If this is Doppler then it's an inordinate amount of frequency spreading.
During initial tests, the frequency spreading didn't exist (suggesting
that the equipment is OK), however during high winds, these effects
started to creep in.

This could either originate from the environment, or the antenna mast
being shaken (ie. causing the null being pointed at the txer to vibrate
upto 20kHz).   A runway was used with trees and other vegetation in the
vicinity.

If anyone has experienced similar problems or know of any cause then I'd
be very interested to hear from them.

Thank you,

Andrew Randle


From [e-mail] Sat Dec 21 12:32:51 1996
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From: [e-mail] (Fractenna)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 20kHz Doppler on UHF??!!!
Date: 16 Dec 1996 18:08:13 GMT
Organization: AOL http://www.aol.com
Lines: 7
Message-ID: <[e-mail]>
References: <593aup$[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

Don't think so... 20 KHz at 1500 MHz is about 5 km/s...not a wind.

This is not a terrestrial (surface) effect OR its not Doppler. What are
you bouncing off?

73
Chip N1IR


From [e-mail] Sat Dec 21 12:32:52 1996
Newsgroups: rec.radio.amateur.antenna
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From: Monty Wilson <[e-mail]>
Subject: Re: 220meter
Message-ID: <[e-mail]>
Sender: [e-mail] (System Administrator)
Mime-Version: 1.0
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greg smith <[e-mail]> wrote:
>Looking to build a 220meter antenna directional. Any Idea where I can
>get a schematic....

An AM radio loopstick antenna is directional; isn't the AM
broadcast band about 220 meters?

Just kidding; I'm sure you mean 220 MHz not meters.  I think
the ARRL Handbook and Antenna book have yagi and quad plans.
--
.........Monty.
mwilson @ flex.net (with spaces deleted)




From [e-mail] Sat Dec 21 12:32:52 1996
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From: [e-mail] (AL7DL)
Newsgroups: rec.radio.amateur.antenna
Subject: Re:  220meter
Date: 12 Dec 1996 02:49:17 GMT
Organization: AOL http://www.aol.com
Lines: 5
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

Assume you mean a 220 MHz (vs. 220 meter) directional antenna (as a 220
meter directional antenna would be a bit on the large side).  I suggest
you start with the ARRL Antenna Handbook.

73, Bryce, AL7DL


From [e-mail] Sat Dec 21 12:32:53 1996
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From: "Vernon Wilkins Jr." <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,/,horizontal,polarization
Subject: 6 meter mobile antenna
Date: Wed, 11 Dec 1996 09:06:31 -0500
Organization: Wilkins Electronics, Inc.
Lines: 6
Message-ID: <[e-mail]>
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Does anybody have any plans for some tyoe of horizontal polarized mobile
antenna for 6 meters?  I have a conversion van with a fiberglass top.

Thanks
Vernon
WA3ROW


From [e-mail] Sat Dec 21 12:32:54 1996
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From: [e-mail] (Matt Larson)
Newsgroups: rec.radio.amateur.antenna
Subject: 6M Antenna Suggestions
Date: Tue, 17 Dec 1996 08:22:55 -0500
Organization: Earthlink Network, Inc.
Lines: 8
Message-ID: <[e-mail]>
NNTP-Posting-Host: cust51.max1.washington.dc.ms.uu.net

   I am a new op to Six, and am in search of antenna suggestions.  In my
current QTH, external antennas are not an option, so I am restricted to
the attic space.  Currently, I am using a homebrew ground plane, which
works OK for FM, but I want  to go to horizontal polarization to work SSB.

Thanks in advance for any suggestions, and 73

Matt


From [e-mail] Sat Dec 21 12:32:55 1996
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From: [e-mail] (Rick Kissell)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 6M Antenna Suggestions
Date: 17 Dec 1996 08:24:22 -0600
Organization: Omnifest
Lines: 16
Distribution: na
Message-ID: <596aem$[e-mail]>
NNTP-Posting-Host: 129.89.70.58

If you're new to 50 MHz, you should seriously consider shelling out 14 bucks
for a (postpaid) copy of "Six Meters: A Guide to the Magic Band" by Ken
Neubeck, WB2AMU.  It's a good, comprehensive intorduction to 6m, covering
antennas, operating procedures, band plans, equipment, and propagation.  It's
available from:

Worldradio Books
Box 189490
Sacramento, CA 95818

(California residents add 93 cents sales tax.)

73,

Rick WB9GYT
Milwaukee, WI


From [e-mail] Sat Dec 21 12:32:56 1996
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From: [e-mail] (Gerald Lopez)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 6M Antenna Suggestions
Date: 19 Dec 1996 10:59:39 GMT
Organization: DESY
Lines: 22
Distribution: na
Message-ID: <59b76r$[e-mail]>
References: <596aem$[e-mail]>
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Rick Kissell ([e-mail]) wrote:
: If you're new to 50 MHz, you should seriously consider shelling out 14 bucks
: for a (postpaid) copy of "Six Meters: A Guide to the Magic Band" by Ken
: Neubeck, WB2AMU.  It's a good, comprehensive intorduction to 6m, covering
: antennas, operating procedures, band plans, equipment, and propagation.  It'
s
: available from:

: Worldradio Books
: Box 189490
: Sacramento, CA 95818

: (California residents add 93 cents sales tax.)

I too can recommmend this book; it helped to really turn me onto 50 Megz.
If I had a criticism though it would be that antennas for 6 metres are
not covered in nearly the depth I would like to see. If anybody knows
of a better work covering 6 metre antennas please let me know; and "yes"
I do have the ARRL Antenna handbook and again there wasn't much stuff
pertaining to the magic band.

   cheers,
             gerry - dd5ax


From [e-mail] Sat Dec 21 12:32:57 1996
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From: [e-mail](Frank Marino )
Newsgroups: rec.radio.amateur.antenna
Subject: 80 meter antenna
Date: 15 Dec 1996 04:18:03 GMT
Organization: Netcom
Lines: 7
Message-ID: <58vu5r$[e-mail]>
NNTP-Posting-Host: chi-il15-08.ix.netcom.com
X-NETCOM-Date: Sat Dec 14 10:18:03 PM CST 1996

I would like to put up an efficient 80 meter antenna for a typical city
lot near the Chicago.  I am presently using a homebrew inverted vee
feed with 450 ohm ladder line.  It is OK but not great.  I hear some DX
but not very well.  The apex is about 50 feet at the top of the tower.
I enjoy DX and would like to work some on 80 meters.  Does anyone have
any suggestions on the type of antenna to use. I prefer not to use a
vertical.  Appreciate any response.  Frank WI9W


From [e-mail] Sat Dec 21 12:32:58 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!news.sprintlink.net!news-hub.sprintlink.net!news.sprintlink.net!news-peer.sprintlink.net!news.sprintlink.net!news-pull.sprintlink.net!news.sprintlink.net!news-stk-11.sprintlink.net!itnews.sc.intel.com!news
From: Cecil Moore <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 80 meter antenna suggestions???
Date: Tue, 17 Dec 1996 16:19:27 -0800
Organization: Intel Corporation
Lines: 12
Message-ID: <[e-mail]>
References: <597alm$[e-mail]>
NNTP-Posting-Host: camoore-desk.ch.intel.com
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 2.01 (WinNT; I)

Frank Marino wrote:
> Does anyone have any suggestions about improving this antenna or putting
> up something else. I don't want to erect a vertical.

Hi Frank, a vertical full wave loop gives a good account of itself
at relatively low heights. I use one for 40m. EZNEC sez that a
rectangle with 100ft horizontal runs at 50ft and 15ft with 35ft
sides would be a reasonable DX antenna if fed at the center of
one side. Feedpoint impedance is close to 50ohms. Gain is about
2.5dBi broadside at TOA=24deg with horizontal beamwidth = 84deg.

73, Cecil, W6RCA, OOTC


From [e-mail] Sat Dec 21 12:32:59 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.net!news.ibm.net.il!arclight.uoregon.edu!worldnet.att.net!ix.netcom.com!news
From: [e-mail](Frank Marino )
Newsgroups: rec.radio.amateur.antenna
Subject: 80 meter antenna suggestions???
Date: 17 Dec 1996 23:34:14 GMT
Organization: Netcom
Lines: 7
Message-ID: <597alm$[e-mail]>
NNTP-Posting-Host: chi-il13-07.ix.netcom.com
X-NETCOM-Date: Tue Dec 17  3:34:14 PM PST 1996

I live on a typical city lot in a suburb close to Chicago. IL.  I would
like to work 75/80 meter DX.  I have put up an inverted v with 134 feet
of wire fed with 450 ohm ladder line.  The top is at 50 feet connected
to the tower.  It works OK but not great for DX.  Does anyone have any
suggestions about improving this antenna or putting up something else.
I don't want to erect a vertical.  A wire antenna connected to tower is
preferred.  Tnx Frank WI9W...


From [e-mail] Sat Dec 21 12:33:00 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!news.sprintlink.net!news-pull.sprintlink.net!news.sprintlink.net!news-peer.sprintlink.net!news.bbnplanet.com!cpk-news-hub1.bbnplanet.com!newsfeed.internetmci.com!demos!jetinf!newsmaster
From: Gene Shablygin <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: 80 Meter capacitor for Butternut HV-9X
Date: Mon, 16 Dec 1996 14:56:39 -0800
Organization: CompuCom Systems, Inc.
Lines: 50
Message-ID: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: relay1.jet.msk.su
Mime-Version: 1.0
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X-Mailer: Mozilla 3.0Gold (Win16; U)

Help wanted!

A couple of weeks ago I got a Butternut HF9VX, which was inteded to
replace the trap vertical I used before. I installed it with CPK
counterpose kit (which electrically loads the antenna, so it
become a sort of vertical dipole, and can resonate without the
radials.

In normal circumstances, this kind of conterpose causes a lot of
earth losses (because it can not decouple from the lossy ground).
But in my case the ground losses seem to be minimal, due to the
excellent conductivity of Dallas soil. (If this antenna has average
earth losses, it has the 80 meter bandwidth about 60 KHz, more
if the losses are higher. My antenna had only 30 KHz bandwidth.
So it sounds like the majority of the RF power is not dissipated,
but radiated).

There were good news. The bad news is: when Butternut designed
its antenna, they probably did not expect the combination of
3 factors:

- low ground losses
- use of CPK kit
- legal limit (1400 W out -- no more: SB-220 CAN'T do more, even on 80).

In my case, result was that the capacitor in the 80 meter loading
tank could survive only a few QSO on 80. Then it blows up, because
of the high RF current.

The first time, I supposed that the capacitor was bad. I called
Butternut, and they sent me a replacement instantly... It
could withstand only 3 QSO...

I can not blame Butternut. They are great guys; their antenna works
fine (all the 3 qso I made were in pile-ups, and all 3 times I was
the first whom the DX answered) but in my specific case their
capacitor is just not tough enough.

QUESTIONS:

1. Did somebody else experienced this trouble?
2. Where can I found a RUGGED dorknob type 200 pF, > 3 kVA, > 10 KV
ceramic capacitor? Or a couple of 100 pF ones?

Please, don't refer to Newark Catalog. $49 per one 100 pF (plus
shipping, plus tax) -- just too much.

Any information will be highly appreciated.

Gene W3UA / RA3AA


From [e-mail] Sat Dec 21 12:33:00 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!news.kei.com!newsfeed.internetmci.com!news.flinet.com!usenet
From: [e-mail] (KE4WBW)
Newsgroups: rec.radio.amateur.antenna
Subject: 900MHZ Dome Ant.?
Date: 13 Dec 1996 00:18:02 GMT
Organization: Florida Internet
Lines: 8
Message-ID: <58q7bq$[e-mail]>
NNTP-Posting-Host: wpb275.flinet.com
Mime-Version: 1.0
Content-Type: Text/Plain; charset=US-ASCII
X-Newsreader: WinVN 0.99.7

        I've seen numerous antenas for GPS that come in a dome form and was
intrigued by the possibilities of using one for 900 mhz receive.
        Does any one know of a source of buying or possibly homebrewing such
an animal?
--
Henry Silvia        [e-mail]
{KE4WBW}            WPB. FLA



From [e-mail] Sat Dec 21 12:33:01 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!news.sprintlink.net!news-hub.sprintlink.net!news.sprintlink.net!news-peer.sprintlink.net!howland.erols.net!portc02.blue.aol.com!audrey01.news.aol.com!not-for-mail
From: [e-mail] (Fractenna)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 900MHZ Dome Ant.?
Date: 15 Dec 1996 14:04:06 GMT
Organization: AOL http://www.aol.com
Lines: 17
Message-ID: <[e-mail]>
References: <58q7bq$[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

I may be ignorant on this one...but is the DOME important or is it
something inside?

I suspect the dome is just a 'radome' to protect the antenna inside. For
GPS this supports (usually) a helix or, more likely, a patch antenna.

The patch antenna, for example, has an almost hemispherical coverage and
is often times a two-sided PCB (often a square) a quarter wave or more on
a side. Its circularly polarized and is not what you want for 900
Megs--need LP AND a good view of horizon, not zenith. Also, many patch
antennas are very narrow band; not a problem for GPS, a big problem for
3-7% apps at 800-900 Megs.

Are you thinking of typical 900 Meg wireless needs?

73
Chip N1IR


From [e-mail] Sat Dec 21 12:33:02 1996
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From: [e-mail] (KE4WBW)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 900MHZ Dome Ant.?
Date: 16 Dec 1996 23:55:21 GMT
Organization: Florida Internet
Lines: 6
Message-ID: <594nh9$[e-mail]>
References: <58q7bq$[e-mail]> <[e-mail]>
NNTP-Posting-Host: wpb316.flinet.com
Mime-Version: 1.0
Content-Type: Text/Plain; charset=US-ASCII
X-Newsreader: WinVN 0.99.7

  Chip, I was toying around with 900mhz pager rececption(monitoring) for
extended coverage or weak signal areas. I'm currently using a Tuf-duck rubber
duckie but it's prone to vandalism in my neiborhood! The 1/4 wave patch
sounds like good idea, I think motorola is now supplying a microstrip ant.
that sounds much like your patch ant. description.



From [e-mail] Sat Dec 21 12:33:03 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!panix!newsgate.nytimes.com!uunet!in1.uu.net!192.35.48.11!hearst.acc.Virginia.EDU!freenet.vcu.edu!saturn.vcu.edu!not-for-mail
From: [e-mail] (Jimmie S Williams)
Newsgroups: rec.radio.amateur.antenna
Subject: 902-928 MHz Log Periodic needed
Date: 16 Dec 1996 23:53:56 -0500
Organization: Virginia Commonwealth University
Lines: 12
Distribution: usa
Message-ID: <595914$[e-mail]>
NNTP-Posting-Host: saturn.vcu.edu


I need a log periodic antenna that covers the 902 MHz to 928 MHz (33
cm) band. I know that Create makes a beastie that covers this
range.... but they want $250.00+ for it! Is there another
manufacturer that is cheaper? Is it possible to homebrew one without
too much trouble?



                                     Robert S. Williams, MD
                                     KD4ZPH
                                     [e-mail]


From [e-mail] Sat Dec 21 12:33:04 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.idt.net!news.bbnplanet.com!cam-news-hub1.bbnplanet.com!howland.erols.net!swrinde!sdd.hp.com!col.hp.com!canyon.sr.hp.com!glenne
From: [e-mail] (Glenn Elmore)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 902-928 MHz Log Periodic needed
Date: 18 Dec 1996 15:50:25 GMT
Organization: Hewlett Packard Sonoma County
Lines: 30
Distribution: usa
Message-ID: <5993s1$[e-mail]>
References: <595914$[e-mail]>
NNTP-Posting-Host: n6gn.sr.hp.com
X-Newsreader: TIN [version 1.2 PL2.2]

Jimmie S Williams ([e-mail]) wrote:

: I need a log periodic antenna that covers the 902 MHz to 928 MHz (33
: cm) band. I know that Create makes a beastie that covers this
: range.... but they want $250.00+ for it! Is there another
: manufacturer that is cheaper? Is it possible to homebrew one without
: too much trouble?


Unless you specifically want a *log periodic*, which would most likely be
able to cover a far wider bandwidth, you might be interested in one
of the Yagi designs I show on the N6GN antenna page,

http://www.tapr.org/~n6gn/antenna/antenna.html

The newer one should have be able to cover the band very nicely with
pretty uniform performance.  The limitation will probably be the
bandwidth of the feed rather than that of the antenna itself which is
50-100 MHz wide.

Glenn Elmore n6gn

amateur IP:     [e-mail]
Internet:       [e-mail]

|--------------- N6GN's Higher Speed Packet WWW Page -------------------|
|                                                                       |
|       http://www.tapr.org/~n6gn/index.html            |
|                                                                       |
|-----------------------------------------------------------------------|


From [e-mail] Sat Dec 21 12:33:05 1996
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!news-out.communique.net!mr.net!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!news.bbnplanet.com!cam-news-hub1.bbnplanet.com!uunet!in3.uu.net!192.80.63.252!delphi.com!usenet
From: "Cecil A. Moore" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: ? USING COAX AS RADIAL ?
Date: Mon, 16 Dec 1996 06:55:40 -0700
Organization: Delphi Internet Services Corporation
Lines: 24
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ip108.phoenix.az.interramp.com
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 2.0 (Win16; U)

[e-mail] wrote:
> Does anyone has an practical experience with using coax (inner and/or shield
)
> inside the building as artifical ground for an external long wire antenna?
> thanks. Danilo +

Hi Danilo, Another way to solve the problem is to use a more balanced
antenna which doesn't necessarily imply a center-fed antenna. Here's
the triangular antenna that I use on 40m, 20m, 15m, and 10m.

                    59ft                  (or this delta configuration)
        +----------------------------+     ===>+-----------------------+
        |                        /                \                 /
        |                    /                       \           /
   20ft |                /                              \     /
        |            /  63ft                               +
        |        /
        |    /
50 ====>+
ohms on 40m

Using a 1:1 choke/balun at the feedpoint will usually eliminate
unbalance and RF in the shack so an RF ground is not required.

73, Cecil, W6RCA, OOTC


From [e-mail] Sat Dec 21 12:33:06 1996
Path: news1.epix.net!news3.epix.net!uunet!in1.uu.net!204.253.208.40!insync!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!news.sgi.com!news-out.microserve.net!news-in.microserve.net!news.supernet.net!nntp.cntfl.com!usenet
From: Joe Foor <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Alinco 2M rigs ???
Date: Sun, 08 Dec 1996 21:09:45 -0600
Organization: CMDS News machine
Lines: 18
Message-ID: <[e-mail]>
References: <[e-mail]> <58ev94$[e-mail]> <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: dial-16.marianna.fl.digitalexp.net
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charles copeland wrote:

> I have heard (read in reviews) that Alinco mobile radios
> run HOT. To hot for comfort. Cheap heat sink is inadequate.

I haven't noticed this is a problem. My Alinco DR-150 does just fine
for normal use. I have lectured continuously for 30 minutes several
times, for the local net of neophytes, and it keeps on working just
fine. It heats up during the first five minutes, but then it seems to
reach it's thermal balance point and doesn't get any hotter.

My Alinco HT used to bother me, until I realised that the batteries
were only 7.5 volts. I turned the power supply down to 7.5 volts also
and the HT stopped getting hot, no matter how long I have it keyed.

regards.
Joe kf4dys



From [e-mail] Sat Dec 21 12:33:07 1996
Newsgroups: rec.radio.amateur.antenna
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!mindspring!uunet!in2.uu.net!199.172.62.14!world!mv!wd1v.mv.com!user
From: [e-mail] (JS)
Subject: Re: ALL xxxxxxx SHOULD DIE
Organization: MV Communications, Inc.
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]> <[e-mail]> <[e-mail]> <[e-mail]> <[e-mail]>
X-Nntp-Posting-Host: wd1v.mv.com
Date: Mon, 16 Dec 1996 11:26:35 GMT
Lines: 26

In article <[e-mail]>, n3tvv
<[e-mail]> wrote:

>>WHAT DOES HATING  xxxxxx PEOPLE  HAVE TO DO WITH THIS NEWS GROUP ??
>>NOTHING !!!!!!!
>>EXPRESS YOUR OPINION SOMEWHERE ELSE
>>BECAUSE FRANKLY WE DON`T GIVE A DAMN!!!!!!!!!!!!!!!!!!!!!!!!!!!!
>>ERIC ,N3TVV([e-mail])

Hi Eric:

Repeating the slur in your post is not a good practice IMHO. We can XXXXXXX
it out, get the point across, and not continue the practice of using
communications with words that hurt others.

73,


                John D. Seney |_|_|_|_| [e-mail]
            144 Pepperidge Dr |_|   |_| page [e-mail]
    Manchester, NH 03103-6150 |_|_ _|_| [e-mail]
      voice mail 603.533.3472 | | | | | fax [phone]

            Digital Scope.FAQ + Amateur Radio.FAQ + Macnet

                   http://www.mv.com/ipusers/wd1v


From [e-mail] Sat Dec 21 12:33:08 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!newsfeed.internetmci.com!news.infi.net!usenet
From: Jack Fox <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.shortwave
Subject: Re: Amplified Indoor Antenna
Date: Mon, 16 Dec 1996 23:08:22 -0800
Organization: InfiNet
Lines: 25
Message-ID: <[e-mail]>
References: <01bbebc9$33fb9460$8d4292cf@knight>
Reply-To: [e-mail]
NNTP-Posting-Host: pa3dsp1.richmond.infi.net
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Xref: news1.epix.net rec.radio.amateur.antenna:32807 rec.radio.shortwave:90593

Markus Kafurke wrote:
>
> Hi,
>
> I want to extend my listening range, and therefore want to get an amplified
> antenna. I was thinking about buying either something inexpensive like the
> Radio Shack 20-280 or something halfway decent from a manufacturer like
> Sony of MFJ.
> Does anybody have any experience with these antennas? I would appreciate
> any advice on performance and if the equipment is worth the money.
>
> Bye, mk.


I was in the same boat your in a few months ago trying to decide on
spending $100 on a Grove MiniTuner or a Radio Shack 20-280 for $29.
I posted the same question and got the opinion that the Radio Shack was
just as good as the more expensive tuners from Grove or MFJ or Palomar.
And they were right.  The Radio Shack works great for me and my set up
of using a 90 ft. longwire with a coaxial lead in.  Save your money and
try the Radio Shack first.

Good Luck

Jack Fox


From [e-mail] Sat Dec 21 12:33:09 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!worldnet.att.net!newsadm
From: "Markus Kafurke" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.shortwave
Subject: Amplified Indoor Antenna
Date: 17 Dec 1996 03:19:47 GMT
Organization: AMK
Lines: 12
Message-ID: <01bbebc9$33fb9460$8d4292cf@knight>
NNTP-Posting-Host: 207.146.66.141
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Xref: news1.epix.net rec.radio.amateur.antenna:32810 rec.radio.shortwave:90596

Hi,

I want to extend my listening range, and therefore want to get an amplified
antenna. I was thinking about buying either something inexpensive like the
Radio Shack 20-280 or something halfway decent from a manufacturer like
Sony of MFJ.
Does anybody have any experience with these antennas? I would appreciate
any advice on performance and if the equipment is worth the money.

Bye, mk.




From [e-mail] Sat Dec 21 12:33:10 1996
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From: "Markus Kafurke" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.shortwave
Subject: Re: Amplified Indoor Antenna
Date: 17 Dec 1996 19:08:14 GMT
Organization: AMK
Lines: 4
Message-ID: <01bbec4d$b4901900$275492cf@knight>
References: <01bbebc9$33fb9460$8d4292cf@knight>
NNTP-Posting-Host: 207.146.84.39
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Xref: news1.epix.net rec.radio.amateur.antenna:32830 rec.radio.shortwave:90619

Thanks everybody for the advice. I think I will give the RS antenna a try.

Bye, mk.



From [e-mail] Sat Dec 21 12:33:10 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.idt.net!news.bbnplanet.com!cam-news-hub1.bbnplanet.com!howland.erols.net!news-peer.gsl.net!news.gsl.net!portc01.blue.aol.com!audrey01.news.aol.com!not-for-mail
From: [e-mail] (EIRINGO)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Amplified Indoor Antenna
Date: 17 Dec 1996 17:05:52 GMT
Organization: AOL http://www.aol.com
Lines: 3
Message-ID: <[e-mail]>
References: <01bbebc9$33fb9460$8d4292cf@knight>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

AMPLIFIED ANTENNAS DONT REALLY PICK UP MORE SIGNALS THAN A
LONG WIRE, BUT CAN BE BETTER THAN A WHIP. THE RS ONE IS JUNK. THE BEST AT
A REASONABLE PRICE OF $107 IS LF H800.


From [e-mail] Sat Dec 21 12:33:11 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.net!news.ibm.net.il!arclight.uoregon.edu!mr.net!newshub.tc.umn.edu!fu-berlin.de!news-ber1.dfn.de!zrz.TU-Berlin.DE!news.tu-chemnitz.de!news
From: [e-mail] (Michael Kniest)
Newsgroups: rec.radio.amateur.antenna,rec.radio.shortwave
Subject: Re: Amplified Indoor Antenna
Date: 18 Dec 96 11:21:47 GMT
Organization: University of Technology Chemnitz, FRG
Lines: 15
Message-ID: <598ko8$[e-mail]>
References: <01bbebc9$33fb9460$8d4292cf@knight> <01bbec4d$b4901900$275492cf@knight>
NNTP-Posting-Host: herkules.hrz.tu-chemnitz.de
Xref: news1.epix.net rec.radio.amateur.antenna:32884 rec.radio.shortwave:90687

"Markus Kafurke" <[e-mail]> writes:

>Thanks everybody for the advice. I think I will give the RS antenna a try.

>Bye, mk.

I could need some advice too. My problem: poor reception in a multi-
storey building of reinforced concrete. I experiment with wire antennas,
but the possibities are, of course, limited.
Firstly: Could an amplifier be here of any help?
And: Something like that available in Germany?
Thanx in advance
Bye, mk




From [e-mail] Sat Dec 21 12:33:14 1996
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From: Paul Carter <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.shortwave
Subject: Re: Amplified Indoor Antenna
Date: Fri, 20 Dec 1996 08:59:52 -0500
Organization: NETCOM Network Operations
Lines: 31
Message-ID: <[e-mail]>
References: <01bbebc9$33fb9460$8d4292cf@knight> <[e-mail]>
NNTP-Posting-Host: dhcp_112.digilab.bio-rad.com
Mime-Version: 1.0
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Xref: news1.epix.net rec.radio.amateur.antenna:32972 rec.radio.shortwave:90820

Jack Fox wrote:
>
> Markus Kafurke wrote:
> >
> > Hi,
> >
> > I want to extend my listening range, and therefore want to get an amplifie
d
> > antenna. I was thinking about buying either something inexpensive like the
> > Radio Shack 20-280 or something halfway decent from a manufacturer like
> > Sony of MFJ.
> > Does anybody have any experience with these antennas? I would appreciate
> > any advice on performance and if the equipment is worth the money.
> >
> > Bye, mk.
>
> I was in the same boat your in a few months ago trying to decide on
> spending $100 on a Grove MiniTuner or a Radio Shack 20-280 for $29.
> I posted the same question and got the opinion that the Radio Shack was
> just as good as the more expensive tuners from Grove or MFJ or Palomar.
> And they were right.  The Radio Shack works great for me and my set up
> of using a 90 ft. longwire with a coaxial lead in.  Save your money and
> try the Radio Shack first.
>
> Good Luck
>
> Jack Fox

The RS amp is good (I use two, one at home and one at work,) but there's
one bug.
The low frequency cutoff is about 3Mhz.  So it is useless for listening
to the 160M ham band or the 2Mhz Marine band.


From [e-mail] Sat Dec 21 12:33:14 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!news.sprintlink.net!news-hub.sprintlink.net!news.sprintlink.net!news-pen-16.sprintlink.net!news.dgsys.com!news.dgsys.com!sloth.swcp.com!tesuque.cs.sandia.gov!corvette.mst6.lanl.gov!newshost.lanl.gov!ncar!gatech!csulb.edu!hammer.uoregon.edu!arclight.uoregon.edu!worldnet.att.net!newsadm
From: "Gary J. Wilt Jr." <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.shortwave
Subject: Re: Amplified Indoor Antenna
Date: 17 Dec 1996 15:25:17 GMT
Organization: AT&T WorldNet Services
Lines: 16
Message-ID: <01bbec2f$3a552fe0$[e-mail]>
References: <01bbebc9$33fb9460$8d4292cf@knight>
NNTP-Posting-Host: 207.146.34.64
X-Newsreader: Microsoft Internet News 4.70.1155
Xref: news1.epix.net rec.radio.amateur.antenna:32997 rec.radio.shortwave:90847

I have had the Radio shack amplified antenna for about 6 months now. All I
can say is its's GREAT! Very pleased with its performance. With it I'm able
to hear alot of low
power tropical stations (in the 4-5Mhz. that I was unable to hear before).
I highly recommend it to anyone. I have yet to try it with an external
antenna.

Markus Kafurke <[e-mail]> wrote in article
<01bbebc9$33fb9460$8d4292cf@knight>...
> Hi,
>
> I want to extend my listening range, and therefore want to get an
amplified
> antenna. <snip snip>
>
>


From [e-mail] Sat Dec 21 12:33:15 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!news.sprintlink.net!news-hub.sprintlink.net!news.sprintlink.net!news-peer.sprintlink.net!howland.erols.net!www.nntp.primenet.com!nntp.primenet.com!enews.sgi.com!news.sgi.com!cygnus.com!news.zeitgeist.net!news.greatbasin.net!dick
From: [e-mail] (Dick Flanagan)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Antenna Clipart
Date: Wed, 11 Dec 1996 10:43:49 -0800
Organization: Libelle Productions, Inc., Minden, Nevada USA
Lines: 12
Distribution: world
Message-ID: <[e-mail]>
References: <58mf67$[e-mail]>
NNTP-Posting-Host: merlin.libelle.com
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
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In article <58mf67$[e-mail]>, Merv Stump
<"[e-mail]"@postoffice.worldnet.att.net> wrote:

>I'm trying to put together a presentation for a local club and could use
>some antenna pictures.  Anyone have a clipart source you can refer me
>to?

Check out the ARRL collection.  It is quite extensive.

http://oak.oakland.edu:8080/pub/hamradio/arrl/bbs/clipart/
--
Dick Flanagan W6OLD CFII Minden, Nevada


From [e-mail] Sat Dec 21 12:33:16 1996
Path: news1.epix.net!news3.epix.net!uunet!in3.uu.net!204.127.130.5!worldnet.att.net!newsadm
From: Merv Stump <"[e-mail]"@postoffice.worldnet.att.net>
Newsgroups: rec.radio.amateur.antenna
Subject: Antenna Clipart
Date: Wed, 11 Dec 1996 09:07:33 -0500
Organization: AT&T WorldNet Services
Lines: 3
Message-ID: <58mf67$[e-mail]>
NNTP-Posting-Host: 207.116.42.143
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X-Mailer: Mozilla 2.02E (Win95; I)

I'm trying to put together a presentation for a local club and could use
some antenna pictures.  Anyone have a clipart source you can refer me
to?  Thanks, Merv


From [e-mail] Sat Dec 21 12:33:17 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.net!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!vixen.cso.uiuc.edu!newsfeed.internetmci.com!news.cyberhighway.net!not-for-mail
From: Alan Davenport <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Antenna Clipart
Date: Fri, 13 Dec 1996 20:22:15 -0800
Organization: KB7CW
Lines: 18
Message-ID: <[e-mail]>
References: <58mf67$[e-mail]>
Reply-To: [e-mail]
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Merv Stump wrote:
>
> I'm trying to put together a presentation for a local club and could use
> some antenna pictures.  Anyone have a clipart source you can refer me
> to?  Thanks, Merv

http://ftp.barc.org:8080/pub/hamradio/arrl/bbs/clipart/

--
\  \  \  \
 \--\--\--\     http://www.cyberhighway.net/~adavenpo
  \  \| \  \                    ----------------------------------
      H       DE KB7CW          | "640K ought to be enough        |
      H       Alan Davenport    |   for anybody."                 |
      H                         |              Bill Gates, 1981   |
      H                         ----------------------------------
      H
      H


From [e-mail] Sat Dec 21 12:33:18 1996
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From: John P Smith <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Antenna Clipart
Date: 17 Dec 1996 05:08:06 GMT
Organization: Monumental Network Systems
Lines: 11
Distribution: inet
Message-ID: <5959rn$[e-mail]>
NNTP-Posting-Host: ki4ro.mnsinc.com

Merv Stump <"[e-mail]"@postoffice.worldnet.att.net> writes: > I'
m trying to put together a presentation for a local club and could use
> some antenna pictures.  Anyone have a clipart source you can refer me
> to?  Thanks, Merv

I don't have an answer for you Merv but I would very much like to hear
from you when you find a source.

Happy Holidays!

John - KI4RO
http://www.mnsinc.com/ki4ro


From [e-mail] Sat Dec 21 12:33:19 1996
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From: "Garth (KA7MHN)" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Antenna Clipart
Date: Wed, 18 Dec 1996 21:43:20 -0700
Organization: inQuo Internet [phone]
Lines: 4
Distribution: world
Message-ID: <[e-mail]>
References: <58mf67$[e-mail]> <[e-mail]>
Reply-To: [e-mail]
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Hi,
You might also try  http://www.barrysclipart.com/  as a source.

73 de Garth KA7MHN


From [e-mail] Sat Dec 21 12:33:20 1996
From: [e-mail] (Francis Taillon)
Newsgroups: rec.radio.amateur.antenna
Subject: Antenna help wanted
Date: Wed, 18 Dec 1996 22:40:55 GMT
Reply-To: [e-mail]
X-Newsreader: Forte Free Agent 1.0.82
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Message-ID: <[e-mail]>
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Lines: 25
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Hi!

        I'm currently using a VHF satellite network (Orbcomm) in remote
monitoring application. My main problem is the size of the antenna
which make it too visible to vandalism and thieft. The antenna I
currently use is about 45 inch long and has 4 32 inch long radials.
I'm looking for a small/compact antenna that could be hidden easily.
Here are some specs:

Frequency range: 138-150 Mhz
Transmitter power: 5 watts
The gain can be unity or more
For some reason, in my application, the antenna need a ground plane
(work ok without it anywhere else!!). I might be able to find a way to
make it work without it so a built in ground plane is not important.

If anybody knows a manufacturer who has that kind of antenna, or a
place where i could find some information about antennas, please
E-mail me!

Thanks
Francis Taillon
[e-mail]




From [e-mail] Sat Dec 21 12:33:22 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!news.kei.com!newsfeed.internetmci.com!newsbuffer.myriad.net!news.myriad.net!usenet
From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Antenna help wanted
Date: 19 Dec 1996 17:29:24 GMT
Organization: DigiPhone Corporation, Bryan/College Station Texas 409-693-8885
Lines: 64
Message-ID: <59bu1k$[e-mail]>
References: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: dialup553.myriad.net
X-Newsreader: IBM NewsReader/2 2.0

In <[e-mail]>, [e-mail] (Francis Taillon) writes:
>Hi!
>
>       I'm currently using a VHF satellite network (Orbcomm) in remote
>monitoring application. My main problem is the size of the antenna
>which make it too visible to vandalism and thieft. The antenna I
>currently use is about 45 inch long and has 4 32 inch long radials.
>I'm looking for a small/compact antenna that could be hidden easily.
>Here are some specs:
>
>Frequency range: 138-150 Mhz
>Transmitter power: 5 watts
>The gain can be unity or more
>For some reason, in my application, the antenna need a ground plane
>(work ok without it anywhere else!!). I might be able to find a way to
>make it work without it so a built in ground plane is not important.
>
>If anybody knows a manufacturer who has that kind of antenna, or a
>place where i could find some information about antennas, please
>E-mail me!
>
>Thanks
>Francis Taillon
>[e-mail]

Although it looks a little long for this frequency, the problem you will likel
y
face is that as antennae get smaller, relative to the full size needed, the
performance goes down.

I assume that in your case, everything has been worked out so that 5 watt
uplink power plus the performance of the antenna supplied meets the uplink
needs for the data.

That being so, reducing the size of the antenna by adding coils to make it
shorter *MAY* wind up in a situation in which the uplink performance will
be too poor to get you home to the mother bird.   :)

When we reduce the size of antennae for receiving work, we can sometimes
amplify the reduced signal we get cheaply and easily to make up for that.
Thus for receiving things, antennae can get smaller, maybe, easily.

The only solution to the loss of efficiency on the transmitting side, is
the opposite of the receiver deal, amplifying the power, or going to more
than 5 watts.  Things like this are often much more difficult or may,
as in your situation, be impossible....    legally.....    Professional
communications applications like this are generally type-approved as to
the equipment, antennae and so on to make sure that the signals do not
create more than an alloted amount of clutter for other users of the channel.

We can sometimes make up for smaller sizes by making beam antennae for
things that are used between points that are in a known direction all the
time, or move in ways that we can know where to move the antenna to
keep up with a moving target.   If this bird does not move and the signal
polarity can be determined, you might be able to make a shortened beam
antenna with loaded elements that has elements on it like TV antenna
types.   It might be less noticed if a small beam were there than the type
antenna you now use.  If that can be done, going to a little beam could
help make up for the gain you lost in reducing the size..

//-----------------------------
Mike - W5WQN
[e-mail]
[e-mail]



From [e-mail] Sat Dec 21 12:33:23 1996
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From: CHRISTOPHER MCCALL <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Antenna in attic?
Date: Thu, 12 Dec 1996 16:40:19 -0500
Organization: Wright State University
Lines: 5
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
NNTP-Posting-Host: alpha.wright.edu
Mime-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
X-Sender: [e-mail]
In-Reply-To: <[e-mail]>

 You might try Cushcraft's three element dual band yagi, around $45,
thats
what I use in my apartment "attic" since I have about 52" verticle it's a
tight fit. But the gain is great. 73 KB8YPO Chris Dayton OH.



From [e-mail] Sat Dec 21 12:33:24 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!node2.frontiernet.net!usenet
From: Jim Porter <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Antenna in attic?
Date: Sat, 14 Dec 1996 23:11:39 -0500
Organization: Frontier Internet Rochester N.Y. (716)-777-SURF
Lines: 29
Message-ID: <[e-mail]>
References: <[e-mail]>
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Gary T. Craze wrote:
>
> The subdivision that I moved into does not allow outside antennas of any
> kind.   I do have quite a bit of room in the attic, which is above the
> second story of my house.  The roof pitch is quite steep, and thus I
> have about 12 feet from the "floor"  of the attic to the peek of the
> roof.  I have an older ICOM IC-3200A 25W 2M/440 mobile unit that has
> been used as a base station in the past, but I'm not sure about the
> performance of an inside antenna.   The roof has standard composite
> shingles over plywood, and the base of the antenna would be about 20
> feet above the ground (the height of the floor in the attic).  I'm
> looking at some of the dual band antennas like the Diamond X-200A or the
> Cushcraft dual band Ringos.
>
> Any suggestions?
>
> Many thanks,
> Gary

Gary,

I have been using a Cushcraft AR-270 with 50 watts out under
identical conditions and can hit every repeater for over
50 miles.  I also have a 40 meter dipole, a 5 element quad
for 2 meters that has worked over 250 miles on SSB.  I didn't
think it would work either, but you have to do what you
have to do to get on the air.  Go for it.

Jim, KB2YWS  (And someplace I actually have a Compaq!!)


From [e-mail] Sat Dec 21 12:33:25 1996
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From: [e-mail] (P.J. "Josh" Rovero)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Antenna in attic?
Date: 13 Dec 1996 02:12:53 GMT
Organization: Connix - The Connecticut Internet Exchange
Lines: 8
Message-ID: <58qe35$[e-mail]>
References: <[e-mail]> <[e-mail]> <[e-mail]>
Reply-To: [e-mail] (P.J. "Josh" Rovero)
NNTP-Posting-Host: ocean.connix.com
X-Newsreader: IBM NewsReader/2 2.0

I used one of these in a small apartment house in Monterey, CA years ago.

It was S-shaped -- went from the left front corner (viewed from above)
of the attic, up the the peak of the roof, then the length of the building,
then down the roof line to the back right corner.  Fed it with about
20 feet of twin lead.  Did great from 40-10, and not too badly on 80/75.




From [e-mail] Sat Dec 21 12:33:26 1996
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From: Frank Krozel <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Antenna in attic?
Date: Mon, 16 Dec 1996 09:31:03 -0800
Organization: Netcom
Lines: 5
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Reply-To: [e-mail]
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I have used one of these for years, first using it when building my
house.  Mine is cut for 40, 20, 15, & 10.   40 is in an S configuration
when viewed from the top.  After a long day of nailing, etc., it was
great to get on 40 cw with a cold one to relax...  KG9H.
7.040


From [e-mail] Sat Dec 21 12:33:27 1996
Message-ID: <[e-mail]>
Date: Mon, 16 Dec 1996 12:17:17 -0800
From: Tim Johnston - KF4FTP <[e-mail]>
Reply-To: [e-mail]
Organization: Hapco, Division of Kearney Nat'l
X-Mailer: Mozilla 3.0 (Win16; I)
MIME-Version: 1.0
Subject: Re: Antenna in attic?
References: <[e-mail]>
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Lines: 16
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Frank Krozel wrote:
>
> I have used one of these for years, first using it when building my
> house.  Mine is cut for 40, 20, 15, & 10.   40 is in an S configuration
> when viewed from the top.  After a long day of nailing, etc., it was
> great to get on 40 cw with a cold one to relax...  KG9H.
> 7.040

I was considering the same.  Just out of curosity -- what is the
dimension of your attic?  How did you decide on an "S" pattern?  What
are the rest of the antennas shaped like?
--
Tim Johnston, KF4FTP
E-mail:  mailto:[e-mail] -or- mailto:[e-mail]
Web: http://www.hapcopoles.com


From [e-mail] Sat Dec 21 12:33:29 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!super.zippo.com!zdc-e!dataphone!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!worldnet.att.net!uunet!in1.uu.net!204.253.208.40!insync!news.hal-pc.org!not-for-mail
From: "Dale Martin" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Antenna in attic?
Date: 19 Dec 1996 01:03:25 GMT
Organization: Houston Area League of PC Users
Lines: 36
Message-ID: <01bbed48$7132bf40$[e-mail]>
References: <[e-mail]> <[e-mail]>
NNTP-Posting-Host: pm6-79.hal-pc.org
X-Newsreader: Microsoft Internet News 4.70.1155

I had pretty much the same configuration KG9H had.  I was in a subdivision
with deed restrictions against any outside antennas.  The 40m dipole was a
Z configuration.  I cut it long, then trimmed to resonance.
The house was rectangular with attached garage, so that made it very
symmetrical and easy (as easy as climbing around in the attic can be in
Texas during the summer at 5:00am (coolest time of the day)).

I put up two 10m dipoles; each at right angles to the other.  It worked
great.  It was just before the peak of the sunspot cycle and it really made
a big difference.

73,

--
Dale Martin
[e-mail]
http://www.hal-pc.org/~kg5u

Tim Johnston - KF4FTP <[e-mail]> wrote in article
<[e-mail]>...
> Frank Krozel wrote:
> >
> > I have used one of these for years, first using it when building my
> > house.  Mine is cut for 40, 20, 15, & 10.   40 is in an S configuration
> > when viewed from the top.  After a long day of nailing, etc., it was
> > great to get on 40 cw with a cold one to relax...  KG9H.
> > 7.040
>
> I was considering the same.  Just out of curosity -- what is the
> dimension of your attic?  How did you decide on an "S" pattern?  What
> are the rest of the antennas shaped like?
> --
> Tim Johnston, KF4FTP
> E-mail:  mailto:[e-mail] -or- mailto:[e-mail]
> Web: http://www.hapcopoles.com
>


From [e-mail] Sat Dec 21 12:33:30 1996
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From: james beasley <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Antenna Q
Date: 20 Dec 1996 11:15:26 GMT
Organization: AT&T WorldNet Services
Lines: 7
Message-ID: <59dsge$[e-mail]>
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KC6VWY here, HI

Just wondering if any one knows where I can get info on JoGun antennas?
Catalog or internet site.

Thaks, [e-mail]



From [e-mail] Sat Dec 21 12:33:30 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!nntp.crl.com!frog.inetworld.net!usenet
From: "ETHAN HUNT" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: antenna using RS catalog #
Date: 15 Dec 1996 22:32:48 GMT
Organization: Simply Internet, San Diego
Lines: 4
Message-ID: <01bbead7$dbeaffa0$[e-mail]>
NNTP-Posting-Host: dialin223.inetworld.net
X-Newsreader: Microsoft Internet News 4.70.1155

saw posting telling how to use radio shack catalog #278.502.  only thing
r/s can tell me is that it is 50 ft of cord.  i cant find it in catalog.
please e-mail me if you can tell me what this cord is.



From [e-mail] Sat Dec 21 12:33:31 1996
Newsgroups: rec.radio.amateur.antenna
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.net!www.nntp.primenet.com!nntp.primenet.com!visi.com!newsfeeder.toronto.ican.net!torfree!bl818
From: [e-mail] (Charlie Bennett)
Subject: Antenna's for AM
Message-ID: <[e-mail]>
Organization: Toronto Free-Net
X-Newsreader: TIN [version 1.2 PL2]
Date: Fri, 20 Dec 1996 19:36:27 GMT
Lines: 13

Have any of you tried the Select-A-Tenna for AM reception? I'd like to
get some feedback before I buy it.

Is there any AM antenna that's better? I have a 200ft wire that's
alright, nothing like what I need. Thanks much

Charlie Bennett
[e-mail]
--
"The [Coventry] Climaxes vibrated so badly that at the first race at Spa,
Gurney had to stop his car in order to urinate, propping a rock against
the tire while the car idled and he relieved himself".
                                  (Indy Racing Legends/Tony Sakkis, P.63)


From [e-mail] Sat Dec 21 12:33:32 1996
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From: [e-mail] (Maillet Dominique)
Newsgroups: rec.radio.amateur.antenna
Subject: antenne for 80 m
Date: Fri, 20 Dec 1996 09:53:44 -400
Organization: Mines de Douai
Lines: 6
Message-ID: <59dk8d$[e-mail]>
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X-NewsReader: QNews v0.9b4 Beta 15 Apr 1994 (Evaluation period expired -- 122 days).

pse, I want to build  antenne for 80 m for work in CW.
my garden square 12m * 15m .  is to short for mount W3DZZ.
witch sort of antenna advise me ?


TNX. F5TSW


From [e-mail] Sat Dec 21 12:33:34 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!vixen.cso.uiuc.edu!news.stealth.net!newsfeed.uk.ibm.net!news-m01.ny.us.ibm.net!news-s01.ca.us.ibm.net!not-for-mail
From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Any ideas?
Date: 13 Dec 1996 22:59:09 GMT
Lines: 24
Message-ID: <58sn3t$urg$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: slip129-37-205-200.in.us.ibm.net
X-Newsreader: IBM NewsReader/2 2.0


 Hi,
 I have two 160 meter loops. Both are approximately 541 feet long. Both are
 actually trapezoidal in shape. Both are horizontally oriented. Both are are
 center fed (not at a corner). Both are no higher than 50' at any point, nor
 lower than 15' (fifteen) at the lowest point. The only thing separating the
 two loops is my house. I realize that at that low altitude, I've essentially
 a vertical antenna. I had so much luck, (actual on the air reports) that I
 decided to put the second loop up to operate from a different part of the
 house.  Both loops are fed with 50 ohm coax. Using my Palomar Noise bridge,
 and an MFJ-259, the original loop measures 50 ohms. But the new one measures
 the expected 100 ohms. While I'm glad that the 'old' one matches out better,
 I'd like some practical ideas as to what I could do to lower that 100 ohm
 feedpoint resistance toward 50 ohms. Along with the 50 and 100 ohms
 respectively, both loops are showing no reactance. Both are about as broad
 banded, and the SWR follows the frequency track very close.  ie 1:1.1 on the
 original to 1:2.0 on the new one at fo. at 40 KHz up or down, the correspondi
ng
 values are very close. Hmmmmm.

 I'd like to use either antenna for the upcoming 160 meter challenge. Incident
ally,
 I didn't hear too many in this newsgroup during the ARRL 160 CW contest.
 No interest?

                                                                 Jim W9LZ


From [e-mail] Sat Dec 21 12:33:35 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!metro.atlanta.com!uunet!in2.uu.net!165.87.194.248!news-m01.ny.us.ibm.net!news-s01.ca.us.ibm.net!not-for-mail
From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Any ideas?
Date: 15 Dec 1996 18:14:55 GMT
Lines: 43
Message-ID: <591f6v$1qi6$[e-mail]>
References: <58sn3t$urg$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: slip129-37-205-215.in.us.ibm.net
X-Newsreader: IBM NewsReader/2 2.0

In <58sn3t$urg$[e-mail]>, [e-mail] writes:
>
> Hi,
> I have two 160 meter loops. Both are approximately 541 feet long. Both are
> actually trapezoidal in shape. Both are horizontally oriented. Both are are
> center fed (not at a corner). Both are no higher than 50' at any point, nor
> lower than 15' (fifteen) at the lowest point. The only thing separating the
> two loops is my house. I realize that at that low altitude, I've essentially
> a vertical antenna. I had so much luck, (actual on the air reports) that I
> decided to put the second loop up to operate from a different part of the
> house.  Both loops are fed with 50 ohm coax. Using my Palomar Noise bridge,
> and an MFJ-259, the original loop measures 50 ohms. But the new one measures
> the expected 100 ohms. While I'm glad that the 'old' one matches out better,
> I'd like some practical ideas as to what I could do to lower that 100 ohm
> feedpoint resistance toward 50 ohms. Along with the 50 and 100 ohms
> respectively, both loops are showing no reactance. Both are about as broad
> banded, and the SWR follows the frequency track very close.  ie 1:1.1 on the
> original to 1:2.0 on the new one at fo. at 40 KHz up or down, the correspond
ing
> values are very close. Hmmmmm.
>
> I'd like to use either antenna for the upcoming 160 meter challenge. Inciden
tally,
> I didn't hear too many in this newsgroup during the ARRL 160 CW contest.
> No interest?
>
>                                                                 Jim W9LZ

   Gee whiz!
  I'm replying to my own post.  I've had some very fine Email's highlighting
 how I can 'lower' the apparent feedpoint impedance for the 100 ohm loop.
 I guess, I was unclear as to what I'm really looking for. The question is:
 'Why is the 50 ohm antenna behaving in the way it is?' One further piece
 of info, the 50 ohm loop is being fed with 15-18 feet of RG-58A/U. Which
 comes no where near a quarter wave stub on 160.

                                                     Thanks - Jim W9LZ










From [e-mail] Sat Dec 21 12:33:36 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Anybody using NEC4WIN from Orion?
Date: 16 Dec 1996 13:47:25 GMT
Lines: 8
Message-ID: <593jtd$h90$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: slip129-37-205-122.in.us.ibm.net
X-Newsreader: IBM NewsReader/2 2.0

Hi,
 I came across the 'demo copy' of this program. The demo is a little too
restrictive in allowing the ability to see what the program can really
do. So does anyone have any 'live' experience with this package, that
they can pass along? How much does it cost?

                                                       Thank You
                                                       Jim - W9LZ


From [e-mail] Sat Dec 21 12:33:37 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!news.kei.com!newsfeed.internetmci.com!howland.erols.net!www.nntp.primenet.com!nntp.primenet.com!news.mindspring.com!usenet
From: [e-mail] (david l. thompson)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Anybody using NEC4WIN from Orion?
Date: Tue, 17 Dec 1996 17:58:58 GMT
Organization: MindSpring Enterprises, Inc.
Lines: 18
Message-ID: <596m7b$[e-mail]>
References: <593jtd$h90$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: user-168-121-41-202.dialup.mindspring.com
X-Server-Date: 17 Dec 1996 17:45:15 GMT
X-Newsreader: Forte Free Agent 1.0.82

[e-mail] wrote:

>Hi,
> I came across the 'demo copy' of this program. The demo is a little too
>restrictive in allowing the ability to see what the program can really
>do. So does anyone have any 'live' experience with this package, that
>they can pass along? How much does it cost?

>                                                       Thank You
>                                                       Jim - W9LZ

I agree Jim,

The program is $30 shipped so still am tempted to get the full version
to try it out.

Dave K4JRB



From [e-mail] Sat Dec 21 12:33:38 1996
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From: Madjid <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Anybody using NEC4WIN from Orion?
Date: Tue, 17 Dec 1996 18:43:44 -0500
Organization: ORION Microsystems
Lines: 31
Message-ID: <[e-mail]>
References: <593jtd$h90$[e-mail]>
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To: [e-mail]

[e-mail] wrote:
>
> Hi,
>  I came across the 'demo copy' of this program. The demo is a little too
> restrictive in allowing the ability to see what the program can really
> do. So does anyone have any 'live' experience with this package, that
> they can pass along? How much does it cost?

Hi Jim,

I don't understand why you say that the demo is "too restrictive".
Except the fact that you can't reload the projects that you designed
you can do EVERYTHING else!

You can enter wires, with more than 150 pulses, simulate the antenna,
get the impedance, plot patterns, look at antenna and currents in 3D,
plot resonance curves, etc, etc...

I looks like you didn't read the documentation and associated Help file
at all, or maybe your copy is incomplete ?

The price is 30$ in North America (+5$ outside) and it is specified in
the help file too, when you click on "ordering info" in the entry panel.

If you got a version < 1.8 maybe you should get the last
version from my page.

Madjid, VE2GMI
-------------------
Madjid, VE2GMI - Home Page: http://www.CAM.ORG/~mboukri
NEC4WIN Antenna simulation for Windows


From [e-mail] Sat Dec 21 12:33:39 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!news.sprintlink.net!news-peer.sprintlink.net!news.sprintlink.net!news-hub.sprintlink.net!news.sprintlink.net!news-dc-10.sprintlink.net!news.rain.net!nntp0.teleport.com!usenet
From: Philip Peake <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: ARRL antenna handbook - 6M yagi
Date: Thu, 12 Dec 1996 08:40:07 -0800
Organization: Teleport - Portland's Public Access [phone]
Lines: 22
Message-ID: <[e-mail]>
NNTP-Posting-Host: vogon.rain.com
Mime-Version: 1.0
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X-Mailer: Mozilla 3.0 (X11; I; SunOS 5.5 sun4c)

I recently bought a copy of the ARRL Antenna Handbook, and was
thinking of building a 6M yagi.

There is a page (just one page ...) on optimised 6M yagis.
But I suspect that there is a diagram (or two) and maybe some
text missing.

The tables giving spacings and elementy lengths are very unclear.

Has anyone built these designs ?

I *assume* that the elements are composed of two sections of
Al tubing, and that the lengths are for one "side" ???

So where I see something like: Seg. 1 36"  / Seg 2. 22.5"
I should assume this means one length of large diameter tubing,
6' in length, and two sections of smaller tubing, slid inside
the ends, protruding an extra 22.5" on each side ?????

I'm not impressed with what I got for my $30 ....

Philip


From [e-mail] Sat Dec 21 12:33:40 1996
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From: Utter Chaos <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Attaching radials to j-pole?
Date: Fri, 13 Dec 1996 23:58:17 -0800
Organization: KAOS 104.7 FM
Lines: 6
Message-ID: <[e-mail]>
Reply-To: [e-mail]
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On one side of the line I hear people stating that the j-pole requires
no ground plane, while other say that it is a poor performer because it
lacks one.  If I attach 4 1/4 wave radials, where do I attach them?
Right on the extension elbo below the lower part of the tuning stub?  Or
will this drastically alter its performance?



From [e-mail] Sat Dec 21 12:33:40 1996
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From: [e-mail] (Tom Bruhns)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Attaching radials to j-pole?
Date: 16 Dec 1996 18:30:41 GMT
Organization: Hewlett Packard Corvallis Site
Lines: 29
Message-ID: <5944gh$[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: hplsnb.lsid.hp.com
X-Newsreader: TIN [version 1.1 PL9.4]

Utter Chaos ([e-mail]) wrote:
: On one side of the line I hear people stating that the j-pole requires
: no ground plane, while other say that it is a poor performer because it
: lacks one.  If I attach 4 1/4 wave radials, where do I attach them?
: Right on the extension elbo below the lower part of the tuning stub?  Or
: will this drastically alter its performance?

If you put a Jaguar body on a pickup truck frame, is it a pickup, or a
Jaguar, or neither?  I would recommend thinking about this in a little
different way:  Mount a vertical radiator above a 4-radial ground plane.
Now feed the (unbalanced) feedpoint with an appropriate feed system to
match the feedpoint impedance.  If you want to feed a half-wave radiator
against 4 quarter-wave radials, you could use a matching system made of
a couple lengths of RG-213 type line with a "T" connector between them,
working like the usual bottom quarter wave open line section on a J-pole.
If the radiator is large enough diameter to keep the feedpoint impedance
reasonably low (say 500 ohms or so), the losses in the 213 shouldn't be
too bad.  Then you can coil up the RG-213, and you can attach the whole
thing to a metal mast.  You could also make the matching section out of
copper pipe and copper wire, or even copper pipe inside copper pipe.
The inner copper pipe could then just continue on up to become the
radiator, but you'd want to make the ratio of pipe diameters fairly large
so the impedance of that matching section isn't too low.   This way of
doing the feed is just an analog of the open-wire line in the J-pole.

--
Cheers,
Tom
[e-mail]


From [e-mail] Sat Dec 21 12:33:42 1996
Newsgroups: rec.radio.amateur.antenna
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.net!www.nntp.primenet.com!nntp.primenet.com!cs.utexas.edu!wotan.compaq.com!twisto.eng.hou.compaq.com!news
From: "Gary T. Craze" <[e-mail]>
Subject: Attic Antenna Revisited.....
Message-ID: <[e-mail]>
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Many thanks to all those who responded to my request for advice on a
2M/440 antenna in the attic.

Based on a lot of research, I've narrowed it down to two choices, both
being CushCraft antennas.  The choices are being made primarily on space
availability versus performance.  The two antennas I'm looking at are
the CushCraft AR-270 and the AR-270B.  These are both dual band
antennas, the primary difference being the 270 is 3.7 feet tall with
3.7dB gain on 2 meters, and 5.5dB on 70cm, and the 270B is 7.7 feet tall
with 5.5dB on 2 meters and 7.5dB on 70cm.  The price differential is
only about $25.

I have two attic spaces.  The upper attic is approx. 20 feet above the
ground (above the second story) and the lower attic is approx. 10 feet
above the ground.  Here's the catch:  The upper attic only has room for
the shorter 3.7 foot AR-270, but the lower attic has room for the 7.7
foot AR-270B.  Also, if the antenna were in the upper attic, it would
have to make about a 50 foot cable run back to the base, versus an
antenna in the lower attic would only have to make about a 25 foot cable
run.

Given the tradeoffs between antenna height, difference in antenna
size/performance and length of cable run, which way would you go?

Many thanks in advance,
Gary
--
______________________________
Gary T. Craze

Visit the Glass Cockpit at
http://rampages.onramp.net/~gcraze

Visit the Compaq ACE Aviator Flying Club Homepage at
http://www.MageNet.com/~brichard/caa/

Compaq Computer Corp.
Enterprise Computing Group
Mainstream Servers

[e-mail]
281-514-7893

All comments contained herein do not necessarily represent the views of
Compaq Computer Corporation


From [e-mail] Sat Dec 21 12:33:43 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!ais.net!noc.van.hookup.net!laslo.netnet.net!node2.frontiernet.net!usenet
From: Jim Porter <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Attic Antenna Revisited.....
Date: Wed, 18 Dec 1996 23:00:28 -0500
Organization: Frontier Internet Rochester N.Y. (716)-777-SURF
Lines: 30
Message-ID: <[e-mail]>
References: <[e-mail]>
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Gary T. Craze wrote:
>
> Many thanks to all those who responded to my request for advice on a
> 2M/440 antenna in the attic.
>
> Based on a lot of research, I've narrowed it down to two choices, both
> being CushCraft antennas.  The choices are being made primarily on space
> availability versus performance.  The two antennas I'm looking at are
> the CushCraft AR-270 and the AR-270B.  These are both dual band
> antennas, the primary difference being the 270 is 3.7 feet tall with
> 3.7dB gain on 2 meters, and 5.5dB on 70cm, and the 270B is 7.7 feet tall
> with 5.5dB on 2 meters and 7.5dB on 70cm.  The price differential is
> only about $25.
> >
> Many thanks in advance,
> Gary
> --
> ______________________________
> Gary T. Craze

Hi again Gary,

I would always opt for the height.  The 2db gain does not offset
doubling the height if you want to get some range.  The lower
antenna will give you a great signal, but not much range.  I have
the Cushcraft 270 in my attic and just finished talking on a net
held on a repeater over 70 miles away on 10 watts.  The higher you
go the longer your reach.

73, Jim


From [e-mail] Sat Dec 21 12:33:45 1996
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!news-out.communique.net!mr.net!visi.com!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!surfnet.nl!news.unisource.nl!news.worldonline.nl!usenet
From: Leo Potjewijd <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Attic Antenna Revisited.....
Date: 19 Dec 1996 21:21:59 GMT
Organization: Lazy Lion
Lines: 39
Message-ID: <59cbln$[e-mail]>
References: <[e-mail]> <[e-mail]>
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Gary T. Craze wrote:

> [snip]
>Here's the catch:  The upper attic only has room for
>the shorter 3.7 foot AR-270, but the lower attic has room for the 7.7
>have to make about a 50 foot cable run back to the base, versus an
>antenna in the lower attic would only have to make about a 25 foot cable
>run.
> [snip]
> Many thanks in advance,
> Gary
> --
> ______________________________
> Gary T. Craze

Hi Gary,
to quote Jim Porter on this:
>I would always opt for the height.  The 2db gain does not offset
>doubling the height if you want to get some range.  The lower
>antenna will give you a great signal, but not much range.  I have
>the Cushcraft 270 in my attic and just finished talking on a net
>held on a repeater over 70 miles away on 10 watts.  The higher you
>go the longer your reach.
>
>73, Jim

BUT... use very low loss cable (of coarse..:) or the cable loss will compensat
e
the antenna height.
I am using a homebrew 1/4 wavelength monobander for 2m in the attic of my home
 in
Amsterdam, at about 70 feet above ground. Since I live on the first floor of t
he
building, about 60 feet of coax (right now RG58, but will update to POPE's H10
00
low loss cable next weekend) is needed.
With 5 Watts this gives me approx. 20 miles radius, with some blind spots caus
ed
by central heating pipes.
The next step for me is to construct a dualband J-beam and put that up so I ca
n
also work 70 cm.

good luck and 73, Leo



From [e-mail] Sat Dec 21 12:33:45 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!news.sprintlink.net!news-pull.sprintlink.net!news.sprintlink.net!news-stk-11.sprintlink.net!lu3.in.net!news
From: red dog <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Automated Satellite tracking with PC ?
Date: Fri, 20 Dec 1996 19:35:20 +0000
Organization: INTERNET Indiana
Lines: 7
Message-ID: <[e-mail]>
Reply-To: [e-mail]
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Does anyone out there know if there is a package that can be used to
track satellites with a PC and automaticly aim your antenna at the
selected target?  If anyone can help I would appriciate information.

Thanks
Michael
[e-mail]


From [e-mail] Sat Dec 21 12:33:47 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.net!www.nntp.primenet.com!nntp.primenet.com!news.sgi.com!swrinde!news-relay.us.dell.com!jump.net!grunt.dejanews.com
Date: Wed, 11 Dec 1996 22:31:09 -0600
From: [e-mail]
Subject: Re: Balanced Feeders!
Newsgroups: rec.radio.amateur.antenna
Message-ID: <[e-mail]>
Organization: Deja News Usenet Posting Service
References: <[e-mail]> <[e-mail]> <[e-mail]>
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Lines: 33

Hello Cecil.

In article <[e-mail]>,
  Cecil Moore <[e-mail]> wrote:

> Hi Dave, I've homebrewed a "balanced pi network" and it works great:
>
>  4  --------+------inductance------+---------
>  /          |                      |
>  1         cap                    cap
>             |                      |
>  b  gnd-----+----------------------+    to 450 ohm transmission line
>  a          |                      |
>  l         cap                    cap
>  u          |                      |
>  n  --------+------inductance------+---------
>
> This could be done with two identical unbalanced tuners. The tuner(s)
> is/are tuned for 200 ohms resistive balanced impedance at the input.
> The caps and inductors can be ganged for ease of tuning but with
> independent control over the reactances, one can even perfectly
> balance the parallel currents. Two used unbalanced tuners cost about
> the same as one new unbalanced tuner.

Would you mind telling me the values of variable capacitors and inductors, and

the frequency range of your balanced pi tuner? I am planning to build a simila
r
tuner that hopefully covers 3.5MHz-28MHz. But I have difficulty to find out
appropriate values of the components. TKS

-----
 Takashi Mori AA9AT/4
-------------------==== Posted via Deja News ====-----------------------
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From [e-mail] Sat Dec 21 12:33:49 1996
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From: Cecil Moore <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Balanced Feeders!
Date: Thu, 12 Dec 1996 13:19:15 -0800
Organization: Intel Corporation
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[e-mail] wrote:
> Would you mind telling me the values of variable capacitors and inductors, a
nd
> the frequency range of your balanced pi tuner?  Takashi Mori AA9AT/4

Hi Takashi, I used two Johnson rotary inductors from my junk box - I don't
know the inductance. The caps are 20-180 pf from Fair Radio Sales. I plug
in whatever additional parallel caps are necessary into banana sockets on
the tuner. The caps are bathtubs from my junk box. But I never feed a
transmission line very far away from a current maximum (loop) thereby
minimizing the value of the reactances required.

73, Cecil, W6RCA, OOTC


From [e-mail] Sat Dec 21 12:33:49 1996
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From: Tore Stabell Kuloe <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: baluns, longwires, etc.
Date: Thu, 19 Dec 1996 01:21:02 +0100
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Hi out there in radio land!

Sorry to bother you, people in this newsgroup seem to have experienced a
lot in your time, so I'll be rude enough to ask:
1)If I use a dipole with a balun in the feedpoint an coax in to a 50ohm
input, will it be a gig improvement over a longwire?
2) Is the balun supposed to be a 1:1 balun (is a dipole 50 ohms
exaxt...?)
3)As I listen to aircraft communications on several bands and will have
a problem of choosing the lenght of the dipole, will a T2FD-antenne be a
good point?

(more here)
http://swl.sds.se/antenn/t2design.html
http://swl.sds.se/antenn/t2fd.html

Merry christmas and many questions from

the notorious asker
Tore
--

Tore Stabell Kuloe  (Kul°)
[e-mail]
Bjoernemyr terrasse 20
N-1453 Bjoernemyr
NORGE - NORWAY


From [e-mail] Sat Dec 21 12:33:50 1996
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From: [e-mail] (Dick Flanagan)
Newsgroups: rec.radio.amateur.antenna
Subject: Bandhopper Antenna (Was Re: BB3 antenna)
Date: Fri, 13 Dec 1996 12:43:57 -0800
Organization: Libelle Productions, Inc., Minden, Nevada USA
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In article <[e-mail]>,
[e-mail] (Steve Bratcher) wrote:
>I bought the antenna after reading several recommendations of it on this
>conference as well as elsewhere. Unfortunately, my experience has left me ver
y
>upset and I could not recommend the BB3 to anyone. This is frustrating as I
>believe, as W7AV wrote, that this is basically a good antenna but the many
>production faults cripple the final product. I look forward to comments from
>other owners.

I am not a BB3 owner, because I had heard many reports like yours.  They're
okay in rather sterile, light-duty operation, but for lots of real-world
mobiling, they tend to fall apart.

That is the reason I spent a lot of time on 14.302.5 listening to the
long-haul truckers.  They tend to run 300-400 watt amplifiers and easily
put 100,000 tough miles a year on their antennas.  They have almost all
gone to Ben Grace's Bandhopper antenna.  It is an industrial strength 10-30
MHz antenna that costs about twice what a standard screwdriver will, but
they are machined to last forever.

I would suggest folks call or write Ben at:

   Avtech of Montana
   PO Box 138
   Clancy, MT 59634
   1-406-933-5646

and he will send you a very detailed info pack.

Ben (WA7BEF) only advertises by word-of-mouth, because he doesn't want to
get a ton of orders.  He is a retired machinist and builds each antenna
himself.  I have one and I'm not ever going to get rid of it!!
--
Dick Flanagan W6OLD CFII Minden, Nevada


From [e-mail] Sat Dec 21 12:33:52 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: BANDHOPPER Mobile
Date: 15 Dec 96 00:09:58 GMT
Organization: ucsd usenet gateway
Lines: 2
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NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]

http://ourworld.compuserve.com/homepages/feb7aw/
 Here you will the best mobile ant made by man


From [e-mail] Sat Dec 21 12:33:53 1996
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From: [e-mail] (Steve Bratcher)
Newsgroups: rec.radio.amateur.antenna
Subject: BB3 antenna
Date: 12 Dec 96 23:34:37 GMT
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Lines: 44
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NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]

>David Solomon wrote:
> Does anyone know anything about the BB3 mobile 80-10m antenna?  I read a

>Rick Perry W7AV wrote:
>David, as far as I am concerned the BB3 is the best of all the
>"screwdriver" antenna's out there.  It's the strongest, will handle a KW

Gentlemen,

   I am just now seeing this message from November as I have been on a cross
country driving vacation. I installed a new BB3 the day before I left town.
After over 5800 miles of experience I would like to add my two cents worth.
I found the BB3 to have very poor workmanship/quality control. I installed the

antenna on a trailer hitch mount. I followed the instructions about grounding
of the antenna and its cabling. On the first attempt to drive the antenna moto
r
I blew a fuse. I opened the control box and discovered that a switch jumper wa
s
shorting out with another switch contact. I pried the jumper up slightly which

cured the short. However, whether due to the shorting out or just a plain bad
switch, I was unable to reverse drive polarity. As time was short I did not
replace the switch but had to manually switch DC power lines every time I
reversed drive motion.
    While installing the top whip per their instructions I had to temporarily
slide the protective cover off of the coil. I found that the portion of the
bottom mast, which is made of copper, that was hidden by the cover was pitted
as though it had been exposed for some time to condensation. I admit that this

was minor and seemingly only cosmetically troublesome.
    Actual performance on the road was good. I did have a few instances when i
t
was difficult to get a good match on a band. This problem was intermittant and

not repeatable. After of few days of driving in rain and snow I discovered tha
t
the lower copper mast was green with corrosion. Is there a reason  why this
mast should not have been protected from the elements with a coat of
polyurethane for example.
   Finally, The antenna binds when being driving the coli back into the tube
and kerchunks its way down in fits.

I bought the antenna after reading several recommendations of it on this
conference as well as elsewhere. Unfortunately, my experience has left me very

upset and I could not recommend the BB3 to anyone. This is frustrating as I
believe, as W7AV wrote, that this is basically a good antenna but the many
production faults cripple the final product. I look forward to comments from
other owners.

73 de steve WE5X/3



From [e-mail] Sat Dec 21 12:33:54 1996
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From: Rick Perry <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: BB3 antenna
Date: Sat, 14 Dec 1996 03:52:23 -0800
Organization: Wolfe Internet Access, L.L.C.
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Steve Bratcher wrote:
>
> >David Solomon wrote:
> > Does anyone know anything about the BB3 mobile 80-10m antenna?  I read a
>
> >Rick Perry W7AV wrote:
> >David, as far as I am concerned the BB3 is the best of all the
> >"screwdriver" antenna's out there.  It's the strongest, will handle a KW
>
> Gentlemen,
>
>    I am just now seeing this message from November as I have been on a cross
> country driving vacation. I installed a new BB3 the day before I left town.
> After over 5800 miles of experience I would like to add my two cents worth.
> I found the BB3 to have very poor workmanship/quality control. I installed t
he
> antenna on a trailer hitch mount. I followed the instructions about groundin
g
> of the antenna and its cabling. On the first attempt to drive the antenna mo
tor
> I blew a fuse. I opened the control box and discovered that a switch jumper
was
> shorting out with another switch contact. I pried the jumper up slightly whi
ch
> cured the short. However, whether due to the shorting out or just a plain ba
d
> switch, I was unable to reverse drive polarity. As time was short I did not
> replace the switch but had to manually switch DC power lines every time I
> reversed drive motion.
>     While installing the top whip per their instructions I had to temporaril
y
> slide the protective cover off of the coil. I found that the portion of the
> bottom mast, which is made of copper, that was hidden by the cover was pitte
d
> as though it had been exposed for some time to condensation. I admit that th
is
> was minor and seemingly only cosmetically troublesome.
>     Actual performance on the road was good. I did have a few instances when
 it
> was difficult to get a good match on a band. This problem was intermittant a
nd
> not repeatable. After of few days of driving in rain and snow I discovered t
hat
> the lower copper mast was green with corrosion. Is there a reason  why this
> mast should not have been protected from the elements with a coat of
> polyurethane for example.
>    Finally, The antenna binds when being driving the coli back into the tube
> and kerchunks its way down in fits.
>
> I bought the antenna after reading several recommendations of it on this
> conference as well as elsewhere. Unfortunately, my experience has left me ve
ry
> upset and I could not recommend the BB3 to anyone. This is frustrating as I
> believe, as W7AV wrote, that this is basically a good antenna but the many
> production faults cripple the final product. I look forward to comments from
> other owners.
>
> 73 de steve WE5X/3

Steve,
   I am really sorry to hear about your problems with the BB3.  Mine is
several years old and has never failed me under all types of conditions,
with snow/ice build-up, high speed driving, etc.  I am wondering if
there has been some changes in production since I got mine?  You see
alot of them here in the northwest because that's where they are made,
but reading recent posting's it appears the company has problems.  The
people that own the company are really great to work with and I think
you should be in-line for a new antenna.  These things never happened
when the antenna first came out.  Very unfortunate.

73's Rick, W7AV


From [e-mail] Sat Dec 21 12:33:55 1996
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From: [e-mail] (bob puharic)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: BB3 antenna
Date: Sun, 15 Dec 1996 02:33:50 GMT
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[e-mail] (Steve Bratcher) wrote:


>    I installed a new BB3 the day before I left town.
>After over 5800 miles of experience I would like to add my two cents worth.
>I found the BB3 to have very poor workmanship/quality control.

Unfortunately, I have to agree. I got one in August, set it up and it
worked fine...for  a week. then the little matching transformer
blew...im only running 70 watts. Called the company, they sent a new
one...this one didnt even work at all...they said theyd had quality
problems with their transformers, and the owner sent me the toroid off
his truck. worked fine, so they sent me a new new one...works fine
except antenna wont match on 20 meters...since it worked originally,
cant be me...

when it works, it works fine. ive worked cape verde and ireland from
the truck...but had it sinc august and used it about a dozen
times...other times it's been off air.

If i had to do it  over again, id probably look at high sierra
antennas.



From [e-mail] Sat Dec 21 12:33:56 1996
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From: Raj Singh <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: BB3 antenna
Date: Tue, 17 Dec 1996 00:07:46 -0800
Organization: CADVision Development Corp.
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Rick Perry wrote:
>
> Steve Bratcher wrote:
> >
> > >David Solomon wrote:
> > > Does anyone know anything about the BB3 mobile 80-10m antenna?  I read a
> >
> > >Rick Perry W7AV wrote:
> > >David, as far as I am concerned the BB3 is the best of all the
> > >"screwdriver" antenna's out there.  It's the strongest, will handle a KW
> >
Just saw this posting:

I have a BB3 and it works great. Although I haven't done much mobiling
this year, last year it was on for abt 8 months - 30,000 km. I all ways
got good reports and had trouble free performance.

My biggest hassle was when it was -35 to -40 C it wouldn't go up and
down! Instead of trying to overcome this engineering problem, I would
rather some one try to figure out how to warm this country up in Jan.
Seriously, even big rotors have problems at those temps.

73
Raj VE6RAJ


From [e-mail] Sat Dec 21 12:33:57 1996
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From: INSIGHT Services <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Best 2m Directional ?
Date: Wed, 11 Dec 1996 11:55:39 -0500
Organization: Concentric Internet Services
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Mime-Version: 1.0
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I would like to build a 2m directional for fox and jammer hunts. Any
suggestions on the best one would be apprecited. Thanks.

---
Susan Driggers
QTH EM85
In the Mountains of Eastern Tennessee, USA
DX-394 with 100 foot Random Wire
Kenwood TS-520S with 35 foot Random Wire
Real radios glow in the dark !




From [e-mail] Sat Dec 21 12:33:58 1996
Newsgroups: rec.radio.amateur.antenna
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From: [e-mail] (Jens Goerke)
Subject: Re: Best 2m Directional ?
X-Newsreader: TIN [version 1.2 PL2]
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INSIGHT Services ([e-mail]) wrote:
> I would like to build a 2m directional for fox and jammer hunts. Any
> suggestions on the best one would be apprecited. Thanks.

Try the HB9CV, it uses two phased elements to perform like a 3-4
element yagi.

73, Jens, DB9LL
--
at work: [e-mail], [e-mail] (http://barbara.combtx.com/~jg)
at home: [e-mail]
at play: jg@beach, griffin@rpg, db9ll@g-qrp/darc
"You beeped me for WHAT?"


From [e-mail] Sat Dec 21 12:33:58 1996
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From: aor <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Best 2m Directional ?  Active Antenna Kits available
Date: Sun, 15 Dec 1996 18:59:37 -0500
Organization: gteais-org
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To: INSIGHT Services <[e-mail]>

I found a dealer in CA who sells an active antenna which plugs into your
HT.  We built MANY of these at a club meeting.  Parts count is about 20,
full circuit board and instruction manual.

Cost is about $20 delivered (bulk).  Our club is very active in building
small kits.  (Something like 40 of these kits.)  We have another fox
hunt scheduled.  This kit was featured in QST.  We has a blast, and the
kits work very well.

Contact:
Stephen Douglas, N6TLD
DF Systems
PO Box 246925
Sacramento, CA 95824-6925
916-440-9082 (Leave a very short message - 20 seconds - he will call you
right back)

73,

Al, NW2M
President MARC Club


From [e-mail] Sat Dec 21 12:33:59 1996
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From: "Matthew K. Hudes" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Best HF Vertical?
Date: Fri, 13 Dec 1996 22:49:47 -0800
Organization: NetGate Communications
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I am considering upgrading my Gap Eagle DX antenna which got twisted in
last winter's storms.  My QTH demands a vertical. Does anyone have an
opinion on what is the best multi-band HF vertical (with no radials)?  I
am aware of the Cushcraft R-7000, a new Gap model Titan DX, and a German
one I saw advertised a few months ago in QST.  Are there any recent
comparative tests?  Thanks for your help.


From [e-mail] Sat Dec 21 12:34:00 1996
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From: ken coleman <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Best HF Vertical?
Date: Sat, 14 Dec 1996 23:06:07 -0500
Organization: MountainNet, Inc. Morgantown WV 800.444.1458
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Matthew K. Hudes wrote:
>
> I am considering upgrading my Gap Eagle DX antenna which got twisted in
> last winter's storms.  My QTH demands a vertical. Does anyone have an
> opinion on what is the best multi-band HF vertical (with no radials)?  I
> am aware of the Cushcraft R-7000, a new Gap model Titan DX, and a German
> one I saw advertised a few months ago in QST.  Are there any recent
> comparative tests?  Thanks for your help.

I have no comparative experience, but have had grat results/reports,
Dxing with 100 watts and GAP Titan.



From [e-mail] Sat Dec 21 12:34:01 1996
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From: ken coleman <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Best HF Vertical?
Date: Sat, 14 Dec 1996 23:09:50 -0500
Organization: MountainNet, Inc. Morgantown WV 800.444.1458
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ken coleman wrote:
>
> Matthew K. Hudes wrote:
> >
> > I am considering upgrading my Gap Eagle DX antenna which got twisted in
> > last winter's storms.  My QTH demands a vertical. Does anyone have an
> > opinion on what is the best multi-band HF vertical (with no radials)?  I
> > am aware of the Cushcraft R-7000, a new Gap model Titan DX, and a German
> > one I saw advertised a few months ago in QST.  Are there any recent
> > comparative tests?  Thanks for your help.
>
> I have no comparative experience, but have had grat results/reports,
> Dxing with 100 watts and GAP Titan.

make that "great" results



From [e-mail] Sat Dec 21 12:34:02 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Best HF Vertical?
Date: Tue, 17 Dec 1996 03:29:54 GMT
Organization: A customer of Pacific Bell Internet Services
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ken coleman <[e-mail]> wrote:

>ken coleman wrote:
>>
>> Matthew K. Hudes wrote:
>> >
>> > I am considering upgrading my Gap Eagle DX antenna which got twisted in
>> > last winter's storms.  My QTH demands a vertical. Does anyone have an
>> > opinion on what is the best multi-band HF vertical (with no radials)?  I
>> > am aware of the Cushcraft R-7000, a new Gap model Titan DX, and a German
>> > one I saw advertised a few months ago in QST.  Are there any recent
>> > comparative tests?  Thanks for your help.
>>
>> I have no comparative experience, but have had grat results/reports,
>> Dxing with 100 watts and GAP Titan.
>
>make that "great" results
>
Contact Hy-Gain and take al look at the
HY-Gain Hy-Tower, there are a bit pricey
but if they are good enough for Antartica
and hold up there, they will survive your
winters well.. I had two of them back in
the last 70' and they work very well

73


From [e-mail] Sat Dec 21 12:34:02 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Best HF Vertical?
Date: Wed, 18 Dec 1996 22:17:44 -0800
Organization: Pacific Bell Internet Services
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Matthew K. Hudes wrote:
>
> I am considering upgrading my Gap Eagle DX antenna which got twisted in
> last winter's storms.  My QTH demands a vertical. Does anyone have an
> opinion on what is the best multi-band HF vertical (with no radials)?  I
> am aware of the Cushcraft R-7000, a new Gap model Titan DX, and a German
> one I saw advertised a few months ago in QST.  Are there any recent
> comparative tests?  Thanks for your help.

Hello
Go with the GAP Titan.
I'vw haDd mine up since May.
Great piece of work.
Folks a GAP are great if you need assistance.
Just put it together out of the box as directed and plug in.
Lou
KB6FFT


From [e-mail] Sat Dec 21 12:34:03 1996
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From: ken coleman <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Best HF Vertical?
Date: Thu, 19 Dec 1996 18:53:15 -0500
Organization: MountainNet, Inc. Morgantown WV 800.444.1458
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[e-mail] wrote:
>
> Matthew K. Hudes wrote:
> >
> > I am considering upgrading my Gap Eagle DX antenna which got twisted in
> > last winter's storms.  My QTH demands a vertical. Does anyone have an
> > opinion on what is the best multi-band HF vertical (with no radials)?  I
> > am aware of the Cushcraft R-7000, a new Gap model Titan DX, and a German
> > one I saw advertised a few months ago in QST.  Are there any recent
> > comparative tests?  Thanks for your help.
>
> Hello
> Go with the GAP Titan.
> I'vw haDd mine up since May.
> Great piece of work.
> Folks a GAP are great if you need assistance.
> Just put it together out of the box as directed and plug in.
> Lou
> KB6FFT

I agree with Lou
Ken
W8BSA



From [e-mail] Sat Dec 21 12:34:04 1996
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From: [e-mail] (Kg0jn)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Best HF Vertical?
Date: 20 Dec 1996 01:29:17 GMT
Organization: AOL http://www.aol.com
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X-Admin: [e-mail]

Matthew Hudes writes:

>I am considering upgrading my Gap Eagle DX antenna which got twisted in
>last winter's storms.  My QTH demands a vertical. Does anyone have an
>opinion on what is the best multi-band HF vertical (with no radials)?  I
>am aware of the Cushcraft R-7000, a new Gap model Titan DX, and a German
>one I saw advertised a few months ago in QST.  Are there any recent
>comparative tests?  Thanks for your help.

I've had the GAP Titan up for about 8 months now and have had great
success with it.  Besides it's performance on the air, it's stood up to
some very strong winds as well...this past summer we had a number of
strong thunderstorm gusts, some exceding 70 mph! And some days with
constant winds over 30 mph and gusts over 50.  No damage and the thing is
NOT guyed.  (can't guy it in my situation)

Good luck es 73!

Eric, KG0JN


From [e-mail] Sat Dec 21 12:34:05 1996
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From: [e-mail] (Dick Flanagan)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Bonding antenna grounds
Date: Wed, 11 Dec 1996 10:47:23 -0800
Organization: Libelle Productions, Inc., Minden, Nevada USA
Lines: 10
Distribution: world
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In article <58k7op$[e-mail]>, [e-mail] wrote:
>Not at all.  It is just that the average ham seems to be unaware of what the
>level of investment is to protect gear, that's all.

PolyPhaser has their own web site and is a good place to order their $22
lightning "bible."  They give a 10% discount to hams and are "Good People."

http://www.polyphaser.com
--
Dick Flanagan W6OLD CFII Minden, Nevada


From [e-mail] Sat Dec 21 12:34:06 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Book on antenna theory and design
Date: 15 Dec 96 20:28:24 GMT
Organization: ucsd usenet gateway
Lines: 12
Message-ID: <[e-mail]>
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]

Another responce:

++++++++++++++++++++++++++++++++++
<< >  I'm looking for a book on HF antenna theory and design.
 >  Preferrably advanced level, mathematical analytical or numerical
 >  modelling OK.  Thanks in advance.

 I think the text by Kraus (Antennas) used to be considered the definitive
 work in engineering schools. For the basics, he also wrote a text
 entitled "Electromagnetics".
  >>



From [e-mail] Sat Dec 21 12:34:07 1996
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From: Doug Dornbos <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: broadcast band fm 5/8
Date: Fri, 20 Dec 1996 16:04:15 -0400
Organization: The DataXchange Network, Inc
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Hello all.  I am not a Ham radio operator but antenna design really
intrigues me and I don't know who to ask but you guys.  I've been
reading the 5/8 wavelength discussion as it comes and goes in this
newsgroup and am bracing myself even now for answers to my questions.

I have considered why a 5/8 wavelength mobile antenna wouldn't make a
good choice for the FM broadcast band reception (88-108 Mhz).  It could
be made for the 5/8-wavelength to occur at 108 and be somewhat shorter
(but above half-wave) at 88 Mhz OR could be optimized for any given
portion of the band.  The spread of the band is only approx. 20% of
center frequency which doesn't seem awfully wide to me.

Does anyone know why this isn't commercially done?

Thanks for any insight you might have.

Happy Holidays.
Doug Dornbos


From [e-mail] Sat Dec 21 12:34:08 1996
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From: [e-mail] (Bea and Marvin Jones)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: broadcast band fm 5/8
Date: 21 Dec 1996 00:46:08 GMT
Organization: Rocky Mountain Internet - (800) 900-RMII
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Doug Dornbos ([e-mail]) wrote:
<-snip->

: Does anyone know why this isn't commercially done?

The short answer is: $

A longer answer would involve polarization...

73
Jonesy W3DHJ
--
Marvin Jones  [e-mail]
Gunnison, Colorado


From [e-mail] Sat Dec 21 12:34:09 1996
From: [e-mail]
Subject: Butternut HF5B "Butterfly"
Newsgroups: rec.radio.amateur.antenna
X-User-Info: 194.243.59.39 194.243.59.39
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Hello !

I use a Butternut HF5B antenna and i would like to exchange
impressions about using and performance.
If you are interested to , please, send me your message !
Thanks to everybody!

Best '73 , IK6ZKI , Enzo.


From [e-mail] Sat Dec 21 12:34:09 1996
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From: "Ronald D. Lucier" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Butternut HF5B "Butterfly"
Date: Mon, 16 Dec 1996 12:04:09 -0800
Organization: Optical Hybrids, Inc.
Lines: 18
Message-ID: <[e-mail]>
References: <32b077ee.0@206.103.128.3>
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[e-mail] wrote:
>
> Hello !
>
> I use a Butternut HF5B antenna and i would like to exchange
> impressions about using and performance.
> If you are interested to , please, send me your message !
> Thanks to everybody!
>
> Best '73 , IK6ZKI , Enzo.

I find the antenna tough to keep tuned due to the weather we have in New
England (snow, ice, rain).  Also, I think this is more a bi-directional
antenna as I cannot seem to get any front to back rejection no matter how
it is tuned.  Overall I am not impressed with the construction or
performance.

73 de WA1UWZ


From [e-mail] Sat Dec 21 12:34:10 1996
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From: [e-mail] (Dan K6MHE)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Butternut Vertical Maintainence                             N
Date: Wed, 18 Dec 1996 17:58:22 GMT
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On 14 Dec 96 22:03:00 GMT, [e-mail]
(Roland Stiner) wrote:

>
>A>After 5 years of use I want to clean up my HF6 and move it from a
> >ground mount to a mast mount.  2 questions:
> >1. Some of the joints where the tubing telescopes is seized, cant even
> >twist them.  How can I get these sections apart to clean up without
> >ruining them?
>

I have had good luck heating the joint with a propane torch then pull
while twisting the connection.

73 Danny, K6MHE


From [e-mail] Sat Dec 21 12:34:11 1996
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From: [e-mail] (Donald Milner)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: C-3 or KT34A
Date: Mon, 09 Dec 1996 12:57:26 GMT
Organization: The South African Internet Exchange.
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In one word NO
73 .. Don .. ZS6AQS

[e-mail] (Doug Shock) wrote:

>Can anyone provide any feedback on the C-3 compared to the KT34A. Is it
>worth getting rid of a KT34A for a C-3?
>--
>73 de                          "Its not who asked the question but
>AA0UF/Doug                      what the question was that counts."
>                              ______________________________________
>




From [e-mail] Sat Dec 21 12:34:12 1996
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From: [e-mail] (David Stockton)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: CHEAP RF ABSORBER?
Date: 12 Dec 1996 13:00:43 GMT
Organization: Hwelett Packard
Lines: 21
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[e-mail] wrote:

: Anyone know of cheap anechoic material that could be used in a home range?
: Should be opaque from 500-1500 Megs.Water-based stuff ok.
: Chip N1IR



        Would free be cheap enough?   You should find the ferrite
materials used in TV line-output transformers and deflection yokes, also
scrap switch-mode PSU transformers and chokes, also AM radio ferrite rod
antennae to be good and lossy in this region. It all comes down to
labour!, collect a lot, smash it up, and start experimenting. You could
try DIY plastic recycling as a base to mix the stuff in...


    Oooh,  I might just have invented a whole new recycling industry !


   Cheers
          David


From [e-mail] Sat Dec 21 12:34:13 1996
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From: [e-mail] (Fractenna)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: CHEAP RF ABSORBER?
Date: 12 Dec 1996 19:54:45 GMT
Organization: AOL http://www.aol.com
Lines: 8
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References: <[e-mail]>
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Hi Dave--

I hear you; what--specifically-- can you recommend for 900 MHz absorbers?

Believe me, ferrite was the first I tried.

73
Chip N1IR


From [e-mail] Sat Dec 21 12:34:14 1996
Path: news1.epix.net!news3.epix.net!uunet!in3.uu.net!128.255.40.11!news.uiowa.edu!news
From: "William E. Sabin" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: CHEAP RF ABSORBER?
Date: Thu, 12 Dec 1996 08:44:58 -0800
Organization: none
Lines: 17
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
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David Stockton wrote:
>
> [e-mail] wrote:
>
> : Anyone know of cheap anechoic material that could be used in a home range?
> : Should be opaque from 500-1500 Megs.Water-based stuff ok.
> : Chip N1IR
>
> It all comes down to
> labour!, collect a lot, smash it up, and start experimenting. You could
> try DIY plastic recycling as a base to mix the stuff in...
>


Don't breathe the dust.  Bad news. Your personal mu could go sky high.

Bill W0IYH


From [e-mail] Sat Dec 21 12:34:15 1996
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From: [e-mail] (Roy Lewallen)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: CHEAP RF ABSORBER?
Date: Fri, 13 Dec 96 09:24:11 GMT
Organization: EZNEC Antenna Software
Lines: 10
Message-ID: <58r7cv$[e-mail]>
References: <[e-mail]> <[e-mail]>
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X-Newsreader: News Xpress Version 1.0 Beta #3

I'm not sure what price range you're looking in or how large an area you
have to cover. I took a tour of a local facility about a year ago and they
had a room lined with absorbing curtains -- a flexible material (containing
ferrite I'm sure, and perhaps other materials). I don't recall the numbers
they told me, but I remember being impressed with the both the low cost and
reasonable attenuation. (Seems like the cost was on the order of $10k for a
room.) If this is within the boundaries of what you're looking for, I
might be able to track the manufacturer down.

Roy Lewallen, W7EL


From [e-mail] Sat Dec 21 12:34:16 1996
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From: [e-mail] (Fractenna)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: CHEAP RF ABSORBER?
Date: 14 Dec 1996 02:35:59 GMT
Organization: AOL http://www.aol.com
Lines: 19
Message-ID: <[e-mail]>
References: <58r7cv$[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
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Thanks Roy; for the moment just want to get reflection down 15-20 dB from
main path. Those guys want 40++dB attenuation typically. Drool.

Right now I'm talkin--cheap. A colleague suggested  (gulp!) potatoes which
work surprisingly well! [NOTE: This is NOT my idea.] :-) They're water-
based so they probably reflect as much as they absorb at a Gig, but their
radar cross section is small so  that the reflections are minor glints.
Have placed them on floor in spots where highlights noted. Reasonably
happy with success, but wanted to see if there were other suggestions
before I gave everyone a cheap laff.

The cost is zero because the spuds are mashed and garliced after their
chamber torture.

And the cost? Small potatoes.

I couldn't resist..H I.

Chip N1IR


From [e-mail] Sat Dec 21 12:34:18 1996
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From: Murray Kelly <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: CHEAP RF ABSORBER?
Date: Sat, 14 Dec 1996 18:47:44 +1000
Organization: M P Kelly (Med) P/L
Lines: 30
Message-ID: <[e-mail]>
References: <58r7cv$[e-mail]> <[e-mail]>
Reply-To: [e-mail]
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Fractenna wrote:
>
> Thanks Roy; for the moment just want to get reflection down 15-20 dB from
> main path. Those guys want 40++dB attenuation typically. Drool.
>
> Right now I'm talkin--cheap. A colleague suggested  (gulp!) potatoes which
> work surprisingly well! [NOTE: This is NOT my idea.] :-) They're water-
> based so they probably reflect as much as they absorb at a Gig, but their
> radar cross section is small so  that the reflections are minor glints.
> Have placed them on floor in spots where highlights noted. Reasonably
> happy with success, but wanted to see if there were other suggestions
> before I gave everyone a cheap laff.
>
> The cost is zero because the spuds are mashed and garliced after their
> chamber torture.
>
> And the cost? Small potatoes.
>
> I couldn't resist..H I.
>
> Chip N1IR

Try some of those magnetic refrigerator 'stickies'. They are loaded
with ferrite - and nice and cheap.

******************************************************************
*      Murray Kelly vk4aok      [e-mail]     *
*      29 Molonga Ter. / Graceville/ QLD. 4075/ Australia        *
*      ph/fax Intl+ 61 7 3379 3307  mobile [phone]           *
******************************************************************


From [e-mail] Sat Dec 21 12:34:19 1996
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From: [e-mail] (David Stockton)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: CHEAP RF ABSORBER?
Date: 20 Dec 1996 12:28:07 GMT
Organization: Hwelett Packard
Lines: 29
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
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Fractenna ([e-mail]) wrote:
: Hi Dave--
: I hear you; what--specifically-- can you recommend for 900 MHz absorbers?
: Believe me, ferrite was the first I tried.


    Most common ferrites have got very lossy by 900 MHz, so junked SMPS
and TV stuff is usable if broken into pieces and spread with the right
density, in a neutral binder, to get a reasonable approximation to the
impedence of your wave in space.

  Just trying a lump of solid ferrite may not work as well. It may look
resistive to an incident wave but if not the right Z per square, then
you'll get reflection.

   Bill's right about the dust. To keep your relative permeability down
wear a mask and goggles (for the shrapnel). Imagining the faces of
selected people in the patterns formed can be very theraputic as you
swing that 7 lb hammer...

    You just have to experiment with density. If I ever have another go,
I think I'll try making ferrite loaded concrete.

    Cheers
          David

    (just imagined potato-loaded concrete......)




From [e-mail] Sat Dec 21 12:34:20 1996
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From: [e-mail] (Bad  Dog)
Newsgroups: alt.radio.scanner,rec.radio.scanner,rec.radio.amateur.antenna
Subject: Re: Cordless Phone Question
Date: 11 Dec 1996 15:30:02 GMT
Organization: Radiowave Connection
Lines: 36
Message-ID: <58mk1q$[e-mail]>
References: <[e-mail]> <58fken$[e-mail]>
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In article <58fken$[e-mail]>, [e-mail]
says...
>
>[e-mail] wrote:
>
>>I just recently purchased a 25-chanel cordless phone and was wondering
>>how to increase its range.  I was thinking a longer antenna on the base
>>unit (It only has a short stubby one now).
>
>>Any suggestions?
>
>Well, you need to be aware of a few things first.  If this phone isn't
>scrambled or protected by some means, you may want to consider
>increasing the range.  Also, you need to consider what band the phone
>is on.  If the base has a "stubby" antenna, then there's a good chance
>it's a 900MHz phone.  In the even that it's a 46MHz phone, then I know
>Copper Electronics sells about an 8 foot external antenna to extend
>cordless phones for about $30.. and you just stick an alligator clip
>on the ant.  connection at the base.
>
>
 to whom it may concern,

46/49 Mhz phones are no good. the thought of trying to get more range is
like asking the kid with a scanner 5 blocks away if he can hear you, hehe
I receive them on my scanner from over a mile away and you wonder why the
phone itself can't go far out in the yard, well they were built by federal
specs to only transmit so far but the base can be heard for over a mile. I
think the feds weren't smart because every kid knows to listen to the
nieghbors and extendimg the range on your phone will only let his friends
down the street listen. so I would go to a Digital 900 Mhz phone, they have
the best clarity and range, I drive to the store and back home while talking
on mine and the best part is the kids can't here it on the scanner because
of the digital signal it produces but be aware the feds have ways to uncode
the security of anything.



From [e-mail] Sat Dec 21 12:34:21 1996
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From: [e-mail] (Brian J. Rueger)
Newsgroups: alt.radio.scanner,rec.radio.scanner,rec.radio.amateur.antenna
Subject: Re: Cordless Phone Question
Date: Wed, 11 Dec 1996 19:58:53 GMT
Organization: Retired USAF MSgt 49199
Lines: 31
Message-ID: <[e-mail]>
References: <[e-mail]> <58fken$[e-mail]> <58mk1q$[e-mail]>
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[e-mail] (Bad  Dog) pounded on the keyboard and wrote:

>>46/49 Mhz phones are no good. the thought of trying to get more range is
>like asking the kid with a scanner 5 blocks away if he can hear you, hehe
>I receive them on my scanner from over a mile away and you wonder why the
>phone itself can't go far out in the yard, well they were built by federal
>specs to only transmit so far but the base can be heard for over a mile. I
>think the feds weren't smart because every kid knows to listen to the
>nieghbors and extendimg the range on your phone will only let his friends
>down the street listen. so I would go to a Digital 900 Mhz phone, they have
>the best clarity and range, I drive to the store and back home while talking
>on mine and the best part is the kids can't here it on the scanner because
>of the digital signal it produces but be aware the feds have ways to uncode
>the security of anything.

Your opinion is that 46/49 Mhz phones are "no good."  The may not be great,
but compared to 10 years ago, they are excellent.  True they don't have the
range of a 900mhz phone but most people only need 200-300' at the most. I
would be interested in know how far you go when you are using your 900mhz
phone and drive to the store.

BR

--
------------------------------------------------------------------------------
Brian J. Rueger       |  Hampton Div. of Fire & Rescue    |  "Who dares wins"
Lieutenant/Paramedic  |  EMS-3 (Station-10)               |   Hampton, Virgini
a
B.S. Comm/I/SEL Pilot |  MSgt, USAF (Ret.) 49199          |   NREMT-P

             "Is it o.k. to yell "movie" in a crowded firehouse?"
------------------------------------------------------------------------------



From [e-mail] Sat Dec 21 12:34:23 1996
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From: [e-mail] (Brian J. Rueger)
Newsgroups: alt.radio.scanner,rec.radio.scanner,rec.radio.amateur.antenna
Subject: Re: Cordless Phone Question
Date: Wed, 11 Dec 1996 19:54:06 GMT
Organization: Retired USAF MSgt 49199
Lines: 31
Message-ID: <[e-mail]>
References: <[e-mail]> <58fken$[e-mail]> <58mk1q$[e-mail]>
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[e-mail] (Bad  Dog) pounded on the keyboard and wrote:

>>46/49 Mhz phones are no good. the thought of trying to get more range is
>like asking the kid with a scanner 5 blocks away if he can hear you, hehe
>I receive them on my scanner from over a mile away and you wonder why the
>phone itself can't go far out in the yard, well they were built by federal
>specs to only transmit so far but the base can be heard for over a mile. I
>think the feds weren't smart because every kid knows to listen to the
>nieghbors and extendimg the range on your phone will only let his friends
>down the street listen. so I would go to a Digital 900 Mhz phone, they have
>the best clarity and range, I drive to the store and back home while talking
>on mine and the best part is the kids can't here it on the scanner because
>of the digital signal it produces but be aware the feds have ways to uncode
>the security of anything.

Your opinion is that 46/49 Mhz phones are "no good."  The may not be great,
but compaired to 10 years ago, they are excellent.  True they don't have the
range of a 900mhz phone but most people only need 200-300' at the most. I
would be interested in know how far you go when you are using your 900mhz
phone and drive to the store.

BR

--
------------------------------------------------------------------------------
Brian J. Rueger       |  Hampton Div. of Fire & Rescue    |  "Who dares wins"
Lieutenant/Paramedic  |  EMS-3 (Station-10)               |   Hampton, Virgini
a
B.S. Comm/I/SEL Pilot |  MSgt, USAF (Ret.) 49199          |   NREMT-P

             "Is it o.k. to yell "movie" in a crowded firehouse?"
------------------------------------------------------------------------------



From [e-mail] Sat Dec 21 12:34:24 1996
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From: [e-mail] (Darwin Teague)
Newsgroups: alt.radio.scanner,rec.radio.scanner,rec.radio.amateur.antenna
Subject: Re: Cordless Phone Question
Date: Thu, 12 Dec 96 10:48:46 GMT
Organization: IndyNet - Indys Internet Gateway
Lines: 15
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References: <[e-mail]>
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In article <[e-mail]>, [e-mail] wrote:
>I just recently purchased a 25-chanel cordless phone and was wondering
>how to increase its range.  I was thinking a longer antenna on the base
>unit (It only has a short stubby one now).
>
>Any suggestions?
>
>Andrew
Is there someone that lives more than 1/2 a mile from you that you want to be
able to hear your calls? It'd be easier for THEM to put up an outside antenna.


Seriously, the power level is so low, you'd be getting signal loss from the
coax running to the antenna. I suppose you could make an antenna matched to
the freq. Use speaker wire and it should be about 5 feet long.


From [e-mail] Sat Dec 21 12:34:24 1996
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From: [e-mail] (Lil Mac)
Newsgroups: alt.radio.scanner,rec.radio.scanner,rec.radio.amateur.antenna
Subject: Re: Cordless Phone Question
Date: Sun, 15 Dec 1996 22:39:22 GMT
Organization: none
Lines: 15
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Why would you want to do that? It would just make it easier for a
scanner further away to receive it.

>[e-mail] wrote:
>>I just recently purchased a 25-chanel cordless phone and was wondering
>>how to increase its range.  I was thinking a longer antenna on the base
>>unit (It only has a short stubby one now).
>>
>>Any suggestions?
>>
>>Andrew
>I'll look it up but there is an outside dipole antenna-for transmitting
>by a co. in TX I believe, I try to dig up the catalog in my closet
>



From [e-mail] Sat Dec 21 12:34:25 1996
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From: Michael Perry <[e-mail]>
Newsgroups: alt.radio.scanner,rec.radio.scanner,rec.radio.amateur.antenna
Subject: Re: Cordless Phone Question
Date: 16 Dec 1996 03:49:51 GMT
Organization: AT&T WorldNet Services
Lines: 18
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[e-mail] (Lil Mac) wrote:
>Why would you want to do that? It would just make it easier for a
>scanner further away to receive it.
>
>>[e-mail] wrote:
>>>I just recently purchased a 25-chanel cordless phone and was wondering
>>>how to increase its range.  I was thinking a longer antenna on the base
>>>unit (It only has a short stubby one now).
>>>
>>>Any suggestions?
>>>
>>>Andrew
>>I'll look it up but there is an outside dipole antenna-for transmitting
>>by a co. in TX I believe, I try to dig up the catalog in my closet
>>
>  Ahhh it popped in my head.  The com. name is VALOR and specializes in a lot
 of CB accessories and ants.




From [e-mail] Sat Dec 21 12:34:26 1996
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From: [e-mail] (Nafana)
Newsgroups: alt.radio.scanner,rec.radio.scanner,rec.radio.amateur.antenna
Subject: Re: Cordless Phone Question
Date: 19 Dec 1996 10:39:09 GMT
Organization: Nafana Research Associates
Lines: 18
Message-ID: <59b60e$[e-mail]>
References: <[e-mail]> <58onj0$[e-mail]>
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>In article <[e-mail]>, [e-mail] wrote:
>I just recently purchased a 25-chanel cordless phone and was wondering
>how to increase its range.  I was thinking a longer antenna on the base
>unit (It only has a short stubby one now).

>Any suggestions?

 Use a impedance matching network to drive a 4CX250 ceramic tube. Use
that to drive a 4CX15000C.  (You'll need about 4 amps at 7.5KV).   Come
out of that with a Pi-net to a 4" 50-ohm heliax coax.  Run this up a tower
as high as you can get it- (at least 500-ft) to a 12 bay phased diapole array.

This should give you about 75 miles.

 Glad to help.

 -Naf




From [e-mail] Sat Dec 21 12:34:27 1996
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From: Dennis Breeden <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Coupling external antenna to AM radio
Date: Wed, 11 Dec 1996 23:13:22 -0600
Organization: Reuter
Lines: 17
Message-ID: <[e-mail]>
References: <57ia94$[e-mail]>
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Dan Walker wrote:
>
> I want to connect an external antenna to an AM radio that has an
> internal ferrite rod antenna. I saw a 'magnetic coupling device'
> advertised that sticks to the back of the radio case and converts a
> coax signal to the internal antenna.
>
> Does anyone have a circuit for this?
>
> Sounds similar to a through-the-glass type of antenna mount.
>
> Thanks de KE6LBXI don't know the size of the radioyou are using.  If it is a
 small
hand held battery, you can wrap several turns of wire from the antenna
around the radio and ground the other end.  If you are using a car
radio, just plug it into the antenna jack and adjust the antenna
trimmer (if equiped).  Boombox and and larger may also have an external
antenna jack.  Good luck        D. Pat Breeden  WB3KUM/9


From [e-mail] Sat Dec 21 12:34:28 1996
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From: [e-mail] (Ki5gf)
Newsgroups: rec.radio.amateur.antenna
Subject: CU-1208/URC-51 Antenna Coupler info needed
Date: 18 Dec 1996 16:39:57 GMT
Organization: AOL http://www.aol.com
Lines: 15
Message-ID: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

I recently acquired a new (Never used) remote-controllable antenna
coupler/tuner/dummy load made by Hammarlund for the US Coast Guard.
I would like to find anyone who might have a manual or other documentation
on this coupler. The ID tag on this coupler has the following info:

CU-1208/URC-51
Coupler, Antenna
A unit of radio set AN/URC-51
Manuf for US Coast Guard by Hammarlund MFG CO
Mars Hill, NC
Contract TCG-57266-A

Any ideas on where to acquire documentation would also be appreciated.
TNX Merry Xmas, Steve



From [e-mail] Sat Dec 21 12:34:29 1996
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From: "David" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Cushcraft 20meter monoband for sale
Date: 16 Dec 1996 22:34:45 GMT
Organization: Florida Internet Corp
Lines: 7
Message-ID: <01bbeba1$6d78dcc0$2ada66ce@PHOCHIEF>
NNTP-Posting-Host: jensen42.flinet.com
X-Newsreader: Microsoft Internet News 4.70.1155

Cushcraft 20 meter 4-element monoband for sale.  10db Forward gain, 30+ F/B

Must pick up from my Port St. Lucie, Florida home.

$90.00

Email: [e-mail]


From [e-mail] Sat Dec 21 12:34:31 1996
Newsgroups: rec.radio.amateur.antenna
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From: [e-mail] (Eric S. Hvozda)
Subject: Diamond SG7900 mounting suggestions?
Message-ID: <[e-mail]>
Summary: mount antenna truck tonneau cover
Organization: NETCOM On-line Communication Services (408 261-4700 guest)
Date: Thu, 19 Dec 1996 04:12:34 GMT
Lines: 20
Sender: [e-mail]


I'm looking to put a 2m/70cm mobile in my Toyota 4x4 truck.

I have a problem tho.  I'd really like to put the Diamond SG7900 on,
(it's a 7/8 wave [ie ~62 inches tall]).  However, I am concerned
about the height factor (ie will I clear most under passes?
the roof is 6th now); so I have doubts about a roof mount.

Far as a bed mount, I have no stake holes in my bed plus I have a
tonneau cover.

What about a rear bumper mount?  On one of the sides?  Will it be
strong enough to support the weight?  What about wind?  Will I need
guy lines to keep this rig erect at 65MPH?

Sorry for all the questions, but this group seems like a decent
place to start.  73s!
--
Ack!
Creek, not creek; Pop not soda; Car needs washed; Gumband...


From [e-mail] Sat Dec 21 12:34:32 1996
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From: [e-mail] (Dick Flanagan)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Diamond SG7900 mounting suggestions?
Date: Thu, 19 Dec 1996 19:28:09 -0800
Organization: Libelle Productions, Inc., Minden, Nevada USA
Lines: 17
Distribution: world
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In article <[e-mail]>, [e-mail] (Eric S.
Hvozda) wrote:

>I'm looking to put a 2m/70cm mobile in my Toyota 4x4 truck.
>
>I have a problem tho.  I'd really like to put the Diamond SG7900 on,
>(it's a 7/8 wave [ie ~62 inches tall]).  However, I am concerned
>about the height factor (ie will I clear most under passes?
>the roof is 6th now); so I have doubts about a roof mount.

I often mount an SG7900 on the gutter of my F-150 with no problems.  I
figure anything under 12 ft will be okay.  If I come to an overpass marked
for anything less than 11 ft, I just reach up and tilt the antenna down
until I'm on the other side.  Tree branches, though, are a lot more
dangerous since they seldom come with height warnings.  :)
--
Dick Flanagan W6OLD CFII Minden, Nevada


From [e-mail] Sat Dec 21 12:34:33 1996
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From: [e-mail] (Craig Haggart, Accelerator Ops)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Diamond SG7900 mounting suggestions?
Date: 19 Dec 96 22:38:37 -0800
Organization: SSRL, Stanford Synchrotron Radiation Lab
Lines: 26
Message-ID: <1996Dec19.223837.1@ssrl01>
References: <[e-mail]>
NNTP-Posting-Host: ssrl01.slac.stanford.edu

From Eric S. Hvozda ([e-mail]):

   > I'm looking to put a [Diamond SG7900] 2m/70cm mobile in my
   > Toyota 4x4 truck.   ...However, I am concerned about the
   > height factor ... What about a rear bumper mount?  On one of
   > the sides?

I presume you're interested in that Diamond due to its high gain, but
if you haven't already bought it you might consider a shorter antenna
with slightly less gain that you can easily mount on the cab.

Mounting the antenna on the back bumper may end up negating the higher
gain -- it will be obscured by the metal truck body in some directions,
and the longer cable run might have just enough loss to offset the
advantage over a different antenna with slightly lower gain.

If you figure out a good way to do, though, by all means share it with
the group!  I had the same dilemma when I was looking for an antenna
for my station wagon.  I ended up getting the somewhat shorter
Cushcraft dual-bander -- and I've had problems in some parking garages
with that one.

--
-Craig Haggart, KC6VHO
 [e-mail]



From [e-mail] Sat Dec 21 12:34:34 1996
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From: [e-mail] (Mike Del Pozzo)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Difference between mobile and regular antennas?
Date: Wed, 18 Dec 1996 06:15:21 GMT
Organization: MindSpring Enterprises
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Message-ID: <597njs$[e-mail]>
References: <[e-mail]>
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"Brian C. Dolan" <[e-mail]> wrote:

>What makes a mobile antenna different from a regular (fixed base)
>antenna? What's required in order to use a mobile antenna in a fixed
>environment?

>Thanks....

>Brian
Hi Brian,
Um...... difference ?
OK ...
1 . Mobile antennas need greater loading to resonate -- base antennas
could be full size or less
2. more loading = less efficiency
3. same basic principles do apply however to how they work
de Mike
KR4TG




From [e-mail] Sat Dec 21 12:34:34 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Difference between mobile and regular antennas?
Date: Fri, 20 Dec 1996 01:35:05 GMT
Organization: Universite Laval
Lines: 24
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"Brian C. Dolan" <[e-mail]> wrote:

>What makes a mobile antenna different from a regular (fixed base)
>antenna? What's required in order to use a mobile antenna in a fixed
>environment?

On vhf your mobile vertical antenna can be equal or better than your
fixed vertical antenna

On hf your mobile antenna has
5%  efficiency on 80 meters
20 %      "        on 40 meters
 great over           20 meters , 15  10

Just get an amateur handbook from ARRL in order to get the picture

73 es good reading Sir.
from Ve2 land

>Thanks....

>Brian




From [e-mail] Sat Dec 21 12:34:36 1996
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From: [e-mail] (Dexter N. Muir)
Newsgroups: rec.radio.amateur.antenna
Subject: Digest: Missing issues
Date: 13 Dec 96 20:45:19 GMT
Organization: ucsd usenet gateway
Lines: 39
Message-ID: <[e-mail]>
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]


Greetings, all...

   There has been a hiccup in the Digest distribution, somewhere between my
provider (massey.ac.nz) and ucsd.edu, and I am missing the following Digests:

870
871
874 (scratch that, got it from archive...)
875
876
878
880, and
883

  between the 7th and the 13th December.  As far as I can tell, they are not
in the archive: the script only processes one Digest per day.  I archive
these for local Hams, and try my best to get them all... and one or two of
the current threads are of interest to me.  Has anyone trapped these, who
could email them to me (Mime attachments OK)?

   Brian does a sterling job of maintaining the distribution, but once in a
while someone else gets in there (Murphy? :-) and fouls things up. In a
personal email on one such occasion, he said he needed to break a few
fingers (look out, Murphy!), and he has my full permission: these hiccups
are occurring in other Digest distributions from ucsd.edu, too, and there
are probably others affected.

  Best wishes to all for the coming Festive season, and 73 de ZL3LH.

 --------------------------------------------------------------------------
| Dexter N. Muir          Manufacturing Pilot Plant Technician             |
| [e-mail]   Department of Production Technology              |
|                         Massey University, Palmerston North, New Zealand |
| http://www.massey.ac.nz/~DNMuir/                                         |
| "Honesty pays --- but not enough."   "Modesty pays --- but even less!! " |
 --------------------------------------------------------------------------




From [e-mail] Sat Dec 21 12:34:37 1996
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From: [e-mail] (Dave Michelson)
Newsgroups: rec.radio.amateur.digital.misc,rec.radio.amateur.antenna
Subject: DIN 7/16 ?
Date: 16 Dec 1996 09:41:59 -0800
Organization: University of BC, Dept. of Electrical Engineering
Lines: 20
Message-ID: <5941l7$[e-mail]>
NNTP-Posting-Host: dns.ee.ubc.ca
Xref: news1.epix.net rec.radio.amateur.digital.misc:20728 rec.radio.amateur.antenna:32783

A few questions concerning PCS antennas:

1. I've noticed that many PCS antennas are equipped with DIN 7/16 rather
   than N connectors.  Why?

2. I've also noticed that many PCS antenna specifications now include an
   intermod spec.  Is this spec as measured off the assembly line or
   at the end of service?  (It seems to me that any antenna will exhibit
   good intermod specs when it's brand new and that performance after
   exposure to weather is the distinguishing factor.  Or have I missed
   something?)

3. What is the preferred method for measuring PCS antenna intermod
   characteristics?

Any thoughts or insights would be appreciated.

--
Dave Michelson                             University of British Columbia
[e-mail]                         Department of Electrical Engineering


From [e-mail] Sat Dec 21 12:34:38 1996
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From: [e-mail] (Ron Cole)
Newsgroups: rec.radio.amateur.digital.misc,rec.radio.amateur.antenna
Subject: Re: DIN 7/16 ?
Date: Wed, 18 Dec 1996 01:05:02 GMT
Organization: MindSpring Enterprises, Inc.
Lines: 31
Message-ID: <597jf5$[e-mail]>
References: <5941l7$[e-mail]>
Reply-To: [e-mail]
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Xref: news1.epix.net rec.radio.amateur.digital.misc:20746 rec.radio.amateur.antenna:32866

[e-mail] (Dave Michelson) wrote:

>A few questions concerning PCS antennas:

>1. I've noticed that many PCS antennas are equipped with DIN 7/16 rather
>   than N connectors.  Why?

>2. I've also noticed that many PCS antenna specifications now include an
>   intermod spec.  Is this spec as measured off the assembly line or
>   at the end of service?  (It seems to me that any antenna will exhibit
>   good intermod specs when it's brand new and that performance after
>   exposure to weather is the distinguishing factor.  Or have I missed
>   something?)

>3. What is the preferred method for measuring PCS antenna intermod
>   characteristics?

>Any thoughts or insights would be appreciated.

The 7/16 DIN is suposed to have a lower loss than an N connector.  I
have not seen any evidenace but thats the story,
Oh, It will handle more power but thats a moot point at 1850 to 1990
Mhz.  Its interesting to note that the N connector is use used inside
the Base station and the DIN is used outside.

I cannot help you with the Intermod ratings, I will have to look into
that tomorrow and see what the antennas we are using are rated at.

Ron Cole
N5HYH



From [e-mail] Sat Dec 21 12:34:39 1996
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From: [e-mail] (King Kamehameha)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Direction finding antenna
Date: Fri, 13 Dec 96 02:47:42 GMT
Organization: The Wholly Organised Society For The Study Of Lamprey Morality, Pty., Ltd.
Lines: 32
Distribution: world
Message-ID: <58qrdk$[e-mail]>
References: <01bbe7a3$7fa92e60$[e-mail]>
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X-Newsreader: News Xpress Version 1.0 Beta #4

In article <01bbe7a3$7fa92e60$[e-mail]>,
   "Scott Winton" <[e-mail]> wrote:
>I was wondering if anyone has built or has plans to build a direction
>finding antenna. It will be connected to a 2m vhf mobile radio. I'm able to
>get my hands on some aviation equipment and was wondering if a automatic
>direction finding (ADF) antenna and the in cockpit ADF gauge could be used.
>
>Thanks Scott
>
>email [e-mail]

Most people who T-hunt in So. California use 3-5 element Yagis or quads. This
coupled with an attenuator to knock down the signal when getting close to the
"T."

Might I recommend the book, "Transmitter Hunting: Radio Direction Finding
Simplified" by Joe Moell and Tom Curlee? It has a LOT of information on
direction finding equipment and techniques. The copy I have is the sixth
printing, ISBN 0-8306-2702-4, but I think they changed publishing houses some
time ago. Email Joe at [e-mail] for current information.

7 3 de KE6ALM
Matt
--


   #########################################
   # This side of the .sig has # Reply to: #
   # no technical content      # ke6alm    #
   # get.lost.stinkin.spammers.#[e-mail] #
   #########################################



From [e-mail] Sat Dec 21 12:34:40 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Direction finding antenna
Date: 13 Dec 1996 08:58:03 GMT
Organization: TELTEC-TCD, IRELAND
Lines: 17
Distribution: world
Message-ID: <58r5qr$[e-mail]>
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X-Newsreader: <WinQVT/Net v3.9>

In article <01bbe7a3$7fa92e60$[e-mail]>, "Scott Winton"
<[e-mail]> writes:

>I was wondering if anyone has built or has plans to build a direction
>finding antenna. It will be connected to a 2m vhf mobile radio. I'm able to
>get my hands on some aviation equipment and was wondering if a automatic
>direction finding (ADF) antenna and the in cockpit ADF gauge could be used.
>
>Thanks Scott
>
>email [e-mail]

Aircraft ADF (usually) works in the 300-1000 kHz band.  The antennas are
loops, often with ferrite cores.  These antennas would be fundamentally
unsuitable for 2 metres.

Gerry


From [e-mail] Sat Dec 21 12:34:41 1996
Path: news1.epix.net!news3.epix.net!uunet!in1.uu.net!204.71.1.48!newsfeed.internetmci.com!malgudi.oar.net!hyperion.wright.edu!alpha.wright.edu!alpha.wright.edu!s004cnm
From: CHRISTOPHER MCCALL <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Dorm room antenna
Date: Wed, 11 Dec 1996 11:59:16 -0500
Organization: Wright State University
Lines: 15
Message-ID: <[e-mail]>
References: <58acbh$[e-mail]> <[e-mail]>
NNTP-Posting-Host: alpha.wright.edu
Mime-Version: 1.0
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X-Sender: [e-mail]
In-Reply-To: <[e-mail]>

        Tim, my friends and I have had luck with the MFJ portable antenna.
Model MFJ-1621. It has a 58 inch whip, inside is a killer load/tuning
coil. I couldn't tell you the effiecency but it works. I'd aim at under
100 watts, we'd tear the heck out of the neighbors surround sound on his
cheap, poorly shielded personal entertainment center. If you have 10ft
ceilings you might try a design from W1BUM's Antenna Notebook. The title
is right I might have botched the call. Anyhow the design goes something
like this: go five feet out from feed point( use a balun to reduce RFI)
then drop down 9 ft at the end you have your load coils, use the good old
aligator clip to choose your load. since this a folded dipole, you'd
repeat on the other side. The other option is go QRP, you'd be amazed at
how far you really can go. Besides you won't tear up all that cheap junk
electronics that college students tend to buy, and is in close vicinity.
        73 de KB8YPO Chris



From [e-mail] Sat Dec 21 12:34:42 1996
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From: aor <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Dorm room antenna,  Fun with an Xacto knife....
Date: Wed, 11 Dec 1996 22:16:31 -0500
Organization: gteais-org
Lines: 18
Message-ID: <[e-mail]>
References: <58acbh$[e-mail]>
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To: Lab User <[e-mail]>

Tim,

I pulled your callsign and see that you are a Tech, so I think that you
are looking into VHF/UHF antennas.

To make a 2 meter or 440 antenna, use alarm foil from radio shack.  Make
a ground plane, diplole, fan diplole, full wave loop, delta loop,...
etc. all on the glass window.   Foil is cheap (100' rolls)!  They also
sell stick-on mounts (center conductor on one screw, the shieldon the
other.  This also allows a coil or cap (a tuner!) to be mounted at this
point.    It also cleans up with a razor.  Besure to remove ant metal
screen.  Replace it with nylon....  They will never know... he he he

Forgive my assumption on VHF/UHF only.  HF would be another discussion.

Have a blast in Payne Hall!
Al, NW2M
http://www.dsport.com/marc/


From [e-mail] Sat Dec 21 12:34:43 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: DXER.COM Website Update
Date: Thu, 12 Dec 1996 05:58:29 GMT
Organization: A customer of Pacific Bell Internet Services
Lines: 29
Message-ID: <[e-mail]>
NNTP-Posting-Host: ppp-206-170-67-199.anhm01.pacbell.net
X-Newsreader: Forte Free Agent 1.1/32.230

Stop by and check out the additions to "dxer.com"
30 pages,over 400 links. Mew additions to 12 of the
indexes..Check out the BBS and leave your comments
or suggestions to improve the site to better serve the
amateur community..

CallBooks         (4)
Contest Calendar  (2)
DX Clubs          (3)
Ham Radio Clubs   (3)
Ham Radio Info    (3)
Logging Software  (3)
Manufacturers     (4)
Packet Radio      (5)
QRP               (6)
Propagation       (3)
Radio Mods        (2)
Satellites        (4)
SoCal Rptrs      (New)





If you have a site you would like to see added or a
subject covered, send us the URL and we will create a
new index. Radio related sites only

"http://www.dxer.com"


From [e-mail] Sat Dec 21 12:34:44 1996
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From: crs <[e-mail]>
Newsgroups: sci.physics,rec.radio,rec.radio.amateur.antenna
Subject: Re: Easy AM radio question
Date: Wed, 18 Dec 1996 06:24:36 +0100
Organization: What organization?
Lines: 40
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References: <[e-mail]>
Reply-To: [e-mail]
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Brian Zeiler wrote:
>
> I need a little help here from somebody who knows more than me (which
> is zero) about radios.  I listen to AM radio through a regular Sony
> amplifier/receiver component.  Problem is, I live pretty much in
> downtown Chicago, so between the buildings blocking signals and all
> the other radio noise, it's hard to get signals from WTMJ 620 AM in
> Milwaukee, about 90 miles to the North.  I'm a Milwaukee Bucks fan,
> and I'm pretty excited that we actually have a winning record (13-9!),
> so I'd like to listen to some games (especially the upcoming Laker
> game).
>
> So, my question is: what can I do to improve my AM reception?
[snip]

My first response is this:  I saw the Bucks beat the Celtics the other
night in Boston (no great accomplishment) - don't bother.  If that game
was a representative sample, the Bucks didn't play with any heart and
won't for the remainder of the season.

However, there's no accounting for taste so I'll try to answer your
question.  As I recall, 'TMJ sends out a directional signal.  If you are
not in the path, there's no hope of picking it up in Chicago.  Can you
get the signal in your car once you get out of the downtown area?  If
not, consider "da Bulls" (option B).  If you can pick the game up and
you still want to do so in your building, then you will need to put up
an antenna that goes as high as possible so that the surrounding
buildings are less likely to interfere.  Can you string a wire to the
top of your building?  If not, you might want to take a drive to
Evanston and listen in your car (Lakeshore Drive is nice this time of
year).  Also, aren't the Bucks broadcasts syndicated to other stations
in WI?  What about some (possibly non-directional) station in Racine or
Kenosha?

I probably wasn't much help because there really isn't much you can do
without spending some big bucks (no pun intended).  Take heart - there's
always option B.

Chuck Szmanda
[e-mail]


From [e-mail] Sat Dec 21 12:34:46 1996
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From: fiz <[e-mail]>
Newsgroups: sci.physics,rec.radio,rec.radio.amateur.antenna
Subject: Re: Easy AM radio question
Date: Wed, 18 Dec 1996 14:17:07 -0800
Organization: Me
Lines: 43
Message-ID: <[e-mail]>
References: <[e-mail]>
Reply-To: [e-mail]
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Brian Zeiler wrote:
>
> I need a little help here from somebody who knows more than me (which
> is zero) about radios.  I listen to AM radio through a regular Sony
> amplifier/receiver component.  Problem is, I live pretty much in
> downtown Chicago, so between the buildings blocking signals and all
> the other radio noise, it's hard to get signals from WTMJ 620 AM in
> Milwaukee, about 90 miles to the North.  I'm a Milwaukee Bucks fan,
> and I'm pretty excited that we actually have a winning record (13-9!),
> so I'd like to listen to some games (especially the upcoming Laker
> game).
>
> So, my question is: what can I do to improve my AM reception?  I have

[snipppppp]

Hi,

Let me start by saying I won't condone what I'm about to suggest, its
probably illegal, you decide. I've thought about doing this myself since
my lab is back in the corner of a U shaped steel structure building. The
only station (AM or FM) I can get comes in badly at best.

How about putting a small, very low power transmitter on the roof
(assuming you can receive the station on the roof) and tie it into a
receiver tuned to the game (also on the roof).  Before the game starts,
plant your 'station' on the roof, tune in the game in your living room
and remove the transmitter when the game is over. Of course, be sure to
find a frequency not in use locally or you might have some company.

I've even seen 'transmitters' sold for playing a CD player thru a car
stereo. Plug the CD into the transmitter and tune up the car radio to
the same frequency. I bet this could be used with the earphone output of
a small FM radio as well. I think the gizmos I'm thinking of cost about
$30.

I'm not sure what the 'legal' power limits are for FM transmitters with
no license, but I think you are allowed a good fraction of a watt. Then
there's the 'legality' of rebroadcasting the game to worry about, not to
mention the possibility of living next door to someone who doesn't share
your appreciation for the Bucks.

ttfn  fiz  (KG0YG)


From [e-mail] Sat Dec 21 12:34:47 1996
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From: [e-mail] (Steve Byan)
Newsgroups: sci.physics,rec.radio,rec.radio.amateur.antenna
Subject: Re: Easy AM radio question
Date: Wed, 18 Dec 1996 16:22:00 -0400
Organization: Hitachi Computer Products, Inc.
Lines: 19
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]> <[e-mail]>
NNTP-Posting-Host: brainiac.hi.com
Xref: news1.epix.net sci.physics:231413 rec.radio.amateur.antenna:32892

In article <[e-mail]>, [e-mail] wrote:

> Didn't work too well.  In fact, I can barely pick up the Chicago AM
> stations too well with my receiver, or even on my clock radio for that
> matter.  Reception here just sucks.

Sounds like you have major RFI noise problems. A larger antenna is
unlikely to help.

Try using a portable AM radio to sniff out noise sources in your
apartment. If you're lucky, the predominant noise source will be something
that you can control, i.e. cut the power to it when you want to listen to
the radio.

Regards,
-Steve

--
Steve Byan                                  internet: [e-mail]


From [e-mail] Sat Dec 21 12:34:49 1996
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From: [e-mail] (Steve Byan)
Newsgroups: sci.physics,rec.radio,rec.radio.amateur.antenna
Subject: Re: Easy AM radio question
Date: Wed, 18 Dec 1996 13:23:02 -0400
Organization: Hitachi Computer Products, Inc.
Lines: 33
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: brainiac.hi.com
Xref: news1.epix.net sci.physics:231436 rec.radio.amateur.antenna:32897

In article <[e-mail]>, [e-mail] wrote:

> the other radio noise, it's hard to get signals from WTMJ 620 AM in
> Milwaukee, about 90 miles to the North.  I'm a Milwaukee Bucks fan,
[snip]
> So, my question is: what can I do to improve my AM reception?  I have
> an AM radio antenna coil hooked up to the back, but it's just the
> little cheap antenna that came with the receiver.  Any suggestions?
> I'm not even getting a weak signal -- I'm getting nothing.

Try rotating your receiver. The ferrite loopstick antenna on your Sony
hi-fi receiver has two "nulls", more or less 180 degrees apart in azimuth,
where the antenna won't pick up much signal. If the direction from your
location to WTMJ is along the "null", you won't hear much.

Alternatively,  try a larger antenna, either by purchasing a
"Select-A-Tenna" and connecting it to your receiver, or by purchasing a
GE/Thompson Superradio III, which has a very large built-in ferrite loop
antenna.

> And the
> station is very strong, strong enough to receive when I'm on the
> highway in Chicago.

The typical car radio is far more sensitive than the typical Sony hi-fi
receiver. Also, you may well have much less RFI from consumer appliances
when on the highway than in your urban apartment.

Regards,
-Steve

--
Steve Byan                                  internet: [e-mail]


From [e-mail] Sat Dec 21 12:34:50 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!news.kei.com!news.mathworks.com!howland.erols.net!www.nntp.primenet.com!nntp.primenet.com!news.primenet.com!news.primenet.com!not-for-mail
From: [e-mail] (Brian Zeiler)
Newsgroups: sci.physics,rec.radio,rec.radio.amateur.antenna
Subject: Re: Easy AM radio question
Date: 18 Dec 1996 11:59:01 -0700
Organization: Project Sigma
Lines: 64
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
Reply-To: [e-mail]
X-Posted-By: @206.165.88.197 (bdzeiler)
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On Wed, 18 Dec 1996 06:24:36 +0100, crs <[e-mail]> wrote:

>Brian Zeiler wrote:
>>
>> I need a little help here from somebody who knows more than me (which
>> is zero) about radios.  I listen to AM radio through a regular Sony
>> amplifier/receiver component.  Problem is, I live pretty much in
>> downtown Chicago, so between the buildings blocking signals and all
>> the other radio noise, it's hard to get signals from WTMJ 620 AM in
>> Milwaukee, about 90 miles to the North.  I'm a Milwaukee Bucks fan,
>> and I'm pretty excited that we actually have a winning record (13-9!),
>> so I'd like to listen to some games (especially the upcoming Laker
>> game).
>>
>> So, my question is: what can I do to improve my AM reception?
>[snip]
>
>My first response is this:  I saw the Bucks beat the Celtics the other
>night in Boston (no great accomplishment) - don't bother.  If that game
>was a representative sample, the Bucks didn't play with any heart and
>won't for the remainder of the season.

Yeah, I guess they must have been bored having to beat the Celtics yet
again this year....

>However, there's no accounting for taste so I'll try to answer your
>question.  As I recall, 'TMJ sends out a directional signal.  If you are
>not in the path, there's no hope of picking it up in Chicago.  Can you
>get the signal in your car once you get out of the downtown area?

Yes, very well.

>If
>not, consider "da Bulls" (option B).

<shudder>

>If you can pick the game up and
>you still want to do so in your building, then you will need to put up
>an antenna that goes as high as possible so that the surrounding
>buildings are less likely to interfere.  Can you string a wire to the
>top of your building?

Hmmm.... I don't think that would be an easy task.  I'm on floor 6 of
18.

>If not, you might want to take a drive to
>Evanston and listen in your car (Lakeshore Drive is nice this time of
>year).  Also, aren't the Bucks broadcasts syndicated to other stations
>in WI?  What about some (possibly non-directional) station in Racine or
>Kenosha?

That's probably a good idea to try.


____________________________________________________________________________

                    Science, Logic, and the UFO Debate:
               http://www.primenet.com/~bdzeiler/index.html
                           -----------------------
"Form 8-R must be completed by persons listed in Item 9a of Form 7-R or Items
4a or 6a on Schedule D, and by all persons listed in Item 10 of Form 7-R and
by all persons applying for registration as an AP of a CPO or CTA."
                                        -- CFTC Regulatory Guide
____________________________________________________________________________


From [e-mail] Sat Dec 21 12:34:51 1996
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From: [e-mail] (Brian Zeiler)
Newsgroups: sci.physics,rec.radio,rec.radio.amateur.antenna
Subject: Re: Easy AM radio question
Date: 18 Dec 1996 12:07:02 -0700
Organization: Project Sigma
Lines: 26
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
Reply-To: [e-mail]
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On Wed, 18 Dec 1996 13:23:02 -0400, [e-mail] (Steve Byan) wrote:

>Try rotating your receiver. The ferrite loopstick antenna on your Sony
>hi-fi receiver has two "nulls", more or less 180 degrees apart in azimuth,
>where the antenna won't pick up much signal. If the direction from your
>location to WTMJ is along the "null", you won't hear much.

Didn't work too well.  In fact, I can barely pick up the Chicago AM
stations too well with my receiver, or even on my clock radio for that
matter.  Reception here just sucks.

>Alternatively,  try a larger antenna, either by purchasing a
>"Select-A-Tenna" and connecting it to your receiver, or by purchasing a
>GE/Thompson Superradio III, which has a very large built-in ferrite loop
>antenna.

I think I'll have to try that, thanks.
____________________________________________________________________________

                    Science, Logic, and the UFO Debate:
               http://www.primenet.com/~bdzeiler/index.html
                           -----------------------
"Form 8-R must be completed by persons listed in Item 9a of Form 7-R or Items
4a or 6a on Schedule D, and by all persons listed in Item 10 of Form 7-R and
by all persons applying for registration as an AP of a CPO or CTA."
                                        -- CFTC Regulatory Guide
____________________________________________________________________________


From [e-mail] Sat Dec 21 12:34:52 1996
Newsgroups: rec.radio.amateur.antenna
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!news.kei.com!newsfeed.internetmci.com!news.wildstar.net!newsfeed.direct.ca!nntp.portal.ca!news.bctel.net!news.mag-net.com!freenet.unbc.edu!news.scn.org!scn.org!bb840
From: [e-mail] (James Aeschliman)
Subject: Re: Easy AM radio question
Message-ID: <[e-mail]>
Sender: [e-mail]
Reply-To: [e-mail] (James Aeschliman)
Organization: Seattle Community Network
References: <[e-mail]>
Date: Wed, 18 Dec 1996 19:33:56 GMT
Lines: 16


In a previous article, [e-mail] (Brian Zeiler) says:

>So, my question is: what can I do to improve my AM reception?  I have
>an AM radio antenna coil hooked up to the back, but it's just the
>little cheap antenna that came with the receiver.  Any suggestions?
>I'm not even getting a weak signal -- I'm getting nothing.  And the
>station is very strong, strong enough to receive when I'm on the
>highway in Chicago.

Disconnect the coil antenna connected to the back of the receiver and
connect a wire between the coil antenna and the receiver.  Put the coil
antenna were you get the best reception.
--
Jim Aeschliman                      [e-mail]
Black Diamond, Washington           KD7MK


From [e-mail] Sat Dec 21 12:34:53 1996
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From: crs <[e-mail]>
Newsgroups: sci.physics,rec.radio,rec.radio.amateur.antenna
Subject: Re: Easy AM radio question
Date: Wed, 18 Dec 1996 21:59:11 +0100
Organization: What organization?
Lines: 25
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References: <[e-mail]> <[e-mail]>
Reply-To: [e-mail]
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fiz wrote:
> Let me start by saying I won't condone what I'm about to suggest, its
> probably illegal, you decide.

This is a damn good idea and you're wimping out on it!

[snip]

>
> How about putting a small, very low power transmitter on the roof
> (assuming you can receive the station on the roof) and tie it into a
> receiver tuned to the game (also on the roof).  Before the game starts,
> plant your 'station' on the roof, tune in the game in your living room
> and remove the transmitter when the game is over. Of course, be sure to
> find a frequency not in use locally or you might have some company.

There are also headphone transmitters but they may not have the power.
What about those things that send a signal through the electrical
wiring?
>
> I've even seen 'transmitters' sold for playing a CD player thru a car
> stereo. Plug the CD into the transmitter and tune up the car radio to
> the same frequency. I bet this could be used with the earphone output of
> a small FM radio as well. I think the gizmos I'm thinking of cost about
> $30.


From [e-mail] Sat Dec 21 12:34:54 1996
Newsgroups: rec.radio.amateur.antenna
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!homer.alpha.net!uwm.edu!news-peer.gsl.net!news.gsl.net!news.sgi.com!news.msfc.nasa.gov!in1.nntp.cais.net!NEWS1!not-for-mail
From: Bob Lewis <[e-mail]>
Subject: Re: End-Fed Wire Ant
Message-ID: <[e-mail]>
Date: Mon, 09 Dec 1996 08:55:58 -0500
References: <01bbe2d7$8ab53cc0$026be2cf@pridgent>
Organization: AA4PB
X-Mailer: Mozilla 2.01 (Win95; U)
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T. Pridgen wrote:
>
> Looking for construction plans for an end-fed wire antenna capable of
> covering the ham band. Would like to hear you pros and cons and experiences
> with this type of antenna.
> Please respond to my Email address.
> 73, KC4YTF
> Email: [e-mail] use an end fed wire in inverted-L format with an S
GC auto tuner
located at the base of the tower. Works great on all bands 160 thru 10
meters. I typically use it on the lower bands and WARC bands that my
beam won't cover. The only ground is three ground rods and the tower. No
RF gets back into the shack. I always try to use a wire length such that
the feed point is a high "Z" (multiple of 1/2 wave) on most bands. That
lowers IR losses in the tuner and ground system.



From [e-mail] Sat Dec 21 12:34:55 1996
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From: Ryan Workman <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Equipment For Sale
Date: Sun, 15 Dec 1996 07:11:16 -0500
Organization: OCHS Web Team
Lines: 20
Message-ID: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: dialin1.ocean.city.k12.nj.us
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
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X-Mailer: Mozilla 3.0Gold (Win95; I)

I have the following items for sale:

Kenwood TS-450s/at
     - Digital HF Rig with built in antenna tuner
     - Never Tx with rig
     - Must Sell $950 or BO

Cushcraft R - 7 Vertical Antenna
    - 10 - 40 m
    - Must Sell $150 or bo


 Need more info or to make an offer email me at :
[e-mail]

 More info and specs can be seen at:
    Http://www.oceab.ciyt.k12.nj.us/stu/1998/rworkman/radio

    Ryan Workman, KB2OOP
    [e-mail]


From [e-mail] Sat Dec 21 12:34:56 1996
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From: "Matthew K. Hudes" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.equipment
Subject: Experience with Sommer Discone?
Date: Sun, 15 Dec 1996 11:59:59 -0800
Organization: NetGate Communications
Lines: 7
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Does anyone have experience with the Sommer Discone or Disconical HF
Multiband antennas?  I am interested in running power and have limited
room.  Have there been any comparative tests with other verticals?

Thanks,
Matthew
N6YJL


From [e-mail] Sat Dec 21 12:34:56 1996
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From: n3tvv <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: F.S.  30` TOWER
Date: 12 Dec 1996 03:42:04 GMT
Organization: ProLog - PenTeleData, Inc.
Lines: 10
Message-ID: <[e-mail]>
NNTP-Posting-Host: home.ptd.net
Mime-Version: 1.0
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X-Sender: [e-mail]


30` 3 LEGGED TOWER,

MUST PICK UP

MAKE ME AN OFFER!!

ERIC ,N3TVV([e-mail])




From [e-mail] Sat Dec 21 12:34:57 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!news.sprintlink.net!news-hub.sprintlink.net!news.sprintlink.net!news-dc-5.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!ais.net!noc.van.hookup.net!laslo.netnet.net!news
From: "kc9id" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: F.S. - Cushcraft R-5 Vertical
Date: 21 Dec 1996 01:27:32 GMT
Organization: Lakenet
Lines: 7
Message-ID: <01bbeede$7f7d7760$[e-mail]>
NNTP-Posting-Host: 198.70.69.55
X-Newsreader: Microsoft Internet News 4.70.1155

I have for sale my Cushcraft R-5 vertical HF antenna.  It covers
10-12-15-17-20 Meters.
The Antenna is 1 year old.  I will ship it for $150.00.  If interested,
e-mail me:

Jim Barlament KC9ID
[e-mail]


From [e-mail] Sat Dec 21 12:34:58 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!cs.utexas.edu!uwm.edu!www.nntp.primenet.com!nntp.primenet.com!ix.netcom.com!news
From: [e-mail] (RICK)
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.equipment
Subject: F.S. 26b2 and 424b cushcraft antennas
Date: Mon, 16 Dec 1996 19:05:14 -0600
Organization: Netcom
Lines: 8
Message-ID: <[e-mail]>
NNTP-Posting-Host: nor-la4-06.ix.netcom.com
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X-Newsreader: MicroPlanet Gravity v1.01
Xref: news1.epix.net rec.radio.amateur.antenna:32818 rec.radio.amateur.equipment:44534

Have used Cushcraft 26b2 2m stacked 13 element antennas for sale. This
antenna has been up for about 3 years but is in good shape. Currently is
off tower. Has published forward gain of 18.8dBd. Current price in A.E.S.
catalog is $300.00.  Will sell for $200.00.

Have new but assembled Cushcraft 424b 432mhz boomer, 24 elements on a
17.5ft boom.  Published gain is 18.2dBd.  Paid $130.00.  Will sell for
$100.00.


From [e-mail] Sat Dec 21 12:34:59 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!ix.netcom.com!news
From: KD1YV <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Figured out: Re: My near field calculations need a sanity check
Date: Mon, 16 Dec 1996 13:43:32 -0500
Organization: Hamily !
Lines: 65
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: dby-ct3-43.ix.netcom.com
Mime-Version: 1.0
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CC: [e-mail]

KD1YV wrote:
{snip}
> 20,700 V/m where the MPE for controlled exposure is 1842 / 28.3 MHz = 65.088
 V/m
> and
> 13.2 A/m where the MPE for controlled exposure is 4.89 / 28.3 MHz = 0.17279
A/m{snip}

Well, I think that I pretty well figured it out.  You will note that the Z poi
nts
of the antenna are 16.537 feet, and that the Z point of the maximum values are
also 16.5 feet, while the X axis values are all 0.

What I think that translates to, is that the observer is "touching" the antenn
a.
That would certainly explain the very high values at that point.  When I later
moved my observer back to the ground, i.e., kept the observer's Z value at 0,
all of the results looked Much Happier, i.e., well within permissible limits.

Thanks to those that replied to my posting.

To John Mallick and others interested, yes, NF.EXE is freeware and ftp'able fr
om

ftp://oak.oakland.edu/pub/hamradio/arrl/bbs/programs/nf.zip/

It's actually a subset of the commercially available AO by Brian Beezley.  Tha
nks
to Brian for making this available to the ham community for this purpose.

--
73 de Jim, KD1YV
http://pw1.netcom.com/~jimkd1yv/hamily.html

> ===
>
> 10 m Dipole of #14 Wire
> Ground
> 28.3 MHz
> 1 copper wire, feet
> 1   0 -8.269 16.537   0 8.269 16.537  #14
> 1 source
> Wire 1, center
>
> Default Ground:  Dielectric Constant 14   Conductivity 2 mS/m
>
> -------------------------   NEAR ELECTRIC FIELD  ---------------------------
----
>
>  Power:    100 watts
>
>  Component &         Real       Imaginary     Magnitude      Phase    Peak F
ield
>  Field Point         V/m           V/m           V/m          deg        V/m
>
>  X       0.0      +0.00E+00     +0.00E+00      0.00E+00        0.0
>  Y       3.7      +5.66E+01     -1.30E+02      1.41E+02      -66.4
>  Z      16.5      -1.06E+04     +1.78E+04      2.07E+04      120.9     2.07E
+04
>
> --------------------------   NEAR MAGNETIC FIELD   -------------------------
----
>
>  Power:    100 watts
>
>  Component &         Real       Imaginary     Magnitude      Phase    Peak F
ield
>  Field Point         A/m           A/m           A/m          deg        A/m
>
>  X       0.0      -1.13E+01     -6.83E+00      1.32E+01     -148.8
>  Y      -0.3      +0.00E+00     +0.00E+00      0.00E+00        0.0
>  Z      16.5      +0.00E+00     +0.00E+00      0.00E+00        0.0     1.32E
+01
>
> --
> 73 de Jim, KD1YV
> http://pw1.netcom.com/~jimkd1yv/hamily.html


From [e-mail] Sat Dec 21 12:35:00 1996
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!news-out.communique.net!mr.net!news.idt.net!feed1.news.erols.com!howland.erols.net!news-peer.gsl.net!news.gsl.net!portc01.blue.aol.com!newsstand.cit.cornell.edu!newstand.syr.edu!news.corpcomm.net!news
From: "John Bates, Jr." <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Force 12 C4 Question
Date: Thu, 12 Dec 1996 06:42:49 -0600
Organization: Corporate Communications
Lines: 9
Message-ID: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: lake104.internetland.net
Mime-Version: 1.0
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I have been using a Force 12 C4 for about a year now. My question is on
the 40M lead which goes into switching relays at the bottom of the
tower.

When not in use, should this lead be open,shorted or grounded?

I am unable to get an answer from Force12.

John KB0UY


From [e-mail] Sat Dec 21 12:35:01 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!ix.netcom.com!news
From: Jim O'Connell <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Force 12?????????
Date: Thu, 19 Dec 1996 13:52:09 -0800
Organization: Netcom
Lines: 10
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: chi-il11-18.ix.netcom.com
Mime-Version: 1.0
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Content-Transfer-Encoding: 7bit
X-NETCOM-Date: Thu Dec 19  1:56:06 PM CST 1996
X-Mailer: Mozilla 3.0 (Win16; I)
To: Rick Perry <[e-mail]>

Rick Perry wrote:
>
> In QST Force 12 antenna's have been listing "[e-mail]" as
> their Internet address.  I've tried but can't find them there.  Maybe it
> takes someone brighter than myself to find them at this adr.  Anyone
> have info on a Force 12 HomePage?
>
> Rick, W7AV

That's an e-mail address, not their webpage.


From [e-mail] Sat Dec 21 12:35:02 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!news.kei.com!newsfeed.internetmci.com!www.nntp.primenet.com!nntp.primenet.com!news.fibr.net!news.sprintlink.net!news-fw-6.sprintlink.net!ratty.wolfe.net!usenet
From: Rick Perry <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Force 12?????????
Date: Thu, 19 Dec 1996 08:08:59 -0800
Organization: Wolfe Internet Access, L.L.C.
Lines: 6
Message-ID: <[e-mail]>
NNTP-Posting-Host: yak2-ts1-p40.wolfenet.com
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.0 (Win95; I)

In QST Force 12 antenna's have been listing "[e-mail]" as
their Internet address.  I've tried but can't find them there.  Maybe it
takes someone brighter than myself to find them at this adr.  Anyone
have info on a Force 12 HomePage?

Rick, W7AV


From [e-mail] Sat Dec 21 12:35:02 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!news.sprintlink.net!news-pull.sprintlink.net!news.sprintlink.net!news-peer.sprintlink.net!ratty.wolfe.net!usenet
From: Rick Perry <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Force 12?????????
Date: Thu, 19 Dec 1996 19:28:45 -0800
Organization: Wolfe Internet Access, L.L.C.
Lines: 17
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
NNTP-Posting-Host: yak2-ts1-p40.wolfenet.com
Mime-Version: 1.0
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Jim O'Connell wrote:
>
> Rick Perry wrote:
> >
> > In QST Force 12 antenna's have been listing "[e-mail]" as
> > their Internet address.  I've tried but can't find them there.  Maybe it
> > takes someone brighter than myself to find them at this adr.  Anyone
> > have info on a Force 12 HomePage?
> >
> > Rick, W7AV
>
> That's an e-mail address, not their webpage.

Thanks Jim and to the other fellows who replied to my question.  Now I
know.  73, Happy Holidays,

Rick, W7AV


From [e-mail] Sat Dec 21 12:35:04 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.net!demos!news-out.communique.net!mr.net!www.nntp.primenet.com!nntp.primenet.com!feed1.news.erols.com!news.dra.com!news.id.net!news.cic.net!phish.nether.net!erico
From: [e-mail] (Eric Speringo)
Newsgroups: rec.radio.amateur.antenna
Subject: FS: CB Service Manuals (Tram)
Date: 15 Dec 1996 03:28:54 GMT
Organization: Nether.Net -- Public access Linux system
Lines: 22
Message-ID: <58vr9m$[e-mail]>
NNTP-Posting-Host: phish.nether.net
X-Newsreader: TIN [version 1.2 PL2]

For Sale:
*RARE* Tram Factory Service Manuals (Gone out of business now) for Tram
 Citizen Band Radios  (CB   SSB/AM)
These manuals include:
o  Tune Up Procedures
o  Schematics
o  Photos of the PC Boards
o  Alignment procedures
o  Testing
The manuals are 10 to 20 pages long. In SUPERB condition!
No soiled, roughed, or dogeared pages. The booklet is stapled.
        Model             Price
          XL               $25
          XL5              $30
          DIAMOND 40       $40
          DIAMOND 60       $50
    D201 (Base unit)       $10
Please respond via email to [e-mail] or call my machine
at
[phone] and leave a message or fax (since these groups tend to get
cluttered) Thank you.



From [e-mail] Sat Dec 21 12:35:04 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: FS: CB Service Manuals (Tram)
Date: 16 Dec 1996 01:31:26 GMT
Organization: AOL http://www.aol.com
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References: <58vr9m$[e-mail]>
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In article <58vr9m$[e-mail]>, [e-mail] (Eric
Speringo) writes:

>
>For Sale:
>*RARE* Tram Factory Service Manuals (Gone out of business now) for Tram
> Citizen Band Radios  (CB   SSB/AM)

What the hell do CB manuals have to do with antennas?


From [e-mail] Sat Dec 21 12:35:05 1996
Path: news1.epix.net!news3.epix.net!uunet!in1.uu.net!128.83.139.5!cs.utexas.edu!news.ti.com!usenet
From: Joe <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: FS: CB Service Manuals (Tram)
Date: Fri, 20 Dec 1996 17:30:59 -0800
Organization: Hi from Taipei TAIWAN !!!
Lines: 13
Message-ID: <[e-mail]>
References: <58vr9m$[e-mail]> <[e-mail]>
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CC: [e-mail]

[e-mail] wrote:
> What the hell do CB manuals have to do with antennas?

Maybe he hit the wrong newsgroup???

p.s.  nice language
Joe
----------------------------------------------------------
Amateur Radio:  BV/N0IAT   Taipei TAIWAN Republic of China
    http://www.transend.com.tw/~joentam/index1.html
ex.  7J1AOF (Japan)  YU3/N0IAT (Slovenia)  KA0ZDH (Novice)
Licensed Radio Amateur since 1986.  Comments are mine only.
----------------------------------------------------------


From [e-mail] Sat Dec 21 12:35:06 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!feed1.news.erols.com!cpk-news-hub1.bbnplanet.com!news.bbnplanet.com!su-news-hub1.bbnplanet.com!news.pbi.net!ns2.mainstreet.net!ns2.southeast.net!users!radiotr
From: [e-mail] (radiotr)
Newsgroups: rec.radio.amateur.antenna
Subject: FS: DB498-K 900 Yagi
Date: 12 Dec 1996 01:45:43 GMT
Organization: Southeast Network Services, Inc.
Lines: 6
Message-ID: <58no47$[e-mail]>
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X-Newsreader: TIN [version 1.2 PL2]

FS: New, never installed Decibel Products, DB-498K, 6 element Rugged
yagi, 9 element gain..With angle iron mount...With cap still on N-connector.
Freq Range: 896-960 MHZ.....List $255.00....1st Reply gets it for $130.00
delivered UPS/COD....Will trade for Motorola gear, No trunkmounts...

Reply to: [e-mail] or [e-mail]


From [e-mail] Sat Dec 21 12:35:07 1996
Newsgroups: rec.radio.amateur.antenna
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!tezcat!news.bbnplanet.com!cam-news-hub1.bbnplanet.com!howland.erols.net!netcom.com!dwebster
From: Dennis Webster <[e-mail]>
Subject: FS: MFJ 901 tuner and ladder line
Content-Type: text/plain; charset=us-ascii
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Reply-To: [e-mail]
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Lines: 7

For sale MFJ Tuner in good working order with a role of new 450 ohm
ladder line. $35.00 and I will pay shipping in CONUS.
Tuner handles 200 watts and will feed balanced line, coax and random
wire antennas.

Dennis Webster WJ6H
[e-mail]


From [e-mail] Sat Dec 21 12:35:08 1996
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From: [e-mail] (FisherDoc)
Newsgroups: rec.radio.amateur.antenna
Subject: FS: NOS Jerrold vacuum tube Post Amplifier
Date: 21 Dec 1996 08:34:33 GMT
Organization: AOL http://www.aol.com
Lines: 9
Message-ID: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

NEW Jerrold Model SCA 213 CR Post Amp vaccum tube design.
Absolutly pristine, rack mount

Any reasonable offer accepted!

Thanks,
AL
[e-mail]
I collect vacuum tube hi-fi


From [e-mail] Sat Dec 21 12:35:09 1996
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From: Jeff Hutchinson <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: FS:Butternuts (2)
Date: Wed, 11 Dec 1996 13:14:39 -0500
Organization: Marine Electronics Services
Lines: 3
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Pls see ad in rec.radio.swap.
Thanks & 73,
Jeff N4JT


From [e-mail] Sat Dec 21 12:35:09 1996
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From: [e-mail] (Gustav Kⁿhn)
Newsgroups: rec.radio.amateur.antenna
Subject: Fw: ICOM 706 mods.
Date: Wed, 11 Dec 96 18:54:34 GMT
Organization: Private
Lines: 19
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----------------------------Forwarded Message--------------------------------

> Hi all fellow Hams and "i can improve the design" ers
> I would like to know if much has been done to improve the pathetic sensitivi
ty
> of
> this rig above 110Mhz (2m is ok). I had a look at the service manual and it
> appears that the so called "yellow wire" mod only results in the 2 m filter
> being
> connected in parallel with the other 60 to 200(ha ha ) Mhz filter.
> I have seen some work done by Gary Coffman and also modelled this filter usi
ng
> Puff and that gave me the same results as Gary's. The mods to this filter he

> suggests also models the same, but I'm not brave enough to start fiddling in
 the
> rig yet.
> Regards,
> Gustav Kⁿhn ZS1NZ




From [e-mail] Sat Dec 21 12:35:11 1996
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From: [e-mail] (Jim Kehler)
Newsgroups: rec.ham-radio,rec.radio.amateur,rec.radio.amateur.antenna,rec.radio.amateur.equipment,rec.radio.amateur.misc
Subject: Gary Coughman SUPPORTS HAZING !!!
Date: Fri, 20 Dec 1996 15:59:05 GMT
Organization: Kuentos Communications Inc.
Lines: 49
Message-ID: <59fhd5$[e-mail]>
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[e-mail] (Gary Coffman) wrote:

>Now my tower has almost a full section buried. In other words the
>hole is 10 feet deep and has 2 feet of aggregate in the bottom. I
>dug it by hand with a posthole digger. Not with an auger, with a
>real posthole digger. I started the hole with the regular handles,
>and changed to longer handles as the hole got deeper. It took two
>leisurely mornings to finish (too hot to dig in the afternoon).

>Gary
>--
>Gary Coffman KE4ZV          |    You make it,     | Due to provider problems
>Destructive Testing Systems |    we break it.     | with previous uucp addres
ses
>534 Shannon Way             |    Guaranteed!      | Email to [e-mail]
>Lawrenceville, GA 30244     |                     |

Gee, Gary, you just blew your image. We all thought you were Hi Tek.

'Real hams do it on the giga hertz at 56k baud, and real hams dig tower holes
with a post hole digger'.  I don't know, something just doesn't seem to fit.

Personally I think post hole diggers are an obsolete, antiquated way to dig a
hole that should be banned.   Why should today's modern digital hams be
forced to have a post hole digger jambed down their throat just because they
want to have a tower ?  No commercial outfit uses post hole diggers anymore.
They all have gas powered augers, and big trucks with giant drill bits.  Why
should hams be subject to using silly, outdated, antiquated tools for digging
holes when nobody else is using them ?  To suggest a ham dig a tower hole
with a post hole digger is nothing but HAZING ! Just because YOU like having
blisters on YOUR hands doesn't mean ALL of us have to like it.  How about peop
le
with disabilities ?  Do you expect disabled people to spend two days in the ya
rd
with a post hole digger just because YOU did it ? What about people who live i
n
places where the dirt is REALLY HARD ?  Should they be kept out of ham radio
just because of your silly post hole digger hazing ritual ?

I think not.  I think people should be able to just pick up the phone, call on
e
of those guys with the big trucks with the giant drill bits, and let THEM come
over and dig the hole for the tower.   Post hole diggers are keeping a lot of
quality, qualified people out of ham radio, and it's time this hazing ritual
come to an END !!!  I am going to write to the ARRL and WARC 99 and tell them
I
think it's about time to get rid of post hole diggers for ever !!!

73, Jim KH2D








From [e-mail] Sat Dec 21 12:35:12 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!news2.digex.net!news6.digex.net!news.gteais.com!news
From: aor <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Ground Connections
Date: Sun, 15 Dec 1996 18:43:24 -0500
Organization: gteais-org
Lines: 11
Message-ID: <[e-mail]>
References: <[e-mail]> <58dv76$i26@news> <[e-mail]>
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To: "James D. Cronin" <[e-mail]>

I used CADWELD One-Shot fusing elements which actually fuse/weld your
wire to ground rod.  Costs are small for just a few joints.  Joints can
be burried after fusing.  Rock-solid, no doubt about it.

Contact "The RF Connections"

http://www.therfc.com/cadweld.htm

Check it out!

Al


From [e-mail] Sat Dec 21 12:35:13 1996
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!usenet.eel.ufl.edu!arclight.uoregon.edu!mr.net!news-out.microserve.net!news-in.microserve.net!news.supernet.net!nntp.cntfl.com!usenet
From: Joe Foor <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Ground rod and rocks... HELP!
Date: Sun, 08 Dec 1996 11:16:34 -0600
Organization: CMDS News machine
Lines: 24
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
Reply-To: [e-mail]
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Dan Walker wrote:
>
> I need to drive in a ground rod, but the earth around my QTH has so
> many rocks that it won't go in more than 18"
>
> Anybody have any ideas?

When I was installing LF antenna systems, overseas, it was common to
have to drive ground rods into coral or sandstone. Sometimes it would
take all day (with several people to rotate on the sledge hammer), but
just keep on pounding and it will go in (assuming this is a steel rod).

Don't bother trying to pull out a ground rod, driven into rock, because
it will not have gone in straight. The rod bends in odd directions as
it penetrates the rock, and as you drive it you are swaging it through
the bends, as well as penetrating new rock.

Once, the tip of a rod came back out the surface a few feet to one
side, as we were driving it in.

regards,
Joe kf4dys




From [e-mail] Sat Dec 21 12:35:14 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!newspump.sol.net!posts.execpc.com!usenet
From: [e-mail] (Glenn Ziolkowski)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Ground rod and rocks... HELP!
Date: Sat, 21 Dec 1996 03:01:28 GMT
Organization: Exec-PC BBS Internet - Milwaukee, WI
Lines: 25
Message-ID: <59fjp4$[e-mail]>
References: <[e-mail]> <[e-mail]> <[e-mail]> <58mkib$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: lyra.execpc.com
X-Newsreader: Forte Free Agent 1.0.82

[e-mail] wrote:

>In article <[e-mail]>, [e-mail] wrote:
>>ernie <[e-mail]> wrote:
>>
>>>Dan Walker wrote:
>>>>
>>>> I need to drive in a ground rod, but the earth around my QTH has so
>>>> many rocks that it won't go in more than 18"

<other responses snipped>

Electricians use a hammer drill to drive rods.  There are attachments
specifically for this purpose.  I would think rod with a rounded or
pointed end should steer itself around most rocks or boulders with
this method.

In my soil conditions, it takes about 1 minute to drive an 8-ft. rod
this way.  Sure beats the sledge hammer!

Perhaps you could rent the equipment locally.  Or make friends with a
mason or construction electrician.

Glenn



From [e-mail] Sat Dec 21 12:35:15 1996
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From: [e-mail] (Graham Seale)
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.misc,alt.engineering.electrical
Subject: Re: Grounding system?
Date: Fri, 13 Dec 1996 00:09:19 GMT
Organization: Southline Electrolab
Lines: 11
Message-ID: <[e-mail]>
References: <[e-mail]> <wtshaw-0712961957440001@207.17.188.148> <58fs5j$[e-mail]> <01bbe574$1d2ee440$f50f2399@peter-s>
Reply-To: [e-mail]
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In message <01bbe574$1d2ee440$f50f2399@peter-s> "Peter Gottlieb" wrote:

> Too bad you can't capture it.  A small ball lightning has about 25 kWh of
> energy.

I'm impressed! Don't get me wrong, but I have just *got* to ask..
How do we know? How would such a thing be estimated?

G4WNT
--
Graham


From [e-mail] Sat Dec 21 12:35:16 1996
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.misc,alt.engineering.electrical
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!news.sprintlink.net!news-peer.sprintlink.net!metro.atlanta.com!news.radio.org!wa4mei!ke4zv!gary
From: [e-mail] (Gary Coffman)
Subject: Re: Grounding system?
Message-ID: <[e-mail]>
Reply-To: [e-mail] (Gary Coffman)
Organization: Destructive Testing Systems
References: <[e-mail]> <[e-mail]> <[e-mail]>
Date: Sat, 14 Dec 1996 17:06:09 GMT
Lines: 55
Xref: news1.epix.net rec.radio.amateur.antenna:32754 rec.radio.amateur.misc:120803 alt.engineering.electrical:10200

In article <[e-mail]> "William E. Sabin" <sab
[e-mail]> writes:
>Gary Coffman wrote:
>>
>> Connecting your antenna mast directly to the building lightning downleads
>> with #4 was a very good step. This *should* divert the majority of a direct
>> strike's currents into the building lightning mitigation system and frame.
>> Your ground window will protect you from the rest. One caution, however,
>> large currents can flow between this bond point and your station ground
>> window. To avoid damage to coax and control wiring, run a heavy grounding
>> lead between these two points. (Yeah, that'll cause a ground loop, but
>> don't worry about that, the coax shields already did, and the ground
>> window will short out the loop for the equipment on the inside of the
>> window.)
>>
>
>I wonder if, instead of *bonding* the roof top environment to the station
>environment, it would be better to *isolate* the two. If the antenna is
>tied to the building structure using heavy, low inductance straps, then
>if all cables to the radio are loaded with large ferrite beads that
>present a high longitudinal impedance to the impulse, then the protection
>at the equipment location could be less draconian (gas tubes, spark gaps,
>isolation transformers etc.). The idea of introducing a ground loop does
>not fly too well.
>
>Bill W0IYH

The bulk of the energy in a lightning surge is below 2 MHz. While there
are components all the way up into UHF, most of the energy is concentrated
at low frequencies. This makes trying to stop it with ferrite beads more
than slightly problematic. And the problem with coax becomes aggravated
by decoupling the outside of the braid. The inner conductor then becomes
a lower impedance path for the surge than the outer, and the differential
voltage between inner and outer becomes much larger. This is almost certain
to arc the insulation and ruin the coax. It may do more than that.

I'd note that there is a differential mode voltage problem anyway
for a long coax run. The velocity factor *inside* the coax is different
from the velocity factor on the *outside* of the coax, so at certain
lengths large differential voltages can exist. The length of run needed
for maximum differential voltage varies with the dielectric constant
of the insulation. With airline, there is virtually no effect. But with
foam insulation the effect is quite pronounced.

It is a good practice to have a coax suppressor at the tower base
to snub differential mode voltages as much as possible before the
coax heads on over to the entrance bulkhead at the shack. This also
has the added benefit of shorting the single turn transformer formed
by the coax and the tower.

Gary
--
Gary Coffman KE4ZV          |    You make it,     | Due to provider problems
Destructive Testing Systems |    we break it.     | with previous uucp address
es
534 Shannon Way             |    Guaranteed!      | Email to [e-mail]
Lawrenceville, GA 30244     |                     |


From [e-mail] Sat Dec 21 12:35:17 1996
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From: "John H. Alderman III" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.misc,alt.engineering.electrical
Subject: Re: Grounding system?
Date: Sat, 14 Dec 1996 15:42:14 -0500
Organization: Alderman HVAC/Alderhood/ MI
Lines: 7
Message-ID: <[e-mail]>
References: <[e-mail]> <wtshaw-0712961957440001@207.17.188.148> <58fs5j$[e-mail]> <01bbe574$1d2ee440$f50f2399@peter-s> <[e-mail]>
Reply-To: [e-mail]
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To: [e-mail]
Xref: news1.epix.net rec.radio.amateur.antenna:32762 rec.radio.amateur.misc:120818 alt.engineering.electrical:10202

Question for you guys..
It is related to your traffic which brings back memories of me DX in
from my shack off my room as a boy on all kind of home brew receivers.
Have you ever charged batteries with a crystal Radio?
John Alderman
[e-mail]
http://www.randomc.com/~mountain/


From [e-mail] Sat Dec 21 12:35:19 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.misc,alt.engineering.electrical
Subject: Re: Grounding system?
Date: 16 Dec 1996 18:04:05 GMT
Organization: DigiPhone Corporation, Bryan/College Station Texas 409-693-8885
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In <[e-mail]>, "William E. Sabin" <sabinw@crp
l.cedar-rapids.lib.ia.us> writes:
>Gary Coffman wrote:
>>
>> In article <[e-mail]> "William E. Sabin" <
[e-mail]> writes:
>> >
>> >I wonder if, instead of *bonding* the roof top environment to the station
>> >environment, it would be better to *isolate* the two. If the antenna is
>>> tied to the building structure using heavy, low inductance straps,  then
>>> if all cables to the radio are loaded with large ferrite beads that
>>> present a high longitudinal impedance to the impulse, then the  protection
>>> at the equipment location could be less draconian.
>
>
>>
>> The inner conductor then becomes
>> a lower impedance path for the surge than the outer, and the differential
>> voltage between inner and outer becomes much larger.
>
>Ferrite loading on a coax also creates a large *longitudinal* lumped
>impedance for the center lead that is almost identical to that on the
>braid. This basic principle is used in coaxial baluns and is easy to
>demonstrate. The center lead is not "isolated" from longitudinal things
>that are happening on the braid, not even on the "outside" of the braid.
>This longitudinal loading can be effective down to very low frequencies
>with the right kind of ferrite. For lightning protection the ferrites
>would be "bodacious" for sure, but not extremely so.
>
>I understand that PolyPhaser sells coax "absorbers" and I think also
>isolation transformer devices, do they not?
>
>The idea of *bonding* the antenna system to the operating environment and
>creating a ground loop scares the hell out of me. Do we really want to do
>that? Isn't *isolation* a lot better if we can do it?
>
>I don't mean to be merely argumentative, but some of the things I am
>seeing about this lightning protection problem bother me. I have copied
>and read PolyPhaser's web site material, but questions remain.
>
>Bill W0IYH

It bothers Polyphasor folks also, done the wrong way and for the wrong
reasons as I read their material.   When you consider that the ground loop
problem has an average quarter wave length of about 150-175 feet or
so during the heaviest inital phase of the strike, you begin to see why
current and voltage nodes are also in the puzzle!  As I believe what I have
read of their book, that is one reason you do NOT bond coax to the tower
in the down run, unless the run exceeds 150-175 feet in length.

Ground loops take on a completely different view when they are viewed as
part of a 175 foot wavelength mechanism with tens of thousands of amperes
of RF current.   Recall also that the wavelength decreases as the strike
progresses in time.  If part of the circuit is blown away during the initial
hit, what happens then?

Right?


//-----------------------------
Mike - W5WQN
[e-mail]
[e-mail]



From [e-mail] Sat Dec 21 12:35:20 1996
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From: [e-mail] (W T Shaw)
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.misc,alt.engineering.electrical
Subject: Re: Grounding system?
Date: 18 Dec 1996 06:41:13 GMT
Organization: Another Netscape News Server User
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In article <5942d3$[e-mail]>, [e-mail] wrote:
>
> To my view, it isn't just a case of, ahem, strike and mash bondage here.  :)
>
> It's selective torture for the unitiated and unprotected..
>
> More a case of stand and deliver instead of just lay down and be quiet!
>
> The secret, as you rightly say, I think, is still never let-em in the door!
>
If you look at the roof of any hospital and those of many old houses, you
will likely see a forest of groud rods.  These are not to attract
lightening.  In fact they have an opposite effect, they are to discharge
the surrounding air, reduce the build up of static electricity.  About
whether they should be sharp or not on the end, I think it is more  that
it induces people to believe subliminally that that is more likely to
work.

Functionally, a good antenna ground may have a similiar effect.  Often,
lightening does not pick what you would consider the best path, but
selectively seeks out something that might present a bit poorer path.

I once lived in a good place to study such effects and had a series of
antenna structures.  The results, involving lots of toasted coax, include
these, given two choices a grounded beam and an pointy stucture of the
same height, the beam was seldom hit because a greater pocket of
discharged atmosphere tends to steer lightening away from itself.

Even without a cloud in the sky, the static that can build up is often
enough to cause sparks in open connectors where the dielectric is
missing.  Some days, when I forgot to ground all the antennas, I would see
quite a show at the connectors.  The poping was sometimes loud enough to
wake me up at night, and in the dark, if the fireplace had burned low
enough, it was an unforgetable sight.

Bill, k5pcw
--
WTShaw--MacCrypto Programmer--The Following is in FUDGE
Vxdpq qcqva gdocd pokch hx-wd ll/,i ?-wry vegee n/wvm rt/tb bh/nd xdtlv ..mi.
fzngq hj,zf dzvrb uy/xq njdzc ?=uGo me/gg gu??g /?wen --ueo een-g -p,ym ohvfg
njrjb ,=/nl kk?zi ky.-m po,cg omufg koy.m kkmyi po,dg db,lb /,plz nn=mu d.awq


From [e-mail] Sat Dec 21 12:35:21 1996
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From: Jim Hutchings <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.misc,alt.engineering.electrical
Subject: Re: Grounding system?
Date: Fri, 20 Dec 1996 09:50:53 -0800
Organization: SaskNet News Distribution
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> >
> If you look at the roof of any hospital and those of many old houses, you
> will likely see a forest of groud rods.  These are not to attract
> lightening.  In fact they have an opposite effect, they are to discharge
> the surrounding air, reduce the build up of static electricity.  About
> whether they should be sharp or not on the end, I think it is more  that
> it induces people to believe subliminally that that is more likely to
> work.
> It seems to me that I remember an old high school physics experiment in
which a sharp point was connected to a source of static electricity (a
Wimshurst machine, I think...likely misspelled).  When a charge was
placed on the sharp point, a noticible current of air was produced as a
result of the electrostatic charge being released from the sharp point.
A company which used to manufacture lightning protection systems took
advantage of this property of sharp points by building an array which
would, when connected to a good ground, reduce the cloud to ground
potential and prevent lightning strokes.   In one installation, a Windsor
radio station measured the static disappation current and fired up
standby power ahead of impending storms thus avoiding the outages
involved with bad weather.  These systems can get pretty elaborate.


From [e-mail] Sat Dec 21 12:35:22 1996
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From: "William E. Sabin" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.misc,alt.engineering.electrical
Subject: Re: Grounding system?
Date: Fri, 20 Dec 1996 15:58:24 -0800
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J. Fred Riley wrote:
>
> As a point of interest, whether it exists or not, we seldom see damage
> at either AM or FM radio stations from direct strikes to towers.  The
> damage is usually caused by strikes in proximity to the power lines
> feeding the station which induce spikes into the power line.  Where
> this has been a problem we can ususally eliminate problems entirely by
> using an isolation transformer that has a good faraday shield between
> the windings.
>
> One more piece of information for which interest may not exist:
> Putting a nice big hunk of ferrite around the feedline won't prevent
> the strike from eating your equipment.  If you look at the energy
> distribution you find a big blob of energy at 5KHz that'll get around
> lightening loops, lightening chokes, etc, etc.  You have to short it
> to ground--or, as in networks built by those who know, you put a
> series pass capacitor in the feedline center conductor path to keep
> that nasty return current off your center conductor.
>

A "coordinated" system that *isolates* the equipment from lightning
damage all across the frequency spectrum must be the right approach. No
one single "fix" is enough. The things that work at low frequency are no
good at the higher frequencies, and vice versa.

Bill W0IYH


From [e-mail] Sat Dec 21 12:35:23 1996
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From: [e-mail] (J. Fred Riley)
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.misc,alt.engineering.electrical
Subject: Re: Grounding system?
Date: Fri, 20 Dec 1996 22:41:04 GMT
Organization: INTERNET AMERICA
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"William E. Sabin" <[e-mail]> wrote:
>A "coordinated" system  must be the right approach.

Exactly!  But with a limited budget, one must prioritize.  And the
power line is the starting point after one finishes the grounding.



Fred, W8OY

[e-mail]  [e-mail]


From [e-mail] Sat Dec 21 12:35:24 1996
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From: [e-mail] (J. Fred Riley)
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.misc,alt.engineering.electrical
Subject: Re: Grounding system?
Date: Fri, 20 Dec 1996 20:41:28 GMT
Organization: INTERNET AMERICA
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Jim Hutchings <[e-mail]> wrote about:
>A company which used to manufacture lightning protection systems

Contact is Roy Carpenter at:
Lightning Elimination Associates, then
Lightning Elimination Consultants, now

>advantage of this property of sharp points by building an array

Called a dissipation array

>a Windsor radio station

CKLW, installed in 1975

>measured the static disappation current and fired up
>standby power ahead of impending storms
> These systems can get pretty elaborate.
which, unfortunately, detuned the AM towers they're on---

As a point of interest, whether it exists or not, we seldom see damage
at either AM or FM radio stations from direct strikes to towers.  The
damage is usually caused by strikes in proximity to the power lines
feeding the station which induce spikes into the power line.  Where
this has been a problem we can ususally eliminate problems entirely by
using an isolation transformer that has a good faraday shield between
the windings.

One more piece of information for which interest may not exist:
Putting a nice big hunk of ferrite around the feedline won't prevent
the strike from eating your equipment.  If you look at the energy
distribution you find a big blob of energy at 5KHz that'll get around
lightening loops, lightening chokes, etc, etc.  You have to short it
to ground--or, as in networks built by those who know, you put a
series pass capacitor in the feedline center conductor path to keep
that nasty return current off your center conductor.



Fred, W8OY

[e-mail]  [e-mail]


From [e-mail] Sat Dec 21 12:35:25 1996
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From: "William E. Sabin" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.misc,alt.engineering.electrical
Subject: Re: Grounding system?
Date: Sat, 21 Dec 1996 04:36:34 -0800
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[e-mail] wrote:
>
>
>    Amen, and if you are fortunate enough to live in the country,
>        a seven fold chorus of amen...

Hallelujah, brothers and sisters. Here in eastern Iowa there are some
beautiful hilltop locations that I would like to move to.

Bill W0IYH


From [e-mail] Sat Dec 21 12:35:26 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.misc,alt.engineering.electrical
Subject: Re: Grounding system?
Date: 21 Dec 1996 08:10:43 GMT
Organization: DigiPhone Corporation, Bryan/College Station Texas 409-693-8885
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In <[e-mail]>, [e-mail] (J. Fred Riley) wri
tes:
>"William E. Sabin" <[e-mail]> wrote:
>>A "coordinated" system  must be the right approach.
>
>Exactly!  But with a limited budget, one must prioritize.  And the
>power line is the starting point after one finishes the grounding.
>
>
>
>Fred, W8OY
>
>[e-mail]  [e-mail]

   Amen, and if you are fortunate enough to live in the country,
       a seven fold chorus of amen...

//-----------------------------
Mike - W5WQN
[e-mail]
[e-mail]



From [e-mail] Sat Dec 21 12:35:28 1996
From: [e-mail] (mark morgan)
Newsgroups: rec.radio.amateur.antenna
Subject: HAM EQUIPMENT 4 SALE(sory about the last article)
Date: Tue, 17 Dec 1996 18:55:52 GMT
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sorry about the last article of 4 sale stuff i sent. had local
problem.
the list of stuff must go asap.  the prices can be adjusted.  you can
make me an offer but don't insult my ham experience please.
all equipment is in very good or ment condition with documentation.  i
will pay for shipping if you take the listed price.  if you want to
talk about the price then we must talk about the shipping.  payment
will be agreed upon on the phone or email.  thank you.

*icom 751 with filters for cw,rtty,voice.  voice module, direct key
entry, desk mic, internal power supply.             800.00
*kenwood 700sp vhf all mode with mic.           300.00
*midland 2m radio.                                              50.00
*mfj 3kw delux versatuner.                               295.00
*drake L7 amplifer 10-160 2kw                        800.00
*mfj 1270 tnc.                                                   25.00
*kam all mode tnc. up to paktor.                      100.00
*pac-com handi packet.                                   100.00
*cushcraft R5 hf vertical antenna.                      75.00
*diamond 2m base antenna.                               50.00
*cushcraft 2m base antenna.                              50.00
*drake 2m portable radio (neet)                           25.00
*th-6 hf beam antenna.                                      200.00
*ham 4 rotor with controler                                 100.00
********and thats all******************************************
please email me at [e-mail]
serious people may leave me their phone number or ask for mine and ill
give it to you via email.




From [e-mail] Sat Dec 21 12:35:29 1996
From: [e-mail] (mark morgan)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: HAM EQUIPMENT 4 SALE(sory about the last article)
Date: Fri, 20 Dec 1996 02:38:52 GMT
References: <[e-mail]>
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[e-mail] (mark morgan) wrote:
NO MORE REPLYS IS REQUIRED. THANKS.
>sorry about the last article of 4 sale stuff i sent. had local
>problem.
>the list of stuff must go asap.  the prices can be adjusted.  you can
>make me an offer but don't insult my ham experience please.
>all equipment is in very good or ment condition with documentation.  i
>will pay for shipping if you take the listed price.  if you want to
>talk about the price then we must talk about the shipping.  payment
>will be agreed upon on the phone or email.  thank you.
NO MORE REPLYS IS REQIRED. THANKS.
>*icom 751 with filters for cw,rtty,voice.  voice module, direct key
>entry, desk mic, internal power supply.             800.00
>*kenwood 700sp vhf all mode with mic.           300.00
>*midland 2m radio.                                              50.00
>*mfj 3kw delux versatuner.                               295.00
>*drake L7 amplifer 10-160 2kw                        800.00
>*mfj 1270 tnc.                                                   25.00
>*kam all mode tnc. up to paktor.                      100.00
>*pac-com handi packet.                                   100.00
>*cushcraft R5 hf vertical antenna.                      75.00
>*diamond 2m base antenna.                               50.00
>*cushcraft 2m base antenna.                              50.00
>*drake 2m portable radio (neet)                           25.00
>*th-6 hf beam antenna.                                      200.00
>*ham 4 rotor with controler                                 100.00
>********and thats all******************************************
>please email me at [e-mail]
>serious people may leave me their phone number or ask for mine and ill
>give it to you via email.
NO MORE REPLYS IS REQUIRED. THANKS.






From [e-mail] Sat Dec 21 12:35:30 1996
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From: [e-mail] (Wexelbaum)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Ham-Ant Digest V96 #870
Date: 20 Dec 96 15:54:21 GMT
Organization: ucsd usenet gateway
Lines: 5
Message-ID: <Pine.SV4.3.92.961220105208.13922B-100000@bookworm>
References: <[e-mail]>
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]

Will sombody edit the pyramid scheme off here?  This is not a legal
operation and has nothing to do with ham antennas or news.  Pyramid
schemes are nothing new.
Vy 73, Bob W2ILP



From [e-mail] Sat Dec 21 12:35:31 1996
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From: [e-mail] (Wexelbaum)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Ham-Ant Digest V96 #900
Date: 20 Dec 96 18:40:05 GMT
Organization: ucsd usenet gateway
Lines: 10
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References: <[e-mail]>
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Originator: [e-mail]

This is for Brian who has buildings blocking his AM reception.  Put a long
wire antenna of any length.  It would be best if the antenna plus the feed
wire is more than 75 feet long and most of your wire is on the roof as
high as practical.  If the radio does not have an external antenna
connection you can couple the antenna to the radio using a ferrite coil
near the radios internal antenna.  The other end of the coil can go to
ground via a water pipe connection.  If you dont want to run a ground
connection try using the radio's chassis.  Hope you hear what you are
looking for.  Vy 73, Bob W2ILP



From [e-mail] Sat Dec 21 12:35:32 1996
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From: [e-mail] (Bea and Marvin Jones)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: HARDLINE - 230 Ft of New 1 5/8 Gas Hardline For Sale
Date: 12 Dec 1996 18:49:12 GMT
Organization: Rocky Mountain Internet - (800) 900-RMII
Lines: 7
Message-ID: <58pk38$[e-mail]>
References: <58n2fb$[e-mail]>
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Edward Addy ([e-mail]) wrote:
: We have an excess spool of 1 5/8 inch gas heliax which we wish to sell.

...and, the impedance is   ?

Jonesy  W3DHJ



From [e-mail] Sat Dec 21 12:35:33 1996
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From: Edward Addy <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: HARDLINE - 230 Ft of New 1 5/8 Gas Hardline For Sale
Date: Fri, 13 Dec 1996 19:55:47 -0500
Organization: The North American Center For Emergency Communications (NACEC)
Lines: 14
Message-ID: <[e-mail]>
References: <58n2fb$[e-mail]> <58pk38$[e-mail]>
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Bea and Marvin Jones wrote:
>
> Edward Addy ([e-mail]) wrote:
> : We have an excess spool of 1 5/8 inch gas heliax which we wish to sell.
>
> ...and, the impedance is   ?
>
> Jonesy  W3DHJ
Sorry about that.

The impedance is 50 Ohm.

Edward Addy
NACEC Center


From [e-mail] Sat Dec 21 12:35:33 1996
Newsgroups: rec.radio.amateur.antenna
Subject: Has anyone used an Arrow dual band corner beam on ATV?
From: [e-mail] (Jason Reighard KB8SFC)
Organization: |||||||||||      www.clover.net/cocoman         |||||||||||||||||
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Date: 17 Dec 96 07:58:10 GMT
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Has anyone used an Arrow dual band corner beam on ATV?
If so how good does it work.
What is the SWR in the ATV portion and FM portion of 70 cm?

Thanks in advance

Jason
KB8SFC



From [e-mail] Sat Dec 21 12:35:34 1996
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From: [e-mail] (doug starwalt)
Newsgroups: rec.radio.amateur.antenna
Subject: Helical Antenna Fuction?
Date: Wed, 18 Dec 1996 20:16:49 UNDEFINED
Organization: Info Avenue INTERNET Access
Lines: 14
Message-ID: <[e-mail]>
NNTP-Posting-Host: dialin046.carol.net
X-Newsreader: Trumpet for Windows [Version 1.0 Rev B final beta #4]

        I am doing research on helical antennas. The local university does
not have Kraus's text on helicals.  In particular, I am looking for a function

that describes the dimensions of a helical for a particular frequency.
Johnson and Jasik do not give this in the 2nd Ed. of the Antenna Engineering
Handbook.

        I seem to remember an article in one of the mags about using PVC and foil
tape for a satellite helix. It may have given the desired fuction but perhaps
only referenced it.

Any help would be appreciated.

Doug Starwalt
KB4FEM


From [e-mail] Sat Dec 21 12:35:35 1996
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From: Leo Potjewijd <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Helical Antenna Fuction?
Date: 19 Dec 1996 21:38:11 GMT
Organization: Lazy Lion
Lines: 21
Message-ID: <59cck3$[e-mail]>
References: <[e-mail]>
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Hi Doug,

I remembered reading something about helix antennas in 'Rothammels
AntennenBuch' (ISBN3-440-07018-2). Just looked it up and found it to be
so little (only 3 paragraphs), I'll retype the essence of it:

- every turn has 2 wavelengths of wire
- spacing of windings 1/2 wavelength
- when constructed as a dipole, wind the halves in opposite directions
- use 5 to 10 turns, the more turns, the narrower the bandwith
- you can use a conductive carrier (mast) of about 0.23 wavelength dia.

An example dipole with 2x5 turns is said to have 7dB gain and an
impedance of 50 - 100 Ohms (?)....

Anyway, I hope this helps (a little).

Good luck, Leo





From [e-mail] Sat Dec 21 12:35:36 1996
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From: [e-mail] (doug starwalt)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Helical Antenna Fuction?
Date: Thu, 19 Dec 1996 18:46:06 UNDEFINED
Organization: Info Avenue INTERNET Access
Lines: 25
Message-ID: <[e-mail]>
References: <[e-mail]> <59cck3$[e-mail]>
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X-Newsreader: Trumpet for Windows [Version 1.0 Rev B final beta #4]

Thanks for the feedback!  Today I made another trip to the university library
and found the literature I needed last week.  The IEEE Transaction on Antennas

and Propogation references from the Antenna Engineering Handbook were
excellent.  Harris makes things much easier in the 1961 text also.

Now the tough part is knitting it all together into a "plug and play"
solution.  I've worked up an Excel sheet that gives most of numbers with the
desired frequency of interest.  This is a work in progress.

I've spent some time at the low signal site with the MGS experiment helix.  It

seems that there is about a 50% success in achieving a low SWR from builders.
Kraus mentions matching the typical 140 ohm impedance to the normal 50 ohm
line with the "tab on the conductor" method. This requires a ground screen
which the MGS helix does not use. It seems the adjustment to make the "tab"
method work is the distance between the conductor and the screen. Kraus
mentions that the tab may not be required if the space is very small.

Stay tuned....

Doug
kb4fem






From [e-mail] Sat Dec 21 12:35:37 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!newsfeed.concentric.net!news-master!voyager.cris.com!Insight
From: INSIGHT Services <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Help : 2m Yagi ?
Date: Wed, 11 Dec 1996 10:33:41 -0500
Organization: Concentric Internet Services
Lines: 14
Message-ID: <[e-mail]>
NNTP-Posting-Host: voyager.cris.com
Mime-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII

I wanted to build a 2 meter yagi but need some help with the length of the
legs. If anyone can suggest a starting length it would be appreciated.
Thanks.

---
Susan Driggers
Tech Plus try #2 in 3 weeks.
QTH EM85 ,
In the Mountains of Eastern Tennessee, USA
DX-394 with 100 foot Random Wire
Kenwood TS-520S with 35 foot Random Wire
Real radios glow in the dark !




From [e-mail] Sat Dec 21 12:35:38 1996
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From: "blazu" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Help : 2m Yagi ?
Date: 13 Dec 1996 23:56:35 GMT
Organization: Alpha.net -- Milwaukee, WI
Lines: 11
Message-ID: <01bbe951$20e93dc0$6ff02e9c@JBlaser>
References: <[e-mail]>
NNTP-Posting-Host: cresport12.phoenixnet.net
X-Newsreader: Microsoft Internet News 4.70.1155



INSIGHT Services <[e-mail]> wrote in article
<[e-mail]>...
> First time trying to answer to a group so I hope this works.  I dont know
exactly what type of yagi your looking to build so figured at the middle of
the 2 mtr band.  Don't know how many elements you would like but have some
figures for a 5 element.  If interested in more info please email me a
[e-mail].  I found a good shareware antenna program but
can't remember where I downloaded from.
Best 73's N0HD Bruce     IOWA


From [e-mail] Sat Dec 21 12:35:39 1996
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From: aor <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Help : 2m Yagi ?  ARRL Handbook
Date: Sun, 15 Dec 1996 18:52:39 -0500
Organization: gteais-org
Lines: 11
Message-ID: <[e-mail]>
References: <[e-mail]>
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Mime-Version: 1.0
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To: INSIGHT Services <[e-mail]>

There is an entire section in the ARRL Handbook, which depicts exactly
what you are looking for.  I modeled two antennas for our club, and then
built 44 of then in two meetings.

I also built one that is 34' long.  5 watts takes me a long way...

73 and good luck.  Stick with proven designs... such as the K1FO designs
and plans (full turn-key plans).

AL, NW2M
President, MARC Club


From [e-mail] Sat Dec 21 12:35:40 1996
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From: <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: HELP FOR WHF COLINEAR ANTENNA
Date: 19 Dec 1996 20:39:24 GMT
Organization: France Telecom Interactive
Lines: 12
Message-ID: <01bbedec$68a18060$[e-mail]>
NNTP-Posting-Host: yellow-dij-53.wanadoo.fr
X-Newsreader: Microsoft Internet News 4.70.1155

I research a plan to construct a vertical colinear VHF antenna .
Who can help me?
Thanks and 73's de F1GTM, Jacques .

--
Jacques RUTY
17 rue de Futigny
71330 ST GERMAIN DU BOIS
FRANCE

Email: [e-mail]
Packet: F1GTM @ F1TIV.FBFC.FRA.EU


From [e-mail] Sat Dec 21 12:35:41 1996
From: [e-mail] (Don Phelps)
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!mr.net!nntp.earthlink.net!bdt.com!miwok!infoway!don.phelps
Newsgroups: rec.radio.amateur.antenna
Subject: Help with top-loaded 80m
Message-ID: <[e-mail]>
Date: Fri, 20 Dec 1996 20:10:59 GMT
Distribution: world
Organization: The Infoway BBS [phone] 28,800 8-N-1
Lines: 51

Hi Ron,

My theory of proportion says that if you scale everything up by
10%, you should decrease the resonant point by 10%, ie. lower it
from 4.0 MHz to 3.6 MHz.
 Ma> I am in the process of building a top-loaded vertical for 80 meters,
 Ma> and am having trouble getting the antenna to resonate around 3.5 MHz.

 Ma> The vertical is 45ft high and is topped with a capacitance hat.

That means increase vetical height from 45 to 49.5 ft.

 Ma> The hat is made with 3 adjustable-length aluminum tubes clamped to the
 Ma> top of the vertical with muffler clamps; the tubes are 9ft long

Increase the hat from 9ft to 10 ft like you have.

 Ma> and are uniformly distributed like spokes on a wheel.  I have four
 Ma> elevated radials that are nearly a quarter wavelength in length.

Increase the radials by 10%.

 Ma> Measurements with a receiver noise bridge indicate that the reactive
 Ma> portion of the impedance is 0 and the resistive portion is 32 ohms
 Ma> around 4 MHz.

Well, you increased one of three dimensions, and didn't get much
result.  It should not have been enough, but I don't know why only 50kHz.

 Ma> Does my observed behaviour seem right, or is something amiss?  Should
 Ma> I increase the number of hat tubes?  Do you think I'd be better off
 Ma> converting the antenna to an inverted-L and not mess around with the
 Ma> tubes?

If you have enough strength to support all those hat tubes at 45ft,
why not just stick a smaller tapering aluminum tubing up to make it
67 ft high and forget the hat.  At least the vertical element would
radiate some.

Of course you will still have all the losses in the ground connection
you are working this against.  Why not just support the
top of an inverted V at 45 ft or higher.  That way you would not
have the losses in the ground connection.

Happy Holidays to you Ron!

Don, N6MCE.


... [e-mail]  1:125/104 POBox 9739 San Rafael,CA 94912
___ Blue Wave/386 v2.30 [NR]


From [e-mail] Sat Dec 21 12:35:42 1996
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From: [e-mail] (Ron Majewski)
Newsgroups: rec.radio.amateur.antenna
Subject: Help with top-loaded 80m vertical
Date: 19 Dec 1996 16:51:02 GMT
Organization: Environmental Research Institute of Michigan, Ann Arbor, Michigan
Lines: 39
Distribution: world
Message-ID: <[e-mail]>
NNTP-Posting-Host: spsd630a.erim.org


Hello to All,

I am in the process of building a top-loaded vertical for 80 meters,
and am having trouble getting the antenna to resonate around 3.5 MHz.

The vertical is 45ft high and is topped with a capacitance hat.
The hat is made with 3 adjustable-length aluminum tubes clamped to the
top of the vertical with muffler clamps; the tubes are 9ft long
and are uniformly distributed like spokes on a wheel.  I have four
elevated radials that are nearly a quarter wavelength in length.

Measurements with a receiver noise bridge indicate that the reactive
portion of the impedance is 0 and the resistive portion is 32 ohms
around 4 MHz.  My theory is that I need to increase the size of the
hat to drop the resonant frequency, so I made the hat tubes 10ft long.
The resonant frequency dropped 50 kHz, at best.  My expectation
was that I should have seen a bigger drop in the resonant frequency.

Does my observed behaviour seem right, or is something amiss?  Should
I increase the number of hat tubes?  Do you think I'd be better off
converting the antenna to an inverted-L and not mess around with the
tubes?

I'd appreciate any insights you might be able to offer me.

Thanks much and Happy Holidays to all!

73,

Ron (W8RU).
[e-mail]

--

Ron Majewski ([e-mail])

The Environmental Research Institute of Michigan



From [e-mail] Sat Dec 21 12:35:43 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Help with top-loaded 80m vertical
Date: 20 Dec 1996 05:52:56 GMT
Organization: DigiPhone Corporation, Bryan/College Station Texas 409-693-8885
Lines: 53
Message-ID: <59d9jo$[e-mail]>
References: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: dialup552.myriad.net
X-Newsreader: IBM NewsReader/2 2.0

In <[e-mail]>, [e-mail] (Ron
 Majewski) writes:
>
>Hello to All,
>
>I am in the process of building a top-loaded vertical for 80 meters,
>and am having trouble getting the antenna to resonate around 3.5 MHz.
>
>The vertical is 45ft high and is topped with a capacitance hat.
>The hat is made with 3 adjustable-length aluminum tubes clamped to the
>top of the vertical with muffler clamps; the tubes are 9ft long
>and are uniformly distributed like spokes on a wheel.  I have four
>elevated radials that are nearly a quarter wavelength in length.
>
>Measurements with a receiver noise bridge indicate that the reactive
>portion of the impedance is 0 and the resistive portion is 32 ohms
>around 4 MHz.  My theory is that I need to increase the size of the
>hat to drop the resonant frequency, so I made the hat tubes 10ft long.
>The resonant frequency dropped 50 kHz, at best.  My expectation
>was that I should have seen a bigger drop in the resonant frequency.
>
>Does my observed behaviour seem right, or is something amiss?  Should
>I increase the number of hat tubes?  Do you think I'd be better off
>converting the antenna to an inverted-L and not mess around with the
>tubes?
>
>I'd appreciate any insights you might be able to offer me.
>
>Thanks much and Happy Holidays to all!
>
>73,
>
>Ron (W8RU).
>[e-mail]
>
>--
>
>Ron Majewski ([e-mail])
>
>The Environmental Research Institute of Michigan
>

How are you feeding it?  Is it insulated at the base and the elevated radials
are, of course, under the base insulator?

Can you get up the 45 foot element to play with a tap point that could get
you to a folded monopole type affair???


//-----------------------------
Mike - W5WQN
[e-mail]
[e-mail]



From [e-mail] Sat Dec 21 12:35:45 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!ix.netcom.com!news
From: "Richard A. Seifert" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Help: Need Antenna for Large Window
Date: 16 Dec 1996 00:43:09 GMT
Organization: Netcom
Lines: 28
Message-ID: <01bbeaea$0fb3a960$52c3b8cd@#seifertr>
NNTP-Posting-Host: wbg-va2-18.ix.netcom.com
X-NETCOM-Date: Sun Dec 15  4:43:09 PM PST 1996
X-Newsreader: Microsoft Internet News 4.70.1155

Hello...I'm relatively new to amateur radio; I earned a tech no-code
license this summer and also passed the general (element 3B?) written exam.
 Presently, I'm studying 13 wpm code for upgrade.  Anticipating the
upgraded license and associated HF band privileges, I've decided to
purchase the IC-706 tomorrow morning!  I'll use it for listening to "real"
CW transmissions until I'm authorized to transmit, a time I fear due to my
severe antenna restrictions.  Anyway, here's my situation:

I live on the third floor of a high-rise apartment building with a North
face (DC area).  Building construction is brick (metal structure, metal
studs, concrete floor/ceiling, etc..)  In the room I want to put the radio,
I have a large window area (5' high x 9' wide--actually 3 windows, each 36"
wide, in an aluminum frame.)  The windows do not open.  I want to place
some kind of wire antenna in the window for the purpose of receiving on all
of the bands (2 - 30 and 50MHz).  Is this possible?  If so, how long would
the antenna need to be to receive on all bands of the radio?  Assuming it
can be done and the antenna needs to be long, can I do some kind of a
repeating "S" across the window?  How would I attach the wire to the coax
without spending money on a balun?  As you can see, I'm pretty
clueless...any help would be greatly appreciated.  Many thanks!

--

73
Rich, KB2ZMF
----------------------
[e-mail]



From [e-mail] Sat Dec 21 12:35:46 1996
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From: hershman <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: High Sierra Comments?
Date: Sat, 14 Dec 1996 20:50:48 -0500
Organization: Netcom
Lines: 2
Message-ID: <[e-mail]>
NNTP-Posting-Host: bos-ma10-06.ix.netcom.com
Mime-Version: 1.0
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X-NETCOM-Date: Sat Dec 14  7:55:22 PM CST 1996
X-Mailer: Mozilla 3.01Gold (Win95; U)

Looking at going mobile HF. Any comments about the High Sierra
Screwdriver Antenna will be appreciated.


From [e-mail] Sat Dec 21 12:35:47 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!arclight.uoregon.edu!worldnet.att.net!newsadm
From: Michael Perry <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.scanner
Subject: Re: How do you make a 43-45mhz ant??
Date: 14 Dec 1996 05:18:30 GMT
Organization: AT&T WorldNet Services
Lines: 7
Message-ID: <58tdb6$[e-mail]>
References: <58t5ko$[e-mail]>
NNTP-Posting-Host: 207.116.45.86
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 1.22ATT (Windows; U; 16bit)
To: [e-mail]
Xref: news1.epix.net rec.radio.amateur.antenna:32694 rec.radio.scanner:73113

Use a wire antennea with the coax going to the middle.  I know that grove
or EEB if I remember correctly, sells a "make your own antennea kit".  It
comes everything with the middle and insulated ends etc.  Also check a
bookstore on amateur antenneas (preferably ones from the ARRL) they give
you the formula to match Mhz and length-- which for 45 Mhz will be 8 feet
long (ball park figure);=)



From [e-mail] Sat Dec 21 12:35:48 1996
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From: [e-mail] (NiteCapt)
Newsgroups: rec.radio.amateur.antenna,rec.radio.scanner
Subject: How do you make a 43-45mhz ant??
Date: 14 Dec 1996 03:07:04 GMT
Organization: LI Net (Long Island Network)
Lines: 9
Message-ID: <58t5ko$[e-mail]>
NNTP-Posting-Host: lisuser73.li.net
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Xref: news1.epix.net rec.radio.amateur.antenna:32699 rec.radio.scanner:73123

I am interested in making an antenna that receives 43-45 mhz. Can anyone
suggest the proper length and the proper material to use for same? also,
how would one hook up the coax? would the shield also connect? Coax to
connect in center or at end?

I would appreciate any info you can give.

Thanx



From [e-mail] Sat Dec 21 12:35:49 1996
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From: [e-mail] (Doug D)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: How do you make a 43-45mhz ant??
Date: Sun, 15 Dec 1996 05:07:48 GMT
Organization: Doug's Personal Defense Products
Lines: 33
Distribution: World
Message-ID: <32b38611.2284477@199.190.65.4>
References: <58t5ko$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: s14.lrbcg.com
X-Newsreader: Forte Free Agent 1.1/32.230

A Dipole for 44 MHz (the middle frequency) would be a total
of 10 feet, 8 inches long and fed 5 feet, 3.8 inches from
either end.
You could use 14 guage wire, with or without insulation.

____________________      ____________________
                                        |     |
                                        |     |
                                        |     |
Center Conductor------------|     |-----------Braid


Doug





[e-mail] (NiteCapt) wrote:

>I am interested in making an antenna that receives 43-45 mhz. Can anyone
>suggest the proper length and the proper material to use for same? also,
>how would one hook up the coax? would the shield also connect? Coax to
>connect in center or at end?
>
>I would appreciate any info you can give.
>
>Thanx
>

--
Sandusky CB Club
http://user.aol.com/ralph234/cb-page/cbclub.htm


From [e-mail] Sat Dec 21 12:35:50 1996
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From: [e-mail] (Tom Cwikla)
Newsgroups: rec.radio.amateur.antenna,rec.radio.scanner
Subject: Re: How do you make a 43-45mhz ant??
Date: 15 Dec 96 20:32:05 GMT
Organization: The University of Manitoba
Lines: 35
Message-ID: <umcwikla.850681925@antares>
References: <58t5ko$[e-mail]>
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In <58t5ko$[e-mail]> [e-mail] (NiteCapt) writes:

>I am interested in making an antenna that receives 43-45 mhz. Can anyone
>suggest the proper length and the proper material to use for same? also,
>how would one hook up the coax? would the shield also connect? Coax to
>connect in center or at end?

I made one out of 2 X 4 studs and copper pipe from the hardware store.
Mounted it on top of the garage and its been working perfectly since summer.
It only has two elements but it outperforms the discone, hands down, every
time. The measurements are:
Driven element: 303 cm
Reflector:      347 cm
Spacing:        160 cm
The long spacing decreases gain slightly in the 46 MHz range but gives it
wider coverage so it works better at 43 and at 49. I used a program called
"YagiMax" to tweak the dimensions. It should be available at ftp.cdrom.com
in the ham radio directory. It allows you specify the element lengths and
spacings and gives you all sorts or graphs like gain vs. frequency,
front-to-back ratio, Smith charts and so on.

As for construction, use a 2X4 for the boom, and either aluminum or copper
tube for the elements. Aluminum is lighter but more expensive. For
connecting the coax, a 75 ohm to 50 ohm matching transformer would be best
but these are hard to find and it is generally easier to use some type of
matching on the driven element itself, but I have no idea how to calcualte
the dimensions of the hairpin. I just connected the coax directly to the
driven element, the shield goes to the left part of the element and the
centre to the right part. Make sure the left and right parts are separated
by about 1 inch or so.

Next summer, I think I'll try to make a quad antenna from PVC pipe and
speaker wire, hehe.

--Tom.


From [e-mail] Sat Dec 21 12:35:51 1996
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From: [e-mail] (tyler)
Newsgroups: rec.radio.amateur.antenna,rec.radio.scanner
Subject: Re: How do you make a 43-45mhz ant??
Date: 20 Dec 1996 22:13:15 GMT
Organization: Your Organization
Lines: 12
Distribution: world
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snip----
>
>Next summer, I think I'll try to make a quad antenna from PVC pipe and
>speaker wire, hehe.
>
>--Tom.

Ohhhhhhh... I built a 2 meter 4 element quad with #12 house wire and pvc pipe.

 It worked ok, but the pvc pipe doesn't even hold it's own weight!  It's
pretty useless unless you run a dowel rod down the middle of it like I did.
Tyler



From [e-mail] Sat Dec 21 12:35:52 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Indoor AM/FM Antenna
Date: 19 Dec 1996 13:11:53 GMT
Organization: AOL http://www.aol.com
Lines: 24
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References: <[e-mail]>
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In article <[e-mail]>, [e-mail]
(Michael Grubbs) writes:

>I go to college basically "in the middle of nowhere" and was wondering
>about the effectiveness of these indoor AM/FM antennas. I saw one
>called the Terk "Pi" and wondered if anyone has had experience - good
>or bad - with it.
>
>Thanks,


I can't imagine an indoor FM antenna even with a well designed rf
amplifier being particularly effective.  Of course, I've been wrong
before.  AM reception, I know, you're in college, why would you want to
listen to AM with no music worth listening to, can be improved in several
ways, whether it's the Select A Tenna, which is really a coil and a
capacitor, which does improve both sensitivity and selectivity on AM
reception, or attaching a long wire inductively or directly to the
terminals for AM antennas.

Your best bet of course is to talk your college into setting up an Master
Antenna system with jacks in every dorm room, but that gets expensive, but
an outside antenna is about the only way I know that's practically a sure
fire guaranteed method of producing better FM reception.


From [e-mail] Sat Dec 21 12:35:53 1996
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From: [e-mail] (Jonathan Helis)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: indoor antenna
Date: Thu, 19 Dec 1996 01:25:50 GMT
Organization: InterSurf Online, Inc.
Lines: 17
Message-ID: <59a64k$[e-mail]>
References: <01bbea39$eaf6d120$[e-mail]>
NNTP-Posting-Host: ts1-13.dialup.intersurf.com
X-Newsreader: Forte Free Agent 1.0.82

"ETHAN HUNT" <[e-mail]> wrote:

>help need help with indoor antenna for shortwave radio reception

Do you have an attic?  I've used a wire of 60 feet long in the attic
in the past, and it worked just fine.  Using a Heathkit SW717 and a
Kenwood TS-140S and such an antenna, I've heard all over the world,
even transmitted through it.


73,

Jonathan Helis, KB5IAV
Baton Rouge, Lousiana, USA

[e-mail]



From [e-mail] Sat Dec 21 12:35:54 1996
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From: Avatar <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Inexpensive guy wire insulators ???
Date: Thu, 19 Dec 1996 17:38:49 -0800
Organization: Front Range Internet, Inc.
Lines: 21
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References: <[e-mail]>
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Dave Hand wrote:
>
> I have an 80 foot Rohn 25 tower with a TH-7 tribander that I intend to
> use as a 160 verticle.
> I am using 3 levels of guying and want to break up the guy wires. Guys
> are surplus 1/4  EHS galvanized from CATV trash. Any good sugestions
> on (cheep) insulators??
>
> Dave Hand WB4HYP
> [e-mail]

I don't have a cheap solution. I can recommend Phillystran (SP?) guy
cable (it is made with Arimed fibers inside a jacket). I have a 60' Rohn
25G tower with a KLM LPDA. That combination just happens to resonate on
160M! The installation has been in place since the early 80s with no
guying problems.

Regards,
W0MAY
Dave



From [e-mail] Sat Dec 21 12:35:55 1996
Newsgroups: rec.radio.amateur.antenna
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!nntp.uio.no!in1.nntp.cais.net!NEWS1!not-for-mail
From: Bob Lewis <[e-mail]>
Subject: Re: Inexpensive guy wire insulators ???
Message-ID: <[e-mail]>
Date: Fri, 20 Dec 1996 08:21:14 -0500
References: <[e-mail]>
Reply-To: [e-mail]
Organization: AA4PB
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Dave Hand wrote:
>
> I have an 80 foot Rohn 25 tower with a TH-7 tribander that I intend to
> use as a 160 verticle.
> I am using 3 levels of guying and want to break up the guy wires. Guys
> are surplus 1/4  EHS galvanized from CATV trash. Any good sugestions
> on (cheep) insulators??
>
> Dave Hand WB4HYP
> [e-mail]
I remember seeing an article in 1993 QST which said that computer
modeling and "on the air performance tests" indicate the breaking up the
guy wires is not worth the effort. I use non-conductive guys so I have
no idea if this is so or not. It might be worth looking into.



From [e-mail] Sat Dec 21 12:35:56 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Inexpensive guy wire insulators ???
Date: 20 Dec 1996 20:14:09 GMT
Organization: DigiPhone Corporation, Bryan/College Station Texas 409-693-8885
Lines: 68
Message-ID: <59es2h$[e-mail]>
References: <[e-mail]> <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: usr14s0.myriad.net
X-Newsreader: IBM NewsReader/2 2.0

In <[e-mail]>, Bob Lewis <[e-mail]> writes:
>Dave Hand wrote:
>>
>> I have an 80 foot Rohn 25 tower with a TH-7 tribander that I intend to
>> use as a 160 verticle.
>> I am using 3 levels of guying and want to break up the guy wires. Guys
>> are surplus 1/4  EHS galvanized from CATV trash. Any good sugestions
>> on (cheep) insulators??
>>
>> Dave Hand WB4HYP
>> [e-mail]
>I remember seeing an article in 1993 QST which said that computer
>modeling and "on the air performance tests" indicate the breaking up the
>guy wires is not worth the effort. I use non-conductive guys so I have
>no idea if this is so or not. It might be worth looking into.

Not at all true in my practical experience.  WA5TOC in Houston showed me
the curious effect on his two element 40 meter rotary array at 90 feet
above ground mounted on a tower extension above a metal building.  As
we rotated the array, the SWR went crazy, bouncing up and down all over
the place depending on the direction it faced!

He's a graduate EE and loves to play with antennae.  I'm not a EE, but
have spent a long time in the broadcast engineering game as one of those
other kinds of electrical waifs.   We both looked at each other and grinned.

Out came the insulators.   The guy wires got split into very planned sized
chunks.

Problem solved.

You're mileage may vary, depending on other things that also can interact
with the whole mess, like nearby metal roofs and buildings.

I know you just asked what time it was, but I can't resist telling you
how to build an alarm clock!    :)

There is a whole trade going on now in cleaning up all the pattern distortion
showing up in the broadcast directional array stations that has been caused
by all these new cell phone tower sites popping up everywhere!   It seems
that nobody checked to figure out if, at the heights they are, they are close
enough to skew that pattern!   They seemingly do!


In our case at WTAW when they built the new Hilton hotel about three miles
away from the directional array, we took a complaint to the FCC that our
pattern was skew and varying wildly at night!  Everyone, including the real
consultant Lawrence Behr over on the east coast was stymied!  Nothing was
wrong!

Oh yeah?  In the section of town where the complaint arose, over by the new
Hilton site, one day one of our guys noticed that the Texas Stork, the big
construction crane, had a compressor hanging off the cable way out on the
end of the boom and it was swaying in a strong wind.

You guessed it.  The pattern was wavering in and out with the swaying of
the cable and the dead weight!

By turning the crane to a certain direction and adjusting the line length for
the cable and the dead weight, the problem was cured.  That is out at the
three mile range on 1150Khz....

And you think breaking up guy wires ain't needed?????

//-----------------------------
Mike - W5WQN
[e-mail]
[e-mail]



From [e-mail] Sat Dec 21 12:35:57 1996
Path: news1.epix.net!news3.epix.net!uunet!in2.uu.net!205.252.116.190!feed1.news.erols.com!howland.erols.net!news.starnet.net!thepit.trucom.com!usenet
From: [e-mail] (Marty Albert)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Inexpensive guy wire insulators ???
Date: Fri, 20 Dec 1996 05:59:20 GMT
Organization: TruCom Internet Services
Lines: 34
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: dialup8.trucom.com
X-Newsreader: Forte Free Agent 1.1/32.230

On Thu, 19 Dec 1996 09:18:16 -0500, Dave Hand <[e-mail]>
wrote:

>I have an 80 foot Rohn 25 tower with a TH-7 tribander that I intend to
>use as a 160 verticle.
>I am using 3 levels of guying and want to break up the guy wires. Guys
>are surplus 1/4  EHS galvanized from CATV trash. Any good sugestions
>on (cheep) insulators??
>
>Dave Hand WB4HYP
>[e-mail]

Dave:

The cheap insulators are false economy.... Think about it...

If an insulator fails, your tower is compromised.

I would use the best insulators that I can get.

Take care & 73




Marty Albert - [e-mail]
Amateur Radio: KC6UFM@KC6UFM.#SEMO.MO.USA.NOAM

Heartland Internet Services

*******************************************
Interested in Amateur Radio?
http://www.trucom.com/ppages/marty
*******************************************


From [e-mail] Sat Dec 21 12:35:59 1996
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From: [e-mail] (TGonif)
Newsgroups: rec.radio.amateur.antenna
Subject: Is it possible to extend a telescoping antenna???
Date: 17 Dec 1996 20:20:02 -0700
Organization: Primenet Services for the Internet
Lines: 35
Message-ID: <[e-mail]>
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Hi there,

My work has recently moved into a new office building which is constructed
of glass and steel.  My cube faces basically southish, toward the beach.

Anyway, I just bought a portable boombox ("ghetto blaster") radio, which
has a telescoping antenna coming out of it.  The FM reception is horrible!!
We have to elevate the unit to place the antenna 100% in front of the
window and angle it just so, otherwise the static is horrendous.

So my question is this: is it possible to mount a dipole antenna in the
window and just connect the leads to the telescoping antenna?  There are no
300 or 75 ohm antenna inputs in the unit; just that built in antenna.

There's a screw that holds the antenna in; if I remove that and take out
the antenna, do you think there's a chance that I'll find two 300 ohm wires
there? (I have no idea how this kind of antenna works..)  One of the other
articles in this newsgroup mentioned using security system tape on the
glass -- would that work here?  Or a separate powered antenna?

I guess what I'm asking is is there a way to connect a better antenna to
this device.  We're about 5 miles from the beach, so there may be a chance
that most of the signals are coming from the other side of the building, in
which case it looks like we're out of luck here.

I was even thinking of poking a small hole through the rubber insulation
around the window pane and sticking a small wire through for a few inches,
then wrapping that around my telescoping antenna. ??

Any ideas???  Any help would really be appreciated.

Thanks!


Jeff


From [e-mail] Sat Dec 21 12:36:00 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!worldnet.att.net!newsadm
From: George Darrow <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Long wire antenna
Date: 14 Dec 1996 03:38:37 GMT
Organization: AT&T WorldNet Services
Lines: 5
Message-ID: <58t7ft$[e-mail]>
NNTP-Posting-Host: 207.147.120.206
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Looking for info on using coax to connect a long wire antenna. Should the
shield be grounded outside? Any help appreciated.
George - KE4DXM



From [e-mail] Sat Dec 21 12:36:01 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Long wire antenna
Date: 14 Dec 1996 14:30:52 GMT
Organization: AOL http://www.aol.com
Lines: 14
Message-ID: <[e-mail]>
References: <58t7ft$[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]
X-Newsreader: AOL Offline Reader

In article <58t7ft$[e-mail]>, George Darrow
<[e-mail]> writes:

>Looking for info on using coax to connect a long wire antenna. Should the

>shield be grounded outside? Any help appreciated.
>George - KE4DXM
>
>

If you don't ground the coax shield really well at the antenna end, the
shield for all practical purposes might as well not even be there.

73 Tom


From [e-mail] Sat Dec 21 12:36:02 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!news.sprintlink.net!news-peer.sprintlink.net!worldnet.att.net!uunet!in3.uu.net!192.80.63.252!delphi.com!usenet
From: "Cecil A. Moore" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Long wire antenna
Date: Sun, 15 Dec 1996 22:16:25 -0700
Organization: Delphi Internet Services Corporation
Lines: 10
Message-ID: <[e-mail]>
References: <58t7ft$[e-mail]> <[e-mail]>
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[e-mail] wrote:
> If you don't ground the coax shield really well at the antenna end, the
> shield for all practical purposes might as well not even be there.

Hi Tom, you didn't say how to achieve a ground 40ft up in the air.
If the coax is grounded an electrical half-wavelength back from
the feedpoint, does that give a reasonable ground at the antenna
at one frequency?

73, Cecil, W6RCA, OOTC


From [e-mail] Sat Dec 21 12:36:03 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Long wire antenna
Date: Mon, 16 DEC 96 01:10:15 -0500
Organization: Delphi ([e-mail] email, 800-695-4005 voice)
Lines: 3
Message-ID: <[e-mail]>
References: <58t7ft$[e-mail]>
NNTP-Posting-Host: bos1d.delphi.com
X-To: George Darrow <[e-mail]>

Please go into more detail on the long wire antenna. Depending on how it is
configured (I assume this is for transmitting) you might have a problem.
Coax is a low impedance feedline and longwires can be very high impedance.


From [e-mail] Sat Dec 21 12:36:04 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!mindspring!news.bbnplanet.com!cpk-news-hub1.bbnplanet.com!portc02.blue.aol.com!audrey01.news.aol.com!not-for-mail
From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Long wire antenna
Date: 16 Dec 1996 18:02:49 GMT
Organization: AOL http://www.aol.com
Lines: 26
Message-ID: <[e-mail]>
References: <[e-mail]>
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X-Admin: [e-mail]
X-Newsreader: AOL Offline Reader

In article <[e-mail]>, "Cecil A. Moore"
<[e-mail]> writes:

>
>Hi Tom, you didn't say how to achieve a ground 40ft up in the air.
>If the coax is grounded an electrical half-wavelength back from
>the feedpoint, does that give a reasonable ground at the antenna
>at one frequency?

It is impossible to eliminate feedline radiation with a zepp or longwire
(or J-pole) unless some form of counterpoise is placed at the antenna to
feedpoint connection.

Unless the any coaxial or balanced feedline line carries equal and
opposite currents in each conductor it will radiate.

Some books on Beverage antennas wrong tell people that a piece of coax
eliminates radiation from the vertical drop wire of a Beverage (which is
really a longwire), but that is untrue. I can't think of a way to
eliminate radiation without an elevated counterpoise or elevated ground
system at the height of the antenna.

Armond has a good point also about the impedance of the LW. The SWR very
likely will also be a problem.

73 Tom


From [e-mail] Sat Dec 21 12:36:05 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!newsxfer.itd.umich.edu!news.cic.net!feeder.chicago.cic.net!news.uiowa.edu!news
From: "William E. Sabin" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Long wire antenna
Date: Mon, 16 Dec 1996 15:02:41 -0800
Organization: none
Lines: 15
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
NNTP-Posting-Host: ppp-107.cedar-rapids.lib.ia.us
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[e-mail] wrote:
>
> It is impossible to eliminate feedline radiation with a zepp or longwire
> (or J-pole) unless some form of counterpoise is placed at the antenna to
> feedpoint connection.
>
>

Bill Orr W6SAI had an article in CQ Mag several months ago. He reported
some field strength simulations on some Zepp antennas and found that the
feedline radiation (vertical) was much less than was expected. Not
perfect, of course, but at least 20 dB less than the flat top radiation
(horizontal). The feedline should not be self-resonant.

Bill W0IYH


From [e-mail] Sat Dec 21 12:36:05 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!portc02.blue.aol.com!audrey01.news.aol.com!not-for-mail
From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Long wire antenna
Date: 17 Dec 1996 16:36:26 GMT
Organization: AOL http://www.aol.com
Lines: 34
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]
X-Newsreader: AOL Offline Reader

In article <[e-mail]>, "William E. Sabin"
<[e-mail]> writes:

>
>Bill Orr W6SAI had an article in CQ Mag several months ago. He reported
>some field strength simulations on some Zepp antennas and found that the
>feedline radiation (vertical) was much less than was expected. Not
>perfect, of course, but at least 20 dB less than the flat top radiation
>(horizontal). The feedline should not be self-resonant.
>
>Bill W0IYH

Hi Bill,

One problem. It was based on a perfect model.

Here is the criteria to achieve that result:

1.) A infinite impedance balun at the bottom, no coupling at all via
capacitance,

2.) An exact 1/4 wl resonant feeder

3.) An exact 1/2 wl resonant flat top

4.) Nothing near the antenna

5.) A very thin antenna compared to the feedline

Violate ANY of these criteria, and the 20 dB estimate will disappear very
fast. Feeding an unbalanced antenna with a balanced line is asking for
headaches.

73 Tom


From [e-mail] Sat Dec 21 12:36:06 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!news.sprintlink.net!news-pull.sprintlink.net!news.sprintlink.net!news-peer.sprintlink.net!howland.erols.net!newsfeed.internetmci.com!metro.atlanta.com!east1.hlc.net!news
From: [e-mail] (Barry Anderson)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Long wire antenna
Date: Wed, 18 Dec 1996 12:36:01 -0500
Organization: Anderson Desktop Publishing
Lines: 18
Message-ID: <[e-mail]>
References: <58t7ft$[e-mail]>
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In article <58t7ft$[e-mail]>,
[e-mail] says...
>
> Looking for info on using coax to connect a long wire antenna. Should the
> shield be grounded outside? Any help appreciated.
> George - KE4DXM
>
>
George ...

    My experiance with long wire antennae is NOT to feed it with coax.
The capacitance to ground added by the feedline hoses up everything and
the coax also introduces losses into the system. Bring the long wire
right into your tuner to feed it. Don't use coax feeds.
--
Barry Anderson K3SUI
Frederick, MD.
[e-mail]


From [e-mail] Sat Dec 21 12:36:07 1996
From: [e-mail] (mark morgan)
Newsgroups: rec.radio.amateur.antenna
Subject: LOTS OF HAM STUFF 4 SALE - 4salelis (1/1)
Date: Tue, 17 Dec 1996 10:53:27 GMT
X-Newsreader: Forte Free Agent 1.0.82
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Message-ID: <[e-mail]>
Lines: 34
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!su-news-hub1.bbnplanet.com!news.bbnplanet.com!cpk-news-hub1.bbnplanet.com!cpk-news-feed4.bbnplanet.com!news.eagnet.com!

begin 644 4salelis
M=&\@=VAO;2!I="!M87D@8V]N8V5R;BP-"@T*=&AE<V4@:71E;7,@87)E(&9O
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M96YT<GDL(&1E<VL@;6EC+"!V;VEC92!M;V0L(&5X=&5N9&5D('AM:70N("`@
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M,CDU+C`P#0IK86T@=&YC('=I=&@@<&%C=&]R(&)U="!N;W0@9RUT;W(@("`@
M("`@("`@("`@("`@("`@("`@("`@("`@("`@("`@("`@("`@("`@("`@("`Q
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M,"XP,`T*<&%C+6-O;2!H86YD:2!P86-K970@("`@("`@("`@("`@("`@("`@
M("`@("`@("`@("`@("`@("`@("`@("`@("`@("`@("`@("`@("`@("`@,3`P
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M#0IT:"TV(&AF(&)E96T@86YT96YN82!I;B!G;V]D(&-O;F1I=&EO;BX@("`@
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M#0IA;F0@=&AA=',@86QL(&9O<B!N;W<N("!A;GEO;F4@8V%N(&-O;G1A8W0@
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/#0IT:&%N:W,L#0H-"@T*
`
end


From [e-mail] Sat Dec 21 12:36:08 1996
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!usenet.eel.ufl.edu!warwick!lyra.csx.cam.ac.uk!news.ox.ac.uk!news
From: Rich <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Magnetic field strength due to RF
Date: 12 Dec 1996 10:30:41 GMT
Organization: Physical Chemistry Laboratory, South Parks Road, Oxford OX1 3QZ
Lines: 19
Message-ID: <58omsh$[e-mail]>
References: <58omk0$[e-mail]> <58omlu$[e-mail]>
NNTP-Posting-Host: lucy.pcl.ox.ac.uk
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Gotta get a hang of this news lark!!

I am a Physical Chemist, doing some experiments with radio frequency (20-40MHz
)
on a tuned coil, and need to know the magnetic field strength at the centre of
my coils. Is there any "easy" way to measure/calculate this??

If you know the answer can you email me as I don't get much chance to read the
newsgroups. Either of the addresses below is OK.

Thanks for your time,

Richard Jackson
--
Physical & Theoretical       | Tel: (UK) 01865 275417
       Chemistry Department  | Fax: (UK) 01865 275410
South Parks Road             | E-Mail:- [e-mail]
Oxford   OX1 3QZ             | &  [e-mail]
ENGLAND



From [e-mail] Sat Dec 21 12:36:09 1996
Path: news1.epix.net!news3.epix.net!uunet!in3.uu.net!205.252.116.190!feed1.news.erols.com!howland.erols.net!news-peer.gsl.net!news.gsl.net!usenet.eel.ufl.edu!warwick!lyra.csx.cam.ac.uk!news.ox.ac.uk!news
From: Rich <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Magnetic field strength due to RF
Date: 12 Dec 1996 10:27:10 GMT
Organization: Physical Chemistry Laboratory, South Parks Road, Oxford OX1 3QZ
Lines: 10
Message-ID: <58omlu$[e-mail]>
References: <58omk0$[e-mail]>
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Oooops, forgot a subject!!!


--
Physical & Theoretical       | Tel: (UK) 01865 275417
       Chemistry Department  | Fax: (UK) 01865 275410
South Parks Road             | E-Mail:- [e-mail]
Oxford   OX1 3QZ             | &  [e-mail]
ENGLAND



From [e-mail] Sat Dec 21 12:36:10 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.net!www.nntp.primenet.com!nntp.primenet.com!newspump.sol.net!howland.erols.net!feed1.news.erols.com!news.bbnplanet.com!cpk-news-hub1.bbnplanet.com!newsfeed.internetmci.com!raven.eva.net!default
From: [e-mail] (Julian Rhinehart)
Newsgroups: rec.radio.amateur.antenna
Subject: MFJ 1798 Vertical Antenna
Date: Fri, 20 Dec 96 17:47:32 GMT
Organization: Access Nevada Inc.
Lines: 10
Message-ID: <59ejfk$[e-mail]>
NNTP-Posting-Host: 206.29.24.31
X-Newsreader: News Xpress 2.0 Beta #0

Does anyone have information on the MFJ 1798 Vertical Antenna, 80M-2M?

Tnx, Julian, KD7QY

Julian Rhinehart
1127 Seno Court
Boulder City, NV 89005
[phone]
[phone] (fax)
[e-mail]


From [e-mail] Sat Dec 21 12:36:11 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!dns.aol2.com!newsgw.mica.net!news2.acs.oakland.edu!nntp.coast.net!howland.erols.net!www.nntp.primenet.com!nntp.primenet.com!ix.netcom.com!news
From: hershman <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: MFJ 40 meter isoloop?
Date: Fri, 13 Dec 1996 12:04:33 -0500
Organization: Netcom
Lines: 3
Message-ID: <[e-mail]>
NNTP-Posting-Host: bos-ma7-21.ix.netcom.com
Mime-Version: 1.0
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Content-Transfer-Encoding: 7bit
X-NETCOM-Date: Fri Dec 13 11:09:00 AM CST 1996
X-Mailer: Mozilla 3.01Gold (Win95; U)

saw that MFJ has a new isoloop antenna that covers 7 mhz thru 21 mhz.
Anyone out there have any experience with this product or the regular
10-30 mhz SUPERLOOP antenna?


From [e-mail] Sat Dec 21 12:36:12 1996
Path: news1.epix.net!news3.epix.net!uunet!in1.uu.net!204.71.1.48!newsfeed.internetmci.com!news.netusa1.net!usenet
From: rlwilms <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: MFJ 40 meter isoloop?
Date: Sun, 15 Dec 1996 11:25:00 -0500
Organization: To know Love is All There Is; is All There Is to know.
Lines: 22
Message-ID: <[e-mail]>
References: <[e-mail]>
Reply-To: [e-mail]
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I have been running a MFJ 1786 SuperLoop for a few years. I have it
mounted above my garage on a tripod and extended above a counterpoise.
It has been very good (Within the power limits.) for transmitting and
receiving. The tuning is very close on all bands, which is good for
quieting receiving noise, but a bother on transmitting. Fortuantely the
tuner system works well, most of the time. There in lies the rub. After
a year or so the tuner mechanism started to stick on the lower (10MHz)
settings if I let it bottom out there. It would usually return in an
hour or so, but it was useless during that time. That was the only
problem.

I talked with some MFJ people at a hamfest about the new model. They
said it was the same size loop with a different capacitor, and probably
a different size housing. As the low freq end of this design has the
lowest efficeincy, I wonder if this is going to effect the operation.
Just a thought. I would have liked to see them use a larger loop.

Over all I am pleased with the loop (except as noted above) and it works
very well for such a small package. IT is priced like a full size
vertical however, so if size makes the difference, go for it.

Caviet Emptor...


From [e-mail] Sat Dec 21 12:36:13 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!uwm.edu!math.ohio-state.edu!howland.erols.net!dciteleport.com!worldnet.att.net!newsxfer2.itd.umich.edu!news.sprintlink.net!news-chi-8.sprintlink.net!bartlett.televar.com!news
From: "JA Glasscock" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: MFJ-1754 wattage capacity
Date: 16 Dec 1996 01:25:30 GMT
Organization: Private Enterprise
Lines: 6
Message-ID: <01bbeaef$617288c0$198a08d0@glasscock>
NNTP-Posting-Host: prosseruser023.televar.com
X-Newsreader: Microsoft Internet News 4.70.1155

Does any body know what the wattage capacity of the MFJ-1754 is? I lost the
instructions & I can't remember.

Thanks.

KC7QHH


From [e-mail] Sat Dec 21 12:36:14 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!newspump.sol.net!howland.erols.net!worldnet.att.net!uunet!in3.uu.net!199.249.160.130!news.csranet.com!usenet
From: Hal Rosser W4PMJ <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.misc
Subject: MFJ259 antenna analyzer
Date: Thu, 19 Dec 1996 14:27:08 -0800
Organization: CSRA Internet Services
Lines: 10
Message-ID: <[e-mail]>
NNTP-Posting-Host: line048.csranet.com
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Xref: news1.epix.net rec.radio.amateur.antenna:32929 rec.radio.amateur.misc:121141

I just bought one of these jewels.
I'm sure there are folks out there with
helpful hints on using this to full advantage.
  If you are one of those with helpful tidbits
on using this MFJ 259, I would appreciate the info.
 (Yes, I do have the manual, but looking for
creative uses and applications)
Thanks and 73'S de W4PMJ
HAL
[e-mail]


From [e-mail] Sat Dec 21 12:36:15 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!agate!usenet
From: Costas Spanos <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.misc
Subject: Re: MFJ259 antenna analyzer
Date: Thu, 19 Dec 1996 14:04:22 -0800
Organization: University of California, Berkeley
Lines: 15
Message-ID: <[e-mail]>
References: <[e-mail]>
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To: Hal Rosser W4PMJ <[e-mail]>
Xref: news1.epix.net rec.radio.amateur.antenna:32939 rec.radio.amateur.misc:121150

The 259 is great, but I did find out one thing using it: Try to do so
when the band is quiet. The 259 sends a small signal to the antenna and
is looking for reflected power. This signal level is very small, and
easily comparable with strong signals that your antenna might be
receiving at the time. Since the front end of the 259 is not very
selective, strong signals in nearby frequencies might also influence
the measurements.

I found out the hard way that measuring the 10m resonance on my antenna
is impossible when the CBers in my area are running serious power, for
example. When that happens, the SWR appears much greater than it is.

regards

Costas


From [e-mail] Sat Dec 21 12:36:15 1996
Path: news1.epix.net!news3.epix.net!uunet!in3.uu.net!204.253.4.5!news.bridge.net!news.magg.net!news
From: "Dale R. Parfitt" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.misc
Subject: Re: MFJ259 antenna analyzer
Date: Thu, 19 Dec 1996 18:57:47 -0500
Organization: PAR Electronics
Lines: 14
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: wpb-102.magg.net
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 2.02 (Win95; I)
To: Hal Rosser W4PMJ <[e-mail]>
Xref: news1.epix.net rec.radio.amateur.antenna:32951 rec.radio.amateur.misc:121170

Hal Rosser W4PMJ wrote:
>
> I just bought one of these jewels.
> I'm sure there are folks out there with
> helpful hints on using this to full advantage.
>   If you are one of those with helpful tidbits
> on using this MFJ 259, I would appreciate the info.
>  (Yes, I do have the manual, but looking for
> creative uses and applications)
> Thanks and 73'S de W4PMJ
> HAL
> [e-mail] in QST a couple of months back for just such an art
icle.

Dale W4OP


From [e-mail] Sat Dec 21 12:36:17 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!enews.sgi.com!news.sgi.com!swrinde!ihnp4.ucsd.edu!news1.ucsd.edu!news-mail-gateway
From: [e-mail] (Guido Bressan)
Newsgroups: rec.radio.amateur.antenna
Subject: MININEC command syntax.
Date: 12 Dec 96 15:57:26 GMT
Organization: ITALTEL s.p.a.
Lines: 31
Sender: [e-mail]
Message-ID: <[e-mail]>
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]

I have downloaded MININEC3.ZIP from an FTP server, with the intention of
employing it in the design of the 50 MHz log-periodic antenna I would
like to build (I am a radio amateur with call IW2CUH). The procedure I
am trying to follow is to calculate the antenna parts with LPCAD (a
freeware log-periodic antenna design kit by Telex Communications, easily
retrievable from many FTP servers) and then to calculate the radiated
pattern and the impedance with MININEC3.

By now, I have run the program interactively on my PC and I have soon
found that typing in all the data at every run (for a log-periodic it
can be a very long and error-prone task) is not at all practical. I
have discovered that it is possible to supply MININEC3 with its input
data by means of a proper syntax (of course), placed in a plain ASCII
file and translated in the program's internal coding by means of a
suitable preprocessor.

I have found some examples that gave me some rough ideas on the syntax
to employ, though utterly inadequate for an acceptably "smart" use. For
example, I could understand that "CM" is a comment line, "CE" is the
final one in a sequence of comment lines, "GW" is the description of a
"wire" and a few more. However, I could not find a detailed description
of the single fields of those commands and no description at all for
many others.

So, I started searching around on the Web for some kind of
documentation, but, to my disappointment, I have found none at all,
neither official nor unofficial.

Can you help me?

Guido Bressan IW2CUH in JN45RQ


From [e-mail] Sat Dec 21 12:36:18 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!news.sprintlink.net!news-pull.sprintlink.net!news.sprintlink.net!news-peer.sprintlink.net!EU.net!usenet2.news.uk.psi.net!uknet!usenet1.news.uk.psi.net!uknet!insnet.net!news.insnet.net!nntp.onyx.net!usenet
From: [e-mail] (Paul Mooney)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: MININEC command syntax.
Date: Thu, 12 Dec 1996 21:45:33 GMT
Organization: ONYX Internet
Lines: 28
Message-ID: <58pukv$[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: r03-51.octacon.co.uk
X-Newsreader: Forte Free Agent 1.0.82

[e-mail] (Guido Bressan) wrote:

>I have downloaded MININEC3.ZIP from an FTP server, with the intention of
>employing it in the design of the 50 MHz log-periodic antenna I would
>like to build (I am a radio amateur with call IW2CUH).

>I have found some examples that gave me some rough ideas on the syntax
>to employ, though utterly inadequate for an acceptably "smart" use. For
>example, I could understand that "CM" is a comment line, "CE" is the
>final one in a sequence of comment lines, "GW" is the description of a
>"wire" and a few more. However, I could not find a detailed description
>of the single fields of those commands and no description at all for
>many others.


>Guido Bressan IW2CUH in JN45RQ

Hi Guido,

try and get hold of a copy of NEC4WIN, which appears to be an
adaptation for windows use. It's very slow but its help file contains
a list of commands.

Also, the December 1995 issue of Radcom (the RSGB Journal) contains
details of a 6M log periodic Yagi, is this of any use

Paul G7SPV



From [e-mail] Sat Dec 21 12:36:19 1996
Path: news1.epix.net!news3.epix.net!uunet!in3.uu.net!205.139.108.2!news.spiritone.com!max1-43
From: [e-mail] (Roy Lewallen)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: MININEC command syntax.
Date: Sat, 14 Dec 96 08:10:41 GMT
Organization: EZNEC Antenna Software
Lines: 24
Message-ID: <58tn2j$[e-mail]>
References: <[e-mail]> <58pukv$[e-mail]>
NNTP-Posting-Host: max1-43.spiritone.com
X-Newsreader: News Xpress Version 1.0 Beta #3

In article <58pukv$[e-mail]>,
   [e-mail] (Paul Mooney) wrote:
>[e-mail] (Guido Bressan) wrote:

>I have downloaded MININEC3.ZIP from an FTP server, with the intention of
>employing it in the design of the 50 MHz log-periodic antenna I would
>like to build (I am a radio amateur with call IW2CUH).

>I have found some examples that gave me some rough ideas on the syntax
>to employ, though utterly inadequate for an acceptably "smart" use. For
>example, I could understand that "CM" is a comment line, "CE" is the
>final one in a sequence of comment lines, "GW" is the description of a
>"wire" and a few more. However, I could not find a detailed description
>of the single fields of those commands and no description at all for
>many others.

This is the interface for NEC-2, not MININEC. I believe that an on-line
NEC-2 manual is available via a link from

  http://sanjose.nu.edu:2777/~randerso/nec.html

There may be some information there on using MININEC, also.

Roy Lewallen, W7EL


From [e-mail] Sat Dec 21 12:36:20 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: mobile
Date: 15 Dec 96 00:08:34 GMT
Organization: ucsd usenet gateway
Lines: 3
Message-ID: <[e-mail]>
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]

http://ourworld.compuserve.com/homepages/feb7aw/

check out this site


From [e-mail] Sat Dec 21 12:36:21 1996
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From: [e-mail] (Dick Flanagan)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: mobile
Date: Sat, 14 Dec 1996 20:45:31 -0800
Organization: Libelle Productions, Inc., Minden, Nevada USA
Lines: 13
Distribution: world
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References: <[e-mail]>
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In article <[e-mail]>, [e-mail] wrote:

>http://ourworld.compuserve.com/homepages/feb7aw/
>
>check out this site

What this brief message fails to mention is this link is to the "Bandhopper
Factory," a new collection of pages about Ben Grace's Bandhopper mobile
antenna.

It contains a lot of information and is quite nicely done.
--
Dick Flanagan W6OLD CFII Minden, Nevada


From [e-mail] Sat Dec 21 12:36:22 1996
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From: KD1YV <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: My near field calculations need a sanity check
Date: Sun, 15 Dec 1996 23:22:20 -0500
Organization: Hamily !
Lines: 63
Message-ID: <[e-mail]>
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In hoping to comply with the FCC requirements, I am doing some analysis on my
station conditions.  I am using the program NF.EXE which Brian Beezley was
kind enough to release to the public.

The 10m calcuations seem to produce some bizzare results.  It's a modest setup
,
just 100 watts into a 10m wire dipole half a wavelength above the ground.  How
ever,
the output of the program shows some disturbingly high results of both the
electric and magnetic field strengths.  The maximums are

20,700 V/m where the MPE for controlled exposure is 1842 / 28.3 MHz = 65.088 V
/m
and
13.2 A/m where the MPE for controlled exposure is 4.89 / 28.3 MHz = 0.17279 A/
m

I can't help thinking (hoping) that I've done something stupid, but I tried
juggling the numbers slightly, and results remained intolerable.

I know that I haven't factored in the duty cycles, but even still, the numbers
seem to be out to lunch.

I've included the pertinent parts of the RUN file following, including the max
imum
points of emissions.  I'd appreciate if another pair of eyes could take a look
at them, and hopefully point out my stupid error.  Thanks in advance for havin
g
a look

===

10 m Dipole of #14 Wire
Ground
28.3 MHz
1 copper wire, feet
1   0 -8.269 16.537   0 8.269 16.537  #14
1 source
Wire 1, center


Default Ground:  Dielectric Constant 14   Conductivity 2 mS/m

-------------------------   NEAR ELECTRIC FIELD  -----------------------------
--

 Power:    100 watts

 Component &         Real       Imaginary     Magnitude      Phase    Peak Fie
ld
 Field Point         V/m           V/m           V/m          deg        V/m

 X       0.0      +0.00E+00     +0.00E+00      0.00E+00        0.0
 Y       3.7      +5.66E+01     -1.30E+02      1.41E+02      -66.4
 Z      16.5      -1.06E+04     +1.78E+04      2.07E+04      120.9     2.07E+0
4

--------------------------   NEAR MAGNETIC FIELD   ---------------------------
--

 Power:    100 watts

 Component &         Real       Imaginary     Magnitude      Phase    Peak Fie
ld
 Field Point         A/m           A/m           A/m          deg        A/m


 X       0.0      -1.13E+01     -6.83E+00      1.32E+01     -148.8
 Y      -0.3      +0.00E+00     +0.00E+00      0.00E+00        0.0
 Z      16.5      +0.00E+00     +0.00E+00      0.00E+00        0.0     1.32E+0
1

--
73 de Jim, KD1YV
http://pw1.netcom.com/~jimkd1yv/hamily.html


From [e-mail] Sat Dec 21 12:36:23 1996
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From: [e-mail] (John Mallick)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: My near field calculations need a sanity check
Date: 16 Dec 1996 14:59:05 GMT
Organization: GE Corp. Research And Development
Lines: 42
Sender: mallick@proteus (John Mallick)
Distribution: world
Message-ID: <593o3p$[e-mail]>
References: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: proteus.crd.ge.com

In article <[e-mail]>, KD1YV <[e-mail]> write
s:
|> In hoping to comply with the FCC requirements, I am doing some analysis on
my
|> station conditions.  I am using the program NF.EXE which Brian Beezley was
|> kind enough to release to the public.
|>
|> The 10m calcuations seem to produce some bizzare results.  It's a modest se
tup,
|> just 100 watts into a 10m wire dipole half a wavelength above the ground.
However,
|> the output of the program shows some disturbingly high results of both the
|> electric and magnetic field strengths.  The maximums are
|>
|> 20,700 V/m where the MPE for controlled exposure is 1842 / 28.3 MHz = 65.08
8 V/m
|> and
|> 13.2 A/m where the MPE for controlled exposure is 4.89 / 28.3 MHz = 0.17279
 A/m
|>
|> I can't help thinking (hoping) that I've done something stupid, but I tried
|> juggling the numbers slightly, and results remained intolerable.
|>
|> I know that I haven't factored in the duty cycles, but even still, the numb
ers
|> seem to be out to lunch.
|>

Those results do seem a bit high.  100 watts of RF across the a 50 ohm resisto
r
(like the feedpoint impedance) is only about 70 V of RF total, your number
of 20,700 V/m doesn't look too realistic.  Assuming 100 W of RF radiating
isotropically into a 5 meter radius sphere in free space (377 ohm) gives about
11 V/m (yeah, I know that's not the *near* field, but it is a pretty good
ballpark number), so I think the numbers are suspect.  I'll even give you a fa
ctor
of 10...

Is NF.EXE available as freeware/downloadable?

73, John WA1HNL

--
.... ..     .... ..     .... ..     .... ..     .... ..     .... ..
John A. Mallick WA1HNL                    E-mail: [e-mail]
GE Corporate Research and Development     Phone: [phone] (W)
Schenectady, NY 12301                     FAX:   [phone] (W)
.... ..     .... ..     .... ..     .... ..     .... ..     .... ..

"Work like hell.  Tell everyone everything you know.  Close a deal
 with a handshake.  And have fun." --- "Doc" Edgerton


From [e-mail] Sat Dec 21 12:36:24 1996
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From: Cecil Moore <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: My near field calculations need a sanity check
Date: Mon, 16 Dec 1996 12:38:29 -0800
Organization: Intel Corporation
Lines: 13
Message-ID: <[e-mail]>
References: <[e-mail]>
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KD1YV wrote:
> the output of the program shows some disturbingly high results of both the
> electric and magnetic field strengths.

Hi Jim, remember a half-wavelength high dipole on 10m is a little over
17ft high. A 6ft person standing directly below it would be getting
quite a dose of radiation just 11ft (1/3 WL) from the antenna. Make
it one wavelength high (35ft) and see what you get.

Disclaimer: I know nothing about the program you're using but remember
the induction field exists up to a wavelength away, by definition.

73, Cecil, W6RCA, OOTC


From [e-mail] Sat Dec 21 12:36:25 1996
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From: Jake Brodsky <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: My near field calculations need a sanity check
Date: Tue, 17 Dec 1996 11:17:56 -0500
Organization: Utter Chaos
Lines: 8
Message-ID: <[e-mail]>
References: <[e-mail]>
Reply-To: [e-mail]
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Isn't there a READ.ME file in NF explicitly saying that you shouldn't
use it for the purpose of evaluating personal safety?

--
Jake Brodsky, mailto:[e-mail]
PP-ASEL IA, Cessna Cardinal N30946, Based @ MD24
Amateur Radio Station AB3A
"Beware of the massive impossible!"


From [e-mail] Sat Dec 21 12:36:26 1996
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From: KD1YV <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: My near field calculations need a sanity check
Date: Sat, 21 Dec 1996 00:14:46 -0500
Organization: Hamily !
Lines: 19
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
NNTP-Posting-Host: dby-ct2-12.ix.netcom.com
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Jake Brodsky wrote:
>
> Isn't there a READ.ME file in NF explicitly saying that you shouldn't
> use it for the purpose of evaluating personal safety?

Yes, but I'd bet that his lawyer made him put that in there.  If that were tak
en
literally, I'd bet that there is no way that any amateur could calculate the
RF exposure Maximum Permissible Exposures as dictated by the FCC, no matter
what method they use.

My understanding, from a fairly reliable source, is that the NF sub-set of AO
was specifically made available as freeware to help hams in the calculations
of the exposure limits to meet the FCC regulations effective in just 12 days.
Since my corrected calculations show that I am at less than one tenth of
uncontrolled MPEs at all bands on which I operate, I'll stick with these.

--
73 de Jim, KD1YV
http://pw1.netcom.com/~jimkd1yv/hamily.html


From [e-mail] Sat Dec 21 12:36:27 1996
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From: [e-mail] (Mustang Maniac)
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.equipment,rec.radio.amateur.misc
Subject: Re: Need Help Identifying This HF Antenna
Date: 12 Dec 1996 13:56:07 GMT
Lines: 16
Message-ID: <58p2tn$[e-mail]>
References: <[e-mail]>
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Xref: news1.epix.net rec.radio.amateur.antenna:32642 rec.radio.amateur.equipment:44185 rec.radio.amateur.misc:120431

From your GIF image, I'd say it's a HyGain 18-AVT five-band vertical.
I can't help with a manual, but at least you know what it is now.  :)

--
Dean W. Hemphill                      Email: [e-mail]
211 Addison Place
PO Box 328                            Home:  [phone]
Lake Dallas, Texas 75065-0328         Work:  [phone]
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Amateur radio operator K5DH, avid QRPer and CW op, VE (ARRL and W5YI)
Ford Mustang enthusiast ('66 coupe, '69 GT-350, '72 conv, '95 GT conv)
Die-cast model car collector (mainly Ford products, in all scales)
Plastic model car builder (mainly Ford products, 1:24 / 1:25 scale)
Glass insulator collector (specializing in "oddball" pieces)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .



From [e-mail] Sat Dec 21 12:36:28 1996
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From: Dave Burr <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.equipment,rec.radio.amateur.misc
Subject: Re: Need Help Identifying This HF Antenna
Date: Thu, 12 Dec 1996 18:14:20 -0600
Organization: MCSNet Services
Lines: 9
Message-ID: <[e-mail]>
References: <[e-mail]> <58p2tn$[e-mail]>
NNTP-Posting-Host: dtburr.pr.mcs.net
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I concur...it looks like an 18 AVT/WB from the graphic, although your
description is a little confusing. I don't know about extra sections for
"phone" use.

Contact Telex/Hy-Gain. They are good about providing manuals free or for
just a few bucks.

Dave
K9XK


From [e-mail] Sat Dec 21 12:36:29 1996
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From: Dave Earnest <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.equipment,rec.radio.amateur.misc
Subject: Re: Need Help Identifying This HF Antenna
Date: Thu, 12 Dec 1996 11:29:04 -0800
Organization: Lost in the Silicon Valley
Lines: 26
Message-ID: <[e-mail]>
References: <[e-mail]>
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To: Douglas Gavilanes <[e-mail]>
Xref: news1.epix.net rec.radio.amateur.antenna:32662 rec.radio.amateur.equipment:44243 rec.radio.amateur.misc:120503

Douglas Gavilanes wrote:
>
Looks like a Hustler 4 or 5-BTV? (Newtronics)


> I installed this HF multiband vertical at my QTH about 8 years ago, and
> it was about 8 years old (though new in the box) back then, and now I
> can't find the paperwork on the antenna.  I put it up anticipating an
> upgrade to General eventually, but never found the time to upgrade, so
> it has gone without use all this time.  It stands about 30 feet tall or
> so, and required radials for each band, in the configuration that I
> assembled it in.  I seem to remember assembling it for CW use, but now
> wish to operate phone on 10M. Does anyone out there recognize it?
> Better yet, does anyone have a copy of the assembly instructions that I
> could obtain a copy of?  I still have the additional two tubing segments
> required for phone use, which were never installed.  Help!
>
> An eyeballed GIF image is attached for your entertainment (hi-hi).  >:)
>
> TNX es 73s,
>
> Doug Gavilanes, N6XQY
> Garden Grove, California
>
>     ---------------------------------------------------------------
>  [Image]


From [e-mail] Sat Dec 21 12:36:31 1996
Path: news1.epix.net!news3.epix.net!uunet!in1.uu.net!199.172.16.9!news.LASER.NET!usenet
From: [e-mail] (sean hall)
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.equipment,rec.radio.amateur.misc
Subject: Re: Need Help Identifying This HF Antenna
Date: Fri, 13 Dec 1996 10:47:03 GMT
Organization: LaserNet
Lines: 37
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ffx67.laser.net
X-Newsreader: Forte Free Agent 1.1/32.230
Xref: news1.epix.net rec.radio.amateur.antenna:32690 rec.radio.amateur.equipment:44295 rec.radio.amateur.misc:120621

On Wed, 11 Dec 1996 23:38:42 -0800, Douglas Gavilanes
<[e-mail]> wrote:

>This is a multi-part message in MIME format.
>
>--------------164F2A015918
>Content-Type: text/plain; charset=us-ascii
>Content-Transfer-Encoding: 7bit
>
>I installed this HF multiband vertical at my QTH about 8 years ago, and
>it was about 8 years old (though new in the box) back then, and now I
>can't find the paperwork on the antenna.  I put it up anticipating an
>upgrade to General eventually, but never found the time to upgrade, so
>it has gone without use all this time.  It stands about 30 feet tall or
>so, and required radials for each band, in the configuration that I
>assembled it in.  I seem to remember assembling it for CW use, but now
>wish to operate phone on 10M. Does anyone out there recognize it?
>Better yet, does anyone have a copy of the assembly instructions that I
>could obtain a copy of?  I still have the additional two tubing segments
>required for phone use, which were never installed.  Help!
>
>An eyeballed GIF image is attached for your entertainment (hi-hi).  >:)
>
>TNX es 73s,
>
>Doug Gavilanes, N6XQY
>Garden Grove, California



It's a HUSTLER 4BTV (maybe a 5BTV).   It might work fairly well on
10-40 meters, but it's worthless on 75-80.  They're about $139 new
now.

73/sean hall
W1SWH



From [e-mail] Sat Dec 21 12:36:32 1996
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From: Mike Watson <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.equipment,rec.radio.amateur.misc
Subject: Re: Need Help Identifying This HF Antenna
Date: Thu, 19 Dec 1996 15:39:48 -0600
Organization: SkyNET Corporation
Lines: 27
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ip62.sky.net
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
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Xref: news1.epix.net rec.radio.amateur.antenna:32947 rec.radio.amateur.equipment:44690 rec.radio.amateur.misc:121164

Douglas Gavilanes wrote:
>
> I installed this HF multiband vertical at my QTH about 8 years ago, and
> it was about 8 years old (though new in the box) back then, and now I
> can't find the paperwork on the antenna.  I put it up anticipating an
> upgrade to General eventually, but never found the time to upgrade, so
> it has gone without use all this time.  It stands about 30 feet tall or
> so, and required radials for each band, in the configuration that I
> assembled it in.  I seem to remember assembling it for CW use, but now
> wish to operate phone on 10M. Does anyone out there recognize it?
> Better yet, does anyone have a copy of the assembly instructions that I
> could obtain a copy of?  I still have the additional two tubing segments
> required for phone use, which were never installed.  Help!
>
> An eyeballed GIF image is attached for your entertainment (hi-hi).  >:)
>
> TNX es 73s,
>
> Doug Gavilanes, N6XQY
> Garden Grove, California
>
>
Your antenna is a Hy-Gain 18AVT-WB.  I had two of 'em.  They're still be
sold by Hy-Gain.

Mike Watson
WB0IKT


From [e-mail] Sat Dec 21 12:36:33 1996
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From: [e-mail] (tim)
Newsgroups: rec.radio.amateur.antenna
Subject: need ideas on 6to1 balun for 2 m.
Date: Fri, 13 Dec 96 01:44:07 GMT
Organization: fudpuckers
Lines: 7
Message-ID: <58qceo$kjm$[e-mail]>
NNTP-Posting-Host: slip166-72-196-242.fl.us.ibm.net
X-Newsreader: News Xpress 2.0 Beta #2

Any ideas on how to build a 6 to 1 balun?From 300 ohm balanced to 50 ohm
unbalanced.Thanks in advance

              Tim KF4FCO-EM70 Spamless Ham REPLY WITH CARE
             I'AM PC HANDICAPED AND I TYPE WITH TWO FINGERS
              AND I SUFFER FROM LAP TOP FEVER!!!!!!!!!!!!!!
             :*********************************************]


From [e-mail] Sat Dec 21 12:36:33 1996
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From: Cecil Moore <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: need ideas on 6to1 balun for 2 m.
Date: Fri, 13 Dec 1996 11:55:20 -0800
Organization: Intel Corporation
Lines: 12
Message-ID: <[e-mail]>
References: <58qceo$kjm$[e-mail]>
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tim wrote:
> Any ideas on how to build a 6 to 1 balun?From 300 ohm balanced to 50 ohm

Hi Tim, this is a reasonable question if you are putting up a 300 ohm
antenna, like a single-band folded dipole. If your antenna is not
300 ohms and/or is not single-band, then a 1:1 current balun/choke would
be the best way to go although a 4:1 will work just as well as a 6:1.

Any of the Jerry Sevick (sp?) books or magazine articles in 'CQ' will
yield the info you need.

73, Cecil, W6RCA, OOTC


From [e-mail] Sat Dec 21 12:36:34 1996
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From: Rolfe Tessem <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Need impedance bridge advice
Date: Mon, 16 Dec 1996 15:11:16 -0500
Organization: Lucky Duck Productions, Inc.
Lines: 20
Message-ID: <[e-mail]>
Reply-To: [e-mail]
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I'm in the market for a surplus impedance bridge and would like some
advice from those who have been down this road before. The most
commonly mentioned model seems to be the General Radio 916, followed by the
General Radio 1606 for more money (I think I have those right). What
is a fair price for one of these, and what should one look for when
shopping the surplus sources? Do they normally come with oscillator and
cables, or are you supposed to build your own? What is the difference
between the General Radio 1606A and 1606B? The latter seems to go for
double the price of the former? Is calibration a big issue?

Of course, if anyone has one for sale, I'd like to hear about it.

Thanks,

Rolfe. W1VC

--
Rolfe Tessem     |     Lucky Duck Productions, Inc.
[e-mail]    |     96 Morton Street
[phone]   |     New York, NY 10014


From [e-mail] Sat Dec 21 12:36:35 1996
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From: [e-mail] (Jonathan Helis)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Newbie needs help for dipole antenna
Date: Wed, 11 Dec 1996 23:03:50 GMT
Organization: InterSurf Online, Inc.
Lines: 67
Message-ID: <58nf71$[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ts1-4.dialup.intersurf.com
X-Newsreader: Forte Free Agent 1.0.82

[e-mail] (steve perron) wrote:


>       I have been collecting equipment and various hardware to get
>on the air since I passed my license in October.  I have a few
>questions I haven't found answers for yet.

>I have an Icom 735 transceiver with the matching power supply and plan
>to use a dipole antenna wich will probably be located in the attic.  I
>am going to use RG8 mini-foam coax and operate mostly CW on either 20,
>17 or 15m, depending how much space is available in the attic.

>My questions are:

>1.  What size wire (AWG) should I use to build the dipole.  I will
>probably try to keep power down to avoid rfi with next wall
>neighbours, which means output of less than 100w.

Any size wire will be alright, but usually 12 or 14 gauge is what most
hams use.


>2.  Since I'm renting and cannot do all kind of funny things, Can I
>use the incoming water pipe as rf ground.  The building is quite old
>and the outlet ground is also connected to the same ground.

This you need to be careful of.  The pipe may snake all around the
building, and be a long way before going into the ground.  This may
actually make it act more like an antenna than a ground.  Even though
you are in an old building, there maybe PVC pipe between your
connection point and the ground, which will make your ground
ineffective.


>3.  Any suggestions or comments on what kind of rf ground to use.
>Proper copper-clad rods are not easily available here(actually,
>nothing is available here.  Thank god, the military will move me out
>next year...)

>4.  Is a transmatch required for that setup?  My 735 has a built-in
>swr meter I can use to tune up the antenna.

Does the rig have a tuner built in as well, like many do these days.
If you are just going to use resonant antennas, you probably won't
need one.  If you are going to use a G5RV or a Windom, these require a
transmatch.  I have used an attic mounted 66 foot wire tuned with a
transmatch, and worked all over the U.S.  It even loaded up on 80
meters!


>Please understand this is my first try at this, and there is quite a
>few things I am probably missing.  Any comments/suggestions would be
>appreciated.

>Steve Perron VO1SLP

Sounds like you already have pretty much what you need to get started.
Good luck!


73,

Jonathan Helis, KB5IAV
Baton Rouge, Lousiana, USA

[e-mail]



From [e-mail] Sat Dec 21 12:36:37 1996
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From: "Richard A. Seifert" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Newbie:  Many, Many Questions
Date: 14 Dec 1996 01:15:33 GMT
Organization: Netcom
Lines: 33
Message-ID: <01bbe95c$4485c0e0$2cc3b8cd@#seifertr>
NNTP-Posting-Host: wbg-va1-12.ix.netcom.com
X-NETCOM-Date: Fri Dec 13  5:15:33 PM PST 1996
X-Newsreader: Microsoft Internet News 4.70.1155

Hello all.  I'm relatively new to amateur radio; I earned a tech no-code
license this summer and also passed the general (element 3B?) written exam.
 Presently, I'm studying 13 wpm code for upgrade.  I think I'm doing
okay...using SuperMorse twice a day for the last week, I've managed to pin
down the first three levels.  I want to start listening to code over the
air, but I haven't bought the radio to do so yet.  In time...

Anticipating the upgraded license and associated HF band privileges, I'm
presently trying to learn as much as I can.  Is there a particular reading
list that any of you might recommend?  If so, please distinguish between
the "must-have" books and the "nice-to-have" books, from your personal
experiences if at all possible.

Also, I vaguely understand that many variables affect the propagation of HF
(frequency, time of day, weather, season, sunspots, etc..)  I want to
better understand (1) the theory behind the propagation changes, and (2)
the "no-kidding" non-technical translation; i.e. what bands can you operate
at what time of day and in what season?  What are reasonable distances for
each of these bands with 100W?  Note, I'm on the east coast (in the DC
area) and I believe I'll be "strapping" an ~80ft wire antenna to the side
of my (metal structure) brick-surfaced high-rise.

Finally, if you know of any FAQs, websites, or otherwise, that might help
me get started, please feel free to post them as well!  Thanks so much for
your time and cooperation in helping me better understand this fascinating
hobby!

--

73's, KB2ZMF
Rich
----------------------
[e-mail]


From [e-mail] Sat Dec 21 12:36:38 1996
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From: "Dale Martin" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Newbie:  Many, Many Questions
Date: 14 Dec 1996 16:24:25 GMT
Organization: Houston Area League of PC Users
Lines: 64
Message-ID: <01bbe9db$497785a0$[e-mail]>
References: <01bbe95c$4485c0e0$2cc3b8cd@#seifertr>
NNTP-Posting-Host: pm0-54.hal-pc.org
X-Newsreader: Microsoft Internet News 4.70.1155

The answer to many, if not most, amateur radio questions of a technical,
operational, procedural natue  reside in two books:

The ARRL Handbook for Radio Amateurs and The ARRL Operating Manual.
Both are published by the American Radio Relay League.  You are going to
spend somewhere
around $60 for them, but it will be the best $60 you could ever spend in
this hobby.

I don't believe you can find as wide a coverage of the amateur radio hobby
in any two other books.

73,
--
Dale Martin
[e-mail]
http://www.hal-pc.org/~kg5u



Richard A. Seifert <[e-mail]> wrote in article
<01bbe95c$4485c0e0$2cc3b8cd@#seifertr>...
> Hello all.  I'm relatively new to amateur radio; I earned a tech no-code
> license this summer and also passed the general (element 3B?) written
exam.
>  Presently, I'm studying 13 wpm code for upgrade.  I think I'm doing
> okay...using SuperMorse twice a day for the last week, I've managed to
pin
> down the first three levels.  I want to start listening to code over the
> air, but I haven't bought the radio to do so yet.  In time...
>
> Anticipating the upgraded license and associated HF band privileges, I'm
> presently trying to learn as much as I can.  Is there a particular
reading
> list that any of you might recommend?  If so, please distinguish between
> the "must-have" books and the "nice-to-have" books, from your personal
> experiences if at all possible.
>
> Also, I vaguely understand that many variables affect the propagation of
HF
> (frequency, time of day, weather, season, sunspots, etc..)  I want to
> better understand (1) the theory behind the propagation changes, and (2)
> the "no-kidding" non-technical translation; i.e. what bands can you
operate
> at what time of day and in what season?  What are reasonable distances
for
> each of these bands with 100W?  Note, I'm on the east coast (in the DC
> area) and I believe I'll be "strapping" an ~80ft wire antenna to the side
> of my (metal structure) brick-surfaced high-rise.
>
> Finally, if you know of any FAQs, websites, or otherwise, that might help
> me get started, please feel free to post them as well!  Thanks so much
for
> your time and cooperation in helping me better understand this
fascinating
> hobby!
>
> --
>
> 73's, KB2ZMF
> Rich
> ----------------------
> [e-mail]
>


From [e-mail] Sat Dec 21 12:36:39 1996
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From: "Mark Nelson" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Newbie:  Many, Many Questions
Date: 14 Dec 1996 23:15:01 GMT
Organization: AA6DX
Lines: 68
Message-ID: <01bbea15$c8ccd320$[e-mail]>
References: <01bbe95c$4485c0e0$2cc3b8cd@#seifertr>
NNTP-Posting-Host: ppp23.humboldt1.com
X-Newsreader: Microsoft Internet News 4.70.1155

Well, to start of with Richard, it would be most convenient for you to find
what hams affectionately call an ELMER .. someone (or more) hopefully in
your neighborhood, that can share with you their years of experience and
know-how.  As for books .. well, the propagation theories and Ohms law have
not changed over the years very much .. get all the used books you can!
And .. used magazines, too!  When I started learning about this in the
early 60s, I read hundreds of old magazines.  (Kinda see a lot of the same
same stuff in the new ones!) -- I was fortunate to have several ELMERs, and
thank them to this day for their efforts with a bumbling newbie.
Howsoever, most of them are Silent Keys by now.

Get the ARRL Handbook --and Antenna book.  There are plenty others, too ..
but these are the "Must Have"   Study ONE or TWO subjects at a time ..
don't try to do it all at one fell swoop!  Propagation is quite
interesting.  Having lived two years at North Pole Alaska, and having
operated from the Southern Hemisphere, I still enjoy trying to "figure it
out"!

Enjoy the Morse code!  It is FUN!  --and, in many circumstances, quite
efficient!

73  (just one .. apostrophe s makes 73 mean that BEST REGARDS belongs to
someone !
Mark .. AA6DX  Eureka, Far Northern CA
Richard A. Seifert <[e-mail]> wrote in article
<01bbe95c$4485c0e0$2cc3b8cd@#seifertr>...
> Hello all.  I'm relatively new to amateur radio; I earned a tech no-code
> license this summer and also passed the general (element 3B?) written
exam.
>  Presently, I'm studying 13 wpm code for upgrade.  I think I'm doing
> okay...using SuperMorse twice a day for the last week, I've managed to
pin
> down the first three levels.  I want to start listening to code over the
> air, but I haven't bought the radio to do so yet.  In time...
>
> Anticipating the upgraded license and associated HF band privileges, I'm
> presently trying to learn as much as I can.  Is there a particular
reading
> list that any of you might recommend?  If so, please distinguish between
> the "must-have" books and the "nice-to-have" books, from your personal
> experiences if at all possible.
>
> Also, I vaguely understand that many variables affect the propagation of
HF
> (frequency, time of day, weather, season, sunspots, etc..)  I want to
> better understand (1) the theory behind the propagation changes, and (2)
> the "no-kidding" non-technical translation; i.e. what bands can you
operate
> at what time of day and in what season?  What are reasonable distances
for
> each of these bands with 100W?  Note, I'm on the east coast (in the DC
> area) and I believe I'll be "strapping" an ~80ft wire antenna to the side
> of my (metal structure) brick-surfaced high-rise.
>
> Finally, if you know of any FAQs, websites, or otherwise, that might help
> me get started, please feel free to post them as well!  Thanks so much
for
> your time and cooperation in helping me better understand this
fascinating
> hobby!
>
> --
>
> 73's, KB2ZMF
> Rich
> ----------------------
> [e-mail]
>


From [e-mail] Sat Dec 21 12:36:41 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Newbie:  Many, Many Questions
Date: 16 Dec 1996 06:22:16 GMT
Organization: AOL http://www.aol.com
Lines: 20
Message-ID: <[e-mail]>
References: <01bbe95c$4485c0e0$2cc3b8cd@#seifertr>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]
X-Newsreader: AOL Offline Reader

In article <01bbe95c$4485c0e0$2cc3b8cd@#seifertr>, "Richard A. Seifert"
<[e-mail]> writes:

>
>Anticipating the upgraded license and associated HF band privileges, I'm
>presently trying to learn as much as I can.  Is there a particular
reading
>list that any of you might recommend?  If so, please distinguish between
>the "must-have" books and the "nice-to-have" books, from your personal
>experiences if at all possible.
>
>

  If you are on a tight budget, I found the Amateur Radio Alminac to be
very usefull and it covers a wide range of subjects. It may also answer
your questions reguarding propigation.  There is a nice gerneral
description of each of the ham bands in it.  I havn't compared it to any
of the ARRL books though, since I am a new ham myself.  I recomend you get
a copy and place it in the bathroom for general reading material.  Just
MHO   Paul


From [e-mail] Sat Dec 21 12:36:42 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Optimum 2m Quad Dimensions?
Date: 11 Dec 1996 23:17:37 GMT
Organization: UNM Health Sciences Computer services Center
Lines: 30
Message-ID: <58nfeh$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: medusa.unm.edu


    In a recent _Amateur_Radio_Trader_, plans were published for a 2 meter
  4-element quad.  This is your basic 4 square element quad on a 2x2" wood
  boom with 1x1" spreaders, center notched to be in the same plane.  The
  source of this plan was another amateur who gave them these dimensions
  in an over-the-air 2 meter QSO, so it's apparently in the public domain.

  The element lengths, spreader hole spacings, and element spacings were
  given as:

              Wire Length   Spreader Hole Spacing    Element Spacing

    Reflector:  86 1/8"         30 1/8"
                                                   > 20 1/4" spacing
    Driven El:  81"             28 5/16"
                                                   > 12 5/16" spacing
    Director1:  77 13/16"       27 1/4"
                                                   > 12 7/8" spacing
    Director2:  74"             25 7/8"


    Has anyone modeled this antenna, and/or does anyone have a better
  design for a similar cheap 4-el quad for 2 meters?  What about scaling
  this down for 70cm?  Any pointers would be welcome.

  -Bob

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
| Bob Boardman KC5SFW -Albuquerque, New Mexico, USA- [e-mail]|
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=


From [e-mail] Sat Dec 21 12:36:43 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: PATRICK STODDARD - ARE YOU OUT THERE!!!!
Date: Fri, 13 Dec 1996 04:46:59 GMT
Organization: HIWAY Internet Service Provider
Lines: 17
Message-ID: <58pqhv$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: plline4.avel.co.uk
X-Newsreader: Forte Free Agent 1.0.82

Patrick

I hope that you  can remember our correspondence.

I am sorry but I have had major problems here and have not been able
to reply to you for ages.

I have lost your email contact information but hope that you will
receive this and respond.

I hope to hear from you.

73
--
Stephen G7UXL
[e-mail]



From [e-mail] Sat Dec 21 12:36:45 1996
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From: [e-mail] (Chris)
Newsgroups: rec.radio.amateur.antenna
Subject: Phased arrays for HF reception
Date: Tue, 17 Dec 96 20:03:25 GMT
Organization: Quark, Strangeness and Charm
Lines: 24
Message-ID: <[e-mail]>
Reply-To: [e-mail]
X-Mail2News-User: [e-mail]
X-Mail2News-Path: tikva.demon.co.uk
X-Newsreader: Demon Internet Simple News v1.30

Hi,

I am toying with the idea of setting up a small phased array of antennas
for HF reception, for amateur, broadcast and services such as air and
meteo. The idea in my mind at the moment is to use small untuned loops
each connected to a pre-amp and then combine them through some suitable
phase shifting device.

My questions are the following:

Has anyone tried this or any alternative methods to achieve gain and
interference reduction on HF and, if so, how well did it work?

What would be a recommended way of achieving a variable phase shift (or
delay ) over a reasonable bandwidth? I guess the crude and simple approach
would be to used lengths of coaxial cable which could be switched in or
out to achieve the required delay.

Any thoughts or ideas would be appreciated.

--
Chris
G3YQV



From [e-mail] Sat Dec 21 12:36:47 1996
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From: [e-mail] (pa0lbn)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Phased arrays for HF reception
Date: Wed, 18 Dec 1996 23:19:06
Organization: EUnet Belgium, Leuven, Belgium
Lines: 30
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: dialup089.hasselt.eunet.be
X-Newsreader: Trumpet for Windows [Version 1.0 Rev A]

In article <[e-mail]> [e-mail] (Chris) wr
ites:

>Hi,

>I am toying with the idea of setting up a small phased array of antennas
>for HF reception, for amateur, broadcast and services such as air and
>meteo. The idea in my mind at the moment is to use small untuned loops
>each connected to a pre-amp and then combine them through some suitable
>phase shifting device.

>My questions are the following:

>Has anyone tried this or any alternative methods to achieve gain and
>interference reduction on HF and, if so, how well did it work?

>What would be a recommended way of achieving a variable phase shift (or
>delay ) over a reasonable bandwidth? I guess the crude and simple approach
>would be to used lengths of coaxial cable which could be switched in or
>out to achieve the required delay.

A good shifter can be made by a variable length of coax cable.
Up to a half wave times shortening factor gives you 180 degrees.
To make a variable length you can switch with relays sections in series
of 1,2,4,8 16feet etc. With this pieces any length up to twice the maximum
section minus the shortest can be made. This has to be inserted in each
section and all outputs must be connected to a combiner.
To be fully correct one should insert variable attenuators in each section
in order to compensate for coax losses.
regards,
PA0LBN


From [e-mail] Sat Dec 21 12:36:49 1996
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From: [e-mail] (Steve Byan)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Phased arrays for HF reception
Date: Wed, 18 Dec 1996 13:13:51 -0400
Organization: Hitachi Computer Products, Inc.
Lines: 55
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: brainiac.hi.com

In article <[e-mail]>, [e-mail] wrote:

> Has anyone tried this or any alternative methods to achieve gain and
> interference reduction on HF and, if so, how well did it work?

Check out Mark Connelly's article in one of the earlier issues of Fine
Tunings "Proceedings" for a tropical band phasing unit used with (if I
recall correctly) two end-fed random-wires at oriented at 90 degrees. This
design uses resonant tank circuits as the phase shifters.

There have been several articles in the ARRL's QST magazine over the years
on phasing units. The classic one was by Webb and I think it was in the
early 80's. I don't have the reference handy. Webb's used a delay line
constructed from lengths of coax cable as a Hilbert transformer (90 degree
phase shift). Others have used pi networks. You sum a linear combination
of the output of the Hilbert transformer and the direct signal to generate
an arbitrary phase shift.

> What would be a recommended way of achieving a variable phase shift (or
> delay ) over a reasonable bandwidth? I guess the crude and simple approach
> would be to used lengths of coaxial cable which could be switched in or
> out to achieve the required delay.

I've wanted to try using the lattice network broadband phase shifters that
are sometimes used at audio frequencies to generate SSB using the phasing
method (also used in the Sony 2010 synchronous detector). There have been
a few articles in ARRL's QEX about these networks in recent years. I
speculate that the JPS antenna noise reduction unit uses such a network,
since it appears to have a broadband 90 degree phase shift.

One problem with these networks is that the output impedance gets rather
high (they also look to be lossy; I don't know for sure), and so an
amplifier is needed. Since this is essentially a broadband preamp, you can
get into problems due to insufficient dynamic range in the preamp. Judging
by what I remember of the reviews I read, the JPS unit appears to suffer
from this malady.

W8JITom has posted here about his untuned loop array. While his array does
not have a variable directivity, it supposedly has better rejection of
signals to the rear than a Beverage. (A Beverage has a high-angle lobe to
the rear that is not down very far from the response off the front. So
while is has a good front-to-back ratio for groundware signals, it isn't
so good for skywave signals.) I'm anxiously awaiting the publication of
Tom's article on this antenna.

BTW, anyone have an opinion on a good reference for loop receiving arrays?
Kraus's text doesn't mention them. I don't have a copy of Jasik but I
think I might ask Santa for one if it's got a good section on loop arrays.


Regards,
-Steve

--
Steve Byan                                  internet: [e-mail]


From [e-mail] Sat Dec 21 12:36:50 1996
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From: [e-mail] (Robert A. Schill)
Newsgroups: rec.radio.amateur.antenna
Subject: PHASED VERTICALS
Date: 11 Dec 96 22:13:42 GMT
Organization: ucsd usenet gateway
Lines: 25
Message-ID: <[e-mail]>
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Originator: [e-mail]

12/11/96

Hi everybody,

I presently am operating with a GAP Challenger VIII and am very well
pleased with it's performance.

My question is, has anyone attempted phasing two or more of them.  I have
been toying with the idea that if I could space them at a half wave on 40
meters I would be able to run them both broadside and end fire on that
band.  On the other bands I do believe I could run them broadside with no
ill effects, and probably better results than running a single antenna.

If this would work, what would the phasing harness look like?  I do want
to be in a position to switch them from the shack.  I am too old to run
in and out in the inclement wx to switch antennas.

I would appreciate any information available.


Bob Schill  N9ZZ
Mountain Home, Arkansas
ARCI QRP # 4744, MI QRP #266, AR QRP #1, QRP-L #705, ARS #189
E-Mail address  :  [e-mail]
Packet address:  N9ZZ @ N0KFQ.#SWMO.MO.USA


From [e-mail] Sat Dec 21 12:36:51 1996
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From: [e-mail] (Roy Lewallen)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: PHASED VERTICALS
Date: Fri, 13 Dec 96 17:52:16 GMT
Organization: EZNEC Antenna Software
Lines: 36
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In article <[e-mail]>,
   [e-mail] (Robert A. Schill) wrote:
>12/11/96
>
>Hi everybody,
>
>I presently am operating with a GAP Challenger VIII and am very well
>pleased with it's performance.
>
>My question is, has anyone attempted phasing two or more of them.  I have
>been toying with the idea that if I could space them at a half wave on 40
>meters I would be able to run them both broadside and end fire on that
>band.  On the other bands I do believe I could run them broadside with no
>ill effects, and probably better results than running a single antenna.
>
>If this would work, what would the phasing harness look like?  I do want
>to be in a position to switch them from the shack.  I am too old to run
>in and out in the inclement wx to switch antennas.
>
>I would appreciate any information available.

Two elements in phase (broadside) and 180 degrees out of phase (endfire,
when spaced a half wavelength) are special cases which are easy to feed.
You can get the desired phasing for broadside with any two equal lengths of
feedline. To change to endfire, just add an electrical half wavelength to
one of the two lines. (Don't try extrapolating this method for other
phasing angles or arrays of more elements.) Using this scheme you'll almost
certainly have to do some matching between the feedpoint junction and the
rig, and the match will change when you switch from one pattern to the
other. There might be a combination of length and coax impedance which
would give a reasonable match with both patterns, but you'd have to know a
lot more than I do about the Gap Challenger (i.e., the mutual impedance
between two of them and the self-impedance of a single one), or do a lot of
experimenting, to find this combination if it exists.

Roy Lewallen, W7EL


From [e-mail] Sat Dec 21 12:36:52 1996
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From: Dave Earnest <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Phasing R7's
Date: Fri, 20 Dec 1996 16:25:20 -0800
Organization: Lost in the Silicon Valley
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I hate to look stuff up anymore.  Maybe someone has tried this.

I want to phase to R7 verticals.  I have no problem with the
phasing. . been there, done that.

I wonder what would happen if you have one configured for the low
end of the band and the other antenna configured for the high end?
I've had 2 dipoles up...one cut for 7.025 and the other cut for
7.225..fed with a common coax.  It appeared to be flat across that
range.

I assume the same would be true in this instance? The difference is
phasing them with 1/4 wave spacing and a Dunestar stack match.

Thanks for any inputs.

73, Dave K7JJ/6


From [e-mail] Sat Dec 21 12:36:52 1996
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From: [e-mail] (Jan PA0LBN)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Phasing R7's
Date: Sat, 21 Dec 1996 01:53:57
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In article <[e-mail]> Dave Earnest <[e-mail]>
 writes:
>I hate to look stuff up anymore.  Maybe someone has tried this.
>I want to phase to R7 verticals.  I have no problem with the
>phasing. . been there, done that.

>I wonder what would happen if you have one configured for the low
>end of the band and the other antenna configured for the high end?
>I've had 2 dipoles up...one cut for 7.025 and the other cut for
>7.225..fed with a common coax.  It appeared to be flat across that
>range.

>I assume the same would be true in this instance? The difference is
>phasing them with 1/4 wave spacing and a Dunestar stack match.

Good chance that it is true for your swr, but it will distort your phasing.
But I guess this is a aprox. equal distorsion over the frequency range
which can be corrected by an extra piece of cable in the feedline
of the lowest tuned antenna.

regards, Jan PA0LBN


From [e-mail] Sat Dec 21 12:36:54 1996
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From: Jeff Gregor <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew,rec.radio.amateur.equipment,rec.radio.amateur.antenna
Subject: Plans for 70cm duplexer?
Date: Fri, 20 Dec 1996 08:55:36 -0500
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I am trying to find blueprints for the construction of a 70cm duplexer.
The ARRL Antenna book has a great set of directions for a 2M duplexer,
but I have not been able to find the 70cm equivilant. A co-worker of
mine owns his own machine shop, so I can get one made fairly cheaply
(better than paying $500+ for a commercially made one, anyway).  If
anyone can suggest (or even supply) construction directions for this I
would certainly appreciate it! Email replies would be preferred but I
will try and check back in the newsgroups in a couple of days.

Thanks!
Jeff Gregor, N1UDS
[e-mail]


From [e-mail] Sat Dec 21 12:36:55 1996
Newsgroups: rec.radio.amateur.homebrew,rec.radio.amateur.equipment,rec.radio.amateur.antenna
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From: [e-mail] (Gary Coffman)
Subject: Re: Plans for 70cm duplexer?
Message-ID: <[e-mail]>
Reply-To: [e-mail] (Gary Coffman)
Organization: Destructive Testing Systems
References: <[e-mail]>
Date: Sat, 21 Dec 1996 02:24:10 GMT
Lines: 20
Xref: news1.epix.net rec.radio.amateur.homebrew:22236 rec.radio.amateur.equipment:44760 rec.radio.amateur.antenna:32999

In article <[e-mail]> [e-mail] writes:
>I am trying to find blueprints for the construction of a 70cm duplexer.
>The ARRL Antenna book has a great set of directions for a 2M duplexer,
>but I have not been able to find the 70cm equivilant. A co-worker of
>mine owns his own machine shop, so I can get one made fairly cheaply
>(better than paying $500+ for a commercially made one, anyway).  If
>anyone can suggest (or even supply) construction directions for this I
>would certainly appreciate it! Email replies would be preferred but I
>will try and check back in the newsgroups in a couple of days.

You should be able to simply scale those plans, IE reducing every
dimension by 3 would yield a set of 432 MHz duplexers. To reach
440 MHz, you'd reduce everything by slightly more than 3.

Gary
--
Gary Coffman KE4ZV          |    You make it,     | Due to provider problems
Destructive Testing Systems |    we break it.     | with previous uucp address
es
534 Shannon Way             |    Guaranteed!      | Email to [e-mail]
Lawrenceville, GA 30244     |                     |


From [e-mail] Sat Dec 21 12:36:56 1996
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From: Rick Perry <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew,rec.radio.amateur.equipment,rec.radio.amateur.antenna
Subject: Re: Plans for 70cm duplexer?
Date: Fri, 20 Dec 1996 23:29:07 -0800
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Gary Coffman wrote:
>
> In article <[e-mail]> [e-mail] writes:
> >I am trying to find blueprints for the construction of a 70cm duplexer.
> >The ARRL Antenna book has a great set of directions for a 2M duplexer,
> >but I have not been able to find the 70cm equivilant. A co-worker of
> >mine owns his own machine shop, so I can get one made fairly cheaply
> >(better than paying $500+ for a commercially made one, anyway).  If
> >anyone can suggest (or even supply) construction directions for this I
> >would certainly appreciate it! Email replies would be preferred but I
> >will try and check back in the newsgroups in a couple of days.
>
> You should be able to simply scale those plans, IE reducing every
> dimension by 3 would yield a set of 432 MHz duplexers. To reach
> 440 MHz, you'd reduce everything by slightly more than 3.
> Depending on the power level (and environment) of the repeater you might get
 by with a mobil duplexer, I've done it on several 440 machines.  Sinclair has
 one rated for 50 watts and does an excellent job.  Might cost less than build
ing one, although I've seen alot of the same type at hamfests.  Just an idea.

73's  Rick  W7AV
> Gary
> --
> Gary Coffman KE4ZV          |    You make it,     | Due to provider problems
> Destructive Testing Systems |    we break it.     | with previous uucp addre
sses
> 534 Shannon Way             |    Guaranteed!      | Email to [e-mail]
> Lawrenceville, GA 30244     |                     |


From [e-mail] Sat Dec 21 12:36:57 1996
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From: [e-mail] (Mike Del Pozzo)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: powerful antenna
Date: Wed, 18 Dec 1996 06:27:33 GMT
Organization: MindSpring Enterprises
Lines: 13
Message-ID: <597oan$[e-mail]>
References: <01bbec60$7f2705e0$[e-mail]>
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"Antonio D. Balleras" <[e-mail]> wrote:

>Hi!

>I just like to know personally from you, what is the best, most powerful
>antenna for 2 meter, is it still yagi antenna?

Hello Antonio ,
Try a 6 element Quagi & compare....
73 de Mike
KR4TG




From [e-mail] Sat Dec 21 12:36:58 1996
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From: "Antonio D. Balleras" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: powerful antenna
Date: 17 Dec 1996 21:38:18 GMT
Organization: Center for Network Manangement and Services
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Hi!

I just like to know personally from you, what is the best, most powerful
antenna for 2 meter, is it still yagi antenna?



From [e-mail] Sat Dec 21 12:36:59 1996
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From: Dick Metsker <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: PRO-96
Date: Sun, 15 Dec 1996 17:35:18 -0600
Organization: Personal PC
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Hi - I have a new Pro96, does anyone have info about ice loading in the
Middle Tennessee area?  Thanks and 73's from KE4RGD, Dick in
Hendersonville, TN.



From [e-mail] Sat Dec 21 12:37:00 1996
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Subject: QUAD Antennas...Anyone?
Newsgroups: rec.radio.amateur.antenna
From: [e-mail]
Date: Sat, 07 Dec 96 00:03:52 EST
Message-ID: <[e-mail]>
Organization: WurmBorn Rangers BBS
Lines: 20


I am interested in finding out about quad design antennas.
Does anybody have anything helpful, informative, or enlightening?
PLEASE e-mail me at

[e-mail]
[e-mail]
[e-mail]

Preferrably quad antennas for a two meter rig.

Thanks to the Ham Gurus!

Greg.

--
                  WurmBorn Rangers BBS <==> 314.939.9445
                   Home of.....  Just about anything!!!
                     "I wanna be a WurmBorn Ranger
                                        do, dado, dado....."



From [e-mail] Sat Dec 21 12:37:00 1996
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From: [e-mail] (Jan PA0LBN)
Newsgroups: rec.radio.amateur.antenna,rec.radio.shortwave
Subject: Re: Question about "spacers" for a T2FD
Date: Fri, 20 Dec 1996 13:59:32
Organization: none
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In article <59d505$[e-mail]> [e-mail] (Curt Phill
ips) writes:

>  I thinking about building a T2FD (tilted, terminated, folded dipole)
>  antenna for shortwave receiving.
>  For the frequencies I'm designing it for, a T2FD requires two 60' wires
>  running in parallel, separated by about 2.5 feet for their entire length.
>  Has anyone else built on of these antennas?
>  How close should the "spacers" be to keep the two wires apart in this
>  type of configuration?
>  Your suggestions are appreciated.

B&W with its 90ft T2FD for 3.5-30MHz uses pvc water pipes of
48cm length and 21mm thick as spacers. Total 6 spacers.
This works very well.


Jan, PA0LBN


From [e-mail] Sat Dec 21 12:37:02 1996
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From: [e-mail] (Curt Phillips)
Newsgroups: rec.radio.amateur.antenna,rec.radio.shortwave
Subject: Question about "spacers" for a T2FD
Date: Fri, 20 Dec 1996 09:30:33 GMT
Organization: Mystic Knights of the Sea
Lines: 17
Message-ID: <59d505$[e-mail]>
Reply-To: [e-mail]
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  I thinking about building a T2FD (tilted, terminated, folded dipole)
antenna for shortwave receiving.
  For the frequencies I'm designing it for, a T2FD requires two 60' wires
running in parallel, separated by about 2.5 feet for their entire length.
  Has anyone else built on of these antennas?
  How close should the "spacers" be to keep the two wires apart in this
type of configuration?
  Your suggestions are appreciated.

--
======== Opinions expressed are solely those of the author ==========
Curt Phillips, CEM K4CP exKD4YU;WB4LHI|  Those who beat their swords
Engineer / Writer / NCSU Wolfpack fan | into plowshares will end up
Chairman, Tarheel Scanner/SWL Group   | doing the plowing for someone
ARRL Life; QCWA; Raleigh ARS; NRA; AEE| who kept their sword.
==== [e-mail] ==== Copyright 1996 All Rights Reserved ====



From [e-mail] Sat Dec 21 12:37:03 1996
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From: Guy Atkins <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.shortwave
Subject: Re: Question about "spacers" for a T2FD
Date: 21 Dec 1996 05:33:38 GMT
Organization: Seanet Online Services, Seattle WA
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References: <59d505$[e-mail]>
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You may want to read my article on T2FDs, which also discusses spacers.
It is a reprint from Fine Tunings "Proceedings" series, and can be found
on the Nordic SW Center WWW page:

http://www.sds.se/org/swl/

Guy


***************************************************************
AOR AR7030/350' mini-Beverage/Carolina Beam/Active E-Field Ant.
***************************************************************
 [e-mail]  /  [e-mail]  /  Bonney Lake, WA




From [e-mail] Sat Dec 21 12:37:03 1996
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From: [e-mail] (Maillet Dominique)
Newsgroups: rec.radio.amateur.antenna
Subject: R7 or R7000 ??
Date: Tue, 17 Dec 1996 17:26:57 -400
Organization: Mines de Douai
Lines: 7
Message-ID: <596hm3$[e-mail]>
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pse help me to make a choise for mechanical resistance
with GP R7 or R7000 .
it is more aisy to mount R7000 ?
with difference it is ?
tnx

F5TSW.


From [e-mail] Sat Dec 21 12:37:04 1996
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From: aor <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Radio Clubs in Philadelphia,  Check ARRL Club List
Date: Sun, 15 Dec 1996 19:07:22 -0500
Organization: gteais-org
Lines: 12
Message-ID: <[e-mail]>
References: <58k6ng$[e-mail]>
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To: "Roger A. Quon" <[e-mail]>

Contact the ARRL.  They will have MANY clubs in the area.  I used to
live 20 miles southeast of Phila, and was amaizzzzed at the activity in
the area.

Go to the ARRL home page  http://www.arrl.org   and look for clubs, or
hams in your area, and see.  They have a master list.

BTW, which area in the city are you near?

73,

Al, NW2M


From [e-mail] Sat Dec 21 12:37:05 1996
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From: [e-mail] (Fractenna)
Newsgroups: rec.radio.amateur.antenna
Subject: RE: RF Absorbers
Date: 11 Dec 1996 23:27:18 GMT
Organization: AOL http://www.aol.com
Lines: 6
Message-ID: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

Hi--

Got several suggestions but have not found any that work at about a Gig
yet (have tested 'em). When I hit on a cheap one will pass it on.

Chip


From [e-mail] Sat Dec 21 12:37:06 1996
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From: [e-mail] (Dudley Chapman)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: RF Mobile hash
Date: Tue, 17 Dec 1996 03:07:17 GMT
Organization: MindSpring Enterprises, Inc.
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[e-mail] (bob puharic) wrote:

>I just installed a heathkit sb1400 mobile rig in my 94 chevy blazer.
>using a tj antenna bb3 screwdriver...installed according to mfrs spec.
>I get  alot of hash when i turn on ignition key, without starting
>engine. i have electronic dash...any suggestions? tnx all...bob/wf3h

Bob,
    Your electronic hash is probably from the computer in your
ignition system, which comes on the moment you turn the key.   Its
noise is difficult to get rid of.  You need to try sheilding and beads
and stuff.  Also, some auto makers offer rfi kits for mobile
communications.  Contact your dealer and you might be pleasantly
suprised to find that Chevy has one.

Dudley, WA1X



From [e-mail] Sat Dec 21 12:37:07 1996
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From: [e-mail] (W6KKT Jesse)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: RF Mobile hash
Date: Tue, 17 Dec 1996 12:56:47 GMT
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On Tue, 17 Dec 1996 09:42:46 GMT, [e-mail] (bob puharic) wrote:

>I just installed a heathkit sb1400 mobile rig in my 94 chevy blazer.
>using a tj antenna bb3 screwdriver...installed according to mfrs spec.
>I get  alot of hash when i turn on ignition key, without starting
>engine. i have electronic dash...any suggestions? tnx all...bob/wf3h
>
Hi Bob, the electric fuel pump may be your problem.  Try by-passing it
with a capacitor.
73, Jesse, W6KKT


From [e-mail] Sat Dec 21 12:37:07 1996
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From: [e-mail] (bob puharic)
Newsgroups: rec.radio.amateur.antenna
Subject: RF Mobile hash
Date: Tue, 17 Dec 1996 09:42:46 GMT
Organization: ENTER.NET
Lines: 5
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I just installed a heathkit sb1400 mobile rig in my 94 chevy blazer.
using a tj antenna bb3 screwdriver...installed according to mfrs spec.
I get  alot of hash when i turn on ignition key, without starting
engine. i have electronic dash...any suggestions? tnx all...bob/wf3h



From [e-mail] Sat Dec 21 12:37:08 1996
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From: [e-mail] (Tim Smith)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: RF Mobile hash
Date: Tue, 17 Dec 96 19:00:52 GMT
Organization: From the home front
Lines: 21
Message-ID: <596tom$[e-mail]>
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In article <[e-mail]>,
   [e-mail] (W6KKT Jesse) wrote:
>On Tue, 17 Dec 1996 09:42:46 GMT, [e-mail] (bob puharic) wrote:
>
>>I just installed a heathkit sb1400 mobile rig in my 94 chevy blazer.
>>using a tj antenna bb3 screwdriver...installed according to mfrs spec.
>>I get  alot of hash when i turn on ignition key, without starting
>>engine. i have electronic dash...any suggestions? tnx all...bob/wf3h
>>
>Hi Bob, the electric fuel pump may be your problem.  Try by-passing it
>with a capacitor.
>73, Jesse, W6KKT


Definitly the fuel pump in mine.  I have an S15 GMC Sonoma.  I selectivly
pulled fuses until the has went away.  When I yanked the fuel pump it went
away...a small .01 bypass cap lowered it but not completly.

Good luck!

Tim


From [e-mail] Sat Dec 21 12:37:11 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: RF Mobile hash
Date: Wed, 18 Dec 1996 22:30:57 GMT
Organization: ENTER.NET
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On Tue, 17 Dec 1996 09:42:46 GMT, [e-mail] (bob puharic) wrote:

>I just installed a heathkit sb1400 mobile rig in my 94 chevy blazer.
>using a tj antenna bb3 screwdriver.

thanks all...fuel pump and the computer seem to be the prime
culprits...fuel pump looks easier to solve so i'll give that a try!
happy holidays...


From [e-mail] Sat Dec 21 12:37:11 1996
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From: Bill Glover <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: RFI and cable help needed
Date: Wed, 11 Dec 1996 12:08:38 -0800
Organization: Weimar Systems and Software
Lines: 11
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Hello,

I have an apparent strange RFI problem at my station. I appear to be
causing cable ch 35 sound interference from my vhf rig to my TV
when the tv is tuned to ch 35.

Question, what frequency is the sound fm of cable channel 35?
Is there a frequency table somewhere on the net showing the various
cable tv frequencies?

thanks in advance...bill kk6pw


From [e-mail] Sat Dec 21 12:37:12 1996
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From: "William Kapp Clark" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: RFI Shielding
Date: 13 Dec 1996 21:11:38 GMT
Organization: SoVerNet, Inc.
Lines: 14
Message-ID: <01bbe93a$837cf4c0$[e-mail]>
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X-Newsreader: Microsoft Internet News 4.70.1155

I have a long wire on the third floor of my house for AM reception. A
computer is in the same room, and on the same circuit.

Is it possible to tame the amount of RFI coming from the computer power
supply ? It really does a number on AM and FM reception. I would like to
run the radio while using the computer, bu so far no real luck. I ran a
seperate ground (a single wire to the "ground" portion of the 3 way outlet
- not exactly UL or military grade but it made some difference). Would like
to find a simple shielding solution outside of turning off the computer!

Thank you all in advance!

Bill Clark
[e-mail]


From [e-mail] Sat Dec 21 12:37:13 1996
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From: Cecil Moore <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: RFI Shielding
Date: Fri, 13 Dec 1996 14:18:03 -0800
Organization: Intel Corporation
Lines: 8
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William Kapp Clark wrote:
> Would like
> to find a simple shielding solution outside of turning off the computer!

Hi Bill, as a start, wrap all your antennas (computer cables)
around a high-permeability ferrite rod or through a toroid.

73, Cecil, W6RCA, OOTC


From [e-mail] Sat Dec 21 12:37:14 1996
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From: P Tyers <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,alt.radio.scanner,rec.radio.scanner
Subject: Re: scanner antenna
Date: Tue, 17 Dec 1996 14:20:00 +1100
Organization: Telstra Research Labs
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Aaron Myers wrote:
>
I wanted to extend the listining area on my
> radio as well as my hand held scanner.  I would like an indoor
> antenna(s) for them but if I must, an outdoor will do.  Does anyone have
If you can live with an outdoor antenna then a discone is ideal as a
scanner antenna. Tandy ( your Radio Shack I think) should have something
suitable. Is a conical shaped antenna topped by a flat section with very
broad response 30-300 Mhz ?? and some gain which is enhanced by virtue
of its elevated position. Needs a mast/eave mount.

--
P Tyers, Tel. [phone]
AARnet: [e-mail]
CSnet: [e-mail]    HAM: VK3KTS
MAIL: Telstra Research Laboratories,P.O. Box 249,
      Clayton,VICTORIA 3168,AUSTRALIA


From [e-mail] Sat Dec 21 12:37:15 1996
Message-ID: <[e-mail]>
Date: Mon, 16 Dec 1996 21:17:55 -0500
From: Aaron Myers <[e-mail]>
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Subject: scanner antenna
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I thought this would be the best place to put this since I have
questions about antenna(s).  I wanted to extend the listining area on my
radio as well as my hand held scanner.  I would like an indoor
antenna(s) for them but if I must, an outdoor will do.  Does anyone have
any suggestions??  Thanks in advance.

Sin a.k.a. Aaron
-----------------------------
Nothing is impossible for the
one who doesn't have to do it
-----------------------------
http://www.csra.net/amyers
-----------------------------
[e-mail]


From [e-mail] Sat Dec 21 12:37:16 1996
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From: [e-mail] (Tim Smith)
Newsgroups: rec.radio.amateur.antenna,alt.radio.scanner,rec.radio.scanner
Subject: Re: scanner antenna
Date: Tue, 17 Dec 96 18:56:04 GMT
Organization: From the home front
Lines: 29
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In article <[e-mail]>, P Tyers <[e-mail]> wrote:
>Aaron Myers wrote:
>>
>I wanted to extend the listining area on my
>> radio as well as my hand held scanner.  I would like an indoor
>> antenna(s) for them but if I must, an outdoor will do.  Does anyone have
>If you can live with an outdoor antenna then a discone is ideal as a
>scanner antenna. Tandy ( your Radio Shack I think) should have something
>suitable. Is a conical shaped antenna topped by a flat section with very
>broad response 30-300 Mhz ?? and some gain which is enhanced by virtue
>of its elevated position. Needs a mast/eave mount.

The radio shack discone due to it's dimentions is good only down to 100 Mhz
but ok up through about 1.5Ghz   Discones are very easy to build...and
especially for attic applications it does not have to be that durable.

You could even make the cone out of stiff paper or cardboard
wrapped/glued/taped with a layer of aluminum foil.  The disc can be cut out of

one of those throw away aluminum cookie sheets.  Attach your feed line (RG58
or 59) with alligator clips to the center of the disc and and close to the
point of the cone as possible...leave about 1/2" spacing between the disc and
the cone.  If you like just use a plastic cup over the cone as a spacer for
the disc to set on.  Now very carefully walk this "object d' art" up the attic

steps and set it on the attic floor.  It may be ugly but it works great.  With

my MFJ swr analyzer it is less than 2:1 SWR on most of the bands of interest.

Formulas and dimensions are in the ARRL handbook.  I wouldn't do much
transmitting on it though...unless I toss some cookie dough on the disc :-)
>


From [e-mail] Sat Dec 21 12:37:17 1996
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From: Michael Perry <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,alt.radio.scanner,rec.radio.scanner
Subject: Re: scanner antenna
Date: 18 Dec 1996 01:54:37 GMT
Organization: AT&T WorldNet Services
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I have the Dressler Active Antennea for 50-2000Hz.  The price is steep
but what a piece of equipment! I pick up everthing, and my AR8000 doesnt
clip at the cel bands.  It goes for $269 from Gilfer in NJ.



From [e-mail] Sat Dec 21 12:37:20 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna,alt.radio.scanner,rec.radio.scanner
Subject: Re: scanner antenna
Date: Wed, 18 Dec 1996 00:12:08 -0800
Organization: A customer of Pacific Bell Internet Services
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Aaron Myers wrote:
>
> I thought this would be the best place to put this since I have
> questions about antenna(s).  I wanted to extend the listining area on my
> radio as well as my hand held scanner.  I would like an indoor
> antenna(s) for them but if I must, an outdoor will do.  Does anyone have
> any suggestions??  Thanks in advance.
>
> Sin a.k.a. Aaron
> -----------------------------
> Nothing is impossible for the
> one who doesn't have to do it
> -----------------------------
> http://www.csra.net/amyers
> -----------------------------
> [e-mail]
Radio Shack has a great discone antenna.
Been using mine for years.
Can't beat the price.


From [e-mail] Sat Dec 21 12:37:21 1996
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From: Scott Ryan <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,alt.radio.scanner,rec.radio.scanner
Subject: Re: scanner antenna
Date: Wed, 18 Dec 1996 06:51:25 -0600
Organization: InfiNet
Lines: 7
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References: <[e-mail]> <[e-mail]>
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> Radio Shack has a great discone antenna.
> Been using mine for years.
> Can't beat the price...........

The price is good on the RS discone but the antenna is real weak on the
low freqeuncies (i.e. 25-100 MHz).  Try a Diamond, Icom or Sirieo for
best results.


From [e-mail] Sat Dec 21 12:37:22 1996
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From: [e-mail] (Tim Smith)
Newsgroups: rec.radio.amateur.antenna,alt.radio.scanner,rec.radio.scanner
Subject: Re: scanner antenna
Date: Wed, 18 Dec 96 14:02:46 GMT
Organization: From the home front
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In article <[e-mail]>, [e-mail] wrote:

>Radio Shack has a great discone antenna.
>Been using mine for years.

It's not bad...

>Can't beat the price.

At $59 it's WAY overpriced!  Build one for less than $7!

Tim


From [e-mail] Sat Dec 21 12:37:23 1996
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From: [e-mail] (Tim Stammers)
Newsgroups: rec.radio.amateur.antenna,alt.radio.scanner,rec.radio.scanner
Subject: Re: scanner antenna
Date: 18 Dec 1996 22:00:17 GMT
Organization: Mary Hitchcock Memorial Hospital
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In article <5990ll$[e-mail]>
[e-mail] (Tim Smith) writes:

> Build one for less than $7!

Have you got the plans?  I'd be interested!  Thanks.

- Tim


From [e-mail] Sat Dec 21 12:37:23 1996
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From: Marty <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,alt.radio.scanner,rec.radio.scanner
Subject: Re: scanner antenna
Date: Wed, 18 Dec 1996 14:41:36 -0700
Organization: XMission Internet (801 539 0900)
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Tim Smith wrote:
>
> In article <[e-mail]>, [e-mail] wrote:
>
> >Radio Shack has a great discone antenna.
> >Been using mine for years.
>
> It's not bad...
>
> >Can't beat the price.
>
> At $59 it's WAY overpriced!  Build one for less than $7!
>
> Tim

Will the $7 dollar antenna work outdoors?

Marty


From [e-mail] Sat Dec 21 12:37:25 1996
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From: Jim <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Separation of repeater antennas.
Date: Fri, 13 Dec 1996 13:39:20 -0800
Organization: Ha!
Lines: 41
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Hi,

We are putting up a 1.2 GHz repeater her at work and for several reasons
we are using separate transmit and receive antennas.  We are also forced
to have them separated in the horizontal plane at about 175 ft.. No
vertical separation.

The antennas are identical and have approximately 8.4dBd gain.  The
transmitter will be at an output power of 10 watts and the feed will
have a 2 dB loss, so about 6.5 watts at the antenna.

Loss on the receive feedline is also about 2 dB.  Sensitivity of the
receiver is .32 microvolts (12 dB SINAD) and selectivity is rated as -60
dB for greater than 30kHz.

NO DUPLEXER!

My "gut feeling" is that we are going to desense the heck out of the
receiver if not simply overload it by blow by.  I feel that we will
require a duplexer, but can't mathmatically prove it. What are your
thoughts on this?  Can someone help with calculations?  Even good old
experience and rules of thumb are welcome.

Feel free to refer to texts etc. since I have not found such myself.


Thanks,

Jim
KF6AGJ
--
My from line is not machine readable to foil spambots, my real e-mail
address is:
jimf<at>corp.sgi.com    Where <at> equates to the @ sign.
Do not hit reply to send back to me.

*Sending unsolicited e-mails to my address that are not of a*
*previously established personal nature nor directly related*
*to my business will be considered a request of my proof reading*
*services.  My rates are $50 per word and punctuation.  Sending*
*to my address is considered acceptance of these terms.*


From [e-mail] Sat Dec 21 12:37:26 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!worldnet.att.net!uunet!in3.uu.net!206.250.118.17!nntp.earthlink.net!usenet
From: "Christopher (Chris) W. Boone" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Separation of repeater antennas.
Date: Sun, 15 Dec 1996 09:49:17 -0800
Organization: ABC Radio Network Engineering - Dallas
Lines: 48
Message-ID: <[e-mail]>
References: <[e-mail]>
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Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
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X-Mailer: Mozilla 2.01 (Win16; U)

If you could get ANY seperation vertically, like mounting then one atop
the other, is better than going horiz though with the amount you
mentioned MAY work...provided you use cavities on the TX and RX to get
rid of the sideband noise....If you can get the RX DIRECTLY above or
below the TX antenna, this null would be better than any horizontal
mounting...

WB5WRR here in Ft Worth has done extensive 1.2 Ghz operation in
homebrewing....he found using duplexers out of certain cellphones could
be reworked to 1.2 Ghz and used as filters! but you have to be careful as
the connectors on them are metalized PLASTIC (coated that is!)

73
Chris
WB5ITT

Jim wrote:
>
> Hi,
>
> We are putting up a 1.2 GHz repeater her at work and for several reasons
> we are using separate transmit and receive antennas.  We are also forced
> to have them separated in the horizontal plane at about 175 ft.. No
> vertical separation.
>
> The antennas are identical and have approximately 8.4dBd gain.  The
> transmitter will be at an output power of 10 watts and the feed will
> have a 2 dB loss, so about 6.5 watts at the antenna.
>
> Loss on the receive feedline is also about 2 dB.  Sensitivity of the
> receiver is .32 microvolts (12 dB SINAD) and selectivity is rated as -60
> dB for greater than 30kHz.
>
> NO DUPLEXER!
>
> My "gut feeling" is that we are going to desense the heck out of the
> receiver if not simply overload it by blow by.  I feel that we will
> require a duplexer, but can't mathmatically prove it. What are your
> thoughts on this?  Can someone help with calculations?  Even good old
> experience and rules of thumb are welcome.
>
> Feel free to refer to texts etc. since I have not found such myself.
>
> Thanks,
>
> Jim
> KF6AGJ
> --


From [e-mail] Sat Dec 21 12:37:28 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!ix.netcom.com!news.webspan.net!usenet
From: [e-mail] (Bill)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Separation of repeater antennas.
Date: Mon, 16 Dec 1996 06:48:55 GMT
Organization: WebSpan Inc., New Jersey
Lines: 57
Message-ID: <592rcl$[e-mail]>
References: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: usr1-04.nwk.nj.webspan.net
X-Newsreader: Forte Free Agent 1.0.82

Jim <[e-mail]> wrote:

>Hi,

>We are putting up a 1.2 GHz repeater her at work and for several reasons
>we are using separate transmit and receive antennas.  We are also forced
>to have them separated in the horizontal plane at about 175 ft.. No
>vertical separation.

>The antennas are identical and have approximately 8.4dBd gain.  The
>transmitter will be at an output power of 10 watts and the feed will
>have a 2 dB loss, so about 6.5 watts at the antenna.

>Loss on the receive feedline is also about 2 dB.  Sensitivity of the
>receiver is .32 microvolts (12 dB SINAD) and selectivity is rated as -60
>dB for greater than 30kHz.

>NO DUPLEXER!

>My "gut feeling" is that we are going to desense the heck out of the
>receiver if not simply overload it by blow by.  I feel that we will
>require a duplexer, but can't mathmatically prove it. What are your
>thoughts on this?  Can someone help with calculations?  Even good old
>experience and rules of thumb are welcome.

>Feel free to refer to texts etc. since I have not found such myself.


>Thanks,

>Jim
>KF6AGJ
>--
>My from line is not machine readable to foil spambots, my real e-mail
>address is:
>jimf<at>corp.sgi.com   Where <at> equates to the @ sign.
>Do not hit reply to send back to me.

>*Sending unsolicited e-mails to my address that are not of a*
>*previously established personal nature nor directly related*
>*to my business will be considered a request of my proof reading*
>*services.  My rates are $50 per word and punctuation.  Sending*
>*to my address is considered acceptance of these terms.*



Hello Jim, I hope you can get by with one or two cavities at the
receiver(bandpass with a notch reject). You certainly won't need a
full blown duplexer. You can try to experiment by positioning one
antenna into a "null" which will give you added isolation. If you
want, Call Wacom products and they will tell you exactly what you will
need to know. They have a chart which will show the vertical or
horizontal distance needed to overcome desense. 175 feet at that
frequency is many wavelengths, so it may not be as bad as it seems.
Let me know how you make out. 73, Bill-KA2QEP




From [e-mail] Sat Dec 21 12:37:29 1996
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From: [e-mail] (Fred White)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Separation of repeater antennas.
Date: 17 Dec 1996 16:04:53 GMT
Organization: CSUSM
Lines: 38
Message-ID: <596gb5$[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ciscots2_1.csusm.edu

In article <[e-mail]>, Jim <[e-mail]> says:
>
>Hi,
>
>We are putting up a 1.2 GHz repeater her at work and for several reasons
>we are using separate transmit and receive antennas.  We are also forced
>to have them separated in the horizontal plane at about 175 ft.. No
>vertical separation.
>
>The antennas are identical and have approximately 8.4dBd gain.  The
>transmitter will be at an output power of 10 watts and the feed will
>have a 2 dB loss, so about 6.5 watts at the antenna.
>
>Loss on the receive feedline is also about 2 dB.  Sensitivity of the
>receiver is .32 microvolts (12 dB SINAD) and selectivity is rated as -60
>dB for greater than 30kHz.
>
>NO DUPLEXER!
>
>My "gut feeling" is that we are going to desense the heck out of the
>receiver if not simply overload it by blow by.  I feel that we will
>require a duplexer, but can't mathmatically prove it. What are your
>thoughts on this?  Can someone help with calculations?  Even good old
>experience and rules of thumb are welcome.
>
>Feel free to refer to texts etc. since I have not found such myself.
>
>
>Thanks,
>
>Jim
>KF6AGJ
>--
>
Its too bad you can't even have 10 to 30 ft of vertical isolation, this
would probably work better than your horizontal proposal.

Fred


From [e-mail] Sat Dec 21 12:37:30 1996
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From: [e-mail] ( Bill Walker)
Newsgroups: rec.ham-radio,rec.radio.amateur,rec.radio.amateur.antenna,rec.radio.amateur.equipment,rec.radio.amateur.misc
Subject: Re: Setting up an antenna tower.
Followup-To: rec.ham-radio,rec.radio.amateur,rec.radio.amateur.antenna,rec.radio.amateur.equipment,rec.radio.amateur.misc
Date: 16 Dec 1996 17:44:43 GMT
Organization: East Central University
Lines: 29
Message-ID: <5941qb$[e-mail]>
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David P. Hummel, Jr. ([e-mail]) wrote:
: I have recently come to own a previously used antenna tower.  After months
: of hard work, I managed to finally get it out of the ground.  That was the
: hard part.  But here is the fun part.  Anybody have any ideas how I can dig
: a hole in the ground that is about 2.5ft in diameter and about 6.5ft deep?
: I tried a post hole digger, but the bits are only about 4 ft deep?   Any
: suggestions?

: Thank you in advance.
: David P. Hummel, Jr.
: KG2BX

Any of several solutions come to mind.  The folks that dig septic
tanks have equipment to dig holes like what you describe.  They are
usually quite reasonable.  Any good backhoe service would be able to
dig it for you.  The folks who dig piers for house foundations also
are able to move dirt.

I had a tower base dug, and the cost was only about $50 from scratch.
On another job, where the machinery was already present for another purpose,
it was a "freebie".

Good luck es 73 de W5GFE



--
Bill Walker
[e-mail]


From [e-mail] Sat Dec 21 12:37:31 1996
Path: news1.epix.net!news3.epix.net!uunet!in1.uu.net!204.71.1.48!newsfeed.internetmci.com!news.internetMCI.com!news-admin
From: "David P. Hummel, Jr." <[e-mail]>
Newsgroups: rec.ham-radio,rec.radio.amateur,rec.radio.amateur.antenna,rec.radio.amateur.equipment,rec.radio.amateur.misc
Subject: Setting up an antenna tower.
Date: 16 Dec 1996 15:41:19 GMT
Organization: InternetMCI
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I have recently come to own a previously used antenna tower.  After months
of hard work, I managed to finally get it out of the ground.  That was the
hard part.  But here is the fun part.  Anybody have any ideas how I can dig
a hole in the ground that is about 2.5ft in diameter and about 6.5ft deep?
I tried a post hole digger, but the bits are only about 4 ft deep?   Any
suggestions?

Thank you in advance.
David P. Hummel, Jr.
KG2BX



From [e-mail] Sat Dec 21 12:37:32 1996
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From: [e-mail] (Prescott)
Newsgroups: rec.ham-radio,rec.radio.amateur,rec.radio.amateur.antenna,rec.radio.amateur.equipment,rec.radio.amateur.misc
Subject: Re: Setting up an antenna tower.
Date: 16 Dec 1996 17:05:08 GMT
Organization: The Unorganization
Lines: 33
Message-ID: <593vg4$[e-mail]>
References: <01bbeb67$8fcce7b0$0fb919ce@davidh>
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David,

Contact your local utilities company. They often have drilling rigs to
put down telephone/light poles. I use one from a private electrical
contractor. Please be careful on your "new to you" tower. Contact the
manufacturer for proper guying procedures/anchor specs. Please inspect
it very carefully for rust, corrosion, etc. Check inside tubes if not
solid rod. Update life insurance policy!

73
Mark Prescott
KE4LWP

In article <01bbeb67$8fcce7b0$0fb919ce@davidh>, [e-mail]
says...
>
>I have recently come to own a previously used antenna tower.  After
months
>of hard work, I managed to finally get it out of the ground.  That was
the
>hard part.  But here is the fun part.  Anybody have any ideas how I can
dig
>a hole in the ground that is about 2.5ft in diameter and about 6.5ft
deep?
>I tried a post hole digger, but the bits are only about 4 ft deep?
Any
>suggestions?
>
>Thank you in advance.
>David P. Hummel, Jr.
>KG2BX
>



From [e-mail] Sat Dec 21 12:37:34 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!news.mindspring.com!usenet
From: "Mark Bryant" <[e-mail]>
Newsgroups: rec.ham-radio,rec.radio.amateur,rec.radio.amateur.antenna,rec.radio.amateur.equipment,rec.radio.amateur.misc
Subject: Re: Setting up an antenna tower.
Date: 17 Dec 1996 01:58:49 GMT
Organization: SOHObusiness Services
Lines: 50
Message-ID: <01bbebbe$5ba56460$a3d879a8@soho>
References: <01bbeb67$8fcce7b0$0fb919ce@davidh> <5941qb$[e-mail]>
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A bit of advice on using a backhoe to dig the hole for a tower.  All tower
mfgs strongly suggest you NOT use any back hoe type digging.  Reason is you
need to dig the hole straight down, pour concrete and let the concrete use
the sides of the ground as part of its support.  If you backhoe a 45 cubic
foot hole you cannot "backfill the excess hole after the concrete form is
poured.  The backfill cannot support the lateral tension of the concrete.

I just did a 4x4x6 hole two weeks ago.  I used a post hole digger making a
6 hole grid and then cleared the rest with a shovel.  Think of
gravedigging, I know I did.

Mark

 Bill Walker <[e-mail]> wrote in article <5941qb$[e-mail]>...
> David P. Hummel, Jr. ([e-mail]) wrote:
> : I have recently come to own a previously used antenna tower.  After
months
> : of hard work, I managed to finally get it out of the ground.  That was
the
> : hard part.  But here is the fun part.  Anybody have any ideas how I can
dig
> : a hole in the ground that is about 2.5ft in diameter and about 6.5ft
deep?
> : I tried a post hole digger, but the bits are only about 4 ft deep?
Any
> : suggestions?
>
> : Thank you in advance.
> : David P. Hummel, Jr.
> : KG2BX
>
> Any of several solutions come to mind.  The folks that dig septic
> tanks have equipment to dig holes like what you describe.  They are
> usually quite reasonable.  Any good backhoe service would be able to
> dig it for you.  The folks who dig piers for house foundations also
> are able to move dirt.
>
> I had a tower base dug, and the cost was only about $50 from scratch.
> On another job, where the machinery was already present for another
purpose,
> it was a "freebie".
>
> Good luck es 73 de W5GFE
>
>
>
> --
> Bill Walker
> [e-mail]
>


From [e-mail] Sat Dec 21 12:37:35 1996
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From: "Wendell - W5FL" <[e-mail]>
Newsgroups: rec.ham-radio,rec.radio.amateur,rec.radio.amateur.antenna,rec.radio.amateur.equipment,rec.radio.amateur.misc
Subject: Re: Setting up an antenna tower.
Date: 17 Dec 1996 02:06:51 GMT
Organization: Wyly Enterprises
Lines: 21
Message-ID: <01bbebbe$cb9565e0$[e-mail]>
References: <01bbeb67$8fcce7b0$0fb919ce@davidh>
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David, This is a very uncommon size hole for a tower.  Most guyed towers
are set in this size hole, but not this deep.  Most self supporting towers
are set in much larger holes depending on the height.  Most larger towers
use 4 holes about this size, one for each leg.  It would help if you state
what type tower you are putting up and the antennas you plan to put on it.

I had to call a pier drilling truck (they also set poles for the utility
company).  They charge anywhere from $60 to $100 per hour from the time
they leave their shop.  They can dig a hole like this in 30 minutes in
normal soil or a couple of hours of so in rock.  It cost me $480 for 8
hours to dig my antenna holes in rock.  There were four 18 inch x 5 1/2 ft
and 1 30 inch x 4 1/2 foot plus a 9 inch x 9 foot trying to get through the
rock for a ground rod, but it never came out the other side.  Good Luck.

> hard part.  But here is the fun part.  Anybody have any ideas how I can
dig
> a hole in the ground that is about 2.5ft in diameter and about 6.5ft
deep?
> I tried a post hole digger, but the bits are only about 4 ft deep?   Any
> suggestions?



From [e-mail] Sat Dec 21 12:37:36 1996
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From: Bill Wyatt <[e-mail]>
Newsgroups: rec.ham-radio,rec.radio.amateur,rec.radio.amateur.antenna,rec.radio.amateur.equipment,rec.radio.amateur.misc
Subject: Re: Setting up an antenna tower.
Date: Tue, 17 Dec 1996 16:48:53 +0000
Organization: OneNet
Lines: 41
Message-ID: <[e-mail]>
References: <01bbeb67$8fcce7b0$0fb919ce@davidh>
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To: "David P. Hummel, Jr." <[e-mail]>
Xref: news1.epix.net rec.radio.amateur.antenna:32835 rec.radio.amateur.equipment:44551 rec.radio.amateur.misc:120951

David P. Hummel, Jr. wrote:
>
 Anybody have any ideas how I can dig
> a hole in the ground that is about 2.5ft in diameter and about 6.5ft deep?
> I tried a post hole digger, but the bits are only about 4 ft deep?   Any
> suggestions?
>
> Thank you in advance.
> David P. Hummel, Jr.
> KG2BX

Good day one and all.......

David as for the backhoe, forget it......I've spent a number of years
running one and unless you have one of the really small ones, you can't
dig a hole 2.5 ft. in diameter and 6.5 ft. deep.  It just can't happen
and leave the surrounding ground undisturbed.  Sorry.

Having spent some time in the world of construction, the way I see it
you have 2 choices.  1.  Gat a shovel and someone with a small kester
that can dig and fit into a 2.5 ft. hole.  Yes, I know it is not very
likely but, it is a way.  2. Talk with the local electric company. They
have a truck that is used to set electric poles which has an auger that
can dig a round hole.  Most of these trucks will dig somewhere between
18 and 30 in..  Some have differant sized augers to dig the needed dia.
hole.

If you can talk them into digging the hole you may have to exchange
diameter for depth.  I'm sure there are some eng. type folks out there
that can give you the numbers but, I would thing 18-20 in. dia. and 8-9
ft. deep would be a good exchange for the requested 2.5 ft. x 6.5 ft..
Remember, put some re-bar steel in the cement base to hold the thing
together.

Hope this helps......and please I'm not trying to put anyone down on the
backhoe deal.....It's just that the physics of the way they dig that
won't let them do this paticular job.

73's and good luck with your tower.......

Bill   N5WO


From [e-mail] Sat Dec 21 12:37:37 1996
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From: [e-mail] (Al Rodecap)
Newsgroups: rec.ham-radio,rec.radio.amateur,rec.radio.amateur.antenna,rec.radio.amateur.equipment,rec.radio.amateur.misc
Subject: Re: Setting up an antenna tower.
Date: Tue, 17 Dec 1996 10:52:06 GMT
Lines: 22
Message-ID: <595tvi$1l08$[e-mail]>
References: <01bbeb67$8fcce7b0$0fb919ce@davidh>
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"David P. Hummel, Jr." <[e-mail]> wrote:

>I have recently come to own a previously used antenna tower.  After months
>of hard work, I managed to finally get it out of the ground.  That was the
>hard part.  But here is the fun part.  Anybody have any ideas how I can dig
>a hole in the ground that is about 2.5ft in diameter and about 6.5ft deep?
>I tried a post hole digger, but the bits are only about 4 ft deep?   Any
>suggestions?

>Thank you in advance.
>David P. Hummel, Jr.
>KG2BX

You can rent a small (very small) backhoe or trencher and dig the
proper hole. Alternatively, see if you can catch someone in your area
that is having some septic, sewer, drive, or other excavation done and
offer the guy running the equipment some cash to dig your hole.

Al Rodecap
WD9AGT




From [e-mail] Sat Dec 21 12:37:38 1996
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From: [e-mail] (Dick Flanagan)
Newsgroups: rec.ham-radio,rec.radio.amateur,rec.radio.amateur.antenna,rec.radio.amateur.equipment,rec.radio.amateur.misc
Subject: Re: Setting up an antenna tower.
Date: Tue, 17 Dec 1996 11:33:50 -0800
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Distribution: world
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In article <01bbebbe$5ba56460$a3d879a8@soho>, "Mark Bryant"
<[e-mail]> wrote:

>A bit of advice on using a backhoe to dig the hole for a tower.  All tower
>mfgs strongly suggest you NOT use any back hoe type digging.  Reason is you
>need to dig the hole straight down, pour concrete and let the concrete use
>the sides of the ground as part of its support.  If you backhoe a 45 cubic
>foot hole you cannot "backfill the excess hole after the concrete form is
>poured.  The backfill cannot support the lateral tension of the concrete.

A good back hoe operator can dig a straight hole.  I've got a 5 x 5 x 8
tower footing in my back yard and it was dug in about an hour by an
experienced operator using a two-foot bucket.
--
Dick Flanagan W6OLD CFII Minden, Nevada


From [e-mail] Sat Dec 21 12:37:39 1996
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From: [e-mail] ( Bill Walker)
Newsgroups: rec.ham-radio,rec.radio.amateur,rec.radio.amateur.antenna,rec.radio.amateur.equipment,rec.radio.amateur.misc
Subject: Re: Setting up an antenna tower.
Followup-To: rec.ham-radio,rec.radio.amateur,rec.radio.amateur.antenna,rec.radio.amateur.equipment,rec.radio.amateur.misc
Date: 17 Dec 1996 21:28:19 GMT
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Dick Flanagan ([e-mail]) wrote:


: A good back hoe operator can dig a straight hole.  I've got a 5 x 5 x 8
: tower footing in my back yard and it was dug in about an hour by an
: experienced operator using a two-foot bucket.
: --

        I second the motion.  We have a backhoe man here (Ada, Oklahoma)
        that I swear can do almost _anything_ with a backhoe.  It never
        would occur to me to use the word "delicate" with regard to
        a backhoe, but this fellow is a pure artist!

        73 de Bill W5GFE

--
Bill Walker
[e-mail]


From [e-mail] Sat Dec 21 12:37:40 1996
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From: [e-mail] (Mike Del Pozzo)
Newsgroups: rec.ham-radio,rec.radio.amateur,rec.radio.amateur.antenna,rec.radio.amateur.equipment,rec.radio.amateur.misc
Subject: Re: Setting up an antenna tower.
Date: Wed, 18 Dec 1996 06:10:32 GMT
Organization: MindSpring Enterprises
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"David P. Hummel, Jr." <[e-mail]> wrote:

>I have recently come to own a previously used antenna tower.  After months
>of hard work, I managed to finally get it out of the ground.  That was the
>hard part.  But here is the fun part.  Anybody have any ideas how I can dig
>a hole in the ground that is about 2.5ft in diameter and about 6.5ft deep?
>I tried a post hole digger, but the bits are only about 4 ft deep?   Any
>suggestions?

>Thank you in advance.
>David P. Hummel, Jr.
>KG2BX

Hello David;
I know noone wants to hear the old macho story about how
an induvidual completes an unbeleivable feat , but it was worth
the exercise and $$$ saved when I dug the base of my tower...
My tower is 80 ft , guyed, and the base is a 3 ft base section of
Rohn 25 sitting on 24 " of gravel ( big chunks ). My tower has
taken 2 direct strikes ( I think that's all ) and I could not ask for
a better ground as the rest of the shack remains unharmed. I dug
the hole with a post hole digger . Created a hole about 36" in DIA
and about 5 feet deep - so the top of the 36" section is flush with
the surface of the ground . Sitting on the gravel and who knows
how many miles of GA clay , the base is plenty sturdy after backfill.
Speaking of which : after you backfill you need to let the ground set
backup with frequent wattering.
I also had a guywire break once and the tower still hardly budged
I Have a 4 element Quad on a 30 foot boom up there .
Consider what ur putting up there first . and always listen to all the
great advice from those " who have been there - done that "
Gud Luck es 73 de
Mike KR4TG




From [e-mail] Sat Dec 21 12:37:41 1996
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From: Dennis Breeden <[e-mail]>
Newsgroups: rec.ham-radio,rec.radio.amateur,rec.radio.amateur.antenna,rec.radio.amateur.equipment,rec.radio.amateur.misc
Subject: Re: Setting up an antenna tower.
Date: Tue, 17 Dec 1996 21:52:13 +0000
Organization: Reuter
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David P. Hummel, Jr. wrote:
>
> I have recently come to own a previously used antenna tower.  After months
> of hard work, I managed to finally get it out of the ground.  That was the
> hard part.  But here is the fun part.  Anybody have any ideas how I can dig
> a hole in the ground that is about 2.5ft in diameter and about 6.5ft deep?
> I tried a post hole digger, but the bits are only about 4 ft deep?   Any
> suggestions?
>
> Thank you in advance.
> David P. Hummel, Jr.
> KG2BXI have used a spade shovel to break up the dirt and a military trenchin
g
tool to scoop the dirt.  Not easy but it does work.


From [e-mail] Sat Dec 21 12:37:42 1996
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From: [e-mail] (Jeffrey Herman)
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.equipment,rec.radio.amateur.misc
Subject: Re: Setting up an antenna tower.
Date: 18 Dec 1996 03:14:05 GMT
Organization: University of Hawaii
Lines: 11
Message-ID: <597nht$[e-mail]>
References: <01bbeb67$8fcce7b0$0fb919ce@davidh> <[e-mail]>
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Just to let everyone know, there is an email list devoted to towers.
Send an email to [e-mail] and only write:
subscribe
and you'll be hooked up. Remove the "-request" in the above address
to post.

73,
Jeff

P.S. Of vital importance, use the command     unsubscribe    to that
request address above when you want to unsub.


From [e-mail] Sat Dec 21 12:37:43 1996
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From: [e-mail] (David Harmon)
Subject: Re: Setting up an antenna tower.
Message-ID: <[e-mail]>
Organization: NETCOM On-line Communication Services (408 261-4700 guest)
References: <01bbeb67$8fcce7b0$0fb919ce@davidh> <[e-mail]>
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Xref: news1.epix.net rec.radio.amateur.antenna:32873 rec.radio.amateur.misc:121029

In article <[e-mail]>,
Bill Wyatt  <[e-mail]> wrote:
>
>Having spent some time in the world of construction, the way I see it
>you have 2 choices.  1.  Gat a shovel and someone with a small kester
>that can dig and fit into a 2.5 ft. hole.  Yes, I know it is not very
>likely but, it is a way.  2. Talk with the local electric company. They

A few months ago, I saw a shovel in a hardware store that was just made
for such purposes.  It had a round spoon-like scooper about 10 inches in
diameter, on the end of a handle about 12 feet long.  That's all I remember.

(Newsgroups trimmed.)


From [e-mail] Sat Dec 21 12:37:44 1996
Newsgroups: rec.ham-radio,rec.radio.amateur,rec.radio.amateur.antenna,rec.radio.amateur.equipment,rec.radio.amateur.misc
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From: John Fakan <[e-mail]>
Subject: Re: Setting up an antenna tower.
Message-ID: <[e-mail]>
Date: Thu, 19 Dec 1996 22:48:08 -0500
References: <01bbeb67$8fcce7b0$0fb919ce@davidh> <[e-mail]>
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Bill Wyatt wrote:
>
> David P. Hummel, Jr. wrote:
> >
>  Anybody have any ideas how I can dig
> > a hole in the ground that is about 2.5ft in diameter and about 6.5ft deep?
> > I tried a post hole digger, but the bits are only about 4 ft deep?   Any
> > suggestions?
> >
> > Thank you in advance.
> > David P. Hummel, Jr.
> > KG2BX
>
> Good day one and all.......
>
> David as for the backhoe, forget it......I've spent a number of years
> running one and unless you have one of the really small ones, you can't
> dig a hole 2.5 ft. in diameter and 6.5 ft. deep.  It just can't happen
> and leave the surrounding ground undisturbed.  Sorry.
>
> Having spent some time in the world of construction, the way I see it
> you have 2 choices.  1.  Gat a shovel and someone with a small kester
> that can dig and fit into a 2.5 ft. hole.  Yes, I know it is not very
> likely but, it is a way.  2. Talk with the local electric company. They
> have a truck that is used to set electric poles which has an auger that
> can dig a round hole.  Most of these trucks will dig somewhere between
> 18 and 30 in..  Some have differant sized augers to dig the needed dia.
> hole.
>
> If you can talk them into digging the hole you may have to exchange
> diameter for depth.  I'm sure there are some eng. type folks out there
> that can give you the numbers but, I would thing 18-20 in. dia. and 8-9
> ft. deep would be a good exchange for the requested 2.5 ft. x 6.5 ft..
> Remember, put some re-bar steel in the cement base to hold the thing
> together.
>
> Hope this helps......and please I'm not trying to put anyone down on the
> backhoe deal.....It's just that the physics of the way they dig that
> won't let them do this paticular job.
>
> 73's and good luck with your tower.......
>
> Bill   N5WO


When I was a kid the electric companies did not have truck-mounted augers and
dug all of
the holes for telephone and power poles by hand.  I have watched them do many
and
remember well the tools they used.  One long-handled spade was used (intermitt
antly with
a very long crow-bar) to loosen the dirt (usually hard clay with imbedded rock
s).
Another long handled shovel had much of the blade formed to a ninety-degree an
gle so as
to provide a means for lifting the loosened dirt out of the hole.  As I recall
 the holes
were at least six foot deep or considerably deeper.  Two men would easily dig
two or
three holes per shift.

For a single hole I would expect you could make do with some jerry-rigged equi
valents of
the tools I described above.  The technique is the thing. Loosen a few inches
of the
packed earth and then lift it out of the hole. And then just keep at it until
you have
reached your goal.

John Fakan




From [e-mail] Sat Dec 21 12:37:45 1996
Newsgroups: rec.ham-radio,rec.radio.amateur,rec.radio.amateur.antenna,rec.radio.amateur.equipment,rec.radio.amateur.misc
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From: [e-mail] (Gary Coffman)
Subject: Re: Setting up an antenna tower.
Message-ID: <[e-mail]>
Reply-To: [e-mail] (Gary Coffman)
Organization: Destructive Testing Systems
References: <01bbeb67$8fcce7b0$0fb919ce@davidh> <[e-mail]>
Date: Fri, 20 Dec 1996 22:10:08 GMT
Lines: 58
Xref: news1.epix.net rec.radio.amateur.antenna:32986 rec.radio.amateur.equipment:44745 rec.radio.amateur.misc:121243

In article <[e-mail]> Art or Betty Eberle <[e-mail]
t> writes:
>David P. Hummel, Jr. wrote:
>>
>> I have recently come to own a previously used antenna tower.  After months
>> of hard work, I managed to finally get it out of the ground.  That was the
>> hard part.  But here is the fun part.  Anybody have any ideas how I can dig
>> a hole in the ground that is about 2.5ft in diameter and about 6.5ft deep?
>> I tried a post hole digger, but the bits are only about 4 ft deep?   Any
>> suggestions?
>>
>> Thank you in advance.
>> David P. Hummel, Jr.
>> KG2BX
>
>Why dig a hole 6.5 ft. deep?  Unless the tower is really tall and self
>supporting, you would be better with a hole about 3'x3'x3'.  Suggest you
>try to get hold of a copy of the Rohn or Heights tower manual.  They
>give suggestions on how to design and make tower bases.
>
>If the tower is guyed, you can get by with a much smaller base.

The size of the base needed depends very much on local soil mechanics.
The tower base serves two purposes. It bears the weight of the tower,
and any loading that guys may impose. And it serves to resist the
overturning moment of the tower. Different soils can support different
ground pressures, and different soils have different resistances to
shear. There is no "one size fits all" for this sort of thing, but
in general deeper is better than wider.

Now my tower has almost a full section buried. In other words the
hole is 10 feet deep and has 2 feet of aggregate in the bottom. I
dug it by hand with a posthole digger. Not with an auger, with a
real posthole digger. I started the hole with the regular handles,
and changed to longer handles as the hole got deeper. It took two
leisurely mornings to finish (too hot to dig in the afternoon).

For a 6.5 foot hole, the standard handles will suffice. You just
have to get down and reach into the hole a bit to work them when
you get down near the bottom, the standard handles are about 5.5
feet long. It will help if you replace one of the wooden handles
with 1 inch galvanized water pipe, however, because the extra weight
makes the posthole digger dig better. Even in the hardpan clay here,
I can just drop the digger in the hole to get a bite, close the blades
with the handles, and lift out the dirt. That's a lot easier than
having to muscle the blades into the ground.

If you've never seen a real posthole digger, it is like two tile
spades facing each other, joined with a pivot near the bottom.
You drop it in the hole, spread the handles, which brings the
spades together trapping dirt between them, and lift it out of
the hole. Repeat as necessary until you are done.

Gary
--
Gary Coffman KE4ZV          |    You make it,     | Due to provider problems
Destructive Testing Systems |    we break it.     | with previous uucp address
es
534 Shannon Way             |    Guaranteed!      | Email to [e-mail]
Lawrenceville, GA 30244     |                     |


From [e-mail] Sat Dec 21 12:37:46 1996
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From: [e-mail] (Brian Zeiler)
Newsgroups: sci.physics,rec.radio,rec.radio.amateur.antenna
Subject: Solution to my easy AM radio question
Date: 18 Dec 1996 20:16:03 -0700
Organization: Project Sigma
Lines: 14
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
Reply-To: [e-mail]
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I found the solution -- Real Audio broadcasts!  No fuss, no muss.  Now
I can hear the Bucks blowing their 11 point lead against the Lakers at
one point to being down by 4 near the end of the 3rd quarter.

Thanks for all the suggestions!
____________________________________________________________________________

                    Science, Logic, and the UFO Debate:
               http://www.primenet.com/~bdzeiler/index.html
                           -----------------------
"Form 8-R must be completed by persons listed in Item 9a of Form 7-R or Items
4a or 6a on Schedule D, and by all persons listed in Item 10 of Form 7-R and
by all persons applying for registration as an AP of a CPO or CTA."
                                        -- CFTC Regulatory Guide
____________________________________________________________________________


From [e-mail] Sat Dec 21 12:37:47 1996
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From: [e-mail] (david l. thompson)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Sommer Beams etc..
Date: Thu, 12 Dec 1996 23:46:36 GMT
Organization: MindSpring Enterprises, Inc.
Lines: 15
Message-ID: <58q4nc$[e-mail]>
References: <01bbe7ea$4ddb45c0$[e-mail]>
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"Len Umina" <[e-mail]> wrote:

>Does anyone have any experience with Sommer beams?  I'd like to hear from
>you.

>Thanks,
>Len

N4VZ and KM1E both use the big Sommer.  Ask them.

Dave K4JRB

>N1LU




From [e-mail] Sat Dec 21 12:37:48 1996
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From: [e-mail] ("Anthony R. Gold")
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Sommer Beams etc..
Date: Sun, 15 Dec 96 19:58:13 GMT
Organization: Microvest Limited, London
Lines: 37
Message-ID: <[e-mail]>
References: <01bbe7ea$4ddb45c0$[e-mail]>
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In article <01bbe7ea$4ddb45c0$[e-mail]>
           [e-mail] "Len Umina" writes:

> Does anyone have any experience with Sommer beams?  I'd like to hear from
> you.

I have an XP-807 and I would not recommend it.  The antenna appears
to be well engineered electrically and it performs okay although I've
made no measurements.  I've not managed to resonate the antenna
adequately on 40m and I haven't even tried to resonate 30m yet.  Both
of those bands were WAY off when built to the drawing dimensions.

The materials all appear to be of the very highest quality but it
just doesn't fit together sensibly. Indeed I have the distinct
impression that no one ever even tried to build one just like mine
before.  I even doubt that fully assembled mechanical drawings exist
or the problems would have been caught. I did hear from someone else
that Alf changes the designs frequently and that very few, perhaps
none, are exactly alike to one another.

There were silly and unecessary annoyances such as securing bolts
fouling the phasing lines and the fact that none of the mast clamping
bolts could be tightened adequately because all the bolt heads were
inaccessable to hold fast while tightening their nuts. The only way I
could tighten the nuts even partially was to put a gripping wrench
onto the shafts of the bolts to provide some resistance.  Yuck!

This is a top price antenna and I had expected better testing and
debugging of the assembled mechanical design when I ordered it.  If I
were to start again I'd probably look far closer at the KLM's.

Regards,
--
   Tony - G3SKR / W2TG                   email: [e-mail]
                                                [e-mail]
                                        packet: g3skr@n0ary.#nocal.ca.usa.na



From [e-mail] Sat Dec 21 12:37:49 1996
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From: Marty Gulseth <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Source Needed: Antenna Stuff
Date: Fri, 13 Dec 1996 13:34:46 -0800
Organization: Hewlett-Packard Spokane Division
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Hello All,

For some "mad scientist" antenna experiments - I'm looking for
components. The
application is a "remote switch" for some open-wire fed antennas, with
coax as
a balanced feeder (re numerous recent threads.) Coax is for convenience
and
esthetics - yes, I know open-wire to the tuner is best!

Price is IMPORTANT! This whole thing may be tossed into the proverbial
cocked
hat, so I wanna stay as inexpensive as possible.

Where can I find:

1. Several open frame relays, DPDT, with "hefty" contact ratings? Exact
contact
rating is unimportant - same with coil voltage, but I prefer 12VDC. Must
be able
to connect directly to points and wiper, don't want "jumpers" on the
relay.

2. (Long shot, I know) Short run (< 50') of 93 ohm coax - I think it's
RG-62 or
RG-63, no book handy. If I can't find any of this inexpensively, I'll
retreat to
75 ohm CATV stuff.

Any ideas? Many thanks!

(I prefer replies privately, as I don't think this warrants the
bandwidth of a
protracted debate!)

Marty - W7LEJ (Spokane, WA)


From [e-mail] Sat Dec 21 12:37:50 1996
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From: [e-mail] (Bea and Marvin Jones)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Source Needed: Antenna Stuff
Date: 14 Dec 1996 22:34:00 GMT
Organization: Rocky Mountain Internet - (800) 900-RMII
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X-Newsreader: TIN [version 1.2 PL2]

Marty Gulseth ([e-mail]) wrote:
: Hello All,

: Where can I find:


: 2. (Long shot, I know) Short run (< 50') of 93 ohm coax - I think it's
: RG-62 or
: RG-63, no book handy. If I can't find any of this inexpensively, I'll
: retreat to
: 75 ohm CATV stuff.

You should be able to get the RG-62 from surplus or scrap outlets.
Several years ago the fire code required that all cabling in commercial
buildings 'come up to code' :  the old jacketing was out, and new jacket
material was in -- all for out-gassing under fire conditions.

Anyway, one of my clients literally filled a dumpster with the stuff
they pulled out of their ceilings and crawl spaces.  I took as much as I
could stuff into my trunk each day until the trash picker-uppers took
what was left.  I used it for 1/2-wave 46 ohm matching sections for
feeding field day verticals, and, _please_ don't cry, Marty, I used it
for radials for the field day verticals and my vertical at home.

I have since heard of others 'falling into' this stuff.
It CAN be found -- and, dirt cheap.
Good luck.

73
Jonesy W3DHJ
Gunnison, Co
__
SK


From [e-mail] Sat Dec 21 12:37:51 1996
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From: [e-mail] (Ed Griffin)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Source Needed: Antenna Stuff
Date: Sun, 15 Dec 1996 00:36:50 GMT
Organization: Info Avenue INTERNET Access
Lines: 20
Message-ID: <32b34791.18271625@news>
References: <[e-mail]> <58va0o$[e-mail]>
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X-Newsreader: Forte Free Agent 1.1/16.230

RG62A/U from The Wire Man ($0.19) ..... 1-800-727-9473



[e-mail] (Bea and Marvin Jones) wrote:

>Marty Gulseth ([e-mail]) wrote:
>: Hello All,
>
>: Where can I find:
>
>
>: 2. (Long shot, I know) Short run (< 50') of 93 ohm coax - I think it's
>: RG-62 or
>: RG-63, no book handy. If I can't find any of this inexpensively, I'll
>: retreat to
>: 75 ohm CATV stuff.
>




From [e-mail] Sat Dec 21 12:37:52 1996
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From: [e-mail] (Dennis / Vivian Ashworth)
Newsgroups: rec.radio.amateur.antenna
Subject: Static Charge "Management"
Date: 18 Dec 96 11:55:30 GMT
Organization: ucsd usenet gateway
Lines: 9
Message-ID: <[e-mail]>
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]

There have been threads on other forums recently concerning damage caused to
PIN diodes and other solid state circuitry from static charge buildup on
antennas. The condition has been noted here on my 80M, 3/8 wave vertical and
the resultant arcs can be dramatic. What are the best approaches one could
take to manage these charges? An RF choke across the low-Z feed point? Others?

Dennis, K7FL
[e-mail]



From [e-mail] Sat Dec 21 12:37:53 1996
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From: "William E. Sabin" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Static Charge "Management"
Date: Wed, 18 Dec 1996 08:40:25 -0800
Organization: none
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Dennis / Vivian Ashworth wrote:
>
> There have been threads on other forums recently concerning damage caused to
> PIN diodes and other solid state circuitry from static charge buildup on
> antennas. The condition has been noted here on my 80M, 3/8 wave vertical and
> the resultant arcs can be dramatic. What are the best approaches one could
> take to manage these charges? An RF choke across the low-Z feed point? Other
s?

I have used this method with good success. I use a large 4 mH
transmitting-type choke (flea market) at a 50 ohm point that has no
*series* resonances (called "suck-outs") in any of the HF ham bands. It
leaks off static charges that build up slowly.

Bill W0IYH


From [e-mail] Sat Dec 21 12:37:54 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Static Charge "Management"
Date: 18 Dec 1996 16:54:45 GMT
Organization: DigiPhone Corporation, Bryan/College Station Texas 409-693-8885
Lines: 44
Message-ID: <5997kl$[e-mail]>
References: <[e-mail]>
Reply-To: [e-mail]
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X-Newsreader: IBM NewsReader/2 2.0

In <[e-mail]>, [e-mail] (Dennis
/ Vivian Ashworth) writes:
>There have been threads on other forums recently concerning damage caused to
>PIN diodes and other solid state circuitry from static charge buildup on
>antennas. The condition has been noted here on my 80M, 3/8 wave vertical and
>the resultant arcs can be dramatic. What are the best approaches one could
>take to manage these charges? An RF choke across the low-Z feed point? Others
?
>
>Dennis, K7FL
>[e-mail]
>

Shunt feed it with a gamma match and totally bond the base to ground.

You can use 6 inch TV twin lead mast standoffs for the spreaders with a
simple 14 Gauge twisted copper antenna wire going up through the brown
plastic for insulators.  The tap point is about 30 feet up on a conventional
quarter wave mast, don't know where yours will be.  Use spare RG-8U or
whatever for a pad capacitor if you can't find a 300 Mmf variable with an
eighth inch or so spacing.  Use the sbield of the coax for one lead of the
capacitor and the inside lead for the other one.  That way you can use
almost any value smaller variable in the junk box for the trim tune process.

Except for how you get up there to adjust the tap point up or down to get
the impedance just right, the whole process can't cost you but a few bux and
a little time to try the idea.  If you like it, make the connections heavier
to the ground plane under you and pretty it up.

Once you have been converted, face your local broadcast station and kneel
down and pray to it twice daily for showing you how this has worked for
them for years and years.   Don't ask if they happen to, as is done in some
of them, feed the stuff with and insulated base, some are fed that way,
but many of them are shunt fed towers, or at least folded monopoles that
are totally grounded..

    <wink>

Problem solved *AND* you get a *MUCH* better basic setup for handling
Dr. Zeus....

//-----------------------------
Mike - W5WQN
[e-mail]
[e-mail]



From [e-mail] Sat Dec 21 12:37:55 1996
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From: [e-mail] (JAMES MCEWEN)
Newsgroups: rec.radio.amateur.antenna
Subject: Subject: Ground rod and rocks... HELP!
Date: 13 Dec 96 02:11:02 GMT
Organization: ucsd usenet gateway
Lines: 31
Message-ID: <[e-mail]>
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]


   My plan is to dig a trench about a foot or 2 deep then lay the rod
horizontally since I can not drive a rod any further than about 1-2 feet.
It's the only thing I can do. There are just too many rocks, boulders under
my property to go 8 feet vertically.

Tom
                ********************************

Tom,
    You might use copper sulfate to increase the conductivity of the ground
in your area.  Copper sulfate is called "blue stone" in some places, and
dissolves easily in water.  Put two or 3 pounds of crystal in the bottom of
your trench and add some dirt then a couple of pounds more over the dirt.
Spray lightly with some water and finish covering the trench.  If you are
in a high rain area, put a little plastic over the blue stone, enough water
will get in from the sides to help disperse the copper ions. A metal pipe,
open at the end, and filled with blue stone, will also allow the copper to
move out into the soil.  Drill 3 or 4 holes a couple inches up from the
end, so the copper makes good contact with some of the outside of the pipe.
Add a 1/2 cup of water every few weeks and bluestone as needed.
     Public utilities use this method (blue stone)when establishing grounds
for their substations. All those transformers and high tension poles are
grounded together inside a substation yard. The utility establishes a grid
and bonds everything to it.  They then put a layer of insulating rockdust
over the grid.  Equipment pads and gravel fill go above the rockdust and
grid. Nothing can protect you from a lightning strike, but you can do
things to minimize the damage.

Jim KA6TPR



From [e-mail] Sat Dec 21 12:37:56 1996
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From: Michael Kassay <[e-mail]>
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SUBSCRIBE

END


From [e-mail] Sat Dec 21 12:37:57 1996
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From: Scott Ryan <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.shortwave
Subject: SWL longwire
Date: Sun, 15 Dec 1996 08:29:07 -0600
Organization: InfiNet
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I use a 75' random longwire for shortwave listening.  When I first put
it up I simply feed it with insulated wire with good results.

To improve it in regards to noise, I strung about 45' of Belden RG 58
coax as a feed line.  I soldered the center conductor to the longwire,
left the shield "open", terminated the receiver end with a PL259, then
connected the coax to the receiver's 50 ohm tap.  A lightning arrestor
is also inline.

My problem is that this setup doesn't seem much, if any, better then the
insulated wire it replaced.  It would seem that local noise would be
less & the signal would be stronger with coax.  My receiver is a SW8
which has both low "Z" & high "Z" antenna inputs.

I wonder if a longwire balun would help match the impedance & provide a
better signal?


From [e-mail] Sat Dec 21 12:37:59 1996
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From: [e-mail] (John Doty)
Newsgroups: rec.radio.amateur.antenna,rec.radio.shortwave
Subject: Re: SWL longwire
Date: 15 Dec 1996 21:50:07 GMT
Organization: MIT Center for Space Research
Lines: 57
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Xref: news1.epix.net rec.radio.amateur.antenna:32763 rec.radio.shortwave:90536

In article <[e-mail]> Scott Ryan <[e-mail]>
writes:
> I use a 75' random longwire for shortwave listening.  When I first put
> it up I simply feed it with insulated wire with good results.
>
> To improve it in regards to noise, I strung about 45' of Belden RG 58
> coax as a feed line.  I soldered the center conductor to the longwire,
> left the shield "open", terminated the receiver end with a PL259, then
> connected the coax to the receiver's 50 ohm tap.  A lightning arrestor
> is also inline.
>
> My problem is that this setup doesn't seem much, if any, better then the
> insulated wire it replaced.  It would seem that local noise would be
> less & the signal would be stronger with coax.  My receiver is a SW8
> which has both low "Z" & high "Z" antenna inputs.
>
> I wonder if a longwire balun would help match the impedance & provide a
> better signal?

The way the coax shield works is that it carries a current that
cancels the external electromagnetic field, preventing it from
reaching the inside of the shield. Leaving the shield open circuited
as you have gives this current nowhere to flow, so the shield
effectiveness is drastically reduced.

The key to effective coax use with an unbalanced antenna like a
"random wire" is grounding the shield, especially at the antenna
end. Your coax should end at a ground stake, and the antenna wire
should be brought down to ground level to connect to it. With a
balanced antenna, grounding the coax shield may also inprove
performance (but it's not as important as in the unbalanced case).

The reason that you need to bring the antenna to ground is that
you can't practically bring the ground to the antenna! The reactance
of a wire depends on its shape, diameter, and the configuration of
nearby conductors. However, for an uncoiled wire shorter than about
1/10 wavelength, the reactance is inductive and may be estimated
within a factor of two or three by 10 ohms/meter/MHz. Thus, a 1
meter ground wire at 10 MHz will have a reactance of order 100 ohms
(pretty mediocre). A ground wire must be *very* short to be effective
at HF.

Without a matching transformer (like the so-called "Magnetic Longwire
Balun"), your antenna may have deaf spots at antiresonant frequencies,
where the wire length is a multiple of 1/2 wavelength. A matching
transformer can supress the antiresonances (it also supresses the
resonances, which is normally no problem for HF receiving). Don't
however reward ignorant salesmanship by buying a "Magnetic Longwire
Balun": the ICE matching transformer is better built (by people
who actually understand how it works) and cheaper. Alternatively,
making your own is not difficult.

See "Low Noise Antennas" at "http://www.grove.net/~badx/" for more
details.

--
John Doty               "You can't confuse me, that's my job."
[e-mail]


From [e-mail] Sat Dec 21 12:38:00 1996
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From: [e-mail] (Sander Schimmelpenninck)
Newsgroups: rec.radio.amateur.antenna,rec.radio.shortwave
Subject: Re: SWL longwire
Date: 15 Dec 1996 16:41:03 GMT
Organization: iSTAR Internet Inc.
Lines: 25
Message-ID: <5919mv$[e-mail]>
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Scott: I think you need to ground the shield you left "open". You can connect
it to your antenna tower if that is what you use. It looks to me as if your
ungrounded coax just works as a wire.

Sandy
Oakville, Ontario

In article <[e-mail]>, Scott Ryan <[e-mail]>

wrote:
>I use a 75' random longwire for shortwave listening.  When I first put
>it up I simply feed it with insulated wire with good results.
>
>To improve it in regards to noise, I strung about 45' of Belden RG 58
>coax as a feed line.  I soldered the center conductor to the longwire,
>left the shield "open", terminated the receiver end with a PL259, then
>connected the coax to the receiver's 50 ohm tap.  A lightning arrestor
>is also inline.
>
>My problem is that this setup doesn't seem much, if any, better then the
>insulated wire it replaced.  It would seem that local noise would be
>less & the signal would be stronger with coax.  My receiver is a SW8
>which has both low "Z" & high "Z" antenna inputs.
>
>I wonder if a longwire balun would help match the impedance & provide a
>better signal?


From [e-mail] Sat Dec 21 12:38:01 1996
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From: [e-mail] (David Rickmers)
Newsgroups: rec.radio.amateur.antenna,rec.radio.shortwave
Subject: Re: SWL longwire
Date: Tue, 17 Dec 1996 09:38:32 GMT
Organization: Earthlink Network, Inc.
Lines: 12
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References: <[e-mail]>
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On Sun, 15 Dec 1996 08:29:07 -0600, Scott Ryan <[e-mail]>
wrote:


>I wonder if a longwire balun would help match the impedance & provide a
>better signal?
Yes and no.  Palomar has an MLB for $40 but they also have a less
elegant but beefier  12:1 "UnUn" for $10.00 less.  I recommend calling
them at 619 747 3343 and requesting a catalog.  They also have an
email address at Compuserve, but my enlarged testicles prevent me from
finding that number.
dr


From [e-mail] Sat Dec 21 12:38:02 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna,rec.radio.shortwave
Subject: Re: SWL longwire
Date: Wed, 18 Dec 1996 01:06:41 -0800
Organization: Berbee Information Networks Corporation
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Scott Ryan wrote:
>
> I use a 75' random longwire for shortwave listening.  When I first put
> it up I simply feed it with insulated wire with good results.
>
Scott, for shortwave reception, I think you will find it hard to beat
running the wire straight into the receiver, no splices in the wire. Run
it to the 500 ohm input, or the high impedance input, depending on your
rig.

> To improve it in regards to noise, I strung about 45' of Belden RG 58
> coax as a feed line.  I soldered the center conductor to the longwire,
> left the shield "open", terminated the receiver end with a PL259, then
> connected the coax to the receiver's 50 ohm tap.  A lightning arrestor
> is also inline.
>
You should not be using coax for this type of antenna setup.

> My problem is that this setup doesn't seem much, if any, better then the
> insulated wire it replaced.  It would seem that local noise would be
> less & the signal would be stronger with coax.  My receiver is a SW8
> which has both low "Z" & high "Z" antenna inputs.
>
> I wonder if a longwire balun would help match the impedance & provide a
> better signal?

If you want a great shortwave antenna, and use coax for the lead in,
make a dipole antenna. A dipole antenna is fed in the center. Contact
Amateur Electronic Supply at 800.558.0411 and buy a W2DU-HF 1:1 choke
balun for $26.00. To find the length of wire you need to make a half
wave dipole, use this formula: 468/frequency in mhz = halfwave dipole in
feet.

Example: 468/3.900 mhz = 120 feet

My dipole is 120 feet, I find it works great for all shortwave bands and
AM broadcast band as well. I picked 120 feet because I use it to
transmit in the 80 meter band. You put the balun in the center, so in
the above example you have 60 feet of wire on each side of the balun.

For safety, never run your antenna over or under power lines.



From [e-mail] Sat Dec 21 12:38:03 1996
Path: news1.epix.net!news3.epix.net!uunet!in2.uu.net!206.250.118.17!nntp.earthlink.net!usenet
From: "Christopher (Chris) W. Boone" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: T2FD - Anyone in Wis. Using One?
Date: Sun, 15 Dec 1996 09:44:51 -0800
Organization: ABC Radio Network Engineering - Dallas
Lines: 34
Message-ID: <[e-mail]>
References: <01bbe8cd$6ed7d980$e48e87d0@dell>
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Dave Rude wrote:
>
> Greetings,
>
> I have been reading good things about the tilted folded dipole.  Is anyone
> in Wisconsin using one?  I would like to talk to you to get your
> impressions of it.
>
> I am planning to build one for SWLing and or maybe for xmitting.
>
> dave
> KA9SRU
> [e-mail]

The T2FD is a wide band antenna BUT not without problems...

The antenna because of its design will have LOSS at freqs below 10 Mhz
(on 75 and 40 mtrs it can be as much as 10 db difference between the T2FD
and a standard dipole)...You would do better with a LONG dipole fed by
open feeders/ladder line or 300ohm cable and use a tuner to match it to
50 ohms.....

They are quiet because of the resistive load....In fact we studied the
B&W antenna at my former work place....we found the balun to be 16:1
(taking 50 ohms to 800 ohms)....and the resisitve load to be 600-900
ohm...with this arrangement the antenna could be anywhere from 400 to
1600 ohms load and still maintain a 2:1 SWR max on the coax.....which is
does.....BUT half you power is lost in the resistor load.....so much for
efficiency!

73
Chris
WB5ITT
(I still own mine but not using it)


From [e-mail] Sat Dec 21 12:38:04 1996
Newsgroups: rec.radio.amateur.antenna
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From: [e-mail]
Subject: test
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To: all
Sender: [e-mail] (Usenet News Owner)
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test



From [e-mail] Sat Dec 21 12:38:04 1996
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From: John Straughn <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.digital.misc,rec.radio.amateur.dx,rec.radio.amateur.space,sci.astro,sci.astro.amateur
Subject: Re: Test - Do not read
Date: 12 Dec 1996 10:16:36 GMT
Organization: U of Iowa Panda System
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In note <58jjt6$p43$[e-mail]>, [e-mail] (Paul J.
Piercey) writes:
>Test.

\MWAHAHAHAHAH  I'M A REBEL WITHOUT A CAUSE!!!
---
The Triaist




From [e-mail] Sat Dec 21 12:38:05 1996
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From: Bill Henderson <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: TET Antenna
Date: Sat, 14 Dec 1996 21:55:40 GMT
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I've been offered a second hand HB443DX.

Has anyone experience of this 4 bander?
--
Bill       Br of Cally, Perthshire, Scotland
e-mail     [e-mail]
packet     GM0VIT@GB7YEW.#79.GBR.EU



From [e-mail] Sat Dec 21 12:38:06 1996
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From: [e-mail] (Michael C Fortner)
Newsgroups: rec.radio.amateur.antenna
Subject: Tree antenna for 10M
Date: 16 Dec 1996 04:08:13 GMT
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I live in the ground floor of an apartment which backs up against a hill.
There are a couple of trees nearby that I thought of using as an antenna, and
I remember seeing how to do that on the net once.  Does anybody know how to
use a tree for an antenna on 10M?

Thanks

Michael

--
------------------------------------------------------------------------------
|  Michael C. Fortner               |  When in doubt, roll in a grenade and  |
|  [e-mail]                |  come in firing.                       |
|  [e-mail]              |         - J. Michael Straczynski       |
|  http://www2.netdoor.com/~n0ybc/  |----------------------------------------|
|  N0YBC/5      MSTie #54400        |        Smoke 'em if ya got 'em!        |
------------------------------------------------------------------------------


From [e-mail] Sat Dec 21 12:38:07 1996
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From: Alan Hackney <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Twin Lead
Date: Fri, 20 Dec 1996 12:46:46 -0500
Organization: River Rat's
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I ran across a huge roll of twin lead , was used for an old computer
network , How can I calculate the impedence of this cable ?
Alan KE4OOI   [e-mail]


From [e-mail] Sat Dec 21 12:38:08 1996
From: [e-mail] (Don Phelps)
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Newsgroups: rec.radio.amateur.antenna
Subject: Re: Using coax as a balan
Message-ID: <[e-mail]>
Date: Sun, 15 Dec 1996 18:35:24 GMT
Distribution: world
Organization: The Infoway BBS [phone] 28,800 8-N-1
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My foot! Your foot, line foot, coax foot, whose foot???
Merry Xmas folks.

 >If we have a short *balanced* line segment consisting of two coaxes...

 W8> It probably was, but connecting the cables in series doubles the loss
 W8> per foot if the line is perfectly matched in each case. If the system
 W8> had high standing waves, I'd sure keep the coaxial lines as short as
 W8> possb.

Since each foot of "line segment" has two feet of coaxes, the statement
that it "doubles the loss per foot" is ambiguous as to whether
the loss is doubled per foot of "line segment" and therefore
constant per foot of coax, or doubled per foot of coax and therefore
...(quadripled?) per foot of line segment.

The answer is in a series circuit, all the power flows through
each series element, it is not divided, therefor the loss per
foot of coax remains constant, and the loss per foot of line
segment doubles.

With this much BS on the newsgroup, who needs an antenna anyway.

73, Don N6MCE


... [e-mail]  1:125/104 POBox 9739 San Rafael,CA 94912
___ Blue Wave/386 v2.30 [NR]


From [e-mail] Sat Dec 21 12:38:09 1996
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From: Frank Krozel <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Using coax as a balanced feeder
Date: Thu, 12 Dec 1996 13:17:39 -0800
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It seems this is the "in" way to go for an alternate feed.  Has any one
out there used a 160 meter loop or 80 meter loop on 40 meters, feeding
with two 50 ohm coax lines driven in parallel?  I have seen text that
the second harmonic of the fundamental (running 80 on a 160 loop or
running 40 on a 80 meter loop) does not work.... Anyone had any
experience with this type of situation???  Frank KG9H


From [e-mail] Sat Dec 21 12:38:09 1996
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From: [e-mail] (Steve Ellington)
Subject: Re: Using coax as a balanced feeder
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: I'm curious. What advantage is two pieces of coax supposed to have over a
: single coax or ladder line (in addition to its "in"-ness, of course)?

The balance is maintained plus it can be buried, run over metal and
through the wall with no special precautions

: Putting two pieces of 50 ohm coax in parallel makes the equivalent of a
: single coax line of 25 ohm impedance. Why use that to feed a loop?

No. It's 100 ohms. Use RG-62 to get 200 ohms

--
Steve Ellington [e-mail]  Louisville, Ky


From [e-mail] Sat Dec 21 12:38:10 1996
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From: Cecil Moore <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Using coax as a balanced feeder
Date: Fri, 13 Dec 1996 14:10:56 -0800
Organization: Intel Corporation
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Roy Lewallen wrote:
> Putting two pieces of 50 ohm coax in parallel makes the equivalent of a
> single coax line of 25 ohm impedance. Why use that to feed a loop?

Hi Roy, I think he is talking about two parallel runs of coax in
series with the load, in which case the impedance would be doubled,
i.e. 50 ohm coax would yield 100 ohm characteristic impedance, good
for feeding some loops.

73, Cecil, W6RCA, OOTC


From [e-mail] Sat Dec 21 12:38:11 1996
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From: [e-mail] (Roy Lewallen)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Using coax as a balanced feeder
Date: Fri, 13 Dec 96 09:28:08 GMT
Organization: EZNEC Antenna Software
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In article <[e-mail]>,
   Frank Krozel <[e-mail]> wrote:
>It seems this is the "in" way to go for an alternate feed.  Has any one
>out there used a 160 meter loop or 80 meter loop on 40 meters, feeding
>with two 50 ohm coax lines driven in parallel?  I have seen text that
>the second harmonic of the fundamental (running 80 on a 160 loop or
>running 40 on a 80 meter loop) does not work.... Anyone had any
>experience with this type of situation???  Frank KG9H

I'm curious. What advantage is two pieces of coax supposed to have over a
single coax or ladder line (in addition to its "in"-ness, of course)?

Putting two pieces of 50 ohm coax in parallel makes the equivalent of a
single coax line of 25 ohm impedance. Why use that to feed a loop?

Roy Lewallen, W7EL


From [e-mail] Sat Dec 21 12:38:12 1996
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From: Cecil Moore <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Using coax as a balanced feeder
Date: Fri, 13 Dec 1996 16:03:39 -0800
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Steve Ellington wrote:
> No. It's 100 ohms. Use RG-62 to get 200 ohms

No. It's 186 ohms. (The devil made me do it :-)

73, Cecil, W6RCA, OOTC


From [e-mail] Sat Dec 21 12:38:13 1996
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From: Mike Merk <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Using coax as a balanced feeder
Date: Thu, 12 Dec 1996 18:19:58 -0600
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Steve Ellington wrote:
>
> : I'm curious. What advantage is two pieces of coax supposed to have over a
> : single coax or ladder line (in addition to its "in"-ness, of course)?
>
> The balance is maintained plus it can be buried, run over metal and
> through the wall with no special precautions
>
> : Putting two pieces of 50 ohm coax in parallel makes the equivalent of a
> : single coax line of 25 ohm impedance. Why use that to feed a loop?
>
> No. It's 100 ohms. Use RG-62 to get 200 ohms
>
> --
> Steve Ellington [e-mail]  Louisville, Ky
Steve,
I blieve Mr. LeWellen is correct.  The applications I have seen use the
two center conductors in parrallel to get 100 ohms.  If you parallel the
coax, I believe you get a 25 ohm characteristic impedance.

Mike - K4UPL


From [e-mail] Sat Dec 21 12:38:14 1996
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From: "William E. Sabin" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Using coax as a balanced feeder
Date: Fri, 13 Dec 1996 09:12:52 -0800
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Steve Ellington wrote:
>
>
> The balance is maintained plus it can be buried, run over metal and
> through the wall with no special precautions
>

If we have a short *balanced* line segment consisting of two coaxes, with
their braids tied together, then the braid is at zero potential wrt
ground (if the line is balanced wrt ground). We can then use this segment
to go through a metal surface (for example a window frame) and connect
the braid to this surface with no effect on performance. This would be an
alternative to feedthru insulators, which may not be feasible in some
situations. I believe that was the original objective in this thread.

Bill W0IYH


From [e-mail] Sat Dec 21 12:38:15 1996
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From: "William E. Sabin" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Using coax as a balanced feeder
Date: Sat, 14 Dec 1996 10:02:13 -0800
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[e-mail] wrote:
>
> In article <[e-mail]>, "William E. Sabin"
> <[e-mail]> writes:
>
> >We can then use this segment
> >to go through a metal surface (for example a window frame) and connect
> >the braid to this surface with no effect on performance. I believe
> > that was the original objective in this thread.
> >

> It probably was, but connecting the cables in series doubles the loss per
> foot if the line is perfectly matched in each case.

If we have two cables in series, then Z0 doubles and for a fixed power
level the current in each wire is reduced to 1/sqrt(2), so the I^2*R in
each cable is 1/2 and for two wires the total I^2*R is the same. Do you
agree, Tom?

Please say yes, because I need to win one for a change, Tom. I just keep
losing all the time. It's boring.

How have you been?

Bill W0IYH


From [e-mail] Sat Dec 21 12:38:16 1996
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From: [e-mail](-=Tony=-)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Using coax as a balanced feeder
Date: 14 Dec 1996 01:52:56 GMT
Organization: Netcom
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In <[e-mail]> Cecil Moore
<[e-mail]> writes:
>
>Steve Ellington wrote:
>> No. It's 100 ohms. Use RG-62 to get 200 ohms
>
>No. It's 186 ohms. (The devil made me do it :-)
>
>73, Cecil, W6RCA, OOTC

    Yeah, but ...RG-62 is kinda lossy (from memory) plus look at
that thin-thin center conductor <G>.  Not much current capability
there, eh?

    Seriously, as I recall, RG-62 was never designed for power
handling and was used mainly in instrumentation/experimental work.
But, I may have missed some stuff along the way.

    Take care,  73

    -=Tony=-    W6ANV




From [e-mail] Sat Dec 21 12:38:17 1996
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From: [e-mail] (Jan Anker)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Using coax as a balanced feeder
Date: Sun, 15 Dec 1996 02:52:00
Organization: EUnet Belgium, Leuven, Belgium
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In article <[e-mail]> [e-mail] wri
tes:


>It probably was, but connecting the cables in series doubles the loss per
>foot if the line is perfectly matched in each case.

No, no! The loss/ft stays the same. You are dividing the power over the two
lines, each with their equal loss.
So 100W with 50pct loss in a single 50ohm cable outputs 50W compared to:
A 50ohm cable in series, in each leg 50w-50pct =25w times 2 is 50W out

>If the system had high
>standing waves, I'd sure keep the coaxial lines as short as possb.
ok

Jan


From [e-mail] Sat Dec 21 12:38:18 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Using coax as a balanced feeder
Date: 15 Dec 1996 02:47:40 GMT
Organization: AOL http://www.aol.com
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In article <[e-mail]>, "William E. Sabin"
<[e-mail]> writes:

>
>If we have two cables in series, then Z0 doubles and for a fixed power
>level the current in each wire is reduced to 1/sqrt(2), so the I^2*R in
>each cable is 1/2 and for two wires the total I^2*R is the same. Do you
>agree, Tom?
>
>Please say yes, because I need to win one for a change, Tom. I just keep
>losing all the time. It's boring.
>
>How have you been?
>
>Bill W0IYH

Good Bill,

Hope you and everyone else on here has a good xmas.

Yes, I thought about that today while I was raking leaves. In parallel the
loss is the same with one or more lines in parallel if the system is
matched to each new impedance. Two lines in parallel would each have half
the power applied to each line, with the same amount of loss (in dB or
percentage) in each line. When they are summed again, the total loss is
the same as with one line by itself.

In series, I thought with 3 dB per 100 feet, why wouldn't the signal path
be twice as long for a total of 6 dB loss?

The power in each line! Each line has half the power, so the loss is still
3 dB!

The loss remains the same seems more reasonable to me, at least at the
moment! It may not in the morning.

73 Tom


From [e-mail] Sat Dec 21 12:38:19 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Using coax as a balanced feeder
Date: 15 Dec 1996 14:44:39 GMT
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In article <[e-mail]>,
[e-mail] writes:

>
>The loss remains the same seems more reasonable to me, at least at the
>moment! It may not in the morning.
>
>

It's morning and I still think you are right Bill, and I was wrong. Losses
remain the same with two cables in parallel or in push-pull as long as the
impedance is matched.

You have won.
:-)
73
Tom


From [e-mail] Sat Dec 21 12:38:20 1996
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From: "William E. Sabin" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Using coax as a balanced feeder
Date: Sun, 15 Dec 1996 10:33:13 -0800
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[e-mail] wrote:
>
>
> It's morning and I still think you are right Bill, and I was wrong.

Have a good morning, Tom. And the rest of the day also.

Bill


From [e-mail] Sat Dec 21 12:38:21 1996
Newsgroups: rec.radio.amateur.antenna
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From: John Fakan <[e-mail]>
Subject: Re: Using coax as a balanced feeder
Message-ID: <[e-mail]>
Date: Sun, 15 Dec 1996 18:29:58 -0500
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-=Tony=- wrote:
>
> In <[e-mail]> Cecil Moore
> <[e-mail]> writes:
> >
> >Steve Ellington wrote:
> >> No. It's 100 ohms. Use RG-62 to get 200 ohms
> >
> >No. It's 186 ohms. (The devil made me do it :-)
> >
> >73, Cecil, W6RCA, OOTC
>
>     Yeah, but ...RG-62 is kinda lossy (from memory) plus look at
> that thin-thin center conductor <G>.  Not much current capability
> there, eh?
>
>     Seriously, as I recall, RG-62 was never designed for power
> handling and was used mainly in instrumentation/experimental work.
> But, I may have missed some stuff along the way.
>
>     Take care,  73
>
>     -=Tony=-    W6ANV

Tony,

RG-62 is the standard coax cable used for ARC-Net networks.  It has been all b
ut
replaced by Ethernet and Token Ring. I have personally tossed a great deal of
it in the
past year.

John Fakan, KB8MU




From [e-mail] Sat Dec 21 12:38:22 1996
From: [e-mail] (Hugh Duff)
Newsgroups: rec.radio.amateur.antenna
Subject: Veritcal vs. G5RV ???
Date: Sat, 21 Dec 1996 03:45:42 GMT
Organization: ICA Canada
Reply-To: [e-mail]
X-Newsreader: Forte Free Agent 1.0.82
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Message-ID: <[e-mail]>
Lines: 21
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I'd like to hear from some experienced HFers...
I will soon errect a modest antenna for HF.  Just wondering what would
perform better  (I own both but only wish to put up one of them)...

A  G5RV strung out in an inverted-V configuration that is raised to
about 50' at the feedpoint with each leg running out to the corners of
the backyard   OR   a vertical antenna at ground level in the center
of the backyard with radials buried under the soil ?

I'm aware that the vertical offers a lower angle of radiation which is
ideal for DXing however  I'm leaning towards the G5RV since I'm
reluctant to the thought of greatly reducing  the usuable space in the
backyard once the vertical is installed.
I'm not much of a DX chaser anyway...my HF operation is more casual.
I just wonder after all considered if the G5RV would be a  compromise
compared to the vertical.

Thanks de Hugh, VA3TO





From [e-mail] Sat Dec 21 12:38:23 1996
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From: Jim Leder <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Veritcal vs. G5RV ???
Date: Sat, 21 Dec 1996 08:42:07 -0800
Organization: OneNet Communications HUB News Server
Lines: 8
Message-ID: <[e-mail]>
References: <[e-mail]>
Reply-To: [e-mail]
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To: [e-mail]

I would go with the G5RV. The vertical would out perform the G5RV on
long haul contacts, but only if you have a very good radial system under
it. I have a G5RV in the configuration you are contemplating, except
mine is only 35' up in the center. I have also had verticals (my 4BTV is
in the attic) with only a fair radial system (35 radials). The vertical
allowed me to work quite a bit of DX with 35 watts, but the G5RV was far
better on the short haul stuff (stateside). It also gave me 75/80 mtrs.
The vertical didn't. Good luck....Jim


From [e-mail] Sat Dec 21 12:38:24 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Veritcal vs. G5RV ???
Date: Sat, 21 Dec 1996 09:44:18 -0600
Organization: AT&T WorldNet Services
Lines: 32
Message-ID: <[e-mail]>
References: <[e-mail]>
Reply-To: [e-mail]
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X-Mailer: Mozilla 3.0 (Win95; I)

Hugh Duff wrote:
>
> I'd like to hear from some experienced HFers...
> I will soon errect a modest antenna for HF.  Just wondering what would
> perform better  (I own both but only wish to put up one of them)...
>
> A  G5RV strung out in an inverted-V configuration that is raised to
> about 50' at the feedpoint with each leg running out to the corners of
> the backyard   OR   a vertical antenna at ground level in the center
> of the backyard with radials buried under the soil ?
>
> I'm aware that the vertical offers a lower angle of radiation which is
> ideal for DXing however  I'm leaning towards the G5RV since I'm
> reluctant to the thought of greatly reducing  the usuable space in the
> backyard once the vertical is installed.
> I'm not much of a DX chaser anyway...my HF operation is more casual.
> I just wonder after all considered if the G5RV would be a  compromise
> compared to the vertical.
>
> Thanks de Hugh, VA3TO

If you're interested in casual, all around operation/rag-chewing, I'd go
with the dipole.  There's certainly more aspects of the question we're
ignoring, but for a quick un-complicated answer, I think most people
will suggest the dipole under those conditons.

Ideally, I'd use both.  I've done it without a whole lot of problems
(won't get into the technical aspects here).  It was a nice arrangement
because sometimes the vertical worked better for a particular situation,
sometimes the dipole...switching was as simple as my a/b switch.

Good luck whatever you choose...


From [e-mail] Sat Dec 21 12:38:24 1996
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!news.sprintlink.net!news-pen-4.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!newsfeed.internetmci.com!metro.atlanta.com!cpk-news-feed3.bbnplanet.com!news.ipass.net![e-mail]
From: David Cooley <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Vertical antenna properties
Date: Sat, 21 Dec 1996 09:54:32 -0500
Organization: IPass.net
Lines: 10
Message-ID: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: customs32.ipass.net
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
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X-Mailer: Mozilla 3.0 (Win95; I)

Could someone post, or point me in the right direction to, properties of
vertical antennas by 1/8 wavelength increments, IE: feed impedance,
radiation patterns, Dbd gain etc.
Thanks,
Dave
--
=================================================================
David Cooley           A.K.A. N5XMT            [e-mail]
http://www.ipass.net/~cooldave/
=================================================================


From [e-mail] Sat Dec 21 12:38:26 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.net!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!worldnet.att.net!newsadm
From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Verticals and RFI
Date: Tue, 17 Dec 1996 14:34:28 -0600
Organization: AT&T WorldNet Services
Lines: 39
Message-ID: <[e-mail]>
References: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: 207.146.218.223
Mime-Version: 1.0
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Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.0 (Win95; I)

I assume you're looking for more of a technical explanation of why some
antennas seem to cause RFI and some don't (personally I've never seen
any antenna that could claim no RFI, but...).  Unfortunately I don't
have the tech knowledge for you, but I'm willing to share my experiences
regarding the verticals I've used over the last five years here at my
QTH...

Due to a very small city lot, and no towers allowed, I'm forced to use a
vertical or "short" (about 55') dipole which I feed with open ladder
line.  I've tried different verticals over the years, including a
Hy-Gain DX88, a Cushcraft R7, a Gap Challenger, a Butternut HF6V, and a
couple others.  Where applicable, radials were used.  In addition, I use
a 8' foot ground rod at the base of the antenna and one outside the
radio room (common ground connection).

Bottom line is none on the verticals I tried had any significant effect
in reducing RFI, and in fact, produced more interference than my simple
dipole at the same output power and similar conditions.

Plus side by side comparisons with different stations over the years
have convinced me that there is no significant difference between the
expensive verticals and a dipole, but I won't get on a tangent about
verticals vs. dipoles (that's been beaten to death :) ).

Bottom, bottom, line...in my humble opinion and experience, there is no
significant difference between the different verticals I've tried and
the amount of RFI they produce.  They all do it.  May have something to
do with vertically polarized waveforms as opposed to horizontal...or
something like that...

If you want to do yourself (and your wallet) a favor, put up a dipole
and let it go at that until you can put up a tower.

Have a great holiday season!

John


John


From [e-mail] Sat Dec 21 12:38:27 1996
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From: Kory Hamzeh <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Verticals and RFI
Date: Tue, 17 Dec 1996 12:02:42 -0800
Organization: Avatar Consultants, Inc.
Lines: 33
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: avatar.avatar.com
Mime-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
In-Reply-To: <[e-mail]>



I had a gap titan and it was incredibly bad when it came to rfi. What
will help is a line isolator (current balun) placed right at the feed
point. Radio Works makes one called the T-4. I've used them on slopers
with great success.

Kory
AC6RN



On 17 Dec 1996, Dick Boley wrote:
>
> There have been postings about some verticals causing RFI while other do
> not. Specifically,
> the "normal" ground mounted verticals and "normal" counterpoise verticals
> appear, from some
> comments, to be offenders while the "vertical dipole" GAP antennas are less
> prone to cause interference.
>
> Can anyone substantiate this.  I am moving into a townhouse with a treed
> area (not common)
> behind it. I hope to place a vertical, of some kind, there about 100' from
> the townhouses. RFI
> after spending several hundred dollars would be a major disappointment.
>
> Thanks - Dick  N3HKN  Pittsburgh
>
>
>
>
>


From [e-mail] Sat Dec 21 12:38:28 1996
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From: [e-mail] (Thomas J. Farish)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Verticals and RFI
Date: Tue, 17 Dec 1996 06:24:59 -0700
Organization: LANL
Lines: 28
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: mamie.lanl.gov

In article <[e-mail]>,
[e-mail] (Dick Boley) wrote:

> There have been postings about some verticals causing RFI while other do
> not. Specifically,
> the "normal" ground mounted verticals and "normal" counterpoise verticals
> appear, from some
> comments, to be offenders while the "vertical dipole" GAP antennas are less
> prone to cause interference.
>

I use a homebrew vertical and inverted-V.  Anything more than 5w on SSB
and the vertical signal gets into my neighbor's cable TV system.  I use a
low-pass filter on my rig and built several filters for him.  I have no
trouble with my (broadcast) TV system.  On CW, it takes 60-100 W for him
to notice interference when I use the vertical.  He reports no interference
at all when I use the inverted-V!

Tom
KJ5LT

--
Thomas J. Farish, ScD
[e-mail]

I don't speak for LANL and they don't speak for me.

PGP public key available upon request


From [e-mail] Sat Dec 21 12:38:29 1996
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From: [e-mail] (Dick Boley)
Newsgroups: rec.radio.amateur.antenna
Subject: Verticals and RFI
Date: 17 Dec 96 12:08:42 GMT
Organization: ucsd usenet gateway
Lines: 21
Message-ID: <[e-mail]>
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]





There have been postings about some verticals causing RFI while other do
not. Specifically,
the "normal" ground mounted verticals and "normal" counterpoise verticals
appear, from some
comments, to be offenders while the "vertical dipole" GAP antennas are less
prone to cause interference.

Can anyone substantiate this.  I am moving into a townhouse with a treed
area (not common)
behind it. I hope to place a vertical, of some kind, there about 100' from
the townhouses. RFI
after spending several hundred dollars would be a major disappointment.

Thanks - Dick  N3HKN  Pittsburgh





From [e-mail] Sat Dec 21 12:38:29 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Verticals and RFI
Date: Wed, 18 Dec 1996 22:12:49 -0800
Organization: Pacific Bell Internet Services
Lines: 21
Message-ID: <[e-mail]>
References: <[e-mail]>
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X-Mailer: Mozilla 2.01E-PBXE  (Win16; I)

Dick Boley wrote:
>
> There have been postings about some verticals causing RFI while other do
> not. Specifically,
> the "normal" ground mounted verticals and "normal" counterpoise verticals
> appear, from some
> comments, to be offenders while the "vertical dipole" GAP antennas are less
> prone to cause interference.
>
> Can anyone substantiate this.  I am moving into a townhouse with a treed
> area (not common)
> behind it. I hope to place a vertical, of some kind, there about 100' from
> the townhouses. RFI
> after spending several hundred dollars would be a major disappointment.
>
> Thanks - Dick  N3HKN  PittsburghHave a GAP Titan up since May.
Thought I had major RFI problems.
Didn't.
Problems were with the wireing ie: phone ,TV lead in, stereo.
Just Choked the hell out of them.
No problems now.


From [e-mail] Sat Dec 21 12:38:31 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Verticals and RFI
Date: 19 Dec 1996 14:56:10 GMT
Organization: AOL http://www.aol.com
Lines: 9
Message-ID: <[e-mail]>
References: <[e-mail]>
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X-Newsreader: AOL Offline Reader

In article <[e-mail]>, [e-mail] writes:

>Problems were with the wireing ie: phone ,TV lead in, stereo.
>Just Choked the hell out of them.
>No problems now.

Is that any way to treat the people complaining? ;-)

Tom


From [e-mail] Sat Dec 21 12:38:31 1996
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From: [e-mail] (A.G. von Luternow)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Verticals and RFI
Date: Thu, 19 Dec 1996 23:05:31 GMT
Organization: -
Lines: 31
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
Reply-To: [e-mail]
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X-Newsreader: Forte Agent .99e/32.201

On Tue, 17 Dec 1996 06:24:59 -0700, [e-mail] (Thomas J. Farish)
wrote:
>
>I use a homebrew vertical and inverted-V.  Anything more than 5w on SSB
>and the vertical signal gets into my neighbor's cable TV system.  I use a
>low-pass filter on my rig and built several filters for him.  I have no
>trouble with my (broadcast) TV system.  On CW, it takes 60-100 W for him
>to notice interference when I use the vertical.  He reports no interference
>at all when I use the inverted-V!
>
>Tom
>KJ5LT
>
Hi Tom,

I would suggest that you visit your neighbor and take the appropriate
sized wrenches to tighten all of his cable connections. I do mean all,
not just at the box and TV but any splitters and outdoor connections
as well. Most consumers only finger-tighten these connections and I
have seen some cable installers do the same.

Properly tightening these connections might solve or at least reduce
the interference problems.

73 de n4jvp
Fritz

cc:[e-mail]
To reply to this message, please remove the
underscore from the beginning of the reply to
address. I'm trying to fight the spam-bots!


From [e-mail] Sat Dec 21 12:38:32 1996
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From: "ruty" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: VHF COLINEAR ANTENNA
Date: 18 Dec 1996 21:15:35 GMT
Organization: France Telecom Interactive
Lines: 5
Message-ID: <01bbed28$8e9dc680$[e-mail]>
NNTP-Posting-Host: yellow-dij-55.wanadoo.fr
X-Newsreader: Microsoft Internet News 4.70.1155

I research a plan to construct a vertical colinear VHF antenna . Who can
help me?
thanks and 73's de F1GTM, Jacques .




From [e-mail] Sat Dec 21 12:38:33 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!newspump.sol.net!howland.erols.net!worldnet.att.net!uunet!in3.uu.net!199.249.160.130!news.csranet.com!usenet
From: Hal Rosser W4PMJ <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: VHF COLINEAR ANTENNA
Date: Thu, 19 Dec 1996 14:04:30 -0800
Organization: CSRA Internet Services
Lines: 9
Message-ID: <[e-mail]>
References: <01bbed28$8e9dc680$[e-mail]>
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To: ruty <[e-mail]>

I suggest stacking 3 or 4 folded dipoles in phase.
the arrl antenna book will help with spacing, but you have to
use some of your own brainpower to figure out
how to use pvc pipe and ty-raps and tv twin-lead
to make it happen.
--
73'S de W4PMJ (FORMERLY AE4YN)
HAL
[e-mail]


From [e-mail] Sat Dec 21 12:38:34 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!ix.netcom.com!news
From: Antonio D Robinson  <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Wanted -  TV SAT Antenna
Date: Tue, 17 Dec 1996 05:06:59 GMT
Organization: Netcom
Lines: 2
Message-ID: <5959jm$[e-mail]>
NNTP-Posting-Host: ela-mi4-04.ix.netcom.com
X-NETCOM-Date: Mon Dec 16  9:03:50 PM PST 1996
X-Newsreader: NETCOMplete/3.0

Looking for 12-15' alum TV Sat Antenna, just the antenna, do not need Mwave ho
rn....
Thanks!


From [e-mail] Sat Dec 21 12:38:35 1996
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From: [e-mail] (Jonathan Visser)
Newsgroups: rec.radio.amateur.antenna
Subject: Wanted Info of 2m and 440 antenna
Date: 15 Dec 1996 22:25:47 GMT
Organization: Dordt College, Sioux Center, IA
Lines: 15
Distribution: world
Message-ID: <591ttb$[e-mail]>
NNTP-Posting-Host: cc.dordt.edu
X-Newsreader: TIN [version 1.2 PL2]


I was wondering if anyone knew of an antenna that looks like a CB 4'
fiberglass wip.  I want to get a 2m/440 radio in my pickup, that already
has a CB antenna on it, and I want to get a matching on so it looks
like I have dual CB antenna's on the back.  I would like to keep my
truck with a fairly low profile.

Thanks,

Jon

************************************************************
Jonathan Visser            E-mail [e-mail]
************************************************************



From [e-mail] Sat Dec 21 12:38:36 1996
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From: "K2II" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Wanted: Triband colinear w/ 1.2 gigs
Date: 21 Dec 1996 04:15:21 GMT
Organization: Relationships
Lines: 4
Message-ID: <01bbeef4$e20f3920$d45ca7cd@default>
NNTP-Posting-Host: tcp212.spec.net
X-Newsreader: Microsoft Internet News 4.70.1155

Wanted: Triband colinear station antenna with 1.2 gig coverage. Other
bandscan be any other two UHF or VHF bands. Must be in excellent condition.
TNX, Larry
[e-mail]


From [e-mail] Sat Dec 21 12:38:37 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!news2.digex.net!news6.digex.net!news2.dn.net!usenet
From: "K2II" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Wanted: Yaesu G-5400B alt/az rotor
Date: 21 Dec 1996 04:17:24 GMT
Organization: Relationships
Lines: 3
Message-ID: <01bbeef5$2b97fdc0$d45ca7cd@default>
NNTP-Posting-Host: tcp212.spec.net
X-Newsreader: Microsoft Internet News 4.70.1155

Wanted: Yaesu G-5400B alt/azimuth rotor in excellent condition.
E-mail [e-mail]
Tnx


From [e-mail] Sat Dec 21 12:38:38 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.net!www.nntp.primenet.com!nntp.primenet.com!news.sprintlink.net!news-peer.sprintlink.net!howland.erols.net!feed1.news.erols.com!worldnet.att.net!uunet!in3.uu.net!132.175.109.6!news.sandia.gov!tesuque.cs.sandia.gov!corvette.mst6.lanl.gov!newshost.lanl.gov!mamie.lanl.gov!user
From: [e-mail] (Thomas J. Farish)
Newsgroups: rec.radio.amateur.antenna
Subject: wanted:Inverted-V model for MacMININEC4.4
Date: Fri, 13 Dec 1996 12:37:59 -0700
Organization: LANL
Lines: 15
Message-ID: <[e-mail]>
NNTP-Posting-Host: mamie.lanl.gov

I recently downloaded the MacMININEC4.4 demo, and would like to model an
80m inverted V.  I'd very much appreciate it if someone who has already
modeled an inverted V (for any frequency) would send me their input file.

Thanks!

tjf, KJ5LT

--
Thomas J. Farish, ScD
[e-mail]

I don't speak for LANL and they don't speak for me.

PGP public key available upon request


From [e-mail] Sat Dec 21 12:38:39 1996
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From: [e-mail] (Spencer Trombly)
Newsgroups: rec.radio.amateur.antenna
Subject: white christmas
Date: 20 Dec 96 20:42:20 GMT
Organization: ucsd usenet gateway
Lines: 53
Message-ID: <Pine.SUN.3.94.961220154047.13562A-100000@polaris>
References: <[e-mail]>
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]

  From: Santa Claus <[e-mail]>
  Subject: BLAM!  Snowball Fight!

        SSSSSSS    NNN      NNN        OOOOO    WWW               WWW
        SSS   SSS  NNNN     NNN       OOOOOOO   WWW               WWW
        SSS   SSS  NNNNN    NNN     OOO     OOO  WWW             WWW
        SSS        NNNNNN   NNN     OOO     OOO   WWW            WWW
         SSS       NNN NNN  NNN     OOO     OOO    WWW    WW    WWW
           SSS     NNN  NNN NNN     OOO     OOO     WWW   WW   WWW
           SSS     NNN   NNNNNN     OOO     OOO       WWWWWWWWW
        SSS  SSS   NNN    NNNNN     OOO     OOO       WWWW  WWWW
        SSS   SSS  NNN     NNNN       OOOOOOO         WWW   WWWW
         SSSSSSS   NNN      NNN        OOOOOO         WWW    WWW


        BBBBBBB         AAAAA       LLL         LLL                !!!
        BBB  BBB       AAA AAA      LLL         LLL                !!!
        BBB   BBB      AAA AAA      LLL         LLL                !!!
        BBB   BBB     AAA   AAA     LLL         LLL                !!!
        BBB  BBB      AAA   AAA     LLL         LLL                !!!
        BBBBBB         AAAAAAAA     LL          LLL                !!!
        BBB  BBB       AAAAAAAA     LL          LLL                !!!
        BBB   BBB   AAA       AAA   LLL         LLL
        BBB  BBB    AAA       AAA   LLLLLLLLLL  LLLLLLLLLL         !!!
        BBBBBBB     AAA       AAA   LLLLLLLLLL  LLLLLLLLLL         !!!


                Consider yourself hit by a snowball. I win!



 *************************************************************************
       Send this message to as many people as possible, in the first

                      *E-MAIL SNOWBALL FIGHT!*

       Send it back or to people already listed above. send it to your
 parents, siblings, politicians, teachers, bullies or anyone else you've
 wanted to hit with a snowball.  Have fun, but don't blame me if you're
 hit.
       Remember: e-mail snowballs don't hurt, don't get you soaked and
 don't melt away.  Throw one today!
 *************************************************************************


 And have a Merry Christmas!

 Best wishes from the elves, reindeer, and of course Mrs. Claus as well.

 Santa "St. Nick" Claus





From [e-mail] Sat Dec 21 12:38:40 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!news.ultranet.com!usenet
From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: WTB 2 METER ANTENNA (MOBILE)
Date: Mon, 16 Dec 1996 04:46:20 GMT
Organization: UltraNet Communications, Inc.
Lines: 5
Message-ID: <[e-mail]>
NNTP-Posting-Host: d3.mnh.nh.ultra.net
X-Newsreader: Forte Free Agent 1.1/16.230

I am looking for a 2 meter mobile antenna for sale? email me if you
have one for sale?

thanks
ben N1QZM


From [e-mail] Sat Dec 21 12:38:40 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!news.sprintlink.net!news-peer.sprintlink.net!news.sprintlink.net!news-pull.sprintlink.net!news.sprintlink.net!news-atl-21.sprintlink.net!news.gate.net!nntp.seflin.lib.fl.us!a043971t
From: [e-mail] (Joey Solomon)
Newsgroups: rec.radio.amateur.antenna
Subject: wtb aircraft radio
Date: 20 Dec 1996 22:39:34 GMT
Organization: SEFLIN Free-Net - Broward
Lines: 12
Message-ID: <59f4j6$[e-mail]>
NNTP-Posting-Host: bcfreenet.seflin.lib.fl.us
X-Newsreader: TIN [version 1.2 PL2]

Please send how to's on 2m or 440 meter antennas please thanks

--
KF4MKU
73's to all


Joey Solomon
[e-mail]
[e-mail]

Life is a sport,  drink it up!!!


From [e-mail] Sat Dec 21 12:38:41 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.net!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!worldnet.att.net!arclight.uoregon.edu!newsfeed.dacom.co.kr!usenet.kornet.nm.kr!ames!usenet
From: Dave Earnest <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: WTB. Antenna and Match
Date: Fri, 20 Dec 1996 12:05:15 -0800
Organization: Lost in the Silicon Valley
Lines: 6
Message-ID: <[e-mail]>
NNTP-Posting-Host: noc2.arc.nasa.gov
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.01 (X11; I; SunOS 4.1.3 sun4m)
CC: [e-mail]

Looking for good, used R7 and Dunestar SM-03/V Stack Match for
verticals.

Want to phase with my existing R7.

73 Dave K7JJ


From [e-mail] Sat Dec 21 12:38:42 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!news-peer.gsl.net!news.gsl.net!portc01.blue.aol.com!audrey01.news.aol.com!not-for-mail
From: [e-mail] (Wb2chw)
Newsgroups: rec.radio.amateur.antenna
Subject: WTB: 1.2 gig antenna =:)
Date: 17 Dec 1996 12:59:18 GMT
Organization: AOL http://www.aol.com
Lines: 5
Message-ID: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

Wanted: 1.2 gig antenna for my home shack. Can be a mono band 1.2 gig or a
dual or triple band model incorporating 1.2 gig coverage. Must be in very
good to excellent condition.
E-mail:  [e-mail]
Thanks!


From [e-mail] Sat Dec 21 12:38:43 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.net!www.nntp.primenet.com!nntp.primenet.com!ix.netcom.com!news
From: "J.W." <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: WTB: Tailtwister control box
Date: Thu, 12 Dec 1996 23:33:13 +0500
Organization: Netcom
Lines: 3
Message-ID: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: buf-ny3-29.ix.netcom.com
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-NETCOM-Date: Thu Dec 12  7:54:18 PM PST 1996
X-Mailer: Mozilla 3.0Gold (Win16; I)

Looking for a CDE tailtwister control box for a Ham-M rotor I have. Will
condider the control box that is a notch down from this. tnx jeff



From [e-mail] Sat Dec 21 12:38:43 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!news.bbnplanet.com!cam-news-hub1.bbnplanet.com!uunet!in1.uu.net!199.171.50.17!holmes.sgate.com!jekyll.sgate.com!donovanf
From: Frank Donovan <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: WTB: Tailtwister control box
Date: Mon, 16 Dec 1996 17:01:17 -0500
Organization: Southgate Internet Host
Lines: 20
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: jekyll.sgate.com
Mime-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
In-Reply-To: <[e-mail]>

On Thu, 12 Dec 1996, J.W. wrote:

> Looking for a CDE tailtwister control box for a Ham-M rotor I have. Will
> condider the control box that is a notch down from this. tnx jeff

Suggest you try:
Norm's Rotor Service
5263 Agro Drive
Frederick, MD 21703

301-874-5885  M-F 0800-1630 EST

Norm stocks HyGain (aka CDE) rotors, control boxes and spare parts.

73
Frank
W3LPL
[e-mail]




From [e-mail] Sat Dec 21 12:38:44 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!newsfeed.internetmci.com!forge.sbt.net!news.ia.net!zeus.ia.net!kovar
From: [e-mail] (Jack Kovar  KE0AX)
Newsgroups: rec.radio.amateur.antenna
Subject: WTB:KW Antenna Tuner
Date: 18 Dec 1996 03:34:18 GMT
Organization: InterAccess Networking
Lines: 11
Message-ID: <597onq$[e-mail]>
NNTP-Posting-Host: zeus.ia.net
X-Newsreader: TIN [version 1.2 PL2]

        I would like to purchase a Good quality ANtenna tuner that

        will handle 1000 watts.

        Please let me know what you may have and prices.

                                Thanks,

                                        Jack Kovar
                                        K0VAR



From [e-mail] Sat Dec 21 12:38:45 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.net!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!news-peer.gsl.net!news.gsl.net!portc01.blue.aol.com!audrey01.news.aol.com!not-for-mail
From: [e-mail] (ADatGHC)
Newsgroups: rec.radio.amateur.antenna
Subject: YAGI design question.
Date: 18 Dec 1996 21:20:30 GMT
Organization: AOL http://www.aol.com
Lines: 5
Message-ID: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

I am designing a YAGI antenna to use for 420-450 ATV.  Is it necessary for
the parasitic elements to be electrically connected to the Boom.  Could
you use a nonconductive material for the boom?  Thanks for any light that
can be shed on this question.  E-Mail is OK, however I do read this news
group.


From [e-mail] Sat Dec 21 12:38:46 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!news.kei.com!newsfeed.internetmci.com!feed1.news.erols.com!cpk-news-hub1.bbnplanet.com!news.bbnplanet.com!cam-news-hub1.bbnplanet.com!howland.erols.net!blackbush.xlink.net!news-kar1.dfn.de!news-stu1.dfn.de!news.belwue.de!news.uni-stuttgart.de!moritz
From: [e-mail] ()
Newsgroups: rec.radio.amateur.antenna
Subject: Re: YAGI design question.
Date: 19 Dec 1996 14:08:07 GMT
Organization: Comp.Center (RUS), U of Stuttgart, FRG
Lines: 22
Message-ID: <59bi87$[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ipers1.e-technik.uni-stuttgart.de

>I am designing a YAGI antenna to use for 420-450 ATV.  Is it necessary for
>the parasitic elements to be electrically connected to the Boom.  Could
>you use a nonconductive material for the boom?  Thanks for any light that
>can be shed on this question.

Are you *designing* an antenna or building one following some design?
There are a large number of designs around, the best are those by
DL6WU, made known and optimized in the US by K1FO and published
in the ARRL handbooks.

If you follow a design for a yagi antenna, you must adhere exactly
to the diameter of the elements and the boom as well as the method
of mounting the elements, because all these factors affect the result.

In fact you may change the boom diametar or use insulating material,
provided you change the element length by the correct amount.

Today good yagi antennas are designed by computer modelling. This
has led to a vast improvement since the old days of "cut and try".


73, Moritz DL5UH


From [e-mail] Thu Jan 02 17:15:20 1997
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!zombie.ncsc.mil!newsgate.duke.edu!newshost.convex.com!bcm.tmc.edu!news.msfc.nasa.gov!www.nntp.primenet.com!nntp.primenet.com!feed1.news.erols.com!howland.erols.net!news.sprintlink.net!news-peer.sprintlink.net!news.sprintlink.net!news-hub.sprintlink.net!news.sprintlink.net!news-fw-22.sprintlink.net!itnews.sc.intel.com!news
From: Cecil Moore <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: FS:  G5RV New Never Used
Date: Wed, 11 Dec 1996 17:40:40 -0800
Organization: Intel Corporation
Lines: 8
Message-ID: <[e-mail]>
References: <58l91g$[e-mail]>
NNTP-Posting-Host: camoore-desk.ch.intel.com
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 2.01 (WinNT; I)

K Campbell wrote:
> Great antenna, but wont fit on my lot.
> should have bought the 80 meter version.

Well, you could make two 80m versions out of that one, put
one up and sell the other.

73, Cecil, W6RCA, OOTC


From [e-mail] Thu Jan 02 17:15:21 1997
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!usenet
From: "Len Umina" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Sommer Beams etc..
Date: 12 Dec 1996 05:06:30 GMT
Organization: UltraNet Communications, Inc.
Lines: 7
Message-ID: <01bbe7ea$4ddb45c0$[e-mail]>
NNTP-Posting-Host: d235.mbo.ma.ultra.net
X-Newsreader: Microsoft Internet News 4.70.1155

Does anyone have any experience with Sommer beams?  I'd like to hear from
you.

Thanks,
Len

N1LU


From [e-mail] Thu Jan 02 17:15:22 1997
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!usenet.eel.ufl.edu!freenet3.afn.org!afn17891
From: "Thomas W. Castle" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: ALL NIGGERS SHOULD DIE
Date: Thu, 12 Dec 1996 01:08:59 -0500
Lines: 15
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]> <[e-mail]> <[e-mail]> <[e-mail]> <[e-mail]>
NNTP-Posting-Host: freenet3.afn.org
Mime-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
NNTP-Posting-User: afn17891
To: n3tvv <[e-mail]>
cc: Lavel McCray <[e-mail]>, Mike <[e-mail]>
In-Reply-To: <[e-mail]>

On Wed, 11 Dec 1996, n3tvv wrote:
> WHAT DOES HATING  BLACK PEOPLE  HAVE TO DO WITH THIS NEWS GROUP ??
> NOTHING !!!!!!!
> EXPRESS YOUR OPINION SOMEWHERE ELSE
> BECAUSE FRANKLY WE DON`T GIVE A DAMN!!!!!!!!!!!!!!!!!!!!!!!!!!!!
> ERIC ,N3TVV([e-mail])

Well - when you learn to figure out who originated the message {not me},
you'll realize, that I just added a comment to this - ILL placed message.
If you don't like it go complain to the author, the opinion of mine does
still STAND... SO Frankly, I don't give a damn to begin with...

De Tom.




From [e-mail] Thu Jan 02 17:15:23 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!enews.sgi.com!news.sgi.com!news-out.microserve.net!news-in.microserve.net!news.supernet.net!nntp.cntfl.com!usenet
From: Joe Leikhim <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: design help needed
Date: Thu, 19 Dec 1996 00:03:47 -0500
Organization: CMDS News machine
Lines: 36
Message-ID: <[e-mail]>
References: <32AA4F02.2B56@r.r>
NNTP-Posting-Host: 199.44.114.31
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 2.01 (Win95; U)

z@. wrote:
>
> Have a bearcat bc855 w/broken antenna. using piece of wire, doesn't
> work that well. could someone please post a simple wire antenna
> that would work well with this scanner? I moniter 39-930 mhz, would
> prefer optimized for 39 mhz. am handicapped, can't do a big antenna
> outdoors, but can string wire indoors.
>  any help would be greatly appreciated.
>                                           -Rick

Try a 1/2 wave center fed dipole. Run 6 feet of wire from the antenna
connector and a counterpoise of 6 feet of wire from the radio ground.
Arrange them in as close to a verticle manner as possible. Like this:

        |
        |
        |
        | 6 ft
        |
        {  } radio
        |
        |
        | 6 ft
        |
        |
        |
--
Joe Leikhim
[e-mail]

"tv dinner by the pool,
i'm so glad i finished school" -F.Zappa 1967

"The Revolution will NOT be televised" -Gil Scott Heron




From [e-mail] Thu Jan 02 17:15:24 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!news.kei.com!news.thenet.net!news.supernet.net!nntp.cntfl.com!usenet
From: Joe Leikhim <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 20kHz Doppler on UHF??!!!
Date: Thu, 19 Dec 1996 00:10:19 -0500
Organization: CMDS News machine
Lines: 21
Message-ID: <[e-mail]>
References: <593aup$[e-mail]>
NNTP-Posting-Host: 199.44.114.31
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 2.01 (Win95; U)
To: AM Randle <[e-mail]>

AM Randle wrote:
> I would greatly appreciate any opinions and experiences on the subject
>of excessive "Doppler shifts".
>
> What I am looking into is a situation (one that I wasn't involved in)
> where 20kHz Doppler-like effects were observed on a 1500MHz c/w
>signal.

This is likely a SARSAT signal from a search and rescue satellite on or
about 1544.500 MHz. They exhibit a characteristic doppler ship due to
the high velocity of the satellite with respect to an earth bound
observer.
--
Joe Leikhim
[e-mail]

"tv dinner by the pool,
i'm so glad i finished school" -F.Zappa 1967

"The Revolution will NOT be televised" -Gil Scott Heron



From [e-mail] Thu Jan 02 17:15:25 1997
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.iarc.com!econ4.econnect.net!news.insinc.net!thor.cal.sfl.net!demon.uunet.ca!news.uunet.ca!dciteleport.com!feed1.news.erols.com!news.dra.com!news.good.net!news.good.net!news.goodnet.com!news
From: Eric Oyen <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: simple hf receiving antenna?
Date: Thu, 19 Dec 1996 01:03:15 -0700
Organization: Telesoft
Lines: 9
Message-ID: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: phx-ts11-12.goodnet.com
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.01Gold (Win95; U)

I would like to build a simple verticla antenna that would give me
decent response over the 1.5 - 30 Mhz spectrum for short wave listening.
I will be moving into an apartment in February and want something that
will work well, be small in size and not look too ugly.

I have checked the ARRL antenna handbook, but nothing in there even
comes close to what I need. any reasonable suggestions would be helpful.

Eric <n7zzt>


From [e-mail] Thu Jan 02 17:15:26 1997
From: [e-mail] (Ed Kriston)
Date: 20 Dec 96 11:04:00
Newsgroups: rec.radio.amateur.antenna
Subject: Attic Antenna Revisited..
Message-ID: <[e-mail]>
X-FTN-To: "Gary T. Craze"
Organization: Naugha's House, Barter Board USA, Baltimore, MD
Lines: 34
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!news.sprintlink.net!news-pull.sprintlink.net!news.sprintlink.net!news-dc-10.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!newsfeed.internetmci.com!andromeda.vec.net!news.min.net!news2.min.net!fablotz!ed.kriston


"TC>Given the tradeoffs between antenna height, difference in antenna
"TC>size/performance and length of cable run, which way would you go?

Hi Gary,
        The QTH here in Reisterstown, Maryland is a condo townhouse.  I
        have gone through what you are doing right now.  I am using the
        Cushcraft AR-270 with a 60 ft run of coax.  The antenna is in
        the attic (20' AG) with the G5RV (105' SR.), 6m dipole and the
        all-band scanner antenna.  Presently the coax to the AR-270 is
        RG-213, but I have the Belden 9913 to replace it with when time
        permits.

        My "shack" used to be on the top floor of the house and I was
        running about 20 ft of RG-58X to the commercial J-pole in the
        attic.  Switched to the AR-270 with the same coax and lit
        another dash on the meter in receive.  Moved the station to the
        basement and put up the RG-213 to the antenna due to the
        additional length/loss.  Picked up the 9913 from a friend and
        will cut the line loss down some more when installed.

        My opinion:  If the AR-270B will fit in the upper attic
        (straight up and down), go that way with the 9913 coax to reduce
        line losses.  Second choice: AR-270 with the 9913 in the upper
        attic.

        P.S. I was going to use the AR-270B, but the attic is only about
        6 feet tall at the highest point.  73 de N3WJA
---
 * SLMR 2.0 * Coffee not found: (A)bort (R)etry (P)anic
--
|Fidonet: Ed Kriston 1:261/1352
|Internet: [e-mail]
|Standard disclaimer: Take a Naugha to Lunch today YOU pay the bill!


From [e-mail] Thu Jan 02 17:15:27 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!vixen.cso.uiuc.edu!howland.erols.net!EU.net!Eunet.yu!news
From: Rakita Stojan <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Magnetic loop antenna
Date: Sat, 21 Dec 1996 09:16:19 +0100
Organization: TRIOPLAST d.o.o
Lines: 7
Message-ID: <[e-mail]>
NNTP-Posting-Host: bg-01-p180.eunet.yu
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 2.01 (Win95; I)

I built up a magnetic loop antenna from one of the U,K ham radio
magazines. The antenna worked  appx. like a dipol antenna.
Does anyone has expirience with simmilar antennas? Some diagrams will be
good for me.

                           73, Stojan "SOX" 4N7AB
                         E-mail: [e-mail]


From [e-mail] Thu Jan 02 17:15:27 1997
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From: Stig Schyffert <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Automated Satellite tracking with PC ?
Date: Sat, 21 Dec 1996 11:03:23 +0100
Organization: Celsiustech Electronics
Lines: 12
Message-ID: <[e-mail]>
References: <[e-mail]>
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red dog wrote:
>
> Does anyone out there know if there is a package that can be used to
> track satellites with a PC and automaticly aim your antenna at the
> selected target?  If anyone can help I would appriciate information.
>
> Thanks
> Michael
> [e-mail]

Look in AMSAT, there is a lot of programmes.
SM0BKZ


From [e-mail] Thu Jan 02 17:15:29 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Trap Dipole
Date: Sat, 21 Dec 1996 14:07:54 GMT
Organization: Pathway Communications
Lines: 27
Message-ID: <59hh0q$[e-mail]>
NNTP-Posting-Host: ts1l13.pathcom.com
X-Newsreader: Internet Adventurer v0.26 - Registered to Merv Curley

Hi all

      I recently put up my first trap dipole [from Unadilla] for 80 and
40. It has a 1:1 balun installed.  The lowest SWR on 40 is 1.5 at 7.150,
and on 80 is 1.0 at 3.600.

 My noise bridge gives me a good reading on 40 but indicates that I
should change the co-ax to 75 ohms instead of the 50 that I used.

However the dip in noise level on 80 is very broad and while it seems to
be about where I expected, almost no setting of the Res. or Cap controls
will tell me where the real minimum is.

The coax line was checked with the noise bridge before installation and
when shorted had nulls at 3.9, 7.55 and 11.3 mhz.  When open, the nulls
appeared at 5.7, 9.45 and 13.2 Mhz.  The difference between null points
is in the vicinity of 3.75 Mhz.  I was unsure whether shortening the
line needed to be done or not, since one school of thought seems to be
to have the line multiples of .25 wavelength. I have also read just the
opposite.

What I'm wondering, after all the above verbiage, if my 80 meter test
results are typical for trap dipoles?  As a long time user of open wire
line and tuners for multiband use, I'm into a new learning stage now.





From [e-mail] Thu Jan 02 17:15:32 1997
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From: Jeffrey.A.Groves @ mci.com (Jeffrey Groves)
Newsgroups: rec.radio.amateur.antenna,alt.radio.scanner,rec.radio.scanner
Subject: Re: scanner antenna
Date: Sat, 21 Dec 1996 14:15:19 GMT
Organization: InternetMCI
Lines: 25
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]> <596tfm$[e-mail]>
Reply-To: Jeffrey.A.Groves @ mci.com
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On Tue, 17 Dec 96 18:56:04 GMT, [e-mail] (Tim Smith) wrote:

>In article <[e-mail]>, P Tyers <[e-mail]> wrote:
>
>You could even make the cone out of stiff paper or cardboard
>wrapped/glued/taped with a layer of aluminum foil.  The disc can be cut out o
f
>one of those throw away aluminum cookie sheets.  Attach your feed line (RG58
>or 59) with alligator clips to the center of the disc and and close to the
>point of the cone as possible...leave about 1/2" spacing between the disc and

>the cone.  If you like just use a plastic cup over the cone as a spacer for
>the disc to set on.  Now very carefully walk this "object d' art" up the atti
c
>steps and set it on the attic floor.  It may be ugly but it works great.  Wit
h
>my MFJ swr analyzer it is less than 2:1 SWR on most of the bands of interest.

>
>Formulas and dimensions are in the ARRL handbook.  I wouldn't do much
>transmitting on it though...unless I toss some cookie dough on the disc :-)
>>

This sounds very intriguing!  Do you have a picture in some kind af
computer format that I could take a look at?  If so, could you attach
it to a mail message?

Thanks,

Jeff G.


From [e-mail] Thu Jan 02 17:15:33 1997
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From: Edward Oros <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Who's going to be the 10,000 th hit?
Date: Sat, 21 Dec 1996 10:47:50 -0500
Organization: AT&T WorldNet Services
Lines: 21
Message-ID: <[e-mail]>
Reply-To: [e-mail]
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The Elmer HAMlet is nearing it's 10,000 th
hit. Will it be you?

There are lots of articles on dipoles,
ground planes, beams, etc. You can even
design your own antennas on-line.

One new feature even allows you to calculate
the length of coax cable you will need to
attach to your antenna :)

Come on over and visit...


 http://www.qth.com/antenna



73

Ed-AC3L


From [e-mail] Thu Jan 02 17:15:34 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.idt.net!mr.net!news.mr.net!cronkite.polaristel.net!news
From: Lyle Koehler <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: ** Transmitting Loop on Mobile: Why not? **
Date: Sat, 21 Dec 1996 10:09:38 -0600
Organization: MEANS
Lines: 8
Message-ID: <[e-mail]>
References: <[e-mail]> <59fnd8$[e-mail]>
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In the "Technical Correspondence" section on page 72 of the March 1995
QST, K6HPX describes a toroid coupling system that he used for an 11 by
4.5 foot loop operating on 160, 75 and 40 meters. He claims that the
antenna worked well for mobile NVIS contacts. He didn't say whether it
took the paint off his car.

73 from Lyle, K0LR



From [e-mail] Thu Jan 02 17:15:35 1997
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From: macino <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Test Post
Date: Sat, 21 Dec 1996 11:12:00 -0500
Lines: 4
Message-ID: <[e-mail]>
Reply-To: [e-mail]
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X-Mailer: Mozilla 2.02E (OS/2; I)

Just trying out the Voice Enabled Netscape 2.02 - OS/2 V4
setup. - pretty cool.

                       73  Jim W9LZ


From [e-mail] Thu Jan 02 17:15:36 1997
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From: [e-mail] (Robert Nickels)
Newsgroups: rec.radio.amateur.antenna
Subject: Mystery antenna
Date: Sat, 21 Dec 96 17:04:04 GMT
Organization: MidWest Communications, Inc.
Lines: 12
Message-ID: <59h5rd$jed$[e-mail]>
NNTP-Posting-Host: free-dial-39.freeport.mwci.net
X-Newsreader: News Xpress 2.0 Beta #2

Hi All,

I picked up an antenna that is a mystery to me.  It is a round plastic
"hockey puck" about 2.5" in diameter with 15' of coax and an RCA
plug on the end.  The only marking says "Radarsonics".

Anyone have a clue what this is for?

Thanks and 73,

Bob W9RAN
[e-mail]


From [e-mail] Thu Jan 02 17:15:36 1997
Newsgroups: rec.radio.amateur.antenna
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!news-out.communique.net!mr.net!www.nntp.primenet.com!nntp.primenet.com!ix.netcom.com!netcom.com!charles1
From: [e-mail] (charles copeland)
Subject: Re: TICKLE ME ELMO
Message-ID: <[e-mail]>
Organization: NETCOM On-line Communication Services (408 261-4700 guest)
References: <01bbeee3$693e5460$[e-mail]>
Date: Sat, 21 Dec 1996 17:06:25 GMT
Lines: 6
Sender: [e-mail]

In article <01bbeee3$693e5460$[e-mail]>,
Debonair <[e-mail]> wrote:
>CALL PAT AND MAKE ME AN OFFER ON A BRAND NEW TICKLE ME ELMO 609-783-7777

On what bands will an "Elmo" load up on?



From [e-mail] Thu Jan 02 17:15:37 1997
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From: [e-mail] (Rick)
Newsgroups: rec.ham-radio,rec.radio.amateur,rec.radio.amateur.antenna,rec.radio.amateur.equipment,rec.radio.amateur.misc
Subject: Re: Setting up an antenna tower.
Date: Sat, 21 Dec 1996 17:17:41 GMT
Organization: TAC, The Atlanta Connection and Radio.Org
Lines: 15
Message-ID: <[e-mail]>
References: <01bbeb67$8fcce7b0$0fb919ce@davidh>
Reply-To: [e-mail]
NNTP-Posting-Host: rick.webex.com
X-Newsreader: Forte Free Agent 1.1/32.230
Xref: news1.epix.net rec.radio.amateur.antenna:33035 rec.radio.amateur.equipment:44802 rec.radio.amateur.misc:121326

"David P. Hummel, Jr." <[e-mail]> wrote:

>I have recently come to own a previously used antenna tower.  After months
>of hard work, I managed to finally get it out of the ground.  That was the
>hard part.  But here is the fun part.  Anybody have any ideas how I can dig
>a hole in the ground that is about 2.5ft in diameter and about 6.5ft deep?
>I tried a post hole digger, but the bits are only about 4 ft deep?   Any
>suggestions?
>
>Thank you in advance.
>David P. Hummel, Jr.
>KG2BX
>
Dave,myself I used a back-hoe.Really the only you could do it the easy
way....gud luck......73 de AA4UF  Rick        [e-mail]


From [e-mail] Thu Jan 02 17:15:41 1997
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From: "Brian K. Short" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Plans 2m 3el Beam?
Date: 21 Dec 1996 11:25:02 -0700
Organization: Primenet Services for the Internet
Lines: 35
Message-ID: <[e-mail]>
Reply-To: [e-mail]
X-Posted-By: @198.68.46.90 (ke7gh)
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I am trying to build a 3 el beam for 2m that can be used
with a photographic tripod.  So far, I have constructed a
frame from PVC tubing, dimensions below.

My plan is to cut the reflector and director from RG-59 cable
and place them in the tubing (this has been done).

The last step is the driven element where I have encountered
difficulty in matching (have not spent too much time yet).

I am looking for a cookbook type solution for matching the
driven element in either a dipole or folded dipole configuration,
keeping in mind that I would like to run up to 160 watts with
my IC-706 and B1016 amplifier.

Since the photographic tripod allows rotating from horizontal
to vertical polarization easily, I would like to have sufficient
bandwidth for 144.2 as well as FM for portable use to complement
my mobile 5/8 and KB6KQ horizontal maxi-loop.

Dimensions:
Reflector - 40"   Driven - 38.2"   Director - 37.8"
R-DE-D spacings both 18"

Any comments or other pointers on this project are welcome.

I would like to construct the driven element and matching
device from 450 ohm ladder line/300 ohm ladder line/RG-59/
RG-93 etc...common materials on hand, but some guidance is
quite welcome.

(Also, I have been testing with an MFJ antenna analyzer which
 can be used to complete assembly/tuning of the driven element)

[e-mail]


From [e-mail] Thu Jan 02 17:15:42 1997
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From: "Richard A. Seifert" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Diamond SG7900 mounting suggestions?
Date: 21 Dec 1996 18:53:05 GMT
Organization: Netcom
Lines: 63
Message-ID: <01bbef70$23b59920$77c3b8cd@#seifertr>
References: <[e-mail]>
NNTP-Posting-Host: wbg-va3-23.ix.netcom.com
X-NETCOM-Date: Sat Dec 21 10:53:05 AM PST 1996
X-Newsreader: Microsoft Internet News 4.70.1155

Eric,

I have both a Toyota P/U 4x4 and a 4-Runner 4x4 and switched the antenna
between the two trucks frequently, so I used a Diamond NR-770H dual-band
antenna on a Diamond SPM35 magnetic mount. The "fold-down" antenna is
follows:
        2m:  1/2 wave, 3.0db gain
        70cm:  5/8 wave, 5.5db gain
I used the magnetic mount on the roof and ran the coax out the rear sliding
glass window.

Anyway, if you don't need the magnetic mount, I'd recommend a "proper"
installation with a drilled mount through the roof.  I wish I had done that
myself--but the wife would have bitched about drilling a hole in the roof
of the 4-Runner.  I've got to ease her into this slowly, you know...

However, the magnetic mount offers another significant advantage; a
magnetic mount will "break away" before it tears a hole in your roof.  My
magnet broke-away on two occasions that I forgot the antenna was on the
roof, and I pulled into a _very_ low clearance parking garage.  Had I not
been using a magnetic base, the aftermath of my screw-up could have
been...well...less than desirable, to say the least.  Those were the only
two times the magnet broke away, and let's say that we "speed-tested" the
magnet at over 80mph (out west on a safe, desolate highway, of course).

I'm sure you'll be rather pleased with either selection.  I know my Diamond
gave my HT a whole lot of punch (though intermod went ballistic--result of
my HT's wide-open front-end and not caused by the antenna).  It's a well
made antenna!

TIP:  If you use a magnetic mount and run the antenna out the back window,
stick a strip of adhesive-backed foam weather stripping to one side of the
sliding window as doing so will allow you to close your window without a
draft and a whistle (caused by opened window).  Good luck.

73
Rich, KB2ZMF
<[e-mail]>


Eric S. Hvozda <[e-mail]> wrote in article
<[e-mail]>...
>
> I'm looking to put a 2m/70cm mobile in my Toyota 4x4 truck.
>
> I have a problem tho.  I'd really like to put the Diamond SG7900 on,
> (it's a 7/8 wave [ie ~62 inches tall]).  However, I am concerned
> about the height factor (ie will I clear most under passes?
> the roof is 6th now); so I have doubts about a roof mount.
>
> Far as a bed mount, I have no stake holes in my bed plus I have a
> tonneau cover.
>
> What about a rear bumper mount?  On one of the sides?  Will it be
> strong enough to support the weight?  What about wind?  Will I need
> guy lines to keep this rig erect at 65MPH?
>
> Sorry for all the questions, but this group seems like a decent
> place to start.  73s!
> --
> Ack!
> Creek, not creek; Pop not soda; Car needs washed; Gumband...
>


From [e-mail] Thu Jan 02 17:15:44 1997
Path: news1.epix.net!news3.epix.net!uunet!in2.uu.net!199.45.32.37!world1.bellatlantic.net!news
From: Rush Johnson <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Mystery antenna
Date: Sat, 21 Dec 1996 14:39:18 -0500
Organization: Bell Atlantic Internet Solutions
Lines: 18
Message-ID: <[e-mail]>
References: <59h5rd$jed$[e-mail]>
NNTP-Posting-Host: client250-241-33.bellatlantic.net
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 2.02E (Win95; U)

Robert Nickels wrote:
>
> Hi All,
>
> I picked up an antenna that is a mystery to me.  It is a round plastic
> "hockey puck" about 2.5" in diameter with 15' of coax and an RCA
> plug on the end.  The only marking says "Radarsonics".
>
> Anyone have a clue what this is for?
>
> Thanks and 73,
>
> Bob W9RAN
> [e-mail]

Maybe a GPS antenna?

-Rush (NR4M)


From [e-mail] Thu Jan 02 17:15:45 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!newsxfer2.itd.umich.edu!cliffs.rs.itd.umich.edu!portc01.blue.aol.com!audrey01.news.aol.com!not-for-mail
From: [e-mail] (Wa2eaw)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: ALL xxxxxxx SHOULD DIE
Date: 21 Dec 1996 19:50:13 GMT
Organization: AOL http://www.aol.com
Lines: 4
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

If I needed a brain transplant I would want the brain of the original
author of the cited post. Why would I want that brain ..because its
NEW..Never been used,!!!!
Bob


From [e-mail] Thu Jan 02 17:15:47 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!cliffs.rs.itd.umich.edu!portc01.blue.aol.com!audrey01.news.aol.com!not-for-mail
From: [e-mail] (Fractenna)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Vertical antenna properties
Date: 21 Dec 1996 19:59:16 GMT
Organization: AOL http://www.aol.com
Lines: 6
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

Dave--

What kind of ground/counterpoise? Makes a big difference. Can model one
size for you anyway.

Chip N1IR


From [e-mail] Thu Jan 02 17:15:48 1997
Path: news1.epix.net!news3.epix.net!uunet!in3.uu.net!204.191.160.4!van-bc!news.rmii.com!rainbow.rmi.net!rainbow!jonz
From: [e-mail] (Bea and Marvin Jones)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Mystery antenna
Date: 21 Dec 1996 20:43:00 GMT
Organization: Rocky Mountain Internet - (800) 900-RMII
Lines: 17
Message-ID: <59hi4k$[e-mail]>
References: <59h5rd$jed$[e-mail]> <[e-mail]>
NNTP-Posting-Host: rainbow.rmii.com
X-Newsreader: TIN [version 1.2 PL2]

: Robert Nickels wrote:
: >
: > I picked up an antenna that is a mystery to me.  It is a round plastic
: > "hockey puck" about 2.5" in diameter with 15' of coax and an RCA
: > plug on the end.  The only marking says "Radarsonics".
: >
Are you sure it's for rf?
Maybe it's an ultrasonic transducer.

73
Jonesy W3DHJ
__
SK

--
Marvin Jones  [e-mail]
Gunnison, Colorado


From [e-mail] Thu Jan 02 17:15:49 1997
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From: "PE1PDQ" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: ?? GAP TITAN DX-VIII ??
Date: 21 Dec 1996 21:22:21 GMT
Organization: CAI Westland/Kabelfoon
Lines: 5
Message-ID: <01bbef85$05c7f560$5b0bb2c2@jan>
NNTP-Posting-Host: 194.178.11.91
X-Newsreader: Microsoft Internet News 4.70.1155

Does anyone information on the HF multibandvertical TITAN DX-VIII GAP ?

Tnx , Jan PE1PDQ
--
[e-mail]


From [e-mail] Thu Jan 02 17:15:50 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: ** Transmitting Loop on Mobile: Why not? **
Date: 21 Dec 1996 22:03:06 GMT
Organization: AOL http://www.aol.com
Lines: 5
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]
X-Newsreader: AOL Offline Reader

Yes, not only are there fields in the current whip configuration, they
also mess up the cars environmental control system and the CD player
(makes it spit out the CD!)

John...


From [e-mail] Thu Jan 02 17:15:51 1997
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From: [e-mail] (Fractenna)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: TICKLE ME ELMO
Date: 21 Dec 1996 22:21:12 GMT
Organization: AOL http://www.aol.com
Lines: 1
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

Unfortunately its AF at about 30 Hz....


From [e-mail] Thu Jan 02 17:15:51 1997
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From: Steve Foster  <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: WTB parts for Mosley pro 67 b
Date: Sat, 21 Dec 1996 23:13:10 GMT
Organization: Netcom
Lines: 1
Message-ID: <59kbon$[e-mail]>
NNTP-Posting-Host: den-co44-19.ix.netcom.com
X-NETCOM-Date: Sun Dec 22  2:12:39 PM PST 1996
X-Newsreader: NETCOMplete/3.2

Hello, I need both the red and brown radiator center sections. I have a 67b th
at started life as a 67a. I was not aware of this when I bought the 67c upgrad
e kit. The upgrade kit will not work with 67b's that were upgraded from an A.
So now I have a 67 c upgrade kit that I can't install unless I spend another $
180 with mosley. Sure would have been nice to know before.... Thanks in advanc
e and be forewarned.   Steve


From [e-mail] Thu Jan 02 17:15:52 1997
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From: "Job Oberio" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: need help on 120 dBuV/m
Date: 22 Dec 1996 00:00:00 GMT
Organization: USC
Lines: 13
Message-ID: <01bbef99$2ad8b2e0$[e-mail]>
NNTP-Posting-Host: 165.220.28.1
X-Newsreader: Microsoft Internet News 4.70.1155

Hello..

I saw a phone that transmits a power of 120dBuV/m.
I was wondering if anybody knows how to convert this
to watts or how far will this go(range)


If possible Please to this address:
   [e-mail]


Thank you very much
Job O.


From [e-mail] Thu Jan 02 17:15:53 1997
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From: "Victor D. Mete" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.dx,rec.radio.amateur.equipment,rec.radio.amateur.misc,rec.radio.swap
Subject: WTB:  Tri-Band Antenna (2M,220,440) & Tri-Plexer (2M,220,440)  for Base Station
Date: 22 Dec 1996 00:13:43 GMT
Organization: PMT
Lines: 6
Message-ID: <01bbef9c$a82738e0$LocalHost@AT&TWorldnet.worldnet.att.net>
NNTP-Posting-Host: 207.146.84.136
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 Need a Base station tri-band antenna for 2M,220,440.
 Also need tri-plexer for the same bands.
 Please contact:
----
Victor
[e-mail]


From [e-mail] Thu Jan 02 17:15:54 1997
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From: [e-mail] (Peter Somlo)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: ** Transmitting Loop on Mobile: Why not? **
Date: Sun, 22 Dec 1996 00:19:17 GMT
Organization: zeta.org.au
Lines: 20
Message-ID: <59hrcl$[e-mail]>
References: <[e-mail]> <[e-mail]>
NNTP-Posting-Host: dialup06.syd1.zeta.org.au
X-Newsreader: Forte Free Agent v0.55

[e-mail] wrote:




>Of course ALL antennas are sensitive to BOTH magnetic and electric fields.
>If they weren't, the couldn't be used as antennas!
>

How about electrically shielded loop antennas? They can be made to
respond to the magnetic fields only (that is almost).

Peter
--
Dr Peter I Somlo FIEEE | M1: "Every coin has 3 sides - at least"
Microwave Consultant   | M2: "The wind ain't gonna blow from where it
tel/fax:[phone] |      ought'a, it'l blow from where it can"
Mobile: [phone]   |        http://www.zeta.org.au/~somlo




From [e-mail] Thu Jan 02 17:15:57 1997
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From: [e-mail] (W6KKT Jesse)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Veritcal vs. G5RV ???
Date: Sun, 22 Dec 1996 01:00:26 GMT
Organization: Microserve Information Systems (800)-380-INET
Lines: 28
Distribution: world
Message-ID: <[e-mail]>
References: <[e-mail]>
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On Sat, 21 Dec 1996 03:45:42 GMT, [e-mail] (Hugh Duff) wrote:

>I'd like to hear from some experienced HFers...
>I will soon errect a modest antenna for HF.  Just wondering what would
>perform better  (I own both but only wish to put up one of them)...
>
>A  G5RV strung out in an inverted-V configuration that is raised to
>about 50' at the feedpoint with each leg running out to the corners of
>the backyard   OR   a vertical antenna at ground level in the center
>of the backyard with radials buried under the soil ?
>
>I'm aware that the vertical offers a lower angle of radiation which is
>ideal for DXing however  I'm leaning towards the G5RV since I'm
>reluctant to the thought of greatly reducing  the usuable space in the
>backyard once the vertical is installed.
>I'm not much of a DX chaser anyway...my HF operation is more casual.
>I just wonder after all considered if the G5RV would be a  compromise
>compared to the vertical.
>
>Thanks de Hugh, VA3TO

Hi Hugh, a G5RV was never designed for a inverted "V" config.  On the
higher bands it's performance and matching problems leave a lot to be
desired.
Have you considered multiple inverted Vees (one for each band you want
to work)  seperated 4 inches, connected to a common coax (thru a
balun)?  It performs much better than the G5RV inverted V.
Good Luck, Jesse, W6KKT


From [e-mail] Thu Jan 02 17:15:58 1997
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From: [e-mail] (W6KKT Jesse)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Vertical antenna properties
Date: Sun, 22 Dec 1996 01:18:17 GMT
Organization: Microserve Information Systems (800)-380-INET
Lines: 18
Distribution: world
Message-ID: <[e-mail]>
References: <[e-mail]>
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On Sat, 21 Dec 1996 09:54:32 -0500, David Cooley <[e-mail]>
wrote:

>Could someone post, or point me in the right direction to, properties of
>vertical antennas by 1/8 wavelength increments, IE: feed impedance,
>radiation patterns, Dbd gain etc.
>Thanks,
>Dave
>--
>=================================================================
>David Cooley           A.K.A. N5XMT            [e-mail]
>http://www.ipass.net/~cooldave/
>=================================================================

David, do yourself a favor and purchase ELNEC or EZNEC  antenna design
software from W7EL.  In my opinion, one cannot make a better
investment in Amateur radio.
73, Jesse, W6KKT


From [e-mail] Thu Jan 02 17:15:59 1997
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From: [e-mail] (Jan PA0LBN)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: ** Transmitting Loop on Mobile: Why not? **
Date: Sun, 22 Dec 1996 01:28:32
Organization: none
Lines: 20
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]> <59hrcl$[e-mail]>
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X-Newsreader: Trumpet for Windows [Version 1.0 Rev A]

In article <59hrcl$[e-mail]> [e-mail] (Peter
Somlo) writes:
>[e-mail] wrote:
>>Of course ALL antennas are sensitive to BOTH magnetic and electric fields.
>>If they weren't, the couldn't be used as antennas!
>>
>How about electrically shielded loop antennas? They can be made to
>respond to the magnetic fields only (that is almost).
>Peter

The shielding of a loop shall aways be broken at one spot, otherwise the
loop will not work. The funny thing about shielding a single turn loop is
that the voltage over the gap in the shielding will be equal to the voltage
over the tuning condensor of the inner loop!
That's because inner and outer loop are closly coupled.
So where is your advantage using shielding?
(apart from all difficulties you get.)
Shielding a loop is only usefull in multiturn loops for receiving.
regards,
Jan PA0LBN


From [e-mail] Thu Jan 02 17:16:00 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Coax
Date: Sun, 22 Dec 1996 01:33:18 GMT
Organization:
Lines: 10
Message-ID: <[e-mail]>
NNTP-Posting-Host: dialup037.qnsbny1.capital.net
X-Newsreader: Forte Free Agent 1.1/32.230

I recently aquired a nice Kenwood TS-780 All-Mode rig. I intend to
upgrade my present antenna and feedline. My question is this: Is
Belden 9913 worth using for a 70' run from transmitter to antenna? I
don't know much about it other than it's a low loss line. Any comments
or suggestions will be welcome. You can send me E-Mail or post here
for others to read.
TNX.
--
73,
Butch N2YMJ


From [e-mail] Thu Jan 02 17:16:01 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: FS: CB Service Manuals (Tram)
Date: Sun, 22 Dec 1996 01:41:24 GMT
Organization:
Lines: 21
Message-ID: <[e-mail]>
References: <58vr9m$[e-mail]> <[e-mail]> <[e-mail]>
NNTP-Posting-Host: dialup037.qnsbny1.capital.net
X-Newsreader: Forte Free Agent 1.1/32.230

Joe <[e-mail]> wrote:

>[e-mail] wrote:
>> What the hell do CB manuals have to do with antennas?
>
>Maybe he hit the wrong newsgroup???
>
>p.s.  nice language
>Joe
>----------------------------------------------------------
>Amateur Radio:  BV/N0IAT   Taipei TAIWAN Republic of China
>    http://www.transend.com.tw/~joentam/index1.html
>ex.  7J1AOF (Japan)  YU3/N0IAT (Slovenia)  KA0ZDH (Novice)
>Licensed Radio Amateur since 1986.  Comments are mine only.
>----------------------------------------------------------
Perhaps the origina poster just thought anyone reading a radio
oriented newsgroup would have some interest in the items. A kinder,
gentler answer wouldn't have hurt.
--
73,
Butch N2YMJ


From [e-mail] Thu Jan 02 17:16:02 1997
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From: Dan Dillon <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Help me decide on an HF mobile antenna for cross country trip.
Date: Sat, 21 Dec 1996 18:11:51 -0800
Organization: Cal State Long Beach
Lines: 41
Message-ID: <[e-mail]>
NNTP-Posting-Host: p15-as1.lonbea1.csu.sloc.net
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Content-Type: text/plain; charset=us-ascii
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Hello all,

In January, I will be taking a cross country drive in a moving van
across the country... From Los Angeles to New Hampshire.  I have
decided to take my (rarely used lately) 100 watt all band HF rig for
the trip.  My problem is that I know very little about HF mobile
antennas and would like to get something at a reasonable price before
January.  It needs to be something I can put in or on a rented moving
truck/van.  (I can't drill any holes.)  Mag mount or mirror mount
would work.

I would really like something that I can change bands without needing
to stop the truck and get out to change elements, or move a plug,
or any other modifications.  I have an automatic antenna tuner in
my HF rig.   Lastly, I hope to keep the price down as much as possible.
I don't need the highest quality, but just something that will work
reasonably well.  I will put the money into the project if it is
really a better antenna, but would like to avoid spending too much

So, all of you HF mobile'rs out there.... PLEASE ... suggest an
antenna that I can get by January.  I don't know what to get.  I live
here in the Los Angeles area, so fortunately there are a few ham stores
around here.

Thanks in advance... all suggestions... no matter how small are
very much appreciated.


Dan

KD6FPX.   Listen for my CQ's from Jan 2nd to approx Jan 9th.


--
                                                   ( . )
                                                     |
__Dan Dillon________________________________________/|\___KD6FPX______
Mailto://[e-mail]    http://www.engr.csulb.edu/~ddillon/
PGP Public Key: http://www.engr.csulb.edu/~ddillon/ddillon_pub_key.asc
PGP Fingerprint   =>   02 A6 07 34 22 80 53 09 8C 1E 5E 15 1A B4 43 1F
Please:      No unsolicited E-mail avertising or religious propaganda.


From [e-mail] Thu Jan 02 17:16:03 1997
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From: [e-mail]
Newsgroups: rec.ham-radio,rec.radio.amateur,rec.radio.amateur.antenna,rec.radio.amateur.equipment,rec.radio.amateur.misc
Subject: Re: Gary Coughman SUPPORTS HAZING !!!
Date: Sun, 22 Dec 1996 03:49:53 GMT
Organization:
Lines: 20
Message-ID: <[e-mail]>
References: <01bbeb67$8fcce7b0$0fb919ce@davidh> <[e-mail]> <[e-mail]> <59fhd5$[e-mail]>
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[e-mail] (Jim Kehler) wrote:

<snip>
>I think not.  I think people should be able to just pick up the phone, call o
ne
>of those guys with the big trucks with the giant drill bits, and let THEM com
e
>over and dig the hole for the tower.   Post hole diggers are keeping a lot of
>quality, qualified people out of ham radio, and it's time this hazing ritual
>come to an END !!!  I am going to write to the ARRL and WARC 99 and tell them
 I
>think it's about time to get rid of post hole diggers for ever !!!
>
>73, Jim KH2D

I enjoy Gary's posts. He writes in an intelligent and courtious
manner. His explanations have helped me tremendously. You ought to
take this crap back to that other "newsgroup". You know the one where
the no-codes and the know-codes spend all their time sticking verbal
knives into eachother.
--
73,
Butch N2YMJ


From [e-mail] Thu Jan 02 17:16:04 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: wwwwwwwwwwwêêêêêêêç|╠╠êêêêêêêçp
Date: Sun, 22 Dec 1996 04:00:26 GMT
Organization: ENTER.NET
Lines: 11
Message-ID: <32bcb238.5494916@news>
NNTP-Posting-Host: m40atwn-1-35.enter.net
X-Newsreader: Forte Free Agent 1.1/16.230

On Sun, 15 Dec 1996 23:22:20 -0500, KD1YV <[e-mail]>
wrote:

>In hoping to comply with the FCC requirements, I am doing some analysis on my
>station conditions.  I am using the program NF.EXE which Brian Beezley was
>kind enough to release to the public.

esults remained intolerable.


where do i get this? tnx much...


From [e-mail] Thu Jan 02 17:16:07 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Help me decide on an HF mobile antenna for cross country trip.
Date: Sun, 22 Dec 1996 04:07:32 GMT
Organization: ENTER.NET
Lines: 34
Message-ID: <32bcb2ad.5611632@news>
References: <[e-mail]>
NNTP-Posting-Host: m40atwn-1-35.enter.net
X-Newsreader: Forte Free Agent 1.1/16.230

On Sat, 21 Dec 1996 18:11:51 -0800, Dan Dillon
<[e-mail]> wrote:


>So, all of you HF mobile'rs out there.... PLEASE ... suggest an
>antenna that I can get by January.  I don't know what to get.  I live
>here in the Los Angeles area, so fortunately there are a few ham stores
>around here.
>

there are some mag mounts for  hf antennas, though i dont know how
well they work

most hf mobilers who are serious go for the texas bug catchers or the
screwdriver antennas. texas bc's are the best performers, according to
several articles over the years, but you gotta get outta the car to
change bands.

the screw driver antennas (i have one) work very well. they are
slightly below the bc in performance, but you can match them as you
drive....dont take your eyes off the road though!

there are at least 2 mfrs of these: high sierra and tj antenna. i bot
the tj antenna and it works reasonably well, but theyve had severe QC
problems and have required a tremendous amount of time and effort to
fix...they supplied the parts, i supplied the elbow grease. if i were
to do it again id probably go for the high sierra instead of tj

the hustlers and hamstick antennas are used by casual folks who value
ease of installation over performance. tests ive seen indicate they
are about 10 db down from bug catchers and screwdrivers.

good luck and ill look for you on the air. alot of hf mobilers hang
out on 14302.5.


From [e-mail] Thu Jan 02 17:16:09 1997
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From: Ed & Brenda Cregger <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.misc
Subject: Re: MFJ259 antenna analyzer
Date: Sun, 22 Dec 1996 00:28:38 -0500
Organization: accsyst.com
Lines: 13
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: access4.accsyst.com
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I've owned my MFJ-259 about two months and love it, but...

Both battery holders have broken on the ends where the 9 volt battery
type connector attaches. I have yet to take advantage of MFJ's one year,
no matter what warranty on this item, so I am not saying anything bad
about MFJ. It's just that you should inspect yours for cracks and have
them replaced before they leave you high and dry AFTER you're up on the
roof or the tower.

Otherwise I love it. It's a great unit.

Ed Cregger, NM2K
[e-mail]


From [e-mail] Thu Jan 02 17:16:10 1997
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From: [e-mail] (Kingfish)
Newsgroups: rec.radio.amateur.antenna
Subject: Blocking ham/cb interference on stereo equipment?
Date: Sun, 22 Dec 1996 05:45:13 GMT
Organization: Voicenet - Internet Access - [phone]
Lines: 14
Message-ID: <59jrda$[e-mail]>
NNTP-Posting-Host: philly152.voicenet.com
X-Newsreader: Forte Free Agent 1.0.82

Hi Everyone,

A neighbor of mine has a ham or cb radio, and his transmissions come
out over my stereo, telephone, clock radio - anything with a speaker.
The FCC won't do anything about it.

I know there are filters you can put on your telephone to block some
of the interference.  Is there anything like that for stereo
equipment?

Thanks,

JOn



From [e-mail] Thu Jan 02 17:16:10 1997
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From: George Baker <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Vertical antenna properties
Date: Sat, 21 Dec 1996 23:51:12 -0600
Organization: Southwestern Bell Internet Services
Lines: 21
Message-ID: <[e-mail]>
References: <[e-mail]>
Reply-To: [e-mail]
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David Cooley wrote:
>
> Could someone post, or point me in the right direction to, properties of
> vertical antennas by 1/8 wavelength increments, IE: feed impedance,
> radiation patterns, Dbd gain etc.
> Thanks,
> Dave
> --
> =================================================================
> David Cooley           A.K.A. N5XMT            [e-mail]
> http://www.ipass.net/~cooldave/
> =================================================================

David, get a copy of EZNEC from Roy Lewallen, W7EL and model the various
lengths. It would be very easy to do and you would get a very detailed
picture of the behavior of the antennas at various lengths.

--
73, George
W5YR (original, not vanity)
Fairview, TX


From [e-mail] Thu Jan 02 17:16:11 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: ** Transmitting Loop on Mobile: Why not? **
Date: 22 Dec 1996 08:15:11 GMT
Organization: AOL http://www.aol.com
Lines: 32
Message-ID: <[e-mail]>
References: <59hrcl$[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]
X-Newsreader: AOL Offline Reader

In article <59hrcl$[e-mail]>, [e-mail] (Peter
Somlo) writes:

>How about electrically shielded loop antennas? They can be made to
>respond to the magnetic fields only (that is almost).
>
>Peter

Hi Peter,

I went through this with small transmitting loops for medical
applications, and with receiving loops. I guess it depends on what almost
is, hi.

If the loop is a multi-turn loop, adding the "shield" does modify
induction electric field coupling near the antenna, but if it is a single
turn loop nothing much changes except it appears the field originates on
the shield instead of the inner conductor. In all cases, the E-field is
very much present.

With time varying fields, to eliminate the electric field we must also
completely eliminate the magnetic field. If we did that, we would also
eliminate all radiation.

I think the problem centers around the fact we too often consider electric
fields as related to electrical noise or interference, and magnetic fields
as things we use to communicate. I can think of many cases where induction
field coupling is more harmful via either the electric or magnetic field.
In a car, I would certainly prefer a strong local electric field coupling
over strong magnetic field coupling to minimize RFI.

73 Tom


From [e-mail] Thu Jan 02 17:16:13 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Help with top-loaded 80m vertical
Date: 22 Dec 1996 08:15:13 GMT
Organization: AOL http://www.aol.com
Lines: 28
Message-ID: <[e-mail]>
References: <[e-mail]>
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In article <[e-mail]>,
[e-mail] (Ron Majewski) writes:

>
>Does my observed behaviour seem right, or is something amiss?  Should
>I increase the number of hat tubes?  Do you think I'd be better off
>converting the antenna to an inverted-L and not mess around with the
>tubes?
>
>I'd appreciate any insights you might be able to offer me.
>
>Thanks much and Happy Holidays to all!
>
>73,
>
>Ron (W8RU).

Hi Ron,

One test would be to add several more temporary radials (laying them on
the ground is ok) and watch for frequency shift.

I suspect the hat change is too small, and the radials are contributing to
cancelation of feedpoint reactance and dominating system tuning. From what
I have measured, four radials are not near enough if you want better than
20 % efficiency.

73 Tom


From [e-mail] Thu Jan 02 17:16:14 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: FS: CB Service Manuals (Tram)
Date: 22 Dec 1996 08:15:16 GMT
Organization: AOL http://www.aol.com
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References: <[e-mail]>
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In article <[e-mail]>, [e-mail] writes:

>>----------------------------------------------------------
>Perhaps the origina poster just thought anyone reading a radio
>oriented newsgroup would have some interest in the items. A kinder,
>gentler answer wouldn't have hurt.
>--
>73,
>Butch N2YMJ
>
>

Anyone silly enough to sell CB manuals deserves a terse reply. He didn't
read the FAQ of the newsgroups.

1.) These groups are NOT the place for for sale postings of any types,
that's in the FAQ list

2.) The fact it is CB puts it out of amateur groups, that's in the FAQ
list

3.) This is an antenna group, that's in the heading.

4.) A Tram is a CB radio that is designed to be easily modified to VFO
operation and power changes. It is designed outside the sprit of the law
for those who enjoy operating outside the CB band, and was forced off the
market at various times by the FCC.

Four strikes and he's out. The place to sell stuff is not here, and the
place to sell CB junk is in the CB section. I stand by my comment, what
the hell does a tram manual have to do with a Ham antenna forum.

The correct answer to my question is "NOTHING".

73 Tom


From [e-mail] Thu Jan 02 17:16:15 1997
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From: [e-mail] (John Moran)
Newsgroups: rec.radio.amateur.antenna,rec.radio.shortwave
Subject: Re: SWL longwire
Followup-To: rec.radio.amateur.antenna,rec.radio.shortwave
Date: 22 Dec 1996 08:57:15 GMT
Organization: GoodNet
Lines: 8
Message-ID: <59it5b$[e-mail]>
References: <[e-mail]> <591rqf$[e-mail]>
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for a SW longwire..try attatching a wire to the radio hat is connected to
the air conditioning ducting..that's what I've done..works quite
well...the duct work runs the entire length of the house
 --
---
JOHN/PHX ([e-mail]) computing & making good Chemistry!
-------



From [e-mail] Thu Jan 02 17:16:16 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Diamond SG7900 mounting suggestions?
Date: Sun, 22 Dec 1996 13:57:16 GMT
Organization: XMission Internet (801 539 0900)
Lines: 53
Message-ID: <59jbem$[e-mail]>
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[e-mail] (Eric S. Hvozda) wrote:


>I'm looking to put a 2m/70cm mobile in my Toyota 4x4 truck.

>I have a problem tho.  I'd really like to put the Diamond SG7900 on,
>(it's a 7/8 wave [ie ~62 inches tall]).  However, I am concerned
>about the height factor (ie will I clear most under passes?
>the roof is 6th now); so I have doubts about a roof mount.

You didn't do your homework, did you?   Truck is 6 ft you say, antenna
is 5 ft plus = 11 ft and a possible 2-3 inches more.  Now how tall are
semi-trucks?  Better than 11 feet.  As I drive around, most
underpasses are posted.  As I remember, at least the ones on freeways,
heights range from 12' plus to 14' plus.  I would be more concerned
about above-underground parking lots of multiply levels, or low
hanging tree branches.   You will most likely not fit in those.

>Far as a bed mount, I have no stake holes in my bed plus I have a
>tonneau cover.

>What about a rear bumper mount?  On one of the sides?  Will it be
>strong enough to support the weight?  What about wind?  Will I need
>guy lines to keep this rig erect at 65MPH?

I would presume that if Diamond sold it as a mobile antenna, which
they do, then it would be constructed sufficiently to withstand normal
highway speeds.  65MPH falls into "normal"  highway speeds.

I would try real hard to mount the antenna on the biggest, flattest
surface of the truck as possible , with the least amount of metal
around it,  i.e., the roof.  If you do not, then the performance may
suffer and then you have basically wasted whatever additional gain the
Diamond has over the other brand of antenna.


Question back to you.  The only advantage the 7900 has over a 5/8 wave
antenna is an extra 2DB of gain on VHF.  On a Larson Dual bander 2/70
the advantage is something like 2.5 DB gain.  Will you ever see or
need  that little bit extra?  Diamond 7900 cost about twice what a
Larson dual band antenna cost.  Is it worth the hassle?


Ross
N7VWX

>Sorry for all the questions, but this group seems like a decent
>place to start.  73s!
>--
>Ack!
>Creek, not creek; Pop not soda; Car needs washed; Gumband...




From [e-mail] Thu Jan 02 17:16:17 1997
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From: [e-mail](Jeff Anderson)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: ** Transmitting Loop on Mobile: Why not? **
Date: 22 Dec 1996 14:02:21 GMT
Organization: Netcom
Lines: 32
Message-ID: <59jf1d$[e-mail]>
References: <59hrcl$[e-mail]> <[e-mail]>
NNTP-Posting-Host: pax-ca14-12.ix.netcom.com
X-NETCOM-Date: Sun Dec 22  8:02:21 AM CST 1996

In <[e-mail]> [e-mail]
writes:
>
>In article <59hrcl$[e-mail]>, [e-mail]
(Peter
>Somlo) writes:
>
>>How about electrically shielded loop antennas? They can be made to
>>respond to the magnetic fields only (that is almost).
>>
>>Peter
>
>If the loop is a multi-turn loop, adding the "shield" does modify
>induction electric field coupling near the antenna, but if it is a
>single turn loop nothing much changes except it appears the field
>originates on the shield instead of the inner conductor. In all cases,
>the E-field is very much present.
>

But Tom, if the shield is split and grounded and the loop within the
shield fed balanced to the receiver, doesn't the antenna then only
respond to the magentic component of the field?   That is, isn't the
induction electric field shunted to ground?

An example of such an antenna is described in Henry Ott's "Noise
Reduction Techniques in Electronic Systems" (figure 2-30 in the 2nd
edition).  Is he incorrect, or is there something here that I'm
missing?

Thanks,

- Jeff, WA6AHL


From [e-mail] Thu Jan 02 17:16:18 1997
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From: [e-mail] (Riccardo Gaggioli)
Newsgroups: rec.radio.swap,rec.radio.amateur.antenna,rec.radio.amateur.digital.misc,rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.amateur.misc,rec.radio.amateur.misc,rec.radio.amateur.policy,rec.radio.amateur.space,rec.radio.amateur.dx
Subject: Re: Want Kenwood IF-10D Computer Interface.
Date: 22 Dec 1996 15:13:36 GMT
Organization: Centro Servizi Interbusiness
Lines: 4
Message-ID: <[e-mail]>
References: <56l7cr$[e-mail]> <56na4m$[e-mail]>
NNTP-Posting-Host: slip4.etrurianet.it
Xref: news1.epix.net rec.radio.swap:100694 rec.radio.amateur.antenna:33061 rec.radio.amateur.digital.misc:20812 rec.radio.amateur.equipment:44842 rec.radio.amateur.homebrew:22276 rec.radio.amateur.misc:121395 rec.radio.amateur.policy:44527 rec.radio.amateur.space:9192 rec.radio.amateur.dx:1641


Hello mike,I own a kenwood ts 50,and I would like if there is a 'home
made' version of IF-10D ,usable with our rtx:any help?
73,cu on 40 & 80 fm IK5WQO Riccardo


From [e-mail] Thu Jan 02 17:16:19 1997
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From: ko4qc <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: TICKLE ME ELMO
Date: Sun, 22 Dec 1996 10:53:04 -0500
Organization: Concentric Internet Services
Lines: 10
Message-ID: <[e-mail]>
References: <01bbeee3$693e5460$[e-mail]> <[e-mail]>
Reply-To: [e-mail]
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charles copeland wrote:
>
> In article <01bbeee3$693e5460$[e-mail]>,
> Debonair <[e-mail]> wrote:
> >CALL PAT AND MAKE ME AN OFFER ON A BRAND NEW TICKLE ME ELMO 609-783-7777
>
> On what bands will an "Elmo" load up on?
  The vivid color of this particular 'item' makes it excellent for
sighting-in all those new rifles/handguns Santa is going to bring us;<)
                                         Ko4qC


From [e-mail] Thu Jan 02 17:16:20 1997
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From: ko4qc <[e-mail]>
Newsgroups: rec.ham-radio,rec.radio.amateur,rec.radio.amateur.antenna,rec.radio.amateur.equipment,rec.radio.amateur.misc
Subject: Re: Setting up an antenna tower.
Date: Sun, 22 Dec 1996 10:55:27 -0500
Organization: Concentric Internet Services
Lines: 21
Message-ID: <[e-mail]>
References: <01bbeb67$8fcce7b0$0fb919ce@davidh> <[e-mail]>
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Rick wrote:
>
> "David P. Hummel, Jr." <[e-mail]> wrote:
>
> >I have recently come to own a previously used antenna tower.  After months
> >of hard work, I managed to finally get it out of the ground.  That was the
> >hard part.  But here is the fun part.  Anybody have any ideas how I can dig
> >a hole in the ground that is about 2.5ft in diameter and about 6.5ft deep?
> >I tried a post hole digger, but the bits are only about 4 ft deep?   Any
> >suggestions?
> >
> >Thank you in advance.
> >David P. Hummel, Jr.
> >KG2BX
> >
> Dave,myself I used a back-hoe.Really the only you could do it the easy
> way....gud luck......73 de AA4UF  Rick        [e-mail]
   Took you months to get it out of the ground?Sounds like an excellent
installation job!!
               Seasons Greetings to ALL!!
                    Ko4qC


From [e-mail] Thu Jan 02 17:16:21 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!newsfeed.concentric.net!news-master!news
From: ko4qc <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Plans 2m 3el Beam?
Date: Sun, 22 Dec 1996 10:58:19 -0500
Organization: Concentric Internet Services
Lines: 41
Message-ID: <[e-mail]>
References: <[e-mail]>
Reply-To: [e-mail]
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To: [e-mail]

Brian K. Short wrote:
>
> I am trying to build a 3 el beam for 2m that can be used
> with a photographic tripod.  So far, I have constructed a
> frame from PVC tubing, dimensions below.
>
> My plan is to cut the reflector and director from RG-59 cable
> and place them in the tubing (this has been done).
>
> The last step is the driven element where I have encountered
> difficulty in matching (have not spent too much time yet).
>
> I am looking for a cookbook type solution for matching the
> driven element in either a dipole or folded dipole configuration,
> keeping in mind that I would like to run up to 160 watts with
> my IC-706 and B1016 amplifier.
>
> Since the photographic tripod allows rotating from horizontal
> to vertical polarization easily, I would like to have sufficient
> bandwidth for 144.2 as well as FM for portable use to complement
> my mobile 5/8 and KB6KQ horizontal maxi-loop.
>
> Dimensions:
> Reflector - 40"   Driven - 38.2"   Director - 37.8"
> R-DE-D spacings both 18"
>
> Any comments or other pointers on this project are welcome.
>
> I would like to construct the driven element and matching
> device from 450 ohm ladder line/300 ohm ladder line/RG-59/
> RG-93 etc...common materials on hand, but some guidance is
> quite welcome.
>
> (Also, I have been testing with an MFJ antenna analyzer which
>  can be used to complete assembly/tuning of the driven element)
>
> [e-mail]
   Have you considered the 'Quagi' type antenna?Quad REF and DRI...Yagi
DIR elements.DRI can be fed directly w/50 ohm coax...no matching
necessary.I have built several of these for 2 mtr and 440 MHz.
                                          Ko4qC


From [e-mail] Thu Jan 02 17:16:22 1997
Path: news1.epix.net!news3.epix.net!uunet!in3.uu.net!204.71.0.48!newsfeed.internetmci.com!ns2.sirinet.net!news
From: "Big Red" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: help help help 23cm and a 2m  2elm mini beam
Date: 22 Dec 1996 16:00:58 GMT
Organization: Sirius Systems Group, Inc.
Lines: 8
Message-ID: <01bbf021$a29855a0$165003cf@jim-beck>
NNTP-Posting-Host: ppp22.sirinet.net
X-Newsreader: Microsoft Internet News 4.70.1155

I need to build a 23cm ground plane and I dont know how to do it have you
any idea or a referring program.
Also I saw a 2m 2elm mini beam that can be built that looked like a dipole
with an extra elm and I can't find it again to print it out. It was built
with tubing and pvc.
PLEASE e-mail with any help you can give ......................thank you
:KV%JVN Oklahoma



From [e-mail] Thu Jan 02 17:16:23 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna,alt.radio.scanner,rec.radio.scanner
Subject: Re: scanner antenna
Date: Sun, 22 Dec 1996 16:57:32 GMT
Organization: Netcom
Lines: 21
Message-ID: <[e-mail]>
References: <[e-mail]>
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On Mon, 16 Dec 1996 21:17:55 -0500, Aaron Myers <[e-mail]>
wrote:

>I thought this would be the best place to put this since I have
>questions about antenna(s).  I wanted to extend the listining area on my
>radio as well as my hand held scanner.  I would like an indoor
>antenna(s) for them but if I must, an outdoor will do.  Does anyone have
>any suggestions??  Thanks in advance.
>
>Sin a.k.a. Aaron
>-----------------------------
>Nothing is impossible for the
>one who doesn't have to do it
>-----------------------------
>http://www.csra.net/amyers
>-----------------------------
>[e-mail]
Radio shack discone,2-10' poles,50-100ft` of good cable and 2 chimney
clamps.No guy wire needed.Poles and antenna catch very little
wind.Great reception.Live on LI and receive city agencies no
problem,50+ miles


From [e-mail] Thu Jan 02 17:16:24 1997
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From: [e-mail] (MURPHY ELECTRONICS)
Newsgroups: rec.radio.amateur.antenna
Subject: HAM TOOLKIT CDROM.HERE!!!
Date: Sun, 22 Dec 1996 17:16:15 GMT
Organization: Indigo
Lines: 6
Message-ID: <[e-mail]>
NNTP-Posting-Host: ts17-01.dublin.indigo.ie
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Newsreader: Forte Agent .99g/32.339

THE HAM TOOL-KIT Cd Rom.
An AWSOME collection of amateur radio related software
http://sphynx.com/murphy

Plastic Accepted.



From [e-mail] Thu Jan 02 17:16:24 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.net!news.idt.net!nntp.farm.idt.net!news
From: [e-mail] (David Brandt)
Newsgroups: rec.radio.amateur.antenna
Subject: antenna tower
Date: Sun, 22 Dec 1996 17:29:12 GMT
Organization: IDT
Lines: 5
Message-ID: <59jum0$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: ppp-52.ts-5.chi.idt.net
X-Newsreader: Forte Free Agent 1.0.82

I have a 45 foot antenna tower to dismantle; but do not know how to
approach the problem.  The tower is free-standing and is too close to
other things: buildings, power lines, etc. to lay the tower down.
Does anyone have any suggestions?



From [e-mail] Thu Jan 02 17:16:28 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: ** Transmitting Loop on Mobile: Why not? **
Date: 22 Dec 1996 17:31:08 GMT
Organization: AOL http://www.aol.com
Lines: 32
Message-ID: <[e-mail]>
References: <59jf1d$[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]
X-Newsreader: AOL Offline Reader

Hi Jeff,
In article <59jf1d$[e-mail]>,
[e-mail](Jeff Anderson) writes:

>But Tom, if the shield is split and grounded and the loop within the
>shield fed balanced to the receiver, doesn't the antenna then only
>respond to the magentic component of the field?

No. Jan explained that pretty well in his post. The shield in a single
turn loop has exactly the same open end voltage and distributed voltage as
the center conductor does. It just makes the loop conductor look thicker
while increasing resistive loss a bit.

It's related to the things dis-cussed in the coaxial cable thread that
went on and on (if you followed that thread).

In a multiturn loop, the shield has the averaged value of the individual
turns voltage across the open ends and all points around the wires.

>An example of such an antenna is described in Henry Ott's "Noise
>Reduction Techniques in Electronic Systems" (figure 2-30 in the 2nd
>edition).  Is he incorrect, or is there something here that I'm
>missing?

The only case I can think of where it helps is when the loop is balanced
and ground independent directly driving a differential amplifier that is
sensitive to common mode signals. In that case the shield would help.

I can't think of other cases where it is useful but maybe someone else
can.

73 Tom


From [e-mail] Thu Jan 02 17:16:29 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Grounding system?
Date: 22 Dec 1996 17:31:16 GMT
Organization: AOL http://www.aol.com
Lines: 18
Message-ID: <[e-mail]>
References: <59jotd$[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]
X-Newsreader: AOL Offline Reader

In article <59jotd$[e-mail]>, [e-mail] writes:

>
>I think I mis-implied this.  I was thinking more about the practice that
I
>have seen done where the coax is bonded over and over again to the side
of
>the tower on the way down, not at the bottom.
>
>

I agree with Gary's ground system analysis MIke, but I wanted to inject
aanother reason to bond the cable to the tower. I sometimes had arcing
problems from RF arcing through the jacket to the tower leg (<grin>). I
can image what lightning does.

73 Tom



From [e-mail] Thu Jan 02 17:16:30 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.idt.net!newsfeed.internetmci.com!realtime.net!news
From: "James B. Mohler" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Mosley TA-53-M
Date: 22 Dec 1996 17:32:20 GMT
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Any comments regarding overall performance of the Mosley TA-53-M. Anyone
out there have one? 73, Jim W8LIQ. [e-mail]



From [e-mail] Thu Jan 02 17:16:31 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Inexpensive guy wire insulators ???
Date: 22 Dec 1996 17:40:20 GMT
Organization: AOL http://www.aol.com
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In article <[e-mail]>, Bob Lewis <[e-mail]>
writes:

>I remember seeing an article in 1993 QST which said that computer
>modeling and "on the air performance tests" indicate the breaking up the
>guy wires is not worth the effort. I use non-conductive guys so I have
>no idea if this is so or not. It might be worth looking into.


I do not believe that. My experience has always been that breaking up the
guy lines is a VERY good idea.

People can't detect a ten db change unless it's in a big series of  A-B
tests. I can't imagine doing a guy line broken up, guy line not broken up
test. It would take days to do the switchover, and by then conditions
would change.

When I modeled a 40 meter beam at 140 feet on the best modeling program in
the world (shameless plug, eh) Eznec, there was a very large change when I
added one set of guy lines at 70 feet !!! It was almost like lowering the
antenna 70 feet.

73 Tom


From [e-mail] Thu Jan 02 17:16:32 1997
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From: [e-mail](Jeff Anderson)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: ** Transmitting Loop on Mobile: Why not? **
Date: 22 Dec 1996 18:34:45 GMT
Organization: Netcom
Lines: 49
Message-ID: <59jv05$[e-mail]>
References: <59jf1d$[e-mail]> <[e-mail]>
NNTP-Posting-Host: pax-ca24-10.ix.netcom.com
X-NETCOM-Date: Sun Dec 22 10:34:45 AM PST 1996

In <[e-mail]> [e-mail]
writes:
>>[e-mail] wrote:
>>
>>An example of such an antenna is described in Henry Ott's "Noise
>>Reduction Techniques in Electronic Systems" (figure 2-30 in the 2nd
>>edition).  Is he incorrect, or is there something here that I'm
>>missing?
>
>The only case I can think of where it helps is when the loop is
>balanced and ground independent directly driving a differential
>amplifier that is sensitive to common mode signals. In that case the
>shield would help.
>

Thanks for the reply, Tom.

I think your example is exactly what Ott describesin his book and what
Peter meant in an earlier post by an "electrically isolated" loop (I
hope the quote is correct).

Ott's loop with split shield looks (crudely rendered) like this...

    ------------shield-------
   | -------inner wire------ |
   | | --------shield----- | |
   | | |                 | | |
   | | |                 | | |
   --|--                 |  -|---------
     |  shield split     |   |       Rload
   --|--                 |  -|---------
   | | |                 | | |
   | | |                 | | |
   | | ------------------- | |
   | ----------------------- |
   |-------------------------o
                             |
                            GND

Although drawn with an inner and outer shield, imagine it instead as a
piece of coax with the shield split. The shield goes to ground, and the
inner loop goes to the load.  Note that the loop is ground independent
and driving a differential receiver (Rload).

Is this what you meant?  Or is there still a problem with electrical
isolation of this loop?

- Jeff, WA6AHL



From [e-mail] Thu Jan 02 17:16:33 1997
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From: "Cecil A. Moore" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Coax
Date: Sun, 22 Dec 1996 11:43:59 -0700
Organization: Delphi Internet Services Corporation
Lines: 10
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References: <[e-mail]>
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[e-mail] wrote:
> Is Belden 9913 worth using for a 70' run from transmitter to antenna?
> Butch N2YMJ

Hi Butch, my rule-of-thumb - 9913 is worth fooling with at vhf/uhf
but not at HF. The matched line loss difference between 70' of RG-8F
and 9913 on 10m is only about 0.14dB (until one gets some water in
the 9913 :-).

73, Cecil, W6RCA, OOTC


From [e-mail] Thu Jan 02 17:16:34 1997
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From: "Cecil A. Moore" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Help me decide on an HF mobile antenna for cross country trip.
Date: Sun, 22 Dec 1996 12:03:02 -0700
Organization: Delphi Internet Services Corporation
Lines: 17
Message-ID: <[e-mail]>
References: <[e-mail]>
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Dan Dillon wrote:
> So, all of you HF mobile'rs out there.... PLEASE ... suggest an
> antenna that I can get by January.  I don't know what to get.

Hi Dan, Let's see - no holes, low-cost, automatic band changing,
reasonable performance - I wouldn't know what to get either.

Mag-mounts are expensive and work well on the lower HF bands only
if one connects the Mag-mount frame to the vehicle body with a
short wire. They only work with small (inefficient) antennas like
single-band hamsticks. The three magnet style is not quite strong
enough for windy conditions at hiway speeds. I don't know of any
low-cost multi-band antennas. Automatic band changing can be
done with a screwdriver but there are no inexpensive
screwdrivers and they sure won't work with a mag-mount.

73, Cecil, W6RCA, OOTC


From [e-mail] Thu Jan 02 17:16:37 1997
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From: Jacqui <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Antenna's for AM
Date: Sun, 22 Dec 1996 14:04:52 -0500
Organization: Century21
Lines: 25
Message-ID: <[e-mail]>
References: <[e-mail]>
Reply-To: [e-mail]
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To: Charlie Bennett <[e-mail]>

Charlie Bennett wrote:
>
> Have any of you tried the Select-A-Tenna for AM reception? I'd like to
> get some feedback before I buy it.
>
> Is there any AM antenna that's better? I have a 200ft wire that's
> alright, nothing like what I need. Thanks much
>
> Charlie Bennett
> [e-mail]


Our friend just got one at a Hamfest and brought it over the house.  We
tried it on a Sony 2010, an old Transoceanic and a 60's transistor radio
all with outstanding results.  You can do some nulling and the signal
increases of DX stations were not to be believed.  I think it can be
lots of fun, get yourself a Lazy Susan to put it and a portable radio on
and you can direct the entire set-up to the station you want !  KIWA
just came out with a similar unit.  You can check their WWW page which I
don't have right now to pass on.  Their unit is said to be better and
less money.  (That was per the AD so consider the source.)  There is
lots better if you get heavy into MW DX but they are lots more money
too. I would like to buy a KIWA MW Loop if one comes around used for the
right price.  Another option is to build one, you can find plans for
many searching the WWW as well ! Jacqui N1DVE


From [e-mail] Thu Jan 02 17:16:38 1997
Message-ID: <[e-mail]>
Date: Sun, 22 Dec 1996 11:27:56 -0800
From: "Mark L. Bary" <[e-mail]>
Reply-To: [e-mail]
Organization: This is my Organization Line
X-Mailer: Mozilla 3.0 (Win16; U)
MIME-Version: 1.0
Newsgroups: rec.radio.amateur.antenna
To: Paul Erickson <[e-mail]>
Subject: Re: 40mtr 2 element quad vs yagi?
References: <587hhe$[e-mail]>
Content-Type: text/plain; charset=us-ascii
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Paul Erickson wrote:
>
> Hi Everyone,
>
> In the next year I may be in a position to put up a tower (70ft)
> and I have a 4 element quad (30ft boom) in storage. For 40mtrs I'm
> wondering if I should replace the outer spreaders to accomodate a 2 el
> quad, or if I should be looking for a 2el yagi?
>
> One of the advantages of modifing the quad is that I will then be able
> to change it to include the warc bands, including 30mtrs.
>
> Any suggestions would be appreciated.
>
> cheers, Paul
> VE7CQK
> email: [e-mail]

Paul,

Seems to me that if you have the ability and geography, the most
rewarding way to go would be with the Quad.

I know there is some controversy over the advantages of quads vs. yagis,
but here you would also be getting some WARC bands in the bargin. Which
you wouldn't if you went with the Yagi.

73,

Mark
N4EOC
Germantown, MD


From [e-mail] Thu Jan 02 17:16:39 1997
Message-ID: <[e-mail]>
Date: Sun, 22 Dec 1996 11:46:31 -0800
From: "Mark L. Bary" <[e-mail]>
Reply-To: [e-mail]
Organization: This is my Organization Line
X-Mailer: Mozilla 3.0 (Win16; U)
MIME-Version: 1.0
Newsgroups: rec.radio.amateur.antenna
To: [e-mail]
Subject: Re: Antenna in attic?
References: <[e-mail]>
Content-Type: text/plain; charset=us-ascii
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Gary T. Craze wrote:
........................snip......................
> Any suggestions?
>
> Many thanks,
> Gary
>

Gary,

I've had very good success working 2m/70cm with a Diamond X-50 on my
porch of my apartment on the top floor of a 3 story apartment building!
Of course, I do experience some "shadowing" while trying to work
"through" the building, but I can hit all the major repeaters in the
area.  I imagine if I was in the attic I'd have a little less
"shadowing" to deal with, but I don't have access to the attic.

If you are thinking of trying a beam configuration, look into the
dual-band corner beam as sold by Antennas West.  It says it has 10dB
gain on 2m with a 40dB front to back ratio, and 1.1:1 across the band.
They advertise in 73 and most of the other mags.  The attraction here
for you would be the size: "no dimension over 4'".

73
Mark
N4EOC
Germantown, MD


From [e-mail] Thu Jan 02 17:16:40 1997
Message-ID: <[e-mail]>
Date: Sun, 22 Dec 1996 12:01:19 -0800
From: "Mark L. Bary" <[e-mail]>
Reply-To: [e-mail]
Organization: This is my Organization Line
X-Mailer: Mozilla 3.0 (Win16; U)
MIME-Version: 1.0
Newsgroups: rec.radio.amateur.antenna
To: Dick Merryman <[e-mail]>
Subject: Re: Need tower installer in Maryland
References: <[e-mail]>
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
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Dick Merryman wrote:
>
> Can anyone recommend a tower installation company that works in the
> Annapolis area?  I've exhausted the phone book and can't get any
> referrals from either HRO or MRC.
>
> Thanks for the help,
>
>                         -Dick-

Dick,

Try United States Tower Services, LTD out of Frederick, MD.
301-340-0520 or 301-874-5885.

If they can't help you, they may have some contacts for smaller
operations in the area that can.  I believe there was one by the name of
East Coast Antenna Service out of Rockville or Gaithersburg, but I'm not
sure he's still in the business.  Hmm, just checked the yellow pages and
he's still in there at 301-972-3811.

73,

Mark
N4EOC
Germantown, MD


From [e-mail] Thu Jan 02 17:16:41 1997
Newsgroups: rec.radio.amateur.antenna
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From: [e-mail] (Jens Goerke)
Subject: Re: Blocking ham/cb interference on stereo equipment?
X-Newsreader: TIN [version 1.2 PL2]
Organization: Private Multi-Site
Message-ID: <[e-mail]>
References: <59jrda$[e-mail]>
Date: Sun, 22 Dec 1996 20:01:50 GMT
Lines: 22

Kingfish ([e-mail]) wrote:
[...]
> I know there are filters you can put on your telephone to block some
> of the interference.  Is there anything like that for stereo
> equipment?

Fortunately, filters for stereo equipment are readily available.
Before buying, I would check the local HAM/CB-clubs; quite a lot
of the local clubs have sets of filters for several purposes and
different equipment. This way you can try the available filters
and find the one(s) best suited for your needs. If you ask as
friendly and polite as you did here you will also find someone
willing to help. You will probably even get a list of affordable
sources for the necessary filters.

Hope that helps,
        Jens, DB9LL
--
at work: [e-mail], [e-mail] (http://barbara.combtx.com/~jg)
at home: [e-mail]
at play: jg@beach, griffin@rpg, db9ll@g-qrp/darc
"You beeped me for WHAT?"


From [e-mail] Thu Jan 02 17:16:42 1997
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From: [e-mail] (Fractenna)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Blocking ham/cb interference on stereo equipment?
Date: 22 Dec 1996 21:03:10 GMT
Organization: AOL http://www.aol.com
Lines: 4
Message-ID: <[e-mail]>
References: <59jrda$[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

Yes; you can buy such filters at Radio Shack. If its a ham, I would be
VERY surprised if he or she didn't volunteer to install/make suggestions.

Chip N1IR


From [e-mail] Thu Jan 02 17:16:43 1997
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From: Rush Johnson <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: antenna tower
Date: Sun, 22 Dec 1996 16:05:58 -0500
Organization: Bell Atlantic Internet Solutions
Lines: 23
Message-ID: <[e-mail]>
References: <59jum0$[e-mail]>
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David Brandt wrote:
>
> I have a 45 foot antenna tower to dismantle; but do not know how to
> approach the problem.  The tower is free-standing and is too close to
> other things: buildings, power lines, etc. to lay the tower down.
> Does anyone have any suggestions?

Depending on the type of tower (manufacturer, model, etc.), you should
dismantle the tower in sections.  Typical amateur towers are in
"reasonable" sized sections and can be pulled apart using a gin pole.
You should be able to borrow one from a resourceful ham in the area, or
possibly rent one.

Also, spend some time in advance spraying any corroded bolts with some
WD40 or like to make 'em a littler easier to unbolt.  Same thing with
where the tower legs slide together.  Otherwise, you'll get pretty
frustrated trying to pull the thing apart at 50'....also can be
dangerous.

Find someone who has done this before, and buy 'em lunch for their help!

73,
Rush (NR4M)


From [e-mail] Thu Jan 02 17:16:44 1997
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From: [e-mail] ()
Newsgroups: rec.radio.amateur.antenna
Subject: Problem with RF - HELP!
Date: 22 Dec 1996 21:08:06 GMT
Organization: Clark Internet Services, Inc., Ellicott City, MD USA
Lines: 6
Message-ID: <59k7vm$[e-mail]>
NNTP-Posting-Host: 100-explorer.clark.net
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I just bought a receiver and a powered indoor antenna. I receive signals
just fine as long as the computer is off. When I turn the computer on, it
generates so much garbage RF that the receiver gets very little FM and NO
AM. If anyone has a solution to this problem, please reply via email.

Thanks - MdS


From [e-mail] Thu Jan 02 17:16:44 1997
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From: aor <[e-mail]>
Newsgroups: rec.ham-radio,rec.radio.amateur,rec.radio.amateur.antenna,rec.radio.amateur.equipment,rec.radio.amateur.misc
Subject: Re: Setting up an antenna tower.
Date: Sun, 22 Dec 1996 16:26:12 -0500
Organization: gteais-org
Lines: 9
Message-ID: <[e-mail]>
References: <01bbeb67$8fcce7b0$0fb919ce@davidh>
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To: "David P. Hummel, Jr." <[e-mail]>
Xref: news1.epix.net rec.radio.amateur.antenna:33086 rec.radio.amateur.equipment:44865 rec.radio.amateur.misc:121430

I contracted with a "tree planter" (look in the Yellow Pages)  who
advertised digging holes with a Bobcat.  I asked the largest auger they
had, which was 36" !!!!  $100 bucks later I had a perfect hole 36"
across and 6-1/2 feet deep.  My tower is a TriEx crankup to 51', and has
been up 4 years now.

73, and good luck.

AL, NW2M


From [e-mail] Thu Jan 02 17:16:45 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: test
Date: 22 Dec 1996 13:58:13 -0800
Organization: testorg
Lines: 1
Sender: [e-mail]
Message-ID: <59katl$[e-mail]>
NNTP-Posting-Host: dialup063.hasselt.eunet.be

testinfo


From [e-mail] Thu Jan 02 17:16:46 1997
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From: [e-mail] (Fractenna)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Problem with RF - HELP!
Date: 22 Dec 1996 22:43:14 GMT
Organization: AOL http://www.aol.com
Lines: 5
Message-ID: <[e-mail]>
References: <59k7vm$[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

I bet u receive lots of suggestions; here's one obvious one. Put ferrite
filters on the LINE CORDS for the computer AND powered antenna.Also, if u
ground anything, try ferrite there too.

Chip N1IR


From [e-mail] Thu Jan 02 17:16:47 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!newsxfer2.itd.umich.edu!cliffs.rs.itd.umich.edu!portc01.blue.aol.com!newsstand.cit.cornell.edu!intac!magsystems!cybernet!roland.stiner
From: [e-mail] (Roland Stiner)
Date: 22 Dec 96 22:46:00 GMT
Newsgroups: rec.radio.amateur.antenna
Message-ID: <[e-mail]>
X-FTN-To: [e-mail]
Organization: MAG Systems, Inc/TFP BBS
To: [e-mail]
Subject: Veritcal vs. G5RV ???
Lines: 18


H>I'm aware that the vertical offers a lower angle of radiation which is
 >ideal for DXing however  I'm leaning towards the G5RV since I'm
 >reluctant to the thought of greatly reducing  the usuable space in the
 >backyard once the vertical is installed.
 >I'm not much of a DX chaser anyway...my HF operation is more casual.
 >I just wonder after all considered if the G5RV would be a  compromise
 >compared to the vertical.

I do not have space for a full size G5RV so I have to use the vertical.
But, if I had the choice, I would go for the G5RV (which I use when I'm
in DU.)  Performs much better and it has no adjustments.  Just solder it
up and away you go.

---
   OLX 1.53   PRIVATE REPLIES?  TO E-MAIL ADDRESS: [e-mail]

--


From [e-mail] Thu Jan 02 17:16:48 1997
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From: [e-mail] (Roland Stiner)
Date: 22 Dec 96 22:46:00 GMT
Newsgroups: rec.radio.amateur.antenna
Message-ID: <[e-mail]>
X-FTN-To: [e-mail]
Organization: MAG Systems, Inc/TFP BBS
To: [e-mail]
Subject: Re: MFJ259 antenna analyz
Lines: 19


CS>From: Costas Spanos <[e-mail]>

CS>The 259 is great, but I did find out one thing using it: Try to do so
  >when the band is quiet. The 259 sends a small signal to the antenna and
  >is looking for reflected power. This signal level is very small, and
  >easily comparable with strong signals that your antenna might be
  >receiving at the time. Since the front end of the 259 is not very
  >selective, strong signals in nearby frequencies might also influence
  >the measurements.

You would do better with the 209B (or 204B can't remember the
number right now) resistance meter. I found that to work much better and
be more useful.

---
   OLX 1.53   PRIVATE REPLIES?  TO E-MAIL ADDRESS: [e-mail]

--


From [e-mail] Thu Jan 02 17:16:49 1997
Path: news1.epix.net!news3.epix.net!uunet!in2.uu.net!205.252.116.190!feed1.news.erols.com!howland.erols.net!nntp.crl.com!news.pbi.net!news.pacbell.net!usenet
From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Verticals and RFI
Date: Sun, 22 Dec 1996 15:41:27 -0800
Organization: Pacific Bell Internet Services
Lines: 19
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
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[e-mail] wrote:
>
> In article <[e-mail]>, [e-mail] writes:
>
> >Problems were with the wireing ie: phone ,TV lead in, stereo.
> >Just Choked the hell out of them.
> >No problems now.
>
> Is that any way to treat the people complaining? ;-)
>
> Tom


Tom
No No choke the wires not the people.  If choking the wires doesn't work
than think about the people. Wait until after Christmas.
Meyyer Christmas and great DX New Year.
Lou
KB6FFT


From [e-mail] Thu Jan 02 17:16:49 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Problem with RF - HELP!
Date: Sun, 22 Dec 1996 23:45:39 GMT
Organization: ENTER.NET
Lines: 15
Message-ID: <32bdc7bb.5398852@news>
References: <59k7vm$[e-mail]>
NNTP-Posting-Host: m40atwn-1-38.enter.net
X-Newsreader: Forte Free Agent 1.1/16.230

On 22 Dec 1996 21:08:06 GMT, [e-mail] () wrote:

>I just bought a receiver and a powered indoor antenna. I receive signals
>just fine as long as the computer is off. When I turn the computer on, it
>generates so much garbage RF that the receiver gets very little FM and NO
>AM. If anyone has a solution to this problem, please reply via email.
>
>Thanks - MdS


in addition to putting ferrites on the keyboard line, etc try moving
the monitor and computer as far away from the receiver. a distance of
a few feet can really help. also, use a very good quality coax to lead
from the antenna to the rig. dont use rg58 or crap like that because
they have virtually no shielding.


From [e-mail] Thu Jan 02 17:16:50 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!feed1.news.erols.com!howland.erols.net!news2.digex.net!news6.digex.net!news.gteais.com!news
From: aor <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.equipment,rec.radio.amateur.misc
Subject: Re: 5/8" UHF or 'N' connectors needed - Call The RF Connection
Date: Sun, 22 Dec 1996 18:49:00 -0500
Organization: gteais-org
Lines: 11
Message-ID: <[e-mail]>
References: <[e-mail]>
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Xref: news1.epix.net rec.radio.amateur.antenna:33097 rec.radio.amateur.equipment:44874 rec.radio.amateur.misc:121447

Contact Joel at "The RF Connection" in Maryland.  He has almost every
type of connector.  New and used too.  Contact him at:

[e-mail]  or   http://www.therfc.com

Best of luck.  He has helped me out of a jam more than once!


73,

Al, NW2M


From [e-mail] Thu Jan 02 17:16:52 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.net!www.nntp.primenet.com!nntp.primenet.com!news.bbnplanet.com!su-news-hub1.bbnplanet.com!news.pbi.net!news.pacbell.net!usenet
From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: ?? GAP TITAN DX-VIII ??
Date: Sun, 22 Dec 1996 15:54:50 -0800
Organization: Pacific Bell Internet Services
Lines: 22
Message-ID: <[e-mail]>
References: <01bbef85$05c7f560$5b0bb2c2@jan>
NNTP-Posting-Host: ppp-207-104-173-65.scrm01.pacbell.net
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
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To: PE1PDQ <[e-mail]>

PE1PDQ wrote:
>
> Does anyone information on the HF multibandvertical TITAN DX-VIII GAP ?
>
> Tnx , Jan PE1PDQ
> --
> [e-mail] Jan,
Its a great vertical antenna.  Have had mine up since May.  Been threw a
couple of wind storms.
The people at GAP are real helpful.
Actually all I had to do was take the antenna out of the box follow easy
directions put it up and plug in.
The swr is better than 2:1 on all bands.  I have full use of the 80 M
voice band. 6M band works good even though the folks at GAP down own up
to it.  I'v heard that a HAM also got it to work on 160M .
I'v enjoyed working it, haven't had any problems with it.
Yes I would buy another one in a minute.
Any more questions ,  write me or it looks like the GAP Titan is being
talked about all over this net.
Take care&73s
Lou
KB6FFT


From [e-mail] Thu Jan 02 17:16:53 1997
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From: aor <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: FS:Butternuts (2) - Don't tease us here....
Date: Sun, 22 Dec 1996 18:57:10 -0500
Organization: gteais-org
Lines: 5
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: r1p2.gteais.com
Mime-Version: 1.0
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To: [e-mail]

If you are going to put a pointer here, why not simply just include the
text...???  There are times when it's ok not to use the dummy load!

73,
Al


From [e-mail] Thu Jan 02 17:16:54 1997
Newsgroups: rec.radio.amateur.antenna
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!netcom.com!hvozda
From: [e-mail] (Eric S. Hvozda)
Subject: Re: Diamond SG7900 mounting suggestions?
Message-ID: <[e-mail]>
Organization: NETCOM On-line Communication Services (408 261-4700 guest)
References: <[e-mail]> <59jbem$[e-mail]>
Date: Mon, 23 Dec 1996 01:41:20 GMT
Lines: 25
Sender: [e-mail]

In article <59jbem$[e-mail]>,  <[e-mail]> wrote:
>
>Question back to you.  The only advantage the 7900 has over a 5/8 wave
>antenna is an extra 2DB of gain on VHF.  On a Larson Dual bander 2/70
>the advantage is something like 2.5 DB gain.  Will you ever see or
>need  that little bit extra?  Diamond 7900 cost about twice what a
>Larson dual band antenna cost.  Is it worth the hassle?

I spend a lot of time driving around between Pittsburgh, PA and
Boston, MA.  I-80, 81, and 84 are fairly desolate in places, I
wanted to make sure I have sufficent 'reach' to hit the machines
out there.

Also I was under the impression that the nearly 3db in gain was going
to make the signal sound twice as loud, so I was willing to pay the price.

Perhaps I should consider soemthing more along the lines of a 1/2
or 5/8 wave antenna.  I'd really like to have the 7/8 wave, but until
I can solve the mounting problem, I think I'm going to wait on it.

I have access to a Cushcraft 5/8 wave to test drive, maybe that will
be more than enough...?
--
Ack!
Creek, not creek; Pop not soda; Car needs washed; Gumband...


From [e-mail] Thu Jan 02 17:16:54 1997
Path: news1.epix.net!news3.epix.net!uunet!in1.uu.net!161.142.201.20!news2.jaring.my!usenet
From: Peng-Kuan <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: How to improve SW reception AE3905
Date: Sun, 22 Dec 1996 18:15:18 -0800
Organization: HomeUser
Lines: 18
Message-ID: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: j13.glg4.jaring.my
Mime-Version: 1.0
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X-Mailer: Mozilla 3.01Gold (Win16; I)

Hi all,

I have a Philips AE3905 handheld powered by 2 AAA bat.
It is a very small (2X3") digital PLL LW-MW-SW-FM receiver which came
with a approx 3-metre antenna that you can clip on to its
1 feet telescopic antenna.

What is the best way to improve such a receiver's reception?
Where (WWW) can be of help on building passive indoor antennas?

Thanks.

--

-pklee

[ [e-mail] ]
[ Penang, Malaysia    ]


From [e-mail] Thu Jan 02 17:16:56 1997
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From: "news.webconn.net" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Trap Dipole
Date: 23 Dec 1996 02:52:08 GMT
Organization: WebConn, Inc.
Lines: 24
Message-ID: <01bbf07c$01c7c1a0$1061e7ce@kenkd1xs>
References: <59hh0q$[e-mail]>
NNTP-Posting-Host: 206.231.97.16
X-Newsreader: Microsoft Internet News 4.70.1155



[e-mail] wrote in article <59hh0q$[e-mail]>...
> Hi all
>
>       I recently put up my first trap dipole [from Unadilla] for 80 and
> 40. It has a 1:1 balun installed.  The lowest SWR on 40 is 1.5 at 7.150,
> and on 80 is 1.0 at 3.600.......

> I was unsure whether shortening the line needed to be done or not, since
one
> school of thought seems to be to have the line multiples of .25
wavelength.

Sounds like the antenna is matched to me.  with a 1:1 and a 1.5:1 SWR, you
have almost no loss from the coax (except for the normal attenuation/100').


Coax length on a resonant antenna for HF should make no difference in SWR.
However, if you are using a tuner for a non-resonant antenna, length will
be a factor in how easily it tunes.

73,
Ken KD1XS


From [e-mail] Thu Jan 02 17:16:57 1997
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From: [e-mail] (Cliff Kotchka)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: ** Transmitting Loop on Mobile: Why not? **
Date: Sun, 22 Dec 1996 20:54:26 -0600
Organization: InterAccess,Chicagoland's Full Service Internet Provider
Lines: 26
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]> <[e-mail]>
NNTP-Posting-Host: d231.loop.interaccess.com
X-Newsreader: Trumpet for Windows [Version 1.0 Rev B final beta #4]

In article <[e-mail]> Hank Blackstock <[e-mail]> writes
:
>From: Hank Blackstock <[e-mail]>
>Subject: Re: ** Transmitting Loop on Mobile: Why not? **
>Date: Wed, 18 Dec 1996 05:13:44 -0600

>[e-mail] wrote:
>>
>>  (WB4LNM) writes:
>>
>> >I am considering a transmitting loop antenna on my car, instead of the
>> >conventional whip.
>> >John... WB4LNM

Loops can be very effective, just remember that 2-way radio systems in general

are designed with  vertically polarized  antenna systems.  What antenna
configuration you use is not as important as how it's polarized.  If you are
trying to get into a repeater or work another mobile that has a vertically
polarized antenna and your's is horizontal, you can expect a loss of at least
20 db.

In more graphic terms, if you are using a handheld with a 1 watt output
into an antenna with the wrong polarization, you would need to add a 100 watt
amp (minimum) to build up your power to make up for the polarization mismatch.


Cliff Kotchka



From [e-mail] Thu Jan 02 17:16:58 1997
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From: [e-mail] (Cliff Kotchka)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Ground rod and rocks... HELP!
Date: Sun, 22 Dec 1996 21:03:48 -0600
Organization: InterAccess,Chicagoland's Full Service Internet Provider
Lines: 26
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]> <[e-mail]> <58mkib$[e-mail]> <59fjp4$[e-mail]>
NNTP-Posting-Host: d231.loop.interaccess.com
X-Newsreader: Trumpet for Windows [Version 1.0 Rev B final beta #4]

In article <59fjp4$[e-mail]> [e-mail] (Glenn Ziolkowski
) writes:
>From: [e-mail] (Glenn Ziolkowski)
>Subject: Re: Ground rod and rocks... HELP!
>Date: Sat, 21 Dec 1996 03:01:28 GMT

>[e-mail] wrote:

>>In article <[e-mail]>, [e-mail] wrote:
>>>ernie <[e-mail]> wrote:
>>>
>>>>Dan Walker wrote:
>>>>>
>>>>> I need to drive in a ground rod, but the earth around my QTH has so
>>>>> many rocks that it won't go in more than 18"

Try this trick.  Get a 3/4 inch iron water pipe the length of  your ground
rod.  Thread on a tee connector on one end.  Plug the through end of the tee
and hook up a garden hose to the tee end.  Run water through the pipe while
driving it.  Unless you are going through solid rock, this might do the trick.

 After you get down to  the correct depth, pull out the pipe and try driving
your ground rod.

Another alternative is to bury radials in lieu of a pipe.  This works just as
well as rod for power grounds.  You won't need many many radials.

Cliff


From [e-mail] Thu Jan 02 17:16:59 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!ddsw1!news.mcs.net!yarak.pr.mcs.net!yarak
From: John Kirby <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Distance between stacked antenna??
Date: 23 Dec 1996 03:28:42 GMT
Organization: YARAK
Lines: 8
Distribution: world
Message-ID: <59ku9a$[e-mail]>
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X-XXMessage-ID: <[e-mail]>
X-XXDate: Sun, 22 Dec 1996 03:28:41 GMT

I'am putting up an 8 ft Glen Martin roof tower w/ rotor,I'll have 5 foot
of mast above the thrust bearing and I want to put a 13 el 2 m over a 5
el 6 m, what should be the minimum space between them? (Allowing for a
reasonable space above the trust bearing.) Imput appreciated, Tks,
John/KB9NLY
   The Kirby's                               [e-mail]
 St. Charles, IL                     __________________________
     60174                         A CITIZEN IN THE STATE OF YARAK


From [e-mail] Thu Jan 02 17:17:00 1997
Newsgroups: rec.radio.amateur.antenna
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!news.sprintlink.net!news-pull.sprintlink.net!news.sprintlink.net!news-atl-21.sprintlink.net!news.magicnet.net!iag.net!newspump.sol.net!howland.erols.net!netcom.com!wa2ise
From: [e-mail] (Robert Casey)
Subject: 3 element beam seen in news pictures of Japanese res.in Peru
Message-ID: <[e-mail]>
Organization: Netcom Online Communications Services (408-241-9760 login: guest)
Date: Mon, 23 Dec 1996 03:47:14 GMT
Lines: 7
Sender: [e-mail]

Saw on TV an image of the Japanese ambassidor's residence (where the
hostage situation is currently occuring) in Peru.  Greenish night
vision image.  Saw in the bottom of the picture what looks like
a 20 meter 3 element beam atop a rotator, on a tower.  Presumidly
(during normal times) the Japanese use HF to communicate back
home.  Or it's their ham radio club station.
Think it was on CNN headline news I saw it.


From [e-mail] Thu Jan 02 17:17:00 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!news.kei.com!newsfeed.internetmci.com!newsfeed.direct.ca!nntp.portal.ca!news.bc.net!info.ucla.edu!psgrain!news.rain.net!pacifier!usenet
From: [e-mail] (derek hutter)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Distance between stacked antenna??
Date: 23 Dec 1996 04:15:58 GMT
Organization: Pacifier Internet Server [phone]
Lines: 14
Distribution: world
Message-ID: <59l11u$[e-mail]>
References: <59ku9a$[e-mail]>
NNTP-Posting-Host: ip6.van1.pacifier.com
Mime-Version: 1.0
X-Newsreader: WinVN 0.99.2

In article <59ku9a$[e-mail]>, [e-mail] says...
>
>I'am putting up an 8 ft Glen Martin roof tower w/ rotor,I'll have 5 foot
>of mast above the thrust bearing and I want to put a 13 el 2 m over a 5
>el 6 m, what should be the minimum space between them? (Allowing for a
>reasonable space above the trust bearing.) Imput appreciated, Tks,


The marketing department of the Antenna Manufacturers strike again.
Electrical Wavelenghts or Feet or would be much easier to understand.
Some manufacturers put way too elements in a given boom length.

Derek K7XD



From [e-mail] Thu Jan 02 17:17:02 1997
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From: "John Scott Mackey" <[e-mail]>
Newsgroups: rec.ham-radio,rec.radio.amateur,rec.radio.amateur.antenna,rec.radio.amateur.equipment,rec.radio.amateur.misc
Subject: Re: Setting up an antenna tower.
Date: 23 Dec 1996 04:50:55 GMT
Organization: Zip News
Lines: 14
Message-ID: <01bbf083$cab28620$292da3cd@Pjmackey>
References: <01bbeb67$8fcce7b0$0fb919ce@davidh> <[e-mail]> <[e-mail]>
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> > "David P. Hummel, Jr." <[e-mail]> > > wrote:
> >But here is the fun part.  Anybody have any ideas > >how I can dig a
hole in the ground that is about > >2.5ft in diameter and about 6.5ft deep?
 Any > >suggestions?

Well if you have any small kids around you could take two tall garbage cans
with the bottoms cut out, tape them together bottom to bottom put in hole
to protect against side cave ins.  At this point the cans should stick
above the ground about two and a half feet.  Tell the kid you need the hole
deep enough so the cans are flush with ground level.  Give the kid a garden
troll and bucket and I'll bet it takes the kid less time to dig those two
and a half feet than it took you to get the tower out of the ground.  Just
one idea...  Merry Xmas



From [e-mail] Thu Jan 02 17:17:02 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!visi.com!dimensional.com!news.wizard.com !news.ici.net!not-for-mail
From: joseph barros <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Help with folded dipole
Date: Sun, 22 Dec 1996 22:14:34 -0800
Organization: The Internet Connection
Lines: 14
Message-ID: <[e-mail]>
NNTP-Posting-Host: d-ma-fallriver-105.ici.net
Mime-Version: 1.0
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X-Mailer: Mozilla 3.0 (Win16; I)

I just inherited a folded dipole from someone that had a ham in the
family who passed away.  The only way I can install this is sloping.
There are no markings on the ballun to indicate if one end is ground
like I've seen on other balluns for standard dipoles.

Question is, does it make a difference which end is up or not.  This
thing is about 100 feet long and I would hate to  put it up backwards
and have to take it down and untanlge it again.

Personal replies would be appreciated.

Thanks
Joe
K1EZ


From [e-mail] Thu Jan 02 17:17:03 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!news.kei.com!newsfeed.internetmci.com!andromeda.peganet.net!usenet
From: [e-mail] (Nafana)
Newsgroups: alt.radio.scanner,rec.radio.scanner,rec.radio.amateur.antenna
Subject: Re: Cordless Phone Question
Date: 23 Dec 1996 07:45:16 GMT
Organization: Nafana Research Associates
Lines: 39
Message-ID: <59ldac$[e-mail]>
References: <[e-mail]> <58onj0$[e-mail]> <59b60e$[e-mail]>
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[e-mail] wrote:
[e-mail] (Nafana)writes:
>>>In article <[e-mail]>, [e-mail] wrote:
>>>I just recently purchased a 25-chanel cordless phone and was wondering
>>>how to increase its range.  I was thinking a longer antenna on the base
>>>unit (It only has a short stubby one now).
>
>>>Any suggestions?
>
>>Connect it via a impedance matching network to drive a 4CX250 tube. Use
>>that to drive a 4CX15000C.  (You'll need about 4 amps at 7.5KV).   Come
>>out of that with a Pi-net to a 4" 50-ohm heliax coax.  Run this up a
>>tower as high as you can get it- (at least 500-ft) to a 12 bay phased
>>diapole array.
>>This should give you about 75 miles.
>
>> Glad to help.
>
>> -Naf

>I disagree Naf,
>I still believe he can get further range by mounting the base of the
>portable phone on a 100 foot tower, and protecting it from the elements.
>His only outlay will be for the tower, which he can get today for about
>500 used, as compared to those high powered amplifier tubes you suggest.
>Get wise man.....

>BJ

 Yes, but would he get 75 miles?

Actually I was being a little bit facetious, (no, a whole lot facetious), and
neither of our suggestions would be legal in the eyes of the FCC.

 A much better solution would be to get a 900-Mhz cordless, which will
inherently have better range and is better in every respect.

 -Naf



From [e-mail] Thu Jan 02 17:17:04 1997
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From: [e-mail] (Mike Kraml)
Newsgroups: rec.radio.amateur.antenna
Subject: Need help matching a Beverage!!!
Date: Mon, 23 Dec 96 10:21:47 GMT
Organization: Internet 1st, Inc
Lines: 11
Message-ID: <59n0m0$[e-mail]>
NNTP-Posting-Host: acs_ws1.i1.net
X-Newsreader: News Xpress 2.0 Beta #2

Hello folks:
   I have run a wavelength beverage for 80 meters.  Its terminated with 2-1k
carbon resisters in parallel, with some very short (4 feet, I know, lame)
ground radials and a 4-foot ground rod.  Anyway, I currently have the antenna
connecting to a short run of coax with the ground of the coax going to an 8
foot ground rod.  I am told however, one should "match" the antenna to the
coax, via some type of matching xformer.  I called my local amateur supply,
they have nothing (6:1 balun, etc).  I am using this antenna only for receive.

 Is there an easy way to match this thing?  Any help would be appreciated,
thanks, Mike... - WQ0N



From [e-mail] Thu Jan 02 17:17:05 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Blocking ham/cb interference on stereo equipment?
Date: Mon, 23 Dec 1996 06:14:41 -0600
Organization: AT&T WorldNet Services
Lines: 15
Message-ID: <[e-mail]>
References: <59jrda$[e-mail]> <[e-mail]>
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Fractenna wrote:
>
> Yes; you can buy such filters at Radio Shack. If its a ham, I would be
> VERY surprised if he or she didn't volunteer to install/make suggestions.
>
> Chip N1IR

While you can make yourself most helpful in showing your neighbor how to
attach the filters or whatever to their tv or stereo, you should not do
the work yourself on any of their equipment.

If something should go wrong with the tv or stero next week that you
"worked" on, you just opened up a whole new can of worms...don't do it.

Assist in any way you can - but keep your hands off their equipment.


From [e-mail] Thu Jan 02 17:17:07 1997
Newsgroups: rec.radio.amateur.antenna
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.net!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!newsfeed.internetmci.com!news.msfc.nasa.gov!in1.nntp.cais.net!NEWS1!not-for-mail
From: Bob Lewis <[e-mail]>
Subject: Re: Help me decide on an HF mobile antenna for cross country trip.
Message-ID: <[e-mail]>
Date: Mon, 23 Dec 1996 08:08:41 -0500
References: <[e-mail]> <32bcb2ad.5611632@news>
Reply-To: [e-mail]
Organization: AA4PB
X-Mailer: Mozilla 3.01 (Win95; U)
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[e-mail] wrote:
>
> On Sat, 21 Dec 1996 18:11:51 -0800, Dan Dillon
> <[e-mail]> wrote:
>
> >So, all of you HF mobile'rs out there.... PLEASE ... suggest an
> >antenna that I can get by January.  I don't know what to get.  I live
> >here in the Los Angeles area, so fortunately there are a few ham stores
> >around here.
> >
>
> there are some mag mounts for  hf antennas, though i dont know how
> well they work
>
> most hf mobilers who are serious go for the texas bug catchers or the
> screwdriver antennas. texas bc's are the best performers, according to
> several articles over the years, but you gotta get outta the car to
> change bands.
>
> the screw driver antennas (i have one) work very well. they are
> slightly below the bc in performance, but you can match them as you
> drive....dont take your eyes off the road though!
>
> there are at least 2 mfrs of these: high sierra and tj antenna. i bot
> the tj antenna and it works reasonably well, but theyve had severe QC
> problems and have required a tremendous amount of time and effort to
> fix...they supplied the parts, i supplied the elbow grease. if i were
> to do it again id probably go for the high sierra instead of tj
>
> the hustlers and hamstick antennas are used by casual folks who value
> ease of installation over performance. tests ive seen indicate they
> are about 10 db down from bug catchers and screwdrivers.
>
> good luck and ill look for you on the air. alot of hf mobilers hang
> out on 14302.5.

All the tests I've seen showing the BC much better than the competetion
were done on 75 meters. I doubt that the difference is as great on 40
meters and probably even closer on 20 meters so the trade-off between
performance and ease if installation depends upon which bands you want
to work. I've had plenty of cross country QSO's on 40 and worked DX on
20 using a hamstick and 100 watts. On the other hand, if you want the
very best performance and aren't concerned with the installation
factors, go for the bug catcher.



From [e-mail] Thu Jan 02 17:17:08 1997
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From: Jacqui <[e-mail]>
Newsgroups: rec.radio.swap,rec.radio.amateur.antenna,rec.radio.shortwave
Subject: KIWA MW Loop Wanted
Date: Mon, 23 Dec 1996 08:18:12 -0500
Organization: Century21
Lines: 3
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Reply-To: [e-mail]
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Xref: news1.epix.net rec.radio.swap:100855 rec.radio.amateur.antenna:33115 rec.radio.shortwave:90974

Still looking for a KIWA MW Loop in nice shape !  If you have one you
would like to turn into $$$ then email [e-mail] with
details about it !


From [e-mail] Thu Jan 02 17:17:11 1997
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From: [e-mail] (Tom Wagner)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: shielding my house
Date: Mon, 23 Dec 1996 13:20:55 GMT
Organization: MindSpring Enterprises, Inc.
Lines: 38
Message-ID: <59m0th$[e-mail]>
References: <01bbbe07$cbf1f1a0$5c203fce@a-greggd> <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: ip10.harford3.ct.pub-ip.psi.net
X-Server-Date: 23 Dec 1996 13:19:45 GMT
X-Newsreader: Forte Free Agent 1.0.82

Ramon Gandia <[e-mail]> wrote:

<snip>

>Not neccesary.  The cell transmitter is fairly low power, 100 watts
>or so max, and the antenna is up on a pole or tower fairly high,
>from 50 to 100 ft or more up from the ground.  This puts your
>kids bedrooms AT LEAST 50 ft from the antenna, maybe more.  Even
>at 50 feet, its harmless.

A minor correction.  I am on my local planning and zoning
commission.  At a presentation for a cell phone antenna,
the company representative told us there was more than one
100 watt transmitter on the one we approved.  If I recall correctly,
there were to be 24.  At a distance, I would think this would
represent a source of 2400 watts if all were on at the same time.

>It might not be harmless if you were to climb the Cell antenna
>tower and perch there day after day....

I thought these frequencies are dangerous
if one is very close to the antenna ( under one foot).  I
thought one's eyes were most susceptible to damage.

A note to the originator of this thread:  the power
of the radiated signal is proportional to  to the square of the
distance between the source and the measurement point.
I.e. the power at 100' is 10,000 times less than it is at one foot.
100/10000 = 10 milliwatts or less power than a cordless phone
at one foot.

Also, the gain of the antenna is such that the signal is
directed horizontally, not towards the ground.  This also
serves to significantly reduce the power levels at the ground.

Tom - N1MM
Tom Wagner - N1MM



From [e-mail] Thu Jan 02 17:17:12 1997
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From: [e-mail] (Mark D. Bulla)
Newsgroups: rec.radio.amateur.antenna
Subject: WTB- Low pwr, 2way, ITFS microwave splitter
Date: 23 Dec 1996 15:14:53 GMT
Organization: University of Maryland, College Park, MD
Lines: 15
Message-ID: <59m7ld$[e-mail]>
NNTP-Posting-Host: rac6.wam.umd.edu
X-Newsreader: TIN [version 1.2 PL2]

Hi all-
        As the subject line states, I'm in need of a 2-way microwave power
divider for the 2.5 GHz frequency range.  I need to split the signal off
the back of the receive dish, so there's not a great deal of power
involved.  I would prefer it to have three N-female connectors, but I'll
take any combination.  I NEED it by the third week in January '97.

If anyone has one of these, please contact me by E-mail.

Thanks!

Mark D. Bulla- Chief Engineer           E-mail: [e-mail]
University of Maryland                  Phone:  [phone]
Instructional Television System         Fax:    [phone]



From [e-mail] Thu Jan 02 17:17:13 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.idt.net!feed1.news.erols.com!worldnet.att.net!cbgw2.lucent.com!nntphub.cb.lucent.com!alice!allegra!ulysses!newshub.netnews.att.com!news
From: "Roger D. Placer" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: 1/2-wave 'Quad'? THANKS
Date: Mon, 23 Dec 1996 11:45:23 -0500
Organization: Lucent Technologies - Bell Labs
Lines: 30
Message-ID: <[e-mail]>
References: <[e-mail]> <59eoa6$[e-mail]>
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CC: [e-mail]

I'd like to thank everyone for their advice and comments.

I did try one thing over the weekend that was a bit odd: I built a
single element half-wave loop for 146 MHz, open at the top, fed at a
corner, and mounted on an old broomstick. What was strange was that my
MFJ analyzer showed an SWR of 2.5:1 at the design frequency, and that
WAS indeed the lowest SWR exhibited by the antenna. In addition, the
resistance was approximately 90-100 ohms. The feedline was a short (5')
length of RG-58/U.

Since the antenna was so small, and the loop made of wire, I unfolded it
into various dipole-like arrangments and managed to get the expected
readings (low SWR, ~50 ohms) the closer to fully horizontal it got. I
really don't know what to think about my original halfwave loop, but
perhaps I should get a hold of some of those books mentioned by you
folks.

I've cc'ed Roy Lewallen on this note: Roy, I have a Macintosh with
SoftWindows (ack), so I should be able to run EZNEC. Please forward
details of your various software products to me at my home email
address: [e-mail]  I'm aware of "MacMININEC," but IMHO it's
ahem, not so great. I'd be willing to try porting your code to MacOS
with a proper GUI and support for the latest system software; please
comment if interested (Mac SW dev. is what I do for a living).
--
==========================================================
Roger D. Placer, KA2Z      Lucent Technologies - Bell Labs
Phone(W) 908.582.3112    Business:       [e-mail]
FAX(W)   908.582.3662    Personal: [e-mail]
==========================================================


From [e-mail] Thu Jan 02 17:17:14 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!portc02.blue.aol.com!audrey01.news.aol.com!not-for-mail
From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: ** Transmitting Loop on Mobile: Why not? **
Date: 23 Dec 1996 16:57:16 GMT
Organization: AOL http://www.aol.com
Lines: 30
Message-ID: <[e-mail]>
References: <59jv05$[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]
X-Newsreader: AOL Offline Reader

In article <59jv05$[e-mail]>, [e-mail](Jeff
Anderson) writes:

>
>Although drawn with an inner and outer shield, imagine it instead as a
>piece of coax with the shield split. The shield goes to ground, and the
>inner loop goes to the load.  Note that the loop is ground independent
>and driving a differential receiver (Rload).
>
>Is this what you meant?  Or is there still a problem with electrical
>isolation of this loop?
>
>- Jeff, WA6AHL

That's what I meant Jeff.

I think somehow this mistakingly got carried over into the assumption that
a "shield" prevents electric induction field coupling.


The only case I can think of where the shield does much at all is when the
loop is floating and feeds a high impedance differential input that is
subject to overload from common mode high impedance excitation.

In the case of the conventional small receiving (and transmitting) loops,
the shield does "virtually" nothing. The folklore the shield is always a
shield has been carried over into Beverage drop wires, snake antennas, and
"Faraday shields" in Beverage transformers.

73 Tom


From [e-mail] Thu Jan 02 17:17:16 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: ** Transmitting Loop on Mobile: Why not? **
Date: 23 Dec 1996 16:57:20 GMT
Organization: AOL http://www.aol.com
Lines: 63
Message-ID: <[e-mail]>
References: <59fnd8$[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]
X-Newsreader: AOL Offline Reader

Hi Bob,
In article <59fnd8$[e-mail]>, [e-mail] (Bob
Bruhns) writes:

>  A vertical antenna tends to beam at low radiation angles.  This is
>OK for DX, but not so good for high-angle local work, even on bands
>which would otherwise support it.

My point was the loop wastes energy by radiating straight up and down. Not
onlt that, the fact that it carries opposing currents on opposite side all
around the preimeter causes radiation resistance to greatly decrease and
forces the antenna to carry very large currents to radiate the same
radiation field power level.

Ampere for ampere, a vertical of the same spatial dimension has much more
intense
far field radiation. My points were:

1.) Why radiate energy straight down, and straight up?

2.) Why radically increase current when you have a fairly good ground
system available with little or no work.

3.) Why use an antenna that has such high currents it requires complex
mechanical construction ( ie welded joints, a special capacitor, a smooth
round large diameter and conductive radiator )?

>  Certainly, on 75 meters the radiation angle of a mobile whip is too
>low for local contacts.  You're relatively weak at a distance, and
>very weak closer in because of the "cone of silence" above the
>vertical.  Ground wave on 75 is pretty much washed out after only
>a couple of miles, except over salt water, so it's not any help except
>for very nearby mobiles.  160 meter groundwave is almost as bad, and
>40 meter groundwave is even worse.

I think the perception the very short vertical is a low angle radiator is
the problem. While the null of a short vertical is straight up and down,
and the primary effect of radiation is along the horizon, the focusing of
pattern is not all that sharp. We are not talking about a long colinear
vertical here, we are talking about a fractional WL antenna.

If we consider the zero or low wave angle signal useless (and it is on
160, 80 and 40), the loop STILL wastes energy there. It simply trades off
energy that would have been broadside and radiates it straight up and
down. So we lose something useless to gain something that is likely just
as useless. Neither the straight overhead or the zero degree angle stuff
will get us many contacts.

With a NVIS radiator we will cover d<200 miles, but on 40 the propagation
at that distance is almost always nil at this point in the sunspot cycle.
With an effective reflection height of 400 miles a 45 degree angle
radiation angle covers 500 statute miles, with an effective reflection
height of 100 miles a 45 degree angle covers 125 statute miles.

The distance on 160 meters where my low dipole beats my 1/4 wl vertical is
about 30 to 150 miles. Below or beyond that distance my vertical easily
wins. A small loop compared to a short vertical would have even less
advantage distance spread.

This isn't to say it is not worth trying a loop, just that the advantages
are not in wave angle or efficiency.

73 Tom


From [e-mail] Thu Jan 02 17:17:17 1997
Path: news1.epix.net!news3.epix.net!uunet!in1.uu.net!152.163.170.17!newstf01.news.aol.com!audrey01.news.aol.com!not-for-mail
From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Verticals and RFI
Date: 23 Dec 1996 16:57:25 GMT
Organization: AOL http://www.aol.com
Lines: 21
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]
X-Newsreader: AOL Offline Reader

In article <[e-mail]>, [e-mail] writes:

>
>Tom
>No No choke the wires not the people.  If choking the wires doesn't work
>than think about the people. Wait until after Christmas.
>Meyyer Christmas and great DX New Year.
>Lou
>KB6FFT
>
>

I'm sorry Lou,

I thought you meant you choked the complainers.. In any event, I should
have known that a good amateur would wait until after Christmas to choke
the complainers. I think that is in the amateur's code in the front of the
Handbook. :-)

Have a good Christmas everyone.
Tom


From [e-mail] Thu Jan 02 17:17:18 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!news.kei.com!newsfeed.internetmci.com!news.webspan.net!www.nntp.primenet.com!nntp.primenet.com!newsxfer2.itd.umich.edu!uunet!in1.uu.net!199.250.196.4!News.MO.NET!usenet
From: Lanny Rathert <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Phasing two Butternut HF2V
Date: Mon, 23 Dec 1996 10:40:28 -0800
Organization: -=MO.NET=- MVP-Net, Inc's Missouri Operations
Lines: 3
Message-ID: <[e-mail]>
Reply-To: [e-mail]
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Has anyone sucessfully used two HF2V Verticals phased in the broadside
configuation? I have abt 1/4 wavelength for spacing.Tnx for any help.73
Lanny N0AJZ


From [e-mail] Thu Jan 02 17:17:20 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.misc,alt.engineering.electrical
Subject: Re: Grounding system?
Date: 23 Dec 1996 20:33:01 GMT
Organization: DigiPhone Corporation, Bryan/College Station Texas 409-693-8885
Lines: 54
Message-ID: <59mq9t$[e-mail]>
References: <[e-mail]> <5942d3$[e-mail]> <[e-mail]> <59jotd$[e-mail]> <[e-mail]>
Reply-To: [e-mail]
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Xref: news1.epix.net rec.radio.amateur.antenna:33125 rec.radio.amateur.misc:121514 alt.engineering.electrical:10448

In <[e-mail]>, [e-mail] (Gary Coffma
n) writes:
>In article <59jotd$[e-mail]> [e-mail] writes:
>>In <[e-mail]>, [e-mail] (Gary Coff
man) writes:
>[snip]

>Yeah, I'm aware of that. However that effect is mostly of interest
>when you are monitoring a distant stroke. Its relevance to what
>happens to a struck tower or other structure is about equivalent
>to worrying about what frequency the exciter was on when the PA
>arced over. In other words, the frequencies the tower structure
>sees are completely dominated by the pulse shape of the proximate
>impulse. That lasts about 2 uS, so oscillations further up the
>bolt don't have a chance to propagate to the tower in any event.

Which is EXACTLY what we were doing when I helped build the first
sferics strike monitor device at Texas A&M back in about '61 or '62,
as I have forgotten the exact year without looking it up...

>Ah, understood. I don't believe such bonding does any harm, but it
>doesn't do much good on a short tower either. Rigid line gets tied...

>I haven't any evidence that causes problems.
>
>Gary

Nor I.  The entire WTAW-FM 1-1/2" Andrew hard line was bonded to the
main shunt fed tower going up tower accordingly.

I did that job.  I didn't do the one up at our sister station in Lufkin.  That

one was hit three times on the power lines.  Twice the station was totally
destroyed by power line hits that went into the facility.  The insurance
company paid off twice on the equipment re-installation.

However, just like a beer joint that burns in Texas, the third time it goes up

in flames the Liquor Control Board will *NOT* renew the license at the same
physical site.  I learned that from a girl friend of mine whose uncle ran a
dance hall in Cut and Shoot, Texas..

    <Huge temperance engine grin widely from ear to ear>

The third time Dr. Zeus came to visit the Lufkin station, it actually set fire

to the place as well and burned it to the ground.

Insurance company refused to pay, so I am told, and it went dark.

It was a country site installation..

    <Huge temperance engine grin from ear to ear>

//-----------------------------
Mike - W5WQN
[e-mail]
[e-mail]



From [e-mail] Thu Jan 02 17:17:21 1997
Path: news1.epix.net!news3.epix.net!uunet!in1.uu.net!192.89.123.24!nntp.inet.fi!news.funet.fi!news.helsinki.fi!karhu.Helsinki.FI!mxjokine
From: [e-mail] (Matti A Jokinen)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Long wire antenna
Date: 23 Dec 1996 20:34:45 GMT
Organization: University of Helsinki
Lines: 6
Message-ID: <59mqd5$[e-mail]>
References: <58t7ft$[e-mail]> <[e-mail]>
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Barry Anderson ([e-mail]) wrote:
:     My experiance with long wire antennae is NOT to feed it with coax.

This just is what the manufacturer of my longwire coupler (SG230) says. The
antenna begins right from the coupler outlet.
-Matti


From [e-mail] Thu Jan 02 17:17:22 1997
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From: "David A. Cooley" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.homebrew,triangle.radio,ipass.ham-radio
Subject: triplexer schematic needed
Date: Mon, 23 Dec 1996 16:29:22 -0500
Organization: IPass.net
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Message-ID: <[e-mail]>
Reply-To: [e-mail]
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Xref: news1.epix.net rec.radio.amateur.antenna:33118 rec.radio.amateur.homebrew:22316 triangle.radio:2313

Looking to build a triplexer to feed 3 antennas with one cable... 2m,
223.5mhz and 440 mhz.  Any info appreciated.
Tnx,
Dave

--
========================================================================
David Cooley N5XMT                  Packet: N5XMT@W4RAL.#RTP.NC.USA.NOAM
Internet: [e-mail]    And Web: http://www.ipass.net/~cooldave/
Sponges grow in the ocean... Wonder how deep it would be if they didn't!
========================================================================


From [e-mail] Thu Jan 02 17:17:22 1997
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From: [e-mail] (Kraig Kolar)
Newsgroups: rec.radio.amateur.antenna
Subject: powerful VHF/UHF antenna
Date: 23 Dec 1996 22:59:49 GMT
Organization: Ripco Communications Inc.
Lines: 10
Message-ID: <59n2t5$1ff$[e-mail]>
NNTP-Posting-Host: golden.ripco.com
X-Newsreader: TIN [version 1.2 PL2]

I want to buy a very powerful VHF/UHF tv antenna.  The best I've found so far
with my limited knowledge is radio shack's VU-210XR with a range of 210 miles
for VHF and 135 miles for UHF.  It has 58 elements and a boom length of 190
inches and it cost 130 dollars.  Can anyone tell me if this would be worth the

money or is something else better?

thanks,
Kraig
[e-mail]



From [e-mail] Thu Jan 02 17:17:23 1997
From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Help me decide on an HF mobile antenna for cross country trip.
Date: Mon, 23 Dec 1996 23:16:20 GMT
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
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Hi happy holidays,,
For my own HF use I usa an OutBacker Perth, it's only good for
150-200Watts and kinda of a pain to change Ive had great work using it
with my FT-890 on the CW portions of the band, It does as good if not
better that my G5RV  flat top at 35ft. I have ran the coax into the
house and compaired the differance and was suprised how well the Perth
works. 73's de [e-mail]



From [e-mail] Thu Jan 02 17:17:24 1997
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From: [e-mail] (Jan PA0LBN)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Anyone try 1.5 KW into TA 33 Junior beam?
Date: Mon, 23 Dec 1996 23:19:42
Organization: none
Lines: 20
Message-ID: <[e-mail]>
References: <[e-mail]>
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In article <[e-mail]>
 "John T. Young" <[e-mail]> writes:

>Wondering if anyone has tried loading up a Mosely TA33 Jr. or TA33 Jr WARC
>(this is what I've got) to 1.5 kilowatts PEP SSB. I know they are rated
>for 1.2 kw on ssb and 500 watts on cw, but I'm wondering if there is
>enough tolerance +/- for occaisional full legal output on ssb. I called
>Mosely and they said there is some tolerance but that the amount is
>unpublished and that one should stick to the specs (the expected
>response). Just curious if anyone has tried it. I'm thinking of upgrading
>my amplifier and I'm just anticipating the temptation! I also realize that
>going from 500 watts out (my present amp) to 1.2 or 1.5 kw will not make a
>tremendous difference, but I'm still curious.....many thanks for your
>input. 73 and best of the season to you all. John, K7JY.

Once I saw a burned out trap of a Mosley beam which had been on the roof
for several years.  The coil looked oxidized and there were debris of
spiders in it.
So If your beam is up for a couple of years allready, I would't try.

73, Jan


From [e-mail] Thu Jan 02 17:17:25 1997
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From: [e-mail] (Barry Kutner)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Need help matching a Beverage!!!
Date: Tue, 24 Dec 1996 00:21:08 GMT
Organization: Voicenet - Internet Access - [phone]
Lines: 18
Message-ID: <59n74s$[e-mail]>
References: <59n0m0$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: doyl158-pri.voicenet.com
X-Newsreader: Forte Free Agent 1.0.82

[e-mail] (Mike Kraml) wrote:

>Hello folks:
>   I have run a wavelength beverage for 80 meters.  Its terminated with 2-1k
>carbon resisters in parallel, with some very short (4 feet, I know, lame)
>ground radials and a 4-foot ground rod.  Anyway, I currently have the antenna

>connecting to a short run of coax with the ground of the coax going to an 8
>foot ground rod.  I am told however, one should "match" the antenna to the
>coax, via some type of matching xformer.  I called my local amateur supply,
>they have nothing (6:1 balun, etc).  I am using this antenna only for receive
.
> Is there an easy way to match this thing?  Any help would be appreciated,
>thanks, Mike... - WQ0N

Mike - A 9:1 balun is more like it. One is avaible from I.C.E.
(800-ICE-COMM). Also if you look in ON4UN's book, he explains how to
wind your own. 73 Barry W2UP




From [e-mail] Thu Jan 02 17:17:26 1997
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From: [e-mail] (Roland Stiner)
Date: 24 Dec 96 01:15:00 GMT
Newsgroups: rec.radio.amateur.antenna
Message-ID: <[e-mail]>
X-FTN-To: [e-mail]
Organization: MAG Systems, Inc/TFP BBS
To: [e-mail]
Subject: Re: MFJ259 antenna analyz
Lines: 19


CS>From: Costas Spanos <[e-mail]>

CS>The 259 is great, but I did find out one thing using it: Try to do so
  >when the band is quiet. The 259 sends a small signal to the antenna and
  >is looking for reflected power. This signal level is very small, and
  >easily comparable with strong signals that your antenna might be
  >receiving at the time. Since the front end of the 259 is not very
  >selective, strong signals in nearby frequencies might also influence
  >the measurements.

You would do better with the 209B (or 204B can't remember the
number right now) resistance meter. I found that to work much better and
be more useful.

---
   OLX 1.53   PRIVATE REPLIES?  TO E-MAIL ADDRESS: [e-mail]

--


From [e-mail] Thu Jan 02 17:17:27 1997
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From: [e-mail] (Roland Stiner)
Date: 24 Dec 96 01:15:00 GMT
Newsgroups: rec.radio.amateur.antenna
Message-ID: <[e-mail]>
X-FTN-To: [e-mail]
Organization: MAG Systems, Inc/TFP BBS
To: [e-mail]
Subject: Veritcal vs. G5RV ???
Lines: 18


H>I'm aware that the vertical offers a lower angle of radiation which is
 >ideal for DXing however  I'm leaning towards the G5RV since I'm
 >reluctant to the thought of greatly reducing  the usuable space in the
 >backyard once the vertical is installed.
 >I'm not much of a DX chaser anyway...my HF operation is more casual.
 >I just wonder after all considered if the G5RV would be a  compromise
 >compared to the vertical.

I do not have space for a full size G5RV so I have to use the vertical.
But, if I had the choice, I would go for the G5RV (which I use when I'm
in DU.)  Performs much better and it has no adjustments.  Just solder it
up and away you go.

---
   OLX 1.53   PRIVATE REPLIES?  TO E-MAIL ADDRESS: [e-mail]

--


From [e-mail] Thu Jan 02 17:17:28 1997
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From: [e-mail] (Occolowitz John)
Newsgroups: rec.radio.amateur.antenna
Subject: Anybody work on utility poles in Indianapolis?
Date: Tue, 24 Dec 1996 01:34:27 GMT
Organization: IndyNet - Indys Internet Gateway ([e-mail])
Lines: 11
Message-ID: <59n120$[e-mail]>
NNTP-Posting-Host: ip97.slip.indy.net
X-Newsreader: Forte Free Agent 1.0.82

I have 60 ft. wooden utility pole with Ham IV rotor and two stacked 11
elem. yagis at top for 2 meters. They were placed there many years
back by a man who worked for the utility company. He no longer does
this work.
I'd like to replace them with one or possibly two 16 elem. yagis. Does
anybody know if anyone still does this kind of work?
Looked into using bucket truck but most top out at 55 ft.

Thanks. John KB9MIE.




From [e-mail] Thu Jan 02 17:17:29 1997
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From: [e-mail] (Mary-Frances R. Bartels)
Newsgroups: rec.radio.amateur.antenna
Subject: Six Meter Antenna Plans
Date: 24 Dec 96 02:06:38 GMT
Organization: ucsd usenet gateway
Lines: 22
Message-ID: <[e-mail]>
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]

   I know there have been a few requests here for plans for six meter
antennas and I feel somewhat uncomfortable asking for them also.
Probably most folks that read this are more organised than I am.
Whenever I see something I like on the Usenet groups I write myself a
note (I get the groups through a digest and don't want to print out the
whole thing).  Sometimes these notes are misplaced.  One of my notes to
myself was recently lost, thus, my request for the plans here.
   I seem to remember than someone posted a URL that pointed to a club in
the UK that had six meter antenna plans.  I looked for that site as well
as the original post on Alta Vista to no avail.  Could anyone that
remembers the post let me know what that URL was?  Any other pointers on
building six meter antennas would also be appreciated.  This will be my
first real "project", so I'm looking for something that will be usable
and a confidence builder at the same time.
   Thanks for reading this and have a very merry Christmas and a happy
New Year!
                                                          73,
Mary-Frances R. Bartels                         (((#)))     ^     ^
Amateur Radio Callsign: KI0DZ     Denver, CO       |         ^ - ^
"Owner and Operator" of Rudolph's Rabbit Ranch  -------      (o o)
Independent Rep. of Watkins products            |ooOoo|    >{  |  }<
[phone]   [e-mail]                 -------        "      )*


From [e-mail] Thu Jan 02 17:17:30 1997
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From: Jerry Decker N5RV <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.equipment
Subject: N5RV's Mobile HF Home Page
Date: Mon, 23 Dec 1996 20:18:52 -0600
Organization: Texas Metronet Inc.
Lines: 18
Message-ID: <[e-mail]>
Reply-To: [e-mail]
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Xref: news1.epix.net rec.radio.amateur.antenna:33141 rec.radio.amateur.equipment:44954

Attention All Mobile HF Ops!

You now have a home page at http://www.metronet.com/~jdecker/

The info is a little scares at the moment but what is there is very
informative. If you would like to share some of your experiences, please
email it to [e-mail]. I would be happy to post it to your
credit.

I was thinking of adding a Mobile DX section. Tell me what you think.

73 de Jerry N5RV
--
============================================================
Jerry Decker N5RV (ex WR5V)
Mac User, Novice Programming, Ham Radio
The opinions voiced here are my own and not of Motorola Inc.
http://www.metronet.com/~jdecker/


From [e-mail] Thu Jan 02 17:17:31 1997
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From: [e-mail] (CDN)
Newsgroups: rec.radio.amateur.antenna
Subject: GAP Voyager DX
Date: Tue, 24 Dec 1996 02:40:01 GMT
Organization: Systems Solutions Inc. (Arizona's Internet Provider)
Lines: 15
Message-ID: <[e-mail]>
Reply-To: [e-mail]
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I am seriously considering one of these for a new installation.  Any
comments/suggestions/horror stories/high praise????


My thanks and to all, a very merry holiday season and a prosperous new
year.


CDN


                  C. Dean Norris, K7NO
               e-mail to [e-mail]
       Due to a lack of qualified trumpet players-
    The end of the world has been postponed two weeks


From [e-mail] Thu Jan 02 17:17:32 1997
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From: [e-mail] (Mike Kraml)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Need help matching a Beverage!!!
Date: Tue, 24 Dec 96 03:04:57 GMT
Organization: Internet 1st, Inc
Lines: 6
Message-ID: <59nh1v$[e-mail]>
References: <59n0m0$[e-mail]> <59n74s$[e-mail]>
NNTP-Posting-Host: acs_ws3.i1.net
X-Newsreader: News Xpress 2.0 Beta #2

In article <59n74s$[e-mail]>, [e-mail] wrote:
>Mike - A 9:1 balun is more like it. One is avaible from I.C.E.
>(800-ICE-COMM). Also if you look in ON4UN's book, he explains how to
>wind your own. 73 Barry W2UP
  I can not find that book anywhere in St. Louis.  Is there any way you can
summerize and fill me in on what he says?  Thanks, 73, Mike...


From [e-mail] Thu Jan 02 17:17:32 1997
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From: [e-mail] (Anikan)
Newsgroups: rec.radio.amateur.antenna
Subject: Passive Repeater???
Date: 24 Dec 96 03:20:38 GMT
Organization: ucsd usenet gateway
Lines: 10
Message-ID: <[e-mail]>
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]


Hello all, I am looking for information on a Passive Repeater. As far as i
understand it, it is notheing more than two antennas hooked up by a
certain length of feedline. No gain, but one would be useful to get a
signal into an area (or over an obstacle) without the regular equipment. I
would like to set one up to allow regular repeater access from a dead spot
in town.  Any help would be much appreciated.


larry nixon VE7LFN


From [e-mail] Thu Jan 02 17:17:34 1997
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From: [e-mail] (Bob Bruhns)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: ** Transmitting Loop on Mobile: Why not? **
Date: 24 Dec 1996 03:38:38 GMT
Organization: LI Net (Long Island Network)
Lines: 30
Message-ID: <59nj7u$[e-mail]>
References: <59fnd8$[e-mail]> <[e-mail]>
NNTP-Posting-Host: linet01.li.net
X-Newsreader: TIN [version 1.2 PL2]

  Hi, Tom.  I guess it's just a matter of where you want to reach.
My own preference is relatively local work (zero to 300 miles) on 75.
For a lot of hams, this is where the contacts are.  For this work,
power radiated roughly straight up is not wasted, in fact it is being
aimed in the only direction which will deliver usable signal to
receivers from 10 to 150 miles out.  Any disadvantage a loop might have
beyond much this range is an acceptable compromise to achieve improved
local coverage.

  A short vertical whip has an approximately cosine vertical radiation
pattern, which has a big hole in the upward direction.  But there are
tricks that can be used to get better high-angle radiation from a
vehicular whip antenna.  Whips can produce improved high-angle
performance if they are tilted out sideways away from the vehicle.
This gives the vehicle-antenna system a significant horizontal
component, producing much improved skywave.  However, this tends to
produce a null in the direction where the antenna whip is pointing.

  Bob Bruhns, WA3WDR, [e-mail]


[e-mail] had written:
: My point was the loop wastes energy by radiating straight up and down.
<>
: Ampere for ampere, a vertical of the same spatial dimension has much
: more intense far field radiation.
<>
: Neither the straight overhead or the zero degree angle stuff will get
: us many contacts.



From [e-mail] Thu Jan 02 17:17:35 1997
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From: John Fleenor <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Build 2 Meter Quad
Date: Mon, 23 Dec 1996 20:18:42 -0800
Organization: CyberRamp.net, Dallas, TX [phone]/[phone] for info
Lines: 1
Message-ID: <[e-mail]>
NNTP-Posting-Host: dal-tsa2-p1-51.cyberramp.net
Mime-Version: 1.0
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http://www.cyberramp.net/~johnf


From [e-mail] Thu Jan 02 17:17:36 1997
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From: [e-mail] (KC5WCP)
Newsgroups: rec.radio.amateur.antenna
Subject: HELP! 2m conversion
Date: Tue, 24 Dec 1996 05:17:36 GMT
Organization: Datasync Internet
Lines: 12
Message-ID: <59nsn3$[e-mail]>
NNTP-Posting-Host: osp30.datasync.com
X-Newsreader: Forte Free Agent 1.0.82

I have a Cushcraft a147 22 (2 eleven element beams). came as a
verticle stacking kit. I want to convert it for horizontal stacking.
One over the other as opposed to side by side like the verticle kit.
Can I use the same harness, same spacing?
Basically can I assemble the kit like it came and turn it on it's
side, mount it to the mast and it would work fine or do I need to make
some adjustments?

Many thanks and merry christmas.
KC5WCP
Eric



From [e-mail] Thu Jan 02 17:17:37 1997
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From: "Christopher (Chris) W. Boone" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Passive Repeater???
Date: Mon, 23 Dec 1996 21:35:36 -0800
Organization: ABC Radio Network Engineering - Dallas
Lines: 33
Message-ID: <[e-mail]>
References: <[e-mail]>
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Mime-Version: 1.0
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Anikan wrote:
>
> Hello all, I am looking for information on a Passive Repeater. As far as i
> understand it, it is notheing more than two antennas hooked up by a
> certain length of feedline. No gain, but one would be useful to get a
> signal into an area (or over an obstacle) without the regular equipment. I
> would like to set one up to allow regular repeater access from a dead spot
> in town.  Any help would be much appreciated.
>
> larry nixon VE7LFN

Passive repeaters are used in some cases in commercial systems BUT the
coverage is not that much...usually less than 100ft from the antenna..
in microwave, it can be used as a passive reflector to go over or around
an obstacle like a mountain etc....but m/w uses high gain antennas and
the signal is highly directive on all ends....with a VHF/UHF fm rptr,
this is not the case....the user has a low gain antenna, low erp, non
directional, and the rptr itself is usually omni with a low gain (6db or
so) compared to microwave systems with 40+ db on dishes....

The antennas in a fm passive rptr need to be HIGHLY directional (IE High
gain!) and the range for the user on the low side will not be that
great...Even a bidirectional rptr (using on channel amps, filters and TWO
duplexers) does not give good coverage away from the user side of the
system....

If you have a dead spot in town, look at how far your coverage in that
dead zone needs to be....less than 100ft, a passive rptr MAY work..
if more, look at a satelite rcvr with a voter at the main rptr...or a sat
rcvr with a TIGHT squelch or different PL.

Chris
WB5ITT


From [e-mail] Thu Jan 02 17:17:38 1997
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From: "Christopher (Chris) W. Boone" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.homebrew,triangle.radio,ipass.ham-radio
Subject: Re: triplexer schematic needed
Date: Mon, 23 Dec 1996 21:42:06 -0800
Organization: ABC Radio Network Engineering - Dallas
Lines: 47
Message-ID: <[e-mail]>
References: <[e-mail]>
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Xref: news1.epix.net rec.radio.amateur.antenna:33133 rec.radio.amateur.homebrew:22328 triangle.radio:2314

Comet and Diamond make units such as this for 80 bucks....

I have one and it works ok....

The basic premise is:

UHF ---------------(high pass filter with ---------------
                    cut off at 320 Mhz)                 |
                                                        |
                                                        ----ANT
                                                        |
                                                        |
                                                        |
                         (low pass filter with ---------
                           cut off at 320Mhz)
                                |
                                |
                                |
                ------------------------------
                |                            |
       (highpass filter with            (lowpass filter with
        cutoff of 170Mhz)                cutoff of 170Mhz)
               |                             |
             220 Mhz port                  HF->2m port


Thats about it......Not much different than a VHF/UHF diplexer but with
an extra diplexer (144/220) built in

73
Chris
WB5ITT

(dont forget GOOD interstage shielding for max isolation)

David A. Cooley wrote:
>
> Looking to build a triplexer to feed 3 antennas with one cable... 2m,
> 223.5mhz and 440 mhz.  Any info appreciated.
> Tnx,
> Dave
>
> --
> ========================================================================> Da
vid Cooley N5XMT                  Packet: N5XMT@W4RAL.#RTP.NC.USA.NOAM
> Internet: [e-mail]    And Web: http://www.ipass.net/~cooldave/
> Sponges grow in the ocean... Wonder how deep it would be if they didn't!
> ========================================================================


From [e-mail] Thu Jan 02 17:17:39 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.misc,alt.engineering.electrical
Subject: Re: Grounding system?
Date: 24 Dec 1996 07:07:10 GMT
Organization: DigiPhone Corporation, Bryan/College Station Texas 409-693-8885
Lines: 16
Message-ID: <59nveu$[e-mail]>
References: <[e-mail]> <[e-mail]> <[e-mail]> <[e-mail]> <5942d3$[e-mail]> <wtshaw-1812960149220001@207.17.188.151> <[e-mail]> <[e-mail]> <[e-mail]>
Reply-To: [e-mail]
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Xref: news1.epix.net rec.radio.amateur.antenna:33137 rec.radio.amateur.misc:121535 alt.engineering.electrical:10451

In <[e-mail]>, "William E. Sabin" <sabinw@crp
l.cedar-rapids.lib.ia.us> writes:
>J. Fred Riley wrote:
>A "coordinated" system that *isolates* the equipment from lightning
>damage all across the frequency spectrum must be the right approach. No
>one single "fix" is enough. The things that work at low frequency are no
>good at the higher frequencies, and vice versa.
>
>Bill W0IYH

That was well said too, Bill.  Brute force filter concept?  <Smile>

//-----------------------------
Mike - W5WQN
[e-mail]
[e-mail]



From [e-mail] Thu Jan 02 17:17:41 1997
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From: [e-mail] (KC5WCP)
Newsgroups: rec.ham-radio,rec.radio.amateur,rec.radio.amateur.antenna,rec.radio.amateur.equipment,rec.radio.amateur.misc
Subject: Re: Gary Coughman SUPPORTS HAZING !!!
Date: Tue, 24 Dec 1996 07:18:43 GMT
Organization: Datasync Internet
Lines: 56
Message-ID: <59o3q4$[e-mail]>
References: <01bbeb67$8fcce7b0$0fb919ce@davidh> <[e-mail]> <[e-mail]> <59fhd5$[e-mail]>
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Xref: news1.epix.net rec.radio.amateur.antenna:33143 rec.radio.amateur.equipment:44956 rec.radio.amateur.misc:121551

[e-mail] (Jim Kehler) wrote:

>[e-mail] (Gary Coffman) wrote:

>>Now my tower has almost a full section buried. In other words the
>>hole is 10 feet deep and has 2 feet of aggregate in the bottom. I
>>dug it by hand with a posthole digger. Not with an auger, with a
>>real posthole digger. I started the hole with the regular handles,
>>and changed to longer handles as the hole got deeper. It took two
>>leisurely mornings to finish (too hot to dig in the afternoon).

>>Gary
>>--
>>Gary Coffman KE4ZV          |    You make it,     | Due to provider problems

>>Destructive Testing Systems |    we break it.     | with previous uucp addre
sses
>>534 Shannon Way             |    Guaranteed!      | Email to [e-mail]
>>Lawrenceville, GA 30244     |                     |

>Gee, Gary, you just blew your image. We all thought you were Hi Tek.

>'Real hams do it on the giga hertz at 56k baud, and real hams dig tower holes
>with a post hole digger'.  I don't know, something just doesn't seem to fit.

>Personally I think post hole diggers are an obsolete, antiquated way to dig a
>hole that should be banned.   Why should today's modern digital hams be
>forced to have a post hole digger jambed down their throat just because they
>want to have a tower ?  No commercial outfit uses post hole diggers anymore.
>They all have gas powered augers, and big trucks with giant drill bits.  Why
>should hams be subject to using silly, outdated, antiquated tools for digging
>holes when nobody else is using them ?  To suggest a ham dig a tower hole
>with a post hole digger is nothing but HAZING ! Just because YOU like having
>blisters on YOUR hands doesn't mean ALL of us have to like it.  How about peo
ple
>with disabilities ?  Do you expect disabled people to spend two days in the y
ard
>with a post hole digger just because YOU did it ? What about people who live
in
>places where the dirt is REALLY HARD ?  Should they be kept out of ham radio
>just because of your silly post hole digger hazing ritual ?

>I think not.  I think people should be able to just pick up the phone, call o
ne
>of those guys with the big trucks with the giant drill bits, and let THEM com
e
>over and dig the hole for the tower.   Post hole diggers are keeping a lot of
>quality, qualified people out of ham radio, and it's time this hazing ritual
>come to an END !!!  I am going to write to the ARRL and WARC 99 and tell them
 I
>think it's about time to get rid of post hole diggers for ever !!!

>73, Jim KH2D

Hey Jim,

I saw nothing in the quoted text that suggested he wanted a posthole
digger REQUIREMENT. Unlike the PRO-CODERS......








From [e-mail] Thu Jan 02 17:17:42 1997
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!usenet.eel.ufl.edu!www.nntp.primenet.com!nntp.primenet.com!news.mindspring.com!mindspring!news.bbnplanet.com!cpk-news-hub1.bbnplanet.com!newsfeed.internetmci.com!mackrel.fishnet.net!usenet
From: Mike <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: powerful VHF/UHF antenna
Date: Mon, 23 Dec 1996 23:46:54 -0800
Organization: FNS
Lines: 22
Message-ID: <[e-mail]>
References: <59n2t5$1ff$[e-mail]>
NNTP-Posting-Host: port014.scv.fishnet.net
Mime-Version: 1.0
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To: Kraig Kolar <[e-mail]>

Kraig Kolar wrote:
>
> I want to buy a very powerful VHF/UHF tv antenna.  The best I've found so fa
r
> with my limited knowledge is radio shack's VU-210XR with a range of 210 mile
s
> for VHF and 135 miles for UHF.  It has 58 elements and a boom length of 190
> inches and it cost 130 dollars.  Can anyone tell me if this would be worth t
he
> money or is something else better?
>
> thanks,
> Kraig
> [e-mail]


Kraig,
I have installed Radio shack, Winegard and the antenna avail at home
centers. I found it had to believe there would be a difference, but
there is a big one. The Winegard while more dollars out performs the
others I put in for customers. I always used the Winegard CS-8200
uhf/vhf model. It is 177" long 110" wide and does a great job for
distant stations. You might consider a preamp also.
Good Luck
Mike K6YPB


From [e-mail] Thu Jan 02 17:17:43 1997
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From: afud <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: What is a coupled circuit?
Date: 24 Dec 1996 08:44:06 GMT
Organization: AFUD
Lines: 6
Message-ID: <59o54m$[e-mail]>
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If you have an antenna tuner that has Forward Power reading at the same time t
hat
you have a Reflected Power reading, is this called a coupled circuit?
Thanks in advance for your help.
Please post answer/comments/help to newsgroup.
CB 235 Godfather



From [e-mail] Thu Jan 02 17:17:44 1997
Newsgroups: rec.radio.amateur.antenna
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!zombie.ncsc.mil!newsgate.duke.edu!agate!howland.erols.net!newsfeed.internetmci.com!in2.uu.net!192.107.41.5!iglou!iglou.com!n4lq
From: [e-mail] (Steve Ellington)
Subject: Re: Veritcal vs. G5RV ???
X-Nntp-Posting-Host: iglou1
X-Nntp-Posting-User: n4lq
Message-ID: <[e-mail]>
Sender: [e-mail] (News Administrator)
Organization: IgLou Internet Services (1-800-436-4456)
X-Newsreader: TIN [version 1.2 PL2]
References: <[e-mail]>
Date: Tue, 24 Dec 1996 13:03:09 GMT
Lines: 8

G
5
R
V


--
Steve Ellington [e-mail]  Louisville, Ky


From [e-mail] Thu Jan 02 17:17:45 1997
Newsgroups: rec.radio.amateur.antenna
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!news.sprintlink.net!news-peer.sprintlink.net!mv!wd1v.mv.com!user
From: [e-mail] (JS)
Subject: Ham Radio FAQ on WWW or Text File
Organization: MV Communications, Inc.
Message-ID: <[e-mail]>
X-Nntp-Posting-Host: wd1v.mv.com
Date: Tue, 24 Dec 1996 13:47:36 GMT
Lines: 41

                      Announcing NEW
                       Ham Radio.FAQ

This is the second generation of the original file that was
a regular USENET posting entitled

     "rec.radio.amateur.misc Frequently Asked Questions"

The NEW Ham Radio.FAQ is a HyperText document that is on the
WWW and it contains 3 chapters plus hundreds of LINKS to radio
related sites!

     1 - Introduction to the Ham Radio.FAQ
     2 - Amateur Radio Organizations, Services, and Data Sources
     3 - Amateur Radio Advanced and Technical Questions

Please provide a copy of the Ham Radio.FAQ to any new or
soon-to-be Hams that you know or share with them the URL to this
site:

               http://www.mv.com/ipusers/wd1v

Send me an EMAIL <or packet with your Email address> if you want the
FAQ text file sent to you as an attached <120 K> file with the words
"HAM FAQ" on the subject line.

Send me a formatted disk with SASE disk mailer if you want the
FAQ text file sent to you on disk. PC or Mac are fine.


73,


                John D. Seney |_|_|_|_| [e-mail]
            144 Pepperidge Dr |_|   |_| page [e-mail]
    Manchester, NH 03103-6150 |_|_ _|_| [e-mail]
      voice mail 603.533.3472 | | | | | fax [phone]

            Digital Scope.FAQ + Amateur Radio.FAQ + Macnet

                   http://www.mv.com/ipusers/wd1v


From [e-mail] Thu Jan 02 17:17:46 1997
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From: [e-mail] (DHoxworth)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: MFJ259 antenna analyzer
Date: 24 Dec 1996 14:46:52 GMT
Organization: AOL http://www.aol.com
Lines: 5
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

Just a note to say I have been using the new rechargable alkaline
batteries in mine and they seem to work well... I have not had any
problems with the battery holders.
Yours Truely,
Dave Hoxworth, AA8KJ


From [e-mail] Thu Jan 02 17:17:47 1997
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From: "David A. Cooley" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.homebrew,triangle.radio,ipass.ham-radio
Subject: Re: triplexer schematic needed
Date: Tue, 24 Dec 1996 10:30:18 -0500
Organization: IPass.net
Lines: 49
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: customs532.ipass.net
Mime-Version: 1.0
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Content-Transfer-Encoding: 7bit
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To: "Christopher (Chris) W. Boone" <[e-mail]>
Xref: news1.epix.net rec.radio.amateur.antenna:33149 rec.radio.amateur.homebrew:22342 triangle.radio:2315

I guess I could just reverse the conn's for what I need... One coax
leaving the shack (one rig used at a time) but 3 antennas on one boom
Thanks,
Dave



Christopher (Chris) W. Boone wrote:
>
> Comet and Diamond make units such as this for 80 bucks....
>
> I have one and it works ok....
>
> The basic premise is:
>
> UHF ---------------(high pass filter with ---------------
>                     cut off at 320 Mhz)                 |
>                                                         |
>                                                         ----ANT
>                                                         |
>                                                         |
>                                                         |
>                          (low pass filter with ---------
>                            cut off at 320Mhz)
>                                 |
>                                 |
>                                 |
>                 ------------------------------
>                 |                            |
>        (highpass filter with            (lowpass filter with
>         cutoff of 170Mhz)                cutoff of 170Mhz)
>                |                             |
>              220 Mhz port                  HF->2m port
>
> Thats about it......Not much different than a VHF/UHF diplexer but with
> an extra diplexer (144/220) built in
>
> 73
> Chris
> WB5ITT
>
> (dont forget GOOD interstage shielding for max isolation)

--
========================================================================
David Cooley N5XMT                  Packet: N5XMT@W4RAL.#RTP.NC.USA.NOAM
Internet: [e-mail]    And Web: http://www.ipass.net/~cooldave/
Sponges grow in the ocean... Wonder how deep it would be if they didn't!
========================================================================


From [e-mail] Thu Jan 02 17:17:48 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!news.sprintlink.net!news-peer.sprintlink.net!news.sprintlink.net!news-hub.sprintlink.net!news.sprintlink.net!news-fw-12.sprintlink.net!buffnet2.buffnet.net!usenet
From: [e-mail] ([e-mail])
Newsgroups: rec.radio.amateur.antenna
Subject: Re: ARRL antenna handbook - 6M yagi
Date: Tue, 24 Dec 1996 16:02:00 GMT
Organization: BuffNET
Lines: 31
Message-ID: <59ounv$[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: fppp5.buffnet.net
X-Newsreader: Forte Free Agent 1.0.82

Philip Peake <[e-mail]> wrote:

>I recently bought a copy of the ARRL Antenna Handbook, and was
>thinking of building a 6M yagi.

>There is a page (just one page ...) on optimised 6M yagis.
>But I suspect that there is a diagram (or two) and maybe some
>text missing.

>The tables giving spacings and elementy lengths are very unclear.

>Has anyone built these designs ?

Yes .. I have.
 I do not know what the  rev of the handbook you purchased is mine is
about two years old. The cover is blue.

The antenna I built was a three element six foot boom job. It works
quite well. Total cost was less than what you paid for the handbook.
About $20. If you do build one don't expect a 1:1 VSWR across the
band. Its more like 1.3 at best.

If time allows I plan to do for a four element version.

If you have specific problems I would be glad to address them.


Good Luck

   --  db --



From [e-mail] Thu Jan 02 17:17:49 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: What is a coupled circuit?
Date: 24 Dec 1996 16:13:38 GMT
Organization: DigiPhone Corporation, Bryan/College Station Texas 409-693-8885
Lines: 44
Message-ID: <59ovfi$[e-mail]>
References: <59o54m$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: usr16s8.myriad.net
X-Newsreader: IBM NewsReader/2 2.0

In <59o54m$[e-mail]>, afud <[e-mail]> writes:
>If you have an antenna tuner that has Forward Power reading at the same time
that
>you have a Reflected Power reading, is this called a coupled circuit?
>Thanks in advance for your help.
>Please post answer/comments/help to newsgroup.
>CB 235 Godfather
>

Probably, but likely not in the way that you are thinking about!  Even if your

coupler had only one meter and it had to be switched to get either forward
or reflected indications, it still is "coupled" to the circuit.

These devices work by sampling a very tiny bit of the energy from a
short section of the feed line going through the box.  The circuit can be
hooked up so that arranged one way, it looks at forward power.  Reversed,
it looks at power coming back into the box that may be reflected back from
the antenna.

When there are two meters that read at the same time, there are just two
separate sections in it that let you see both readings at once on two meters,
or one meter with two needles in it.

For the whole idea to even work, there must be *SOME* energy sampled
from the line!  It gets that sample by "coupling" the sampling section to
the little section of feed line.  In a simple sense this sampling is the
act of coupling...   That make it all better now?

The anount of power lost in the sampling section through this coupling is
very tiny and insignificant to the antenna, but sure does help you!!!

I get the feeling that you have found this user group and are new here.
The subject of antennas and things like this is a very fascinating and
interesting thing.  If you are new to this, I hope that you continue your
digging into things, maybe even to the point you fiure out you want to
join the ham radio people, if you are not a ham right now...

In my 44 years as a ham operator I've had a lot of fun asking questions
and a lot of respect for the many, many people that helped me out....

//-----------------------------
Mike - W5WQN
[e-mail]
[e-mail]



From [e-mail] Thu Jan 02 17:17:51 1997
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!usenet.eel.ufl.edu!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!newsfeed.internetmci.com!usenet.logical.net!news
From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: FS: CB Service Manuals (Tram)
Date: Tue, 24 Dec 1996 16:39:48 GMT
Organization:
Lines: 44
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
NNTP-Posting-Host: dialup034.qnsbny1.capital.net
X-Newsreader: Forte Free Agent 1.1/32.230

[e-mail] wrote:

>In article <[e-mail]>, [e-mail] writes:
>
>>>----------------------------------------------------------
>>Perhaps the origina poster just thought anyone reading a radio
>>oriented newsgroup would have some interest in the items. A kinder,
>>gentler answer wouldn't have hurt.
>>--
>>73,
>>Butch N2YMJ
>>
>>
>
>Anyone silly enough to sell CB manuals deserves a terse reply. He didn't
>read the FAQ of the newsgroups.
>
>1.) These groups are NOT the place for for sale postings of any types,
>that's in the FAQ list
>
>2.) The fact it is CB puts it out of amateur groups, that's in the FAQ
>list
>
>3.) This is an antenna group, that's in the heading.
>
>4.) A Tram is a CB radio that is designed to be easily modified to VFO
>operation and power changes. It is designed outside the sprit of the law
>for those who enjoy operating outside the CB band, and was forced off the
>market at various times by the FCC.
>
>Four strikes and he's out. The place to sell stuff is not here, and the
>place to sell CB junk is in the CB section. I stand by my comment, what
>the hell does a tram manual have to do with a Ham antenna forum.
>
>The correct answer to my question is "NOTHING".
>
>73 Tom

You could have explained these facts to the original poster. He or She
may have been new at this, and didn't know the FAQ's. Not everyone can
look down from a high mountain of superior knowledge as you do.
--
73,
Butch N2YMJ


From [e-mail] Thu Jan 02 17:17:52 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!newsfeed.internetmci.com!news2.jaring.my!usenet
From: Peng-Kuan <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Long broken wire antenna
Date: Tue, 24 Dec 1996 09:02:15 -0800
Organization: HomeUser
Lines: 12
Message-ID: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: j14.glg65.jaring.my
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X-Mailer: Mozilla 3.01Gold (Win16; I)

Hi all,

Question: Is a eg 10-metre copper wire antenna as
effective as a 3-3-4 metre wire joined with solder at its ends.


--

-pklee

[ [e-mail] ]
[ Penang, Malaysia    ]


From [e-mail] Thu Jan 02 17:17:54 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!news-feed.inet.tele.dk!xara.net!emerald.xara.net!netcom.net.uk!dispatch.news.demon.net!demon!mail2news.demon.co.uk!microvst.demon.co.uk!tgold
From: [e-mail] ("Anthony R. Gold")
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Anyone try 1.5 KW into TA 33 Junior beam?
Date: Tue, 24 Dec 96 17:39:10 GMT
Organization: Microvest Limited, London
Lines: 27
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
Reply-To: [e-mail]
X-Mail2News-User: [e-mail]
X-Mail2News-Path: microvst.demon.co.uk
X-Newsreader: Demon Internet Simple News v1.30

In article <[e-mail]> [e-mail] "Jan PA0LBN" writes
:

> In article <[e-mail]
u>
>  "John T. Young" <[e-mail]> writes:
>
> >Wondering if anyone has tried loading up a Mosely TA33 Jr. or TA33 Jr WARC
> >(this is what I've got) to 1.5 kilowatts PEP SSB. I know they are rated
> >for 1.2 kw on ssb and 500 watts on cw, but I'm wondering if there is
> >enough tolerance +/- for occaisional full legal output on ssb.

> Once I saw a burned out trap of a Mosley beam which had been on the roof
> for several years.  The coil looked oxidized and there were debris of
> spiders in it.
> So If your beam is up for a couple of years allready, I would't try.

The difference between 1.2kW and 1.5kW is a 25% power increase which
causes less than a 12% increase in rf voltage across/current through
the traps. I would guess that all these problems were unrelated to
such a trivial increase and that you'd have had the very same problem
with that one oxidized trap even at the rated power.

Regards,
--
   Tony - G3SKR / W2TG                   email: [e-mail]
                                                [e-mail]
                                        packet: g3skr@n0ary.#nocal.ca.usa.na



From [e-mail] Thu Jan 02 17:17:55 1997
Path: news1.epix.net!news3.epix.net!uunet!in2.uu.net!205.252.116.190!feed1.news.erols.com!howland.erols.net!cliffs.rs.itd.umich.edu!portc01.blue.aol.com!audrey01.news.aol.com!not-for-mail
From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: MFJ259 antenna analyzer
Date: 24 Dec 1996 18:07:30 GMT
Organization: AOL http://www.aol.com
Lines: 18
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]
X-Newsreader: AOL Offline Reader

In article <[e-mail]>,
[e-mail] (DHoxworth) writes:

>
>Just a note to say I have been using the new rechargable alkaline
>batteries in mine and they seem to work well... I have not had any
>problems with the battery holders.
>Yours Truely,
>Dave Hoxworth, AA8KJ

I've got two or three of em and the holders have not been a problem. I
faxed MFJ a copy of the battery holder thing to see how many they have
trouble with. I suspect they may use a couple vendors for the holders.

Maybe someone should send in a bad holder, so they can see what type it
is?

73 Tom


From [e-mail] Thu Jan 02 17:17:56 1997
Path: news1.epix.net!news3.epix.net!uunet!in1.uu.net!152.163.170.17!newstf01.news.aol.com!audrey01.news.aol.com!not-for-mail
From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: MFJ259 antenna analyz
Date: 24 Dec 1996 18:07:32 GMT
Organization: AOL http://www.aol.com
Lines: 27
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]
X-Newsreader: AOL Offline Reader

In article <[e-mail]>,
[e-mail] (Roland Stiner) writes:

>CS>From: Costas Spanos <[e-mail]>
>
>CS>The 259 is great, but I did find out one thing using it: Try to do so
>  >when the band is quiet. The 259 sends a small signal to the antenna
and
>  >is looking for reflected power. This signal level is very small, and
>  >easily comparable with strong signals that your antenna might be
>  >receiving at the time. Since the front end of the 259 is not very
>  >selective, strong signals in nearby frequencies might also influence
>  >the measurements.
>
>You would do better with the 209B (or 204B can't remember the
>number right now) resistance meter. I found that to work much better and
>be more useful.
>
>

All antenna analyzers have this problem, because the bridge has NO
selectivity at all.

If the antenna voltage from a local BCB station is over a 1/4 volt or so,
it will show up on the meter.

73 Tom


From [e-mail] Thu Jan 02 17:17:57 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Need help matching a Beverage!!!
Date: 24 Dec 1996 18:07:35 GMT
Organization: AOL http://www.aol.com
Lines: 21
Message-ID: <[e-mail]>
References: <59nh1v$[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]
X-Newsreader: AOL Offline Reader

In article <59nh1v$[e-mail]>, [e-mail] (Mike Kraml) writes:

>  I can not find that book anywhere in St. Louis.  Is there any way you
can
>summerize and fill me in on what he says?  Thanks, 73, Mike...

I use a stack of three or four ferrite beads, FB-73-601 type. Any stack of
73 mix beads about one inch long will work.

Use a one turn winding (for the feedline) and three turn winding (for the
antenna).

DO NOT TIE the secondary to the primary, or ground the coax to the same
ground as the antenna. Use a different ground rod several feet away if you
want to ground the far end of the feedline.

If you tie the antenna ground and the coax ground together, common mode
current will excite the ground and you will likely lose F/B ratio and S/N
ratio.

73 Tom


From [e-mail] Thu Jan 02 17:17:58 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!cliffs.rs.itd.umich.edu!portc01.blue.aol.com!audrey01.news.aol.com!not-for-mail
From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: GAP TITAN DX-VIII?  My S.O.S. testimonial.
Date: 24 Dec 1996 18:07:39 GMT
Organization: AOL http://www.aol.com
Lines: 24
Message-ID: <[e-mail]>
References: <[e-mail]>
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X-Admin: [e-mail]
X-Newsreader: AOL Offline Reader

In article <[e-mail]>, ken coleman <[e-mail]> writes:

>I have been very satisfied with this compromise, mounted on a 10 ft.
>section of mast, lashed to a dead dogwood snag in the yard.  I finished
>DXCC fairly quickly during down sunspots and have had fun with signal
>reports, normally around 5-3 to 5-7 with 100 watts/Yaesu FT-890.
>Sometimes I get a 5-9.  Sometimes I break a pileup.  Sometimes I don't
>get heard.  It's about AMATEUR radio.  If I wanted to catch all the fish
>in the pond, I wouldn't take a pole.
>
>

When I tested one here, it was down a few S units from a ground mounted
Butternut. The ARRL found the same thing in a review, but I don't recall
the issue.

Ground independent verticals often have less performance than a similar
sized antenna over a good ground system, and I'm sure the caox stube in
the antenna adds to the loss.

Add Butternuts, Hy-towers, and other verticals using radials and dipoles
to the list of antennas you can expect to beat you in pile ups.

73 Tom


From [e-mail] Thu Jan 02 17:17:59 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!tezcat!news.bbnplanet.com!cam-news-hub1.bbnplanet.com!uunet!in3.uu.net!208.202.14.37!news.icanect.net!usenet
From: [e-mail] (Terry Simonds)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Long broken wire antenna
Date: Tue, 24 Dec 1996 19:37:01 GMT
Organization: Icanect
Lines: 26
Message-ID: <59pbgq$[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: 206.142.164.211
X-Newsreader: Forte Free Agent 1.0.82

Peng-Kuan <[e-mail]> wrote:

->Hi all,

->Question: Is a eg 10-metre copper wire antenna as
->effective as a 3-3-4 metre wire joined with solder at its ends.


->--

->-pklee

->[ [e-mail] ]
->[ Penang, Malaysia    ]


I think you mean: Is a wire antenna made from 3 pieces of wire, 3m,
3m, and 4m, soldered together to make a piece of wire 10m long as good
as a wire antenna made from one continuous 10m piece of wire?

If that's what you mean:  the answer is   "YES"


73--Terry/WB4FXD in Ft. Lauderdale, FL
[e-mail]



From [e-mail] Thu Jan 02 17:17:59 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!worldnet.att.net!arclight.uoregon.edu!newsfeed.direct.ca!newsfeeder.toronto.ican.net!torn!news.bconnex.net!clicnet!news.clic.net!rcogate.rco.qc.ca!altitude!usenet
From: Madjid <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Vertical antenna properties
Date: Tue, 24 Dec 1996 15:00:00 -0500
Organization: ORION Microsystems
Lines: 19
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: dynamicppp-6.hip.cam.org
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To: [e-mail]

David Cooley wrote:
>
> Could someone post, or point me in the right direction to, properties of
> vertical antennas by 1/8 wavelength increments, IE: feed impedance,
> radiation patterns, Dbd gain etc.

Hi Dave,

There are no definite answer to your question.
If you want formulas they are too complicated to
use anyway so the best thing is to simulate the
antenna.

Go to my page and download NEC4WIN, you will be
able to simulate your vertical, get impedances
and patterns etc...
-------------------
Madjid, VE2GMI - Home Page: http://www.CAM.ORG/~mboukri
NEC4WIN Antenna simulation for Windows


From [e-mail] Thu Jan 02 17:18:00 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!feed1.news.erols.com!howland.erols.net!portc02.blue.aol.com!audrey01.news.aol.com!not-for-mail
From: [e-mail] (K1BQT)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: ARRL antenna handbook - 6M yagi
Date: 24 Dec 1996 20:01:21 GMT
Organization: AOL http://www.aol.com
Lines: 16
Message-ID: <[e-mail]>
References: <59ounv$[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

RE: The Handbook 6-M 3-El beam:  "If you do build one don't expect a 1:1
VSWR across the band. Its more like 1.3 at best."


I used that same matching system on my first 6-M beam and did manage to
get the VSWR down a bit lower.  However, the bandwidth was very narrow--so
much so that precipitation detuning was a serious problem.  Instead of
transforming the element's low impedance up to 200 ohms via the hairpin
(to match the balun impedance), I had better luck matching up to 50 ohms
and using a broadband current-choke type balun.  I was able to get a 1:1
match with a smaller hairpin--and was also able to get broader 2:1
bandwidth--all but eliminating the rain-loading problem.

Rick   K1BQT




From [e-mail] Thu Jan 02 17:18:01 1997
Path: news1.epix.net!news3.epix.net!uunet!in3.uu.net!152.163.170.17!newstf01.news.aol.com!audrey01.news.aol.com!not-for-mail
From: [e-mail] (K1BQT)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: MFJ259 antenna analyzer
Date: 24 Dec 1996 20:14:08 GMT
Organization: AOL http://www.aol.com
Lines: 14
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

Hi Dave:

>In his reply, Tom said, "I've got two or three of em and the holders have
not been >a problem. I faxed MFJ a copy of the battery holder thing to see
how many they >have trouble with. I suspect they may use a couple vendors
for the holders."

I have a 249 and a 259 here.  The holder in my 249 did the same thing, so
I called the plant and they sent me a new one.  The bad one was white--I
think the new one is black.  The plastic on my white holder was very
brittle and wouldn't withstand the spring pressure when batteries are
inserted.  If you need a replacement, contact MFJ.

-- Rick  K1BQT


From [e-mail] Thu Jan 02 17:18:02 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!news.kei.com!newsfeed.internetmci.com!newsfeed.direct.ca!newsfeeder.toronto.ican.net!torn!news.bconnex.net!clicnet!news.clic.net!rcogate.rco.qc.ca!altitude!usenet
From: Madjid <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Problem with RF - HELP!
Date: Tue, 24 Dec 1996 15:36:29 -0500
Organization: ORION Microsystems
Lines: 29
Message-ID: <[e-mail]>
References: <59k7vm$[e-mail]>
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X-Mailer: Mozilla 3.0 (Win16; I)

[e-mail] wrote:
>
> I just bought a receiver and a powered indoor antenna. I receive signals
> just fine as long as the computer is off. When I turn the computer on, it
> generates so much garbage RF that the receiver gets very little FM and NO
> AM. If anyone has a solution to this problem, please reply via email.
>
> Thanks - MdS

1. Throw your computer in the garbage and buy a good one :)
   Most brand name computers are FCC approved and tested, and
   very few generate garbage. Clones on the other hand are prone
   to generate a lot of spurious from all parts of the machine

   Power supply (switching), Main board oscillators and signals
   Video etc... If you have multiple sources they create beats
   that will blast complete bands :)

There is a document on computer generated RFI and how to attempt
to track and clean (a little) the garbage at the ARRL site
  http://oak.oakland.edu:8080/pub/hamradio/arrl/

in /pub3/hamradio/arrl/bbs/general

Good luck!

-------------------
Madjid, VE2GMI - Home Page: http://www.CAM.ORG/~mboukri
NEC4WIN Antenna simulation for Windows


From [e-mail] Thu Jan 02 17:18:03 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!super.zippo.com!zdc-e!ix.netcom.com!news.enteract.com!www.nntp.primenet.com!nntp.primenet.com!newspump.sol.net!howland.erols.net!cliffs.rs.itd.umich.edu!portc01.blue.aol.com!audrey01.news.aol.com!not-for-mail
From: [e-mail] (RVank)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: HF DELTA-LOOP Balun
Date: 24 Dec 1996 21:59:54 GMT
Organization: AOL http://www.aol.com
Lines: 7
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

I use a coax matching transformer which is VERY easy to do.  Use 75 ohm
coax, with the length determined as follows.  246 X velocity factor of
coax, divide that by the frequency in MHZ. For example: I recently made a
40 meter Delta Quad for 7.150  the coax was figured this way.  246 X .78
divided by 7.150 which gave me a length of 22.8 ft.  This gave me a
perfect match with a 1:1 on the resonant freq. This is much cheaper and
faster than ordering a balun.  73 de kx8y roger


From [e-mail] Thu Jan 02 17:18:04 1997
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!news-out.communique.net!mr.net!newshub.tc.umn.edu!lynx.unm.edu!SantaFe!usenet
From: "David B. Holtkamp (K5KH)" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Veritcal vs. G5RV ???
Date: 24 Dec 1996 23:41:57 GMT
Organization: The Santa Fe Institute
Lines: 14
Message-ID: <01bbf1f1$cc7d59c0$[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: 198.59.109.166
X-Newsreader: Microsoft Internet News 4.70.1155



> I do not have space for a full size G5RV so I have to use the vertical.
> But, if I had the choice, I would go for the G5RV (which I use when I'm
> in DU.)  Performs much better and it has no adjustments.  Just solder it
> up and away you go.


  But you better have an antenna tuner (or something similar) or you will
be *very* disappointed.  I use a G5RV (double sized for 160 m) and am heard
well all over...now if I had the room for some beverages so *I* could hear
the folks who can hear *me*!

  73's de david (K5KH)


From [e-mail] Thu Jan 02 17:18:05 1997
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!news.sprintlink.net!news-pen-4.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!news.primenet.com!news.primenet.com!not-for-mail
From: "Brian K. Short" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Mailing List Reflector
Date: 24 Dec 1996 17:16:06 -0700
Organization: Primenet Services for the Internet
Lines: 20
Message-ID: <[e-mail]>
Reply-To: [e-mail]
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X-Mailer: Mozilla 3.0Gold (Win95; I)
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BitBucket is a mailing list (reflector) devoted to
specialized amateur radio communication techniques.

       -SSTV, ATV, FAX, APT, DSP
       -Packet, Pactor, GTOR, Clover, RTTY
       -R/C, Telemetry, Balloons, Rockets, Robotics
       -homebrew, modifications, interfacing, widgets, etc

To subscribe:
TO:      [e-mail]
SUBJECT:
BODY:    SUBSCRIBE bitbucket

As we encourage the free exchange of ideas, if you pay for
email service by the byte you may want to consider carefully
before subscribing.

BitBucket has NO organizational sponsors.

Brian [e-mail]


From [e-mail] Thu Jan 02 17:18:06 1997
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From: "David A. Cooley" <[e-mail]>
Newsgroups: ipass.ham-radio,triangle.radio,rec.radio.amateur.antenna
Subject: vertical antenna spacing
Date: Tue, 24 Dec 1996 19:19:43 -0500
Organization: IPass.net
Lines: 14
Message-ID: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: customs527.ipass.net
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Xref: news1.epix.net triangle.radio:2318 rec.radio.amateur.antenna:33162

Tnx for reading.
I have built 3 J-Poles, 2m, 220 and 70cm.  Wondering if there is a
recomended spacing I should use between them to keep interference to a
minimum.

Thanks,
Dave

--
========================================================================
David Cooley N5XMT                  Packet: N5XMT@W4RAL.#RTP.NC.USA.NOAM
Internet: [e-mail]    And Web: http://www.ipass.net/~cooldave/
Sponges grow in the ocean... Wonder how deep it would be if they didn't!
========================================================================


From [e-mail] Thu Jan 02 17:18:08 1997
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From: [e-mail] (John Warren)
Newsgroups: rec.radio.amateur.antenna
Subject: [DX] Re: Titanex Verticals 160&80
Date: 25 Dec 96 00:25:34 GMT
Organization: ucsd usenet gateway
Lines: 45
Sender: [e-mail]
Message-ID: <[e-mail]>
Reply-To: John Warren <[e-mail]>
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]

Dave K7SX wrote:

  |Does anybody have any info on the Titanex verticals being made
  |in Germany  for 80 and 160. They are supposed to me made of
  |aluminum and titanium, about 26 meters high, and be very good.

Several people on this Reflector helped me track down info on Titanex
verticals about a year ago. They do indeed look very good, but to my
knowledge they are still not sold directly in the States, and they are
STAGGERINGLY expensive!!!
I concluded that a 4-square 75ssb array with elevated radials using Titanex
verticals would cost a good chunk of a 2-el 75M Yagi installed on an
appropriate tower. Titanex verticals are incredibly light-weight, but need
LOTS of guying.

The V160E is a 26m (85ft) high full-power 160/80/40 vertical weighing only
7.5Kg (16.5lbs)! The V80E is 20.5m (67ft) for 80/40 and weighs 6Kg
(13.2lbs). The V80LR is for 80M only, 25M (82ft total) weighing 8Kg
(17.6lbs), but this includes an insulator at 4.5m (14.75ft) to support
elevated radials.

Now for the fun part! These were the 1995 prices, delivered in Germany,
using a conversion rate of $1 = DM 1.55.
    V160E       DM1595      $1029
    V80E        DM975       $629
    V80LR       DM1495      $965
There is some discount for multiple units.

It seems to me that the real niche for Titanex verticals is in
DXpeditioning. For example, they have a V8030E which covers 80/40/30.
Height is 15.5m (51ft), weight 4Kg (8.8lbs), and it packs down to 1.5M
(5ft) for transportation! 1995 cost DM965 ($623).

Their 1995 address was Titanex Antennentechnik, Burgstall, D-94339
Leibfing, Germany.

John, NT5C.


-------
Forwarded via the Internet DX Mailing List.

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From [e-mail] Thu Jan 02 17:18:08 1997
Newsgroups: rec.radio.amateur.antenna
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!zombie.ncsc.mil!nntp.coast.net!howland.erols.net!feed1.news.erols.com!news.ecn.uoknor.edu!munnari.OZ.AU!ihnp4.ucsd.edu!newshub.nosc.mil!news!horowitz
From: [e-mail] (Alan M. Horowitz)
Subject: Re: Phased arrays for HF reception
Message-ID: <[e-mail]>
Sender: [e-mail]
Organization: NCCOSC RDT&E Division, San Diego, CA
References: <[e-mail]> <[e-mail]>
Date: Wed, 25 Dec 1996 01:05:42 GMT
Lines: 4

This array exists at The US Coast Guard Atlantic Master Receive Station
(Ballahack Road Chesapeake VA 23322). I know nothing about the details.

The guys there are friendly. Drop a letter to them, they might help you.


From [e-mail] Thu Jan 02 17:18:10 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!mindspring!uunet!in1.uu.net!192.203.228.5!DIALix!brisbane.DIALix.oz.au!Newsmaster
From: Murray Kelly <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: ** Transmitting Loop on Mobile: Why not? **
Date: Wed, 25 Dec 1996 12:16:54 +1000
Organization: M P Kelly (Med) P/L
Lines: 16
Message-ID: <[e-mail]>
References: <59fnd8$[e-mail]> <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: @dy05.faraday.dialix.com.au
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OK Tom, you don't like loops! W6SAI does but that does raise a question
in my mind. Why does the loop have to have a round conductor? I've seen
this before stated baldly but never seen an explanation.

[e-mail] wrote:
> 3.) Why use an antenna that has such high currents it requires complex
> mechanical construction ( ie welded joints, a special capacitor, a smooth
> round large diameter and conductive radiator )?


Cheers.
******************************************************************
*      Murray Kelly vk4aok      [e-mail]     *
*      29 Molonga Ter. / Graceville/ QLD. 4075/ Australia        *
*      ph/fax Intl+ 61 7 3379 3307  mobile [phone]           *
******************************************************************


From [e-mail] Thu Jan 02 17:18:11 1997
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!usenet.eel.ufl.edu!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!worldnet.att.net!news.dra.com!news.inlink.com!not-for-mail
From: [e-mail] (Gary V. Deutschmann, Sr.)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Six Meter Antenna Plans
Date: Wed, 25 Dec 1996 03:06:03 GMT
Organization: Inlink
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If you are interested in a 6-meter J-Pole, Stacked-J or Mirrored-J - I
have the text, numbers and k-factor charts on my web page at
http://www.inlink.com/~raiar

Merry Christmas
TTUL
Gary




From [e-mail] Thu Jan 02 17:18:12 1997
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From: Bart Dolega <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: 4el Quad for 20m
Date: Tue, 24 Dec 1996 21:43:12 -0600
Organization: :-)
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I'm looking for plans of REAL GOOD QUBICAL QUAD Antenna for 20m
3el-4el-5el ... I heard something about 4el Quad with 2 feeds (??)
--

                         _   _            _
 Vy 73 ! de         |_/ |_) (_| |\/| |   |_|      also SQ8AQV
                    | \ |_) ._| |  | |__ | |
                Bart Dolega  Harwood Hts,IL USA
-AmprNet:[e-mail]-Ax25:kb9mla@db0fho.#nds.deu.eu-
                -Internet:[e-mail]-
    WWW Page: http://www.poznan.ampr.org/users/kb9mla.html


From [e-mail] Thu Jan 02 17:18:13 1997
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From: [e-mail] (Gareth Crispell)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Long wire antenna
Date: Wed, 25 Dec 1996 04:20:17 GMT
Organization: Rowdy Cats Inc.
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[e-mail] (Barry Anderson) wrote:

>In article <58t7ft$[e-mail]>,
>[e-mail] says...
>>
>> Looking for info on using coax to connect a long wire antenna. Should the
>> shield be grounded outside? Any help appreciated.
>> George - KE4DXM
>>
>>
>George ...
>
>    My experiance with long wire antennae is NOT to feed it with coax.
>The capacitance to ground added by the feedline hoses up everything and
>the coax also introduces losses into the system. Bring the long wire
>right into your tuner to feed it. Don't use coax feeds.
>--
>Barry Anderson K3SUI
>Frederick, MD.
>[e-mail]
The voltage at the feedpoint of a "longwire" is really high. If you
bring that much voltage right up to the line matcher you will almost
certainly have RF all over everything in the shack.
My advice is to take the loss the coax conversion introduces. Use a
really nice 4:1 that can stand a big mismatch. Shield to ground
outside.  At least two 8-10 turn inductance coils in the coax.



.....at the dawn of the New Age of Man,
     they will abide with us.
     Their glory and fire will burn like
     sparks among the stubble!

 Gareth




From [e-mail] Thu Jan 02 17:18:14 1997
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From: Avatar <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Passive Repeater???
Date: Tue, 24 Dec 1996 20:40:19 -0800
Organization: Front Range Internet, Inc.
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Anikan wrote:
>
> Hello all, I am looking for information on a Passive Repeater. As far as i
> understand it, it is notheing more than two antennas hooked up by a
> certain length of feedline. No gain, but one would be useful to get a
> signal into an area (or over an obstacle) without the regular equipment. I
> would like to set one up to allow regular repeater access from a dead spot
> in town.  Any help would be much appreciated.
>
> larry nixon VE7LFN

I remember reading a short article in Radio TV News (or the other
one) magazine about 35 years ago. As I recall the story a university in
Denver wanted to receive an FM or TV station in Cheyenne. They put two
rhombics up on one of the mountains. One rhombic was pointed at Cheyenne
and the other at the university. A feedline ran between them. It worked
fine. There is no reason why two Yagis wouldn't work just as well.

A passive repeater by definition has no active amplifier installed and
therefor, no license is required for the system.

Regards,
W0MAY



From [e-mail] Thu Jan 02 17:18:15 1997
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From: "Ian McCloy" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Autek New Antenna Anlsyer
Date: 25 Dec 1996 04:42:20 GMT
Organization: BCTEL Advanced Communications
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Anyone know anything about this new product.  I wonder if it is as good as
the ones that

MFJ build.  If anyone knows anything about this new product.  Please let me
know as I am thinking of

buying one.  Tnx Ian    Ve7ira


From [e-mail] Thu Jan 02 17:18:16 1997
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From: [e-mail] (Svetozar Iliev)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Ham-Ant Digest V96 #919
Date: 25 Dec 96 08:15:36 GMT
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NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]

unscribe
[e-mail]



From [e-mail] Thu Jan 02 17:18:17 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Passive Repeater???
Date: Wed, 25 Dec 1996 01:49:36 -0800
Organization: Pacific Bell Internet Services
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Anikan wrote:
>
> Hello all, I am looking for information on a Passive Repeater. As far as i
> understand it, it is notheing more than two antennas hooked up by a
> certain length of feedline. No gain, but one would be useful to get a
> signal into an area (or over an obstacle) without the regular equipment. I
> would like to set one up to allow regular repeater access from a dead spot
> in town.  Any help would be much appreciated.
>
> larry nixon VE7LFN


WLS-TV (Channel 7) Chicago  used two different microwave passive
repeaters in their studio transmitter links.  Each consisted of two dish
antennas ( I think they were 4 or 6 foot diameter) connected by a ahort
length of waveguide. WLS-TV transmitted from the Sears tower,
about 1.5 miles southwest of the studio.  Line of sight path was blocked
by a number of tall buildings.  One microwave path ran north two blocks
to the Marina City building, and got re-radiated by the second dish
toward the southwest.  A second path started east to a pair of antennas
on a nearby building, then the beam was turned southwest.

We ran about 1 watt of transmit power from various 2 and 13 gHz
transmitters aimed at these passive repeaters.  Distance from the studio
to the repeaters was about 1000' in one case and perhaps 2000' in the
other.  The repeaters passed 2 and 13 gHz  at the same time with no
problem. Signal level at the Sears tower was very good.  We had some
transmitter to studio links running the opposite direction. No problem.

I worked in engineering at WLS in the late 70's to about 1980 and this
system had worked with little or no trouble since about 1974.  I don't
know if they still use it.

At least one other Chicago TV station used a passive flat-plate reflector
like a big tilted metal billboard on the side of a building to bounce
their 7 gHz microwave signal to the Jonh Hancock Center.  That station
transmitted from a 6' dish, with abiut 1 watt power from the roof of a
3-story building.  The passive reflector was several blocks from the
studio, and bent the beam about 90 degrees in azimuth and upwards to the
transmitter site on the Hancock Center 97th floor.

One more passive reflector story. An old time ham told me there was once
a pair of large rhombics installed atop an 8000' mountain near Frazier
Park California, about 75 miles north of LA.  This antenna could conect
LA to the Central valley Bakersfield, Fresno, etc.  I don't know if this
is true.   Maybe someone knows more.

I couldnt say if such an idea would work for you, but passive repeaters
have worked very well for some TV companies.

73,  Mike   WA3RVS


From [e-mail] Thu Jan 02 17:18:18 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: FS: MISC. ITEMS!
Date: Wed, 25 Dec 1996 14:19:32 +0000
Organization: Alpha.net -- Milwaukee, WI
Lines: 26
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I have the following for sale:

Radio Shack PRO-50 Scanner

The perfect scanner the beginner!

List Price: $139.99
Asking:      $65.00

Sanyo Black & White Survellance Camera

Asking:     $75.00

Both prices are NOT firm!
Make an offer via e-mail!

Also, more info available by e-mail!

--
*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
-  *<|:)    Happy Holidays!   *<|:)   -
*         [e-mail]          *
-                  or                 -
*        [e-mail]         *
-  http://personal.pitnet.net/andrewg -
*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*


From [e-mail] Thu Jan 02 17:18:19 1997
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From: Phil Wheeler <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Veritcal vs. G5RV ???
Date: Wed, 25 Dec 1996 06:49:08 -0800
Organization: Netcom
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To: [e-mail]

Jim, modern vertical (GAP Titan, R7000, DX-77) work fine without
radials.

But I generally agree with your thughts re G5RV vs. vertical.  I have
both and find the ability to switch between them a real plus.

Phil W7OX


From [e-mail] Thu Jan 02 17:18:20 1997
From: [e-mail] (Hugh Duff)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Veritcal vs. G5RV ???
Date: Wed, 25 Dec 1996 16:18:50 GMT
Organization: ICA Canada
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[e-mail] (W6KKT Jesse) wrote:

>On Sat, 21 Dec 1996 03:45:42 GMT, [e-mail] (Hugh Duff) wrote:

>>I'd like to hear from some experienced HFers...
>>I will soon errect a modest antenna for HF.  Just wondering what would
>>perform better  (I own both but only wish to put up one of them)...
>>
>>A  G5RV strung out in an inverted-V configuration that is raised to
>>about 50' at the feedpoint with each leg running out to the corners of
>>the backyard   OR   a vertical antenna at ground level in the center
>>of the backyard with radials buried under the soil ?
>>
>>I'm aware that the vertical offers a lower angle of radiation which is
>>ideal for DXing however  I'm leaning towards the G5RV since I'm
>>reluctant to the thought of greatly reducing  the usuable space in the
>>backyard once the vertical is installed.
>>I'm not much of a DX chaser anyway...my HF operation is more casual.
>>I just wonder after all considered if the G5RV would be a  compromise
>>compared to the vertical.
>>
>>Thanks de Hugh, VA3TO

>Hi Hugh, a G5RV was never designed for a inverted "V" config.  On the
>higher bands it's performance and matching problems leave a lot to be
>desired.
>Have you considered multiple inverted Vees (one for each band you want
>to work)  seperated 4 inches, connected to a common coax (thru a
>balun)?  It performs much better than the G5RV inverted V.
>Good Luck, Jesse, W6KKT


Yes but my main concern is to keep the HF antenna as modest as
possible. Its all about compromise I suppose but which is the best
for the least is my question.  I actually have a tower and a triband
beam that I can put up but would prefer not to in my new nieghborhood.
Best performance/ least of an eyesore ???

Thanks, Hugh



From [e-mail] Thu Jan 02 17:18:22 1997
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From: [e-mail] (W6KKT Jesse)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Veritcal vs. G5RV ???
Date: Wed, 25 Dec 1996 17:14:02 GMT
Organization: Microserve Information Systems (800)-380-INET
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On Sun, 22 Dec 1996 01:00:26 GMT, [e-mail] (W6KKT Jesse)
wrote:

>On Sat, 21 Dec 1996 03:45:42 GMT, [e-mail] (Hugh Duff) wrote:
>
>>I'd like to hear from some experienced HFers...
>>I will soon errect a modest antenna for HF.  Just wondering what would
>>perform better  (I own both but only wish to put up one of them)...
>>
>>A  G5RV strung out in an inverted-V configuration that is raised to
>>about 50' at the feedpoint with each leg running out to the corners of
>>the backyard   OR   a vertical antenna at ground level in the center
>>of the backyard with radials buried under the soil ?
>>
>>I'm aware that the vertical offers a lower angle of radiation which is
>>ideal for DXing however  I'm leaning towards the G5RV since I'm
>>reluctant to the thought of greatly reducing  the usuable space in the
>>backyard once the vertical is installed.
>>I'm not much of a DX chaser anyway...my HF operation is more casual.
>>I just wonder after all considered if the G5RV would be a  compromise
>>compared to the vertical.
>>
>>Thanks de Hugh, VA3TO
>

In my opinion, a "back yard" ground mounted  HF vert antenna system
has few positive characteristics and many negative ones.

1.  Not only requires an extensive radial system, but also requires
very good soil conductivity to achieve lowest vert take off angle and
low ground loss.

2.  Any nearby buildings, trees, cars etc; will act as rf absorbers
(the higher the frequency the worse it gets).

3.  The rf field at ground level is very intense, and RFI really
becomes a problem.

4. Because most noise is vertically polarized received noise seems to
be much worse with vert systems.

5. A vert antenna system (including it's radial system)  is at it's
peak performance over salt water, and drops off rapidly the further it
is removed from that enviroment  (the effect on a horiz antenna is
little compared to the vert).  Verticals are ground intensive and
horizs need height for low take off.

6. A horiz dipole up 1/2 wl  will usually exhibit at least 3db (in
it's best directions) over a good  single vert radiator system.

7. In the city, I find, the best mounting position for a vert is as
high as you can get it ( top of building, tower, house etc), and use
above ground tuned radials. You will still have much RFI problems.

73, Jesse, W6KKT






From [e-mail] Thu Jan 02 17:18:23 1997
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From: [e-mail] (W6KKT Jesse)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Veritcal vs. G5RV ???
Date: Wed, 25 Dec 1996 17:54:56 GMT
Organization: Microserve Information Systems (800)-380-INET
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On Wed, 25 Dec 1996 06:49:08 -0800, Phil Wheeler
<[e-mail]> wrote:

>Jim, modern vertical (GAP Titan, R7000, DX-77) work fine without
>radials.
>
>But I generally agree with your thughts re G5RV vs. vertical.  I have
>both and find the ability to switch between them a real plus.
>
>Phil W7OX

Hi Phil, what is your meaning for "work fine"?  ALL vertical radiator
systems (no matter  what impedance point they are fed)  need a very
good rf ground, for maximum gain & lowest take off angle.

73, Jesse, W6KKT


From [e-mail] Thu Jan 02 17:18:24 1997
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From: [e-mail] (K1BQT)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Autek New Antenna Anlsyer
Date: 25 Dec 1996 18:33:06 GMT
Organization: AOL http://www.aol.com
Lines: 32
Message-ID: <[e-mail]>
References: <01bbf21f$9b570520$7b12c2cf@a1a03984>
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X-Admin: [e-mail]

>Anyone know anything about this new product.  I wonder if it is as good
as
>the ones that MFJ build.  If anyone knows anything about this new
product.  >Please let me know as I am thinking of buying one.

Hi Ian--

I have a RF-5 and it seems to work quite well.  I also have an MFJ-259.
The two devices are similar in that they will both give you VSWR readings
on 6 and 2 meters.  However, for me, that's where the similarity stops.

The RF-5 covers 220 and 432, which the MFJ does not--and the MFJ covers
all of the low bands--which the RF-5 does not.  When I'm running checks
outside, I find the MFJ meter is much quicker and easier to use (I find
the RF-5 controls a bit touchy--and I really prefer looking at an alalog
meter or a scope rather than a numerical display when making antenna
adjustments).  However, the RF-5 has some versitility that the MFJ lacks
for doing more "in-depth" analysis of RF circuits. On the other hand, the
MFJ has a much cleaner signal output (which I sometimes use as a
field-strength signal source)--and it has a far more accurate counter
which can be used for other tasks.

Although both units share a few similar functions, they are really very
different animals.  I can accomplish a lot more with the two of them
together than I can with either one by itself.  If you're main task is
tuning up 50-Ohm antennas from HF up through 2 Meters, the MFJ meter is
awfully hard to beat.  If you need to cut VHF harnesses to a precise
length, measure reactive impedances, or tune 440 MHz antennas, the RF-5
may be a better choice.  I also have a RF-1, and would say similar things
about that unit at HF.  Hope this helps.

Rick  K1BQT


From [e-mail] Thu Jan 02 17:18:25 1997
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From: "David A. Cooley" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 1/2-wave 'Quad'? THANKS
Date: Wed, 25 Dec 1996 13:34:36 -0500
Organization: IPass.net
Lines: 30
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References: <[e-mail]> <59eoa6$[e-mail]> <[e-mail]>
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Roger D. Placer wrote:
>
> I'd like to thank everyone for their advice and comments.
>
> I did try one thing over the weekend that was a bit odd: I built a
> single element half-wave loop for 146 MHz, open at the top, fed at a
> corner, and mounted on an old broomstick. What was strange was that my
> MFJ analyzer showed an SWR of 2.5:1 at the design frequency, and that
> WAS indeed the lowest SWR exhibited by the antenna. In addition, the
> resistance was approximately 90-100 ohms. The feedline was a short (5')
> length of RG-58/U.
>


Roger,
I've seen plans for a quad for 2m, and the loop has to be one piece of
wire, not open anywhere except where the feedline comes in.  Also, all
the plans I've seen show 1/4 wavelength per side to be 50 ohms at
resonance.
Later,
Dave



--
========================================================================
David Cooley N5XMT                  Packet: N5XMT@W4RAL.#RTP.NC.USA.NOAM
Internet: [e-mail]    And Web: http://www.ipass.net/~cooldave/
Sponges grow in the ocean... Wonder how deep it would be if they didn't!
========================================================================


From [e-mail] Thu Jan 02 17:18:26 1997
Message-ID: <[e-mail]>
Date: Wed, 25 Dec 1996 14:15:22 -0500
From: "Vernon J. Kunes, Jr." <[e-mail]>
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Bart Dolega wrote:
>
> DELTA-LOOP for 80m or DELTA-LOOP for 20m ?
> Which one would be better :-> I will TX on 14.200 :->
> Vy 73! de Bart
If you can put up the 80 mtr loop, there will be some gain at 20 meters.
I run a 80 meter horizontal loop and operate 10 meters when ever there
is a band opening and enjoy 6db or so gain .  Good luck.  73 de N2YZS
Merry Christmas


From [e-mail] Thu Jan 02 17:18:27 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.swap
Subject: FS:  ELECTRIC RADIO (1996)
Date: Wed, 25 Dec 1996 19:26:33 GMT
Organization: DelMarVa OnLine!
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Distribution: inet
Message-ID: <32c17eba.91367041@news>
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Loose issues of Electric Radio journal for sale.....   all 12 issues
of 1996, plus a bonus issue .... DEC 1994.
All 13 issues for  $ 18  postpaid.

Send e-mail to  [e-mail]  to confirm this.

Roy C. Pollitt  KD4HC



From [e-mail] Thu Jan 02 17:18:28 1997
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From: "R.Ponti" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Wanted: Bonneville or Signal receiver
Date: 25 Dec 1996 21:19:26 GMT
Organization: The Loop
Lines: 3
Distribution: world
Message-ID: <01bbf2a9$201284e0$[e-mail]>
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X-Newsreader: Microsoft Internet News 4.70.1155

Looking for, working condition, Bonneville receiver and controller
(satellite or cable) and/or Signal/Lotus FM market data receivers.
Please email me availability and price.


From [e-mail] Thu Jan 02 17:18:29 1997
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From: [e-mail] (DepShlomo)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Equipment For Sale
Date: 25 Dec 1996 22:36:51 GMT
Organization: AOL http://www.aol.com
Lines: 1
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
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IN WHAT COND IS THE R7 REPLY TO DEPSHLOMO @ AOL.COM


From [e-mail] Thu Jan 02 17:18:30 1997
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From: [e-mail] (Martin Ellis)
Newsgroups: rec.radio.amateur.antenna
Subject: Verticals and  Dipoles
Date: 25 Dec 96 22:57:54 GMT
Organization: ucsd usenet gateway
Lines: 45
Message-ID: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]

There is a thread concerning multiband verticals, and performance
comparisons with dipoles and other simple antennas.

Listening from the South Pacific for band openings on 10M I am
often surprised at the number of times the first stations
to break through, are using verticals.

To verify this I looked back in my log for one day with several
contacts on 10M.  Some of the contacts did not include the exchange
of antenna details.

UTC Date/Time   Station        Antenna
Nov 17, 1996
band closed up to 2300Z
2315z           KK5NC          GAP Vertical- New Mexico
2316z           W6FIE/mobile   Mobile vertical- near San Fran.
2320z           WA6OJR         5/8 vertical- near San Fran.
2344z           KF6BIR         Hustler vertical
2344z           W6RO           3 el T/B yagi- Queen Mary (KC6NGN).
2355z           N3RHU          (too weak to exchange details)
2357z           K6HI           Extended double zepp- Big Is Hawaii.
0011z           KE6WFW         California (no details)
0016z           WH6DCB         3 el yagi by CC- Hawaii
0020z           KB6IU          near San Fran.
0024z           XE1FSK         3 el yagi- Mexico
0026z           KE6IJI         A99 vertical- Sacremento
0028z           KM6CB          Pro67c Mosley- Los Angeles.
0034z           WD4NGB         7 el yagi- Tennessee

In this sample of 14 QSO's made on the same day on 10m,
during the bottom of the sunspot cycle, 5 were verticals, and
only one was a wire antenna (double extended zepp). Three contacts
did not exchange antenna details.
It is also fairly common for us to hear US beacons without any
SSB stations coming through on an otherwise *dead* band.  Beacons
are typically 10- 25w into an vertical or omni antenna, but often have
the advantage of an elevated site.
Overall, I think that stations with multiband verticals are
fairly represented amoung the stations we work on 10m, and would
appear to be ahead of dipoles.

Regards,
Martin ZL1ANJ
=============



From [e-mail] Thu Jan 02 17:18:31 1997
Newsgroups: rec.radio.amateur.antenna
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From: [e-mail] (Andrew S. Braytenbah Jr)
Subject: modified G5RV
Message-ID: <[e-mail]>
Date: Wed, 25 Dec 1996 23:36:55 GMT
Organization: Virginia's Public Education Network
Lines: 16

Hello,
        I am planning to build a G5RV, yet because I plan to
use plastic jacketted awg 12 wire, I am wondering if I should
make the legs less than 102 ft. Some have written that if this
type of wire is used, the legs should be about 95% (0.95) of
those from the standard formula.  Also, little has been written
that I or ARRL knows of that might help me achieve
near-resonancy without leaving it to the tuner to do all the
work. Any experience or ideas in helping me come to grips with
these two concerns (modified formula for shortenning, and
making the antenna efficient on 20m would be appreciated.

                                TNX,


                                        Drew, KD4QCX


From [e-mail] Thu Jan 02 17:18:32 1997
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From: "K2II" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: VHF and UHF preamp wanted
Date: 25 Dec 1996 23:43:48 GMT
Organization: Relationships
Lines: 3
Message-ID: <01bbf2bc$b9c835e0$ee5ca7cd@default>
NNTP-Posting-Host: tcp238.spec.net
X-Newsreader: Microsoft Internet News 4.70.1155

Wanted: 144 and 440 MHz preamp wanted in excellent condition. Either mast
or shack mounted. E-mail [e-mail].
Thanks.


From [e-mail] Thu Jan 02 17:18:33 1997
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From: "David A. Cooley" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.equipment,rec.radio.amateur.misc,rec.radio.amateur.swap
Subject: triplexer needed
Date: Wed, 25 Dec 1996 19:01:21 -0500
Organization: IPass.net
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Hello all, Tnx for reading.
Looking to buy a good used triplexer for 144/220/440 mhz... between
100-250 W max power would be more than enough as right now I'm at 6W on
2m, my 440 rig is 70, the 220 rig will be 100 and I'll be getting a 2m
Mocom at 35W in the next couple of days.
Thanks,
DAve
--
========================================================================
David Cooley N5XMT                  Packet: N5XMT@W4RAL.#RTP.NC.USA.NOAM
Internet: [e-mail]    And Web: http://www.ipass.net/~cooldave/
Sponges grow in the ocean... Wonder how deep it would be if they didn't!
========================================================================


From [e-mail] Thu Jan 02 17:18:34 1997
Newsgroups: rec.radio.amateur.antenna
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From: [e-mail] (Robert E. Garland)
Subject: Re: powerful VHF/UHF antenna
Sender: [e-mail] (news)
Organization: The KD3BJ Usenet BBS
Message-ID: <[e-mail]>
References: <59n2t5$1ff$[e-mail]> <[e-mail]>
X-Nntp-Posting-Host: jupiter.jtan.com
Date: Thu, 26 Dec 1996 01:37:48 GMT
Lines: 45

Mike <[e-mail]> writes:

>Kraig Kolar wrote:
>>
>> I want to buy a very powerful VHF/UHF tv antenna.  The best I've found so f
ar
>> with my limited knowledge is radio shack's VU-210XR with a range of 210 mil
es
>> for VHF and 135 miles for UHF.  It has 58 elements and a boom length of 190
>> inches and it cost 130 dollars.  Can anyone tell me if this would be worth
the
>> money or is something else better?
>>
>> thanks,
>> Kraig
>> [e-mail]


>Kraig,
>I have installed Radio shack, Winegard and the antenna avail at home
>centers. I found it had to believe there would be a difference, but
>there is a big one. The Winegard while more dollars out performs the
>others I put in for customers. I always used the Winegard CS-8200
>uhf/vhf model. It is 177" long 110" wide and does a great job for
>distant stations. You might consider a preamp also.
>Good Luck
>Mike K6YPB

Be advised that a mast-mounted preamp in a plastic enclosure is asking
for trouble.  I once put a broadcast FM station on the air that totally
wiped some TV channels in the local area, especially those distant
channels that required preamplification.  Some mast-mounted preamps were
working with my signal and the other local FM station signal, along with
whatever was in the TV system to wreck reception on a brand new $800 TV
set.  The TV owner could not be convinced that after paying all that
money he did not have the best system in the world.  By the way, both FMs
were operating as designed and licensed.  All those signals interacting
inside the unshielded preamp were having a fine time!

So, when you go looking to pick up weak signals, remember to consider the
effect of stronger signals closer in.


--
     Robert Garland                            NX3S @ N3ACL.PA.USA.NOAM
     Hilltown Township Bucks County               [e-mail]
     Pennsylvania USA                                       Grid FN20ii
                         "Ham Radio is a calling"


From [e-mail] Thu Jan 02 17:18:36 1997
From: [e-mail] (J. Ogando)
Newsgroups: alt.radio.scanner,rec.radio.scanner,rec.radio.amateur.antenna
Subject: Re: Cordless Phone Question
Date: Thu, 26 Dec 1996 01:57:35 GMT
Organization: The Internet Access Company, Inc.
Lines: 44
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Xref: news1.epix.net alt.radio.scanner:43635 rec.radio.scanner:74017 rec.radio.amateur.antenna:33196

On 23 Dec 1996 07:45:16 GMT, [e-mail] (Nafana) wrote:

>[e-mail] wrote:
>[e-mail] (Nafana)writes:
>>>>In article <[e-mail]>, [e-mail] wrote:
>>>>I just recently purchased a 25-chanel cordless phone and was wondering
>>>>how to increase its range.  I was thinking a longer antenna on the base
>>>>unit (It only has a short stubby one now).
>>
>>>>Any suggestions?
>>
>>>Connect it via a impedance matching network to drive a 4CX250 tube. Use
>>>that to drive a 4CX15000C.  (You'll need about 4 amps at 7.5KV).   Come
>>>out of that with a Pi-net to a 4" 50-ohm heliax coax.  Run this up a
>>>tower as high as you can get it- (at least 500-ft) to a 12 bay phased
>>>diapole array.
>>>This should give you about 75 miles.
>>
>>> Glad to help.
>>
>>> -Naf
>
>>I disagree Naf,
>>I still believe he can get further range by mounting the base of the
>>portable phone on a 100 foot tower, and protecting it from the elements.
>>His only outlay will be for the tower, which he can get today for about
>>500 used, as compared to those high powered amplifier tubes you suggest.
>>Get wise man.....
>
>>BJ
>
> Yes, but would he get 75 miles?
>
>Actually I was being a little bit facetious, (no, a whole lot facetious), and

>neither of our suggestions would be legal in the eyes of the FCC.
>
> A much better solution would be to get a 900-Mhz cordless, which will
>inherently have better range and is better in every respect.
>
> -Naf
>


A digital 900MHz is better... than an analog 900MHz. :)


From [e-mail] Thu Jan 02 17:18:37 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Anyone try 1.5 KW into TA 33 Junior beam?
Date: 26 Dec 1996 02:41:38 GMT
Lines: 21
Message-ID: <59sol2$lha$[e-mail]>
References: <[e-mail]>
Reply-To: [e-mail]
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X-Newsreader: IBM NewsReader/2 2.0

In <[e-mail]>, "John
T. Young" <[e-mail]> writes:
>Wondering if anyone has tried loading up a Mosely TA33 Jr. or TA33 Jr WARC
>(this is what I've got) to 1.5 kilowatts PEP SSB. I know they are rated
>for 1.2 kw on ssb and 500 watts on cw, but I'm wondering if there is
>enough tolerance +/- for occaisional full legal output on ssb. I called
>Mosely and they said there is some tolerance but that the amount is
>unpublished and that one should stick to the specs (the expected
>response). Just curious if anyone has tried it. I'm thinking of upgrading
>my amplifier and I'm just anticipating the temptation! I also realize that
>going from 500 watts out (my present amp) to 1.2 or 1.5 kw will not make a
>tremendous difference, but I'm still curious.....many thanks for your
>input. 73 and best of the season to you all. John, K7JY.
>
John,

  Ever see the Eastwood movie when he asks "How lucky do yo feel?" Heck, A
 set of traps aren't that hard to replace, find, or afford, go for it!  Oh, by
 the
 way, that 'tolerance' is dependant on temperature an humidity. Good Luck!
 See you back on that dipole.

                                                     Jim W9LZ


From [e-mail] Thu Jan 02 17:18:38 1997
Newsgroups: rec.radio.amateur.antenna
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From: "Ron Lile" <[e-mail]>
Subject: Re: HELP! 2m conversion
X-Newsreader: Microsoft Internet News 4.70.1155
Sender: [e-mail] (news)
Organization: Tenna Lab
Message-ID: <01bbf2d8$91514220$[e-mail]>
References: <59nsn3$[e-mail]>
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Date: Thu, 26 Dec 1996 02:51:46 GMT
Lines: 24

Eric -- mounting the antennas vertical (horizontal elements) on an
appropriate mast using the same harness and spacing will work just fine.
Assuming that you desire to work SSB/CW, be sure to check the tuning at the
lower end of 2 meteres. Good luck

Ron . K0RL



KC5WCP <[e-mail]> wrote in article
<59nsn3$[e-mail]>...
> I have a Cushcraft a147 22 (2 eleven element beams). came as a
> verticle stacking kit. I want to convert it for horizontal stacking.
> One over the other as opposed to side by side like the verticle kit.
> Can I use the same harness, same spacing?
> Basically can I assemble the kit like it came and turn it on it's
> side, mount it to the mast and it would work fine or do I need to make
> some adjustments?
>
> Many thanks and merry christmas.
> KC5WCP
> Eric
>
>


From [e-mail] Thu Jan 02 17:18:39 1997
Path: news1.epix.net!news3.epix.net!uunet!in3.uu.net!152.163.170.17!newstf01.news.aol.com!audrey01.news.aol.com!not-for-mail
From: [e-mail] (K6bob)
Newsgroups: rec.radio.amateur.antenna
Subject: TapeTenna
Date: 26 Dec 1996 08:09:52 GMT
Organization: AOL http://www.aol.com
Lines: 7
Message-ID: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

I have been stripped of my HF antenna by the Condo Asn board of directors
and need to move indoors for my next antenna location. Does anyone out
there have any experience with the TapeTenna and can I wrap it all around
the walls & ceiling of my 3 BR condo to TX & RX up through 40 Meters?
Will my wife let me get away with that? Your input is needed ASAP!
Bob
K6BOB


From [e-mail] Thu Jan 02 17:18:40 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna,alt.radio.scanner,rec.radio.scanner
Subject: Re: scanner antenna
Date: Thu, 26 Dec 1996 09:01:53 GMT
Organization: Netspace Internet Services
Lines: 26
Message-ID: <59t7fs$[e-mail]>
References: <[e-mail]> <[e-mail]>
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Xref: news1.epix.net rec.radio.amateur.antenna:33201 alt.radio.scanner:43641 rec.radio.scanner:74057

P Tyers <[e-mail]> wrote:

>Aaron Myers wrote:
>>
>I wanted to extend the listining area on my
>> radio as well as my hand held scanner.  I would like an indoor
>> antenna(s) for them but if I must, an outdoor will do.  Does anyone have
>If you can live with an outdoor antenna then a discone is ideal as a
>scanner antenna. Tandy ( your Radio Shack I think) should have something
>suitable. Is a conical shaped antenna topped by a flat section with very
>broad response 30-300 Mhz ?? and some gain which is enhanced by virtue
>of its elevated position. Needs a mast/eave mount.

>--
>P Tyers, Tel. [phone]
>AARnet:        [e-mail]
>CSnet: [e-mail]    HAM: VK3KTS
>MAIL: Telstra Research Laboratories,P.O. Box 249,
>      Clayton,VICTORIA 3168,AUSTRALIG

Grab the Winter 1996 "Poptronix" magazine at your local newsstand. It
shows good plans for a Discone. It is designed to operate over a
frequncy range of 700 to 2000 MHz.

Wiggie



From [e-mail] Thu Jan 02 17:18:41 1997
Path: news1.epix.net!news3.epix.net!uunet!in2.uu.net!205.252.116.190!feed1.news.erols.com!worldnet.att.net!ix.netcom.com!news
From: [e-mail](-=Tony=-)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: TapeTenna
Date: 26 Dec 1996 10:06:16 GMT
Organization: Netcom
Lines: 29
Message-ID: <59timo$[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: sfo-ca27-36.ix.netcom.com
X-NETCOM-Date: Thu Dec 26  2:06:16 AM PST 1996

In <[e-mail]> [e-mail]
(K6bob) writes:
>
>I have been stripped of my HF antenna by the Condo Asn board of
directors
>and need to move indoors for my next antenna location. Does anyone out
>there have any experience with the TapeTenna and can I wrap it all
around
>the walls & ceiling of my 3 BR condo to TX & RX up through 40 Meters?

    Yes, maybe.  Go ahead an try it!

>Will my wife let me get away with that?

    Sorry ....this is in your balliwick.  :)

>Your input is needed ASAP!

    That's all I can offer.

>Bob
>K6BOB

    Where are you located, Bob?  I was in a condo a few years back and
understand a bit (in L.A.).  Finally settled for VHF repeater work
only with indoor antennas which worked well.  So it goes, eh?

    -=Tony=-    W6ANV   San Francisco, CA



From [e-mail] Thu Jan 02 17:18:42 1997
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From: [e-mail] (Jose Antonio Gonzalez)
Newsgroups: rec.radio.amateur.antenna
Subject: Which antenna rotor?
Date: Thu, 26 Dec 1996 12:12:11 GMT
Organization: Lander Internet
Lines: 22
Message-ID: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: ppp1218.lander.es

Hello!

I need a antenna rotator for a FORCE 12 C3 antenna that I am going to buy.
Would it be enough a YAESU G-450-XL? If not, what rotator do you suggest
me?:

1. The YAESU G-800-S/SDX
2. The HY GAIN HAM IV

By the way, I know that the HAM IV has only an input AC voltage (125 VAC or
220 VAC depending of the model), do the YAESU models have BOTH input AC
voltage or there are different models too?.

Please due to my Internet Service Provider losts a lot of posts, if
possible, any comment via e-mail.

Best regards

--
_________________________________________________________________________
Jose Antonio Gonzalez Lorenzo -- [e-mail] -- Amateur Radio: EA2BSN
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


From [e-mail] Thu Jan 02 17:18:43 1997
Newsgroups: rec.radio.amateur.misc,rec.radio.amateur.antenna
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From: [e-mail]
Subject: HELP WITH RFI TO CABLE-CONNECTED TV
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Xref: news1.epix.net rec.radio.amateur.misc:121993 rec.radio.amateur.antenna:33314

my new cushcraft R7000 seems to cuase some internference on my
nieghbor's cable-connected TV on certain bands (17 and 10 so far)
any remedies/advice out there would be appreciated.
john



From [e-mail] Thu Jan 02 17:18:44 1997
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From: [e-mail] (KC5WCP)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: HELP! 2m conversion
Date: Thu, 26 Dec 1996 14:54:12 GMT
Organization: Datasync Internet
Lines: 15
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"Ron Lile" <[e-mail]> wrote:

>Eric -- mounting the antennas vertical (horizontal elements) on an
>appropriate mast using the same harness and spacing will work just fine.
>Assuming that you desire to work SSB/CW, be sure to check the tuning at the
>lower end of 2 meteres. Good luck

>Ron . K0RL

Thank You Ron. And a Happy New Year.

Eric





From [e-mail] Thu Jan 02 17:18:45 1997
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From: "Roger D. Placer" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Veritcal vs. G5RV ???
Date: Thu, 26 Dec 1996 10:01:36 -0500
Organization: Lucent Technologies - Bell Labs
Lines: 62
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References: <[e-mail]> <[e-mail]> <[e-mail]>
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> Yes but my main concern is to keep the HF antenna as modest as
> possible. Its all about compromise I suppose but which is the best
> for the least is my question.

Hi Hugh,

Your point is well taken by moi. I have three HF antennas in my modest
suburban plot, and I too desire a low profile in my neighborhood:

1) Cushcraft R7000 vertical (half-wave radiator; no radials)
2) Full-wave rectangular loop cut for 7 MHz
3) Dipole (bent to 90 degs; parallel to gnd) cut for 3.5 MHz

Despite all of the criticism about how verticals are little more than
tall dummy loads (rubbish), and how they're noisy, inefficient,
etcetera; I have done very well with mine. Plus, I have comparisons with
other antennas at the QTH that support my results. In other words, it's
not one of those "I use a vertical, and it works good [sic]. Buy one."
testimonials.

The R7000 is mounted on a tripod/mast that sits at the edge of my
backyard. Its base is about 12' off the ground. The loop is at 35', the
dipole is at 40'.

If I could put up ONE antenna ONLY that would cover the bands I operate
(80-10, WARC included), I would choose a fullwave horizontal loop cut
for 3.5 MHz. If you have the real estate, I recommend it. It will load
without assistance on 80, 40, 20, and 10; it will load nicely with a
tuner on 30, 17, 15, and 12. It kicks butt.

However, I don't have the right supports or dimensions for an 80m loop.
The 40m loop was enough of a challenge! My antennas are used as follows:

Loop:   40, 20 (10)
Dipole: 80, 17
R7000:  40, 30, 20, 17, 15, (12, 10)

The loop and dipole beat the R7000 on the bands listed for them
(Obviously, 80m is a unique case). On 40 and 20, I constantly switch
between R7000 and loop for RX comparisons. The R7000 is often equal to
the loop, but usually has a bit more QSB. Sometimes, the loop shows
about a 2 S-unit improvement. My TX results so far (limited; I just put
the loop up last week) show little difference in strength to stations
South of me, and 2 S-unit differences to the West. North and East have
not yet been tested. In any case, it seems that the loop performs
somewhat better than the vertical.

However, the vertical gives you 7 bands with very acceptable
performance. I won't bother reading off the DX I've contacted in the
last 6 months during the depths of sunspot despair. That sort of claim
always reeks of the "Yeah, right" factor. Email me and I'll give you
better details. Bottom line for me is that this antenna works on many
bands, has a reasonable footprint, is easy to install and maintain, and
gets out well.

GL es 73 de KA2Z
Roger
==========================================================
Roger D. Placer, KA2Z      Lucent Technologies - Bell Labs
Phone(W) 908.582.3112    Business:       [e-mail]
FAX(W)   908.582.3662    Personal: [e-mail]
==========================================================


From [e-mail] Thu Jan 02 17:18:47 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: ** Transmitting Loop on Mobile: Why not? **
Date: 26 Dec 1996 15:05:36 GMT
Organization: AOL http://www.aol.com
Lines: 28
Message-ID: <[e-mail]>
References: <[e-mail]>
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X-Admin: [e-mail]
X-Newsreader: AOL Offline Reader

In article <[e-mail]>, Murray Kelly
<[e-mail]> writes:

>OK Tom, you don't like loops!

No, I never said that. For receiving, I use three arrays with four phased
loop antennas in each array. I have a small loop on a tower at sixty feet,
and even loop my shoe laces through my shoes.

>W6SAI does but that does raise a question
>in my mind. Why does the loop have to have a round conductor? I've seen
>this before stated baldly but never seen an explanation.

By round I assume you mean the conductor itself. Rapidly changing currents
move to the outside edges of a flat conductor. The inner area of the flat
conductor carries little current, and so it might as well no be there at
all. That increases the resistance and the loss.

There is no magic, a loop is just another kind of antenna. In some
applications it is better than a vertical, in some worse. It just all
depends on the goals and limitations.
But one thing for sure, the largest radiation effects occur in a small
antenna when the current area of an antenna is as straight and as long as
possible. The small loop does not satisfy that requirement, that's why
current has to be so high to radiate the same power as a dipole of the
same spatial area would.

73 Tom


From [e-mail] Thu Jan 02 17:18:48 1997
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From: Mike Watson <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: MFJ 1798 Vertical Antenna
Date: Thu, 26 Dec 1996 09:46:23 -0600
Organization: SkyNET Corporation
Lines: 28
Message-ID: <[e-mail]>
References: <59ejfk$[e-mail]>
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Julian Rhinehart wrote:
>
> Does anyone have information on the MFJ 1798 Vertical Antenna, 80M-2M?
>
> Tnx, Julian, KD7QY
>
> Julian Rhinehart
> 1127 Seno Court
> Boulder City, NV 89005
> [phone]
> [phone] (fax)
> [e-mail]

I can quote from their catalog:
1.  Ten bands: 80/75,40,30,20,17,15,12,10,6,2 meters
2.  1500 Watts PEP
3.  Top loaded. (Biigg capacity hat setup!)
4.  Self-supporting ~20ft. tall.
5.  "Full size" 1/4 wave radiators on 20M -> 2M, except on 6M is 3/4
wave.
6.  "No ground or radials needed."
7.  One year warranty/

Note:  Quotes are verbatum from catalog.  I have not used this antenna
therefore, no endorsement is implied or given.

Mike Watson
WB0IKT


From [e-mail] Thu Jan 02 17:18:48 1997
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From: Jake Brodsky <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Passive Repeater???
Date: Thu, 26 Dec 1996 10:50:19 -0500
Organization: Utter Chaos
Lines: 16
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
Reply-To: [e-mail]
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Just one note:

When calculating path loss of passive repeaters, you add the
gains of both antennas at the repeater site, but you also have
to include the path loss from the transmitter to the repeater
and then the path loss from the repeater to the receiver.

IOW: Unless you're dealing with microwave antennas, where
antenna gains of 30 dBi or more are common, you may need a bit
more power and a bit more sensitivity than usual to get the
link to work.

Jake Brodsky, mailto:[e-mail]
PP-ASEL IA, Cessna Cardinal N30946, Based @ MD24
Amateur Radio Station AB3A
"MY kindness isn't random, nor my acts of beauty senseless."


From [e-mail] Thu Jan 02 17:18:49 1997
Path: news1.epix.net!news3.epix.net!uunet!in2.uu.net!141.211.63.150!newsxfer2.itd.umich.edu!cliffs.rs.itd.umich.edu!portc01.blue.aol.com!audrey01.news.aol.com!not-for-mail
From: [e-mail] (JWALLG)
Newsgroups: rec.radio.amateur.antenna
Subject: TOWER HELP IN DALLAS
Date: 26 Dec 1996 17:59:10 GMT
Organization: AOL http://www.aol.com
Lines: 6
Message-ID: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

I NEED SOMEONE TO INSTALL 4 SECTIONS OF ROHN 25G, ROTOR AND ANTENNAS AT MY
HOME. I AM DISABLED IN A WHEELCHAIR AND LOVE HAM RADIO. THE FIRST 10FT
SECTION IS ALREADY IN THE GROUND IN CEMENT SO NO DIGGING REQUIRED. I WILL
PAY FOR YOUR SERVICES. I LIVE IN LAVON TX 6MI NORTH OF ROCKWALL OR 18MI NE
OF GARLAND.IF SOMEONE HAS TOWER EXPERENCE AND CAN HELP ME PLEASE EMAIL ME
AT [e-mail].


From [e-mail] Thu Jan 02 17:18:50 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!feed1.news.erols.com!news.idt.net!news.stealth.net!newsfeed.uk.ibm.net!news-m01.ny.us.ibm.net!news-s01.ny.us.ibm.net!not-for-mail
From: [e-mail] (Luiz Marcondes)
Newsgroups: rec.radio.amateur.antenna,sci.electronics.misc
Subject: EM hell?
Date: Thu, 26 Dec 1996 18:00:41 GMT
Lines: 14
Message-ID: <32c3b801.4651861@165.87.194.249>
Reply-To: [e-mail]
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Xref: news1.epix.net rec.radio.amateur.antenna:33212 sci.electronics.misc:19171

Hi,

About a mile from my home there are four TV (channels 2, 4, 9 and 14) and
several broadcast FM transmitters, all working with powers in the 100+ Kw
ERP class.
Radio reception is a nightmare, mostly (I think) because of IM products
in overloaded front end stages. In most bands there are several regions
at a spacing of about 100Khz, each 30-40 Khz wide with a harsh buzz
stronger than anything else.
Maybe a bandpass filter could alleviate the problem, but I don't know how
much out-of-band attenuation I'll need, any ideas?
73

Luiz


From [e-mail] Thu Jan 02 17:18:51 1997
Newsgroups: rec.radio.amateur.antenna
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!news.asu.edu!ennfs.eas.asu.edu!ennews!enuxsa.eas.asu.edu!vrenios
From: [e-mail] (Alexander Vrenios)
Subject: Re: EM hell?
Message-ID: <[e-mail]>
Sender: [e-mail] (USENET News System)
Organization: Arizona State University, Tempe, AZ
Date: Thu, 26 Dec 1996 18:38:58 GMT
References: <32c3b801.4651861@165.87.194.249>
X-Nntp-Posting-Host: enuxsa.eas.asu.edu
Lines: 29

   I heard about a ham that solved a (much simpler than your) out-of-band
interference problem by using a spectrum analyzer to get the frequencies
he needed to suppress. Then he cut a single piece of coax for each one,
and coiled them up under his operating position. Each piece was a shorted
half-wave (or something like that) tee'ed into his xcvr connector, effectively
shorting out signals at those exact frequencies. This sounds like a good way
to suppress transmitted harmonics, as well.

   Again, I just heard about it - it sounds like it ought to work. Best of
luck and 73.

In article <32c3b801.4651861@165.87.194.249>,
Luiz Marcondes <[e-mail]> wrote:
>Hi,
>
>About a mile from my home there are four TV (channels 2, 4, 9 and 14) and
>several broadcast FM transmitters, all working with powers in the 100+ Kw
>ERP class.
>Radio reception is a nightmare, mostly (I think) because of IM products
>in overloaded front end stages. In most bands there are several regions
>at a spacing of about 100Khz, each 30-40 Khz wide with a harsh buzz
>stronger than anything else.
>Maybe a bandpass filter could alleviate the problem, but I don't know how
>much out-of-band attenuation I'll need, any ideas?
>73
>
>Luiz




From [e-mail] Thu Jan 02 17:18:52 1997
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From: Michael <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Looking for wr90 wave guide for 10ghz and a Horn with gain greater than 17db
Date: 26 Dec 1996 18:46:38 GMT
Organization: AT&T WorldNet Services
Lines: 5
Message-ID: <59uh6e$[e-mail]>
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X-Mailer: Mozilla 1.22ATT (Windows; U; 16bit)
To: all

Hello All
  I am looking for wr90 wave guide flexable and non-flexable also a horn
for 10ghz (wr90 flange) with a gain greater than 17db.
Thanks Mike WB2GLW



From [e-mail] Thu Jan 02 17:18:53 1997
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From: [e-mail] (Patrick Croft)
Newsgroups: rec.radio.amateur.antenna
Subject: Need Rohn 45/55 Parts
Date: 26 Dec 1996 18:52:49 GMT
Organization: IQuest Network Services
Lines: 7
Message-ID: <59uhn1$[e-mail]>
NNTP-Posting-Host: ind-0005-16.iquest.net
X-Newsreader: News Xpress Version 1.0 Beta #4

Getting things planned for spring tower work! I need some sections of 45 or 55
 Rohn.
Also, anyone in the midwest with a spare length of 2" chromoly 4120 they'd ped
dle?
Let me know what, where, and how much!

Happy New Year!

WB9IQI



From [e-mail] Thu Jan 02 17:18:54 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!arclight.uoregon.edu!newsfeeds.sol.net!newspump.sol.net!howland.erols.net!portc02.blue.aol.com!audrey01.news.aol.com!not-for-mail
From: [e-mail] (Yuli01)
Newsgroups: rec.radio.amateur.antenna
Subject: 2.4 GHz and 5.6 GHz Omni Antennas
Date: 26 Dec 1996 19:21:15 GMT
Organization: AOL http://www.aol.com
Lines: 10
Message-ID: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

I am looking to purchase a number of 2.4 GHz and 5.6 GHz omnidirectional
antennas with gains of 7dBi, 11dBi and higher.  Polarization - either
vertial or horizontal.  I would like to have several sources for
comparison, if possible.  Does anyone have recommendations / suggestions
as to where I can find these antennas ?  Also, any idea what price range
am I looking at ?

Please respond to [e-mail], or post to the newsgroup.

Thank you !


From [e-mail] Thu Jan 02 17:18:55 1997
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From: "K2II" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Yaesu G-5400B alt/az rotor wanted.
Date: 26 Dec 1996 20:16:10 GMT
Organization: digitalNation
Lines: 4
Message-ID: <01bbf368$e0d4a040$c95ca7cd@default>
NNTP-Posting-Host: tcp201.spec.net
X-Newsreader: Microsoft Internet News 4.70.1155

Wanted: Yaesu G-5400B alt/azimuth rotor. Must be in excellent condition.
E-mail [e-mail]
Tnx, Larry  :)



From [e-mail] Thu Jan 02 17:18:56 1997
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From: [e-mail]  (Frank Reid)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Passive Repeater???
Date: Thu, 26 Dec 1996  15:46 EST
Organization: Indiana University
Lines: 24
Distribution: world
Message-ID: <19961226154637.reid@frank_reid.electronics.indiana.edu>
References: <[e-mail]>  <[e-mail]>
NNTP-Posting-Host: frank_reid.electronics.indiana.edu
X-Newsreader: FTPNuz (DOS) v1.0

 Anikan wrote:
>
> Hello all, I am looking for information on a Passive Repeater. As far as i
> understand it, it is notheing more than two antennas hooked up by a
> certain length of feedline. No gain, but one would be useful to get a
> signal into an area (or over an obstacle) without the regular equipment. I
> would like to set one up to allow regular repeater access from a dead spot
> in town.  Any help would be much appreciated.
>
> larry nixon VE7LFN

I have used 2m passive repeaters in cave rescue, for enhancing the range
of radios at the bottoms of entrance pits:  A length of coax with antennas
on the ends hangs in the pit.  The upper antenna is suspended above the edge.
The lower antenna should be circularly-polarized, which helps eliminate
dead spots:  Mine is a "turnstile" from the ARRL Handbook chapter on
satellites, with elements made from flexible steel measuring-tape.
Typical performance:  Surface range from bottom of 80-foot pit with 2-foot-
diameter opening is 30 feet without passive repeater, 500 feet with.
The coax is 30 feet long.

--

Frank     [e-mail]     W9MKV     NSS 9086


From [e-mail] Thu Jan 02 17:18:57 1997
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From: [e-mail] (PoorBoy)
Newsgroups: rec.radio.amateur.antenna
Subject: WTB: "Reflections" by Maxwell
Date: Thu, 26 Dec 1996 22:18:57 GMT
Organization: CampusMCI
Lines: 8
Message-ID: <[e-mail]>
NNTP-Posting-Host: s27-pm01.pcc-uky.campus.mci.net
X-Newsreader: Forte Agent .99e/32.201

I would like to buy a copy of Maxwell's book "Reflections" if anyone
has a copy they don't need or use anymore. New or used okay.

73,  KC4O  Roy Boggs

[e-mail] or
[e-mail]



From [e-mail] Thu Jan 02 17:18:58 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.idt.net!www.nntp.primenet.com!nntp.primenet.com!ix.netcom.com!netcom.net.uk!news-lond.gsl.net!news.gsl.net!news-paris.gsl.net!news.gsl.net!rain.fr!globalip.ch!news.worldcom.ch!portge31.worldcom.ch!user
From: [e-mail] (Anselmo Stiffan)
Newsgroups: rec.radio.amateur.antenna
Subject: HF magnetic loop
Followup-To: rec.radio.amateur.antenna
Date: Thu, 26 Dec 1996 22:32:08 +0000
Organization: WorldCom
Lines: 8
Message-ID: <[e-mail]>
NNTP-Posting-Host: portge31.worldcom.ch

Could anyone who has experienced homebrew or MFJ...AEA magnetic loops give
me his comments and impressions. Literature promises great performances but
it does not look that many hams are using them. Why? Who can tell me the
drawbacks?

I intend initially to build one. Somebody did it already?

Thanks for the help. Anselmo (soon IZxxx).


From [e-mail] Thu Jan 02 17:18:58 1997
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From: [e-mail] (Doug D)
Newsgroups: rec.radio.amateur.antenna
Subject: 2 Meter Antenna
Date: Fri, 27 Dec 1996 00:10:18 GMT
Organization: Northern Research
Lines: 4
Distribution: World
Message-ID: <32c3135e.12740574@199.190.65.4>
Reply-To: [e-mail]
NNTP-Posting-Host: s15.lrbcg.com
X-Newsreader: Forte Free Agent 1.1/32.230

Any reason I can't use #8 aluminum ground wire for a 2 meter antenna?
I want to build in into a section of 1-1/2" PVC pipe.

Doug


From [e-mail] Thu Jan 02 17:18:59 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.net!www.nntp.primenet.com!nntp.primenet.com!feed1.news.erols.com!news.bbnplanet.com!cpk-news-hub1.bbnplanet.com!newsfeed.internetmci.com!ionews.ionet.net!usenet
From: Hank Blackstock <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: WTB: "Reflections" by Maxwell
Date: Thu, 26 Dec 1996 18:33:33 -0600
Organization: Internet Oklahoma
Lines: 15
Message-ID: <[e-mail]>
References: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: pri4-29.ionet.net
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
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To: PoorBoy <[e-mail]>

PoorBoy wrote:
>
> I would like to buy a copy of Maxwell's book "Reflections" if anyone
> has a copy they don't need or use anymore. New or used okay.
>
> 73,  KC4O  Roy Boggs
>
> [e-mail] or
> [e-mail]


It is an ARRL publication and should be available from them. An
excellent book by the way.

Hank W5HJ


From [e-mail] Thu Jan 02 17:19:00 1997
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From: Ruth & Dick Archer <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.shortwave
Subject: Re: Amplified Indoor Antenna
Date: Thu, 26 Dec 1996 18:41:25 -0600
Organization: Texas Networking, Inc.
Lines: 51
Message-ID: <[e-mail]>
References: <01bbebc9$33fb9460$8d4292cf@knight>
Reply-To: [e-mail]
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Xref: news1.epix.net rec.radio.amateur.antenna:33215 rec.radio.shortwave:91167

Markus Kafurke wrote:
>
> Hi,
>
> I want to extend my listening range, and therefore want to get an amplified
> antenna. I was thinking about buying either something inexpensive like the
> Radio Shack 20-280 or something halfway decent from a manufacturer like
> Sony of MFJ.
> Does anybody have any experience with these antennas? I would appreciate
> any advice on performance and if the equipment is worth the money.
>
> Bye, mk.
I tried several active antennas, as I'm in Western North America
and shortwave signals are usually very weak.  My results have
varied from feeling they are worse than useless (boosting noise
more than the damn signal) to merely being disappointed (helping
a little bit, but I still can't make out the audio due to insufficient
gain.)

Everything I've tried has required a fair-sized external antenna
to work.

The commercial best setup I've tried so far is the Kiwa model,
with a BCB reject filter.  If you're in non-weak reception area you
might be very happy with it.
Otherwise, I'd recommend a big outdoor antenna
with or without the Kiwa attached.

IMHO the important features of an active antenna are very low noise,
very low distortion, and gain that's adjustable to suit a wide
variety of listening locations.

I've designed a "cost is no object" active antenna which satisfies the
first two requirements.  It has three GaAsP MOSFET stages, and
provides enough gain to use a 6" whip in California and listen
to the stronger broadcasts very well, outperforming everything else
I've tried in terms of actually making out what is broadcast.
In this regard it's superior to anything I could have bought.
However, on the down side it probably has way too much gain for most
areas and sucks up batteries rather quickly (50mA drain at 6 volts),
which was a requirement to avoid overload of strong signals with
so much broadband gain.

I'm getting ready to revisit the design to add variable gain and
perhaps a NiCad charger/batteries to make it more practical.

Moral support, or more information, to:

[e-mail]

mailto:[e-mail]


From [e-mail] Thu Jan 02 17:19:01 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.idt.net!feed1.news.erols.com!tezcat!gail.ripco.com!kwk
From: [e-mail] (Kraig Kolar)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: powerful VHF/UHF antenna
Date: 27 Dec 1996 00:44:09 GMT
Organization: Ripco Communications Inc.
Lines: 56
Message-ID: <59v64p$4ds$[e-mail]>
References: <59n2t5$1ff$[e-mail]> <[e-mail]> <[e-mail]>
NNTP-Posting-Host: golden.ripco.com
X-Newsreader: TIN [version 1.2 PL2]

Robert E. Garland ([e-mail]) wrote:
: Mike <[e-mail]> writes:

: >Kraig Kolar wrote:
: >>
: >> I want to buy a very powerful VHF/UHF tv antenna.  The best I've found so
 far
: >> with my limited knowledge is radio shack's VU-210XR with a range of 210 m
iles
: >> for VHF and 135 miles for UHF.  It has 58 elements and a boom length of 1
90
: >> inches and it cost 130 dollars.  Can anyone tell me if this would be wort
h the
: >> money or is something else better?
: >>
: >> thanks,
: >> Kraig
: >> [e-mail]


: >Kraig,
: >I have installed Radio shack, Winegard and the antenna avail at home
: >centers. I found it had to believe there would be a difference, but
: >there is a big one. The Winegard while more dollars out performs the
: >others I put in for customers. I always used the Winegard CS-8200
: >uhf/vhf model. It is 177" long 110" wide and does a great job for
: >distant stations. You might consider a preamp also.
: >Good Luck
: >Mike K6YPB

: Be advised that a mast-mounted preamp in a plastic enclosure is asking
: for trouble.  I once put a broadcast FM station on the air that totally
: wiped some TV channels in the local area, especially those distant
: channels that required preamplification.  Some mast-mounted preamps were
: working with my signal and the other local FM station signal, along with
: whatever was in the TV system to wreck reception on a brand new $800 TV
: set.  The TV owner could not be convinced that after paying all that
: money he did not have the best system in the world.  By the way, both FMs
: were operating as designed and licensed.  All those signals interacting
: inside the unshielded preamp were having a fine time!

: So, when you go looking to pick up weak signals, remember to consider the
: effect of stronger signals closer in.


: --
:      Robert Garland                            NX3S @ N3ACL.PA.USA.NOAM
:      Hilltown Township Bucks County               [e-mail]
:      Pennsylvania USA                                       Grid FN20ii


:                          "Ham Radio is a calling"

Thanks for the replys!!  Does anyone know the vhf and uhf ranges for the
winegard cs-8200?   Also, what about the cost?


thanks,
[e-mail]



From [e-mail] Thu Jan 02 17:19:02 1997
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From: [e-mail] (Peter Chow)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: WTB: "Reflections" by Maxwell
Date: 27 Dec 1996 01:03:00 GMT
Organization: cisco Systems, Incorporated
Lines: 25
Message-ID: <59v784$[e-mail]>
References: <[e-mail]> <[e-mail]>
NNTP-Posting-Host: shad.cisco.com
X-Newsreader: TIN [version 1.2 PL2]

I went through my November issue of QST and believe that "Reflections"
is not available thru ARRL. BTW, I would like to get a copy too.
Good luck.


73,
KQ6JH


Hank Blackstock ([e-mail]) wrote:
: PoorBoy wrote:
: >
: > I would like to buy a copy of Maxwell's book "Reflections" if anyone
: > has a copy they don't need or use anymore. New or used okay.
: >
: > 73,  KC4O  Roy Boggs
: >
: > [e-mail] or
: > [e-mail]


: It is an ARRL publication and should be available from them. An
: excellent book by the way.

: Hank W5HJ


From [e-mail] Thu Jan 02 17:19:03 1997
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From: [e-mail] (K4OJ)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Need Rohn 45/55 Parts
Date: 27 Dec 1996 01:37:02 GMT
Organization: AOL http://www.aol.com
Lines: 6
Message-ID: <[e-mail]>
References: <59uhn1$[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

I also am looking for #55 straight sections and a BPC55G flat base, I live
in FL

K4OJ

[e-mail]


From [e-mail] Thu Jan 02 17:19:04 1997
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From: Chuck Hallett W7LDS <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Verticals and  Dipoles
Date: Thu, 26 Dec 1996 19:53:21 -0600
Organization: Exec-PC BBS Internet - Milwaukee, WI
Lines: 17
Message-ID: <[e-mail]>
References: <[e-mail]>
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Martin Ellis wrote:
>
> There is a thread concerning multiband verticals, and performance
> comparisons with dipoles and other simple antennas.
  <snip>
> UTC Date/Time   Station        Antenna
> Nov 17, 1996
> 2315z           KK5NC          GAP Vertical- New Mexico
  <snip>
> Overall, I think that stations with multiband verticals are
> fairly represented amoung the stations we work on 10m, and would
> appear to be ahead of dipoles.

Can anyone direct us to construction details of the "GAP" style of
vertical?  I'd like to try my hand at building one, or at least scoping
the project out to see if I can come in under the $300 to $400 price of
the commercial model!


From [e-mail] Thu Jan 02 17:19:05 1997
Path: news1.epix.net!news3.epix.net!uunet!in2.uu.net!204.71.0.48!newsfeed.internetmci.com!ionews.ionet.net!usenet
From: Hank Blackstock <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: WTB: "Reflections" by Maxwell
Date: Thu, 26 Dec 1996 19:56:22 -0600
Organization: Internet Oklahoma
Lines: 15
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]> <59v784$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: pri8-35.ionet.net
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To: Peter Chow <[e-mail]>

Peter Chow wrote:
>
> I went through my November issue of QST and believe that "Reflections"
> is not available thru ARRL. BTW, I would like to get a copy too.
> Good luck.
>

I checked the ARRL web page and sure enough it is not shown. I guess it
is out of print. That is a shame. Maybe they have some copies, but are
not showing it in their ads. My copy says that it is publication 119 of
the Radio Amateur's Library, published by the League. Maybe that would
help in ordering it. Sorry, but I will never give up my copy.


73 Hank W5HJ


From [e-mail] Thu Jan 02 17:19:06 1997
Newsgroups: rec.radio.amateur.antenna
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!news.sprintlink.net!news-peer.sprintlink.net!news.sprintlink.net!news-hub.sprintlink.net!news.sprintlink.net!news-dc-9.sprintlink.net!eskimo!news
From: [e-mail] (Don Christine)
Subject: Flat top antenna?
X-Nntp-Posting-Host: dbchris.ndip.eskimo.net
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Date: Fri, 27 Dec 1996 01:56:57 GMT
Lines: 9

Hello,

Can anyone tell me what a flat top antenna is?

Please respond via email at [e-mail].

Thanks in advance,
Don  W7YT



From [e-mail] Thu Jan 02 17:19:06 1997
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From: Wendy and Clark Ackison <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: simple hf receiving antenna?
Date: Thu, 26 Dec 1996 21:45:32 -0500
Organization: Wendy Wassink Ackison Illustration
Lines: 14
Message-ID: <[e-mail]>
References: <[e-mail]>
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Eric Oyen wrote:
>
> I would like to build a simple verticla antenna that would give me
> decent response over the 1.5 - 30 Mhz spectrum for short wave listening.
> I will be moving into an apartment in February and want something that
> will work well, be small in size and not look too ugly.
>
> I have checked the ARRL antenna handbook, but nothing in there even
> comes close to what I need. any reasonable suggestions would be helpful.
>
> Eric <n7zzt>
Eric, there are too many unknowns to come up with an answer... do you
plan to mount it on a deck or inside... broadcast or weak-signal... how
small must it be?  Reply via e-mail or here


From [e-mail] Thu Jan 02 17:19:07 1997
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From: Wendy and Clark Ackison <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: RE: Vertical vs G5RV
Date: Thu, 26 Dec 1996 21:57:19 -0500
Organization: Wendy Wassink Ackison Illustration
Lines: 6
Message-ID: <[e-mail]>
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Hugh, The ground mounted vertical is no good anywhere!  Go with whatever
you can get in the air... A vertical high in the air is good for 20-10m
dx.  On 40 and 80, a G5RV is better than the vertical in the air because
these bands are not primarily dx bands... the ground mounted vertical is
just too lossy without extreme measures being taken.  For light duty use
everywhere, I'd have to go with the G5RV.


From [e-mail] Thu Jan 02 17:19:08 1997
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From: "Vince" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Anyone put a 440 antenna on cell tower?
Date: 27 Dec 1996 03:43:09 GMT
Organization: Imperium Internet
Lines: 12
Message-ID: <01bbf3a9$40e20f00$[e-mail]>
NNTP-Posting-Host: akron151.imperium.net
X-Newsreader: Microsoft Internet News 4.70.1155

I am looking for input on location of an omnidirectional antenna on the
platform of a cell tower.  How far above the structure should the antenna
be mounted to avoid interference.  How far away from any vertical metal
(15' lightning rod) should the antenna be to avoid
directivity/reflectivity.

Does anyone have any experience with the Diamond X-200A.  Durability,
lightning, gain, etc.  I am limited to an antenna height and mast of about
10' to stay under the lightning rod shadow.

Thanks



From [e-mail] Thu Jan 02 17:19:09 1997
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From: [e-mail] (Dick Flanagan)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: WTB: "Reflections" by Maxwell
Date: Thu, 26 Dec 1996 20:17:56 -0800
Organization: Libelle Productions, Inc., Minden, Nevada USA
Lines: 8
Distribution: world
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]> <59v784$[e-mail]>
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In article <59v784$[e-mail]>, [e-mail] (Peter Chow) wrote
:

>I went through my November issue of QST and believe that "Reflections"
>is not available thru ARRL. BTW, I would like to get a copy too.

So would I!
--
Dick Flanagan W6OLD CFII Minden, Nevada


From [e-mail] Thu Jan 02 17:19:10 1997
Path: news1.epix.net!news3.epix.net!uunet!in3.uu.net!206.55.3.16!news2.mnsinc.com!news1.mnsinc.com!usenet
From: John P Smith <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Need help matching a Beverage!!!
Date: 27 Dec 1996 04:26:56 GMT
Organization: Monumental Network Systems
Lines: 19
Distribution: inet
Message-ID: <59vj6g$[e-mail]>
NNTP-Posting-Host: ki4ro.mnsinc.com

[e-mail] (Mike Kraml) writes: > Hello folks:
>    I have run a wavelength beverage for 80 meters.  Its terminated with 2-1k

> carbon resisters in parallel, with some very short (4 feet, I know, lame)
> ground radials and a 4-foot ground rod.  Anyway, I currently have the antenn
a
> connecting to a short run of coax with the ground of the coax going to an 8
> foot ground rod.  I am told however, one should "match" the antenna to the
> coax, via some type of matching xformer.  I called my local amateur supply,
> they have nothing (6:1 balun, etc).  I am using this antenna only for receiv
e.
>  Is there an easy way to match this thing?  Any help would be appreciated,
> thanks, Mike... - WQ0N
>
Hi Mike,
     I just wound my own using some transformer wire on a ferrite core;
its not perfect I'm sure, but works okay for me.

73
John KI4RO
http://www.mnsinc.com/ki4ro
[e-mail]


From [e-mail] Thu Jan 02 17:19:11 1997
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From: [e-mail] (Gary V. Deutschmann, Sr.)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: TapeTenna
Date: Fri, 27 Dec 1996 05:11:02 GMT
Organization: Inlink
Lines: 33
Message-ID: <59vm7t$nfq$[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: pm01014.inlink.com
X-Newsreader: Forte Free Agent 1.0.82

Hi Bob

Lot of variables, but I can offer a couple of pointers.

Tape-Tenna's work great in that situation, although not perfect by any
stretch of the immagination.

For small antennas, use copper foil tape, available from most stained
glass supply places, that way you can solder to it, make coax
connections, etc.

If you place it on the wall at the ceiling or on the ceiling itself,
it can be painted over quite easily and unnoticed.

You can also use magnet wire, even more invisible and cover it with a
very fine bead of caulk, totally invisible.

Late some night, no moon, climb up on the roof and hide some dipoles
under the shingles, feed the coax down the downspouts.

If you have exposed cable TV wires, you can also hide dipoles running
parallel with the cable wires.

Try gamma matching a tree!  Balcony railing, or even the gutters.

Where there's a will, there's a way, Hi Hi.....

Touch lamps love 80 meter CW!

TTUL - 73+ de Gary - KG0ZP





From [e-mail] Thu Jan 02 17:19:12 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!news.mindspring.com!usenet
From: [e-mail] (Dudley Chapman)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: ** Transmitting Loop on Mobile: Why not? **
Date: Fri, 27 Dec 1996 05:23:00 GMT
Organization: MindSpring Enterprises, Inc.
Lines: 27
Message-ID: <59vmbo$[e-mail]>
References: <[e-mail]> <5952bb$[e-mail]> <5991ev$[e-mail]> <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: ip218.akron2.oh.pub-ip.psi.net
X-Server-Date: 27 Dec 1996 05:20:56 GMT
X-Newsreader: Forte Free Agent 1.0.82

Hank Blackstock <[e-mail]> wrote:

>[e-mail] wrote:
>>
>> Dudley has a point. I'd be concerned with the induced RF into the
>> car's electronic igniton control system...
>> It could be a very expensive experiment - The CPUs cost $10's to 1000+
>> still - tell me how it works if you try it.
>>


>Is there not current in the car with a normal mobile antenna?

>73 Hank W5HJ

Hank,
    Yes indeed.  You will always have some current induced in the body
of the car from an HF mobile antenna.  However, the currents in a
short transmitting loop are fierce.  Its Q is incredibly high,
therefore it will couple heavily to the car metal.  Consider that the
feedpoint impedance is less than 0.01 ohms.  With that, the current
would be I = SQRT(P/Z).  Thats 100 Amps at 100 Watts. That is why the
loops are always made out of copper pipe, or some other very thick
conductor.

Dudley



From [e-mail] Thu Jan 02 17:19:13 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!news.mindspring.com!usenet
From: [e-mail] (Dudley Chapman)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Difference between mobile and regular antennas?
Date: Fri, 27 Dec 1996 05:31:34 GMT
Organization: MindSpring Enterprises, Inc.
Lines: 26
Message-ID: <59vmqp$[e-mail]>
References: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: ip218.akron2.oh.pub-ip.psi.net
X-Server-Date: 27 Dec 1996 05:28:57 GMT
X-Newsreader: Forte Free Agent 1.0.82

"Brian C. Dolan" <[e-mail]> wrote:

>What makes a mobile antenna different from a regular (fixed base)
>antenna? What's required in order to use a mobile antenna in a fixed
>environment?

>Thanks....

>Brian

Brian,
    Mobile antennas are not as good as well constructed full size
fixed antennas, because compromises have been made to make them small.
However, if you have severe space limitations, a mobile antenna can do
the job at a fixed location.  For HF, people almost universally use a
mobile short vertical.  What is not obvious is that the car is
providinig a high degree of coupling to the ground under it, so the
vertical works ok.  When you try to use an HF mobile vertical on the
patio railing of a condo, you run into the problem where you do not
have good coupling to the ground.  However, it is still worth a try.
    One way around the problem is to put two mobile verticals together
to form a dipole.  Apartment dwellers (we used to call them "cliff
dwellers") have had reasonable success with this.

Dudley



From [e-mail] Thu Jan 02 17:19:14 1997
Path: news1.epix.net!news3.epix.net!uunet!in1.uu.net!169.132.11.200!news.idt.net!www.nntp.primenet.com!nntp.primenet.com!news.bbnplanet.com!su-news-hub1.bbnplanet.com!news.pbi.net!news.pacbell.net!usenet
From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: HTX202 & 404Antennas
Date: Thu, 26 Dec 1996 21:43:00 -0800
Organization: A customer of Pacific Bell Internet Services
Lines: 3
Message-ID: <[e-mail]>
NNTP-Posting-Host: ppp-207-104-173-83.scrm01.pacbell.net
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X-Mailer: Mozilla 2.01E-PBXE  (Win16; I)

Are the antennas for the HTX 202 and 404 the exact same part?  Was told
the antennas for these two radios were interchangeable. Doesn't make
sense?


From [e-mail] Thu Jan 02 17:19:15 1997
Path: news1.epix.net!news3.epix.net!uunet!in3.uu.net!205.252.116.190!feed1.news.erols.com!news.ecn.uoknor.edu!munnari.OZ.AU!ihnp4.ucsd.edu!news1.ucsd.edu!news-mail-gateway
From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Ham-Ant Digest V96 #922
Date: 27 Dec 96 05:44:18 GMT
Organization: ucsd usenet gateway
Lines: 1
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]




From [e-mail] Thu Jan 02 17:19:16 1997
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From: [e-mail] (Dudley Chapman)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: baluns, longwires, etc.
Date: Fri, 27 Dec 1996 05:45:42 GMT
Organization: MindSpring Enterprises, Inc.
Lines: 58
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References: <[e-mail]>
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Tore Stabell Kuloe <[e-mail]> wrote:

>Hi out there in radio land!

>Sorry to bother you, people in this newsgroup seem to have experienced a
>lot in your time, so I'll be rude enough to ask:
>1)If I use a dipole with a balun in the feedpoint an coax in to a 50ohm
>input, will it be a gig improvement over a longwire?
>2) Is the balun supposed to be a 1:1 balun (is a dipole 50 ohms
>exaxt...?)
>3)As I listen to aircraft communications on several bands and will have
>a problem of choosing the lenght of the dipole, will a T2FD-antenne be a
>good point?

>(more here)
>http://swl.sds.se/antenn/t2design.html
>http://swl.sds.se/antenn/t2fd.html

>Merry christmas and many questions from

>the notorious asker
>Tore
>--

>Tore Stabell Kuloe  (Kul°)
>[e-mail]
>Bjoernemyr terrasse 20
>N-1453 Bjoernemyr
>NORGE - NORWAY

Tore,
    Your questions are welcome here.  I can answer some of them.

1) The pattern and gain of a longwire is dependent on its length and
its configuration.  So, it is possible that in some directions, a long
wire would work better than the dipole.  In other directions, it would
not compare to the dipole.

2) If you use a dipole at its resonant frequency, its impedance will
be resistive, and it will be somewhere between 40 and 80 ohms,
depending on how high it is off the ground.  In any case, a 1:1
current balun (not a voltage balun) will make your results more
consistent.  The reason is that without a balun the outside shield of
the coax becomes part of the antenna.  This makes it hard to trim the
antenna to resonance for some lenghs of coax.

3) If you use several bands, you will have trouble with a single
dipole and a balun.  A longwire or a doublet fed with open wire line
and a balanced tuner would be better.  I am not familiar with the
t2fd, but if it claims to be a multiband antenna for swl'ing, it might
be a more convenient choice.



Good luck,

Dudley



From [e-mail] Thu Jan 02 17:19:17 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Ham-Ant Digest V96 #922 omni  antenna
Date: 27 Dec 96 05:50:14 GMT
Organization: ucsd usenet gateway
Lines: 8
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]

You might try to find some cubic autotape, motorola mini ranger, racal micro-f
ix
antennas or similar microwave ranging systems. Im not sure of the freq. I thin
k
they may be in the bands u want.
E-mail and I'll look it up next week.
73
spencer
[e-mail]



From [e-mail] Thu Jan 02 17:19:18 1997
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From: [e-mail] (Dudley Chapman)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: HF magnetic loop
Date: Fri, 27 Dec 1996 06:03:03 GMT
Organization: MindSpring Enterprises, Inc.
Lines: 27
Message-ID: <59vom2$[e-mail]>
References: <[e-mail]>
Reply-To: [e-mail]
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[e-mail] (Anselmo Stiffan) wrote:

>Could anyone who has experienced homebrew or MFJ...AEA magnetic loops give
>me his comments and impressions. Literature promises great performances but
>it does not look that many hams are using them. Why? Who can tell me the
>drawbacks?

>I intend initially to build one. Somebody did it already?

>Thanks for the help. Anselmo (soon IZxxx).

Anselmo,
    I do not use a magnetic loop antenna, but I know many hams who do.
They are based on a sound design principle so there is no magic to how
they work.  The biggest problem is keeping the resistive losses down.
Since the radiation resistance is less than 0.01 ohms, extreme care
must be taken in the construction.  The Q is very high, so its
bandwidth is very narrow.  This is not a problem if you have a
remotely tuned resonating capacitor (which both MFJ and AEA do).  But
if you make your own loop, the capacitor will have to withstand
thousands of volts and hundreds of amps.
    Properly constructed, a short loop can perform well if it is kept
well away from large metal objects to which it will couple heavily if
too close.  However, it will not perform as well as a simple dipole.

Dudley



From [e-mail] Thu Jan 02 17:19:19 1997
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From: [e-mail] (Dudley Chapman)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: modified G5RV
Date: Fri, 27 Dec 1996 06:08:35 GMT
Organization: MindSpring Enterprises, Inc.
Lines: 29
Message-ID: <59vp0d$[e-mail]>
References: <[e-mail]>
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[e-mail] (Andrew S. Braytenbah Jr) wrote:

>Hello,
>       I am planning to build a G5RV, yet because I plan to
>use plastic jacketted awg 12 wire, I am wondering if I should
>make the legs less than 102 ft. Some have written that if this
>type of wire is used, the legs should be about 95% (0.95) of
>those from the standard formula.  Also, little has been written
>that I or ARRL knows of that might help me achieve
>near-resonancy without leaving it to the tuner to do all the
>work. Any experience or ideas in helping me come to grips with
>these two concerns (modified formula for shortenning, and
>making the antenna efficient on 20m would be appreciated.

>                               TNX,


>                                       Drew, KD4QCX

Drew,
    You are correct.  A correction of 95% of the original lengh is
usually recommended when the antenna wire is insulated.
     As for tuning, since all of the bands interact, I would not know
how to optimize the antenna on all bands.  Since the coax losses go up
with the frequency, I would tune it for a better match on the higher
bands in expense of the match on the lower bands.

Dudley



From [e-mail] Thu Jan 02 17:19:20 1997
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From: Robert Mansfield <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: EM hell?
Date: Fri, 27 Dec 1996 00:18:46 -0600
Organization: InterAccess, Chicago's best Internet Service Provider
Lines: 28
Message-ID: <[e-mail]>
References: <32c3b801.4651861@165.87.194.249> <[e-mail]>
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Alexander Vrenios wrote:
 <snip>
>
> In article <32c3b801.4651861@165.87.194.249>,
> Luiz Marcondes <[e-mail]> wrote:
> >Hi,
> >
> >About a mile from my home there are four TV (channels 2, 4, 9 and 14) and
> >several broadcast FM transmitters, all working with powers in the 100+ Kw
> >ERP class.
> >Radio reception is a nightmare, mostly (I think) because of IM products
> >in overloaded front end stages. In most bands there are several regions
> >at a spacing of about 100Khz, each 30-40 Khz wide with a harsh buzz
> >stronger than anything else.
> >Maybe a bandpass filter could alleviate the problem, but I don't know how
> >much out-of-band attenuation I'll need, any ideas?
> >73
> >
> >Luiz

Hi,

I live in downtown Chicago and have a lot of TV and FM transmitters near
by. For the low bands I have found that a low pass transmitting tvi
filter does a lot of good, I think that most of your problem is front
end overload.

Bob Mansfield WA8USR


From [e-mail] Thu Jan 02 17:19:21 1997
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From: "J. Mc Laughlin" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Passive Repeater???
Date: Thu, 26 Dec 1996 22:42:10 -0800
Organization: The Internet Ramp
Lines: 23
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
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[e-mail] wrote:
>
> Anikan wrote:
> >
> > Hello all, I am looking for information on a Passive Repeater. As far as i
> > understand it, it is notheing more than two antennas hooked up by a
> > certain length of feedline. No gain, but one would be useful to get a
> > signal into an area (or over an obstacle) without the regular equipment. I
> > would like to set one up to allow regular repeater access from a dead spot
> > in town.  Any help would be much appreciated.
> >
> > larry nixon VE7LFN
>
In some of the mountain areas, a large, flat reflector is mounted up
high and a low mounted beam is reflected off of the reflector.

Another, usually active, version used at UHF in urban areas to extend
the range of hand held radios uses a pair of antennas having a very high
FB ratio (second reflector behind the first reflector) connected by a
long cable usually with an amplifier, down converter, narrow filter, and
up converter (same LO for both converters).

Mac


From [e-mail] Thu Jan 02 17:19:22 1997
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From: [e-mail] (K6bob)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: TapeTenna
Date: 27 Dec 1996 07:13:33 GMT
Organization: AOL http://www.aol.com
Lines: 4
Message-ID: <[e-mail]>
References: <59timo$[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

Tony,
I live in Chatsworth, CA.  Would you believe that one of the board members
is a tech? What's this hobby coming to.
Bob


From [e-mail] Thu Jan 02 17:19:23 1997
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From: [e-mail] (Mike Del Pozzo)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 4el Quad for 20m
Date: Fri, 27 Dec 1996 07:21:57 GMT
Organization: MindSpring Enterprises
Lines: 23
Message-ID: <59vis6$[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: user-168-121-62-141.dialup.mindspring.com
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Bart Dolega <[e-mail]> wrote:

>I'm looking for plans of REAL GOOD QUBICAL QUAD Antenna for 20m
>3el-4el-5el ... I heard something about 4el Quad with 2 feeds (??)
>--

>                         _   _            _
> Vy 73 ! de         |_/ |_) (_| |\/| |   |_|      also SQ8AQV
>                    | \ |_) ._| |  | |__ | |
>                Bart Dolega  Harwood Hts,IL USA
>-AmprNet:[e-mail]-Ax25:kb9mla@db0fho.#nds.deu.eu-
>                -Internet:[e-mail]-
>    WWW Page: http://www.poznan.ampr.org/users/kb9mla.html
Hello Bart,
Why not try the dimentions of the Cubex 4 el Quad:
w/spacing of 10 feet ea. on 30 - 34 ft boom....
we're talking SERIOUS CANON here.....
gud luck es 73
de KR4TG
Mike Del Pozzo
Happy Cannon Owner




From [e-mail] Thu Jan 02 17:19:25 1997
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From: [e-mail] (Martin Ellis)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Losses in Triband Yagis
Date: 27 Dec 96 07:24:31 GMT
Organization: ucsd usenet gateway
Lines: 45
Message-ID: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]

Doug Hall KF4KL wrote:
> This issue of traps has been bothering me since
> I tried to model my old trapped antenna. Is it possible that there
> could be 3 dB of loss in the traps? Is there something about modelling
> trapped antennas that I need to know? (Roy, are you reading this?)
> Using two different methods I obtained a value of approx. 50
> for the Q. This seems awfully low to me.
> I wonder if all traps exhibit this kind of loss?
> Comments, anyone?

I have been using both 3 el and 4 el triband dual-driven antennas
for about 10 years.  I have a harsh coastal environment at 900 ft
elevation about 1 km from the Pacific coast. Corrosion has not
been a problem since I weather proofed the traps with RTV and self-
amalgamating rubber tape.

To discuss the trap losses I think you have to identify the band
in question.

In the case of my antenna, if you come out from the boom, the
first trap is a band stop (parallel circuit) on 10M.  The elements
are full size on 10m, and the trap stops RF from going beyond
the 10m element length.  I feel the antenna is competitive with
a monobander of similar dimensions on 10m.

On 15M the RF passes thru the 10m trap- which acts as a loading coil
on 15M- and then reaches the 15m trap which is a band stop.
The shortening on 15m is about 30pc and I expect that the loss
would be 2.5 db or so, with reference to a fullsized element.

On 20m, the 10m and 15m traps both act like loading coils, and the
tip part of the element brings it to resonance on 20m.
Again I expect the loss from shortening to be < 3db or so, relative
to a full sized element.
However the main compromise on 20m seems to be the short boom
and close spacing on that band, which reduces the f/b to around 12db.

I really have not spent time focussing on losses inside the traps.
Have I missed something here Roy?

Regards, and all the best for 1997.

Martin ZL1ANJ.
=============



From [e-mail] Thu Jan 02 17:19:26 1997
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From: [e-mail](-=Tony=-)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: TapeTenna
Date: 27 Dec 1996 09:14:00 GMT
Organization: Netcom
Lines: 20
Message-ID: <5a040o$[e-mail]>
References: <59timo$[e-mail]> <[e-mail]>
NNTP-Posting-Host: sfo-ca16-12.ix.netcom.com
X-NETCOM-Date: Fri Dec 27  3:14:00 AM CST 1996

In <[e-mail]> [e-mail]
(K6bob) writes:
>
>Tony,
>I live in Chatsworth, CA.  Would you believe that one of the board
members
>is a tech? What's this hobby coming to.
>Bob

Bob-

    With all the electronicers in your area, it would not be
surprising!

    I lived in a condo in adjacent Canoga Park at xxxxx International
Avenue for several years until 1984.  One could run into anyone there!

    Thanks for your humorous perspective.

    -=Tony=-    W6ANV   now in San Francisco, CA


From [e-mail] Thu Jan 02 17:19:28 1997
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From: Clyde Young <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: simple hf receiving antenna?
Date: Fri, 27 Dec 1996 01:32:05 -0800
Organization: GTE Intelligent Network Services, GTE INS
Lines: 21
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
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Wendy and Clark Ackison wrote:
>
> Eric Oyen wrote:
> >
> > I would like to build a simple verticla antenna that would give me
> > decent response over the 1.5 - 30 Mhz spectrum for short wave listening.
> > I will be moving into an apartment in February and want something that
> > will work well, be small in size and not look too ugly.
> >
> > I have checked the ARRL antenna handbook, but nothing in there even
> > comes close to what I need. any reasonable suggestions would be helpful.

Eric, you need to read the book; you will find the answer. Don't ask
someone else for a quick fix. Ask a question about something you don't
understand. You will learn more if you do it yourself. If this antenna is
only used for receiving then ...

--
C.Young
KF5QU
Abort, Retry, Failure is not an option!


From [e-mail] Thu Jan 02 17:19:29 1997
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From: [e-mail] (Dale Botkin)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 2 Meter Antenna
Date: Fri, 27 Dec 1996 11:05:18 GMT
Organization: Probe Technology Inc.
Lines: 14
Message-ID: <[e-mail]>
References: <32c3135e.12740574@199.190.65.4>
Reply-To: [e-mail]
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On Fri, 27 Dec 1996 00:10:18 GMT, [e-mail] (Doug D) wrote:

>Any reason I can't use #8 aluminum ground wire for a 2 meter antenna?
>I want to build in into a section of 1-1/2" PVC pipe.
>
None, as long as you can get a good electrical connection to it.  Inch
and a half PVC?  Building a J-pole, are you?


------------------------------------------------------------
Dale Botkin    (N0XAS/qrp)         |
Probe Technology Internet Services | [phone] Voice
Omaha, NE                          | [phone] FAX
..


From [e-mail] Thu Jan 02 17:19:30 1997
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From: [e-mail] (Ignacy Misztal)
Newsgroups: rec.radio.amateur.antenna
Subject: Transmitting Loop on Mobile: Why not? That's why!
Date: 27 Dec 1996 12:33:58 GMT
Organization: University of Georgia
Lines: 20
Message-ID: <5a0fnm$[e-mail]>
References: <59fnd8$[e-mail]> <[e-mail]> <59nj7u$[e-mail]>
Reply-To: [e-mail] (Ignacy Misztal)
NNTP-Posting-Host: num.ads.uga.edu
X-Newsreader: IBM NewsReader/2 v1.00

Small low-lying loops have two important properties:
1. Horizontal radiation is 10-20 db below the vertical,
2. Bandwidth is very narrow.

For good efficiency, a small loop would have to be positioned
horizontally. Since such a loop has strong nulls, there would be
considerable fading as the car moves.

Because of the low bandwidth, the loop would have to be tuned very
accurately. Slight bending could increase SWR above the limit,
especially on lower bands.  I am wondering if it is possible to
construct a loop with so stable hardware so that car vibrations would
not detune the loop.


Ignacy Misztal              Ham radio: NO9E, SP8FWB
E-mail: [e-mail]
University Of Georgia, 203 L-P Bldg., Athens, GA 30602
tel. [phone]



From [e-mail] Thu Jan 02 17:19:31 1997
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From: [e-mail] (Tom Sefranek)
Newsgroups: rec.radio.amateur.antenna
Subject: TRC-20K Balun
Date: Fri, 27 Dec 1996 13:02:22 GMT
Organization: cmcorp.com
Lines: 24
Message-ID: <5a0hgs$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: tcs.cmcorp.com
X-Newsreader: Forte Free Agent 1.0.82

I wonder if anyone has information on a TRC-20K BAL-UN.

This is a LARGE ?20 Kilowatt? BALUN.
I cut open the fibergalss box to fix it.
It is two windings  (Copper strips) on MANY ferrite (or powdered iron)
bars.

The input is a 50 ohm BIG Andrew connector,
the output is  two LARGE ceramic feed-thrus, with spark gaps.

What frequency range was it designed for?
What power level?
What impedance or transformation ratio?

I'll measure these things, but I wondered if anyone had the actual
specs.

ADVthanksANCE

Tom
WA1RHP
Net Elmer




From [e-mail] Thu Jan 02 17:19:32 1997
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From: [e-mail] (Russ Renaud)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: WTB: "Reflections" by Maxwell
Date: 27 Dec 1996 13:28:09 GMT
Organization: The National Capital FreeNet
Lines: 17
Message-ID: <5a0it9$[e-mail]>
References: <[e-mail]> <[e-mail]> <59v784$[e-mail]> <[e-mail]>
Reply-To: [e-mail] (Russ Renaud)
NNTP-Posting-Host: freenet2.carleton.ca
X-Given-Sender: [e-mail] (Russ Renaud)


Dick Flanagan ([e-mail]) writes:
> In article <59v784$[e-mail]>, [e-mail] (Peter Chow) wro
te:
>
>>I went through my November issue of QST and believe that "Reflections"
>>is not available thru ARRL. BTW, I would like to get a copy too.
>
> So would I!

It's a shame the ARRL would let such a fine volume go out
of print!

I seem to recall that the first 6 (??) chapters were based on
QST articles.  If you knew someone who had access to old QSTs,
you could probably have them copied.

73 de va3rr


From [e-mail] Thu Jan 02 17:19:33 1997
Newsgroups: rec.radio.amateur.antenna
Path: news1.epix.net!news3.epix.net!uunet!in1.uu.net!192.107.41.5!iglou!iglou.com!n4lq
From: [e-mail] (Steve Ellington)
Subject: G5RV FACTS
X-Nntp-Posting-Host: iglou1
X-Nntp-Posting-User: n4lq
Message-ID: <[e-mail]>
Sender: [e-mail] (News Administrator)
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Date: Fri, 27 Dec 1996 13:28:39 GMT
Lines: 49

The G5RV antenna is very popular. Here are some facts that may help those
who are considering one.

1. It was designed by Lou Varney, to act as a 20 meter antenna with some
gain.

2. Lou did not intend for it to be used on any other band(s).

3. The 31ft "matching stub" works only on 20 meters and provides only a
fair match 3:1 on 20 meters.

4. On bands other than 20 meters, the swr will be high and if coax is
used, loss will be greater than normally tolerated by antenna designers.

5. High losses in coax cause what appears to be a low swr at the station
end of the line thus deceiving the uninformed.

6. Using 70ft of coax will provide enough loss to make you think the swr
is low while it really isn't.

7. The antenna's directional pattern is different for each band.

8. The lenght of the flatop is inmaterial if used for bands other than 20
meters.

9. Lou recommends using latter line all the way from the rig to the
antenna for multiband use.

10. Random length, center fed dipoles used for many frequencies have been
around since the beginning of radio and before G5RV got his first ticket.

11. Yes, it will work but so will anything.

12. Yes, you can work ZL's, VK's etc. with it but that doesn't mean it's a
good antenna. It just means you worked them.

13. Any "ham" considering paying $$$$ for a G5RV needs to have is license
suspended until he reads an antenna manual.

14. The whole G5RV thing reminds me of some CB hype about their antennas
like the SUPER SKY BLASTER, THE MOON SHOOTER etc.

15. Please stop thinking that the G5RV is some kind of magic. It is not.




--
Steve Ellington [e-mail]  Louisville, Ky


From [e-mail] Thu Jan 02 17:19:35 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.idt.net!feed1.news.erols.com!news
From: "John Mullins" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: TapeTenna
Date: 27 Dec 1996 15:29:23 GMT
Organization: Erol's Internet Services
Lines: 8
Message-ID: <01bbf40a$68726b80$[e-mail]>
References: <59timo$[e-mail]> <[e-mail]>
NNTP-Posting-Host: dam-as14s21.erols.com
X-Newsreader: Microsoft Internet News 4.70.1155


Does anybody know if the FCC ruling about recieving antennas and Home/Condo
Owners Associations
Has anything do say about Transmitting?
I know the ruled that Hoa's can't prevent a homeowner from installing
Recieve equipment
But what is the ruling for Xmit?
John


From [e-mail] Thu Jan 02 17:19:36 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!mindspring!uunet!in3.uu.net!205.173.251.8!news1.iamerica.net!news
From: "Raymond B. Jeffus" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: MFJ 1798 Vertical Antenna
Date: 27 Dec 1996 15:49:43 GMT
Organization: Preferred Handgun Instruction
Lines: 18
Message-ID: <01bbf40c$30b258c0$[e-mail]>
References: <59ejfk$[e-mail]> <[e-mail]>
NNTP-Posting-Host: 207.22.198.61
X-Newsreader: Microsoft Internet News 4.70.1160

Mike Watson <[e-mail]> wrote in article <[e-mail]>...
> Julian Rhinehart wrote:
> >
> > Does anyone have information on the MFJ 1798 Vertical Antenna, 80M-2M?
> >
> > Tnx, Julian, KD7QY

I've had one for 2 years now and have been well pleased with the results.

I have to use an MFJ-903 6 Meter Tuner to get the  SWR for 6 M. down
because the  1798 uses the 17M element to radiate for 6M and I was not able
to get the best match  without using an additional tuner.  Guess I could
have tuned for 6M the used the tuner in my radio to tune 17m.  I also had
an additional use for the 6m tuner.  Either way I haven't regretted my
purchase.

Raymond Jeffus
AC5CP


From [e-mail] Thu Jan 02 17:19:37 1997
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From: "Alan Schoberg" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: HTX202 & 404Antennas
Date: 27 Dec 1996 16:06:00 GMT
Organization: WQ0J
Lines: 20
Message-ID: <01bbf40f$c7545460$[e-mail]>
References: <[e-mail]> <[e-mail]>
NNTP-Posting-Host: scurk.dot.rrnet.com
X-Newsreader: Microsoft Internet News 4.70.1155



Mark Brown <[e-mail]> wrote in article
<[e-mail]>...
> [e-mail] wrote:
> > Are the antennas for the HTX 202 and 404 the exact same part?  Was told
> > the antennas for these two radios were interchangeable. Doesn't make
> > sense?
>
>
> Why not- rubber ducks are just lossy dummy loads anyway!
>      Mark
>
I'll second that.  While riding my bicycle around Otter Tail lake in MN, it
was all we could do to keep in contact across the lake at 5 miles distance.
 This was a direct line of sight path over the water.  Both rigs were 2
meter HT's using rubber duck antennas.  Further along the lake at 11 miles
distance, my friend back at the cabin had to move indoors and use a 5/8
wave vertical on the roof to make contact with me.



From [e-mail] Thu Jan 02 17:19:38 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!mr.net!newshub.tc.umn.edu!lynx.unm.edu!SantaFe!usenet
From: "David B. Holtkamp (K5KH)" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Force 12 C4 review & comments (long)
Date: 27 Dec 1996 16:12:14 GMT
Organization: The Santa Fe Institute
Lines: 49
Message-ID: <01bbf40e$7092a9c0$[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: dial131.roadrunner.com
X-Newsreader: Microsoft Internet News 4.70.1155



Doug Hall <[e-mail]> wrote in article
<[e-mail]>...
>
> Greetings!
>    There seems to be a lot of interest in the Force 12 triband
> antennas but very little info actually posted about them.

  Doug,

  Thank you very much for posting such a long and informative message! I'm
looking at buying a new beam and Force 12 is one of the top contenders for
my $$$$! <hi>

  A couple of questions, though:

  In an earlier thread on Force 12 antennas, N5RZ wrote:

"The negative for me is that the elements are not at DC ground potential.
It would be easy to short the parasitics to ground, but I don't want to
butcher the driven elements!!  Static discharge is incredible at this QTH
due to the dry and windy WX  -  my HyGain antennas are at least two S units
quieter on static than antennas with "isolated from boom" elements."

  Are you able to compare the noise level to your earlier antenna? Is it
humid enough there (generally) that this issue isn't a concern?

  Also, you mentioned some slight quality control problems. Others have
seen the same (sortof randomly drilled rivet holes, mismeasured element
lengths, etc.) So your experience is not unique. Similar responses from
others on before/after sale tech support being spotty.

  You also wrote:

>I say "supposed to" because I'm
>feeding mine with ladder line and using a tuner. I know, it sounds
>silly to feed a rotatable antenna with ladder line, but it works just
>fine, lets me cover the whole 40m band, and works like a champ on 30m
>as well.

  I don't think it sounds silly at all! Properly installed ladder line will
not radiate significantly and will provide a very good way to have good
radiated output on the 40 m dipole. You mentioned good performance on 30 m
as well. Have you tried it on 17 or 12 m?

  Thanks again for a very useful post!!!!

  73s de David (K5KH)


From [e-mail] Thu Jan 02 17:19:39 1997
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From: Mark Brown <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: HTX202 & 404Antennas
Date: Fri, 27 Dec 1996 08:39:52 -0800
Organization: StarNet Communications, Inc
Lines: 8
Message-ID: <[e-mail]>
References: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: gravity-9.starpoint.net
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[e-mail] wrote:
> Are the antennas for the HTX 202 and 404 the exact same part?  Was told
> the antennas for these two radios were interchangeable. Doesn't make
> sense?


Why not- rubber ducks are just lossy dummy loads anyway!
     Mark


From [e-mail] Thu Jan 02 17:19:40 1997
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From: [e-mail] (Thomas P. Branch)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: HTX202 & 404Antennas
Date: Fri, 27 Dec 1996 18:01:57 GMT
Organization: MindSpring Enterprises, Inc.
Lines: 14
Message-ID: <5a12u0$[e-mail]>
References: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: user-37kba5n.dialup.mindspring.com
X-Server-Date: 27 Dec 1996 18:01:36 GMT
X-Newsreader: Forte Free Agent 1.0.82

[e-mail] wrote:

>Are the antennas for the HTX 202 and 404 the exact same part?  Was told
>the antennas for these two radios were interchangeable. Doesn't make
>sense?

Does not seem like they should unless RS is using a dual band
antenna--which does not seem likely.  I purchased a Larson duck for my
HTX-202 and have been very happy with it.  While my is 2 meter only,
Larson sells a dual-band duck as well.

73 de Tom, K4NR




From [e-mail] Thu Jan 02 17:19:41 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!news.sprintlink.net!news-pull.sprintlink.net!news.sprintlink.net!news-peer.sprintlink.net!worldnet.att.net!newsadm
From: Mr Hogan <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.cb
Subject: Q: Is a dipole any good for 11m?
Date: Fri, 27 Dec 1996 14:17:44 -0500
Organization: AT&T WorldNet Services
Lines: 18
Message-ID: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: 207.116.46.95
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Xref: news1.epix.net rec.radio.amateur.antenna:33262 rec.radio.cb:40052

Is a dipole any good for 11m antenna?

How can I measure the thickness of the conductor to multiply it against
the length of a half wave in free space?

Length(ft)= 492
            ---
            f(MHz)

I was looking to use shielded coax to keep the conductor from corrosion.

Any recomendations?

Thanks

,\\ichael

mailto:[e-mail]


From [e-mail] Thu Jan 02 17:19:41 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!portc02.blue.aol.com!audrey01.news.aol.com!not-for-mail
From: [e-mail] (MERVW2OE)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: [DX] Re: Titanex Verticals 160&80
Date: 27 Dec 1996 19:26:18 GMT
Organization: AOL http://www.aol.com
Lines: 2
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

Anyone know of anyone else who makes a full-sized 80 meter vertical?  Does
HyGain still make the HyTower?  Thanks, Merv


From [e-mail] Thu Jan 02 17:19:43 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!feed1.news.erols.com!news-xfer.netaxs.com!netnews.upenn.edu!news.misty.com!news.ipass.net![e-mail]
From: [e-mail] (Doug Hall)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Force 12 C4 review & comments (long)
Date: Fri, 27 Dec 1996 19:41:11 GMT
Organization: IPass.net
Lines: 68
Message-ID: <[e-mail]>
References: <[e-mail]> <01bbf40e$7092a9c0$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: customs58.ipass.net
Mime-Version: 1.0
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Content-Transfer-Encoding: 7bit
X-Newsreader: Forte Agent .99g/32.339

On 27 Dec 1996 16:12:14 GMT, "David B. Holtkamp (K5KH)"
<[e-mail]> wrote:
>
>  In an earlier thread on Force 12 antennas, N5RZ wrote:
>
>"The negative for me is that the elements are not at DC ground potential.
>It would be easy to short the parasitics to ground, but I don't want to
>butcher the driven elements!!  Static discharge is incredible at this QTH
>due to the dry and windy WX  -  my HyGain antennas are at least two S units
>quieter on static than antennas with "isolated from boom" elements."
>
>  Are you able to compare the noise level to your earlier antenna? Is it
>humid enough there (generally) that this issue isn't a concern?
>

Hmmm, I hadn't considered that possibility. Central North Carolina is
not known for its dry climate so this isn't an issue for me, and I
never thought about static discharge. I wonder if it's really
necessary to short the elements to the boom - would a fairly high
resistance from element to boom  (ie. 10K resistors)  keep the static
discharged without affecting antenna performance? At any rate, the
Force 12 actually *seems*  much quieter than my old antenna, but my
old antenna is now a twisted pile of aluminum so I can't do direct
comparisons. It's been cool and damp here lately, so maybe the noise
is just way down. Sometimes in the evenings I can tune across 20m and
the S-meter just sits around zero until I tune across someone. Such
was the case last night around midnight when I found KC4AAA booming in
on what I thought was a dead band. It's very gratifying to be told
that you're "loud" at the South Pole when many other stations are in
the noise. Of course, most of the other "loud" stations probably
thought 20m was dead and were either in bed or chasing DX on 80m :-)

>  Also, you mentioned some slight quality control problems. Others have
>seen the same (sortof randomly drilled rivet holes, mismeasured element
>lengths, etc.) So your experience is not unique. Similar responses from
>others on before/after sale tech support being spotty.

Email from others has confirmed this. I could be wrong, but I think
Force 12 is basically a very small company whose resources get
stretched sometimes. All in all I think they make a good product, and
I hope they'll address the Q/C and support issues.

>  You also wrote:
>
>>I say "supposed to" because I'm
>>feeding mine with ladder line and using a tuner. I know, it sounds
>>silly to feed a rotatable antenna with ladder line, but it works just
>>fine, lets me cover the whole 40m band, and works like a champ on 30m
>>as well.
>
>  I don't think it sounds silly at all! Properly installed ladder line will
>not radiate significantly and will provide a very good way to have good
>radiated output on the 40 m dipole. You mentioned good performance on 30 m
>as well. Have you tried it on 17 or 12 m?

Yes, in fact I can tune the 40m element on 17 and 12 even with the
850's built-in tuner. Seems to work fine, although the C3 section
still has more gain on 17 and 12. According to the Smith Chart there
are lengths of ladder line that would make it difficult to obtain a
match on these bands, but I seem to have hit it just right, especially
given the good performance on 40 and 30m.

73,
Doug Hall, KF4KL
[e-mail]
[e-mail]
http://www.jps.com



From [e-mail] Thu Jan 02 17:19:44 1997
Newsgroups: rec.radio.amateur.antenna
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!news.kei.com!newsfeed.internetmci.com!howland.erols.net!cs.utexas.edu!ennfs.eas.asu.edu!ennews!enuxsa.eas.asu.edu!vrenios
From: [e-mail] (Alexander Vrenios)
Subject: Re: [DX] Re: Titanex Verticals 160&80
Message-ID: <[e-mail]>
Sender: [e-mail] (USENET News System)
Organization: Arizona State University, Tempe, AZ
Date: Fri, 27 Dec 1996 19:44:40 GMT
References: <[e-mail]> <[e-mail]>
X-Nntp-Posting-Host: enuxsa.eas.asu.edu
Lines: 10

In article <[e-mail]>,
MERVW2OE <[e-mail]> wrote:
>Anyone know of anyone else who makes a full-sized 80 meter vertical?  Does
>HyGain still make the HyTower?  Thanks, Merv

   The last time I saw the HyTower in a catalog (AES) it was still available.
That was earlier this year. I believe it's 50' tall, so it isn't a full size
80m vertical, either. Good luck.




From [e-mail] Thu Jan 02 17:19:45 1997
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From: "David A. Cooley" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: HTX202 & 404Antennas
Date: Fri, 27 Dec 1996 14:50:02 -0500
Organization: IPass.net
Lines: 39
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]> <01bbf40f$c7545460$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: customs229.ipass.net
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X-Mailer: Mozilla 3.01 (Win95; I)

Alan Schoberg wrote:
>
> Mark Brown <[e-mail]> wrote in article
> <[e-mail]>...
> > [e-mail] wrote:
> > > Are the antennas for the HTX 202 and 404 the exact same part?  Was told
> > > the antennas for these two radios were interchangeable. Doesn't make
> > > sense?
> >
> >
> > Why not- rubber ducks are just lossy dummy loads anyway!
> >      Mark
> >
> I'll second that.  While riding my bicycle around Otter Tail lake in MN, it
> was all we could do to keep in contact across the lake at 5 miles distance.
>  This was a direct line of sight path over the water.  Both rigs were 2
> meter HT's using rubber duck antennas.  Further along the lake at 11 miles
> distance, my friend back at the cabin had to move indoors and use a 5/8
> wave vertical on the roof to make contact with me.


RS lists the same part numbers for the antennas on their web page... 440
is basically a 3rd harmonic of 2m, so if they use 1/4 wavelength of wire
in the 2m, it will be a 3/4 wave in the 440... I built an antenna for
mine a while back out of 10 guage copper... it had a small loading coil
a couple inches up from the conn (3 or 4 turns, can't remember which)
and a capacity disk on top made out of double sided PCB about 2" in
dia... actually worked very good for a handheld antenna...

Later,
Dave


--
========================================================================
David Cooley N5XMT                  Packet: N5XMT@W4RAL.#RTP.NC.USA.NOAM
Internet: [e-mail]    And Web: http://www.ipass.net/~cooldave/
Sponges grow in the ocean... Wonder how deep it would be if they didn't!
========================================================================


From [e-mail] Thu Jan 02 17:19:46 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!svr1.pdx.gstis.net!news.aloha.net!news-w.ans.net!newsfeeds.ans.net!newsjunkie.ans.net!newsfeeds.ans.net!news.rmii.com!rainbow.rmi.net!rainbow!jonz
From: [e-mail] (Bea and Marvin Jones)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 2 Meter Antenna
Date: 27 Dec 1996 20:09:43 GMT
Organization: Rocky Mountain Internet - (800) 900-RMII
Lines: 33
Distribution: World
Message-ID: <5a1ae7$[e-mail]>
References: <32c3135e.12740574@199.190.65.4>
NNTP-Posting-Host: rainbow.rmii.com
X-Newsreader: TIN [version 1.2 PL2]

Doug D ([e-mail]) wrote:
: Any reason I can't use #8 aluminum ground wire for a 2 meter antenna?
: I want to build in into a section of 1-1/2" PVC pipe.

Hi Doug!

That is a great idea.  I built the 6 element 2 meter beam I use from
#8 aluminum guy wire strands.  One strand is steel -- the other 8, or
so, are aluminum.  They are probably 'stiffer' than the stuff sold for
ground wire.  I found large piles of 'shorty' pieces that the local
REA dumped at a local junk yard.

Here's a tip that I cannot remember where I picked up:  Before cutting
the wire to length(s), stiffen it up by twisting it.  I usually do it in
lengths of 10 feet or so.  What I do is clamp one end in a vise, and
chuck the other end in a 'Big Drill'.  Wind'er up to where you have about
one twist per inch-and-a-half -- all the while pulling with the drill
away from the vise.  Too much twist and it becomes too brittle.

Then cut this twisted section into the length(s) you need.

I mounted my two meter beam (vertical) on the boom of my tri-bander up
at 40' -- fed by 3/4" cable tv hardline.  I'm working repeaters on the
east side of the continental divide (I'm on the west side.)

73 es Happy New Year
Jonesy W3DHJ
__
SK

--
Marvin Jones  [e-mail]
Gunnison, Colorado


From [e-mail] Thu Jan 02 17:19:47 1997
Path: news1.epix.net!news3.epix.net!uunet!in3.uu.net!199.249.160.130!news.csranet.com!usenet
From: Hal Rosser W4PMJ <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: dual-feed quad?
Date: Fri, 27 Dec 1996 13:22:56 -0800
Organization: CSRA Internet Services
Lines: 7
Message-ID: <[e-mail]>
NNTP-Posting-Host: line048.csranet.com
Mime-Version: 1.0
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X-Mailer: Mozilla 2.0 (Win16; I)

Heard about a dual-fed quad.. are they like the zl-special?
can someone enlighten us on this ?
I want to build one for 20m.
-- thanks in advance
de W4PMJ
HAL
[e-mail]


From [e-mail] Thu Jan 02 17:19:48 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.idt.net!www.nntp.primenet.com!nntp.primenet.com!enews.sgi.com!news.corp.sgi.com!walter.cray.com!newsmail
From: Walter Spector <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: powerful VHF/UHF antenna
Date: Fri, 27 Dec 1996 13:48:48 -0800
Organization: Are you kidding?
Lines: 56
Message-ID: <[e-mail]>
References: <59n2t5$1ff$[e-mail]> <[e-mail]> <[e-mail]> <59v64p$4ds$[e-mail]>
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CC: [e-mail]

Kraig Kolar wrote:
> : >Kraig,
> : >I have installed Radio shack, Winegard and the antenna avail at home
> : >centers. I found it had to believe there would be a difference, but
> : >there is a big one. The Winegard while more dollars out performs the
> : >others I put in for customers. I always used the Winegard CS-8200
> : >uhf/vhf model. It is 177" long 110" wide and does a great job for
> : >distant stations. You might consider a preamp also.

> : Be advised that a mast-mounted preamp in a plastic enclosure is asking
> : for trouble.

> Thanks for the replys!!  Does anyone know the vhf and uhf ranges for the
> winegard cs-8200?

I put up the big Winegard a few years ago (I think it is a CA-8200).
I also use the Winegard mast mount (and plastic body) preamp.
They have a bunch of different preamp models in their catalog.
I chose the one with moderate (about 16 db) gain, lowest noise,
and highest overload for VHF/UHF.  My XYL has not complained
about TVI from my ham gear!  I did need to enable the FM trap
to keep KQED (a very powerful PBS FM station) from overloading
channel 6.

From where I live the Santa Cruz mountains cause a lot of multipath.
One must be very adept with the rotor to get a decent picture.
Despite this, my best DX is from Redding (a couple hundred miles
north) on channel 12.  On UHF, I can often get channel 50 from
Santa Rosa (about 100 miles).  I can also DX most of the stations
in the Central Valley.  Considering the mountains surrounding my
house, I think this is pretty good.  If I were to move a mile or
two my reception would be very different.

Winegard also had a model called the CA-8100 (?) which was slightly
shorter and was a crossed design.  A salesman later told me that
this antenna was somewhat less affected by multipath than the 8200.
I don't know why this would be so.  The gains, f/b, and cost of
the two were about the same.

About two years ago, we had some very high winds (80 mph+!) and my
mast bent like a hairpin.  The preamp was upside down and was full
of water from the storm.  When re-erecting things I simply drained
the water out and it has worked fine ever since!  So the Winegard
preamp is certainly rugged.

>   Also, what about the cost?

I'm sorry - I don't remember.  With rotor, masts, coax, guys, etc
I probably have less than $300 into the whole setup.

Walt
--
Walt Spector
([e-mail])
Mountain View, California
_._ _._ _.... _. ._.


From [e-mail] Thu Jan 02 17:19:49 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!arclight.uoregon.edu!super.zippo.com!zdc!zippo!drn
From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: For sale  JRC receiver
Date: 27 Dec 1996 14:31:48 -0800
Organization: Zip News
Lines: 3
Sender: [e-mail]
Message-ID: <5a1iok$[e-mail]>
NNTP-Posting-Host: cust51.max5.miami.fl.ms.uu.net

hello everyone, the receiver is a NRD-535d hf receiver, i bpught it at Gilfer
radio, paid about $2000.00 for it, i am selling it for $1200.00 it is new used
 less then 5-10 hours, i bought it to listen to shortwave pirate broadcasts, b
ut got trancfered to Florida with my job, it has been in storage since,  I liv
e in vero beach Florida, but if interested could have it shipped to NY, Boston
, or Virginia, so you can see it, my Phone number is 407-464-2762, and my emai
l is [e-mail]..Have a hapy new year

john


From [e-mail] Thu Jan 02 17:19:50 1997
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From: [e-mail] (K6bob)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: TapeTenna
Date: 27 Dec 1996 22:45:14 GMT
Organization: AOL http://www.aol.com
Lines: 2
Message-ID: <[e-mail]>
References: <59vm7t$nfq$[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

Thanks for the tips, Gary
Bob


From [e-mail] Thu Jan 02 17:19:51 1997
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From: [e-mail] (CDN)
Newsgroups: rec.radio.amateur.antenna
Subject: 80/160 Flattop
Date: Sat, 28 Dec 1996 01:37:07 GMT
Organization: Systems Solutions Inc. (Arizona's Internet Provider)
Lines: 15
Message-ID: <[e-mail]>
Reply-To: [e-mail]
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Mime-Version: 1.0
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I am moving to a new location.  I will have a stretch of about 125
feet at about 35-40 feet height.  What would be a good antenna to put
up that will cover 80 and 160?  BTW, the ant will broadside to Europe.

Any suggestions appreciated

Thanks

cdn


                  C. Dean Norris, K7NO
               e-mail to [e-mail]
       Due to a lack of qualified trumpet players-
    The end of the world has been postponed two weeks


From [e-mail] Thu Jan 02 17:19:52 1997
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From: [e-mail] (Dick Hughes)
Newsgroups: rec.radio.amateur.antenna,rec.radio.cb
Subject: Re: Q: Is a dipole any good for 11m?
Date: Sat, 28 Dec 1996 01:43:15 GMT
Organization: Oregon Public Networking
Lines: 32
Message-ID: <[e-mail]>
References: <[e-mail]>
Reply-To: [e-mail]
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On Fri, 27 Dec 1996 14:17:44 -0500, Mr Hogan
<[e-mail]> wrote:

>Is a dipole any good for 11m antenna?
>
>How can I measure the thickness of the conductor to multiply it against
>the length of a half wave in free space?
>
>Length(ft)= 492
>            ---
>            f(MHz)
>
>I was looking to use shielded coax to keep the conductor from corrosion.
>
>Any recomendations?
>
>Thanks
>
>,\\ichael
>
>mailto:[e-mail]

I assume you are going to use this for the citizen's band.  You should
remember that the majority of users on 11 meters use vertically
polarized antennas.  If you mount your antenna horizontally, you will
not have very good luck with it.  Of course, you could hang it
vertically if you have a high support.

If you use #12 wire, compensating for the end effect of the
insulators, you should use the formula 467/fMhz.

Dick Hughes - W6CCD


From [e-mail] Thu Jan 02 17:19:55 1997
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From: [e-mail] (kate)
Newsgroups: rec.radio.amateur.antenna
Subject: VHF Antenna Question
Date: 28 Dec 1996 15:17:36 +1300
Organization: PlaNet (NZ) Manawatu, Palmerston North, New Zealand ([phone])
Lines: 39
Message-ID: <[e-mail]>
Reply-To: [e-mail] (kate)
NNTP-Posting-Host: papaioea.manawatu.gen.nz
Mime-Version: 1.0
Content-Type: text/plain; charset=iso-8859-1
Content-Transfer-Encoding: 8bit

I have a small portable aircraft band radio. This is not a
scanner radio or any similar device, just a simple device
which resembles what became known through the 1980s as a
"transistor radio". I am however aware that most radios have
transistors in them but am using this term to help people
visualise what I am referring to.
It is operated by batteries only and has a built in telescopic
whip antenna.

I would like to be able to tune into a local airport control
tower and ATIS station. The airport is roughly 25 Km away and
the only thing that separates me from it is a great number of
tall Radiata Pines. I can hear stations talking to the tower
(which is understandable) but cannot hear it's reply.

The problem is that, despite much searching, I cannot find any
external antenna terminals on this device, in other words, the
only terminal is the whip antenna itself. THis means that it
is difficult to utilise any of the posted antenna designs for
the VHF aircraft band as they all refer to either 300ohm or
75ohm designs, and all refer to 2 terminal designs.

Can i build an antenna using the antenna as one terminal and
the negative terminal as the other terminal? or am i missing
something?

Secondly, which antenna would be ideal for this purpose? Can
someone give me an idea of how to build this?


Thanks in advance,
KM


-- "There's a reason there's a banana in my ear.....
        I'm trying to lure the monkey out of my head"
                Franklin Sherman, The Critic's father.




From [e-mail] Thu Jan 02 17:19:56 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!worldnet.att.net!newsadm
From: Melvin Seyle <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Veritcal vs. G5RV ???
Date: Fri, 27 Dec 1996 18:32:22 -0800
Organization: AT&T WorldNet Services
Lines: 57
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]> <[e-mail]>
NNTP-Posting-Host: 207.116.65.66
Mime-Version: 1.0
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X-Mailer: Mozilla 2.02E (Win16; I)

Hugh Duff wrote:
>
> [e-mail] (W6KKT Jesse) wrote:
>
> >On Sat, 21 Dec 1996 03:45:42 GMT, [e-mail] (Hugh Duff) wrote:
>
> >>I'd like to hear from some experienced HFers...
> >>I will soon errect a modest antenna for HF.  Just wondering what would
> >>perform better  (I own both but only wish to put up one of them)...
> >>
> >>A  G5RV strung out in an inverted-V configuration that is raised to
> >>about 50' at the feedpoint with each leg running out to the corners of
> >>the backyard   OR   a vertical antenna at ground level in the center
> >>of the backyard with radials buried under the soil ?
> >>
> >>I'm aware that the vertical offers a lower angle of radiation which is
> >>ideal for DXing however  I'm leaning towards the G5RV since I'm
> >>reluctant to the thought of greatly reducing  the usuable space in the
> >>backyard once the vertical is installed.
> >>I'm not much of a DX chaser anyway...my HF operation is more casual.
> >>I just wonder after all considered if the G5RV would be a  compromise
> >>compared to the vertical.
> >>
> >>Thanks de Hugh, VA3TO
>
> >Hi Hugh, a G5RV was never designed for a inverted "V" config.  On the
> >higher bands it's performance and matching problems leave a lot to be
> >desired.
> >Have you considered multiple inverted Vees (one for each band you want
> >to work)  seperated 4 inches, connected to a common coax (thru a
> >balun)?  It performs much better than the G5RV inverted V.
> >Good Luck, Jesse, W6KKT
>
> Yes but my main concern is to keep the HF antenna as modest as
> possible. Its all about compromise I suppose but which is the best
> for the least is my question.  I actually have a tower and a triband
> beam that I can put up but would prefer not to in my new nieghborhood.
> Best performance/ least of an eyesore ???
>
> Thanks, Hugh

Hugh,

Put up 135' of wire and center feed it with 450 ohm twin lead.  You'll
need a tuner, but even the ones that handle a kilowatt can be had for a
reasonable price at hamfests ($100).  If you don't want to have to run
the twin lead into the house, get a Remote Balun from Radio Works, run
the twin lead to it, and run coax (must be less than 15') into your
house to the tuner.  It's a great antenna and fairly invisible.  I have
one up and use it all the time with good results.  I work a lot of 17M
and it competes well on that band.  I've worked a lot of DX with it.

Have fun!

73,
Mel
WA3KZR


From [e-mail] Thu Jan 02 17:19:57 1997
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!news-out.communique.net!uunet!in1.uu.net!205.252.116.190!feed1.news.erols.com!howland.erols.net!cliffs.rs.itd.umich.edu!portc01.blue.aol.com!audrey01.news.aol.com!not-for-mail
From: [e-mail] (Wb2chw)
Newsgroups: rec.radio.amateur.antenna
Subject: TriEx TM-490C available
Date: 28 Dec 1996 02:39:11 GMT
Organization: AOL http://www.aol.com
Lines: 3
Message-ID: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

TriEx TM-490C available. Latest "C" model in AS NEW Condition. Serious
ready and able inquiry only. Opportunity is knocking.
[e-mail]


From [e-mail] Thu Jan 02 17:19:58 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!news.mindspring.com!user-37kb9in.dialup.mindspring.com!user
From: [e-mail] (Michael T. Hodgson)
Newsgroups: rec.radio.amateur.antenna
Subject: Help! Need recommendations for HF vertical
Date: Fri, 27 Dec 1996 21:55:41 -0500
Organization: MobileComm Nationwide
Lines: 21
Message-ID: <[e-mail]>
NNTP-Posting-Host: user-37kb9in.dialup.mindspring.com
X-Server-Date: 28 Dec 1996 01:56:19 GMT

During our recent onslaut from Hurricane Fran, I lost all the trees in my yard
including the ones that held up my G5RV. I have tried every possible combo to
make the G5RV work from the house to the ground but it just does not work well
.

What suggestions does anyone have for a good vertical antenna, 80-10 a must.
160 would be nice but that is harder to do...I am running an Icom IC-751A
with a 2KL into an AT500 tuner.

Any comments and suggestions are greatly appreciated.

73

Mike

reply via e-mail to [e-mail] or to this forum.

--
Mike - Raleigh, NC USA

Opinions expressed herein are my own and do not in any way
represent those of my employer.


From [e-mail] Thu Jan 02 17:19:59 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!node2.frontiernet.net!usenet.logical.net!dciteleport.com!feed1.news.erols.com!news.idt.net!news.sprintlink.net!news-pen-16.sprintlink.net!news.gate.net!nntp.seflin.lib.fl.us!b070426c
From: [e-mail] (Joe Breitenbach)
Newsgroups: rec.radio.amateur.antenna
Subject: Bi-Directional VHF/UHF HELP!
Date: 28 Dec 1996 04:08:30 GMT
Organization: SEFLIN Free-Net - Broward County FL
Lines: 13
Message-ID: <5a26fu$[e-mail]>
NNTP-Posting-Host: bcfreenet.seflin.lib.fl.us
X-Newsreader: TIN [version 1.2 PL2]


Where can I get a bi-directional VHF/UHF with a 65-mile range?
I'm a bit south of the midway point between West Palm & Ft. Lauderdale,
and I want to pick up both markets.  Fortunately, all stations are due
north/south of me.  Small problem: WKPX 88.5 broadcasts 1 mile away
directly in the line of sight of channel 6 in Homestead (50 miles away).
Please feel free to e-mail directly.  Thanks.

--

Joe Breitenbach
[e-mail]
[e-mail]


From [e-mail] Thu Jan 02 17:20:00 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!news.mindspring.com!usenet
From: [e-mail] (Thomas P. Branch)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: HTX202 & 404Antennas
Date: Sat, 28 Dec 1996 04:09:58 GMT
Organization: MindSpring Enterprises, Inc.
Lines: 49
Message-ID: <5a26iu$[e-mail]>
References: <[e-mail]> <[e-mail]> <01bbf40f$c7545460$[e-mail]> <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: user-37kba2d.dialup.mindspring.com
X-Server-Date: 28 Dec 1996 04:10:06 GMT
X-Newsreader: Forte Free Agent 1.0.82

Had not even thought of that--thanks!

73 de Tom, K4NR



"David A. Cooley" <[e-mail]> wrote:

>Alan Schoberg wrote:
>>
>> Mark Brown <[e-mail]> wrote in article
>> <[e-mail]>...
>> > [e-mail] wrote:
>> > > Are the antennas for the HTX 202 and 404 the exact same part?  Was told
>> > > the antennas for these two radios were interchangeable. Doesn't make
>> > > sense?
>> >
>> >
>> > Why not- rubber ducks are just lossy dummy loads anyway!
>> >      Mark
>> >
>> I'll second that.  While riding my bicycle around Otter Tail lake in MN, it
>> was all we could do to keep in contact across the lake at 5 miles distance.
>>  This was a direct line of sight path over the water.  Both rigs were 2
>> meter HT's using rubber duck antennas.  Further along the lake at 11 miles
>> distance, my friend back at the cabin had to move indoors and use a 5/8
>> wave vertical on the roof to make contact with me.


>RS lists the same part numbers for the antennas on their web page... 440
>is basically a 3rd harmonic of 2m, so if they use 1/4 wavelength of wire
>in the 2m, it will be a 3/4 wave in the 440... I built an antenna for
>mine a while back out of 10 guage copper... it had a small loading coil
>a couple inches up from the conn (3 or 4 turns, can't remember which)
>and a capacity disk on top made out of double sided PCB about 2" in
>dia... actually worked very good for a handheld antenna...

>Later,
>Dave


>--
>========================================================================
>David Cooley N5XMT                  Packet: N5XMT@W4RAL.#RTP.NC.USA.NOAM
>Internet: [e-mail]    And Web: http://www.ipass.net/~cooldave/
>Sponges grow in the ocean... Wonder how deep it would be if they didn't!
>========================================================================




From [e-mail] Thu Jan 02 17:20:01 1997
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From: [e-mail] (Douglas S. Lomet Jr.)
Newsgroups: rec.radio.amateur.antenna
Subject: subscribe
Date: 28 Dec 96 04:26:23 GMT
Organization: ucsd usenet gateway
Lines: 1
Message-ID: <[e-mail]>
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]

add ham-ant


From [e-mail] Thu Jan 02 17:20:02 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!news.sprintlink.net!news-pull.sprintlink.net!news.sprintlink.net!news-peer.sprintlink.net!news-peer.gsl.net!news.gsl.net!usenet.eel.ufl.edu!news.atlantic.net!closer.scescape.net!usenet
From: "D. Douglas Smith" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: FS Drake Radio Equipment
Date: Fri, 27 Dec 1996 20:41:20 -0800
Organization: scescape internet
Lines: 19
Message-ID: <[e-mail]>
NNTP-Posting-Host: aiken2-17.ppp.scescape.net
Mime-Version: 1.0
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X-Mailer: Mozilla 2.02E-KIT  (Win16; U)

I have the following Drake radio equipment for sale:

All of this equipment is in very good condition and is in complete
working order.  Prices are negotiable.

Drake TR-7 160 - 10 meter Transceiver including am/cw filters & AUX-7,
$400.00
Drake PS-7 power supply, $200
Drake WH-7 0 2kw Watt Meter with VSWR, $60
Drake SP-75 Speech Processor, $60
Drake MS-7 Speaker $30
Drake L-7 with L-7 PS Power supply Linear Amplifier 0-160 meters, $600
Drake MN-2700 2kw Antenna Tuner, $180
Palomar M835 Peak Reading Watt Meter, $50
IC-2at Icom 2m hand held, $75

Email:  [e-mail]

Doug, N3-DGQ South Carolina


From [e-mail] Thu Jan 02 17:20:03 1997
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From: "J Mullins" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Telecommunications Act of 1996
Date: 28 Dec 1996 05:00:07 GMT
Organization: Erol's Internet Services
Lines: 29
Message-ID: <01bbf47b$ab267680$[e-mail]>
NNTP-Posting-Host: dam-as16s39.erols.com
X-Newsreader: Microsoft Internet News 4.70.1155

   The FCC, on August 5, !996 adopted a rule which partially pre-emts the
enforcement of community association restrictions with respect to satellite
dish antennas, broadcast television antennas, and other communication
reception devices.

The above statement is the leading sentence of a memo sent to the Board of
Directors of my community's Home Owners Association.
I will try to convey the main points.

"Under the new rule, any association Covenant, rule, or similar restriction
which "impairs" the installation, maitenence or use of certain antenas is
UNENFORCEABLE."

Antennas protected include dishes up to one meter and any size antenna
designed to recieve television broadcast services.

The FCC rule allows communities to regulate antennas so long as the
restriction does not "impair" the installation, maitenence or use of the
antenna.

HOA's can regulate the placement of antennas so long as the reception would
not be compromised

73

John  Mullins





From [e-mail] Thu Jan 02 17:20:03 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!uwm.edu!news.he.net!metro.atlanta.com!uunet!in1.uu.net!204.96.36.2!wizard.pn.com!news.zeitgeist.net!vnetnews.value.net!usenet
From: Harris Leck <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 80/160 Flattop
Date: Fri, 27 Dec 1996 21:18:39 -0800
Organization: Value Net Internetwork Services Inc.
Lines: 18
Message-ID: <[e-mail]>
References: <[e-mail]>
Reply-To: [e-mail]
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CDN wrote:
>
> I am moving to a new location.  I will have a stretch of about 125
> feet at about 35-40 feet height.  What would be a good antenna to put
> up that will cover 80 and 160?  BTW, the ant will broadside to Europe.
>
> Any suggestions appreciated
>
> Thanks
>
> cdn
>
>                   C. Dean Norris, K7NO

Dean, At 40' your signal is going straight up on both bands. Sometimes
you will hear loud DX on 80/75 (last night for example) but you won't be
competitive. Have you considered a vertical?
Harris VE6DK/W6


From [e-mail] Thu Jan 02 17:20:05 1997
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From: [e-mail] (Jim Weir)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: VHF Antenna Question
Date: Sat, 28 Dec 1996 05:28:44 GMT
Organization: RST Engineering
Lines: 29
Message-ID: <5a2b7j$[e-mail]>
References: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: i504.oro.net
X-Newsreader: Forte Free Agent 1.0.82

[e-mail] (kate) shared these priceless pearls of
wisdom:

->I have a small portable aircraft band radio. This is not a
->scanner radio or any similar device, just a simple device
->which resembles what became known through the 1980s as a
->"transistor radio".

Build one of those antennas, whether or not 50, 70, or 300 ohm (it will
make precious little difference to the operation).  Collapse the whip
antenna to as small a length as possible, or disconnect it (usually by a
small phillips head screw at the base).  Connect one end of the antenna to
this disconnect point or the antenna somewhere along its length (point not
critical).

Usually there is an earphone jack or some other external input/output.
Connect the other end of the antenna to the outer shell of one of these
input/output jacks, which is inevitably chassis ground.

Good luck and report your results here.

Jim

Jim Weir VP Engineering | You bet your sweet patootie I speak for the
RST Engineering         | company -- and I'm damned proud to do so.
Grass Valley CA 95945   | Airport: O17 (Grass Valley Intentional Airpatch)
http://www.rst-engr.com | AR Adv WB6BHI--FCC 1st phone---C-182A N73CQ
[e-mail]        | Comm'l/CFI-Airplane/Glider-A&P-FAA Counselor



From [e-mail] Thu Jan 02 17:20:06 1997
Path: news1.epix.net!news3.epix.net!uunet!in1.uu.net!199.0.65.182!news-in.tiac.net!posterchild![e-mail]
From: [e-mail] (Mike Capone)
Newsgroups: rec.radio.amateur.antenna,rec.radio.cb
Subject: Re: Q: Is a dipole any good for 11m?
Date: Sat, 28 Dec 1996 06:52:42 GMT
Organization: The Internet Access Company, Inc.
Lines: 39
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
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Xref: news1.epix.net rec.radio.amateur.antenna:33273 rec.radio.cb:40062

On Sat, 28 Dec 1996 01:43:15 GMT, [e-mail] (Dick Hughes) wrote:

:On Fri, 27 Dec 1996 14:17:44 -0500, Mr Hogan
:<[e-mail]> wrote:
:
:>Is a dipole any good for 11m antenna?
:>
:>How can I measure the thickness of the conductor to multiply it against
:>the length of a half wave in free space?
:>
:>Length(ft)= 492
:>            ---
:>            f(MHz)
:>
:>I was looking to use shielded coax to keep the conductor from corrosion.
:>
:>Any recomendations?
:>
:>Thanks
:>
:>,\\ichael
:>
:>mailto:[e-mail]
:
:I assume you are going to use this for the citizen's band.  You should
:remember that the majority of users on 11 meters use vertically
:polarized antennas.  If you mount your antenna horizontally, you will
:not have very good luck with it.  Of course, you could hang it
:vertically if you have a high support.
:
:If you use #12 wire, compensating for the end effect of the
:insulators, you should use the formula 467/fMhz.
:
:Dick Hughes - W6CCD

Uh how about the ye old 468/Frequency?  That seems to work fairly well in most
situations, and that "compensation" will vary depending on how the insulators
are affixed to the wire and what they are close to... i.e. ground, trees, powe
r
lines, etc....


From [e-mail] Thu Jan 02 17:20:08 1997
Newsgroups: rec.radio.amateur.antenna,rec.radio.cb
Path: news1.epix.net!news3.epix.net!uunet!in1.uu.net!206.229.87.25!news.sprintlink.net!news-peer.sprintlink.net!news.sprintlink.net!news-pull.sprintlink.net!news.sprintlink.net!news-pen-14.sprintlink.net!news.rain.net!PolarNet!not-for-mail
From: RADIOGOD <[e-mail]>
Subject: Re: Q: Is a dipole any good for 11m?
Message-ID: <[e-mail]>
Date: Sat, 28 Dec 1996 00:09:36 -0800
References: <[e-mail]> <[e-mail]>
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------------7D883735752C9
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A dipole will be good on any frequency Dick.  The L/D ratio is so
insignificant as to not even be considered in the equation.
(Length/Diameter).  It becomes important as you go higher in frequency,
especially toward UHF.  Hope I don't sound like Bill.
                                                                RG

------------7D883735752C9
Content-Transfer-Encoding: 7bit
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<HTML><BODY>

<DT>A dipole will be good on any frequency Dick.  The L/D ratio is
so insignificant as to not even be considered in the equation.  (Length/D
iameter).
It becomes important as you go higher in frequency, especially toward UHF.&nbs
p;
Hope I don't sound like Bill.</DT>

<DT>            &n
bsp;            &n
bsp;            &n
bsp;            &n
bsp;
RG </DT>

</BODY>
</HTML>
------------7D883735752C9--




From [e-mail] Thu Jan 02 17:20:09 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!cliffs.rs.itd.umich.edu!howland.erols.net!cs.utexas.edu!newshost.convex.com!newsgate.duke.edu!interpath!news.interpath.net!news.interpath.net!news
From: [e-mail] (Curt Phillips)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 4el Quad for 20m
Date: Sat, 28 Dec 1996 08:25:40 GMT
Organization: Mystic Knights of the Sea
Lines: 25
Message-ID: <5a2477$[e-mail]>
References: <[e-mail]>
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Bart Dolega <[e-mail]> wrote:
>I'm looking for plans of REAL GOOD QUBICAL QUAD Antenna for 20m
>3el-4el-5el ... I heard something about 4el Quad with 2 feeds (??)

  Before you put one of these up, talk to someone who has lived with one in
a climate similar to yours.

  Years ago, before I was licensed, the father of a friend of mine was an
avid DXer, and had a magnificent four element Quad up about 65 feet.
It was a sight to behold.

  Then, despite our normally pretty mild winters, a snow and ice storm hit.
Afterwards, his quad was an even more awe-inspiring sight to behold, but
not in a way he liked very much.  :-)

  They moved soon thereafter, but I think he converted to yagis.

--
=========== Opinions expressed are solely those of the author ==========
Curt Phillips, CEM K4CP exKD4YU;WB4LHI| They that can give up essential
Engineer/ Writer/ Gadgeteer/ Raconteur| liberty to obtain a little
Chairman, Tar Heel Scanner/SWL Group  | temporary safety deserve neither
ARRL Life; QCWA; Raleigh ARS; NRA; AEE|liberty nor safety. -Ben Franklin
==== [e-mail] ====== [Copyright 1996 All rights reserved]====



From [e-mail] Thu Jan 02 17:20:11 1997
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From: "Dennis A. Grindrod" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.cb
Subject: Re: Q: Is a dipole any good for 11m?
Date: Sat, 28 Dec 1996 06:10:13 -0500
Organization: Wireless Communications
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use 462 not 492
--

           Best Regards,
  Dennis A. Grindrod Sr. {WA1EHF}
"Lead,Follow Or Get Out Of The Way"



From [e-mail] Thu Jan 02 17:20:12 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!news.sprintlink.net!news-peer.sprintlink.net!howland.erols.net!news-e2a.gnn.com!usenet
From: BillBo <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Amature WEB Site !      http://www.angelfire.com/ny/madhacker/index.html
Date: Sat, 28 Dec 1996 04:01:31 -0800
Organization: GNN
Lines: 2
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References: <[e-mail]>
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Look at this web site ! has many other ham links
also lost child database !


From [e-mail] Thu Jan 02 17:20:13 1997
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From: [e-mail] (Don Stoner)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: TapeTenna
Date: 28 Dec 1996 13:22:59 GMT
Organization: AT&T WorldNet Services
Lines: 17
Message-ID: <5a36vj$[e-mail]>
References: <59timo$[e-mail]> <[e-mail]> <01bbf40a$68726b80$[e-mail]>
NNTP-Posting-Host: 207.147.128.250
X-Newsreader: WinVN 0.99.6

John, for more information, see Antenna Restrictive Covenants home page:

http://www.gate.net/~donstone/antenna.html

In article <01bbf40a$68726b80$[e-mail]>,
[e-mail] says...
>
>
>Does anybody know if the FCC ruling about recieving antennas and
Home/Condo
>Owners Associations
>Has anything do say about Transmitting?
>I know the ruled that Hoa's can't prevent a homeowner from installing
>Recieve equipment
>But what is the ruling for Xmit?
>John



From [e-mail] Thu Jan 02 17:20:15 1997
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From: [e-mail] (Graham Seale)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Verticals and  Dipoles
Date: Sat, 28 Dec 1996 13:48:18 GMT
Organization: Southline Electrolab
Lines: 31
Message-ID: <[e-mail]>
References: <[e-mail]>
Reply-To: [e-mail]
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In message <[e-mail]> Martin Ellis wrote:

> Listening from the South Pacific for band openings on 10M I am
> often surprised at the number of times the first stations
> to break through, are using verticals.

Hi Martin.

This result is interesting. Generally the takeoff angle for a
10 metre skywave is at a realistic low angle to make the
trans-Pacific trip if radiated from a vertical.

At much lower frequencies, I am used to the reality that
my horizontal dipole is a "low" dipole when the height is
considered as some fraction of a wavelength, and the wave
goes more or less straight upward , and comes down
all over Europe (80m). At 10m, the situation should be
different. Even at only 25 to 30ft, the antenna is well over
1/2 wavelength high, and so horizontal beams should be able
to launch effectively at a low(ish) angle.

Most of your log examples are West Coast USA stations, with
the exception of WD4NGB, who probably has a very respectable
setup. That anybody is trying 10m at this depressing stage
of the cycle is encouraging. Now we just need more input
about whether this superiority of verticals on 10 is good
for other paths also.

G4WNT
--
Graham


From [e-mail] Thu Jan 02 17:20:16 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.idt.net!news.bbnplanet.com!cam-news-hub1.bbnplanet.com!news.mathworks.com!uunet!in2.uu.net!206.72.128.98!news.icix.net!news.gate.net!not-for-mail
From: "Bob Dye" <[e-mail]>
Newsgroups: aus.radio.amateur.digital,aus.radio.amateur.misc,aus.radio.packet,in.ham-radio,rec.radio.amateur.antenna,rec.radio.amateur.digital.misc,rec.radio.amateur.equipment,rec.radio.amateur.misc,rec.radio.amateur.space,sci.geo.oceanography,sci.geo.satel
Subject: GPS / Radio Equipment for sale
Date: 28 Dec 1996 13:55:01 GMT
Organization: kc4hdk
Lines: 41
Message-ID: <01bbf4c6$b5c35540$7214e3c7@robert-j.-dye>
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Xref: news1.epix.net aus.radio.amateur.digital:313 aus.radio.amateur.misc:1700 in.ham-radio:409 rec.radio.amateur.antenna:33301 rec.radio.amateur.digital.misc:20907 rec.radio.amateur.equipment:45284 rec.radio.amateur.misc:121930 rec.radio.amateur.space:9229 sci.geo.oceanography:5678

Well here is the list.  Most of this equipment was hardly ever used.  I am
getting out of many parts of ham radio concentrating on my UHF repeater and
links to it.  I will pay for shipping.  Can do COD or check in advice.
Please pass on this message to others that may be interested.  If you are
on packet please post it on the local BBS.  Trying to generate revenue.
Thank you for your time.  People have asked if I was a smoker.  No I nor
anybody
in my home smokes.  The TS-690SAT is stock out of the factory with no extra
filters.  If interested will discuss other offers.  Need cash.  I have
references to others
that I have sold via e-mail/UPS and they were very happy.




Magellan Meridian GPS in good condition with Data Cable
$150!!

MFJ   VERSA TUNER V  GOOD
$250


KENWOOD         TS690                   EXCELLENT, WITH INTERNAL ANT TUNER
$1,200


AEA                    DSP-232               NEW IN BOX
$343


YAESU                G-5400B               EXCELLENT, WITH SEPARATOR KIT,
200'CABLE      $456



Bob
[e-mail]
561.552.3114 Voice Mail





From [e-mail] Thu Jan 02 17:20:18 1997
Path: news1.epix.net!news3.epix.net!uunet!in1.uu.net!206.58.0.35!news.structured.net!news.teleport.com!ip-pdx02-07
From: [e-mail] (Roy Lewallen)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Losses in Triband Yagis
Date: Sat, 28 Dec 96 14:04:06 GMT
Organization: EZNEC Antenna Software
Lines: 39
Message-ID: <5a39cr$1p5$[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ip-pdx02-07.teleport.com
X-Newsreader: News Xpress Version 1.0 Beta #3

In article <[e-mail]>,
   [e-mail] (Martin Ellis) wrote:
>. . .

>On 15M the RF passes thru the 10m trap- which acts as a loading coil
>on 15M- and then reaches the 15m trap which is a band stop.
>The shortening on 15m is about 30pc and I expect that the loss
>would be 2.5 db or so, with reference to a fullsized element.
>
>On 20m, the 10m and 15m traps both act like loading coils, and the
>tip part of the element brings it to resonance on 20m.
>Again I expect the loss from shortening to be < 3db or so, relative
>to a full sized element.
>However the main compromise on 20m seems to be the short boom
>and close spacing on that band, which reduces the f/b to around 12db.
>
>I really have not spent time focussing on losses inside the traps.
>Have I missed something here Roy?

Since you asked. . .

I've done some analysis of dipoles using traps I've made from coax and
measured. Depending on the combination of bands, it's hard to make a
multiband system that doesn't have a trap loss of a couple of dB on one
band or another. In some cases the loss is due to the finite coil Q on the
bands where it's acting like a loading coil. In other cases, there can be
an extremely high voltage across the trap on the band it's "trapping", also
causing loss. I haven't tried traps made from discrete LC components, but
the coax ones were pretty decent.

Some time ago I was made aware of a mechanism that lowers trap Q in beams.
The tubing close to the trap creates a shorted turn. (This effect can be
reduced by slotting the tubing for some distance from the trap, with an
insulating insert for mechanical support.) I don't have any direct
experience with how badly this affects the loss, but it might be
appreciable. It does point out the necessity of measuring the trap
characteristics with some pieces of tubing in position on each side.

Roy Lewallen, W7EL


From [e-mail] Thu Jan 02 17:20:19 1997
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From: [e-mail] (Joe Subich)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Force 12 C4 review & comments (long)
Date: 28 Dec 1996 14:09:14 GMT
Lines: 37
Message-ID: <5a39ma$2nck$[e-mail]>
References: <[e-mail]>
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In message <[e-mail]> - [e-mail] (Doug
Hall)Fri, 27 Dec 1996 02:29:32 GMT writes:
:>
:>
:>P.S.  One last thing - this issue of traps has been bothering me since
:>I tried to model my old trapped antenna. Is it possible that there
:>could be 3 dB of loss in the traps? Is there something about modelling
:>trapped antennas that I need to know? (Roy, are you reading this?) The
:>traps I measured were only 3 years old with no visible weathering.
:>Using two different methods I obtained a value of approx. 50 for the
:>Q. This seems awfully low to me. I hesitate to mention the antenna
:>manufacturer since I'm not sure if my measurements are correct, much
:>less my model. I wonder if all traps exhibit this kind of loss?
:>Comments, anyone?
:>

Doug,

I would question the accuracy of any model that shows 3dB loss in the
traps.  From a logical perspective, 3dB of trap loss is 750 watts in a
full legal power station.  Even if the loss were divided equally among
six traps, and most of the loss in transmit would be concentrated in the
driven element traps, that amounts to than 100 watts per trap.  With
that much loss (heat) we would be hearing about A LOT of trap failures,
particularly among the elite contest stations using stacked triband
antennas (the stacked TH7 or KT-34Xa guys).

Total trap losses of 1 dB or so would be more likely.

========================================================================
Joe Subich, W8IK ex-AD8I
     <[e-mail]>
     <[e-mail]>
     <[e-mail]>
     <[e-mail]>
========================================================================



From [e-mail] Thu Jan 02 17:20:20 1997
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From: [e-mail] (Graham Seale)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: modified G5RV
Date: Sat, 28 Dec 1996 14:14:40 GMT
Organization: Southline Electrolab
Lines: 37
Message-ID: <[e-mail]>
References: <[e-mail]>
Reply-To: [e-mail]
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In message <[e-mail]> Andrew S. Braytenbah Jr wrote:

> Hello,
>       I am planning to build a G5RV, yet because I plan to
> use plastic jacketted awg 12 wire, I am wondering if I should
> make the legs less than 102 ft. Some have written that if this
> type of wire is used, the legs should be about 95% (0.95) of
> those from the standard formula.

Hi Andrew

It scarcely matters what the length is. Certainly the 5 percent
you speak of is hardly worth the trouble. A G5RV has a low SWR
on 20m (approx) only. On all other bands you depend on the tuned
feeder and transmatch *working as a conjugate system* .

This is no bad thing provided the feeder loss is low. You can
gain quite a lot by replacing the whole feeder with balanced
(say 450 ohm) twin. Choose the type with polythene insulation
(black waxy feel) and wide slot windows. Better is to make up
a 2-inch wide open twin (500 to 600 ohm I think). Use a choke
balun at the output of the transmatch if you do not have a link
coupled type.

The G5RV has been analysed to death. I don't really want to
open the old wounds again because we have now had some years
of G5RV myth-breaking. Be confident that as you bring your
transmatch to indicate less than (say) 1.5:1 between the rig
and the transmatch, the transmatch will be presenting exactly
the right impedance to reflected energy to re-reflect it. In
the end, *all* the energy is radiated except that which heats up
your feeder because of feeder loss when handling high SWR.

Good luck with your project.
Regards G4WNT
--
Graham


From [e-mail] Thu Jan 02 17:20:21 1997
Path: news1.epix.net!news3.epix.net!uunet!in1.uu.net!152.163.170.17!newstf01.news.aol.com!audrey01.news.aol.com!not-for-mail
From: [e-mail] (Radiomatt)
Newsgroups: rec.radio.amateur.antenna
Subject: 60 FOOT ROHN 25 FS  Long island
Date: 28 Dec 1996 14:30:31 GMT
Organization: AOL http://www.aol.com
Lines: 2
Message-ID: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

$340. Has base, and rotator platform/top; side house mount.
ready to go.


From [e-mail] Thu Jan 02 17:20:22 1997
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!newsxfer2.itd.umich.edu!newsfeed.internetmci.com!news.campus.mci.net!n-f-m
From: Andy Zorca <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Lots of Ham and Electronic Parts
Date: Sat, 28 Dec 1996 08:58:58 -0800
Organization: CampusMCI
Lines: 5
Message-ID: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: s03-pm03.tnstate.campus.mci.net
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There are lots of electronic parts and Ham gear for sale at the
auction.  Hundreds of listings going cheap. (very).
Make sure you click on "More in this category at the bottom of the page"

http://www.ebay.com/aw/list-60.html


From [e-mail] Thu Jan 02 17:20:23 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!feed1.news.erols.com!howland.erols.net!portc02.blue.aol.com!audrey01.news.aol.com!not-for-mail
From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: WTB: "Reflections" by Maxwell
Date: 28 Dec 1996 17:38:40 GMT
Organization: AOL http://www.aol.com
Lines: 24
Message-ID: <[e-mail]>
References: <5a0it9$[e-mail]>
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In article <5a0it9$[e-mail]>,
[e-mail] (Russ Renaud) writes:

>
>It's a shame the ARRL would let such a fine volume go out
>of print!
>
>I seem to recall that the first 6 (??) chapters were based on
>QST articles.  If you knew someone who had access to old QSTs,
>you could probably have them copied.
>
>73 de va3rr
>
>

It is an excellent book, but the ARRL dropped it for some internal reason.

I think that World Radio Magazine is going to print it. That would nice of
them.

I would never give up my copy either!

73
Tom


From [e-mail] Thu Jan 02 17:20:23 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!cliffs.rs.itd.umich.edu!portc01.blue.aol.com!audrey01.news.aol.com!not-for-mail
From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: HF magnetic loop
Date: 28 Dec 1996 17:38:43 GMT
Organization: AOL http://www.aol.com
Lines: 21
Message-ID: <[e-mail]>
References: <59vom2$[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]
X-Newsreader: AOL Offline Reader

In article <59vom2$[e-mail]>, [e-mail]
(Dudley Chapman) writes:

>   Properly constructed, a short loop can perform well if it is kept
>well away from large metal objects to which it will couple heavily if
>too close.  However, it will not perform as well as a simple dipole.
>
>Dudley

Dudly says it all very well.

Any pressure contact in the loops RF path, an improper capacitor design,
even a few hundreths or tenths of an ohm of conductor loss, and mounting
the loop near conductors can serously hurt performance.

The MFJ is the better electrical design, but is still noticably weaker
than a dipole at the same mounting height. If you can use a dipole, or a
vertical with a reasonable ground, use one instead. The loop is a great
antenna for limited space where a large groundplane is not possible.

73 Tom


From [e-mail] Thu Jan 02 17:20:24 1997
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From: [e-mail] (Fractenna)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: TapeTenna
Date: 28 Dec 1996 18:15:24 GMT
Organization: AOL http://www.aol.com
Lines: 10
Message-ID: <[e-mail]>
References: <5a36vj$[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

There is another alternative to the tapetenna--its aluminum flashing tape,
available in 2 inch thicknesses at hardware stores. Sticky back. Cheeeep.

If you actually TAPE these antennas to surfaces you will watch your VSWR
go south...better to raise them a bit. Also, the aluminum stuff is
impossible to solder; perhaps someone has the scoop on soldering the
Tapetenna copper tape?

73
Chip N1IR


From [e-mail] Thu Jan 02 17:20:25 1997
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From: [e-mail] (Dick Hughes)
Newsgroups: rec.radio.amateur.antenna,rec.radio.cb
Subject: Re: Q: Is a dipole any good for 11m?
Date: Sat, 28 Dec 1996 18:17:40 GMT
Organization: Oregon Public Networking
Lines: 15
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]> <[e-mail]>
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On Sat, 28 Dec 1996 00:09:36 -0800, RADIOGOD <[e-mail]>
wrote:

>A dipole will be good on any frequency Dick.  The L/D ratio is so
>insignificant as to not even be considered in the equation.
>(Length/Diameter).  It becomes important as you go higher in frequency,
>especially toward UHF.  Hope I don't sound like Bill.
>                                                                RG

I think the significance here is that he wants to use a dipole for
citizen's band operation.  For DX that's fine, but for normal, local
use a horizontal dipole is going to have a serious signal loss with
everyone else being vertically polarized.

Dick Hughes - W6CCD


From [e-mail] Thu Jan 02 17:20:26 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna,sci.electronics.misc
Subject: Re: EM hell?
Date: Sat, 28 Dec 1996 18:38:46 GMT
Organization: A customer of Pacific Bell Internet Services
Lines: 14
Message-ID: <5a3p8o$[e-mail]>
References: <32c3b801.4651861@165.87.194.249>
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Xref: news1.epix.net rec.radio.amateur.antenna:33308 sci.electronics.misc:19221

[e-mail] (Luiz Marcondes) wrote:

>Hi,

>About a mile from my home there are four TV (channels 2, 4, 9 and 14) and
>several broadcast FM transmitters, all working with powers in the 100+ Kw
>ERP class.
  I have a similar problem in San Francisco, living very close to our
major transmitting tower. I have found there is no one easy solution.
Using a low pass filter helped, grounding everything properly helped,
swithing from from a vertical to a horizontally polorized antenna made
a big difference, and I received and ANC-4 for XMAS which will be my
next attack on the problem. Good luck.



From [e-mail] Thu Jan 02 17:20:27 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Force 12 C4 review & comments (long)
Date: 28 Dec 1996 20:30:53 GMT
Organization: AOL http://www.aol.com
Lines: 22
Message-ID: <[e-mail]>
References: <01bbf40e$7092a9c0$[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]
X-Newsreader: AOL Offline Reader

In article <01bbf40e$7092a9c0$[e-mail]>, "David B.
Holtkamp (K5KH)" <[e-mail]> writes:

>"The negative for me is that the elements are not at DC ground potential.

>It would be easy to short the parasitics to ground, but I don't want to
>butcher the driven elements!!  Static discharge is incredible at this QTH
>due to the dry and windy WX  -  my HyGain antennas are at least two S
units
>quieter on static than antennas with "isolated from boom" elements."
>
>

Why not stick a large value resistor, say 100K ohm or so from the element
to the boom.  I don't know for sure, but if the idea is to dissapate
static, wouldn't this work?

The other solution is to use a quad.  <G>

ke1c




From [e-mail] Thu Jan 02 17:20:28 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Q: Is a dipole any good for 11m?
Date: 28 Dec 1996 20:30:57 GMT
Organization: AOL http://www.aol.com
Lines: 6
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]
X-Newsreader: AOL Offline Reader

In article <[e-mail]>, "Dennis A. Grindrod"
<[e-mail]> writes:

>use 462 not 492

Not a big deal, but I thought it was 468.


From [e-mail] Thu Jan 02 17:20:30 1997
From: [e-mail] (Hugh Duff)
Newsgroups: rec.radio.amateur.antenna
Subject: Dualband beams ???
Date: Sat, 28 Dec 1996 20:49:00 GMT
Organization: ICA Canada
Reply-To: [e-mail]
X-Newsreader: Forte Free Agent 1.0.82
NNTP-Posting-Host: box2-n2-ip60.ica.net
Message-ID: <[e-mail]>
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I'm trying to assemble a modest antenna system while trying to
get the reasonable performance for the least amount of hardware on the
tower.
Wondering how well these dualband (2m/70cm) beams perform ?
How much degredation in performance would be noticed if I
was to compare one of these with a comparable arrangement
of 2 independant beams ?
ie... are there any losses due to interactance between
the 2m and 70cm elements ?

TBL...are these dualband beams any good ?

Thanks, Hugh  VA3TO




From [e-mail] Thu Jan 02 17:20:31 1997
Newsgroups: rec.radio.amateur.antenna
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From: [e-mail] (George Hiscox)
Subject: Re: WTB: "Reflections" by Maxwell
Message-ID: <32c58d57.2435392@10.0.2.1>
Followup-To: *
Sender: [e-mail]
Reply-To: [e-mail]
Organization: WA6RIK
X-Newsreader: Forte Agent .99e/16.227
References: <5a0it9$[e-mail]> <[e-mail]>
Date: Sat, 28 Dec 1996 21:17:18 GMT
Lines: 17

>In article <5a0it9$[e-mail]>,
>[e-mail] (Russ Renaud) writes:
>
>>It's a shame the ARRL would let such a fine volume go out
>>of print!

You might check with Ham Radio Outlet to see if they have any copies left at a
ny
of their stores.  The store closest to you can do a computer check of stock at
all the other stores.

Good book!

Good luck!

Happy New Year!

73/George


From [e-mail] Thu Jan 02 17:20:32 1997
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From: "Kenneth Carrigan" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Coax transmission line theory Q?
Date: 28 Dec 1996 21:37:46 GMT
Organization: CARRIGAN ELECTRONICS
Lines: 10
Message-ID: <022c121c$18949660$b7bda1ce@pentium>
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Anyone know the impedance calculations for determining
an input versus output impedance given the input Z, coax
cable Z and coax length?  I've got a 50 ohm source, and
50 ohm/75 ohm coax and want to know if I can match a
~ 10,000 ohm load?  This is for a plasma experiment so
I just need some theory or a computer program - freeware.

Thanks,
Ken Carrigan



From [e-mail] Thu Jan 02 17:20:32 1997
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From: Jerry Decker N5RV <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: FS: GAP Titan DX in area
Date: Sat, 28 Dec 1996 16:59:53 -0600
Organization: Texas Metronet Inc.
Lines: 17
Message-ID: <[e-mail]>
Reply-To: [e-mail]
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GAP Titan DX 80-10 vertical antenna. Does not use ground radial (uses a
counter-poise.)

Will not ship.

Located in Dallas/Ft. Worth area. Will deliver local or hold for pick
up.

$125 or trade.


--
============================================================
Jerry Decker N5RV (ex WR5V)
Mac User, Novice Programming, Ham Radio
The opinions voiced here are my own and not of Motorola Inc.
http://www.metronet.com/~jdecker/


From [e-mail] Thu Jan 02 17:20:33 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: question  butternut hf5v
Date: Sun, 29 Dec 1996 00:42:52 GMT
Organization: Earthlink Network, Inc.
Lines: 7
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X-Newsreader: Forte Free Agent 1.1/32.230

does anyone know how to install the 17 and 12 meter add on to this
antenna  got the antenna used any don't have any paperwork on this
part of the antenna???
brian  N2MLP


PS:  anyone know abount the six meter kit ????


From [e-mail] Thu Jan 02 17:20:35 1997
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From: [e-mail] (Martin Ellis)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Ham-Ant Digest V96 #928
Date: 29 Dec 96 01:40:29 GMT
Organization: ucsd usenet gateway
Lines: 28
Message-ID: <[e-mail]>
References: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]

> From: [e-mail] (Roy Lewallen)
> Subject: Losses in Triband Yagis
> Some time ago I was made aware of a mechanism that lowers trap Q in
> beams. The tubing close to the trap creates a shorted turn.
> (This effect can be reduced by slotting the tubing for some
> distance from the trap, with an insulating insert for mechanical
> support.) I don't have any direct experience with how badly this
> affects the loss, but it might be appreciable.
> It does point out the necessity of measuring the trap characteristics
> with some pieces of tubing in position on each side.
> Roy Lewallen, W7EL
> ------------------------------
Thanks for your comment Roy. I had always assumed that the main loss
in gain relative to a full sized element was due to shortening,
and this outweighed the (smaller) trap losses.

Your comment on the possibility of a *shorted turn* puzzles me a little.
In the case of the antenna I use, there are two types of tubing in
proximity to the coil:
The inner tubing (from the boom) projects inside the coil former;
and the outer trap cover propects it from weather and forms the
mechanical link between the inner and outer element lengths.
I understood that the tubing formed the capacitor part of the
parallel tuned circuit- and if it is part of the tuned circuit,
it would not seem to be a *shorted turn*. Did I miss something here?
Regards, and best wishes for 1997.
Martin ZL1ANJ



From [e-mail] Thu Jan 02 17:20:36 1997
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From: "Chuck" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Blocking ham/cb interference on stereo equipment?
Date: 29 Dec 1996 02:04:40 GMT
Organization: MindSpring Enterprises
Lines: 27
Message-ID: <01bbf52c$b3f89700$[e-mail]>
References: <59jrda$[e-mail]>
NNTP-Posting-Host: ip236.south-bend.in.pub-ip.psi.net
X-Newsreader: Microsoft Internet News 4.70.1155

Tell him to buy a low pass filter or threaten to cut his coax.....some
locals have code enforcement for just such problems...Radio shack has a
filter for the phones. Try changing the length of your speaker wire as well
for your stereo. He is probably running an obnoxious amount of audio. Take
a sewing needle push it in to his coax break it off with wire cutters &
push it through so he cant see it. Also ask him to add as much height as
possible to help reduce TVI.



Kingfish <[e-mail]> wrote in article
<59jrda$[e-mail]>...
> Hi Everyone,
>
> A neighbor of mine has a ham or cb radio, and his transmissions come
> out over my stereo, telephone, clock radio - anything with a speaker.
> The FCC won't do anything about it.
>
> I know there are filters you can put on your telephone to block some
> of the interference.  Is there anything like that for stereo
> equipment?
>
> Thanks,
>
> JOn
>
>


From [e-mail] Thu Jan 02 17:20:37 1997
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From: [e-mail] (Ron Harshbarger)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Coax transmission line theory Q?
Date: 29 Dec 1996 02:05:12 GMT
Organization: (missing)
Lines: 26
Message-ID: <5a4jko$[e-mail]>
References: <022c121c$18949660$b7bda1ce@pentium>
NNTP-Posting-Host: 192-118.dynamic.visi.com
Mime-Version: 1.0
Content-Type: Text/Plain; charset=US-ASCII
X-Newsreader: WinVN 0.99.8 (x86 32bit)

In article <022c121c$18949660$b7bda1ce@pentium>, [e-mail] says...
>
>Anyone know the impedance calculations for determining
>an input versus output impedance given the input Z, coax
>cable Z and coax length?  I've got a 50 ohm source, and
>50 ohm/75 ohm coax and want to know if I can match a
>~ 10,000 ohm load?  This is for a plasma experiment so
>I just need some theory or a computer program - freeware.
>
>Thanks,
>Ken Carrigan
>
If your source is truly 50 Ohms and the cable is 50 Ohms, as long as the cable

is terminated to 50 Ohms the length is not a factor except for I2R loss. To
make that happen you will need to buy/build either a matching transformer or a

matching network. It will match 50 Ohms to 10 KOhms so the the cable "sees" 50

and the load "sees" 10K. Get yourself a copy of the ARRL Handbook for Radio
Amateurs, any year, and look up impedence matching. Every library has at least

one copy.

Good luck!
--
Ron Harshbarger
K3PID
[e-mail]



From [e-mail] Thu Jan 02 17:20:38 1997
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From: [e-mail] (J Engle)
Newsgroups: rec.radio.amateur.antenna
Subject: TRAP DIPOLE recommendation please
Date: 29 Dec 1996 02:39:14 GMT
Organization: IQuest Network Services
Lines: 10
Message-ID: <4a60uc$[e-mail]>
NNTP-Posting-Host: ind-0014-17.iquest.net
X-Newsreader: News Xpress Version 1.0 Beta #4

I am interested in purchasing a trap dipole for 40-20-15-10 meters,
up to 500 watts.

Could someone please recommend a trap dipole they have used and were
pleased with?
Also does anyone know of such a dipole that has recieved favorable reviews
by a magazine, etc?

Many Thanks
Joe Engle WB9IND



From [e-mail] Thu Jan 02 17:20:39 1997
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From: [e-mail] (R. Dale Piedfort)
Newsgroups: rec.radio.amateur.antenna
Subject: DXER.COM is back online, check it out
Date: Sun, 29 Dec 1996 02:53:45 GMT
Organization: A customer of Pacific Bell Internet Services
Lines: 18
Message-ID: <[e-mail]>
NNTP-Posting-Host: ppp-206-170-220-142.anhm01.pacbell.net
X-Newsreader: Forte Free Agent 1.1/32.230

"WE'RE BACK", "DXER.COM" "Your Ham Radio Resource Site"
is back on line and ready to provide you with the most
comprehensive ham radio related site on the Internet...

Stop by and check it out..29 indexes.  Everything from
DX Clubs, EME, Packet Radio, Scanners, Shortwave, QRP,
Maritime, Callbooks, Contest Calendars, Software, Clusters.
Radio Modifications, Sarex, Mir, MARS and many others.
Many more links have been added and we are now approaching
500 links, with more to come...

In addition to the interactive BBS, we will be adding in
the near future a Ham E-Mail Callbook...

Stop on by "http://www.dxer.com" and let us know what you
think, and what you would like to see added to the ever
growing list of links..



From [e-mail] Thu Jan 02 17:20:40 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!worldnet.att.net!newsadm
From: "John C. Ko" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: G5RV Ant Specification
Date: Sat, 28 Dec 1996 21:55:01 -0500
Organization: WorldWide Subnet Corp.
Lines: 13
Message-ID: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: 207.116.45.61
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.0Gold (Win95; I)

Hello, OM

I would like to know what is the specification of G5RV ant. and its
construction details.

Many discussion had been made, however, I could not get its detailed
information on 1996 ARRL Handbook.

I also would like to know its Pros and Cons comparing Dipole Ant.

Best 73 !

John  N2FNO  [e-mail]


From [e-mail] Thu Jan 02 17:20:41 1997
Path: news1.epix.net!news3.epix.net!uunet!in2.uu.net!206.58.0.35!news.structured.net!hootowl.ykm.com!news
From: "Ron Fitzgerald" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Sommer Antennas
Date: 29 Dec 1996 03:11:24 GMT
Organization: home
Lines: 9
Message-ID: <01bbf534$35151820$99ad3ace@larry>
NNTP-Posting-Host: 206.58.173.153
X-Newsreader: Microsoft Internet News 4.70.1155

Ordered the small antenna a month ago and keep getting the runaround from
Sommer.
A seemingly endless profusion of excuses and confusion on their end.

Anybody else had the same problem?

Getting really hard to spend money in the ham community.




From [e-mail] Thu Jan 02 17:20:42 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!news.enteract.com!feed1.news.erols.com!howland.erols.net!usc!newshub.csu.net!csulb.edu!usenet
From: Dan Dillon <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Followup to "help me decide on an HF mobile Antenna"
Date: Sat, 28 Dec 1996 20:15:44 -0800
Organization: Cal State Long Beach
Lines: 38
Message-ID: <[e-mail]>
NNTP-Posting-Host: p8-as2.lonbea1.csu.sloc.net
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
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X-Mailer: Mozilla 2.01Gold (Win95; I)

Hello All,

Last week I posted a request for suggestions on HF mobile antennas for
a trip I will be taking on the 2nd.  I would like to thank all that
posted and/or E-mailed me suggestions.  I was able to reply to most, but
not all responses.  They were all appreciated.

I have decided to go with a set of Hamsticks by Lakeview company.  I
picked up sticks for 20, 40, and 75 meters after much thought.  Unfort-
unately HRO was out of the ten meters so I picked a Valor brand ten meter
stick instead.

Warning to all attempting to tune Hamsticks... DO NOT FOLLOW THE
GUIDELINES LAID OUT IN THE INSTRUCTIONS.  THEIR WHIP LENGHT GRAPH IS
WAY OFF!  Unfortunately, due to this, I cut one whip to a length 1MHz
above the ham band.  It seems that every single graph, for every band
that I had purchased is approximately one MHz off of what it should be.
I did manage to get them all tuned, one with a whip from another antenna.
They tune properly at about ten inches longer than the instructions
suggest.  It was quite frustrating.

In february I will post my successes or failures with these antennas
on my trip to New Hampshire from sunny and warm So. California.

Look for me on HF beginning in LA on Jan 2nd.  73 and happy new year.

Dan


K D 6 F P X
--
                                                   ( . )
                                                     |
__Dan Dillon________________________________________/|\___KD6FPX______
Mailto://[e-mail]    http://www.engr.csulb.edu/~ddillon/
PGP Public Key: http://www.engr.csulb.edu/~ddillon/ddillon_pub_key.asc
PGP Fingerprint   =>   02 A6 07 34 22 80 53 09 8C 1E 5E 15 1A B4 43 1F
Please:      No unsolicited E-mail avertising or religious propaganda.


From [e-mail] Thu Jan 02 17:20:43 1997
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From: [e-mail] (Dave Rugh)
Newsgroups: rec.radio.amateur.antenna
Subject: Mobile antenna for HT 2m/70cm dual bander
Date: 29 Dec 1996 06:09:46 GMT
Organization: Delta Internet Services, Anaheim, CA
Lines: 17
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I'd like to put up a mobile antenna on my Honda Civic to boost the signal on
my YAESU FT50R HT dual bander operating on the 2m and 70cm bands.  On an
earlier thread Diamond and Larson mobile antennas for a pickup truck; from
other sources I've heard Comet antennas are good. The main reason for getting
the antenna is to hit an autopatch more clearly although I can get through to
local repeaters with my rubber ducky pretty well here in Orange County, CA.

What is intermod BTW?

Has anyone had experience using an amp to boost the power from an HT in mobile

operation?  Right now the HT puts out a max 5 watts of power.

Thanks,

Dave
KF6HYZ



From [e-mail] Thu Jan 02 17:20:44 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: ?? GAP TITAN DX-VIII ??
Date: Sat, 28 Dec 1996 22:19:03 -0800
Organization: A customer of Pacific Bell Internet Services
Lines: 30
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Kg0jn wrote:
>
> >Does anyone information on the HF multibandvertical TITAN DX-VIII GAP ?
> >
> >Tnx , Jan PE1PDQ
>
> Hello Jan,
>
> I use one and have been very happy with it.  Relatively easy to put up (I
> made it harder by mounting mine up on a mast...to keep the counterpoise
> off the ground and out of harm's way for the neighborhood kids).  It's
> even survived a 70 mph wind with no guys.
>
> The people at GAP have also been very responsive and knowledgable when
> I've had questions, needed help, etc. (I had some questions esp due to my
> needing to mount the antenna up on the mast).
>
> You might try their web site at GAPANTENNA.COM (though the site is not
> complete yet) or email them at [e-mail]
>
> Hope that helps...good luck!
>
> 73 de Eric, KG0JN

Have had mine up( Titan )since lMay.
No problems with it.
Works great.
Just follow directions out of the box and plugin.
People at GAP have been great about answering questions.
Lou KB6FFT


From [e-mail] Thu Jan 02 17:20:45 1997
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From: [e-mail] (Don Klipstein)
Newsgroups: rec.radio.amateur.antenna,sci.electronics.misc
Subject: Re: EM hell?
Followup-To: rec.radio.amateur.antenna,sci.electronics.misc
Date: 29 Dec 1996 06:39:08 GMT
Organization: Thomas' Consulting
Lines: 36
Message-ID: <5a53mc$oog$[e-mail]>
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Xref: news1.epix.net rec.radio.amateur.antenna:33340 sci.electronics.misc:19258

Luiz Marcondes ([e-mail]) wrote:
: About a mile from my home there are four TV (channels 2, 4, 9 and 14) and
: several broadcast FM transmitters, all working with powers in the 100+ Kw
: ERP class.
: Radio reception is a nightmare, mostly (I think) because of IM products
: in overloaded front end stages. In most bands there are several regions
: at a spacing of about 100Khz, each 30-40 Khz wide with a harsh buzz
: stronger than anything else.
: Maybe a bandpass filter could alleviate the problem, but I don't know how
: much out-of-band attenuation I'll need, any ideas?
:
: Luiz

  If the buzz is of a frequency like the power line frequency or a
harmonic thereof, then the nearby transmitters may not be the culprit.
Instead, nearby corona on a high voltage power line, a nearby neon sign,
or a nearby light dimmer may be the offender.  Although the noise from
these is usually broadband, the noise could get concentrated into bands
spaced 100 KHz apart if something resonant around 100 KHz is involved in
the noise production.

  I would try temporarily turning off all fluorescent lights, neon signs,
lights with dimmers, etc. and asking your neighbors to do the same to see
if any of these is the offender.  I have often found light dimmers to be
major RF noise sources.

  Possibly, an RF noise filter for the AC power for your receiver may help
things.  If you isolate a single offending appliance, it may help to plug
it into an RF noise filter.  If you use any filters with either the
offending appliance or the receiver, try all combinations of plug reversal
to see what works best.  Both leads of any offending appliance may not
equally spew noise, and both lines in the filter may not equally block
noise.  Both lines of the receiver's power cord may not equally bring
noise into the receiver, if this is the route the noise takes.

 - Don Klipstein ([e-mail] or [e-mail])


From [e-mail] Thu Jan 02 17:20:47 1997
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From: [e-mail] (Dexter N. Muir)
Newsgroups: rec.radio.amateur.antenna
Subject: (none)
Date: 29 Dec 96 06:45:31 GMT
Organization: ucsd usenet gateway
Lines: 29
Message-ID: <[e-mail]>
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]


Greetings, all...

   There have been hiccups in the Digest distribution, somewhere between my
provider (massey.ac.nz) and ucsd.edu, and I am missing the following Digests:

855
871
911 and
926

    They are not in the archive: the script only processes one Digest per
day.  I archive these for local Hams, and try my best to get them all... and
one or two of the current threads are of interest to me. Jim KA6TPR
([e-mail]) has helped with some others, listed in a previous post
(thanks, Jim!). Has anyone else trapped these, who could email them to me
(Mime attachments OK)?

73 de ZL3LH.

 --------------------------------------------------------------------------
| Dexter N. Muir          Manufacturing Pilot Plant Technician             |
| [e-mail]   Department of Production Technology              |
|                         Massey University, Palmerston North, New Zealand |
| http://www.massey.ac.nz/~DNMuir/                                         |
| "Honesty pays --- but not enough."   "Modesty pays --- but even less!! " |
 --------------------------------------------------------------------------




From [e-mail] Thu Jan 02 17:20:47 1997
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From: "Chuck" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Antenna help
Date: 29 Dec 1996 07:06:08 GMT
Organization: MindSpring Enterprises
Lines: 7
Message-ID: <01bbf556$d2599760$[e-mail]>
NNTP-Posting-Host: ip30.south-bend.in.pub-ip.psi.net
X-Newsreader: Microsoft Internet News 4.70.1155

I need a good multi band antenna for limited space aplications. I have a 60
ft tower & if I ran an inverted V i could only separate the ends at a 60
degree angle. What wouild happen if I ran something like a multi band
sloper verticly?? I want tu use this antenna for 15 through 160 m meters.
Please help. I am open to any suggestions.

[e-mail]


From [e-mail] Thu Jan 02 17:20:48 1997
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From: [e-mail] (W8PU)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Help! Need recommendations for HF vertica
Date: 29 Dec 1996 07:11:48 GMT
Organization: AOL http://www.aol.com
Lines: 13
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Mike I have had several verticals over the years, the latest one was a
cushcraft AP8A with 100 radials. I have since parted with it and I
recommend a vertical as a last result. I dont care how much some may like
them, if they are ground mounted they are not going to work as well as a
dipole. I had very good luck with 15 ft of tv mast on the apex of my roof
( approx 30 ft high ) and a 80 meter dipole feed with 40 feet of 450 ohm
line and a tuner. It would tune all bands and for 160 I tied the  feedline
ends together and loaded the antenna as a top loaded vertical against two
1/4 wave counterpoises. The length of the feedline will affect how well it
loads on individual bands so you may have to play with the length. Maybe
you could purchase a telescoping mast to use at the gable apex. The
antenna serves also as guys in two directions. works well...73 Gary W8PU.
ps dont buy a cuscraft vertical, I had numerous trap failures.


From [e-mail] Thu Jan 02 17:20:49 1997
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From: "Chuck" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Antron -99 on 17 , 15 & 12 meter ????
Date: 29 Dec 1996 07:15:19 GMT
Organization: MindSpring Enterprises
Lines: 4
Message-ID: <01bbf558$2cbf91e0$[e-mail]>
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X-Newsreader: Microsoft Internet News 4.70.1155

It is my understanding that the A-99 is a very broadbanded antenna indeed
but have any of you tried it at 15 & 17 meters??? I have every confidence
at its ability to tune up for 10 -12 meters. How about 15 - 17???



From [e-mail] Thu Jan 02 17:20:50 1997
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From: [e-mail] (W8PU)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Verticals and  Dipoles
Date: 29 Dec 1996 07:18:04 GMT
Organization: AOL http://www.aol.com
Lines: 6
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

Probably because a lot of activity is from techs with cb antennas??? just
a guess.



73 Gary


From [e-mail] Thu Jan 02 17:20:51 1997
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From: [e-mail] (W8PU)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: modified G5RV
Date: 29 Dec 1996 07:20:39 GMT
Organization: AOL http://www.aol.com
Lines: 3
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

Forget the coax, feed it with 450 ohm line and a tuner. Make 125 ft approx
and dont worry about the wire insulation. The G5RV was a 20 meter antenna
and not suppose to work all bands.  73 Gary W8PU


From [e-mail] Thu Jan 02 17:20:52 1997
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From: Ted Yamada <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Antenna for High Noise area?
Date: Sun, 29 Dec 1996 00:02:12 -0800
Organization: lafn.org
Lines: 13
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I live in a very bad location for HF.
There's a string of Major power lines running East <-> West
apx 50 yars south of me. Even when the insulators have just
been cleaned and arcing is at a minimum, the noise level
is still high.

Does anyone have a suggestion for the best antenna for
this bad situation? I would suspect that a low Impedance
narrow band antenna would be best, something like some sort of
loop. Am I on the right track???

TIA,
Ted...


From [e-mail] Thu Jan 02 17:20:52 1997
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From: [e-mail] (PIESIEWICZ)
Newsgroups: rec.radio.amateur.antenna
Subject: (none)
Date: 29 Dec 96 10:09:48 GMT
Organization: ucsd usenet gateway
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add ham-ant
______________________________________________________________
Polbox On-Line Service              Internet Services Provider
[phone]                                Web Pages Design
FREE EMAIL ACCOUNTS                      http://free.polbox.pl



From [e-mail] Thu Jan 02 17:20:53 1997
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From: "Lorenzo & Katrina Baldwin" <[e-mail]>
Newsgroups: rec.radio,rec.radio.amateur.antenna,rec.radio.amateur.boatanchors,rec.radio.amateur.digital.misc,rec.radio.amateur.dx,rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.amateur.misc,rec.radio.amateur.policy,rec.radio.amateur.space
Subject: Pro & Cons on Cordless Telephone Headsets????
Date: 29 Dec 1996 11:01:43 GMT
Organization: Preferred Company
Lines: 6
Message-ID: <01bbf576$b2ead0e0$[e-mail]>
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Xref: news1.epix.net rec.radio.amateur.antenna:33343 rec.radio.amateur.boatanchors:1344 rec.radio.amateur.digital.misc:20931 rec.radio.amateur.dx:1713 rec.radio.amateur.equipment:45364 rec.radio.amateur.homebrew:22551 rec.radio.amateur.misc:122064 rec.radio.amateur.policy:44908 rec.radio.amateur.space:9247

Hello everyone....I hate to intrude but I'm doing some research on the
cordless telephone headset.  Would you all please take a moment and reply
with some pros and cons on cordless telephone headset?

Thanks,
L & K


From [e-mail] Thu Jan 02 17:20:54 1997
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From: [e-mail] (Morel Grunberg)
Newsgroups: rec.radio.amateur.antenna
Subject: Hy-Gain TH-11DX power rating
Date: 29 Dec 96 11:15:43 GMT
Organization: ucsd usenet gateway
Lines: 15
Message-ID: <c=US%a=_%p=TELRAD%l=[e-mail]>
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]

Hello,

I'm looking for the conservative power ratings ( SSB / RTTY ) for the
Hy-Gain
TH-11DX beam with BN-4000 balun. It is not clear for me what "4000"
means
( I suppose 4000W pep ) and if the driven elements will withstand
2-2.5kW continous with an appropiate powerful balun .  How are the traps
built ? Like in previous Hy-Gain models or electrically stronger ?
Sorry, but I wasn't able to get the info from Hy-Gain and the market is
full of people with no much understanding  on dB and watts.

73 and "Happy New Year"
Morel, 4X1AD
reply to:  [e-mail]


From [e-mail] Thu Jan 02 17:20:55 1997
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From: [e-mail] (Morel Grunberg)
Newsgroups: rec.radio.amateur.antenna
Subject: K7LWC "Towertalk" reflector e-mail ?
Date: 29 Dec 96 11:18:48 GMT
Organization: ucsd usenet gateway
Lines: 8
Message-ID: <c=US%a=_%p=TELRAD%l=[e-mail]>
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]

Hello,

I'm looking for the e-mail subscription adress for "Towertalk"
reflector.

73 and "Happy New Year"
Morel, 4X1AD
reply to:  [e-mail]


From [e-mail] Thu Jan 02 17:20:56 1997
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From: Mr Hogan <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.cb
Subject: Q: Is a dipole any good for 11m?(Thankyou)
Date: Sun, 29 Dec 1996 08:51:30 -0500
Organization: AT&T WorldNet Services
Lines: 22
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References: <[e-mail]> <[e-mail]> <[e-mail]>
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J&J Mac wrote:
>
> > >Is a dipole any good for 11m antenna?
> > >
> >
>
> What do you think the Antron 99 is?

I haven't the slightest idea. Did you have more to add.

,\\ichael

As the original poster I learned:

A dipole isn't really for local use on 11m(CB) but great for pulling
in DX. A dipole can be a dream if setup correctly on 10m.(& others)

Thankyou everyone who replied.

Peace

,\\ichael


From [e-mail] Thu Jan 02 17:20:57 1997
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From: Mr Hogan <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: TapeTenna
Date: Sun, 29 Dec 1996 09:02:28 -0500
Organization: AT&T WorldNet Services
Lines: 23
Message-ID: <[e-mail]>
References: <5a36vj$[e-mail]> <5a4n65$[e-mail]>
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Fractenna wrote:
>
> There is another alternative to the tapetenna--its aluminum flashing tape,
> available in 2 inch thicknesses at hardware stores. Sticky back. Cheeeep.
>
> If you actually TAPE these antennas to surfaces you will watch your VSWR
> go south...better to raise them a bit. Also, the aluminum stuff is
> impossible to solder; perhaps someone has the scoop on soldering the
> Tapetenna copper tape?

Wouldn't conductive paint give you a connection between both parts.

How would conductive paint work as an antenna? I know it will hold
enough current to run hidden microphone.

I'm no expert, I have no real knowledge about this stuff other than
reading books. It sounds feasable to me.

Can we paint a beautiful antenna array on a shack wall?

Peace

,\\ichael


From [e-mail] Thu Jan 02 17:20:58 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Antron -99 on 17 , 15 & 12 meter ????
Date: Sun, 29 Dec 1996 14:15:33 GMT
Organization: Earthlink Network, Inc.
Lines: 9
Message-ID: <[e-mail]>
References: <01bbf558$2cbf91e0$[e-mail]>
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X-Newsreader: Forte Free Agent 1.1/32.230

On 29 Dec 1996 07:15:19 GMT, "Chuck" <[e-mail]> wrote:
YES THE ANTENNA LOADS UP GREAT ON 15/17 METER
BRIAN

>It is my understanding that the A-99 is a very broadbanded antenna indeed
>but have any of you tried it at 15 & 17 meters??? I have every confidence
>at its ability to tune up for 10 -12 meters. How about 15 - 17???
>



From [e-mail] Thu Jan 02 17:20:59 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: HAM TOOLKIT CD ROM..AWSOME!!!!
Date: Sun, 29 Dec 1996 14:36:49 GMT
Organization: Indigo
Lines: 16
Message-ID: <[e-mail]>
NNTP-Posting-Host: ts02-06.dublin.indigo.ie
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Check out our Awsome CD ROM.."HAM TOOL KIT"..Its jam packed with over
600MEGS of Amateur Radio Related Software..its all here on one
disk..buy no other !!!.

Surf to us at http://sphynx.com/murphy

Owned by Hams..for Hams!!!
           M U R P H Y     E L E C T R O N I C S
GSM Mobile Phones & Accessories. Satellite TV and Decoding Systems
     CD Rom Multimedia    Computer Accessories
http://sphynx.com/murphy          Email: [e-mail]

Why not send us an SMS to our GSM phone..Simply surf to
http://home.sn.no/~ahaltbak/engsms.htm  and type in the number
[phone], write your message and fill in your Email address.all for FREE !
!!



From [e-mail] Thu Jan 02 17:21:00 1997
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From: Gary Danaher <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Blocking ham/cb interference on stereo equipment?
Date: Sun, 29 Dec 1996 08:49:40 -0600
Organization: Flashnet Communications, http://www.flash.net
Lines: 12
Message-ID: <[e-mail]>
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Chuck wrote:
snip
> Take a sewing needle push it in to his coax break it off with wire cutters &
> push it through so he cant see it.
snip
> Kingfish <[e-mail]> wrote in article
> <59jrda$[e-mail]>...

You bet, that's the ticket. If you don't get shot for being on private
property, he can sue you for destroying property, maliciousness, etc.,
and if he is a licensed ham, you are violating fedral statutes as well.
Yes, sticking a needle in the coax is a wonderful idea. What a lid.


From [e-mail] Thu Jan 02 17:21:01 1997
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From: [e-mail] (Gary Fiber)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Mobile antenna for HT 2m/70cm dual bander
Date: Sun, 29 Dec 1996 15:18:09 GMT
Organization: Chambers Multimedia Connection
Lines: 23
Message-ID: <5a6289$aqp$[e-mail]>
References: <5a51va$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: pm2-20.edmonds.cmc.net
X-Newsreader: Forte Free Agent 1.0.82

[e-mail] (Dave Rugh) wrote:

>I'd like to put up a mobile antenna on my Honda Civic to boost the signal on
>my YAESU FT50R HT dual bander operating on the 2m and 70cm bands.  On an
>earlier thread Diamond and Larson mobile antennas for a pickup truck; from
>other sources I've heard Comet antennas are good. The main reason for getting

>the antenna is to hit an autopatch more clearly although I can get through to

>local repeaters with my rubber ducky pretty well here in Orange County, CA.

On my business trips I carry a carefully tuned  Larsen 2 meter quarter wave
antenna on a magnet mount.  I tuned it for 146.000 MHz and it works flawlessly
on 440 MHz.  The match on 440 Mhz is less than 1.5 to 1.  Of course there are
some fancy small dual band antennas that may have some gain.

>Has anyone had experience using an amp to boost the power from an HT in mobil
e
>operation?  Right now the HT puts out a max 5 watts of power.

I have used a amplifier with a 2 meter handheld, worked fine.  You should
connect it directly to the battery though.

Gary




From [e-mail] Thu Jan 02 17:21:02 1997
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From: "Dale R. Parfitt" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: EM hell?
Date: Sun, 29 Dec 1996 10:19:07 -0500
Organization: PAR Electronics
Lines: 36
Message-ID: <[e-mail]>
References: <32c3b801.4651861@165.87.194.249> <[e-mail]> <[e-mail]>
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To: [e-mail]

Robert Mansfield wrote:
>
> Alexander Vrenios wrote:
>  <snip>
> >
> > In article <32c3b801.4651861@165.87.194.249>,
> > Luiz Marcondes <[e-mail]> wrote:
> > >Hi,
> > >
> > >About a mile from my home there are four TV (channels 2, 4, 9 and 14) and
> > >several broadcast FM transmitters, all working with powers in the 100+ Kw
> > >ERP class.
> > >Radio reception is a nightmare, mostly (I think) because of IM products
> > >in overloaded front end stages. In most bands there are several regions
> > >at a spacing of about 100Khz, each 30-40 Khz wide with a harsh buzz
> > >stronger than anything else.
> > >Maybe a bandpass filter could alleviate the problem, but I don't know how
> > >much out-of-band attenuation I'll need, any ideas?
> > >73
> > >
> > >Luiz
>
> Hi,
>
> I live in downtown Chicago and have a lot of TV and FM transmitters near
> by. For the low bands I have found that a low pass transmitting tvi
> filter does a lot of good, I think that most of your problem is front
> end overload.
>
> Bob Mansfield WA8USR

Hi Bob,

You did not state what frequencies you wish to RX.

Dale W4OP


From [e-mail] Thu Jan 02 17:21:03 1997
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From: [e-mail] (Rick Markey)
Newsgroups: rec.radio.amateur.antenna
Subject: RE: G5RV
Date: 29 Dec 96 16:12:47 GMT
Organization: ucsd usenet gateway
Lines: 5
Message-ID: <[e-mail]>
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]


There is a great description of the G5RV in Volume 1 of the ARRL Antenna Compe
ndium, Page 86 by Louis Varney, G5RV

de Rick, KN3C



From [e-mail] Thu Jan 02 17:21:04 1997
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From: Scott Ryan <[e-mail]>
Newsgroups: rec.radio.shortwave,rec.radio.amateur.antenna
Subject: SWL pre-selector/pre-amp
Date: Sun, 29 Dec 1996 10:13:56 -0600
Organization: InfiNet
Lines: 8
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I'm considering a SWL pre-selector/pre-amp.  The features I'd like are;

1. Able to select from two (or more) antennas from the front panel.
2. adjustable gain/attenuator (+/- 20 db).
3. Connections for coax w/ PL259 & a random longwire fed with
insulated    wire.

Any suggestions, good or bad, are welcome.


From [e-mail] Thu Jan 02 17:21:04 1997
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From: [e-mail] (Fractenna)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Blocking ham/cb interference on stereo equipment?
Date: 29 Dec 1996 16:38:04 GMT
Organization: AOL http://www.aol.com
Lines: 9
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

Sewing needle? Good luck sticking THAT in coax....As to federal
statutes--which ones?

Hmmm.. seem to remember stories about very bad RF burns when neighbors
tried to 'pin' coax..

What happened to the 'ferrite' suggestions? Not good enough?!

Chip N1IR


From [e-mail] Thu Jan 02 17:21:06 1997
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From: J&J Mac <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.cb
Subject: Re: Q: Is a dipole any good for 11m?(Thankyou)
Date: Sun, 29 Dec 1996 10:02:24 -0800
Organization: West Coast Online's News Server - Not responsible for content
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Message-ID: <[e-mail]>
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Mr Hogan wrote:
>
> J&J Mac wrote:
> >
> > > >Is a dipole any good for 11m antenna?
> > > >
> > >
> >
> > What do you think the Antron 99 is?
>
> I haven't the slightest idea. Did you have more to add.
>
> ,\\ichael
>
> As the original poster I learned:
>
> A dipole isn't really for local use on 11m(CB) but great for pulling
> in DX. A dipole can be a dream if setup correctly on 10m.(& others)
>
> Thankyou everyone who replied.
>
> Peace
>
> ,\\ichael

Sorry Michael, I guess I was being a bit sarcastic.

One of the hottest selling 11 AND 10 meter antennas is the Antron 99. It
is a vertical dipole that is
guised as a fiberglass sectional antenna.  For "better performance" the
antron has a ground plane kit that
helps reduce rfi by altering the radiation pattern.

I had one in my CB days and it performed nicely, but no better than a
dipole I made with 3/8" copper
tubing.  The point may be in polarization. while I have never been able
to prove one over the other,
horizontal polarization for me has a much cleaner receive while vertical
tends to pick up more
man-made noise. As you know, beams are little more than tuned dipoles
working together to create more gain.

I've only been on the air for 20 so years so there will be others with
more knowledge guised as opinion.


73'  Jim..


From [e-mail] Thu Jan 02 17:21:07 1997
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From: "Christopher Bolek!" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Cross Yagi
Date: 29 Dec 1996 18:58:59 GMT
Organization: Internet Connect Company [phone], USA
Lines: 19
Message-ID: <01bbf5b1$1d714680$[e-mail]>
NNTP-Posting-Host: ppp-gnv-fl-092.atlantic.net
X-Newsreader: Microsoft Internet News 4.70.1155

Hello all,

I am somewhat new to this newsgroup so I hope this question is not of
"spam" quality.  :)

I am looking for information (web page, email, etc.) for the logistics of
building a cross yagi for 6 meter.  Now this is NOT going to be circular
polarization but actual dual.  I'm going to run 2 feedlines and have
vertical and horizontal on one boom.  I have seen this used in 2 meter and
11 meter for multi-mode purposes  but never 6 meter.

I am looking for the construction specifics of putting both sets of
elements on the boom and what interference I may run into.

Any help will be greatly appreciated.  And if there is anything I can do
for anyone here I will be more than happy to do what I can.  I am a
cellular field engineer by profession and a Ham by obsession.  :)

Chris, KF4GJK


From [e-mail] Thu Jan 02 17:21:08 1997
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From: <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,sci.electronics.misc
Subject: Re: EM hell?
Date: 29 Dec 1996 19:23:20 GMT
Organization: Telus Advanced Communications
Lines: 37
Message-ID: <5a6gf8$[e-mail]>
NNTP-Posting-Host: 207.34.107.28
Xref: news1.epix.net rec.radio.amateur.antenna:33364 sci.electronics.misc:19281

[e-mail] (Don Klipstein) writes: > Luiz Marcondes ([e-mail]) wrote
:
> : About a mile from my home there are four TV (channels 2, 4, 9 and 14) and
> : several broadcast FM transmitters, all working with powers in the 100+ Kw
> : ERP class.
> : Radio reception is a nightmare, mostly (I think) because of IM products
> : in overloaded front end stages. In most bands there are several regions
> : at a spacing of about 100Khz, each 30-40 Khz wide with a harsh buzz
> : stronger than anything else.
> : Maybe a bandpass filter could alleviate the problem, but I don't know how
> : much out-of-band attenuation I'll need, any ideas?
> :
> : Luiz
>
>   If the buzz is of a frequency like the power line frequency or a
> harmonic thereof, then the nearby transmitters may not be the culprit.
> Instead, nearby corona on a high voltage power line, a nearby neon sign,
> or a nearby light dimmer may be the offender.  Although the noise from
> these is usually broadband, the noise could get concentrated into bands
> spaced 100 KHz apart if something resonant around 100 KHz is involved in
> the noise production.
>
>   I would try temporarily turning off all fluorescent lights, neon signs,
> lights with dimmers, etc. and asking your neighbors to do the same to see
> if any of these is the offender.  I have often found light dimmers to be
> major RF noise sources.
>
>   Possibly, an RF noise filter for the AC power for your receiver may help
> things.  If you isolate a single offending appliance, it may help to plug
> it into an RF noise filter.  If you use any filters with either the
> offending appliance or the receiver, try all combinations of plug reversal
> to see what works best.  Both leads of any offending appliance may not
> equally spew noise, and both lines in the filter may not equally block
> noise.  Both lines of the receiver's power cord may not equally bring
> noise into the receiver, if this is the route the noise takes.
>
>  - Don Klipstein ([e-mail] or [e-mail])



From [e-mail] Thu Jan 02 17:21:09 1997
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From: Mr Hogan <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.cb
Subject: Re: Q: Is a dipole any good for 11m?(Thankyou)
Date: Sun, 29 Dec 1996 15:04:40 -0500
Organization: AT&T WorldNet Services
Lines: 16
Message-ID: <[e-mail]>
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J&J Mac wrote:

> Sorry Michael, I guess I was being a bit sarcastic.

I hadn't noticed <g>

> One of the hottest selling 11 AND 10 meter antennas is the Antron 99.
> It is a vertical dipole that is guised as a fiberglass sectional antenna.
> For "better performance" the antron has a ground plane kit that helps
> reduce rfi by altering the radiation pattern.

How much? Sounds great!

Peace

,\\ichael


From [e-mail] Thu Jan 02 17:21:11 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Blocking ham/cb interference on stereo equipment?
Date: 29 Dec 1996 20:07:19 GMT
Organization: AOL http://www.aol.com
Lines: 10
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]
X-Newsreader: AOL Offline Reader

In article <[e-mail]>, Gary Danaher <[e-mail]>
writes:

>Yes, sticking a needle in the coax is a wonderful idea. What a lid.
>
>

Make double sure that it's a clean needle first.  Get it exchanged at the
nearest taxpayer sponsored needle exchange center.  Surely, one would not
want to use either a hepatitas (spelling?) or aids infected needle!


From [e-mail] Thu Jan 02 17:21:11 1997
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From: [e-mail] (Chris Smolinski)
Newsgroups: rec.radio.amateur.antenna
Subject: Resources on building loop antennas on the net?
Date: Sun, 29 Dec 1996 15:09:35 -0500
Organization: DIGEX
Lines: 13
Message-ID: <[e-mail]>
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X-Newsreader: Yet Another NewsWatcher 2.4.0

I'm looking for resources on the net for building loop antennas, for
receiving purposes. I'm particularily interested in the HF frequency range,
say 3-15 MHz. Larger outdoor designs are fine, I'm looking to build an
antenna suitable for RDF applications if that matters.

Thanks,

Chris
N3JLY

--
Check out my web pages for radio (pirate, spy numbers) and Mac software.
http://www.access.digex.net/~cps


From [e-mail] Thu Jan 02 17:21:13 1997
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From: [e-mail] (Radiomatt)
Newsgroups: rec.radio.amateur.antenna
Subject: YET ANOTHER BREAKTHROUGH ON FRACTALS
Date: 29 Dec 1996 22:04:19 GMT
Organization: AOL http://www.aol.com
Lines: 64
Message-ID: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

This seems to be strangely familiar. Wasn't there a similar big
announcement two or three months ago? Anyone know what this breakthrough
might be? Or is this another effort to find investors?
Matt
FT. LAUDERDALE, Fla.--(BUSINESS WIRE)--Dec. 27, 1996--Fractal  Antenna
Systems Inc., a leader in innovative antenna design, today  announced it
is developing a line of miniature, invisible antennas  for wireless and
cellular applications.

The company produces antennas with elements built upon fractal  geometric
patterns.  Fractals take a particular design and repeat it  over many size
scales.  Fractal-element antennas were invented and  perfected by Dr.
Nathan Cohen, a radio astronomer and physicist,  over the last decade.
Fractal Antenna Systems, Inc. holds  proprietary patent pending technology
on fractal-element antennas.

The line of FRACTENNA(TM) fractal antennas addresses the gamut of problems
that OEM's and consumers have with cellular and wireless  devices.
Virtually all of these transceivers, which can include cell phones,
cordless phones, LANS, computer links, trunk radios, RF  tagging, and
others, incorporate `wand' antennas which protrude from  the casing.  "Its
an invitation for disaster," says company  spokesman Phil Salkind, "they
break; have limited reliability; are  too expensive, and let's face it,
are ugly."  Wands are usually made  of a length of wire or helix.  "That's
technology which has been  around for at least 50 years," said Salkind.
"Think of it.  You've got this miracle transceiver and you make it
wireless by attaching it to a spring.  It's a techno-time warp."

Fractal Antenna Systems, Inc. uses the fractal patterns to make  much
smaller resonant antennae which have form factors that can be
incorporated in or on the casing.  "The opportunity for breakage is
virtually zero," says Salkind.  Furthermore, the size reduction is
substantial.  A typical FRACTENNA(TM) cell phone antenna easily fits  into
the flip assembly or back case.  A PCS antenna is dime-sized--or smaller.


A particular industry problem has been with making embedded  antennas
which will work on top of metal, such as shielding.  One of  the
FRACTENNA(TM) antennas in the new line is a `fractal  discontinuity
microstrip patch', also called a FRACTAL  MICROPATCH(TM).  It incorporates
the benefits of conventional patch  antennas--but at a fraction of the
size.  And it works on top of  metal.

Plans are to release a variety of the FRACTENNA(TM) lines for  cell,
wireless, and PCS in the Spring.  Realizing that some OEM's  will need
faster response, Fractal Antenna Systems, Inc. plans to  make its designs
available to a limited number of OEM's on a custom  basis before the
general release.  "This allows companies in the  early stage of their
design cycles to make their antenna decision as  soon as possible," said
Salkind.

Fractal Antenna Systems Inc., is a privately held company based  in Fort
Lauderdale, FL with R&D offices in Belmont MA.  FRACTENNA(TM) and FRACTAL
MICROPATCH (TM) are trademarks of Fractal Antenna  Systems, Inc.  Its
fractal-based antenna technology is patent  pending.

CONTACT:

Fractal Antenna Systems, Inc.

Phil Salkind, 617-489-6952

KEYWORD: FLORIDA



From [e-mail] Thu Jan 02 17:21:14 1997
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From: [e-mail] (Perry L. Vale)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Antron -99 on 17 , 15 & 12 meter ????
Date: Sun, 29 Dec 1996 22:12:51 GMT
Organization: Netspace Internet Services
Lines: 12
Message-ID: <5a6q86$[e-mail]>
References: <01bbf558$2cbf91e0$[e-mail]>
NNTP-Posting-Host: node33.salina.midusa.net
X-Newsreader: Forte Free Agent 1.0.82

"Chuck" <[e-mail]> wrote:

>It is my understanding that the A-99 is a very broadbanded antenna indeed
>but have any of you tried it at 15 & 17 meters??? I have every confidence
>at its ability to tune up for 10 -12 meters. How about 15 - 17???

I  regularly use my A-99 on all of the bands above, with a tuner. It
will even tune up on 20 meters. It's performance on 20 leaves a lot to
be desired, though.....

73 de Perry N0MXJ <[e-mail]>



From [e-mail] Thu Jan 02 17:21:14 1997
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From: [e-mail] (John P Smith)
Newsgroups: rec.radio.amateur.antenna
Subject: Battle Creek Special?
Date: 29 Dec 96 22:18:29 GMT
Organization: ucsd usenet gateway
Lines: 4
Message-ID: <[e-mail]822>
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]

Anyone have construction details on this antenna?
      73
John - KI4RO
http://www.mnsinc.com/ki4ro


From [e-mail] Thu Jan 02 17:21:16 1997
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From: [e-mail] (CHARLES J. MICHAELS)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Coax transmission line theory Q?
Date: 29 Dec 1996 22:51:17 GMT
Organization: Arizona State University
Lines: 38
Message-ID: <5a6sl5$[e-mail]>
NNTP-Posting-Host: aztec.asu.edu


Ken wrote -
Anyone know the impedance calculations for determining
an input versus output impedance given the input Z, coax
cable Z and coax length?  I've got a 50 ohm source, and
50 ohm/75 ohm coax and want to know if I can match a
~ 10,000 ohm load?  This is for a plasma experiment so
I just need some theory or a computer program - freeware.

Ken,
One well known equation for calculation of Zin is:

                               ZL + Zc (tanh(Gamma x Length))
             Zin =     _____________________________
                                           ZL (tanh(Gamma x Length))
                               1+        _______________________
                                                       Zc
Where:
    Zin = Input impedance at sending end of line (Rin + j Xin)
    ZL = Load impedance at other end of line (RLoad + j XLoad)
    Zc = Line Characteristic Impedance
    tanh = Hyperbolic tangent
    Gamma = Alpha + j Beta, the transmission line propagation
constants
    Alpha = Nepers/unit length
    Beta = Radians per unit length

      By some algebra we obtain the equation for ZL in terms of  Zin:

                               Zin + Zc (tanh(Gamma x Length))
             ZL =     _____________________________
                                           Zin (tanh(Gamma x Length))
                           - 1   +       _______________________
                                                       Zc


Charlie, W7XC
--


From [e-mail] Thu Jan 02 17:21:17 1997
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From: edwin bailen <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: WTB: "Reflections" by Maxwell
Date: Sun, 29 Dec 1996 17:15:44 -0600
Organization: Adhesive Media, Inc.
Lines: 35
Message-ID: <Pine.BSD/[e-mail]>
References: <5a0it9$[e-mail]> <[e-mail]>
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Mime-Version: 1.0
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In-Reply-To: <[e-mail]>


On 28 Dec 1996 [e-mail] wrote:

> In article <5a0it9$[e-mail]>,
> [e-mail] (Russ Renaud) writes:
>
> >
> >It's a shame the ARRL would let such a fine volume go out
> >of print!
> >
> >I seem to recall that the first 6 (??) chapters were based on
> >QST articles.  If you knew someone who had access to old QSTs,
> >you could probably have them copied.
> >
> >73 de va3rr
> >
> >
>
> It is an excellent book, but the ARRL dropped it for some internal reason.
>
> I think that World Radio Magazine is going to print it. That would nice of
> them.
>
> I would never give up my copy either!
>
> 73
> Tom
>
>
I seem to recall a thread on this group a year or so ago that the ARRL
was going to discontinue the book.  That, and the rave reviews, induced
me to snatch up a copy at the candy store.  Glad I did!

73,
Ed


From [e-mail] Thu Jan 02 17:21:18 1997
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From: "Dale R. Parfitt" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Cross Yagi
Date: Sun, 29 Dec 1996 18:16:00 -0500
Organization: PAR Electronics
Lines: 28
Message-ID: <[e-mail]>
References: <01bbf5b1$1d714680$[e-mail]>
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To: "Christopher Bolek!" <[e-mail]>

Christopher Bolek! wrote:
>
> Hello all,
>
> I am somewhat new to this newsgroup so I hope this question is not of
> "spam" quality.  :)
>
> I am looking for information (web page, email, etc.) for the logistics of
> building a cross yagi for 6 meter.  Now this is NOT going to be circular
> polarization but actual dual.  I'm going to run 2 feedlines and have
> vertical and horizontal on one boom.  I have seen this used in 2 meter and
> 11 meter for multi-mode purposes  but never 6 meter.
>
> I am looking for the construction specifics of putting both sets of
> elements on the boom and what interference I may run into.
>
> Any help will be greatly appreciated.  And if there is anything I can do
> for anyone here I will be more than happy to do what I can.  I am a
> cellular field engineer by profession and a Ham by obsession.  :)
>
> Chris, KF4GJKHi Chris,

I did this back in 1974 or thereabouts and the antenna appeared in QST
50MHz and up. 4 elements each as I recall. The results were especially
interesting on 2X Es hop. You should be able to take any Yagi design and
add the opposite elements w/ almost no upset.

73,  Dale W4OP


From [e-mail] Thu Jan 02 17:21:19 1997
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From: [e-mail] (CHARLES J. MICHAELS)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Coax transmission line theory Q?
Date: 29 Dec 1996 23:16:07 GMT
Organization: Arizona State University
Lines: 31
Message-ID: <5a6u3n$[e-mail]>
NNTP-Posting-Host: aztec.asu.edu


Correction to previous posting

One well known equation for calculation of Zin is:

                               ZL + Zc (tanh(Gamma x Length))
             Zin =     _____________________________
                                           ZL (tanh(Gamma x Length))
                               1+        _______________________
                                                       Zc
Where:
    Zin = Input impedance at sending end of line (Rin + j Xin)
    ZL = Load impedance at other end of line (RLoad + j XLoad)
    Zc = Line Characteristic Impedance
    tanh = Hyperbolic tangent
    Gamma = Alpha + j Beta, the transmission line propagation
constants
    Alpha = Nepers/unit length
    Beta = Radians per unit length

      By some algebra we obtain the equation for ZL in terms of  Zin:

                            -   Zin + Zc (tanh(Gamma x Length))
             ZL =     _____________________________
                                           Zin (tanh(Gamma x Length))
                           - 1   +       _______________________
                                                       Zc

Note minus sign before Zin in the numerator (this is correction)
Charlie, W7XC
--


From [e-mail] Thu Jan 02 17:21:20 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna,rec.radio.cb
Subject: Re: Q: Is a dipole any good for 11m?
Date: Mon, 30 Dec 1996 00:24:01 GMT
Organization:
Lines: 21
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
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Xref: news1.epix.net rec.radio.amateur.antenna:33372 rec.radio.cb:40220

[e-mail] (cathryn) wrote:

>>Is a dipole any good for 11m antenna?
>>
>
>My experience on ham bands has been that you have to spend good money to
>get an antenna that works better than a dipole.  They're cheap -- work as
>good as anything that costs 10 times as much.
>
>(Actually, I'd love to string a dipole from my office, across the street
>to my house -- but I figure it's pointless trying to go to the city to
>get a permit for this.  Oh, and ham dipoles can get big.  CB Dipole will
>be really small but should work good.)
>
You could do it with very small diameter wire. It's almost invisible
from the ground. Just make sure it's high enough to avoid any trucks
hitting it!

--
73,
Butch N2YMJ


From [e-mail] Thu Jan 02 17:21:21 1997
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From: Raj Singh <[e-mail]>
Newsgroups: rec.radio,rec.radio.amateur.antenna,rec.radio.amateur.boatanchors,rec.radio.amateur.digital.misc,rec.radio.amateur.dx,rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.amateur.misc,rec.radio.amateur.policy,rec.radio.amateur.space
Subject: Re: Pro & Cons on Cordless Telephone Headsets????
Date: Sun, 29 Dec 1996 16:31:35 -0800
Organization: CADVision Development Corp.
Lines: 13
Message-ID: <[e-mail]>
References: <01bbf576$b2ead0e0$[e-mail]>
Reply-To: [e-mail]
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Lorenzo & Katrina Baldwin wrote:
>
> Hello everyone....I hate to intrude but I'm doing some research on the
> cordless telephone headset.  Would you all please take a moment and reply
> with some pros and cons on cordless telephone headset?
>
> Thanks,
> L & K

 The biggest pro is you don't have to learn the code to operate it. The
cons is it range is very limited, seem to run FM only
Happy New Year
Raj


From [e-mail] Thu Jan 02 17:21:22 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna,rec.radio.cb
Subject: Re: Q: Is a dipole any good for 11m?(Thankyou)
Date: Mon, 30 Dec 1996 00:34:38 GMT
Organization:
Lines: 34
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]> <[e-mail]> <[e-mail]>
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Mr Hogan <[e-mail]> wrote:

>J&J Mac wrote:
>>
>> > >Is a dipole any good for 11m antenna?
>> > >
>> >
>>
>> What do you think the Antron 99 is?
>
>I haven't the slightest idea. Did you have more to add.
>
>,\\ichael
>
>As the original poster I learned:
>
>A dipole isn't really for local use on 11m(CB) but great for pulling
>in DX. A dipole can be a dream if setup correctly on 10m.(& others)
>
>Thankyou everyone who replied.
>
>Peace
>
>,\\ichael

A dipole cut for the 11 meter band, and hung VERTICALLY will perform
quite well. The coax cable must run horizontally for at least 1/4
wavelength, however. The antenna should also be at least 1/4
wavelength above the ground.


--
73,
Butch N2YMJ


From [e-mail] Thu Jan 02 17:21:23 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!news.sprintlink.net!news-peer.sprintlink.net!uunet!in3.uu.net!206.250.118.17!nntp.earthlink.net!usenet
From: [e-mail] (Michael Lewis)
Newsgroups: rec.radio.amateur.antenna
Subject: Where to put the Antenna
Date: Mon, 30 Dec 1996 00:54:05 GMT
Organization: Earthlink Network, Inc.
Lines: 12
Message-ID: <5a73mq$[e-mail]>
NNTP-Posting-Host: max1-wc-ca-48.earthlink.net
X-Newsreader: Forte Free Agent 1.0.82

I am looking for some advice regarding the best place to put a random
wire.  I am in a house that has power/phone lines running paralel.
behind it.  The phone and electric feed lines run from there to the
house.  So in effect I have power lines running n/s e/w.    If I run
the antenna n/s it paralels the incoming power.  If e/w it paralels
the power pole lines.

Rather than putting the antenna outside, my first idea was to put it
in the attic, but the 1 story house has a rock roof.  How much
decrease in signal will I experience from the rock roof.  ANY other
suggestions are welcome!   Thanks!



From [e-mail] Thu Jan 02 17:21:24 1997
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From: "Stuart, KI6QP" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: WTB:  Create VHF/UHF LPV
Date: Sun, 29 Dec 1996 17:04:28 -0800
Organization: VALON
Lines: 6
Message-ID: <[e-mail]>
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-- Wanted to buy:  Create (spelling?) 50MHz to 1300MHz log periodic V
beam antenna.  Anyone know if these are still available?
**************************************************************************
   Stuart Rumley                   Phone: [phone]           *
*       Redwood City CA 94062           e-mail: [e-mail]     *
*                                                                       +
*************************************************************************


From [e-mail] Thu Jan 02 17:21:24 1997
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From: "Stuart, KI6QP" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: WTB: Force-12 antenna
Date: Sun, 29 Dec 1996 17:07:31 -0800
Organization: VALON
Lines: 7
Message-ID: <[e-mail]>
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-- Wanted:  Force-12 beam antenna (C3 or C4)please state price and
condition.  Thanks and 73s.  .
**************************************************************************
   Stuart Rumley                   Phone: [phone]             *
*       308 Nevada Street               Fax:   [phone]             *
*       Redwood City CA 94062           e-mail: [e-mail]     *
*                                                                       +
*************************************************************************


From [e-mail] Thu Jan 02 17:21:25 1997
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From: [e-mail] (Fractenna)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: YET ANOTHER BREAKTHROUGH ON FRACTALS
Date: 30 Dec 1996 01:11:00 GMT
Organization: AOL http://www.aol.com
Lines: 19
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

Hi RadioMatt--

Companies do issue press releases occasionally. This is not the same one
as July 29.

This press release does not deal with ham radio antennas and therefore is
of limited interest to this newsgroup.

You may peruse earlier 'flame wars' on this subject by going to
'www.dejanews.com'. I will not contribute to any additional embers.

I must say, however, that I am puzzled as to why such a press release is
issued to 'get investors'  (in your opinion) when the company is privately
held.

I can be reached at [e-mail] for questions, if needed.

73
Chip N1IR


From [e-mail] Thu Jan 02 17:21:26 1997
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From: Dick Merryman <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: K7LWC "Towertalk" reflector e-mail ?
Date: Sun, 29 Dec 1996 21:17:01 -0500
Organization: 73 from N3XRU
Lines: 14
Message-ID: <[e-mail]>
References: <c=US%a=_%p=TELRAD%l=[e-mail]>
NNTP-Posting-Host: darkstar.wormhole.com
Mime-Version: 1.0
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Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.0 (Win95; I)
To: Morel Grunberg <[e-mail]>

Morel Grunberg wrote:
>
> Hello,
>
> I'm looking for the e-mail subscription adress for "Towertalk"
> reflector.
>
> 73 and "Happy New Year"
> Morel, 4X1AD
> reply to:  [e-mail]

Send the command "subscribe" to [e-mail]

                        -Dick-


From [e-mail] Thu Jan 02 17:21:28 1997
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From: [e-mail] (Kevin Shea)
Newsgroups: rec.radio.amateur.antenna
Subject: Lightning Protection Equip?
Date: Mon, 30 Dec 96 02:31:14 GMT
Organization: N9JKP
Lines: 63
Message-ID: <5a7crg$[e-mail]>
NNTP-Posting-Host: isdn14.binc.net
X-Newsreader: News Xpress Version 1.0 Beta #4

We're remodeling our house and while we were doing it I decided that I
needed to upgrade my lightning protection.  I live on the side of a hill in
a rural area in Southern Wisconsin.  I have a couple of towers, a 55' and a
25'. I  have about 10 antennas and a satellite dish (about 200' away (12'
BUD). With all the antennas control cables, telephone, and network wiring
I'm concerned for the health of the radios, computers and people residing
within.

I've got Polyphaser's book and I've read most of the articles written by
the FAA on their Florida tests a few years ago.  I've also read Gary's and
others comments here in the news areas.  I have a good grounding system
UFER in the new foundation and the tower base.

My question is: what kind of suppressor?  Polyphaser seems to be a favorite
although pricey. But what about I.C.E.'s stuff?  I've used Alpha Delta
switches and rotator (I don't think they make the rotator suppressor
anymore so I've switched to Polyphaser which is MOVs vs gas tubes in the
Alpha Delta).

Also do I need to ground the shields of the coaxes as they leave the tower?
>From the tower the cables will be running in conduit for about 20 to 40'
before they would go through a ground window with the suppressors mounted
on it. from there they will go to Alpha Delta switches which are left in
the ground position (unless I forget)when not in use, from there to the
radios.

The shack will be on a separate branch circuit ( no motors, etc.) do I need
to put an additional suppressor there?  I will have suppressors on every
wall outlet.  I'll also protect all phone, control and data lines at the
same place. Again, the Polyphaser stuff seems a bit pricey but if it is the
only reasonable alternative so be it. (Disconnecting everything is not a
reasonable alternative.)

The statistics tell me that I can expect a blast about once every four
years.  I had one 5 years ago but didn't have any equipment installed. I
just lost the microwave and a few other things that had computer chips that
weren't surge protected i.e., thermostat and central air computer control.
Since then I've bonded everything together and the following year we had a
near blast and except for some circuit breakers tripping there was no
damage... So I guess I'm about do and I want to be prepared.

Thanks for any ideas and opinions on the equipment.!

73,
Kevin N9JKP

P.S.  I've read that MOVs wear out, but when?  I know you can really tell
but should I be tossing out old surge protectors? How old?

**********************************************
Kevin G Shea, N9JKP
4460 Dahmen Pass
Cross Plains, WI 53528
Home: 608.798.4326: Fax: [phone]
**********************************************


****************************************
* Kevin G. Shea  N9JKP
* 4460 Dahmen Pass
* Cross Plains, WI 53528 USA
* 608.789.4326,voice; 608.798.0276,fax
****************************************


From [e-mail] Thu Jan 02 17:21:29 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!news.sprintlink.net!news-peer.sprintlink.net!cliffs.rs.itd.umich.edu!portc01.blue.aol.com!newstf02.news.aol.com!audrey01.news.aol.com!not-for-mail
From: [e-mail] (Ronaldw441)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Anybody work on utility poles in Indianap
Date: 30 Dec 1996 03:43:58 GMT
Organization: AOL http://www.aol.com
Lines: 14
Message-ID: <[e-mail]>
References: <59n120$[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

Is your pole actually a 60' pole, or is it 60' above ground ? Poles are
branded with their overall length (includes the buried portion). Poles
that are 40' and above are usually set at 10% of the pole length plus 2
feet (at least at the utility company that I work for). So a 60' foot pole
would be set at 8' (6' being 10% plus the 2' adder), leaving you with 52'
of wood above ground. A 55' bucket should give you enough height. Make
sure the truck is setting on level ground with the outriggers on pads on
firm ground. DO NOT WORK AROUND ANY OVERHEAD LINES !!! If you don't feel
comfortable working at this height, hire an electrical contractor. 52' is
a lot higher than you think.

Good luck & work safely.

Ron


From [e-mail] Thu Jan 02 17:21:30 1997
Newsgroups: rec.radio.amateur.antenna
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!mindspring!uunet!in1.uu.net!129.91.131.22!news.encore.com!psoper
From: [e-mail] (Pete Soper)
Subject: Re: Coax transmission line theory Q?
Organization: Encore Computer Corporation
Date: Mon, 30 Dec 1996 04:02:01 GMT
Message-ID: <[e-mail]>
X-Nntp-Posting-Host: sysgem1.encore.com
References: <5a6sl5$[e-mail]>
Sender: [e-mail] (Usenet News)
Lines: 11

[e-mail] (CHARLES J. MICHAELS) writes:
(as part of a transmission line formula)
>    tanh = Hyperbolic tangent

This is the rub for me. I have access to complex hyperbolic sin and cos
functions but no hyperbolic tangent. Is sinh(x)/cosh(x) a valid identity for
complex hyperbolic tangent? If not, could somebody help me derive this?

Regards,
Pete
KS4XG


From [e-mail] Thu Jan 02 17:21:31 1997
Path: news1.epix.net!news3.epix.net!uunet!in3.uu.net!208.195.156.10!news.walltech.com!hsnx.wco.com!news.wco.com!news
From: J&J Mac <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.cb
Subject: Re: Q: Is a dipole any good for 11m?(Thankyou)
Date: Sun, 29 Dec 1996 20:29:59 -0800
Organization: West Coast Online's News Server - Not responsible for content
Lines: 23
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]> <[e-mail]> <[e-mail]> <[e-mail]> <[e-mail]>
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To: [e-mail]
Xref: news1.epix.net rec.radio.amateur.antenna:33382 rec.radio.cb:40229

Mr Hogan wrote:
>
> J&J Mac wrote:
>
> > Sorry Michael, I guess I was being a bit sarcastic.
>
> I hadn't noticed <g>
>
> > One of the hottest selling 11 AND 10 meter antennas is the Antron 99.
> > It is a vertical dipole that is guised as a fiberglass sectional antenna.
> > For "better performance" the antron has a ground plane kit that helps
> > reduce rfi by altering the radiation pattern.
>
> How much? Sounds great!
>
> Peace
>
> ,\\ichael


They vary from place to place but I've seen them for around $50.00

Jim..


From [e-mail] Thu Jan 02 17:21:32 1997
Path: news1.epix.net!news3.epix.net!uunet!in3.uu.net!208.195.156.10!news.walltech.com!hsnx.wco.com!news.wco.com!news
From: J&J Mac <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.cb
Subject: Re: Q: Is a dipole any good for 11m?(Thankyou)
Date: Sun, 29 Dec 1996 20:31:58 -0800
Organization: West Coast Online's News Server - Not responsible for content
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[e-mail] wrote:
>
> A dipole cut for the 11 meter band, and hung VERTICALLY will perform
> quite well. The coax cable must run horizontally for at least 1/4
> wavelength, however. The antenna should also be at least 1/4
> wavelength above the ground.
>
> --
> 73,
> Butch N2YMJ

Don't limit it to 11 Butch.. I use a vertical dipole on 10 FM and it
works great for me.

Jim..


From [e-mail] Thu Jan 02 17:21:33 1997
Message-ID: <[e-mail]>
Date: Sun, 29 Dec 1996 23:43:00 -0500
From: "J. J. Fino" <[e-mail]>
X-Mailer: Mozilla 3.0 (Win95; I)
MIME-Version: 1.0
Newsgroups: rec.radio.amateur.antenna
Subject: DIRECTIONAL ELF & VLF
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Lines: 13
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!mr.net!news.idt.net!news.sprintlink.net!news-pen-16.sprintlink.net!news.rns.net!lightning.ica.net!pport12.penn.com

Calling all radio experts:

I am in need of a design for a SMALL antenna (efficiency not important)
to provide very directional (1 degree or better) receiving direction
finding; and another design which allows rather directional (prefer less
than 10 degrees if possible) transmission, both for the ELF and VLF
bands.

Any suggestions as to where I might look?

Thanks.

-JJF


From [e-mail] Thu Jan 02 17:21:34 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!node2.frontiernet.net!usenet.logical.net!dciteleport.com!feed1.news.erols.com!howland.erols.net!news.sprintlink.net!news-peer.sprintlink.net!news.sprintlink.net!news-pull.sprintlink.net!news.sprintlink.net!news-pen-16.sprintlink.net!news.electrotex.com!usenet
From: [e-mail]
Newsgroups: rec.radio.amateur.antenna,sci.electronics.misc
Subject: Re: EM hell?
Date: Sun, 29 Dec 1996 22:48:29 -0600
Organization: Electrotex, Inc.
Lines: 59
Message-ID: <[e-mail]>
References: <5a6gf8$[e-mail]>
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[e-mail] wrote:
>
> [e-mail] (Don Klipstein) writes: > Luiz Marcondes ([e-mail]) wro
te:
> > : About a mile from my home there are four TV (channels 2, 4, 9 and 14) an
d
> > : several broadcast FM transmitters, all working with powers in the 100+ K
w
> > : ERP class.
> > : Radio reception is a nightmare, mostly (I think) because of IM products
> > : in overloaded front end stages. In most bands there are several regions
> > : at a spacing of about 100Khz, each 30-40 Khz wide with a harsh buzz
> > : stronger than anything else.
> > : Maybe a bandpass filter could alleviate the problem, but I don't know ho
w
> > : much out-of-band attenuation I'll need, any ideas?
> > :
> > : Luiz
> >
> >   If the buzz is of a frequency like the power line frequency or a
> > harmonic thereof, then the nearby transmitters may not be the culprit.
> > Instead, nearby corona on a high voltage power line, a nearby neon sign,
> > or a nearby light dimmer may be the offender.  Although the noise from
> > these is usually broadband, the noise could get concentrated into bands
> > spaced 100 KHz apart if something resonant around 100 KHz is involved in
> > the noise production.
> >
> >   I would try temporarily turning off all fluorescent lights, neon signs,
> > lights with dimmers, etc. and asking your neighbors to do the same to see
> > if any of these is the offender.  I have often found light dimmers to be
> > major RF noise sources.
> >
> >   Possibly, an RF noise filter for the AC power for your receiver may help
> > things.  If you isolate a single offending appliance, it may help to plug
> > it into an RF noise filter.  If you use any filters with either the
> > offending appliance or the receiver, try all combinations of plug reversal
> > to see what works best.  Both leads of any offending appliance may not
> > equally spew noise, and both lines in the filter may not equally block
> > noise.  Both lines of the receiver's power cord may not equally bring
> > noise into the receiver, if this is the route the noise takes.
> >
> >  - Don Klipstein ([e-mail] or [e-mail])


I would not rule out the TV transmitters because of the 60 HZ buzz.  You
may be hearing horizontal sync.  First thing I would try is a low pass
filter on the antenna lead to try and get rid of some of the RF in the
receiver front end.  It is also possible that poor electrical
connections on your antenna hardware is providing a place for these
signals to mix and form the products that are bothering you.  Often
broadcasters will go off the air after midnight (sometimes only on
Monday morning for the 24 hr guys) for maintenance.  The absence of one
or more of the signals could be helpful in figuring out an approach.  I
would not hesitate to call up the stations engineering folks to find out
what their maintenance schedules are.  Chances are at least some of the
RF guys are hams themselves with a good deal of experience in keeping RF
out of where it does not belong.

Good luck,

Marty
WA5TMN
a broadcaster myself


From [e-mail] Thu Jan 02 17:21:35 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!news.kei.com!newsfeed.internetmci.com!feed1.news.erols.com!super.zippo.com!zdc!szdc!news
From: "Jamie R. Dean" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.boatanchors,rec.radio.amateur.digital.misc,rec.radio.amateur.dx,rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.amateur.misc,rec.radio.amateur.policy,rec.radio.amateur.space,rec.radio.b
Subject: Amateur Radio Files & Links (FREE)
Date: 30 Dec 1996 05:12:10 GMT
Organization: Zip News
Lines: 12
Message-ID: <01bbf60f$8d51a0e0$[e-mail]>
X-Newsreader: Microsoft Internet News 4.70.1160
Xref: news1.epix.net rec.radio.amateur.antenna:33389 rec.radio.amateur.boatanchors:1367 rec.radio.amateur.digital.misc:20965 rec.radio.amateur.dx:1722 rec.radio.amateur.equipment:45455 rec.radio.amateur.homebrew:22582 rec.radio.amateur.misc:122198 rec.radio.amateur.policy:44959 rec.radio.amateur.space:9259

Come Visit The Western North Carolina APRS & Ham Radio Home Page. There are
lots of files to download
and links to all of the hotest ham and weather web sites on the net. And
best of all it's FREE!!

The Western NC Amateur Packet/Postion Reporting System & Ham Radio Home
Page
http://www.bluenet.net/ke4htm
----------------------------------------------------------------------------
----------------------------------------------------------------------------
---



From [e-mail] Thu Jan 02 17:21:36 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!mr.net!nntp.earthlink.net!usenet
From: [e-mail] (David Rickmers)
Newsgroups: rec.radio.shortwave,rec.radio.amateur.antenna
Subject: Re: SWL pre-selector/pre-amp
Date: Mon, 30 Dec 1996 05:23:42 GMT
Organization: Earthlink Network, Inc.
Lines: 15
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: cust37.max9.los-angeles.ca.ms.uu.net
X-Newsreader: Forte Free Agent 1.1/16.230
Xref: news1.epix.net rec.radio.shortwave:91474 rec.radio.amateur.antenna:33363

MFJ-959B.
dr

On Sun, 29 Dec 1996 10:13:56 -0600, Scott Ryan <[e-mail]>
wrote:

>I'm considering a SWL pre-selector/pre-amp.  The features I'd like are;
>
>1. Able to select from two (or more) antennas from the front panel.
>2. adjustable gain/attenuator (+/- 20 db).
>3. Connections for coax w/ PL259 & a random longwire fed with
>insulated    wire.
>
>Any suggestions, good or bad, are welcome.



From [e-mail] Thu Jan 02 17:21:37 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!nntp.uio.no!news.nacamar.de!uunet!in1.uu.net!192.80.63.252!delphi.com!usenet
From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: WTB: "Reflections" by Maxwell
Date: Mon, 30 DEC 96 00:57:33 -0500
Organization: Delphi ([e-mail] email, 800-695-4005 voice)
Lines: 5
Message-ID: <[e-mail]>
References: <5a0it9$[e-mail]> <[e-mail]> <Pine.BSD/[e-mail]>
NNTP-Posting-Host: bos1e.delphi.com
X-To: edwin bailen <[e-mail]>

edwin bailen <[e-mail]> writes:

>> I think that World Radio Magazine is going to print it. That would nice of

True! Look for it Mid-1997............................de N6WR


From [e-mail] Thu Jan 02 17:21:38 1997
Path: news1.epix.net!news3.epix.net!uunet!in3.uu.net!205.252.116.190!feed1.news.erols.com!howland.erols.net!www.nntp.primenet.com!nntp.primenet.com!news.asu.edu!aztec.asu.edu!hamop
From: [e-mail] (CHARLES J. MICHAELS)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Coax transmission line theory Q?
Date: 30 Dec 1996 06:35:22 GMT
Organization: Arizona State University
Lines: 10
Message-ID: <5a7nra$[e-mail]>
NNTP-Posting-Host: aztec.asu.edu


Pete wrote -
This is the rub for me. I have access to complex hyperbolic sin and cos
functions but no hyperbolic tangent. Is sinh(x)/cosh(x) a valid identity for
complex hyperbolic tangent? If not, could somebody help me derive this?

Pete,
        Yes, that is valid.
Charlie, W7XC
--


From [e-mail] Thu Jan 02 17:21:39 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!feed1.news.erols.com!news-xfer.netaxs.com!insync!uunet!in3.uu.net!199.232.240.5!news.ziplink.net!zip1.ziplink.net!not-for-mail
From: [e-mail] (Thomas Mahanna)
Newsgroups: rec.radio.amateur.antenna
Subject: Q:Maxwell's Quarternian Equations
Date: 30 Dec 1996 01:37:41 -0500
Organization: ZIPNET.NET
Lines: 10
Message-ID: <5a7nvl$[e-mail]>
NNTP-Posting-Host: zip1.ziplink.net
Mime-Version: 1.0
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X-Newsreader: TIN [UNIX 1.3 unoff BETA release 961203]


Hi:
        On a radio talk show, I heard a gent mention that J.C. Maxwell's
original works included more than 200 equations, other than the 4 basic
equations taught to EEs. These were said to expressed using Quarternians
which I understand to be differential equations. Is there any truth to
this, or is it a mere speculation?

-Tom



From [e-mail] Thu Jan 02 17:21:41 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!mr.net!news.maxwell.syr.edu!news.nacamar.de!news-feed.inet.tele.dk!arclight.uoregon.edu!feed1.news.erols.com!news.idt.net!nntp-hub.idt.net!nntp.farm.idt.net!styx.ios.com!not-for-mail
From: Peter Costello <[e-mail]>
Newsgroups: rec.radio.shortwave,rec.radio.amateur.antenna
Subject: Re: SWL pre-selector/pre-amp
Date: 30 Dec 1996 07:58:35 GMT
Organization: You gotta be kidding
Lines: 31
Message-ID: <5a7snb$[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: styx.ios.com
X-Newsreader: TIN [UNIX 1.3 unoff BETA release 961025]
Xref: news1.epix.net rec.radio.shortwave:91512 rec.radio.amateur.antenna:33388

In rec.radio.shortwave Scott Ryan <[e-mail]> wrote:
: I'm considering a SWL pre-selector/pre-amp.  The features I'd like are;

: 1. Able to select from two (or more) antennas from the front panel.
: 2. adjustable gain/attenuator (+/- 20 db).
: 3. Connections for coax w/ PL259 & a random longwire fed with
: insulated    wire.

: Any suggestions, good or bad, are welcome.

--

      The Grove TUN4A seems to have all these features. I use it to
tune out some local NY City AM stations that creep into my shortwave
dial from time to time.

       Kim Andrew Elliot of VOA's Communication's World has one too.
Seems he has moved under the antennas of some powerhouse transmitters
in the Washinton DC area. He has reported success in tuning down, if
not out, his problems by using it.

       Check http://www.grove.com/ for details on how to get more info,
catalogs and maybe they still have a write-up and pix. Checked the used
equipment list. I recall seeing a TUN4A listed about a month ago.

        Pete
---------------------------------------------------------------------------
 Pete Costello -        Shortwave/Radio Catalog  http://itre.ncsu.edu/radio/
 E-mail: [e-mail]    WRTH 1997 New Media Award            ^^^^
                        Internet World Magazine's Best of the 1996 Web, Jan. 9
7
 "In the future everyone will be famous for 15 Megabytes" - Rocktopolis Inc.


From [e-mail] Thu Jan 02 17:21:42 1997
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!zombie.ncsc.mil!newsgate.duke.edu!news-feed-1.peachnet.edu!usenet.eel.ufl.edu!news-peer.gsl.net!news.gsl.net!news-lond.gsl.net!news.gsl.net!netcom.net.uk!dispatch.news.demon.net!demon!ifwtech.demon.co.uk!ifwtech.demon.co.uk!G3SEK
From: "Ian White, G3SEK" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Lightning Protection Equip?
Date: Mon, 30 Dec 1996 08:15:47 +0000
Organization: IFW Technical Services
Lines: 21
Distribution: world
Message-ID: <L+R$[e-mail]>
References: <5a7crg$[e-mail]>
NNTP-Posting-Host: ifwtech.demon.co.uk
X-NNTP-Posting-Host: ifwtech.demon.co.uk
MIME-Version: 1.0
X-Newsreader: Turnpike Version 3.01 <9qI82xurdT5+zee3Wovwfh3yMs>

Kevin Shea wrote:

>P.S.  I've read that MOVs wear out, but when?  I know you can really tell
>but should I be tossing out old surge protectors? How old?

Please can we have any genuine, quotable literature references to this
phenomenon - as opposed to technical folklore?

Harris-GE deny that there are any significant changes in MOV
characteristics due to multiple repeated discharges within the ratings
of the device.

In the extreme, the disk of MOV material can be physically ruptured by a
discharge in excess of its ratings (usually lightning-related - tell us
about it, Mike and Gary!) but that's a different story.


73 from Ian G3SEK          Editor, 'The VHF/UHF DX Book'
                          'In Practice' columnist for RadCom (RSGB)
Professionally:
IFW Technical Services     Clear technical English - world-wide.


From [e-mail] Thu Jan 02 17:21:43 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!news.sprintlink.net!news-pull.sprintlink.net!news.sprintlink.net!news-peer.sprintlink.net!howland.erols.net!news.bbnplanet.com!cam-news-hub1.bbnplanet.com!uunet!in2.uu.net!152.163.170.17!newstf01.news.aol.com!audrey01.news.aol.com!not-for-mail
From: [e-mail] (K6OY)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 2.4 GHz and 5.6 GHz Omni Antennas
Date: 30 Dec 1996 08:56:08 GMT
Organization: AOL http://www.aol.com
Lines: 6
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

I am VP of Engr at a company called Tecom in Chatsworth, Ca. We have
numerous directional and omni antennas @ 2.4 and 5.8 GHz with gains from 6
to 24 dB, vertical and circular polarization.

Contact me at [e-mail] or here at [e-mail].
Regards, Bruce Bishop


From [e-mail] Thu Jan 02 17:21:44 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!news.sprintlink.net!news-pull.sprintlink.net!news.sprintlink.net!news-peer.sprintlink.net!news-peer.gsl.net!news.gsl.net!usenet.eel.ufl.edu!dpf
From: [e-mail] (David P. Fraleigh)
Newsgroups: rec.radio.amateur.antenna
Subject: need to ground rooftop T.V. antenna?
Date: 30 Dec 1996 09:28:16 GMT
Lines: 7
Message-ID: <5a81vg$[e-mail]>
NNTP-Posting-Host: freenet2.afn.org
NNTP-Posting-User: dpf
X-Newsreader: TIN [version 1.2 PL2]

Is grounding a rooftop T.V. antenna necessary?  Is it something that
people do to limit lightning damage or is it actually helpful for
reception of the broadcast signal?  Thanks David...

--




From [e-mail] Thu Jan 02 17:21:45 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!news.sprintlink.net!news-pull.sprintlink.net!news.sprintlink.net!news-peer.sprintlink.net!howland.erols.net!worldnet.att.net!newsadm
From: Michael <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 2 meter, 440 mhz, antenna??
Date: 30 Dec 1996 11:41:17 GMT
Organization: AT&T WorldNet Services
Lines: 6
Message-ID: <5a89ot$[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: 207.116.32.6
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 1.22ATT (Windows; U; 16bit)
To: [e-mail]

Hello
  I used for years a 19 inch 2 mtr 1/4 wave antenna for both 2 mtrs and
440 works like a charm. No gain on 2mtrs a bit of gain on 440.Cheap as
hell and hard to see.
                                      Mike WB2GLW



From [e-mail] Thu Jan 02 17:21:46 1997
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!news.sprintlink.net!news-pen-14.sprintlink.net!news.magicnet.net!feed1.news.erols.com!howland.erols.net!EU.net!uknet!usenet1.news.uk.psi.net!uknet!dispatch.news.demon.net!demon!genesys.demon.co.uk!genesys.demon.co.uk!duncan
From: "Dr. Duncan Clark" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Anyone try 1.5 KW into TA 33 Junior beam?
Date: Mon, 30 Dec 1996 14:12:27 +0000
Organization: GeneSys Ltd
Lines: 20
Distribution: world
Message-ID: <[e-mail]>
References: <[e-mail]>
 <59sol2$lha$[e-mail]>
NNTP-Posting-Host: genesys.demon.co.uk
X-NNTP-Posting-Host: genesys.demon.co.uk
MIME-Version: 1.0
X-Newsreader: Turnpike Version 3.01 <FisJ$g85515TySgFcN46Q0hYVr>

In article <59sol2$lha$[e-mail]>, [e-mail] writes
>>Wondering if anyone has tried loading up a Mosely TA33 Jr. or TA33 Jr WARC
>>(this is what I've got) to 1.5 kilowatts PEP SSB. I know they are rated
>>for 1.2 kw on ssb and 500 watts on cw, but I'm wondering if there is
>>enough tolerance +/- for occaisional full legal output on ssb.

I haven't worked it out, but going from 1.2kw to 1.5kw isn't going to
make any real differrence at the received end of the QSO!

Duncan

------------------------------------------------------------------------------
--
The problem with being on the cutting edge is that you occasionally get
sliced from time to time....

Dr. Duncan Clark
DNAmp Ltd.
TEl/FAX [phone]
http://www.dnamp.com
http://www.genesys.demon.co.uk


From [e-mail] Thu Jan 02 17:21:47 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!newspump.sol.net!newsfeeds.sol.net!news-xfer.netaxs.com!netnews.upenn.edu!news.misty.com!news.ipass.net![e-mail]
From: "David A. Cooley" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: HTX202 & 404Antennas
Date: Mon, 30 Dec 1996 09:37:27 -0500
Organization: IPass.net
Lines: 22
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]> <01bbf40f$c7545460$[e-mail]> <[e-mail]> <5a26iu$[e-mail]> <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: customs217.ipass.net
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.01 (Win95; I)

[e-mail] wrote:
>
>Sorry guys Iv' worked Hawaii with my rubber duck. Only once grant you.
> Pure luck but it was with a rubber duck. and HTX 202

Were you on a sail boat near there? 2m just doesn't have the propogation
to do that if you were on the mainland US... Another possibility may
have been a linked repeater to a lower band.  With My HTX-202 while in
the car from NC, talked to Gull Bay, Ontario, Canada and the northern
peninsula of Michigan.  All because one of our local repeaters is linked
to 10m and the 10m band opened up.

Later,
Dave


--
========================================================================
David Cooley N5XMT                  Packet: N5XMT@W4RAL.#RTP.NC.USA.NOAM
Internet: [e-mail]    And Web: http://www.ipass.net/~cooldave/
Sponges grow in the ocean... Wonder how deep it would be if they didn't!
========================================================================


From [e-mail] Thu Jan 02 17:21:48 1997
Path: news1.epix.net!news3.epix.net!uunet!in3.uu.net!205.252.116.190!feed1.news.erols.com!news-xfer.netaxs.com!news.voicenet.com!netnews.upenn.edu!news.misty.com!news.ipass.net![e-mail]
From: "David A. Cooley" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Mobile antenna for HT 2m/70cm dual bander
Date: Mon, 30 Dec 1996 09:41:27 -0500
Organization: IPass.net
Lines: 35
Message-ID: <[e-mail]>
References: <5a51va$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: customs217.ipass.net
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.01 (Win95; I)
To: Dave Rugh <[e-mail]>

Dave Rugh wrote:
>
> I'd like to put up a mobile antenna on my Honda Civic to boost the signal on
> my YAESU FT50R HT dual bander operating on the 2m and 70cm bands.  On an
> earlier thread Diamond and Larson mobile antennas for a pickup truck; from
> other sources I've heard Comet antennas are good. The main reason for gettin
g
> the antenna is to hit an autopatch more clearly although I can get through t
o
> local repeaters with my rubber ducky pretty well here in Orange County, CA.
>

Hi Dave,
I have a Larsen 2m thru the glass antenna... Mounts like a cell phone
ant, one block sticks to the outside of the glass, the other (With the
coax) mounts to the inside of the glass.  They make a 2m/70cm combo that
I hear works as good as the 2m on both bands... I've had really good
luck with it.

> Has anyone had experience using an amp to boost the power from an HT in mobi
le
> operation?  Right now the HT puts out a max 5 watts of power.

I had a 50w amp I built on my HT back in TX... I can really say it
didn't help much, as you can only talk to who you can hear.  I could
talk to anyone I was receiving with the HT by itself.

Take care,
Dave



--
========================================================================
David Cooley N5XMT                  Packet: N5XMT@W4RAL.#RTP.NC.USA.NOAM
Internet: [e-mail]    And Web: http://www.ipass.net/~cooldave/
Sponges grow in the ocean... Wonder how deep it would be if they didn't!
========================================================================


From [e-mail] Thu Jan 02 17:21:49 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.misc,misc.jobs.offered,rec.radio.amateur.antenna,us.jobs.offered,ne.jobs,nyc.jobs
Subject: NY;Chief Engineeer; UHF transmitter, Broadcasting, Television
Date: 30 Dec 1996 16:10:43 GMT
Organization: Career Marketing Associates
Lines: 20
Message-ID: <5a8pi3$[e-mail]>
NNTP-Posting-Host: 206.247.5.4
Xref: news1.epix.net rec.radio.amateur.misc:122236 misc.jobs.offered:1833659 rec.radio.amateur.antenna:33399 ne.jobs:188049


NY;Chief Engineeer; UHF transmitter, Broadcasting, Television. An experienced
chief engineer with excellent technical knowledge of UHF transmitter operation

and maintenance. Experience in installation and maintenance of studio,
production, master control microwave systems is essential. Applicant will
implement preventive maintenance programs and be responsible for staffing,
supervision and building maintenance. General license required. SBE certificat
e
a plus. Corporate position. Very minimal travel. Our client is located
in Southern NY state; right at the Southern edge of the beautiful Catskill
Mountains.

Please refer to JO# 963RJS in your response.



Richard Steinman
Project Leader
[e-mail]
IT & Software Solutions Team
Career Marketing Associates


From [e-mail] Thu Jan 02 17:21:50 1997
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From: [e-mail] (Fractenna)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: NY;Chief Engineeer; UHF transmitter, Broadcasting, Television
Date: 30 Dec 1996 17:05:39 GMT
Organization: AOL http://www.aol.com
Lines: 8
Message-ID: <[e-mail]>
References: <5a8pi3$[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

Hi Richard--

There are other newsgroups dealing with radio that might be more
appropriate. No mention of 'antennas' in the job description for example.

Good luck!

Chip N1IR


From [e-mail] Thu Jan 02 17:21:51 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Mobile antenna for HT 2m/70cm dual bander
Date: 30 Dec 1996 17:12:23 GMT
Organization: AOL http://www.aol.com
Lines: 64
Message-ID: <[e-mail]>
References: <5a51va$[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]
X-Newsreader: AOL Offline Reader

In article <5a51va$[e-mail]>, [e-mail] (Dave
Rugh) writes:

>d like to put up a mobile antenna on my Honda Civic to boost the signal
on
>my YAESU FT50R HT dual bander operating on the 2m and 70cm bands.  On an
>earlier thread Diamond and Larson mobile antennas for a pickup truck;
from
>other sources I've heard Comet antennas are good. The main reason for
getting
>
>the antenna is to hit an autopatch more clearly although I can get
through to
>
>local repeaters with my rubber ducky pretty well here in Orange County,
CA.

Small dropouts can destroy the ability of a handheld with a rubber duckie
antenna in the car to respond to or terminate an autopatch.  You
apparently haven't been embarrased yet, and had to ask someone else to
take down the autopatch for you.  You definitely need an outside antenna.
The cheapest commercial antenna that I know of is the $14.95 dual band
antenna from MFJ.  It works rather well on a honda civic (I know, my wife
has a honda, and that's the antenna I presently use when I drive it).
Almost any of the dual band antennas will work.  The MFJ doesn't have gain
on 2 meters, but it does radiate like a quarterwave antenna, and it looks
like a mag mount cellular antenna.  The truth is that almost any
commercial or homebrew design will work rather well at HT power levels as
long as the SWR isn't too high on either band.  By now, someone else
should have told you that using a rubber duckie antenna in a car is a no
no.  You drop out if you talk a lot or go someplace different, and you
don't hear as well either.
>
>What is intermod BTW?

Simple description, it's when you pick up signals that aren't near the
frequency you're listening to.  If you want to really research it, try
intermodulation.  The best cure is a bandpass filter for the receiver that
you're using, as it means that your receiver is responding to signals that
you don't want to hear.  The front ends of many amateur rigs respond
rather nicely to such signals, and when you hear paging signals, or cabs
being dispatched on 145.31 or whatever amateur frequency, you'll
experience intermod for yourself.  Unfortunately, the better the antenna,
the better the pickup of intermod.
>
>Has anyone had experience using an amp to boost the power from an HT in
>mobile
>operation?  Right now the HT puts out a max 5 watts of power.

Yes, there are numerous HT amplifiers available,   They mostly work, and
will give you a vast increase in range that you conduct simplex QSO's on
or get into a repeater reliably.  I can't really say anything good about
the practice of including a receiver preamp in most amplifiers as that
practice tends to make intermod worse, and also increases the response to
spurious signals.  They work well, but remember, you'll probably also need
a speaker mike too, if you're going to use an HT in the car, rather than
holding the large HT up.  You also won't switch frequencies inadvertently
quite so often.  Incidentally, by the time you add up the cost of an
amplifier, HT, and speaker mike, you've exceeded the cost of a comparable
mobile rig.  What you can't do with the mobile rig though is walk down the
street and talk without making extensive changes in your operating
practices.  73 de n8blk/3 -art clemons-




From [e-mail] Thu Jan 02 17:21:53 1997
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From: ehretg <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Antenna for GE Superadio
Date: Mon, 30 Dec 1996 12:59:59 -0500
Organization: msu
Lines: 8
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Can anyone suggest the best type and source for an external antenna on a
GE Superadio?  I am looking for something directional like a ferrite rod
or a loop that will pull in distant AM (medium wave) stations.

Has anyone had experience with the 'Loopyloop' antenna from Great
Britain?

Thanks,


From [e-mail] Thu Jan 02 17:21:54 1997
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From: "Ronald D. Lucier" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: question  butternut hf5v
Date: Mon, 30 Dec 1996 10:52:09 -0800
Organization: Optical Hybrids, Inc.
Lines: 14
Message-ID: <[e-mail]>
References: <[e-mail]>
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To: [e-mail]

[e-mail] wrote:
>
> does anyone know how to install the 17 and 12 meter add on to this
> antenna  got the antenna used any don't have any paperwork on this
> part of the antenna???
> brian  N2MLP
>
> PS:  anyone know abount the six meter kit ????

Don't know about the 6 meter kit.  Have the manual & a beam (for sale).
Send me your fax # or your address and I'll send it along.  You can also
call Bencher at (630-238-1183) for parts, etc.

73 de WA1UWZ, Ron


From [e-mail] Thu Jan 02 17:21:55 1997
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From: "Randall J. Zaleschuk" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: 2-Meter Vertical Antenna Plans - HELP!
Date: 30 Dec 1996 20:33:23 GMT
Organization: Ainsworth Lumber Co. Ltd.
Lines: 29
Message-ID: <01bbf691$de9ad340$c9f13cc7@alc-pc01>
NNTP-Posting-Host: attos.bctel.net
X-Newsreader: Microsoft Internet News 4.70.1155

Hello from the snowy (cold) Cariboo region of British Columbia!

I want to build a vertical 2-meter antenna for my home station.

Currently, I am using a 1/4 wave mobile antenna on a base with four sloping
radials mounted on a five foot mast on the side of my house (this is a very
small antenna which eliminates any need for guy wires).

I would like a simple design that will give me a good swr match and
relatively good signal in all directions.  I am trying to work repeaters in
various directions, some at a distance of 60 miles, with only five watts
out (I only have a 3 amp power supply).  I find it a challenge to work
repeaters at a distance with QRP.

Everyone I talk to tell me to build a small quad beam, but I don't have a
rotor and running outside in the -36 degree temperature to turn a beam by
hand is a real pain in the neck.

Small design (perhaps 1/2 wave or 5/8 wave or ??) with some gain and lets
"Keep It Simple"

Please email me your plans or suggestions:  [e-mail].

Thanks for your help.

73s
Randy - VE7ERZ
[e-mail]
ps:  Happy New Year Everyone!


From [e-mail] Thu Jan 02 17:21:56 1997
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From: [e-mail] (Pat Barthelow)
Newsgroups: rec.radio.amateur.antenna
Subject: Large Wire Yagis
Date: 30 Dec 96 21:03:33 GMT
Organization: ucsd usenet gateway
Lines: 67
Message-ID: <[e-mail]>
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]

Wire Yagi Experts?

          We at Marina Ca, (N6IJ Club Station) have a large converted
MARS radio station site which provides a opportunity to build a large
wire yagi array, possibly on 2 bands, (40 meters, 7 elements, 20
meters, 10 to 15 elements) pointed to Europe.  There exist 4
wooden poles, 65 feet high, forming a rectangle 72 feet wide, by
350 feet long.  If we guy them, and connect the poles with a
structural member (probably 5/16" ehs strand) from the power
company which is already available, we are contemplating
supporting the 2 large yagi arrays.  A number of questions need to
be answered before proceeding..... and we are looking for some
outside input.

1.        Will a grounded steel strand, structural member in the vicinity
          of, but separated by approximately 20 feet from the tips of the
          wire yagi (20 meter) elements, adversely affect the
          performance of the yagi?  By how much? (In the case of 40
          meters the distance between the tips of the 40 meter yagi, and
          the continuous strand will closer, about 5-10 feet.

2.        Can we place a 20 meter yagi (possibly 8 to 12 elements) in
          front of, and collinear with the "boom" of the 40 meter yagi
          with relatively small separation without adversely affecting
          either's performance?

3.        The poles' long axis points to Europe (N 30 deg E), but they are
          on a slight vertical incline, about 5 degrees uphill slope to
          Europe.  (Southwesterly ground elevation is 150 ft. MSL, and
          Northeasterly ground end is 180 ft. MSL, in 350 foot span, a
          30 foot rise in a 350 foot run.  The yagi arrays, would be more
          or less parallel to the ground below them, making a "boom"
          angle of 5 degrees, to the horizontal.   At the director
          (Northerly) end, there is a flat plateau hilltop that the whole
          antenna would illuminate, even the lower (reflector) end.  The
          arrays would be about 55 to 60 ft above ground.  Would the
          up-tilt of the boom add terribly to the vertical angle of radiation
          of the array, compaed to a flat, level, yagi array?
4.               Are there bandwidth problems with wire yagis, being that the
          wire diameter is quite smaller than more typical, aluminum
          tubing elements?  We will use #10 Copperweld.  Any way to
          have an acceptable match on both phone and CW ends of 20
          and 40 meters?

5.        I have a detailed land countour map, with  pole locations, that
          could be used for a terrain-yagi model.  Anyone interested in
          modelling this?

6.        If/when we complete this monster, we would like to invite
          contesters/DXers to visit and use the station, already equipped
          with KW rigs, 6-30mHz Log Periodics, and a Discone (80 - 10
          meters).  Contact me if you want to come down to operate, or
          help construct these yagis....


7.        Is it manageable/sensible to create such a large wire yagi
array?
          What are the problems?  If you have EXPERIENCE in WIRE
          yagis, please advise.  The poles are sturdy, in good shape,
          class 2, 70 foot poles, buried in the solid sandy ground about
          9 feet, and will be guyed.  We may need a stuctural engineer
          to alalyze the forces involved in this wire yagi array.

73, DX, de Pat, [e-mail]
AA6EG;  Trustee for N6IJ.
Marina CA.



From [e-mail] Thu Jan 02 17:21:57 1997
Newsgroups: rec.radio.amateur.antenna
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From: Jim Rodenkirch <[e-mail]>
Subject: Force 12 zr3
Content-Type: text/plain; charset=us-ascii
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Does anyone have any info or experience with this Force vertical
antenna?

Jim Rodenkirch, K9JWV


From [e-mail] Thu Jan 02 17:21:58 1997
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From: Ron Stordahl <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: 80 meter vertical vs dipole
Date: Mon, 30 Dec 1996 16:30:01 -0600
Organization: Minnesota Regional Network (MRNet)
Lines: 24
Message-ID: <[e-mail]>
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I am considering putting up a 1/4 wave vertical this summer.  From
reading other posts here it appears the shunt fed is prefered to the
insulated type.  I also realize that a fair number of radials will be
required.  I should point out that my only interest is DX.  Here are
some questions for the experienced:

1.  Is this likely to be a better performer than my current dipole, the
center of which is at 80 feet and ends at 60 feet.

2.  How broad banded is such an antenna likely to be?  I would like to
work from 3500 to 3850.  I prefer all the tuning to be automatic using
my Alpha 87A.  Is this expecting too much?

3.  Would using the same vertical also on 160 be realistic.  I don't
believe I can make this antenna 120 feet tall, but perhaps 80 feet will
be possible.  Would increasing the height above 1/4 wave length on 80 in
order to make 160 better work against me on 80.  80 being more important
to me than 160.

4.  A 4 square is not possible, so lets not bring that up at all.

Awaiting answers.

Ron N5IN


From [e-mail] Thu Jan 02 17:22:00 1997
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From: "Willems" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 80 meter vertical vs dipole
Date: 30 Dec 1996 22:53:48 GMT
Organization: Telebyte
Lines: 18
Message-ID: <01bbf6a4$2e2ea960$c3d7ebc2@viking>
References: <[e-mail]>
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X-Newsreader: Microsoft Internet News 4.70.1155

Dear Ron,

I have taken a close look at this topic a long time ago.

Try to find a remotely controled tunable coil (was made in Germany).

If you are able to create a good ground you will have an exelent
performance on your TX.

You RX however will be very noisy !!! You might consider to use a small
"active" dipole on a rotor.

Hope this helps,


Roger Willems

The Netherlands.


From [e-mail] Thu Jan 02 17:22:01 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: HTX202 & 404Antennas
Date: Mon, 30 Dec 1996 15:03:17 -0800
Organization: SCVNET
Lines: 22
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]> <01bbf40f$c7545460$[e-mail]> <[e-mail]> <5a26iu$[e-mail]> <[e-mail]> <[e-mail]>
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David A. Cooley wrote:
>
> [e-mail] wrote:
> >
> >Sorry guys Iv' worked Hawaii with my rubber duck. Only once grant you.
> > Pure luck but it was with a rubber duck. and HTX 202
>
> Were you on a sail boat near there? 2m just doesn't have the propogation
> to do that if you were on the mainland US... Another possibility may
> have been a linked repeater to a lower band.  With My HTX-202 while in
> the car from NC, talked to Gull Bay, Ontario, Canada and the northern
> peninsula of Michigan.  All because one of our local repeaters is linked
> to 10m and the 10m band opened up.

It could happen on 2.  Here in LA we had an extraordinary opening on 2
to Hawaii last year.  Folks were working Hawaii through the local
repeaters and I don't doubt that it would have been possible to work
them with an HT direct if you were in the right place at the right
time.  Usually the ducting folks have to be down near the water, but in
this case some of the high-level repeaters got into the action.

George Lyle, N7TNJ


From [e-mail] Thu Jan 02 17:22:02 1997
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From: [e-mail] (Jim Sheffield)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 80 meter vertical vs dipole
Date: Mon, 30 Dec 1996 23:42:29 GMT
Organization: MindSpring Enterprises, Inc.
Lines: 43
Message-ID: <5a9k24$[e-mail]>
References: <[e-mail]>
Reply-To: [e-mail]
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X-Server-Date: 30 Dec 1996 23:43:00 GMT
X-Newsreader: Forte Free Agent 1.0.82

Ron Stordahl <[e-mail]> wrote:

>1.  Is this likely to be a better performer than my current dipole, the
>center of which is at 80 feet and ends at 60 feet.

Not a chance.  Vertical antennas are always inferior to dipoles
and inverted vees.  Most hams would donate a body part to
have your 80M dipole setup.  If you want to optimize the vertical
for DX work, elevate it to your roof level (or higher) and install
an artificial ground system to get the lowest possible angle of
radiation.  Still won't perform as well as the wire, though, and
will be considerably noisier (and look atrocious, to boot).

>2.  How broad banded is such an antenna likely to be?  I would like to
>work from 3500 to 3850.  I prefer all the tuning to be automatic using
>my Alpha 87A.  Is this expecting too much?

You will have trouble tuning it and getting a suitably low SWR.  It
won't be as broad as the dipole, in any event.

>3.  Would using the same vertical also on 160 be realistic.  I don't
>believe I can make this antenna 120 feet tall, but perhaps 80 feet will
>be possible.  Would increasing the height above 1/4 wave length on 80 in
>order to make 160 better work against me on 80.  80 being more important
>to me than 160.

Can't say.  You'd be better off not feeding the vertical, but using it

as a mast to provide an attachment point for a wire sloper antenna
for 160.

>4.  A 4 square is not possible, so lets not bring that up at all.

>Awaiting answers.

Don't have any "answers", and I'd be skeptical of anyone who
offers them.  These are my impressions from 33 years of chasing
DX.  YMMV and caveat emptor.

GL and 73 de Jim, KB7ET





From [e-mail] Thu Jan 02 17:22:03 1997
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From: Mike Urso <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: need to ground rooftop T.V. antenna?
Date: Mon, 30 Dec 1996 16:47:10 -0800
Organization: FERMILAB, Batavia, IL
Lines: 16
Message-ID: <[e-mail]>
References: <5a81vg$[e-mail]>
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David P. Fraleigh wrote:
>
> Is grounding a rooftop T.V. antenna necessary?  Is it something that
> people do to limit lightning damage or is it actually helpful for
> reception of the broadcast signal?  Thanks David...
>
> --

Do a test, use a reference signal.  I think you'll find the grounded
performance better than the ungrounded.  In my case, using simple
multi-band dipoles, the good ground gave a 2 S unit increase in received
signal strength.  The rule is to ground everything, and I try to stick
with it.  It hasn't failed yet.


                        Mike KB9KFE


From [e-mail] Thu Jan 02 17:22:04 1997
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From: Grant Youngman <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: G5RV FACTS
Date: Mon, 30 Dec 1996 18:48:14 -0600
Organization: GTE Intelligent Network Services, GTE INS
Lines: 34
Message-ID: <[e-mail]>
References: <5a1iok$[e-mail]> <5a4lon$[e-mail]>
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[e-mail] wrote:

> With very little feedline loss (less than .1 dB) I measure the following
> SWR on a G5RV 50 feet high:
>
> 3520    2.2:1
> 7715    1:1     (highest 40 meter SWr is 3:1 at 7000
> 14000   1.7:1 (the design frequency)
> 19818   1.1:1 (18 Mhz and 21.5 MHz is less than 3.5 :1)
> 24528   2.2:1 (24 MHz warc SWR is 2.9:1 at worse spot)
> 31480   1.3:1 (not so good on ten meters, antenna is too narrow up

The problem here ought to be obvious from a practical perspective.  THe
numbers you see on your installation are not very friendly to the
typical tuner-in-the-box radio.  Most of the questions I see related to
the G5RV are of the form "gee, my Ricenboxen Z2800a won't tune into my
G5RV .. isn't the G5RV supposed to work on ALL bands?"

Too many guys who don't have a few basics figured out don't understand
that their new radio's internal tuner won't tune a G5RV across the full
spectrum from DC to light, and can't figure out why the SWR protection
circuitry drops their output power to zip at the low end of 40 meters
(and most other places as well).  So we see long discussions about
whether the matching section being 1/2 inch too short is going to ruin
the "all band performance".

I realize the problems people have with the antenna stem from ignorance,
but the G5RV does have a highly UNDESERVED reputation as as an
out-of-the-box all band antenna, and keeps giving out the old "gotcha!".
Which doesn't imply it isn't a good compromise as long as its
limitations and operating parameters are understood -- and as long as
the user bothers to bother with a decent tuner.

Grant/NQ5T


From [e-mail] Thu Jan 02 17:22:05 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Mobile antenna for HT 2m/70cm dual bander
Date: Tue, 31 Dec 1996 01:40:31 GMT
Organization: XMission Internet (801 539 0900)
Lines: 33
Message-ID: <5a8d4c$[e-mail]>
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[e-mail] (Gary Fiber) wrote:

>[e-mail] (Dave Rugh) wrote:


>On my business trips I carry a carefully tuned  Larsen 2 meter quarter wave
>antenna on a magnet mount.  I tuned it for 146.000 MHz and it works flawlessl
y
>on 440 MHz.  The match on 440 Mhz is less than 1.5 to 1.  Of course there are
>some fancy small dual band antennas that may have some gain.

I also carry a Laren 2meter Quarter wave mag mouut for business trips.

>>Has anyone had experience using an amp to boost the power from an HT in mobi
le
>>operation?  Right now the HT puts out a max 5 watts of power.

>I have used a amplifier with a 2 meter handheld, worked fine.  You should
>connect it directly to the battery though.

I also carry a 5watt in - 35watt out amplifier-preamp ((2meter only)
on business trips.  I have made the necessary power connections so the
external power supply for the radio (Icom 2GAT) and the amp go into
the cigerette adapter of the rental car.    I then use a mic-speaker
handset.  I have had no problems with this setup and everything takes
about three minutes to install and everything fits into the suitcase
for air travel.  I take a couple of battery packs for use when I am in
the motels.

Ross
>Gary






From [e-mail] Thu Jan 02 17:22:05 1997
From: [e-mail] (Charles Hellman)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Ham-Ant Digest V96 #932 losses in triband yagi traps
Date: 31 Dec 96 01:53:12 GMT
Organization: ucsd usenet gateway
Lines: 19
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!express.ior.com!cnn.isc-br.com!news.dsource.com!news-out.internetmci.com!news.internetMCI.com!news-out.internetmci.com!uwm.edu!cs.utexas.edu!swrinde!ihnp4.ucsd.edu!news1.ucsd.edu!news-mail-gateway

Doug Hall and Martin Zl1anj inquire about losses in triband yagi traps.

Martin: you  are correct in  assumimg that the traps introduce losses.
A three element monoband yagi on 20 meters with a 14 ft boom should have a
very low impedance, not matched to 52 ohm coax, requiring  a matching
system. yet a tribander with traps  with the same boom is  sold working
with 52 ohm coax. The probable explanation is that the traps introduce
resistive losses,raising the impedance of the driven  element.
Note that most triband yagi antennas do not have a matching system, the
coax simply feeding the split driven element.
I would welcome comments.
Charlie,W2rp-









From [e-mail] Thu Jan 02 17:22:06 1997
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From: [e-mail] (Brian P. Burke)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Ham-Ant Digest V96 #925
Date: 31 Dec 96 02:20:07 GMT
Organization: ucsd usenet gateway
Lines: 12
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]

About the HTX 202 and 404 antennas.

I am astounded that some believe there are no differences between the two
antennas.  A local ham was incorrectly sold a 2m HTX 202 with the 440
antenna on it. He could hit the repeater with a rock, but couldn't keep
it open with the transmit button. He brought the radio to our weekly
luncheon, and we quickly figured out why he was having problems.  I guess
there are those people that ask why should you use a resonant antenna?
Maybe because it works better for this application?  A whole new crop of
vhf/uhf transmatches (Diawa, MFJ, others?) are being built and sold to
hapless technicians that do not understand, or  will not take a moment to
do it right the first time.  Brian/N0iMD/T


From [e-mail] Thu Jan 02 17:22:07 1997
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From: [e-mail] (BCSpain)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: HTX202 & 404Antennas
Date: 31 Dec 1996 02:57:35 GMT
Organization: AOL http://www.aol.com
Lines: 15
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

[e-mail] wrote:
> Are the antennas for the HTX 202 and 404 the exact same part?  Was told
> the antennas for these two radios were interchangeable. Doesn't make
> sense?

Absolutely NOT!  You *might* get away with using the 2m antenna on the 440
rig (not recommended) but you'll blow the finals in your 202 with the 440
antenna in short order. Inspite of what some of the folks are saying, the
antenna must match the transmitter. I agree that a rubber duck is not the
best antenna in the world, but it MUST be used on the band its designed
for or the finals will give out. (Its just like trying to use a CB antenna
on 80 meters.)

73's
Bryan  WB5YIW


From [e-mail] Thu Jan 02 17:22:09 1997
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From: [e-mail] (BCSpain)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: need to ground rooftop T.V. antenna?
Date: 31 Dec 1996 03:08:18 GMT
Organization: AOL http://www.aol.com
Lines: 12
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

David P. Fraleigh wrote:
>
> Is grounding a rooftop T.V. antenna necessary?  Is it something that
> people do to limit lightning damage or is it actually helpful for
> reception of the broadcast signal?  Thanks David...

Grounding is always a good idea. If for no other reason, it will keep your
reciever from de-sensing because of static buildup.

73's

Bryan  WB5YIW


From [e-mail] Thu Jan 02 17:22:10 1997
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From: "David A. Cooley" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Discone antenna's.
Date: Mon, 30 Dec 1996 23:09:59 -0500
Organization: IPass.net
Lines: 14
Message-ID: <[e-mail]>
Reply-To: [e-mail]
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Hello all,
Are Discone antenna's any good?  I was just given one by my dad.  It's a
radio shack model, says it is good for 25-1300 MHZ.  Also says it will
have swr below 1.5:1 on 144, 220, 440, 900 and 1296 MHZ.

Tnx,
Dave

--
========================================================================
David Cooley N5XMT                  Packet: N5XMT@W4RAL.#RTP.NC.USA.NOAM
Internet: [e-mail]    And Web: http://www.ipass.net/~cooldave/
Sponges grow in the ocean... Wonder how deep it would be if they didn't!
========================================================================


From [e-mail] Thu Jan 02 17:22:11 1997
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From: [e-mail] (Doug Hall)
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.equipment
Subject: Kenwood internal tuner on receive?
Date: Tue, 31 Dec 1996 04:47:04 GMT
Organization: IPass.net
Lines: 9
Message-ID: <[e-mail]>
Reply-To: [e-mail]
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X-Newsreader: Forte Agent .99g/32.339
Xref: news1.epix.net rec.radio.amateur.antenna:33422 rec.radio.amateur.equipment:45537

Hi all,
   Is it possible to modify the Kenwood 850 so that the internal tuner
is also active on receive? I note that the 870 allows this but I've
never seen a mod to allow it on the 850.
   Thanks & Happy New Year.
Doug Hall, KF4KL
[e-mail]
http://www.jps.com



From [e-mail] Thu Jan 02 17:22:12 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: HTX202 & 404Antennas
Date: Tue, 31 Dec 1996 05:08:28 GMT
Organization:
Lines: 24
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
NNTP-Posting-Host: dialup034.qnsbny1.capital.net
X-Newsreader: Forte Free Agent 1.1/32.230

[e-mail] (BCSpain) wrote:

>[e-mail] wrote:
>> Are the antennas for the HTX 202 and 404 the exact same part?  Was told
>> the antennas for these two radios were interchangeable. Doesn't make
>> sense?
>
>Absolutely NOT!  You *might* get away with using the 2m antenna on the 440
>rig (not recommended) but you'll blow the finals in your 202 with the 440
>antenna in short order. Inspite of what some of the folks are saying, the
>antenna must match the transmitter. I agree that a rubber duck is not the
>best antenna in the world, but it MUST be used on the band its designed
>for or the finals will give out. (Its just like trying to use a CB antenna
>on 80 meters.)
>
>73's
>Bryan  WB5YIW

I think you will find, Bryan, that if you check further you will find
out that they are exactly the same part.

--
73,
Butch N2YMJ


From [e-mail] Thu Jan 02 17:22:12 1997
Path: news1.epix.net!news3.epix.net!uunet!in1.uu.net!192.80.63.252!delphi.com!usenet
From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: G5RV FACTS
Date: Tue, 31 DEC 96 00:19:24 -0500
Organization: Delphi ([e-mail] email, 800-695-4005 voice)
Lines: 6
Message-ID: <[e-mail]>
References: <5a1iok$[e-mail]> <5a4lon$[e-mail]> <[e-mail]>
NNTP-Posting-Host: bos1b.delphi.com
X-To: Grant Youngman <[e-mail]>

Grant Youngman <[e-mail]> writes:

>> With very little feedline loss (less than .1 dB) I measure the following
>> SWR on a G5RV 50 feet high:

Kindly inform what feedline has .1 db loss in 50 feet. Thanks.


From [e-mail] Thu Jan 02 17:22:13 1997
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From: "Bill Evans" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Battle Creek Special?
Date: 31 Dec 1996 05:25:32 GMT
Organization: E B Systems Limited
Lines: 12
Message-ID: <01bbf6da$df489540$[e-mail]>
References: <[e-mail]822>
NNTP-Posting-Host: ts7m-16.mbnet.mb.ca
X-Newsreader: Microsoft Internet News 4.70.1155

There is a fairly detailed description, with some photographs, in John
Devoldere's book "Antennas and Techniques for Low Band DXing".  Also the
book on the 3Y0PI DXpedition gave comparative results between this antenna
and a Gap 160m unit (no contest).

John P Smith <[e-mail]> wrote in article
<[e-mail]822>...
> Anyone have construction details on this antenna?
>       73
> John - KI4RO
> http://www.mnsinc.com/ki4ro
>


From [e-mail] Thu Jan 02 17:22:15 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Lightning Protection Equip?
Date: 31 Dec 1996 06:37:43 GMT
Organization: DigiPhone Corporation, Bryan/College Station Texas 409-693-8885
Lines: 66
Message-ID: <5aacbn$[e-mail]>
References: <5a7crg$[e-mail]> <L+R$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: dialup506.myriad.net
X-Newsreader: IBM NewsReader/2 2.0

In <L+R$[e-mail]>, "Ian White, G3SEK" <G3SEK@ifwtech.d
emon.co.uk> writes:
>Kevin Shea wrote:
>
>>P.S.  I've read that MOVs wear out, but when?  I know you can really tell
>>but should I be tossing out old surge protectors? How old?
>
>Please can we have any genuine, quotable literature references to this
>phenomenon - as opposed to technical folklore?
>
>Harris-GE deny that there are any significant changes in MOV
>characteristics due to multiple repeated discharges within the ratings
>of the device.
>
>In the extreme, the disk of MOV material can be physically ruptured by a
>discharge in excess of its ratings (usually lightning-related - tell us
>about it, Mike and Gary!) but that's a different story.
>
>
>73 from Ian G3SEK          Editor, 'The VHF/UHF DX Book'
>                          'In Practice' columnist for RadCom (RSGB)
>Professionally:
>IFW Technical Services     Clear technical English - world-wide.

A VERY recent conversation with Stein of APC tells me that he thinks little
of the idea that MOV's deteriorate over time this way, or at least, is open to

question that they do.  He told me that in their years of experience, they do
not see that trend in the APC units either.  Of course, he and the other
engineer on the line with me earlier indicate that APC may not be using the
MOV's in the exact same way as others.  Capcitors, inductors, fuses of some
kind all come into play in their units.

Some folks argue that secret is all in the timing of life...  :)

I've never had a failure of an APC UPS unit ever, other than the battery wear
out deal...

Neither he or I had anything bad to say about Tripplite, although I do have
four of them that are blown to bits inside.

My firestarter stories trace to a statement from a friend that lost most of
their home in Huntsville, TX, allegedly from MOV failure and that was
amplified by a statement relayed to me from that friend that the Huntsville,
TX fire marshall had more of these to document.   It was NOT, as I was told,
a metal encased unit.

There is a second thread now open in the R19SYSOP area of FidoNet wherein
on professional is facing a lawsuit over specifying a surge suppressor and tha
t
the failure of it in this mode is responsible for burning down the store.

Of that I note that law isn't law until it's settled, or maybe, more properly,

well settled, one way or another, right?   In this poor integrator's plight,
I guess the opera will not be over until the tenor sings, right??

I've never personally seen a failure from 'weakenin' that I knew of.  Mine
have been all, shall we say, CATESTROPHIC failures...

I'm trying to get at the 'truth' about it all myself, howsumever, statisticaly

speaking, there are lies, damned lies and statistics....

    <chuckle>

//-----------------------------
Mike - W5WQN
[e-mail]
[e-mail]



From [e-mail] Thu Jan 02 17:22:16 1997
Path: news1.epix.net!news3.epix.net!uunet!in3.uu.net!152.163.170.17!newstf01.news.aol.com!audrey01.news.aol.com!not-for-mail
From: [e-mail] (AmranDin)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 2-Meter Vertical Antenna Plans - HELP!
Date: 31 Dec 1996 06:57:48 GMT
Organization: AOL http://www.aol.com
Lines: 6
Message-ID: <[e-mail]>
References: <01bbf691$de9ad340$c9f13cc7@alc-pc01>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

I recommend a MFJ-1750, a 2 meter 5/8 ground plane antenna. At $19.95 it's
a great buy and probably cheaper than if you made your own. With an SWR of
under 1.4 across the band, I've had some great results with mind. Overall,
a  great price for a great antenna.

73, Amran (KF6HAD).


From [e-mail] Thu Jan 02 17:22:17 1997
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From: Mike <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Discone antenna's.
Date: Mon, 30 Dec 1996 23:25:51 -0800
Organization: FNS
Lines: 23
Message-ID: <[e-mail]>
References: <[e-mail]>
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To: [e-mail]

Hello david,
I am using that same antenna as a quick and easy multi band tx / rx
antenna. Works fairly well an every band you are asking about. Go ahead
and put it up.




David A. Cooley wrote:
>
> Hello all,
> Are Discone antenna's any good?  I was just given one by my dad.  It's a
> radio shack model, says it is good for 25-1300 MHZ.  Also says it will
> have swr below 1.5:1 on 144, 220, 440, 900 and 1296 MHZ.
>
> Tnx,
> Dave
>
> --
> ========================================================================> Da
vid Cooley N5XMT                  Packet: N5XMT@W4RAL.#RTP.NC.USA.NOAM
> Internet: [e-mail]    And Web: http://www.ipass.net/~cooldave/
> Sponges grow in the ocean... Wonder how deep it would be if they didn't!
> ========================================================================


From [e-mail] Thu Jan 02 17:22:18 1997
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From: [e-mail] (Jim Storm)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Discone antenna's.
Date: Tue, 31 Dec 1996 08:00:17 GMT
Organization: Netcom
Lines: 25
Message-ID: <5aah69$[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: smx-ca8-60.ix.netcom.com
X-NETCOM-Date: Tue Dec 31 12:00:09 AM PST 1996
X-Newsreader: Forte Free Agent 1.0.82

I've been using a homebrew discone in the attic for many years, It
works great. I'm also using a Radio Shack discone on the roof.
Unfortunately it's lost some elements in the last three years rather
severe storms. It still works though.

                       73, Jim WB6LWS

"David A. Cooley" <[e-mail]> wrote:

>Hello all,
>Are Discone antenna's any good?  I was just given one by my dad.  It's a
>radio shack model, says it is good for 25-1300 MHZ.  Also says it will
>have swr below 1.5:1 on 144, 220, 440, 900 and 1296 MHZ.

>Tnx,
>Dave

>--
>========================================================================
>David Cooley N5XMT                  Packet: N5XMT@W4RAL.#RTP.NC.USA.NOAM
>Internet: [e-mail]    And Web: http://www.ipass.net/~cooldave/
>Sponges grow in the ocean... Wonder how deep it would be if they didn't!
>========================================================================




From [e-mail] Thu Jan 02 17:22:19 1997
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From: J&J Mac <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Discone antenna's.
Date: Tue, 31 Dec 1996 00:17:58 -0800
Organization: West Coast Online's News Server - Not responsible for content
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Message-ID: <[e-mail]>
References: <[e-mail]>
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To: [e-mail]

David A. Cooley wrote:
>
> Hello all,
> Are Discone antenna's any good?  I was just given one by my dad.  It's a
> radio shack model, says it is good for 25-1300 MHZ.  Also says it will
> have swr below 1.5:1 on 144, 220, 440, 900 and 1296 MHZ.
>
> Tnx,
> Dave
>

I have one and use it for both UHF and VHF. not a single problem.
Maybe not a lot of gain but good for what they are.

Jim..
kb6zop


From [e-mail] Thu Jan 02 17:22:20 1997
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From: BOB DUCKWORTH <[e-mail]>
Newsgroups: rec.radio.swap,rec.radio.amateur.antenna
Subject: WTB GEM QUAD, pay $200.00
Date: Tue, 31 Dec 1996 08:18:05 +0000
Organization: Atlanta Technology Library and Museum
Lines: 8
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Reply-To: [e-mail]
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Xref: news1.epix.net rec.radio.swap:102039 rec.radio.amateur.antenna:33436

Do you have a GEM Quad that you never put together?
If so and you're ready to sell it, please let me know.
I'm ready to pay $200 for an unused GEM Quad.
Triband 20, 15, 10m version.

73
-bob
WB4MNF


From [e-mail] Thu Jan 02 17:22:21 1997
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From: [e-mail] (Morel Grunberg)
Newsgroups: rec.radio.amateur.antenna
Subject: Phyllistran source ?
Date: 31 Dec 96 09:43:27 GMT
Organization: ucsd usenet gateway
Lines: 8
Message-ID: <c=US%a=_%p=TELRAD%l=[e-mail]>
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]

Hello,

I'm looking for Phyllistran sources and accesories in U.S. ( other
than Texas Towers ).

Happy New Year

Morel, 4X1AD


From [e-mail] Thu Jan 02 17:22:21 1997
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From: "Donald M. Ross" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 2-Meter Vertical Antenna Plans - HELP!
Date: 31 Dec 1996 11:41:35 GMT
Organization: Sirius Systems Group, Inc.
Lines: 15
Message-ID: <01bbf70f$8234f760$095003cf@nl7co-computer>
References: <01bbf691$de9ad340$c9f13cc7@alc-pc01> <[e-mail]>
NNTP-Posting-Host: ppp9.sirinet.net
X-Newsreader: Microsoft Internet News 4.70.1155

But KC5UZY lost his to a wind storm that didn't damage my Ringo Ranger II.


AmranDin <[e-mail]> wrote in article
<[e-mail]>...
> I recommend a MFJ-1750, a 2 meter 5/8 ground plane antenna. At $19.95
it's
> a great buy and probably cheaper than if you made your own. With an SWR
of
> under 1.4 across the band, I've had some great results with mind.
Overall,
> a  great price for a great antenna.
>
> 73, Amran (KF6HAD).
>


From [e-mail] Thu Jan 02 17:22:22 1997
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From: [e-mail] (Don Stoner)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Sommer Antennas
Date: 31 Dec 1996 12:21:41 GMT
Organization: AT&T WorldNet Services
Lines: 20
Message-ID: <5ab0gl$[e-mail]>
References: <01bbf534$35151820$99ad3ace@larry>
NNTP-Posting-Host: 207.147.128.25
X-Newsreader: WinVN 0.99.6

In article <01bbf534$35151820$99ad3ace@larry>, [e-mail] says...
>
>Ordered the small antenna a month ago and keep getting the runaround
from
>Sommer.
>A seemingly endless profusion of excuses and confusion on their end.
>
>Anybody else had the same problem?
>
>Getting really hard to spend money in the ham community.
>
Ron, Alf Sommer and his wife "Charlie" (Charlene) run a one man
operation over at Geneva.I can tell you he is absolutely honest if
somewhat disorganized. He also supplies antennas for commercial appps.
and to embassies all over the world. When he gets a big order, it is
total chaos. Also, he handmakes almost everything. But if you want to
own the finest beam made and one that will stay up for years without
problems, simply hang in there. I know, I bought one and it is now
residing 250 feet above sea level in Clearwater, Florida. 73 Don, W6TNS



From [e-mail] Thu Jan 02 17:22:23 1997
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From: [e-mail] (W6KKT Jesse)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: G5RV FACTS
Date: Tue, 31 Dec 1996 12:55:49 GMT
Organization: Microserve Information Systems (800)-380-INET
Lines: 14
Distribution: world
Message-ID: <[e-mail]>
References: <5a1iok$[e-mail]> <5a4lon$[e-mail]> <[e-mail]> <[e-mail]>
NNTP-Posting-Host: dyn16.frazmtn.com
X-Newsreader: Forte Agent .99e/16.227

On Tue, 31 DEC 96 00:19:24 -0500, [e-mail] wrote:

>Grant Youngman <[e-mail]> writes:
>
>>> With very little feedline loss (less than .1 dB) I measure the following
>>> SWR on a G5RV 50 feet high:
>
>Kindly inform what feedline has .1 db loss in 50 feet. Thanks.

Hi Grant, 450 ohm ladder line has .1db or less up to 16mhz per 100
feet and open wire construction takes it up to around 30mhz (assuming
lines are terminated into their characteristic impedance). As opposed
to RG213 which is .6db/100ft at 4mhz.
73, Jesse, W6KKT


From [e-mail] Thu Jan 02 17:22:24 1997
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From: "William M. Bickley" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: 40M Beam Recommendations?
Date: Tue, 31 Dec 1996 08:27:52 -0500
Organization: Netcom
Lines: 8
Message-ID: <[e-mail]>
NNTP-Posting-Host: prn-nj1-08.ix.netcom.com
Mime-Version: 1.0
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X-NETCOM-Date: Tue Dec 31  5:29:07 AM PST 1996
X-Mailer: Mozilla 3.01 (Win95; U)

Our radio club is contemplating replacing an old 3-element KLM 40M beam
which is literally falling apart.  Any suggestions and recommendations
would be appreciated.  I'd like to start with the very best, and back
down from there if reality dictates.

Tnx, es 73.

Bill  KF2ON


From [e-mail] Thu Jan 02 17:22:25 1997
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From: Jake Brodsky <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Telecommunications Act of 1996
Date: Tue, 31 Dec 1996 08:37:44 -0500
Organization: Utter Chaos
Lines: 26
Message-ID: <[e-mail]>
References: <01bbf47b$ab267680$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: spg-as3s13.erols.com
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J Mullins wrote:

> The above statement is the leading sentence of a memo sent to the Board of
> Directors of my community's Home Owners Association.
> I will try to convey the main points.
>
> "Under the new rule, any association Covenant, rule, or similar restriction
> which "impairs" the installation, maitenence or use of certain antenas is
> UNENFORCEABLE."

Two things come to mind:

1) Let's disguise our roof-top antennas a 1 meter dishes  (HF loops
anyone?)

2) Though something like this is long overdue, I wonder how
many lawsuits the HOA neighborhood nazis are going to launch
at the "Constitutionality" of this regulation.  Anyone care
to speculate how long this is going to last?

73 and Happy New Year!

Jake Brodsky, mailto:[e-mail]
PP-ASEL IA, Cessna Cardinal N30946, Based @ MD24
Amateur Radio Station AB3A
"MY kindness isn't random, nor my acts of beauty senseless."


From [e-mail] Thu Jan 02 17:22:26 1997
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From: BRETSKI <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Gordon West email address
Date: Tue, 31 Dec 1996 08:38:54 -0500
Organization: Purdue University
Lines: 9
Message-ID: <[e-mail]>
NNTP-Posting-Host: storm.atms.purdue.edu
Mime-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII


Does Gordon West have an email address?
TIA

BRET A. PENNINGTON / COMPUTER TECH /EARTH & ATMOSPHERIC SCIENCES
317-494-0678 / PURDUE UNIVERSITY  / WEST LAFAYETTE, INDIANA 47907
[e-mail]         /     speaking only for myself.
/\/\/\/\/\/\ --... /\/\/\/\/ N9ZFF \/\/\/\/\/\/\ ...-- /\/\/\/\/\



From [e-mail] Thu Jan 02 17:22:27 1997
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From: Jake Brodsky <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Q:Maxwell's Quarternian Equations
Date: Tue, 31 Dec 1996 09:15:53 -0500
Organization: Utter Chaos
Lines: 26
Message-ID: <[e-mail]>
References: <5a7nvl$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: spg-as3s13.erols.com
Mime-Version: 1.0
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Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.0 (Win95; I)
To: Thomas Mahanna <[e-mail]>

Thomas Mahanna wrote:

>         On a radio talk show, I heard a gent mention that J.C. Maxwell's
> original works included more than 200 equations, other than the 4 basic
> equations taught to EEs. These were said to expressed using Quarternians
> which I understand to be differential equations. Is there any truth to
> this, or is it a mere speculation?

I was taught in my class of Electricity and Magnetism at The Johns
Hopkins University that Quarternians were an older mathematical
technique, no longer commonly used today.  (BTW:  The del notatation
used these days is relatively new thing) Quarternians were used for
computational reasons, not simplicity.

I don't know whether it really took 200 equations to describe
Maxwell's Laws, but if you start with the four basic equations
and compute each dimension of each partial differential equation
seperately, it isn't difficult to see how things can get out of
hand very quickly.

73,

Jake Brodsky, mailto:[e-mail]
PP-ASEL IA, Cessna Cardinal N30946, Based @ MD24
Amateur Radio Station AB3A
"MY kindness isn't random, nor my acts of beauty senseless."


From [e-mail] Thu Jan 02 17:22:28 1997
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From: William J Heinzinger <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: WTB: Force 12 C3 or C4
Date: Tue, 31 Dec 1996 14:47:45 GMT
Organization: Netcom
Lines: 7
Message-ID: <5ab9it$[e-mail]>
NNTP-Posting-Host: als-il4-02.ix.netcom.com
X-NETCOM-Date: Tue Dec 31  8:56:29 AM CST 1996
X-Newsreader: NETCOMplete/3.0

I'm looking to buy a Force 12 C2 or C4 antenna.
Please reply via [e-mail] or by
PacketCluster: Homenode KS9U
or by phone: [phone]

Thank you
Bill


From [e-mail] Thu Jan 02 17:22:32 1997
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From: David Cooley <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: HTX202 & 404Antennas
Date: Tue, 31 Dec 1996 10:08:04 -0500
Organization: IPass.net
Lines: 30
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: customs216.ipass.net
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BCSpain wrote:
>
> [e-mail] wrote:
> > Are the antennas for the HTX 202 and 404 the exact same part?  Was told
> > the antennas for these two radios were interchangeable. Doesn't make
> > sense?
>
> Absolutely NOT!  You *might* get away with using the 2m antenna on the 440
> rig (not recommended) but you'll blow the finals in your 202 with the 440
> antenna in short order. Inspite of what some of the folks are saying, the
> antenna must match the transmitter. I agree that a rubber duck is not the
> best antenna in the world, but it MUST be used on the band its designed
> for or the finals will give out. (Its just like trying to use a CB antenna
> on 80 meters.)

Bryan,
I agree an antenna should be matched to a transmitter, but the R.S. web
page lists the same part number for the 202 and 404 antenna's...  Also
remember, 440 is 3 times 144 (roughly) so a 1/4 wave 2m will work over a
part of the 440 band with proper SWR.

Later,
Dave


--
=================================================================
David Cooley           A.K.A. N5XMT            [e-mail]
http://www.ipass.net/~cooldave/
=================================================================


From [e-mail] Thu Jan 02 17:22:33 1997
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From: David Cooley <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: HTX202 & 404Antennas
Date: Tue, 31 Dec 1996 10:11:08 -0500
Organization: IPass.net
Lines: 30
Message-ID: <[e-mail]>
References: <[e-mail]> <5a12u0$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: customs216.ipass.net
Mime-Version: 1.0
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To: [e-mail]

Thomas P. Branch wrote:
>
> [e-mail] wrote:
>
> >Are the antennas for the HTX 202 and 404 the exact same part?  Was told
> >the antennas for these two radios were interchangeable. Doesn't make
> >sense?
>
> Does not seem like they should unless RS is using a dual band
> antenna--which does not seem likely.  I purchased a Larson duck for my
> HTX-202 and have been very happy with it.  While my is 2 meter only,
> Larson sells a dual-band duck as well.
>
> 73 de Tom, K4NR

Hi Tom,
When RS released the 404, they used the same ant. they had been using on
the 202 with it.  Their tech support web page shows a breakdown and
parts list for all their equipment, and the 202 and 404 use the same
ant.

Later,
Dave


--
=================================================================
David Cooley           A.K.A. N5XMT            [e-mail]
http://www.ipass.net/~cooldave/
=================================================================


From [e-mail] Thu Jan 02 17:22:35 1997
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From: Don Labriola <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: VHF Antenna Question
Date: Tue, 31 Dec 1996 07:55:06 -0800
Organization: Netcom
Lines: 32
Message-ID: <[e-mail]>
References: <5a2b7j$[e-mail]> <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: ont-ca8-15.ix.netcom.com
Mime-Version: 1.0
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X-NETCOM-Date: Tue Dec 31  7:59:37 AM PST 1996
X-Mailer: Mozilla 3.01Gold (Win16; U)

kate wrote:
>
> > ->I have a small portable aircraft band radio. This is not a
> > ->scanner radio or any similar device, just a simple device
> > ->which resembles what became known through the 1980s as a
> > ->"transistor radio".
> >
> > Build one of those antennas, whether or not 50, 70, or 300 ohm (it will
> > make precious little difference to the operation).  Collapse the whip
>
> Hold on....
> won't 300 ohm be prone to interference, or behave as part of the antenna
> if i run a length of it from the roof down into my house??
>
> I just thought that the purpose of 75 ohm coax was to transport signals
> from antenna to tuner without affecting the nature of the signal, maybe i
> am completely wrong.
>
> Do you have any idea which antenna would work best for this 25Km
> distance? and how high I would have to mount it (bearing in mind i simply
> CAN'T get above the pine trees :) )
> KM

If you have a good TV/FM antenna, you might try pointing it towards the
airport and connecting the downleads as indicated earlier in the post.
Not ideal, but it should be a quick experiment. The aircraft band is
just above the commerical FM band, so the gain should be OK. I'm not
sure what the input matching network on your radio looks like - again a
quick experiment with 75 vs 300 ohm via a matching transformer may yeild
faster results than trying to locate the schematic!

73's de W6QS - Don Labriola


From [e-mail] Thu Jan 02 17:22:37 1997
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From: jvaldes <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: 6M & HF
Date: Tue, 31 Dec 1996 11:13:44 -0500
Organization: whoi
Lines: 29
Message-ID: <[e-mail]>
NNTP-Posting-Host: floatmgr.whoi.edu
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.01 (Win16; I)

I would like to mount a 4 element 6 meter beam on my HF tribander boom
to minimize wind loading. Has anyone tried this? I was also considering
running a single feedline as opposed to seperate feeds.
I mounted the 6 meter elements last weekend, the effects were minimal on
HF and I was able to obtain resonance on 6, actually a little out of the
band at 49 Mhz. When I mounted the driven element for 6 I placed it an
electrical halfwave at 50 Mhz. from the HF driven element. After
checking the HF and 6 meter response individually I coupled the two
driven elements through a halfwave length of coax. I found the HF
response to be OK but the 6 meter response wasn't too good, with two
resonances at 48 and 51 MHz., the 51 was the better of the two. Looking
fiurther, I swept the HF element alone and found there to be a resonance
at 51 Mhz which was the result of the 6M director (it's physical length)
placed about 6 inches from the HF driven element. Sooo... it's back to
the drawing board.
I was looking in the RSGB VHF manual and found a reference to a two
meter endfire array (HB9IB ??), I am considering scaling this to 6
meters, it utilizes two driven elements phased properly to provide a
unidirectional pattern. I would like to couple this to the HF driven
element (single feed line,with no direct connection to the 6M driven
elements (2)) and add a director and a reflector to complete the beam.
The dual driven elements on 6 would be phased through open wire line,
with either dipole elements or a delta match to provide a balanced
system.

Does anyone have any other suggestions or ... which modeling software
would be suitable for this application.

Thanks for your help, Jim, WA1GPO


From [e-mail] Thu Jan 02 17:22:38 1997
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From: Mike Watson <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Telecommunications Act of 1996
Date: Tue, 31 Dec 1996 10:13:53 -0600
Organization: WB0IKT
Lines: 47
Message-ID: <[e-mail]>
References: <01bbf47b$ab267680$[e-mail]> <[e-mail]>
NNTP-Posting-Host: ip145.sky.net
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.01 (Win16; I)

Jake Brodsky wrote:
>
> J Mullins wrote:
>
> > The above statement is the leading sentence of a memo sent to the Board of
> > Directors of my community's Home Owners Association.
> > I will try to convey the main points.
> >
> > "Under the new rule, any association Covenant, rule, or similar restrictio
n
> > which "impairs" the installation, maitenence or use of certain antenas is
> > UNENFORCEABLE."
>
> Two things come to mind:
>
> 1) Let's disguise our roof-top antennas a 1 meter dishes  (HF loops
> anyone?)
>
> 2) Though something like this is long overdue, I wonder how
> many lawsuits the HOA neighborhood nazis are going to launch
> at the "Constitutionality" of this regulation.  Anyone care
> to speculate how long this is going to last?
> \

I'm interested too.  I just moved into a new sub-division that has some
deed restrictions "no externale transmitting or receiving antennas". The
developer thought that since he was installing cable, there was no need
for antennas.  I'd heard from several sources that these restrictions
could not apply to Amateur Service because FCC and fFederal statutes
took precidence.  His response was, "if your neighbors don't mind, I
don't!"

> 73 and Happy New Year!
>
> Jake Brodsky, mailto:[e-mail]
> PP-ASEL IA, Cessna Cardinal N30946, Based @ MD24
> Amateur Radio Station AB3A
> "MY kindness isn't random, nor my acts of beauty senseless."

--
=====================================================================
Mike Watson, WB0IKT
Raymore, Missouri, USA
http://www.sky.net/~crucis

 "Meetings are like fungi---there are more growing in dark, damp
  corners."
=====================================================================


From [e-mail] Thu Jan 02 17:22:40 1997
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From: Don Labriola <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,sci.electronics.misc
Subject: Re: EM hell?
Date: Tue, 31 Dec 1996 08:17:09 -0800
Organization: Netcom
Lines: 33
Message-ID: <[e-mail]>
References: <32c3b801.4651861@165.87.194.249>
Reply-To: [e-mail]
NNTP-Posting-Host: ont-ca8-15.ix.netcom.com
Mime-Version: 1.0
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To: [e-mail]
Xref: news1.epix.net rec.radio.amateur.antenna:33453 sci.electronics.misc:19360

Luiz Marcondes wrote:
>
> Hi,
>
> About a mile from my home there are four TV (channels 2, 4, 9 and 14) and
> several broadcast FM transmitters, all working with powers in the 100+ Kw
> ERP class.
> Radio reception is a nightmare, mostly (I think) because of IM products
> in overloaded front end stages. In most bands there are several regions
> at a spacing of about 100Khz, each 30-40 Khz wide with a harsh buzz
> stronger than anything else.
> Maybe a bandpass filter could alleviate the problem, but I don't know how
> much out-of-band attenuation I'll need, any ideas?
> 73
>
> Luiz


The 100kHz spacing up and down the band sounds more like a switched mode
power
powersupply somewhere in the area. I had to track one of these down at
my workplace
(bothering a club station). These are in use all over, so you should
first check if
it is any of YOUR equipment (try powering off EVERYTHING except the
radio (i.e. pull
all of the other circuit breakers). You may luckout. Bring them on one
at a time until
you locate the source. Once you find it, try ferrites, etc. to keep it
from getting into
the power lines. Good Luck.

73's de W6QS - Don Labriola


From [e-mail] Thu Jan 02 17:22:41 1997
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From: [e-mail] (Dick Flanagan)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Lightning Protection Equip?
Date: Tue, 31 Dec 1996 09:58:34 -0800
Organization: Libelle Productions, Inc., Minden, Nevada USA
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>Kevin Shea wrote:
>
>>P.S.  I've read that MOVs wear out, but when?  I know you can really tell
>>but should I be tossing out old surge protectors? How old?
>
>Please can we have any genuine, quotable literature references to this
>phenomenon - as opposed to technical folklore?

See http://www.polyphaser.com/ for lightning protection info.
--
Dick Flanagan W6OLD CFII Minden, Nevada
Visit http://wadg.greatbasin.net/siera/


From [e-mail] Thu Jan 02 17:22:42 1997
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From: [e-mail] (owl)
Newsgroups: rec.radio.amateur.antenna
Subject: cde rotor controller info needed.
Date: Tue, 31 Dec 1996 18:00:10 GMT
Organization: Internet Services Provider Network
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I am looking for information on a coil doubler electronics rotor pr44
with a series 3-816 or 3-130. have both. if anybody has any info
please e-mail me.
[e-mail]
[e-mail]

thank you in advance.
tom
KB0DSV.



From [e-mail] Thu Jan 02 17:22:43 1997
Newsgroups: rec.radio.amateur.antenna
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From: [e-mail] (James Aeschliman)
Subject: Re: Where to put the Antenna
Message-ID: <[e-mail]>
Sender: [e-mail]
Reply-To: [e-mail] (James Aeschliman)
Organization: Seattle Community Network
References: <5a73mq$[e-mail]>
Date: Tue, 31 Dec 1996 18:24:37 GMT
Lines: 24


In a previous article, [e-mail] (Michael Lewis) says:

>I am looking for some advice regarding the best place to put a random
>wire.  I am in a house that has power/phone lines running paralel.
>behind it.  The phone and electric feed lines run from there to the
>house.  So in effect I have power lines running n/s e/w.    If I run
>the antenna n/s it paralels the incoming power.  If e/w it paralels
>the power pole lines.
>
>Rather than putting the antenna outside, my first idea was to put it
>in the attic, but the 1 story house has a rock roof.  How much
>decrease in signal will I experience from the rock roof.  ANY other
>suggestions are welcome!   Thanks!
>
Before putting the antenna in the attic, I would try outside.  Just don't
run it over or under any power lines.  You can throw up something quick
to see if there will be any problems (I assume your concerned about power
line noise), and if it works okay, spend the time to put up something
more permanent.  I doubt if an attic antenna would work any better than
one outside.
--
Jim Aeschliman                      [e-mail]
Black Diamond, Washington           KD7MK


From [e-mail] Thu Jan 02 17:22:43 1997
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From: Phil <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.cb
Subject: Re: Q: Is a dipole any good for 11m?
Date: 31 Dec 1996 18:59:52 GMT
Organization: Xyplex, Inc.
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Did I miss something?

Who said a dipole couldn't be vertically polarized?

Dipoles work great and are dirt cheap to make.

-> Phil



From [e-mail] Thu Jan 02 17:22:44 1997
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From: [e-mail] (Edward Lewis)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: HTX202 & 404Antennas
Date: Tue, 31 Dec 1996 19:00:51 GMT
Organization: West Coast Online's News Server - Not responsible for content
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[e-mail] wrote:

>[e-mail] (BCSpain) wrote:
>
>>[e-mail] wrote:
>>> Are the antennas for the HTX 202 and 404 the exact same part?  Was told
>>> the antennas for these two radios were interchangeable. Doesn't make
>>> sense?
>>
>>Absolutely NOT!  You *might* get away with using the 2m antenna on the 440
>>rig (not recommended) but you'll blow the finals in your 202 with the 440
>>antenna in short order. Inspite of what some of the folks are saying, the
>>antenna must match the transmitter. I agree that a rubber duck is not the
>>best antenna in the world, but it MUST be used on the band its designed
>>for or the finals will give out. (Its just like trying to use a CB antenna
>>on 80 meters.)
>>
>>73's
>>Bryan  WB5YIW
>
>I think you will find, Bryan, that if you check further you will find
>out that they are exactly the same part.
>
>--
>73,
>Butch N2YMJ

I have the 202 and 404 antennas laying on my desk. No way are they the
same part. The 202 antenna is thicker and longer


From [e-mail] Thu Jan 02 17:22:48 1997
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From: Phil <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.cb
Subject: Re: Q: Is a dipole any good for 11m?(Thankyou)
Date: 31 Dec 1996 19:05:51 GMT
Organization: Xyplex, Inc.
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Xref: news1.epix.net rec.radio.amateur.antenna:33449 rec.radio.cb:40308

Don't discount the vertically polarized dipole for local work either.

They have a very low angle of radiation when installed at elevation say
20-30 feet up and an excellent Omni-directional pattern. I have used mine
for CB base station work for years without trouble and receive excellent
signal reports from 0-25 miles out.

Give the dipole a shot and save a bundle of money.

-> Phil KKC4849 (Calamity), KA1NHZ, AFA1MY, Patriot 655



From [e-mail] Thu Jan 02 17:22:49 1997
Newsgroups: rec.radio.amateur.antenna
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From: Steve Ellington <[e-mail]>
Subject: Re: G5RV FACTS
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For what it's worth. I had a qso with a G5RV expert last night who
swears that the best way to tune the G5RV is to adjust the stub for the
lowest swr on 40 meters. He claims the rest of the bands will then have
the lowest possible swr.

N4LQ


From [e-mail] Thu Jan 02 17:22:51 1997
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From: [e-mail] (Doug Rickard)
Newsgroups: rec.radio.amateur.antenna
Subject: Feeders for log periodics, etc. ?
Date: 31 Dec 96 19:25:15 GMT
Organization: ucsd usenet gateway
Lines: 40
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NNTP-Posting-Host: mail.ucsd.edu
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I would like to have a direct e-mail discussion with anyone
who is familiar with the design of VHF-UHF log periodic
antennae.

I have two problems that I would like to discuss -

1. What should be the impedance of the feedline joining all
the elements together? I have done measurements on various
commercial LPDA feeds of the conductor diameter to spacing,
and find that the feeder impedance seems to be anywhere
between 300 and 700 ohms. I would have though that as the
impedance of a simple dipole is 72 ohms, and generally there
would be several in parallel working at any particular
frequency, that the feeder impedance would have had to be
lower than 72 ohms, not higher.... What have I forgotten? I do
have a number of different programs for the design of LPDA but
none of them go into any discussion of the feeder system.

2. I am interested in building a log-yagi for our TV channel 2
(63-70 MHz). I have seen various designs for 6 mt log-yagi,
and thought I could just scale one of those designs, but
cannot lay my hands on any articles at this moment. We are in
a very difficult location with a 700 ft hill directly in front
of us, with a solid wall of multi-story buildings about 20 km
behind us. The TV Tx is about 70 km away. I actually get a
stronger signal from the reflections from the buildings behind
us at Surfers Paradise, but the ghosting is horrendous. So I
need an ant with very good front to back ratio, as well as
some gain. My previous experience with LPDA has been that they
have excellent F/B ratios, so a log-yagi may be the answer.

Yes, I know, "ask here, get the answer here", but I don't want
to clog up the list with my ramblings, unlike some who seem to
like to see their name in print again and again and again.....

Doug Rickard VK4DWR

[e-mail]



From [e-mail] Thu Jan 02 17:22:52 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: G5RV FACTS
Date: 31 Dec 1996 19:55:41 GMT
Organization: AOL http://www.aol.com
Lines: 20
Message-ID: <[e-mail]>
References: <[e-mail]>
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X-Newsreader: AOL Offline Reader

In article <[e-mail]>, [e-mail] writes:

>>> With very little feedline loss (less than .1 dB) I measure the
following
>>> SWR on a G5RV 50 feet high:
>
>Kindly inform what feedline has .1 db loss in 50 feet. Thanks.

The open wire line is for the first 32 feet or so, the remaining 10 feet
was some low loss light weight (the main reason I used it) 50 ohm
spiralflex cable (it has a VP of around .92).

I have a balun on a short pole I disconnected to connect the antenna
analyzer to the feedline.

By the way, Eznec seems to agree closely with the reading. The computer I
used was a 386DX with a math co-processor. That is probably just as
important as the feedline I used, hi.

73 Tom


From [e-mail] Thu Jan 02 17:22:53 1997
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From: [e-mail] (Maurice Andries)
Newsgroups: rec.radio.amateur.antenna
Subject: Outbacker Perth
Date: Tue, 31 Dec 1996 20:11:41 GMT
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Hi everybody,

This summer I bought an outbacker Perth in the US. The antenna was used over a
3 week period on a rental car on 20 meter with great succes (only 50 w from a
TS-50S gave me ZK1 after 2 tries in the pile-up). I didn't have an SWR meter
the first week so I used the mark on the antenna as reference.
When I got home I once again used the antenna on 20 meter (checked SWR this
time!). Once again great succes.

Last week I used the antenna again an began checking SWR on ALL bands. 30-10
meter were great. No tuning required on 30, 17,15,12 meter. Perfect SWR when I
used the mark on the top whip. On 10 meter I had to shorten the whip about 5
inches and on 20 I had to make the whip longer.  Once again SWR perfect on
those bands.

On 40 meter  however I  had to extract the top whip to its maximum and the the
SWR was about 2.5:1 on 7.100 (and higher won lower freq). I  need to make the
whip even longer to get SWR 1:1 on 7.065 (middle of SSB portion).
The same problem happened on 80 meter. SWR could not be lowered to acceptable
levels INSIDE the 3.5-3.8 Mhz segment. Resonating frequency was once again
slightly ABOVE the ham band.

Anybody has any idea what can be done to change the SWR to acceptable levels
on 40 and 80 without affecting the other bands. My first guess i to get a
longer whip just for the lower bands. Maybe someone did experiments with a
longer fly lead so an extra turn can be made ??

Any suggestions are welcome since I want to use the antenna on 40 and 80
meter when I make trips within a 350 Km radius from home.


Thanks a lot.
Happy New year.


Reply via e-mail please (newsgroup postings don't always get here)


Just my 2 cents, Your mileage may vary
Opinions are my own (most of the time).

73 de Maurice, [e-mail] (internet)
                 [e-mail]
               ON4BAM@ON6AR.#AN.BEL.EU
               http://user.glo.be/~mauricea (Ham links and station info)

Important: Anyone sending me junkmail will be billed
           at US$ 10.00 per mail.


From [e-mail] Thu Jan 02 17:22:54 1997
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From: [e-mail] (Brian P. Burke)
Newsgroups: rec.radio.amateur.antenna
Subject: HTX 202 and 404 Antennas
Date: 31 Dec 96 20:33:55 GMT
Organization: ucsd usenet gateway
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References: <[e-mail]>
NNTP-Posting-Host: mail.ucsd.edu
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Butch/N2YMJ,  the only thing "interchangeable" about the HTX 202 and HTX
404 antennas are they both use the BNC connector.  If RS has them both
stock listed with the same number, it is a MISTAKE.  I've got lots of
antennas with SO-239 connectors on them, but they're not interchangeable
either.   You can do what you want, and I'm not going to say another word
on this.  Good luck, Brian/N0iMD


From [e-mail] Thu Jan 02 17:22:55 1997
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From: "David B. Holtkamp (K5KH)" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Force 12 C4 review & comments (long)
Date: 31 Dec 1996 20:41:36 GMT
Organization: The Santa Fe Institute
Lines: 21
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>
> Why not stick a large value resistor, say 100K ohm or so from the element
> to the boom.  I don't know for sure, but if the idea is to dissapate
> static, wouldn't this work?

  Interesting possibility...I suppose it would work reasonably well.
Alternatively, put the 100k from hot to ground in your feed line coax.
Wouldn't that work as well?


> The other solution is to use a quad.  <G>

  Not really any option because of space/height constraints, as you might
guess.

  Thanks for the comments!

  73s de David (K5KH)


From [e-mail] Thu Jan 02 17:22:58 1997
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From: "David B. Holtkamp (K5KH)" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Antenna for High Noise area?
Date: 31 Dec 1996 20:47:03 GMT
Organization: The Santa Fe Institute
Lines: 20
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Hi Ted! Good to see you here!

> Does anyone have a suggestion for the best antenna for
> this bad situation? I would suspect that a low Impedance
> narrow band antenna would be best, something like some sort of
> loop. Am I on the right track???

  I've never faced this sort of situation, but I'd expect a low impedance,
resonant antenna to be about as good as you can do.

  More expensive solutions include:

  Remoting the antenna and using a cross link (either landline or VHF)

  Moving...but then I think your area is a very nice one!

  Wish I could help more...

  73s de David (K5KH -- ex: WA5SVJ)


From [e-mail] Thu Jan 02 17:22:59 1997
Newsgroups: rec.radio.swap,rec.radio.amateur.antenna
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From: [e-mail] (Pete Soper)
Subject: sloping dipole question
Organization: Encore Computer Corporation
Date: Tue, 31 Dec 1996 21:16:33 GMT
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Hello,
        I'm preparing to put up two more sloping 1/2 lambda dipoles and
have a question about real world gain. If I have a 40 meter dipole
sloping at a 45 degree angle with its top end at 90 feet, EZNEC predicts
a sharp but narrow null "behind" the antenna, maximum gain broadside
to the elements and the gain to the "front" down a few db. Front
is defined as the direction toward the lowest point, away from the
support. Overall maximum gain is pretty low compared to a flat top
but low angle gain is impressive (relatively speaking <g>).
        Does this agree with the real results you get with this
antenna type? My other slopers are too low to be much more than omni
cloud warmers but at 90 feet I'd like to get the initial "aim" close
to correct as the logistics are a challenge.
        There is no tower behind the slopers, just pine tree.
        If I could manage to pull this 40m dipole up flat at something
close to 90 feet should I expect DX performance to go up or down? I know
what EZNEC predicts, but vertical polarization seems to be full of
pleasant surprises.

Regards,
Pete
KS4XG


From [e-mail] Thu Jan 02 17:23:00 1997
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From: Bob Hutson <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.cb
Subject: Re: Q: Is a dipole any good for 11m?(Thankyou)
Date: Tue, 31 Dec 1996 17:14:28 -0500
Organization: WorldCHAT(tm) Internet Services
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[e-mail] wrote:
>
> Mr Hogan <[e-mail]> wrote:
>
> >J&J Mac wrote:
> >>
> >> > >Is a dipole any good for 11m antenna?
> >> > >
> >> >
> >>
> >> What do you think the Antron 99 is?
> >
> >I haven't the slightest idea. Did you have more to add.
> >
> >,\\ichael
> >
> >As the original poster I learned:
> >
> >A dipole isn't really for local use on 11m(CB) but great for pulling
> >in DX. A dipole can be a dream if setup correctly on 10m.(& others)
> >
> >Thankyou everyone who replied.
> >
> >Peace
> >
> >,\\ichael
>
> A dipole cut for the 11 meter band, and hung VERTICALLY will perform
> quite well. The coax cable must run horizontally for at least 1/4
> wavelength, however. The antenna should also be at least 1/4
> wavelength above the ground.
>
> --
> 73,
> Butch N2YMJ
Beter off if the antennae is at least a full wavelength off the
ground!! (36 feet)


From [e-mail] Thu Jan 02 17:23:01 1997
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From: [e-mail] (Charles Hellman)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Ham-Ant Digest V96 #932 QUATERNIANS
Date: 31 Dec 96 22:19:43 GMT
Organization: ucsd usenet gateway
Lines: 5
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]

QUATERNIONS WERE AN EARLY METHOD OF REPRESENTING VECTORS, ORIGINATED BY
HAMILTON IN 1843. VECTOR ANALYSIS WAS BUILT BY PHYSICISTS  BASED ON
QUATERNIONS. VECTOR ANALYSIS IS A COMPACT METHOD OF REPRESENTING VECTORS.
CHARLIE, W2RP.



From [e-mail] Thu Jan 02 17:23:03 1997
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From: [e-mail] (J. L.)
Newsgroups: rec.radio.amateur.antenna
Subject: Long Delayed Echo mysteries...
Date: Tue, 31 Dec 96 22:23:42 GMT
Organization: UUNET Internet Africa
Lines: 30
Message-ID: <5ac3pe$[e-mail]>
NNTP-Posting-Host: 196-7-116-226.iafrica.com
X-Newsreader: News Xpress Version 1.0 Beta #3

Long Delayed Echo mysteries...

Hi,
I'm doing some research for a documentary about anomalies. One of the
subjects I'm interested in is that of LDE's. I have done some reading on
the subject and noted a few experiments - however, I'm looking for new
information & experiences which may help to throw more light on the matter.

Of especial interest is the geographic "preferences" of LDEs. I noted for
example that some evidence pointed to LDEs being more prevalent in
the Polar regions.  Do LDE's have any other preferences? Also, I'm
interested in the various characteristics of the LDEs. I noted some
saying that it tends to occur when "opening up" a frequency.

If you have had any experiences, or know of further literature or people
I can consult - I would very much appreciate it.

I have posted this in several newsgroups since I wasn't quite sure
which is the best place to go, so if this is out of place - I apologise.

If you can help in any way, kindly reply by e-mail. Thanks.

Cheers, Jan...
* Ignorant people think it's the noise which fighting cats make
  that is aggravating, but it ain't so; it's the sickening
  grammar they use. (Mark Twain)
* No one's life, liberty or property is safe while
  the legislature is in session. (Mark Twain)
* What do politicians and porn stars have in common? They're both
  experts at changing positions in front of the camera.


From [e-mail] Thu Jan 02 17:23:03 1997
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.misc
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From: "R.W. Odell" <[e-mail]>
Subject: No Hole VHF/UHF antenna for 1997 Jeep Grand Cherokee?
Content-Type: text/plain; charset=us-ascii
Message-ID: <[e-mail]>
Sender: [e-mail]
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Does anyone have any great ideas for this vehicle?  I've mounted a
Kenwood TM941, and am interested in placing an antenna which will at
least give me two of my three favorite bands.

There's the on-glass possibility, or one of these all-way adjustables on
the hatch.

Anyone have any other ideas?

-Bob
WA2WLH/7


From [e-mail] Thu Jan 02 17:23:04 1997
Path: news1.epix.net!news3.epix.net!uunet!in1.uu.net!198.6.9.51!news.thepoint.net!news.iquest.net!PAT
From: [e-mail] (Patrick Croft)
Newsgroups: rec.radio.amateur.antenna
Subject: ESI/ElectroSpace Systems - Time Delays
Date: 31 Dec 1996 22:40:43 GMT
Organization: IQuest Network Services
Lines: 18
Message-ID: <5ac4uq$[e-mail]>
NNTP-Posting-Host: ind-0007-11.iquest.net
X-Newsreader: News Xpress Version 1.0 Beta #4

In the mid to late 70's, K5RR produced verticals and a beam steering control f
or the amateur world.
It was also known as OMEGA, and they were best known then for the Omega noise
bridge.

Mr. Fenwick appearently went on to bigger and better things (ESI now E-Systems
 div of Raytheon).

I'm seeking parts! The verticals used a unique matching coil, and there was al
so a 160 coil option (HP-2).
The steering combiner, (Omega 2000C) has been copied and described in one arti
cle to date.  Little else known.

I've seen nothing advertised on the used market, and really would like to expa
nd my system.
Someone out there must have stashed away some of the pieces, or had a spare th
is or that.
Email me and let me know which items you have, what you think they are worth!

If you just experience, and/or additional knowledge on the time delay idea, I'
d love to hear from you!

Happy New Year!

Patrick
WB9IQI



From [e-mail] Thu Jan 02 17:23:05 1997
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From: [e-mail] (Dick Hughes)
Newsgroups: rec.radio.amateur.antenna,rec.radio.cb
Subject: Re: Q: Is a dipole any good for 11m?
Date: Tue, 31 Dec 1996 22:58:25 GMT
Organization: Oregon Public Networking
Lines: 14
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]> <[e-mail]> <[e-mail]> <5abnr8$[e-mail]>
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On 31 Dec 1996 18:59:52 GMT, Phil <[e-mail]> wrote:

>Did I miss something?
>
>Who said a dipole couldn't be vertically polarized?
>
>Dipoles work great and are dirt cheap to make.
>
>-> Phil
>

No one that I am aware of.

Dick - W6CCD


From [e-mail] Thu Jan 02 17:23:06 1997
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From: [e-mail] (nstn2527)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Battle Creek Special?
Date: 31 Dec 1996 23:19:49 GMT
Organization: NSTN Navigator User
Lines: 19
Message-ID: <5ac72l$[e-mail]>
References: <[e-mail]822> <01bbf6da$df489540$[e-mail]>
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Mime-Version: 1.0
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In article <01bbf6da$df489540$[e-mail]>,
[e-mail] says...
>
>There is a fairly detailed description, with some photographs, in John
>Devoldere's book "Antennas and Techniques for Low Band DXing".  Also the
>book on the 3Y0PI DXpedition gave comparative results between this
antenna
>and a Gap 160m unit (no contest).
>No contest in who's favour?
Les

>John P Smith <[e-mail]> wrote in article
><[e-mail]822>...
>> Anyone have construction details on this antenna?
>>       73
>> John - KI4RO
>> http://www.mnsinc.com/ki4ro
>>



From [e-mail] Thu Jan 02 17:23:08 1997
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From: [e-mail] (Curtis P Sardeson)
Newsgroups: rec.radio.amateur.antenna,rec.radio.cb
Subject: Re: Q: Is a dipole any good for 11m?
Date: Tue, 31 Dec 1996 23:32:34 GMT
Lines: 19
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]> <[e-mail]> <[e-mail]>
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On Sat, 28 Dec 1996 18:17:40 GMT, [e-mail] (Dick Hughes) wrote:

>I think the significance here is that he wants to use a dipole for
>citizen's band operation.  For DX that's fine, but for normal, local
>use a horizontal dipole is going to have a serious signal loss with
>everyone else being vertically polarized.
>
>Dick Hughes - W6CCD

ditto

The value that comes to mind here is about a 20 dB signal loss for
local communications if one antenna is vertical, and the other antenna
horizontal.

-Curt
--
73 DE M/KB9JQU
Nottinghamshire, England


From [e-mail] Thu Jan 02 17:23:10 1997
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From: [e-mail] (Curtis P Sardeson)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Antron -99 on 17 , 15 & 12 meter ????
Date: Tue, 31 Dec 1996 23:32:37 GMT
Lines: 25
Message-ID: <[e-mail]>
References: <01bbf558$2cbf91e0$[e-mail]>
Reply-To: [e-mail]
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On 29 Dec 1996 07:15:19 GMT, "Chuck" <[e-mail]> wrote:

>It is my understanding that the A-99 is a very broadbanded antenna indeed
>but have any of you tried it at 15 & 17 meters??? I have every confidence
>at its ability to tune up for 10 -12 meters. How about 15 - 17???
>

I tried it on 15 meters and I am sure it tuned up fine.  I do remember
however that on 15 meters whenver I TXed I knocked out the TV in the
house.  This has never happened to me with other antennas.

I actually tried to have a QSO with a chap who had a A-99 tuned up on
80 M!  He could tune it up there al right, but I bet he was not
putting out very much.  Anyway we did not make the QSO on 80 or 40 CW
at the time.  He could here me, but I could not here him.

As far as 10 and 12 meters, that is probably the best HAM bands for
the antenna.

Good Luck...

-Curt
--
73 DE M/KB9JQU
Nottinghamshire, England


From [e-mail] Thu Jan 02 17:23:10 1997
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From: [e-mail] (Curtis P Sardeson)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 2-Meter Vertical Antenna Plans - HELP!
Date: Tue, 31 Dec 1996 23:32:39 GMT
Lines: 25
Message-ID: <[e-mail]>
References: <01bbf691$de9ad340$c9f13cc7@alc-pc01>
Reply-To: [e-mail]
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On 30 Dec 1996 20:33:23 GMT, "Randall J. Zaleschuk"
<[e-mail]> wrote:

>Hello from the snowy (cold) Cariboo region of British Columbia!
>
>I want to build a vertical 2-meter antenna for my home station.
[snip]
>
>73s
>Randy - VE7ERZ
>[e-mail]
>ps:  Happy New Year Everyone!

Have you considered a 1/2" copper pipe J-Pole design?  They are very
sturdy when soldered togather and protected with a clear coat or some
other non metalic paint?

There must be plans for the copper pipe J floating all over the Net.
If you need them e-mail me direct and I'll look for you.


-Curt
--
73 DE M/KB9JQU
Nottinghamshire, England


From [e-mail] Thu Jan 02 17:23:11 1997
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From: [e-mail] (Curtis P Sardeson)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Discone antenna's.
Date: Tue, 31 Dec 1996 23:32:41 GMT
Lines: 24
Message-ID: <[e-mail]>
References: <[e-mail]> <5aah69$[e-mail]>
Reply-To: [e-mail]
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On Tue, 31 Dec 1996 08:00:17 GMT, [e-mail] (Jim Storm)
wrote:

>I've been using a homebrew discone in the attic for many years, It
>works great. I'm also using a Radio Shack discone on the roof.
>Unfortunately it's lost some elements in the last three years rather
>severe storms. It still works though.
>
>                       73, Jim WB6LWS

You use to be able to order the elements from RS a few years ago.
They may still stock them since they still stock the antenna.

I lost some elements due to "dropping" the antenna from a 50' roof one
day and had to get replacements.

Oh. and for the orig post, good antenna (only used for RX), know many
HAMS who use them for TX/RX.


-Curt
--
73 DE M/KB9JQU
Nottinghamshire, England


From [e-mail] Thu Jan 02 17:23:13 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!news-xfer.netaxs.com!news.structured.net!news.teleport.com!ip-pdx22-21
From: [e-mail] (Roy Lewallen)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: YET ANOTHER BREAKTHROUGH ON FRACTALS
Date: Tue, 31 Dec 96 23:40:26 GMT
Organization: EZNEC Antenna Software
Lines: 32
Message-ID: <5ac8a9$2vu$[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ip-pdx22-21.teleport.com
X-Newsreader: News Xpress Version 1.0 Beta #3

In article <[e-mail]>,
   [e-mail] (Radiomatt) wrote:
>This seems to be strangely familiar. Wasn't there a similar big
>announcement two or three months ago? Anyone know what this breakthrough
>might be? Or is this another effort to find investors?
>Matt
>FT. LAUDERDALE, Fla.--(BUSINESS WIRE)--Dec. 27, 1996--Fractal  Antenna
>Systems Inc., a leader in innovative antenna design, today  announced it
>is developing a line of miniature, invisible antennas  for wireless and
>cellular applications.

>. . .

>The line of FRACTENNA(TM) fractal antennas addresses the gamut of problems
>that OEM's and consumers have with cellular and wireless  devices.
>Virtually all of these transceivers, which can include cell phones,
>cordless phones, LANS, computer links, trunk radios, RF  tagging, and
>others, incorporate `wand' antennas which protrude from  the casing.  "Its
>an invitation for disaster," says company  spokesman Phil Salkind, "they
>break; have limited reliability; are  too expensive, and let's face it,
>are ugly."  Wands are usually made  of a length of wire or helix.  "That's
>technology which has been  around for at least 50 years," said Salkind.
>"Think of it.  You've got this miracle transceiver and you make it
>wireless by attaching it to a spring.  It's a techno-time warp."

Worse yet, they use RADIO WAVES, a technology which is older yet. And a
MICROPHONE. And BATTERIES! Talk about stone-age!

But I guess that's what it takes to sell consumer goods. What a way to make
a living.

Roy Lewallen, W7EL


From [e-mail] Thu Jan 02 17:23:14 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!news-xfer.netaxs.com!news.structured.net!news.teleport.com!ip-pdx22-21
From: [e-mail] (Roy Lewallen)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: DIRECTIONAL ELF & VLF
Date: Tue, 31 Dec 96 23:45:12 GMT
Organization: EZNEC Antenna Software
Lines: 26
Message-ID: <5ac8j7$2vu$[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ip-pdx22-21.teleport.com
X-Newsreader: News Xpress Version 1.0 Beta #3

In article <[e-mail]>, "J. J. Fino" <[e-mail]> wrote:
>Calling all radio experts:
>
>I am in need of a design for a SMALL antenna (efficiency not important)
>to provide very directional (1 degree or better) receiving direction
>finding; and another design which allows rather directional (prefer less
>than 10 degrees if possible) transmission, both for the ELF and VLF
>bands.
>
>Any suggestions as to where I might look?
>
>Thanks.
>
>-JJF

I'd start by looking at loop antenna design. A small (in terms of
wavelength) loop can be constructed to have a very sharp null. It is
bidirectional, but techniques exist to determine which of the two possible
directions is correct. Look for books on radio direction finding.

I can't think of any way to get anywhere near that kind of directivity for
transmitting at those frequencies unless you're willing to put up with
extremely low efficiency or unless you can settle for a fixed installation
with very widely spaced antennas.

Roy Lewallen, W7EL


From [e-mail] Thu Jan 02 17:23:16 1997
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From: Lili & Manu <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Limited space antenna
Date: Tue, 31 Dec 1996 16:13:01 -0800
Organization: University of South Florida
Lines: 38
Message-ID: <[e-mail]>
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X-Mailer: Mozilla 3.01Gold (Win16; I)

Hi,

I have a limited space (attic of the condo...20 ft by 20 ft by 7 ft at
the highest point) and would like to try something better than my
inverted V and my ISO loop
(by the way I like the iso loop, but i am trying to get something
better, if there is something...for 20,17,15,12,10 m)

I have heard good thing about the butterfly shape antenna.
Can someone tell me where I can find some drawings and dimensions of
that antenna (20 m and others).

I also heard so many things about the G5RV.... (102 ft)

Can I use a smaller length (ie: 26 ft ) ? ( I am not working on 40 and
80 M)
What length of ladder line should i use for 26 ft ?(if possible to use
26 ft)
Which type of ladder should be used? 300 ohms or 450 ohm ?
I have a MFJ 948 turner, can I use it for maching the G5rv ?
Is it going to be better than the iso loop ?

If you have any other small antenna design proposition (please give
tech. info) they will be all very very welcome.

Sorry for the "certainly" stupid questions, but as you can understand I
am not a HF master..
Thank you of your understanding and answers.

        HAPPY NEW YEAR 1997  ( I wish to all a wonderfull 23 rd cycle
.........)


Thanks 73 + 51

KS4EQ

[e-mail]


From [e-mail] Thu Jan 02 17:23:17 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: Re: Telecommunications Act of 1996
Date: Tue, 31 Dec 1996 16:24:41 -0800
Organization: SCVNET
Lines: 24
Message-ID: <[e-mail]>
References: <01bbf47b$ab267680$[e-mail]> <[e-mail]> <[e-mail]>
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Mike Watson wrote:

> I'm interested too.  I just moved into a new sub-division that has some
> deed restrictions "no externale transmitting or receiving antennas". The
> developer thought that since he was installing cable, there was no need
> for antennas.  I'd heard from several sources that these restrictions
> could not apply to Amateur Service because FCC and fFederal statutes
> took precidence.  His response was, "if your neighbors don't mind, I
> don't!"
> =====================================================================
> Mike Watson, WB0IKT

I used to wonder why hams bought houses in subdivisions that had deed
restrictions (also called CC&Rs).  That was until I tried to buy a house
here in Southern California.  Virtually every new home development has
antenna restrictions written into the deed.  "It's just the standard
restrictions to maintain property values" is the common response from
the sales drones.  There are literally no new homes available without
deed restrictions.

I ended up buying a 25-year-old house, which was built before cable was
common in the area.  No CC&Rs and 3 hams (and towers) in my block!

George Lyle, N7TNJ


From [e-mail] Thu Jan 02 17:23:20 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna,rec.radio.cb
Subject: Re: Q: Is a dipole any good for 11m?(Thankyou)
Date: Tue, 31 Dec 1996 16:25:53 -0800
Organization: A customer of Pacific Bell Internet Services
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J&J Mac wrote:
>
> Mr Hogan wrote:
> >
> > J&J Mac wrote:
> >
> > > Sorry Michael, I guess I was being a bit sarcastic.
> >
> > I hadn't noticed <g>
> >
> > > One of the hottest selling 11 AND 10 meter antennas is the Antron 99.
> > > It is a vertical dipole that is guised as a fiberglass sectional antenna
.
> > > For "better performance" the antron has a ground plane kit that helps
> > > reduce rfi by altering the radiation pattern.
> >
> > How much? Sounds great!
> >
> > Peace
> >
> > ,\\ichael
>
> They vary from place to place but I've seen them for around $50.00
>
> Jim..

If you can't find the Antron 99:  Scanner World, a dealer in Albany NY
sells a 1/2 wave vertical for 11 or 10 meters for about $50.  Radio Shack
also sells a 1/2 wave vertical for 11 meters.  My employer uses several
of the radio shack units which work well.  The Radio Shack antenna does
not have decoupling radials around the base.  I haven't seen the Scanner
World antenna, but the picture didn't show any radials.


From [e-mail] Thu Jan 02 17:23:21 1997
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From: "Dennis L. Wade" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: F/S RG-6 type cables w/BNC's
Date: Tue, 31 Dec 1996 17:15:45 -0800
Organization: S&C Communictions
Lines: 49
Message-ID: <[e-mail]>
Reply-To: [e-mail]
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I have the following cable assemblies for sale.  All have BNC

connectors on both ends.  Cable is Belden 9248 which is an RG-6/U type

coax with a dual shield and an impedance of about 75 ohms.  These appear

to be pulls from a video or Local Area Network and seem to be in very

good physical condition.  Cables are DC tested but not RF tested.  Would

make a good VHF/UHF antenna lead in.  Belden 9248 specs. are about 5 db

loss at 450 mhz per 100 ft., I think (may want to check yourself and

confirm).



   Prices are for pick-up/delivery in the Greater Sacramento area.  Add

UPS from zip 95608 for other areas.



       Qnty.          Length           Price



         1             53 ft.           $15.00

         1             48 ft.           $12.00

         1             45 ft.           $12.00

         1             55 ft.           $15.00

         1             40ft.            $10.00



    Reply via e-mail to  [e-mail].



    Have a Happy New Year



     Dennis Wade   KG6ZI   Carmichael, Calif.


From [e-mail] Thu Jan 02 17:23:22 1997
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From: macino <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 80 meter vertical vs dipole
Date: Tue, 31 Dec 1996 20:38:58 -0500
Lines: 47
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References: <[e-mail]>
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Ron Stordahl wrote:
>
> I am considering putting up a 1/4 wave vertical this summer.  From
> reading other posts here it appears the shunt fed is prefered to the
> insulated type.  I also realize that a fair number of radials will be
> required.  I should point out that my only interest is DX.  Here are
> some questions for the experienced:
>
> 1.  Is this likely to be a better performer than my current dipole, the
> center of which is at 80 feet and ends at 60 feet.
>
> 2.  How broad banded is such an antenna likely to be?  I would like to
> work from 3500 to 3850.  I prefer all the tuning to be automatic using
> my Alpha 87A.  Is this expecting too much?
>
> 3.  Would using the same vertical also on 160 be realistic.  I don't
> believe I can make this antenna 120 feet tall, but perhaps 80 feet will
> be possible.  Would increasing the height above 1/4 wave length on 80 in
> order to make 160 better work against me on 80.  80 being more important
> to me than 160.
>
> 4.  A 4 square is not possible, so lets not bring that up at all.
>
> Awaiting answers.
>
> Ron N5IN

 Hi Ron,

 I'll tell you what I would do. You have the ability to run
a live test. You already have the dipole there, so you only
need to add the vertical. We know that on the transmit side
that the vertical would work. Your concern should be the
noise on receive. So, I would go to a 'party store' and latch
onto a BIG balloon (4+ feet) and attach a lightweight wire to
it, fill it with 'party store' helium, and let the balloon up
the distance that you are planning on going up. Make sure you
have a safety line on the balloon (double up some 20 lb fishing
line). You can get by with a minimum ground, your not going to
transmit anyway. Take a listen to what you hear, and switch back and
forth to the dipole. Without a lot of work, you'll be
able to make the decision with your own ears. The balloon and helium
will probably set you back $30 - 50, depending on size of both. Besides,
all your neighbors that think hams are weird will have something to talk
about now that the Vikes are watching the Playoffs.

                   73 Jim W9LZ (go Bears..er next year)


From [e-mail] Thu Jan 02 17:23:23 1997
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From: [e-mail] (Fractenna)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: YET ANOTHER BREAKTHROUGH ON FRACTALS
Date: 1 Jan 1997 01:47:02 GMT
Organization: AOL http://www.aol.com
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Hi Roy-

I guess there are those that prefer having rubber coated rods next to
there ear. Hi.

HNY to All!

-Chip N1IR


From [e-mail] Thu Jan 02 17:23:23 1997
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From: "Cecil A. Moore" <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: Re: G5RV FACTS
Date: Tue, 31 Dec 1996 18:51:46 -0700
Organization: Delphi Internet Services Corporation
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[e-mail] wrote:
> By the way, Eznec seems to agree closely with the reading.

Hi Tom, before anyone else bad-mouths the G5RV, I think they should
model the antenna using the transmission line feature of EZNEC. On
80m and 40m, the parallel line section transforms a nasty impedance
to one that is close to resonance. The coax is connected to the
parallel line section near a current maximum so the SWR on the coax
is relatively low. A parallel cap across the parallel line will give
a perfect 1:1 SWR on the coax on 80m. Too bad it has to be removed
for the other bands.

73, Cecil, W6RCA, OOTC


From [e-mail] Thu Jan 02 17:23:25 1997
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From: macino <[e-mail]>
Newsgroups: rec.radio.swap,rec.radio.amateur.antenna
Subject: Re: WTB GEM QUAD, pay $200.00
Date: Tue, 31 Dec 1996 20:52:00 -0500
Lines: 21
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References: <[e-mail]>
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BOB DUCKWORTH wrote:
>
> Do you have a GEM Quad that you never put together?
> If so and you're ready to sell it, please let me know.
> I'm ready to pay $200 for an unused GEM Quad.
> Triband 20, 15, 10m version.
>
> 73
> -bob
> WB4MNF

Bob,
 You're about $140 light. Isn't a 2 element Gem Quad about $239 to $299?
Shipping (truck) is about another $100. You might be
able to get a hold of Bill Wall just east of Atlanta, and see
if he has enough stuff to get one of his Antenna Mart 5 band
quads together. They were a little more than the Gem Quad, but
built like a battleship. I've had both, and the Bill Wall
special is still standing.

                          Jim W9LZ


From [e-mail] Thu Jan 02 17:23:26 1997
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From: [e-mail] (Steve - KF2TI (Landing, NJ))
Newsgroups: rec.radio.amateur.antenna,rec.radio.amateur.misc
Subject: Re: No Hole VHF/UHF antenna for 1997 Jeep Grand Cherokee?
Date: Tue, 31 Dec 1996 20:58:03 -0500
Organization: Planet Access Networks - Stanhope, NJ
Lines: 29
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In article <[e-mail]>, [e-mail] says...
> Does anyone have any great ideas for this vehicle?  I've mounted a
> Kenwood TM941, and am interested in placing an antenna which will at
> least give me two of my three favorite bands.
>
> There's the on-glass possibility, or one of these all-way adjustables on
> the hatch.
>
> Anyone have any other ideas?
>
> -Bob
> WA2WLH/7
>

Best bet would be a triband antenna (if you're working all three bands)
and something along the lines of a Diamond k400 or a comet rs-820 mount
--
Steve KF2TI
ARRL LIFE Member

BACK TO THE SHADOWS AGAIN OOHHHHHH
OUT WHERE THE INDIAN'S YOU'RE FRIEND  OOOHHHH

WHERE THE VEGATABLES ARE GREEN
AND YOU CAN PEE INTO THE STREAM (and that's important you know)

I'M BACK TO THE SHADOWS AGAIN

doors open in 5 minutes


From [e-mail] Thu Jan 02 17:23:27 1997
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From: [e-mail] (KaSell4ham)
Newsgroups: rec.radio.amateur.antenna
Subject: Re: 80 meter antenna suggestions???
Date: 1 Jan 1997 02:04:39 GMT
Organization: AOL http://www.aol.com
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Frank, I use a shunt Feed 50 ft. tower.  It's a HDBX-48 ft. self-support.
At 32 ft junction, I come out about 2ft. down to base with insulator and
match with a capacitive L network.  Works great, I can retune for ssb or
cw or match with tuner.  I have a A3S with 40meter add-on at top, also
helps as a cap.hat.  It has very low angle of radiation, good for DX.
Currently, I have around 60-70 ground radials.  10 or more will work, more
the better.  I currently have about 196 countries worked, in just about 3
years.  I also have the tower shunt feed for 160 meters, a little harder
to do.  As you know, a vertical does not make a good receiving antenna.
That is one of my problems, I am using a loop antenna for receiving which
does help some.  Any questions, send me some E-Mail, At [e-mail]
73's es good DX
Ken Sell, KZ0X



From [e-mail] Thu Jan 02 17:23:29 1997
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From: [e-mail] (Fractenna)
Newsgroups: rec.radio.amateur.antenna
Subject: RE: YET ANOTHER BREAKTHROUGH ON FRACTALS
Date: 1 Jan 1997 02:12:21 GMT
Organization: AOL http://www.aol.com
Lines: 12
Message-ID: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

Hi Roy--

An amendation to your 'Flintstone' analogy: ...they use (300M)RADIO WAVES
And a (carbon button)MICROPHONE. and (Leyden jar) BATTERIES!

These should be about the right period for the golden age of the Marconi
monopole (give or take 20 years...) analogy.

Wireless then,,,wireless now!

73
Chip N1IR


From [e-mail] Thu Jan 02 17:23:29 1997
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From: [e-mail] (Fractenna)
Newsgroups: rec.radio.amateur.antenna
Subject: HNY To ALL ANTENNA Fans!
Date: 1 Jan 1997 02:36:15 GMT
Organization: AOL http://www.aol.com
Lines: 17
Message-ID: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
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Best in 97 from the (ever expanding) gang at 'Fractal'!

73!

Chip
       Hi
         Russ
                Phil
                    Lou
                           Al
                              Mary
                                   Jane
                                        Pat
                                              Bob

                                                       FRACTAL ANTENNA
SYSTEMS,Inc.


From [e-mail] Thu Jan 02 17:23:30 1997
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From: "Geoffrey " <[e-mail]>
Newsgroups: rec.radio.amateur.antenna
Subject: 160 & 80m DX antennas for limited space
Date: 1 Jan 1997 03:20:24 GMT
Organization: Pla-Net, Inc.--Full Service ISP--[phone]
Lines: 11
Message-ID: <01bbf792$a45c0300$d30bd8cd@default>
NNTP-Posting-Host: mercury3.ts.pla-net.net
X-Newsreader: Microsoft Internet News 4.70.1160

I am trying to figure out what would work best for a DX antenna on 80 &
160.  I currently have a G5RV at 30 feet and can't bust a pileup at all on
80.  I am considering either a dipole or vertical.  I have trouble getting
a dipole over 35 feet or so because of my location, so I am wondering if a
vertical at ground level would be better for me.  Does anyone have any
experience with the Butternut vertical for 80 & 160?


Geoffrey  KB9NNN
[e-mail]



From [e-mail] Thu Jan 02 17:23:39 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.antenna
Subject: NMO to 3/8" X 24 adapter?
Date: Tue, 31 Dec 1996 22:26:08 -0500
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Does anyone know if there is an adapter made for converting an NMO mount
to accept 3/8 x 24 threaded mobile antennas?

If so, please e-mail info on the source.

Tnx and 73...

de Tom


From [e-mail] Thu Jan 02 17:23:40 1997
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From: Token <[e-mail]>
Newsgroups: rec.radio.amateur.antenna,rec.radio.cb
Subject: Re: Q: Is a dipole any good for 11m?
Date: Tue, 31 Dec 1996 20:30:40 -0800
Organization: RidgeNET
Lines: 16
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Phil wrote:
>
> Did I miss something?
>
> Who said a dipole couldn't be vertically polarized?
>
> Dipoles work great and are dirt cheap to make.
>
> -> Phil
And two of them, one about 5% longer than the other and shorted
in the middle, and placed parallel to and about four feet from
the first dipole, work even better ;)

Later,

Token