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

Text File | 1997-02-01 | 2MB | 36,487 lines

The World of Ham Radio CD-ROM



From [e-mail] Wed Dec 11 20:08:23 1996
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From: [e-mail] ()
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: 1.5Ghz Antenna PreAmp
Date: Tue, 10 Dec 1996 04:08:25 GMT
Organization: CyberRamp.net, Dallas, TX [phone]/[phone] for info
Lines: 19
Message-ID: <58ih5i$6je$[e-mail]>
References: <58hpte$[e-mail]>
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[e-mail] (Paul H. Dunn) wrote:

>I've built a "Patch" antenna for the 1545 Mhz GPS band, and so far it
>seems to increase the received signal strength a bit, but not to my liking.

>Authors of a couple articles on the topic have referenced a "MARS6" op-amp
>that they've used in this application with some success.  I've not been
>able to cross reference it or find anything close in the catalogs and data
>books I have.

The MAR-6 is an RF Amplifier sold by Mini-Circuits.
It's specs are 9dB gain, DC-2Ghz, with a 3dB Noise Figure.
A MAR-6 is less than a dollar, in qty of 30.
For 30 bucks, you could get a lot of projects done...

Mini-Circuits can direct you to a distributor: [phone]





From [e-mail] Wed Dec 11 20:08:24 1996
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From: [e-mail] (Leon Heller)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: 1.5Ghz Antenna PreAmp
Date: Tue, 10 Dec 96 19:31:15 GMT
Organization: Home
Lines: 22
Message-ID: <[e-mail]>
References: <58hpte$[e-mail]>
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In article <58hpte$[e-mail]> [e-mail] "Paul H. Dunn" writes:

> I've built a "Patch" antenna for the 1545 Mhz GPS band, and so far it
> seems to increase the received signal strength a bit, but not to my liking.
>
> Authors of a couple articles on the topic have referenced a "MARS6" op-amp
> that they've used in this application with some success.  I've not been
> able to cross reference it or find anything close in the catalogs and data
> books I have.
>
> Anyone out there who can aim me in the right direction?

MAR MMICs (Monolithic Microwave ICs) are made by Mini-Circuits. Their
US number is [phone]. They are quite inexpensive, and very easy to
use, having 50R input and output impedances.

Leon
--
Leon Heller, G1HSM                | "Do not adjust your mind, there is
E-mail [e-mail]  |  a fault in reality": on a wall
Phone: [phone]         |  many years ago in Oxford.



From [e-mail] Wed Dec 11 20:08:25 1996
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From: Zack Lau <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: 1.5Ghz Antenna PreAmp
Date: Tue, 10 Dec 1996 10:19:37 -0500
Organization: American Radio Relay League
Lines: 16
Message-ID: <[e-mail]>
References: <58hpte$[e-mail]> <58ih5i$6je$[e-mail]>
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[e-mail] wrote:
>
> [e-mail] (Paul H. Dunn) wrote:
>
> >I've built a "Patch" antenna for the 1545 Mhz GPS band, and so far it
> >seems to increase the received signal strength a bit, but not to my liking.
> GaAs MMICs are worth considering.

See the technical manual at:

http://seti1.setileague.org/homepg.htm

The wideband preamp that covers the water hole
might be useful in your application.

Zack W1VT  [e-mail]


From [e-mail] Wed Dec 11 20:08:26 1996
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From: [e-mail] (Michael Pinneo)
Newsgroups: rec.radio.amateur.homebrew
Subject: 2m antenna tuner
Date: Tue, 10 Dec 1996 11:54:27 -0800
Organization: P1 Ltd.
Lines: 5
Message-ID: <[e-mail]>
NNTP-Posting-Host: cox10.batnet.com

Can anyone recommend a construction article for an antenna tuner/matching
network
for use at 144 MHz, 1kw cw?  Thanks.

Michael


From [e-mail] Wed Dec 11 20:08:27 1996
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From: [e-mail] (TIEMANN BRUCE)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: 2m antenna tuner
Date: 10 Dec 1996 22:38:42 GMT
Organization: University of Colorado, Boulder
Lines: 18
Message-ID: <58kopi$[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: spot.colorado.edu
NNTP-Posting-User: tiemann

In article <[e-mail]>,
Michael Pinneo <[e-mail]> wrote:
>Can anyone recommend a construction article for an antenna tuner/matching
>network
>for use at 144 MHz, 1kw cw?  Thanks.
>
>Michael

Bad idea... Unless the line is EXTREMELY low loss, you will lose most of
your power anyway.  A vastly better idea is to match the *antenna* to the
line, by fussing with the gamma match, element lengths, or whatever.  Then
the SWR on the line is low, and there's no need to have a tuner at all.
The reason people use tuners at HF is that there, coax, and especially
open wire line, do have low loss, and so can run at high SWR without
causing excessive losses.  Not so up at VHF or higher.

Bruce
N6URH


From [e-mail] Wed Dec 11 20:08:28 1996
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From: "Andy" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: 2N544 transistor?
Date: 7 Dec 96 19:35:23 GMT
Organization: University of Massachusetts, Amherst
Lines: 3
Message-ID: <01bbe475$d47d2b20$[e-mail]>
NNTP-Posting-Host: robby.oit.umass.edu
X-Newsreader: Microsoft Internet News 4.70.1155

Does anyone know about the 2N544 transistor?  I got a schemtic for a BFO
which requires it.  Thanks.
                                Andy, KB0MMU


From [e-mail] Wed Dec 11 20:08:29 1996
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From: Phil Heaton <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: 2N544 transistor?
Date: Sun, 08 Dec 1996 08:30:05 -0500
Organization: Nunya
Lines: 12
Message-ID: <[e-mail]>
References: <01bbe475$d47d2b20$[e-mail]>
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Andy wrote:
>
> Does anyone know about the 2N544 transistor?  I got a schemtic for a BFO
> which requires it.  Thanks.
>                                 Andy, KB0MMU

        It's a germanium PNP. An ECG126A will replace it.

Phil
--

 Phil Heaton, KE4KRT, [e-mail]


From [e-mail] Wed Dec 11 20:08:30 1996
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From: "Carl P. Gottsmann" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: 40m FT-243 xtals to trade 4 same!
Date: Mon, 2 Dec 1996 20:56:06 -0800
Organization: California State University, Chico
Lines: 32
Message-ID: <[e-mail]>
NNTP-Posting-Host: steroid.ecst.csuchico.edu
Mime-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII

Greetings all!
        I have some FT-243 xtals (and a couple of 80m) that I
would like to trade primarily for 40m CW xtals up to 7150 Khz.
Oddball freq's (eg. 7.038, 7.112 etc,) would be especially
welcome.
        Some of what I have would be of most use for going up to
15 or 10 meters (AM) phone...  during the upcoming sunspot cycle.
        Send me an e-mail and lets talk trades!
Here's what I've got to trade:

        3.735 Mhz
        3.885

        7.206.6 Mhz
        7.225
        7.240
        7.250
2 ea.   7.273.3
2 ea.   7.275
2 ea.   7.300
2 ea.   7.306.6
2 ea.   7.333.3
        7.350
        7.358.3
        7.375
2 ea.   7.400
        7.408.3

        Thanks, and best 73 from here!
                                Carl Gottsmann,  KN6AL +




From [e-mail] Wed Dec 11 20:08:31 1996
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From: Dean Arthur <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: 40m FT-243 xtals to trade 4 same!
Date: Sun, 08 Dec 1996 00:54:56 -0700
Organization: CyberHighway Internet Services
Lines: 3
Message-ID: <[e-mail]>
References: <[e-mail]>
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Will check my WW II boxed xtal sets and e-mail you the cw freqs I have.




From [e-mail] Wed Dec 11 20:08:32 1996
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From: woody white <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: 6m  Amplifier
Date: Wed, 04 Dec 1996 00:37:41 -0800
Organization: http://www.geocities.com/capecanaveral/3722
Lines: 42
Message-ID: <[e-mail]>
References: <[e-mail]>
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A possibility.... Either one of two circuits should fit your
requirements, even though they are "over kill".  the amp described by the
Motorola Co. paper "AR 313" is rated 300 watts out, 10-150 mhz at Vcc of
12 to 28 volts (I expect full pwr rating is for max voltage) from 15
watts drive.  The other is the paper titled "AR 305". This amp is
similar, except it requires a Vcc of 50 volts.  Your 7 watts should give
you about 150 out with plenty of "head-room" (they are linear).  They use
a rather expensive dual FET transistor (MFR141G or MRF151G,
respectively).   These amps should have a filter placed in the output.
This is not part of the circuit described.

There is a company in the US that sells all the parts to build one...
is: Communications Concepts, Inc.


Another possibility: Can you obtain an old low-band FM (~48 Mhz in US)
2-way?  Most solid state units will have a seperate PA board which
requires (usually) several tens to 100s of mwt drive using several
stages and will likely tune your freq.  I have had luck in isolating the
higher power stages so they can be driven from a high level source
without an attenuator.  This will work great for FM or CW.  If you need
linear, some of the PA modules can be modified to apply forward bias, but
the output must usually be derated (PEAK AM will need to be lower than
the saturated output level).  I also suspect the FET amps above will
provide much better linearity than biasing-up the PA module.

73, Woody

ernie wrote:
>
> Hi
> I'm looking for a tested design of a 7-10 w in ,70-100 w out,  54 Mhz
> solid-state PA.
> Thanks - Isaac, 4Z4TL

--
de  Woody (WB4QXE) -  [e-mail]
Electron Microscopist/Microanalysist,
Ham radio "homebrewer", shade tree mechanic,
'90 Nissan 240SX, wish still had my Mcycle too!
http://www.geocities.com/capecanaveral/3722
.


From [e-mail] Wed Dec 11 20:08:33 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: 6m quad
Date: 10 Dec 1996 04:29:08 GMT
Organization: AOL http://www.aol.com
Lines: 2
Message-ID: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

Looking for proven plans for a Quad anteena for 6m( 4 to 6 elements).
kd4rqe, [e-mail]


From [e-mail] Wed Dec 11 20:08:34 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: 8 Hz lightning receiver ????
Date: 2 Dec 1996 17:01:21 GMT
Organization: AOL http://www.aol.com
Lines: 30
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

Hi Bart

Find a copy of the Scientific American for May 1996. Author was Shawn
Carlson. Ifr that's impossible, I can send xerox . The schematic as shown
in the original article was full of errors, but the filter circuit is OK
if you change all the caps from Farads to uFarads. Leave the passive out
put filter as shown. That circuit is a 60 Hz notch filter. (Come to think
about it, you'd want to scale that to 50 Hz where you are, but it's a
piece of cake.)

Their notice:

To get involved in the detecting network, send $5.00 to:
The society for amateur scientists
4951 D Clairemont Square
Suite 179
San Diego, CA 92117

or download the info for free from

HTTP://www.thesphere.com/SAS

or from Scientific Americans area on America on-line

Good luck

W4ZCB

I do not belong to the organization



From [e-mail] Wed Dec 11 20:08:35 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: AM 6154 Amp input coupling
Date: Sun, 08 Dec 1996 21:35:19 GMT
Organization: United States Internet, Inc.
Lines: 7
Message-ID: <58ffn8$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: pulaski-slip2.dynamic.usit.net
X-Newsreader: Forte Free Agent 1.0.82

Does anyone out there have any experience convering a AM 6154(Fair
Radio Sales) amplifier to two meters. I am interested in the changes
to theamp input coupling for more output power.
Tnx
Ron
[e-mail]



From [e-mail] Wed Dec 11 20:08:36 1996
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From: [e-mail] (Brian Carling)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: AM 6154 Amp input coupling
Date: Tue, 10 Dec 1996 18:23:53 GMT
Organization: Monumental Network Systems
Lines: 20
Distribution: inet
Message-ID: <58kk5g$[e-mail]>
References: <58ffn8$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: bry.mnsinc.com
X-Newsreader: Forte Free Agent 1.0.82

[e-mail] whistled a happy tune like:

|>Does anyone out there have any experience convering a AM 6154(Fair
|>Radio Sales) amplifier to two meters. I am interested in the changes
|>to theamp input coupling for more output power.
|>Tnx
|>Ron
|>[e-mail]

Hi there Ron - I used one for a while and loved it!
I got 200-400 watts out with no modification, and I think I only used like
10 watts of drive.
They are a GREAT amp. I wish I was still on 2m and had it!


73 from Bry  (((Amateur Radio G3XLQ / AF4K)))
http://www.mnsinc.com/bry
E-mail:  [e-mail]
Home of MEGALIST ham radio files, SWL info. etc. etc.



From [e-mail] Wed Dec 11 20:08:36 1996
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From: [e-mail] (Michael Horowitz)
Newsgroups: rec.radio.amateur.homebrew,rec.video.cable-tv
Subject: ANSWER - O'scope- How to ...
Date: Sat, 07 Dec 1996 16:17:43 GMT
Organization: Erol's Internet Services
Lines: 4
Message-ID: <58bqla$[e-mail]>
NNTP-Posting-Host: spg-as18s35.erols.com
X-Newsreader: Forte Free Agent 1.0.82
Xref: news1.epix.net rec.radio.amateur.homebrew:21843 rec.video.cable-tv:28536

The answer turned out to be "Don't be confused between the VIDEO
output of the VCR and the RF OUTPUT of the VCR.  The VIDEO output was
what gave me what I was looking for. - Mike



From [e-mail] Wed Dec 11 20:08:37 1996
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From: [e-mail] ([e-mail])
Newsgroups: rec.radio.amateur.homebrew
Subject: Anybody Know of a HomePage for Avontek ?
Date: Tue, 03 Dec 1996 23:35:46 GMT
Organization: BuffNET
Lines: 8
Message-ID: <582dvn$[e-mail]>
NNTP-Posting-Host: eppp50.buffnet.net
X-Newsreader: Forte Free Agent 1.0.82

Like to get info on some ot their GaAsFETs.

Any Ideas ??

Thanks

 --  db  --



From [e-mail] Wed Dec 11 20:08:38 1996
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From: woody white <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Anybody Know of a HomePage for Avontek ?
Date: Wed, 04 Dec 1996 00:40:16 -0800
Organization: http://www.geocities.com/capecanaveral/3722
Lines: 24
Message-ID: <[e-mail]>
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X-Mailer: Mozilla 2.01E (Win16; I)

Let me know if you find one...

Avantek is now owned by Hewlett Packard, as I understand.  Tried looking
at HP, but didn't find at the time.   Pennstock (I think) sells the
parts.
73, Woody

[e-mail] wrote:
>
> Like to get info on some ot their GaAsFETs.
>
> Any Ideas ??
>
> Thanks
>
>  --  db  --

--
de  Woody (WB4QXE) -  [e-mail]
Electron Microscopist/Microanalysist,
Ham radio "homebrewer", shade tree mechanic,
'90 Nissan 240SX, wish still had my Mcycle too!
http://www.geocities.com/capecanaveral/3722
.


From [e-mail] Wed Dec 11 20:08:39 1996
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From: [e-mail] (Jim Potter)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Anybody Know of a HomePage for Avontek ?
Date: Wed, 04 Dec 1996 23:05:49 GMT
Organization: The Santa Fe Institute
Lines: 23
Message-ID: <[e-mail]>
References: <582dvn$[e-mail]>
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[e-mail] ([e-mail]) wrote:

>Like to get info on some ot their GaAsFETs.
>
>Any Ideas ??
>
>Thanks
>
> --  db  --
>
They're owned by HP these days. try www.hp.com

Also, the spelling is Avantek which might make them show up through a
search engine.

Jim


James M. Potter, President              TEL: [phone]
JP Accelerator Works, Inc.              FAX: [phone]
2245 47th Street                        EMAIL: [e-mail]
Los Alamos, NM 87544-1604               URL: http://www.jpaw.com



From [e-mail] Wed Dec 11 20:08:40 1996
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From: [e-mail] (Joe Landis)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Anybody Know of a HomePage for Avontek ?
Message-ID: <1996Dec4.195356.659@main03>
Date: 4 Dec 96 19:53:56 EST
References: <582dvn$[e-mail]>
Distribution: world
Organization: North American Drager - Telford, PA
Lines: 15

In article <582dvn$[e-mail]>, [e-mail] (daveb@buffnet
.net) writes:
> Like to get info on some ot their GaAsFETs.
>
> Any Ideas ??
>
> Thanks
>
>  --  db  --
Avantek was acquired by HP in 1991. You'll find info on many of their products
in the HP Communications Products Designers Catalog. Try calling your local HP
sales office.
Joe - AA3GN
--
[e-mail] - speaking only for myself, of course
No, this is not a sig.


From [e-mail] Wed Dec 11 20:08:41 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.net!news.idt.net!feed1.news.erols.com!news.ecn.uoknor.edu!munnari.OZ.AU!comp.vuw.ac.nz!news.hn.netlink.co.nz!canterbury.ac.nz!usenet
From: [e-mail] (Winton Bell)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Anyone built their own UHF duplexer?
Date: 6 Dec 1996 23:37:47 GMT
Organization: Psychology Department UoC
Lines: 19
Message-ID: <58aaob$[e-mail]>
References: <[e-mail]> <01bbdbf0$1edf3840$[e-mail]> <57gi7r$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: 132.181.218.55
Mime-Version: 1.0
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In article <57gi7r$[e-mail]>, [e-mail]
says...
>
>Ed Burress <[e-mail]> wrote in article
><[e-mail]>...

>>>ARRL Antenna book for
>>> building your own duplexer for the 2 meter band.  I was
>>> wondering if anyone has similar plans or pointers to design
>>> formulas, plans, etc. for the 70 cm band?
>>> I have access to a machine shop, and would like the chalenge
.>I believe there were plans in either Ham Radio or QST several years ago
to
>build 70cm duplexers. I seem to remember they used PC board material.
>
.>73...    Mark   AA7TA
I have seen this article recently, will try to locate for you. 73 Winton.




From [e-mail] Wed Dec 11 20:08:42 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
Organization: kg7fu
Lines: 52
Message-ID: <01bbe021$c538d7c0$[e-mail]>
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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 20:08:43 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 20:08:44 1996
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From: [e-mail] (Michael P. Deignan)
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: 3 Dec 1996 13:37:31 -0500
Organization: The Ace Tomato Company
Lines: 29
Message-ID: <581s1b$[e-mail]>
References: <01bb739f.8e9f00c0$[e-mail]> <[e-mail]> <01bbe021$c538d7c0$[e-mail]> <[e-mail]>
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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 20:08:46 1996
Path: news1.epix.net!news3.epix.net!uunet!in3.uu.net!199.74.141.7!news.callamer.com!news.alt.net!newspost1.alt.net!usenet
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.
Lines: 50
Message-ID: <[e-mail]>
References: <01bb739f.8e9f00c0$[e-mail]> <57ac8a$[e-mail]> <[e-mail]> <[e-mail]> <57qr02$[e-mail]> <[e-mail]>
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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 20:08:48 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]
References: <01bb739f.8e9f00c0$[e-mail]>
 <57ac8a$[e-mail]> <[e-mail]>
 <[e-mail]> <57qr02$[e-mail]>
 <[e-mail]> <01bbe021$c538d7c0$[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 20:08:49 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
Organization: Texas Instruments
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Message-ID: <589j4e$[e-mail]>
References: <01bb739f.8e9f00c0$[e-mail]> <57ac8a$[e-mail]> <[e-mail]> <[e-mail]> <57qr02$[e-mail]> <[e-mail]> <01bbe021$c538d7c0$[e-mail]> <[e-mail]>
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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 20:08:50 1996
Path: news1.epix.net!news3.epix.net!uunet!in2.uu.net!144.212.100.12!news.mathworks.com!EU.net!usenet2.news.uk.psi.net!uknet!usenet1.news.uk.psi.net!uknet!uknet!lyra.csx.cam.ac.uk!news.ox.ac.uk!sable.ox.ac.uk!quee0363
From: Ronan Bellabarba <[e-mail]>
Newsgroups: sci.chem.organomet,sci.engr.chem,sci.chem,comp.os.ms-windows.networking.misc,comp.infosystems.gopher,131,rec.sport.football.australian,alt.asian-movies,rec.skiing.snowboard,rec.music.makers.guitar.acoustic,rec.radio.shortwave,aus.invest,rec.radio.amateur.homebrew,rec.radio.amateur.antenna,rec.radio.amateur.misc,[e-mail],rec.autos.vw,[e-mail],alt.2600,k12.lang.deutsch-eng,k12.lang.francais,aus.ads.forsale,aus.ads.forsale.computers
Subject: Re: BAN/INTERNET
Date: Tue, 3 Dec 1996 11:31:00 +0000
Organization: Oxford University
Lines: 9
Message-ID: <[e-mail]>
References: <[e-mail]>
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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 20:08:52 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!quagga.ru.ac.za!munnari.OZ.AU!news.Hawaii.Edu!news
From: Dettol <[e-mail]>
Newsgroups: sci.chem.organomet,sci.engr.chem,sci.chem,comp.os.ms-windows.networking.misc,comp.infosystems.gopher,131,rec.sport.football.australian,alt.asian-movies,rec.skiing.snowboard,rec.music.makers.guitar.acoustic,rec.radio.shortwave,aus.invest,rec.radio.amateur.homebrew,rec.radio.amateur.antenna,rec.radio.amateur.misc,[e-mail],rec.autos.vw,[e-mail],alt.2600,k12.lang.deutsch-eng,k12.lang.francais,aus.ads.forsale,aus.ads.forsale.computers
Subject: Re: BAN/INTERNET
Date: Tue, 03 Dec 1996 16:42:07 -1000
Organization: university of hawaii
Lines: 16
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
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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 20:08:53 1996
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!xara.net!emerald.xara.net!xara.net!agate.xara.net!news
From: "Kevin A Young" <[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: battery box
Date: 7 Dec 96 19:20:16 GMT
Organization: Bear Graphics Ltd.
Lines: 5
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NNTP-Posting-Host: stan.stargate.co.uk
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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 20:08:54 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!news.indy.net!news-out.internetmci.com!newsfeed.internetmci.com!howland.erols.net!portc02.blue.aol.com!audrey01.news.aol.com!not-for-mail
From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Baycom software
Date: 4 Dec 1996 23:36:51 GMT
Organization: AOL http://www.aol.com
Lines: 4
Message-ID: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

     I'm using Baycom version 1.5 and when I transmit, it sends no data
and doesn't stop transmitting unless I shut down the program. It recieves
fine. Any suggestions?
     I can be reached at [e-mail]


From [e-mail] Wed Dec 11 20:08:55 1996
Newsgroups: rec.radio.amateur.equipment,rec.radio.amateur.homebrew
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From: Monty Wilson <[e-mail]>
Subject: Broken Palomar active audio filter
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One day I just switched the audio filter on and no sound came
out.  When I switch it off, it patches the audio through to
the speaker just fine, but with it turned on, no sound comes
through at all, regardless of the setting of the frequency knob,
selectivity switch, or bass filter switch.

Does anyone have any documentation, or a schematic?

Please email.

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




From [e-mail] Wed Dec 11 20:08:55 1996
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From: Tom Rehnstrom <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Building a weather satellite reciever
Date: Tue, 03 Dec 1996 13:41:59 -0800
Organization: ICL
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Hi all,

Where can I find some information about building a weather satellite
reciever (NOAA etc, 137.xx Mc)?

Thanx.
/Tom    [e-mail]


From [e-mail] Wed Dec 11 20:08:56 1996
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From: [e-mail] (gudmundur)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Building a weather satellite reciever
Date: 5 Dec 1996 05:11:06 GMT
Organization: silverlake stable
Lines: 21
Distribution: world
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In article <[e-mail]>, [e-mail]
says...
>
>Hi all,
>
>Where can I find some information about building a weather satellite
>reciever (NOAA etc, 137.xx Mc)?
>
>Thanx.
>/Tom    [e-mail]
Tom, can't help on the receiver information. However, if you want
wesat pictures, it may be easier to copy the already processed
pictures on the hf bands. You should have good clear copy on signals
from canada and halifax nova scotia. Find these between 3 and 8.5
mhz with good copy in the early evening. You can find good display
software from dl5yec called HAMCOMM. It will display rtty,cw,fax and
sstv on a vga monitor. Many many more sources of software also.
  Happy hunting. (I once owned a military wefax receiver that weighed
about 70 pounds. Still have it, but haven't used it in years. Found
that the hf pictures from Canadian Metoc and NOAA were far better!



From [e-mail] Wed Dec 11 20:08:57 1996
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From: Jerry Robinson <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Building a weather satellite reciever
Date: 7 Dec 1996 01:03:39 GMT
Organization: CCT
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Message-ID: <58afpb$[e-mail]>
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Try Hamtronics.  They have a nice looking dedicated Wx sat receiver



From [e-mail] Wed Dec 11 20:08:58 1996
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From: [e-mail] (Richard Hosking)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Building a weather satellite reciever
Date: Sat, 07 Dec 1996 06:20:50 GMT
Organization: iiNet Technologies Pty Ltd
Lines: 19
Message-ID: <58b1jf$[e-mail]>
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Tom Rehnstrom <[e-mail]> wrote:

>Hi all,

>Where can I find some information about building a weather satellite
>reciever (NOAA etc, 137.xx Mc)?

>Thanx.
>/Tom   [e-mail]
Cirkit UK had a weather satellite receiver kit some years ago and I
think they still have. You will need some software to decode the
pictures however. Many people seem to use the Lindenblad antenna
whioch is an omnidirectional device with crossed dipoles at 45 degrees

Richard Hosking
VK6BRO
[e-mail]
http://www.iinet.net.au/~richardh



From [e-mail] Wed Dec 11 20:08:59 1996
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From: Dean Arthur <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Building a weather satellite reciever
Date: Sun, 08 Dec 1996 01:08:37 -0700
Organization: CyberHighway Internet Services
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Ramsey Electronics in New York will sell you the construction manual for
Weather Satellite Receiver for five dollars. Order one of their catalogs
at 1-716-924-4560.

They also have kits for 6M, 2M, 1.25M and 70 cM. These come with 12
channel switching from the entire band on a diode matrix.

But you can get all the freqs available for each unit: i.e. 40-60 Mhz on
6M; 140-180 on 2M; 210-260 on 1.25; and 430-470 on 70 cM with use of BCD
switchess and EPROMs or EEPROMs kit available from Technologic Concepts,
1803 Mission Street-Ste. 308, Santa Cruz, Cal.95060




From [e-mail] Wed Dec 11 20:09:00 1996
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From: Dean Arthur <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Building a weather satellite reciever
Date: Sun, 08 Dec 1996 01:13:29 -0700
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If you live in metro area, or in vicinity of airport or other high rf
saturated area you might consider El Cheapo trash can filter. Article in
one of this year's issues of 73 Amateur Radio Today has article on using
a 25 or 30 gal galvanized trash can to build a weather receiver filter
with about 40dB attnuation of signals either side of weather freq.



From [e-mail] Wed Dec 11 20:09:01 1996
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From: [e-mail] (Michael Horowitz)
Newsgroups: rec.video.cable-tv,rec.radio.amateur.homebrew
Subject: Cable noise???
Date: Tue, 10 Dec 1996 11:12:35 GMT
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I'm looking at the video signal coming out the back of my VCR, and see
the classic horizontal sync pulse, color burst and video; however,
there is a faint trace, running horizontally, at the lowest point of
the horizontal sync pulse. This means that unless I can clean up the
signal, I can't use the pulse as a trigger. Anyone have an idea how
the signal can be cleaned up? - Mike



From [e-mail] Wed Dec 11 20:09:02 1996
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From: [e-mail] (Stephen Muther)
Newsgroups: rec.video.cable-tv,rec.radio.amateur.homebrew
Subject: Re: Cable noise???
Date: 10 Dec 1996 10:27:07 -0800
Organization: BEST Internet Communications
Lines: 38
Message-ID: <58ka1r$[e-mail]>
References: <58j61p$[e-mail]>
NNTP-Posting-Host: shellx.best.com
Xref: news1.epix.net rec.video.cable-tv:28601 rec.radio.amateur.homebrew:21921

In article <58j61p$[e-mail]>,
Michael Horowitz <[e-mail]> wrote:
>I'm looking at the video signal coming out the back of my VCR, and see
>the classic horizontal sync pulse, color burst and video; however,
>there is a faint trace, running horizontally, at the lowest point of
>the horizontal sync pulse. This means that unless I can clean up the
>signal, I can't use the pulse as a trigger. Anyone have an idea how
>the signal can be cleaned up? - Mike
>

I'm not sure what kind of noise you are seeing, but here are some
general things I've found about scope triggering on video:

The best O-scopes to use for video waveforms tend to be the Asian
imports like Hitachi, Anritsu and some of the others that appear
under domestic brand names like Sencore, B&K etc.  What you will
notice about these is that they have video mode triggering
built in.  These trigger modes are usually marked TV-H or TV-V
for horizontal or vertical interval triggering.  These units
appear to be designed with TV service in mind and are very good
even with a lot of noise on the waveform.  The drawback is that
these scopes are not the fastest in the world and don't compare
well to the better Tek scopes for high frequency measurement.

If you have a scope that does not have TV mode triggering, you
can build your own using an LM1881 (see National's web page).
The sync detected outputs from the 1881 is clean and can be used
to provide external trigger to your scope.  You just need to
make sure that the video level at the input to the LM1881 is
within the device limits.  If your scope has a buffered output
from one of its probe channels, this is generally the best place
to sniff out some video to drive the 1881.


Good Luck,

Steve Muther WF6R



From [e-mail] Wed Dec 11 20:09:03 1996
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From: Chris Barham <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Cable noise???
Date: Tue, 10 Dec 1996 18:30:00 +0000
Organization: home
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References: <58j61p$[e-mail]>
Reply-To: [e-mail]
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X-Newsreader: Newswin Alpha 0.9.1

In article: <58j61p$[e-mail]>  [e-mail]
(Michael Horowitz) writes:
>
> I'm looking at the video signal coming out the back of my VCR, and see
> the classic horizontal sync pulse, color burst and video; however,
> there is a faint trace, running horizontally, at the lowest point of
> the horizontal sync pulse. This means that unless I can clean up the
> signal, I can't use the pulse as a trigger. Anyone have an idea how
> the signal can be cleaned up? - Mike

If you're triggering your scope at line rate I'd guess you're seeing the
broads ( UK-speak for vertical sync ) running through at field rate.
These would be fairly faint as they're not there all the time :-)
As it's of very low frequency, compared to the horiz sync, it shouldn't
be a problem...
However you might find the output from your VCR is pretty unstable.
What device are you trying to trigger?

--
Chris Barham, G4MYB@GB7ODM      :
Video editor, Manchester UK.    :
PGP key available               :
[e-mail]       :




From [e-mail] Wed Dec 11 20:09:04 1996
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From: [e-mail] (Gary Fiber)
Newsgroups: rec.video.cable-tv,rec.radio.amateur.homebrew
Subject: Re: Cable noise???
Date: Wed, 11 Dec 1996 13:35:31 GMT
Organization: Chambers Multimedia Connection
Lines: 12
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References: <58j61p$[e-mail]> <58ka1r$[e-mail]>
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>The best O-scopes to use for video waveforms tend to be the Asian
>imports like Hitachi, Anritsu and some of the others that appear
>under domestic brand names like Sencore, B&K etc.

KENWOOD actually made the B&K scopes for sometime, not sue if they still do
though.

Gary.





From [e-mail] Wed Dec 11 20:09:05 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Capacitance triggered iambic key
Date: 10 Dec 1996 20:49:48 GMT
Organization: AOL http://www.aol.com
Lines: 20
Message-ID: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

      Several years ago I built (from a magazine article, as I recall) an
iambic hand key that was triggered by body capacitance.  This was the
slickest, most simple and easy to operate key I have ever used.

      Unfortunately, my key was demolished (almost beyond recognition)
when I moved several years ago. Now that I am becoming active in radio
again, I would like to build another.

      The circuit seems to consist of 3 unidentifiable transistors (small
d-shaped plastic case type), 2 small electrolitic caps, and maybe 3 or 4
resistors.

      Could anyone help me out with the schematic and parts list for this
little jewel?  I don't have an extensive library of past issues of amateur
radio magazines but reference to a past article would certainly be better
than nothing.

Thanks and 73

Roy    K9ER


From [e-mail] Wed Dec 11 20:09:06 1996
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From: [e-mail] (Chuck Hanavin)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Coax connectors impedence
Date: 11 Dec 1996 20:50:06 GMT
Organization: University of Delaware, Newark
Lines: 33
Message-ID: <58n6pu$[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: stimpy.eecis.udel.edu

In article <[e-mail]>,
Jeanne Pitz <[e-mail]> wrote:
>Hi,
>I have  a dumb question I hope someone will help me with. I have some
>coax connectors I bought to use on a homebrew antenna. I don't know
>now if they are 50 ohm or 75 ohm impedence. (I didn't realize it when
>I bought them and they aren't marked.) Is there an easy way to tell?
>Would 50 ohm connectors have some physical telling difference or can
>I measure them with me ohm meter to tell?
>
>Thanks for your help.
>
>--
>Regards,
>Jeanne
>+-------------------------------------------------------------------------+
>|Jeanne Pitz, Ph.D.                       Mixed Signal Design Department  |
>|[e-mail]                             Texas Instruments, Inc.         |
>|MSGid JKP                                MS 8213 PO BOX 655303           |
>|972-997-3759                             Dallas, TX 75265                |
>|                                                                         |
>| Do not go where the path may lead, go instead where there is no path    |
>| and leave a trail. -Ralph Waldo Emerson                                 |
>+-------------------------------------------------------------------------+


I'm no expert, and I'm not so sure if connectors are actually designed
to have a certain impeadance. I've seen BNC connectors that were
designed for 50 ohm cable and 75 ohm cable, The end of the cable is
the same. Unless you're doing microwave stuff, it probally doesn't
matter. I am sure of one thing, though, you're not going
to measure the impeadnace with an ohm meter!



From [e-mail] Wed Dec 11 20:09:07 1996
Newsgroups: rec.radio.amateur.homebrew
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From: [e-mail] (innovative technologies)
Subject: Converter for bands outside of scanner range
X-Nntp-Posting-Host: p6.ta3.actcom.co.il
Message-ID: <[e-mail]>
Sender: [e-mail] (News)
Reply-To: [e-mail]
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Date: Tue, 3 Dec 1996 22:39:35 GMT
Lines: 21

Hi,

I'm looking for a converter to extend the range of my PRO-36 scanner
(limited to 512MHz). I've heard such beasts exist.
It could either be a complete product, a kit (should be simple
actually) or just a schematic and article of a proven design. Any
leads to such products or companies would be appreceated.



(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 20:09:08 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Cu-Seeme Video conferencing
Date: Fri, 06 Dec 1996 16:32:30 GMT
Organization: CMDS News machine
Lines: 18
Message-ID: <[e-mail]>
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Does anyone know of anyone using Video Conferencing on
computer/internet in conjunction with amateur redio? I have been in
contact with hundreds of people from around the world on Cu-Seeme and
have run into only one ham. Is there a freq. HF or VHF where hams may
hang out that use both modes..computer and radio. I believe this would
be a natural progression  from Slow Scan.  We now can SEE the people
we are in QSO with.

If you are interested in setting up a sched. and have Video
COnferencing capabilities or are just interested drop me an e-mail,


73's
Charlie

[e-mail]


From [e-mail] Wed Dec 11 20:09:09 1996
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From: [e-mail] (Pedro Pedroso)
Newsgroups: rec.radio.amateur.homebrew
Subject: CW-N Filter Adaption ??
Date: 9 Dec 1996 13:03:45 GMT
Organization: Instituto Superior Tecnico
Lines: 25
Message-ID: <58h2nh$[e-mail]>
NNTP-Posting-Host: alfa.ist.utl.pt
X-Newsreader: TIN [version 1.2 PL2]

        Hello !

        I just bought a CW-N filter for my Icom IC-725.
        The filter recomended on the manual is the FL-101, but the
        one I got is the FL-63 (used on the 735).
        The socket to connect the filter are different, but I have already
        made an adaptor so it can be pluged in.
        The question is WILL THE FL-63 WORK AS THE FL-101 ???
        They are both for the same freq and have the same caracteristics
        (250Hz/-6dB).
        I need to know if I can use the filter or must I get the FL-101 ??

        Thanks !
                                VY 73 de CT1ELP

--


 | Pedro Pedroso                        |                            |
 | [e-mail]               |  CT1ELP                    |
 | Eng. Electrotecnica e Computadores   |  Founder member of GPDX    |
 | (Telecomunicacoes e electronica)     |                            |
 ---------------------------------------------------------------------
 | Address: P.O.Box 116 , 2806 Almada Codex , PORTUGAL               |
 ---------------------------------------------------------------------


From [e-mail] Wed Dec 11 20:09:10 1996
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Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Dampening...
Message-ID: <[e-mail]>
From: [e-mail] (Bill Moore)
Date: 5 Dec 96 17:42:39 EST
References: <[e-mail]>
Nntp-Posting-Host: muv62.marshall.edu
X-Newsreader: Yet Another NewsWatcher 2.1.8
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In article <[e-mail]>, [e-mail] wrote:

> Phil, K5PC (what a nice suffix) rightly pointed to my mistake in using a wor
d
> "dumping" for an ordinary resistor instead of discussing price reductions :-
)
   ^^^^^^^
> I even spell-checked that posting but I needed more sophisticated semantics
> test.  On the other hand, English is NOT my mother tongue and I begun lernin
g
> it late at the age of 20...
> ALC overshoots are real shame with modern radios equiped with a lot of micro
-
> processors.  They should be cured at the source and NOT late in the chain...
> However, tubes can survive them, poor MOSFET's don't...
> 73 de Mario, S56A, N1YU.

Realizing that I am at great risk of being accused of picking a language nit..

Mario -

From the subject line in this post, I get the impression that the correction
offered to you was, perhaps, a greater error than the original mistake.

I surmise that the word you were meaning to use was DAMPING, but that you were
advised that it was damPENing.  A lot of native speakers of English make this
mistake, using dampening when they mean damping.

To dampen is to make wet.
To damp is to cause to die out, to reduce, attenuate, suppress.

So, if one is concerned about ALC overshoots, I would assume one would want to
suppress them, not put water on them.

As an undergraduate, I saw an Elec. Engr. professor absolutely skewer a studen
t
over this.  I've never forgotten it.

As I said, I may be accused of being excessively picky.  However, use of the
word dampen is mistaken, however widespread it may be.

Shields up.

de W5IMJ

--

Bill Moore
[e-mail]
http://webpages.marshall.edu/~moorej/
Babe, you're just a wave, you're not the water.  J.D. Gilmore


From [e-mail] Wed Dec 11 20:09:11 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!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.homebrew
Subject: Re: Dampening...
Date: 8 Dec 1996 18:25:05 GMT
Organization: AOL http://www.aol.com
Lines: 25
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] (Bill Moore) writes:

>> ALC overshoots are real shame with modern radios equiped with a lot of
>micro-
>> processors.  They should be cured at the source and NOT late in the
>chain...
>> However, tubes can survive them, poor MOSFET's don't...
>> 73 de Mario, S56A, N1YU.
>
>Realizing that I am at great risk of being accused of picking a language
>nit..
>
>Mario -

Mario wording sounds ok to me. It is the technical content that matters,
and he has a good grasp of things. IMHO, that is what matters.

Too many people can write absolute techincal rubbish that sounds perfect.

Mario, the overshoot can trigger a tank arc in a tube type PA. I've seen
this happen often. Under the right conditions, it can be almost as bad as
shorting the output jack!

73 Tom


From [e-mail] Wed Dec 11 20:09:12 1996
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From: [e-mail] (Phil Clements)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Dampening...
Date: 10 Dec 1996 04:11:32 GMT
Organization: Your Organization
Lines: 25
Message-ID: <58intk$[e-mail]>
References: <[e-mail]> <[e-mail]>
NNTP-Posting-Host: a1p37.connect.net
X-Newsreader: WinVN 0.92.1

In article <[e-mail]>, [e-mail] (
Bill Moore) says:
>
>>From the subject line in this post, I get the impression that the correction
>offered to you was, perhaps, a greater error than the original mistake.
>
>snip......
>
>To dampen is to make wet.
>To damp is to cause to die out, to reduce, attenuate, suppress.
>
>snip.....
>
>Shields up.
>
>de W5IMJ
>
My appologies to Mario and my thanks to you, Bill, for pointing out the
error.

However, when I was taming a 4-1000A amp a few years ago, I actually had
to "dampen" the suppressor, as it "crispy-crittered" (Texas slang for
burned up) while tuning up for the first time on 10 meters!

(((73)))
Phil, K5PC


From [e-mail] Wed Dec 11 20:09:12 1996
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From: [e-mail] (Mike Kraml)
Newsgroups: rec.radio.amateur.homebrew
Subject: Dentrol Clipperton L Amp - too much current! ?
Date: Sun, 08 Dec 96 10:27:45 GMT
Organization: Internet 1st, Inc
Lines: 14
Message-ID: <58ffsl$[e-mail]>
NNTP-Posting-Host: acs_ws1.i1.net
X-Newsreader: News Xpress 2.0 Beta #2

Hello all: Please help.  I just purchased a Dentron Clipperton Amp,
with 4 - 572B tubes.  The amp seems to require a lot of plate current
to get going.  That is, with 40 watts drive, I get 700 watts out, with
1 Amp plate current being drawn.  The high voltage is about 1500
volts.  Pretty bad efficiency at about 47%.  If I push it harder, plate
current goes beyond 1 amp, and arcing begins (arced once anyway).
This is in "low" power mode, 1500 volts, if I kick it to high power or
about 2200 volts, I can get almost 1000watts out, but with 2200watts
in.  I cannot drive it harder that say 50 watts or so without plate current
going beyond 1 amp input.  I can't even back it off with the load or
tune.  Is this normal for this amp?  Will I blow it if I run it at 1 amp
plate current in?

Thanks in advance, 73 all, Mike... - WQ0N  - email: [e-mail]


From [e-mail] Wed Dec 11 20:09:14 1996
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From: [e-mail] (W6KKT Jesse)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Dentrol Clipperton L Amp - too much current! ?
Date: Mon, 09 Dec 1996 19:27:40 GMT
Organization: Microserve Information Systems (800)-380-INET
Lines: 26
Distribution: world
Message-ID: <[e-mail]>
References: <58ffsl$[e-mail]>
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X-Newsreader: Forte Agent .99e/16.227

On Sun, 08 Dec 96 10:27:45 GMT, [e-mail] (Mike Kraml) wrote:

>Hello all: Please help.  I just purchased a Dentron Clipperton Amp,
>with 4 - 572B tubes.  The amp seems to require a lot of plate current
>to get going.  That is, with 40 watts drive, I get 700 watts out, with
>1 Amp plate current being drawn.  The high voltage is about 1500
>volts.  Pretty bad efficiency at about 47%.  If I push it harder, plate
>current goes beyond 1 amp, and arcing begins (arced once anyway).
>This is in "low" power mode, 1500 volts, if I kick it to high power or
>about 2200 volts, I can get almost 1000watts out, but with 2200watts
>in.  I cannot drive it harder that say 50 watts or so without plate current
>going beyond 1 amp input.  I can't even back it off with the load or
>tune.  Is this normal for this amp?  Will I blow it if I run it at 1 amp
>plate current in?
>
>Thanks in advance, 73 all, Mike... - WQ0N  - email: [e-mail]
Hi Mike, if I understand your thread, you can not dip the plate
current ( whatever the load setting).  If this is so, you are loaded
too heavy (not enough load capacitanc).  Check and see if you have a
fixed capacitor in shunt with the output load variable capacitor. That
condenser could be open. With good tubes, properly tuned and loaded
into a load, you should be able to see at least 1000 watts output.  In
ssb mode voice PEAKS should be around 300 - 400 ma.
73, Jesse, W6KKT




From [e-mail] Wed Dec 11 20:09:15 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!node2.frontiernet.net!news.sprintlink.net!news-pull.sprintlink.net!news.sprintlink.net!news-atl-21.sprintlink.net!news.voicenet.com!news
From: [e-mail] (Roger Stevens)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Dentrol Clipperton L Amp - too much current! ?
Date: 9 Dec 1996 21:25:39 GMT
Organization: Stevens Associates
Lines: 46
Message-ID: <58i04j$[e-mail]>
References: <58ffsl$[e-mail]>
NNTP-Posting-Host: consh39-pri.voicenet.com
Mime-Version: 1.0
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What, no book?

I don't know what your concern is about the arbitrary 1 amp current limit, as
for example, my SB-200 (with brandy new Svetlana finals), which uses two
572-B's at about 2150 vdc fully loaded, draws maybe 575 mA at maximum output.

So I would expect a quad to draw twice that.  If you are unloading the final t
o
stay under this 1 amp limit, you may tend to increase the chance of arcing,
rather than eliminate it.  I would just tune for maximum output, at the rated
grid current limit for the four tubes, then over-couple a bit, and go.  Amps,
schmamps, I say.  But I would probably do it all at the HV setting, rather tha
n
at LV and then flipping the switch.  Not good.

Then again, I could be full of crap, or more likely, partially full of crap.

Like that Clipperton?  Does it have tuned input?  How can you tell (another
discussion I'm having)?

73, Roger WA3FLE
Norristown, PA

In article <58ffsl$[e-mail]>, [e-mail] says...
>
>Hello all: Please help.  I just purchased a Dentron Clipperton Amp,
>with 4 - 572B tubes.  The amp seems to require a lot of plate current
>to get going.  That is, with 40 watts drive, I get 700 watts out, with
>1 Amp plate current being drawn.  The high voltage is about 1500
>volts.  Pretty bad efficiency at about 47%.  If I push it harder, plate
>current goes beyond 1 amp, and arcing begins (arced once anyway).
>This is in "low" power mode, 1500 volts, if I kick it to high power or
>about 2200 volts, I can get almost 1000watts out, but with 2200watts
>in.  I cannot drive it harder that say 50 watts or so without plate current
>going beyond 1 amp input.  I can't even back it off with the load or
>tune.  Is this normal for this amp?  Will I blow it if I run it at 1 amp
>plate current in?
>
>Thanks in advance, 73 all, Mike... - WQ0N  - email: [e-mail]

--
-----------------------------------------------------
Roger W. Stevens ([e-mail])
amprnet: [e-mail] [44.80.12.33]
ax25: WA3FLE@WB3JOE.#EPA.PA.USA.NA
"Be a Hero--Be a Donor!"--Mickey Mantle
Visit my homepage at http://www.voicenet.com/~rstevens
-----------------------------------------------------



From [e-mail] Wed Dec 11 20:09:17 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!howland.erols.net!ais.net!noc.van.hookup.net!news.bctel.net![e-mail]
From: "Erik Skovgaard" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: DGPS - I want to build a DGPS receiver
Date: 8 Dec 1996 02:24:55 GMT
Organization: m/v Dorothy B, Vancouver
Lines: 22
Message-ID: <01bbe4b0$0a8843a0$5ac56cce@default>
References: <[e-mail]>
NNTP-Posting-Host: vanc01m02-90.bctel.ca
X-Newsreader: Microsoft Internet News 4.70.1155

Doug,

I think the DGPS beacons operate on different frequencies around the world.
 Here on the Canadian West coast, we use the navigation beacons in the 300
KHz-range.  So, you can use any HF receiver that covers that band
(modulation is AM, as far as I recall), but you will also need a decoder to
make sense of the signal.

Alas, I can't help you with info on the decoder, but you could try VE7CEI's
GPS pages.  The URL is:

ftp://sundae.triumf.ca/pub/peter/index.html

73 de VE7MDL

Doug Potter <[e-mail]> wrote in article
<[e-mail]>...
> I want to build rather than buy a DGPS receiver.  Can anyone refer me to
> plans for such a receiver.
>
> Doug Potter
>


From [e-mail] Wed Dec 11 20:09:17 1996
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From: Doug Potter <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: DGPS - I want to build a DGPS receiver
Date: Sat, 07 Dec 1996 19:02:32 -0500
Organization: AT&T WorldNet Services
Lines: 4
Message-ID: <[e-mail]>
NNTP-Posting-Host: 207.147.61.118
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X-Mailer: Mozilla 2.02E (Win95; U)

I want to build rather than buy a DGPS receiver.  Can anyone refer me to
plans for such a receiver.

Doug Potter


From [e-mail] Wed Dec 11 20:09:18 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!arclight.uoregon.edu!enews.sgi.com!news.sgi.com!su-news-hub1.bbnplanet.com!news.bbnplanet.com!cpk-news-hub1.bbnplanet.com!news.mindspring.com!mindspring!cssun.mathcs.emory.edu!metro.atlanta.com!news.he.net!calweb!news.campus.mci.net!news.telis.org!usenet
From: "K.R.Burtchaell" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Direct PC receiver
Date: Fri, 06 Dec 1996 15:50:17 -0800
Organization: KENTRON
Lines: 11
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: s23-pm02.sierra.campus.mci.net
Mime-Version: 1.0
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To: Jan Servaites <[e-mail]>

Jan Servaites wrote:
>
> Does anyone know about the engineering behind the Direct PC (Ku, digital)
> high speed internet, satellite receiver?? I would like to try homebrewing
> a TVRO dish and a PC interface card to receive high speed data. Thanks
> for any help... Jan Servaites  N8CBX
> Are there anyone interested in doing this?? Maybe we can get someting
> going...
> --
> ۥ-
Check out the Hewlett-Packard HPMR-1001/1002 ICs  73 Ken


From [e-mail] Wed Dec 11 20:09:19 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: DXER.COM Ham Radio Resource Site
Date: Thu, 05 Dec 1996 05:42:34 GMT
Organization: A customer of Pacific Bell Internet Services
Lines: 12
Message-ID: <[e-mail]>
NNTP-Posting-Host: ppp-206-170-220-48.anhm01.pacbell.net
X-Newsreader: Forte Free Agent 1.1/32.230

Stop by and check out - http://www.dxer.com
A new amateur radio website, with a on line BBS,
links to DX Clubs, Contest Clubs, On line Magazines,
Packet Clusters, 6 meter links, Maritime, Scanners,
Radio Mods,  VHF/HF Packet Cluster and more.

DXER.COM offers unique e-mail and webspace for personal
pages and more..

CHECK IT OUT

"http://www.dxer.com"


From [e-mail] Wed Dec 11 20:09:20 1996
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!zombie.ncsc.mil!admaix.sunydutchess.edu!news.acsu.buffalo.edu!dsinc!spool.mu.edu!howland.erols.net!newsfeed.internetmci.com!in3.uu.net!199.0.65.182!news-in.tiac.net!posterchild![e-mail]
From: "Dave" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Elec Workbench
Date: 4 Dec 1996 22:20:25 GMT
Organization: The Internet Access Company, Inc.
Lines: 11
Message-ID: <01bbe231$5e23cce0$2ded77ce@ka1wgn>
NNTP-Posting-Host: p12.gw1.athol.ma.tiac.com
X-Newsreader: Microsoft Internet News 4.70.1155


        Can someone tell me where to find
        Electronic Workbench v3.0c For Win.
        Any info. would help

        Thanks
                Dave,N1IQO

                [e-mail]




From [e-mail] Wed Dec 11 20:09:21 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!news.indy.net!news-out.internetmci.com!newsfeed.internetmci.com!newsbuffer.myriad.net!news.fibr.net!www.nntp.primenet.com!nntp.primenet.com!news.nap.net!interaccess!usenet
From: Robert Mansfield <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Elec Workbench
Date: Wed, 04 Dec 1996 23:24:34 -0600
Organization: InterAccess, Chicago's best Internet Service Provider
Lines: 16
Message-ID: <[e-mail]>
References: <01bbe231$5e23cce0$2ded77ce@ka1wgn>
Reply-To: [e-mail]
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Mime-Version: 1.0
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To: Dave <[e-mail]>

Dave wrote:

         Can someone tell me where to find
         Electronic Workbench v3.0c For Win.
         Any info. would help

         Thanks
                 Dave,N1IQO

                 [e-mail]

they have a web page at http://www.interactiv.com/ that you can order
from but there
up to v5 now.

Bob Mansfield WA8USR


From [e-mail] Wed Dec 11 20:09:22 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!news.clark.net!mr.net!www.nntp.primenet.com!nntp.primenet.com!dciteleport.com!worldnet.att.net!newsadm
From: Michael Wallace <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Elec Workbench
Date: Mon, 09 Dec 1996 02:01:25 -0600
Organization: AT&T WorldNet Services
Lines: 22
Message-ID: <[e-mail]>
References: <01bbe231$5e23cce0$2ded77ce@ka1wgn>
Reply-To: [e-mail]
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Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.0Gold (Win95; I)

Dave wrote:
>
>         Can someone tell me where to find
>         Electronic Workbench v3.0c For Win.
>         Any info. would help
>
>         Thanks
>                 Dave,N1IQO
>
>                 [e-mail]

I see from the version nr. you requested, that you must want an older
release.  I don't have that info but I can provide you with a number to
the company in case you don't have it.  Maybe they can be of some
assistance.

Interactive Image Technologies Ltd.
1-800-263-5552

Michael
N3LFH
[e-mail]


From [e-mail] Wed Dec 11 20:09:23 1996
Path: news1.epix.net!news3.epix.net!uunet!in3.uu.net!206.229.87.25!news.sprintlink.net!news-peer.sprintlink.net!howland.erols.net!newspump.sol.net!posts.execpc.com!usenet
From: Chuck Hallett <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Electronic Kits, PLL&DDS
Date: Wed, 04 Dec 1996 08:50:25 -0600
Organization: Exec-PC BBS Internet - Milwaukee, WI
Lines: 22
Message-ID: <[e-mail]>
References: <57oian$[e-mail]>
NNTP-Posting-Host: pm42-07.execpc.com
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.0Gold (Win95; I)

[e-mail] wrote:
>
> Greetings, electronics fans....
>
> If you are interested in building some "kits" from artwork, schematics
> and etc., then take a look at the (two) "kits" I have placed for
> download on a web page.
>
> At this time, the kits are:
>
> A  Direct Digital Synthesizer, which operates up to 20Mhz, and is
> controlled by LPT1 on your PC.
>
> A   Phase Locked Loop circuit, using the MC145106
> and MC1648 PLL IC's. It can operate to 225 Mhz.
>
> A shareware program for printing HPG files to a laser printer.
>
> The web page is:  www.cyberramp.net/~bspeed/
>
> .....Bryan
http://www.cyberramp.net/~bspeed/


From [e-mail] Wed Dec 11 20:09:24 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!news.kei.com!newsfeed.internetmci.com!news-out.microserve.net!news-in.microserve.net!not-for-mail
From: [e-mail] (Steven Kerns)
Newsgroups: rec.radio.amateur.homebrew
Subject: Excellent PC Board Software for Windows
Date: 5 Dec 1996 00:48:40 GMT
Organization: Penn Biomedical Support, Inc.
Lines: 35
Distribution: world
Message-ID: <585658$m2o$[e-mail]>
NNTP-Posting-Host: ppp12.talon.net
Mime-Version: 1.0
Content-Type: Text/Plain; charset=US-ASCII
X-Newsreader: WinVN 0.99.7

This is for everyone here that has been looking for
a excellent PC design software package for Windows.

Try the Ivex web site at http://www.ivex.com

We just bought the non-shareware version and it is
only $29.00 from Mouser Electronics but you can
down load a full operational shareware version of the
program from their web site for free.  The only catch
is that it will only plot 100 pin points, but for
Ham use that is plenty.  The $29.00 version will
plot 220 pins and upgrades can be purchased to go
upwards of 900 pins.  The manual is also offered
online, so full documentation is also avaliable,
unlike many other shareware and low buck PCB software
I have tried in the past.

This software is the best I have seen in the under
$1000 price class.  It supports Gerber routing and
has many other features that only the kilo-buck software
have.

It is well worth the half of an hour it takes to
download.

73
Steven Kerns N3FTI
skerns @mail.talon.net
Penn Biomedical Support, Inc.








From [e-mail] Wed Dec 11 20:09:25 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Excellent PC Board Software for Windows
Date: 5 Dec 1996 19:34:41 GMT
Organization: AOL http://www.aol.com
Lines: 9
Message-ID: <[e-mail]>
References: <585658$m2o$[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]
X-Newsreader: AOL Offline Reader

HI Steve

Does this software provide for image reversal to make negatives?

I tried it when it first came out. It was so slow
I didn't get into it very far.


Carl


From [e-mail] Wed Dec 11 20:09:25 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!news.bbnplanet.com!su-news-hub1.bbnplanet.com!news.sgi.com!news-out.microserve.net!news-in.microserve.net!not-for-mail
From: [e-mail] (Steven Kerns)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Excellent PC Board Software for Windows
Date: 7 Dec 1996 19:43:21 GMT
Organization: Penn Biomedical Support, Inc.
Lines: 21
Distribution: world
Message-ID: <58chcp$e85$[e-mail]>
References: <585658$m2o$[e-mail]> <[e-mail]>
NNTP-Posting-Host: ppp13.talon.net
Mime-Version: 1.0
Content-Type: Text/Plain; charset=US-ASCII
X-Newsreader: WinVN 0.99.7

In article <[e-mail]>, [e-mail]
says...
>
>HI Steve
>
>Does this software provide for image reversal to make negatives?
>
>I tried it when it first came out. It was so slow
>I didn't get into it very far.
>
>
>Carl

Not sure if it does reversals Carl, we outsource our boards so
I have not looked into doing negatives.  Running the latest version
on my P5-75 it is very fast, but then again I am not designing 200+
pin boards.

73 Steve N3FTI




From [e-mail] Wed Dec 11 20:09:26 1996
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From: Jerry Campbell <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: F.S. Microwave Tx/Rx
Date: Wed, 04 Dec 1996 23:55:57 -0800
Organization: home
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For Sale:  Racom Model 5005E microwave link. One transmitter and one
receiver. Operating freq. 23.125. Units are in good working condition.
Asking $2500 for both. Anything else I can add drop me a line.


From [e-mail] Wed Dec 11 20:09:27 1996
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From: [e-mail] (Bill Nelson)
Newsgroups: rec.antiques.radio+phono,rec.radio.swap,rec.radio.amateur.homebrew
Subject: Re: F.S.- 15,000 + tubes antique to modern
Followup-To: rec.antiques.radio+phono,rec.radio.swap,rec.radio.amateur.homebrew
Date: 8 Dec 1996 22:12:42 GMT
Organization: Public Electronic Access to Knowledge,Corvallis,US
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MURRAY PASTERNACK ([e-mail]) wrote:
: For Sale: Tubes, 1920's to 1970's, NOS & USED, 40 year accumulation of
: more then 15,000 tubes.

: E-mail your snail mail address to: [e-mail] for a list of
: types available & prices

I tried sending you e-mail, but had the posting rejected - your address
was not acceptable.

I would like the list.

Bill


From [e-mail] Wed Dec 11 20:09:28 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Frequency Counter & SWR Meter
Date: Mon, 02 Dec 1996 22:25:49 GMT
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I need plans for a frequency counter and a 2 meter SWR meter.

Thanks,
Scott, KF6FCN
[e-mail]



From [e-mail] Wed Dec 11 20:09:29 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: FS Vac. Var. & roller induc
Date: Tue, 03 Dec 1996 17:34:50 -0500
Organization: University at Buffalo
Lines: 10
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I have a 1000pf vacuum variable capacitor

and a roller inductor.   Both are motor driven and include mounting
hardware. will run off of 12 - 28vdc.
great condition.
Good for Amp project or tuner.

Offer?

Jim N2GO


From [e-mail] Wed Dec 11 20:09:30 1996
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From: [e-mail] (John Goller)
Newsgroups: rec.radio.amateur.homebrew
Subject: FS:  Eimac 4cx1000 + Eimac socket
Date: 7 Dec 1996 10:46:28 GMT
Organization: Concentric Internet Services
Lines: 4
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tested full output 4cx1000 eimac tube and eimac socket....also have
filament transformer for the above tube...local SK had started to
build an amp but never finished it....$250 obo  de John K9UWA



From [e-mail] Wed Dec 11 20:09:31 1996
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From: [e-mail] (Dale Allen)
Newsgroups: rec.radio.amateur.homebrew
Subject: FS: Boonton 190-A Q Meter
Date: Mon, 09 Dec 96 18:22:45 GMT
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If you are winding your own coils, you cannot afford to be without
this classic piece of test equipment. It measures inductor Q from
5-1200 over a frequency range of 20-260Mhz. The resonating
capacitance is 7.5-100pf. This is a working unit in cosmetically
good condition and the original manual is included. I'll take the
best offer over $75. Bids accepted only from within the 48 states.
Buyer to pay Mail Box Center packing and shipping charges from
Northern VA (20170).
                                                Regards,
                                                        Dale


From [e-mail] Wed Dec 11 20:09:31 1996
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From: [e-mail] (Phil Clements)
Newsgroups: rec.radio.amateur.homebrew
Subject: FS: Eimac 8877 Tubes; NIB
Date: 4 Dec 1996 04:07:29 GMT
Organization: Your Organization
Lines: 3
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Unused and guaranteed Eimac 8877 tubes. $515 ea. shipped CONUS.

Phil, K5PC


From [e-mail] Wed Dec 11 20:09:32 1996
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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
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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 20:09:33 1996
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From: [e-mail] (bradly)
Newsgroups: rec.radio.amateur.homebrew
Subject: FS: Realistic HTX-202
Date: 8 Dec 1996 23:04:31 GMT
Organization: Your Organization
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4 SALE:

Realistic HTX-202 2 meter handheld.

Excellent condition. $200.00 and i will pay shipping.

call me at 561-791-0137 or e-mail me [e-mail]. Im located in
south florida.




From [e-mail] Wed Dec 11 20:09:34 1996
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From: [e-mail] (Clint Bradford)
Newsgroups: rec.radio.amateur.homebrew
Subject: RE: FS: Realistic HTX-202
Date: Mon,  9 Dec 1996 07:01:00 GMT
Message-ID: <[e-mail]>
Organization: ATTENTION to Details BBS - Mira Loma, CA
Distribution: world
References: <58fhhv$[e-mail]>
Lines: 8


>>Realistic HTX-202 2 meter handheld.
>>Excellent condition. $200.00 and i will pay shipping.

Hmmm...buy your USED one for $200.00 sight unseen...or buy a BRAND NEW
ONE WITH WARRANTY for $179.95 from my local Radio Shack dealer.

I'll let you know when I make up mu mind.


From [e-mail] Wed Dec 11 20:09:35 1996
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From: [e-mail] (bradly)
Newsgroups: rec.radio.amateur.homebrew
Subject: FS: Realistic PRO-39 Scanner.
Date: 8 Dec 1996 23:06:08 GMT
Organization: Your Organization
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4 sale:

Realistic PRO-39 handheld scanner.

Excellent condition. $200.00 and i will pay shipping.

call me at 561-791-0137 or e-mail me at [e-mail]. Im located in
south florida..




From [e-mail] Wed Dec 11 20:09:37 1996
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From: Richard Valentine <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: FT-1000 Panoramic Display - SIGN UP HERE!!
Date: Wed, 04 Dec 1996 23:03:31 -0500
Organization: NETPLEX Internet Access [phone]
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********** PANORAMIC DISPLAY FOR YAESU FT-1000 ***************

Hello all,  Just spoke to Jerry Vogt from "Hamtronics, Inc".  He said
that if they get 40-50 committed customers they will design a "black
box" that
would connect between the Yaesu FT-1000 and a Kenwood Scope (SM220 w/BS8
or
SM230), for PANORAMIC DISPLAY use!
The FT-1000 comes with the IF OUT jack, and even refers hooking a
bandscope to it in the manual, but they never made one.  The Kenwood
scopes work
excellent and are readily available new and used.  The IF's (8.83 MHz)
don't
match, however.

A circuit is needed to downconvert the FT-1000's  73.62 MHz I.F. to
Kenwood's 8.83 MHz I.F.   HAMTRONICS will provide the necessary mixer
and Xtal controlled oscillator (all in one small shielded box) to do
the work!  This IS rather specific, but it will obviously work with
any other 73.62 IF.  Not sure what the other Yaesu's or the MP has.

**** Please respond either to me (news, and email), or to Jerry Vogt
at the Hamtronics site:   http://www.hamtronics.com/hamxHome.html
Just a brief,  "Count me in, I want one!!"  type of message will do.
If the count is high enough, we're in!  They'll make em'  Tell your
friends!!
It's too early to know the price, but their similar converters are
very affordable.  Thank you all!!   -- Richard Valentine,  N1SQJ


From [e-mail] Wed Dec 11 20:09:38 1996
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From: [e-mail] (R. L. Measures )
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: Mon, 02 Dec 1996 02:40:30 -0700
Organization: Internet Access of Ventura County
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Message-ID: <[e-mail]>
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In article <[e-mail]>, [e-mail]
wrote:

> In article <[e-mail]>,
> [e-mail] (R. L. Measures ) writes:
>
> >Thanks, Tom.  BTW, what is a "physic ability".
> > The reason I had to guess at the 160 figure is because somebody is
> >withholding the actual anode resonant frequency.
> >
> >
>
> Woops, no speel chek. I meant psychic ability, not the ability to give a
> medicine that purges.

Sorry, but I'm still in the dark, Tom.  What is 'psychic'?

> Please explain what we would know (with a grid dip meter measurement)
> other than the reactance crosses zero at that point.
>
I need to find the resonant frequency of a circuit in the mid VHF-range,
whose resonating C is 5pF, but to find it without physicallyconnecting a
measurement device to the circuit under test.  A dipmeter can do it.
Dipmeters are also useful for comparing the Q of two circuits that resonate
at the same frequency.
--------------------------------
e-mail copies to Mr. Rauch et al.

--
--Rich-- ag6k, 805-386-3734


From [e-mail] Wed Dec 11 20:09:39 1996
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From: [e-mail] (R. L. Measures )
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: Mon, 02 Dec 1996 03:13:39 -0700
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In article <[e-mail]>, [e-mail]
wrote:

> In article <[e-mail]>,
> [e-mail] (R. L. Measures ) writes:
>
> >> The point remains what can you possibly do with a grid dip meter Rich?
> >
> >I'm trying, I'm trying, but the guy with the AL-80 keeps stalling and
> >stalling, and nothing happens.  The nice thing about a dipmeter is that
> it
> >does not require a physical connection to the circuit under test--as is
> the
> >case with other types of test equipment.
>
> I guess you are not familiar with modern test equipment Rich.

I guess not.  I was under the impression that they had to be connected to
the circuit under test.

> The anode circuit of the AL-80B I just measured has two resonances (other
> than the ones normally due to HF tank components). One is adjustable over
> a range of 63.34 to 22.63 MHz as the plate tuning cap is adjusted. It
> moves down in frequency as the capacitor is meshed.
>
> The second resonance is at 152.10 - 161.36 MHz. It moves UP in frequency
> as the capacitor is meshed.

No help.  The frequency sounds in the ballpark, however, this resonance
moves DOWN slightly as the tune capacitor is meshed, not UP.

> With the suppressor removed this resonance moves up to 192.16 MHz.
>
> What can you develop from this data? ....snip...

 What I am attempting to calculate is how the VHF current distributes in
the suppressor example YOU gave me (85nH/100 ohms).  If you (Ameritron) are
really one of the "recognized amplifier experts", you should have nothing
to fear.

Tom:  I never saw an answer to the question Jesse asked you:

"Tom, are you absolutely sure it's impossible for a unstable amplifier
to start into  oscillation intermittently from switching transcients?
73, Jesse, W6KKT"
---------------------------------------
e-mail copies to Tom Rauch, Jesse et al.

--
--Rich-- ag6k, 805-386-3734


From [e-mail] Wed Dec 11 20:09:40 1996
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From: [e-mail] (R. L. Measures )
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: Mon, 02 Dec 1996 09:08:48 -0700
Organization: Internet Access of Ventura County
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Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
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In article <[e-mail]>, [e-mail]
wrote:

> Hi Rich,
>
> Im think we should finish one thing before starting something else.
>
> In article <[e-mail]>,
> [e-mail] (R. L. Measures ) writes:
>
> >No help.  The frequency sounds in the ballpark, however, this resonance
> >moves DOWN slightly as the tune capacitor is meshed, not UP.
>
> No, the VHF resonance moves UP slightly as the capacitor is meshed. If you
> know all the answers, why do you bother asking questions?

Who told you that I know all the answers?  Apparently you haven't read  the
copy of the Rebuttal I mailed to you.  .

> > What I am attempting to calculate is how the VHF current distributes in
> >the suppressor example YOU gave me (85nH/100 ohms).  If you (Ameritron)
> are
> >really one of the "recognized amplifier experts", you should have nothing
> >to fear.
>
> Fear? What has that got to do with parasitics? Does the tube get so afraid
> it shakes?
>
> 73 Tom
---
Hello, Tom:
If you believe that you can prove me wrong, then you should not be afraid
to take your dipper and measure the dip-freq.  at the AL-80's DC blocking
capacitor.  The anode resonant frequency is highest when the tuning cap. is
at minimum C.  The anode resonant frequency is slightly lower when the
tuning cap. is at maximum C.  Knowing both frequencies would be helpful.

How are you coming on the Q problems, Tom?  That second Q problem is a bit
tricky.  Would you prefer to let me post the answers first, or would you
prefer that we simultaneously post the answers at 00:00 hours GMT, or
what???    We need to start digging into the Q issue that you brought up,
Tom.

Tom:  Does the AL-1500 amplifier, which you designed, utilize a VHF
suppressor?

 Did you answer the question that Jesse asked you:

"Tom, are you absolutely sure it's impossible for a unstable amplifier
to start into  oscillation intermittently from switching transcients?"
---73, Jesse, W6KKT
 This seems like a fair question, Tom.  Roughly 95% of the parasitic
oscillations that I hear about occur when transient currents are present in
the anode circuit. .
===============================
e-mail copies to Mr. Rauch, et al.

--
--Rich-- ag6k, 805-386-3734


From [e-mail] Wed Dec 11 20:09:41 1996
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From: [e-mail] (R. L. Measures )
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: Wed, 04 Dec 1996 07:11:49 -0700
Organization: Internet Access of Ventura County
Lines: 55
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
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In article <[e-mail]>, [e-mail]
wrote:

> hi Rich,
>
> I've been trying to answer your questions, even though you seem to avoid
> the ones I ask.

HI, Tom-------Here is the way I try to operate in a debate:  When I read a
reply, at the first statement I come to that does not appear to wash, I
stop reading, and I deal with it.  If time and space permit, I continue
reading until I come to another item that does not appear to wash, and I
deal with that.  I know that if I do not do this, the debate can become
diffused and turn into a quagmire.

> In article <[e-mail]>,
> [e-mail] (R. L. Measures ) writes:
>
> >Hello, Tom:
> >snip... The anode resonant frequency is highest when the tuning cap.
> is at minimum C.  The anode resonant frequency is slightly lower when the
> >tuning cap. is at maximum C.  Knowing both frequencies would be helpful.
>
> No, that's incorrect. The lower anode resonant frequency follows the
> capacitor in the normal manner, but the higher resonant frequency varies
> exactly as I posted.

Exactly?  Incorrect?  I take "meshed" to mean that the tune cap. is at
maximum C.  Since the tune C is effectively in series (through the chassis
connection) with the anode's C of 5pF, the net C of the two caps. should be
maximum when the tune C is at maximum.  The net C should be at minimum when
the tune C is at minimum, or unmeshed.  Since the net C is
parallel-resonant with the anode circuit's total L. (see
<http://www.vcnet.com/measures/D.a.13.GIF>),  therefore, Mr. Rauch's
statement (that the resonance moves up in frequency when the tune capacitor
is meshed) sounds backwards.......
  I will proceed using Tom's figure of 161MHz in the calculation. //  The
problem is: how does the (161MHz) current divide in a paralleled 85nH Ls
and a 100ohm Rs in the AL-80B?......... Using XL=2*Pi*f*L ohms, the
reactance of the 85nH Ls = 86 ohms.  Applying 1Vrms to the paralleled Rs
and Ls, the current throuh Rs is 1 volt divided by 100 ohms=10mA,
and the current through the Ls is 1 volt divided by 86 ohms=11.6mA.

 Tom Rauch said:  "The coil's reactance increases with frequency, and at
VHF most of the signal path is through the resistor. It is plainly evident
that the dominant component at VHF is the resistor, not the coil."

Tom: do you presently stand by this statement?

Tom:  are you prepared to discuss Q?
------------------------------
e-mail copies to Mr. Rauch, et al.

--
--Rich-- ag6k, 805-386-3734


From [e-mail] Wed Dec 11 20:09:42 1996
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From: "Tom C. Brown, Jr." <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: Tue, 03 Dec 1996 23:35:51 -0600
Organization: TECLink Internet Services: [e-mail]
Lines: 22
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
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[e-mail] wrote:

[Partial]
> I'm still wondering what you can predict with a GD meter.
>

You can get a pretty good idea of where (frequency wise) the thing might
oscillate.  Or at least where it might ring.

I thought Rich's purpose for the GDO measurements was quite obvious.

What do YOU usually use a grid dip oscillator for?  It's a really great
tool for finding resonances.  And, as you and I both know, if a circuit
is going to break into oscillation, it is liable to do it at (you
guessed it!) the frequency of resonance.  And, since we are talking
about parasitic *oscillations* here (among other things), I'd say that
makes Rich's GDO measurements pretty significant.

I would have thought that a "recognized amplifier expert" would have
seen this right away......

73, Tom KJ5IE


From [e-mail] Wed Dec 11 20:09:43 1996
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From: "Will, KN6DV" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Good source for amplifier tips
Date: 5 Dec 1996 04:07:54 GMT
Organization: KN6DV
Lines: 16
Message-ID: <01bbe261$ed59a1c0$[e-mail]>
NNTP-Posting-Host: lanc00-05.ca.qnet.com
X-Newsreader: Microsoft Internet News 4.70.1155

For the interesting party's again.
I have uploaded PART 8 of the on going discussion.
It is still interesting and also educational (for me).
Also you will find the letter from Eimac( to AG6K here) and a few other
links to amplifier related web pages.
Hope to be a help.
Thanks 73 Will,  KN6DV
--
http://www.av.qnet.com/~kn6dv

REFORM
Unless the reformer can invent something which substisutes attractive
virtues for atractive vices, he will fail.
(Walter Lippmann)

[e-mail]


From [e-mail] Wed Dec 11 20:09:44 1996
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From: "Tom C. Brown, Jr." <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: Thu, 05 Dec 1996 11:09:11 -0600
Organization: Madison Materials Company
Lines: 23
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CC: [e-mail]

[e-mail] wrote:
>
> hi Rich,
>
> I've been trying to answer your questions, even though you seem to avoid
> the ones I ask.
>

You mean like the way you have avoided questions like (1) Who is Mr. XXX
at Eimac? and (2) Who are all those folks at Eimac who agree with you on
the parasitics issue?

I know you are sick of hearing those questions asked, Tom, but don't
forget, YOU brought both issues up in this thread.  I didn't.  Rich
didn't.  We just asked for real information once YOU brought it all up.
And as soon as we asked for real, verifiable information, you dropped
the subject and have pleaded with us to do the same.

Actually, in my opinion, your (1) inability (or flat refusal) to answer
either question, and (2) your intense desire to drop both subjects *IS*
an answer to both questions.  Quite a revealing answer, I would say.

73, Tom KJ5IE


From [e-mail] Wed Dec 11 20:09:45 1996
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From: [e-mail] (R. L. Measures )
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: Thu, 05 Dec 1996 09:20:30 -0700
Organization: Internet Access of Ventura County
Lines: 43
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
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In article <[e-mail]>, [e-mail]
wrote:

> In article <[e-mail]>,
> [e-mail] (R. L. Measures ) writes:
snip...
> therefore, Mr. Rauch's
> >statement (that the resonance moves up in frequency when the tune
> capacitor
> >is meshed) sounds backwards......
>
> You only think that because you have no idea what the plate tuning
> capacitor looks like, impedance wise, at frequencies above 150 MHz. I
> expect that, since you do not have access to more elaborate test
> equipment.
>
Dipmeters find resonances, Mr. Rauch.

...snip...

> ......... Using XL=2*Pi*f*L ohms, the
> >reactance of the 85nH Ls = 86 ohms.  Applying 1Vrms to the paralleled Rs
> >and Ls, the current throuh Rs is 1 volt divided by 100 ohms=10mA,
> >and the current through the Ls is 1 volt divided by 86 ohms=11.6mA.

Oops.  It looks like Mr. Rauch's statement that insignificant current flows
in Ls is in deep feces---so here it comes........

> That is for an inductior of infinite Q, and neglects stray coupling and
> capaciatance. The AROUND (remember I plainly indicated  ~85 nH) 85 nH
> inductor, actually......snip..........
> This calculation is a wasted exercise.........
....snip,,,,,,,,,,,on and on. ........Cough, cough.  Bzzzzzzzzzzzt  At this
rate my smoke detector is going to need a new battery by December.

Mr. Rauch proposed that I calculate the currents for an Ls of 85nH, a
parallel Rs of 100 ohms, at a frequency of 161MHz.  I complied.  Now it
seems that the apparently correct answers are NOT correct.
--------------------------------------
e-mail copies to Mr. Rauch, et al.

--
--Rich-- ag6k, 805-386-3734


From [e-mail] Wed Dec 11 20:09:46 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: 6 Dec 1996 23:02:35 GMT
Organization: AOL http://www.aol.com
Lines: 22
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

Tom States: "In my opinion, a GDO with no physical connnection, and with
care not to over couple the GDO into the circuit, is one of the least
invasive ways
to measure the resonant frequency of the circuit IN THIS CASE."

I may be stepping into something that is out of my league, but it seems to
me that the "physical connection" argument smacks of religeous fantasy.
There was a time when virtually all significant RF coupling was done
inductively--and even today's most advanced solid state power amplifiers
transfer huge amounts of power in this manner.  If I were to connect you
to a powerful 160 MHz source, Tom, would you rather it be through a .5 pF
capacitor with a 10 Meg resistor in series--or through a large inductive
link with a high co-efficient of coupling. Your choice!

The fact is, with a grid dipper, I don't think I'd have a clue how tightly
I am coupling to the DUT--save by assessing the shapness of the dip
itself.  And, any time the GDO is seeing something, it is also loading
something--or the indication wouldn't be happening.  I may be stupid, but
I guess I just can't quite grasp where you're coming from!

Rick  K1BQT



From [e-mail] Wed Dec 11 20:09:47 1996
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From: [e-mail] (Wes Stewart)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: Fri, 6 Dec 1996 18:11:48 LOCAL
Organization: Starnet
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In article <[e-mail]> measures@mail.
vcnet.com (R. L. Measures ) writes:
>From: [e-mail] (R. L. Measures )
>Subject: Re: Good source for amplifier tips
>Date: Fri, 06 Dec 1996 10:27:09 -0700



[snip]

>This is a parallel circuit, so most things are inverted.  (Standing on head
>may be useful.)  Instead of calculating reactance (X), as would be the case
>for a series circuit,  we  must instead calculate  susceptance (B).  . In a
>parallel circuit, we graph B (with the + and - signs inverted) and
>conductance (G), (G=1/R), to calculate admittance (Y) instead of graphing R
>and X to calculate impedance (Y).    R is in ohms and G is in siemens.
>(archaic: mhos) .  Using Y=1/Z and Z=1/Y, we can convert a parallel circuit
>to a series equivalent circuit, or we can convert a series circuit to a
>parallel equivalent circuit.


> In order to be able to use the formula Q=X/R, we must first convert the
>parallel 70nH/50 ohm circuit (Y) to an equivalent series circuit (Z) by
>using Z=1/Y.  To do this, most everything inverts.  BL @100MHz, is
>-1/(2*Pi*100^6 Hz*70^-9 H) = -22.7 milli-siemens.  The G of the 50 ohm R is
>1/50 = 20 milli-siemens.




>  To graph this, the -22.7 milli-siemen BL vector heads down and the 10
>milli-siemen G vector heads to the right.  The resulting vector forms a
>right triangle whose tangent is -22.7/10 = -2.27, = -66.22 degrees.  The
>hypotenuse, Y,  can be solved with the square root of the sum of the
>squares. Thus, Y = 24.8 siemens@-66.22 degrees
> Using Z=1/Y, , we convert this to an equivalent series circuit whose Z
>vector can be resolved into its X and R components---the very things we
>need to solve Q=X/R.  Solving for Z = 1/(24.8 millisiemens @-66.22
>degrees), Z = 40.3 ohms @+66.22 degrees.  The X vector is sin 66.22 degrees
>(0.915) * 40.3 ohms = 36.9 ohms.  The R vector is cos 66.22 degrees (0.403)
>* 40.3 ohms = 16.2 ohms.


[more snipping to make my newsreader happy]






Whew!

Why not just use Q=R/X for the parallel case?

73, Wes N7WS


From [e-mail] Wed Dec 11 20:09:48 1996
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From: [e-mail] (R. L. Measures )
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: Sat, 07 Dec 1996 13:51:34 -0700
Organization: Internet Access of Ventura County
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In article <[e-mail]>, [e-mail] (Wes
Stewart) wrote:

snip...

> First, compute the parallel equivalent of the series RL alone.
> Then add the parallel resistance using the usual formula for such things.
> This gives the new parallel equivalent R||L.  Q is computed as above.
>
 Good thinking, Wes.

--
--Rich-- ag6k, 805-386-3734


From [e-mail] Wed Dec 11 20:09:50 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: 7 Dec 1996 04:32:06 GMT
Organization: AOL http://www.aol.com
Lines: 35
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References: <[e-mail]>
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Hi Richard,

Instead of more RM style personal attacks and non-technical comments about
the other Richard we all know of, I'd like to see you answer questions
about Q.

I think your parasitic theories are absolutely wrong. VHF Q does NOT
change significantly with the addition of nichrome, and that is a fact you
are trying to avoid. As a matter of fact, a small adjustment in the
suppressor resistance and inductance makes a larger change than the
addition of "nichrome".

You realize if the nichrome in the suppressor's winding of wire does not
significantly lower VHF Q, then everything you attribute to VHF
oscillation must be a product of vivid imaginations, or directly
attributed to MY claim that HF Q and mistuning / overdriving are the major
causes of arcs and sparks in the tank.

Let's make an agreement.

If I can not lower Q (using coventional components) the same amount or
more at VHF without adding as much loss of Q on ten meters as the nichrome
does, I will concede you have been hawking something of ### great
technical merit ###. I will endorse your product as a good method of
parasitic suppression.

If the system you hawk does NOT significantly reduce VHF Q at or near the
frequency of oscillation (let's say between 140 and 200 MHz) compared to
what I can do with conventional components, will you admit the VHF
parasitic cures and theories you have been making are false?

This sounds fair to me, since you claim to have re-discovered the only
cure for VHF parasitics.

73 Tom


From [e-mail] Wed Dec 11 20:09:51 1996
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From: [e-mail] (R. L. Measures )
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: Sat, 07 Dec 1996 08:54:48 -0700
Organization: Internet Access of Ventura County
Lines: 33
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]> <[e-mail]> <[e-mail]>
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In article <[e-mail]>, [e-mail] (Wes
Stewart) wrote:

> In article <[e-mail]>
[e-mail] (R. L. Measures ) writes:
> >From: [e-mail] (R. L. Measures )
> >Subject: Re: Good source for amplifier tips
> >Date: Fri, 06 Dec 1996 10:27:09 -0700
>
>
>
> [snip]
>
> >This is a parallel circuit, so most things are inverted.  (Standing on head
> >may be useful.)  snip....

> Whew!
>
> Why not just use Q=R/X for the parallel case?
>
> 73, Wes N7WS

Whew is right, Wes.  Thanks for the heads up.  Sorry.  I forgot that for a
parallel circuit, the formula is Q=R/X.  So how do we figure total Q when
the parallel Ls contains series R of its own?

 I'm still trying to figure out why Tom Rauch cancelled his post of 28
November.
-----------------------------------------------
e-mail copies to Mr. Stewart, Mr. Rauch, et al.

--
--Rich-- ag6k, 805-386-3734


From [e-mail] Wed Dec 11 20:09:52 1996
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From: [e-mail] (Wes Stewart)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: Sat, 7 Dec 1996 10:20:03 LOCAL
Organization: Starnet
Lines: 37
Message-ID: <[e-mail]>
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In article <[e-mail]> measures@mail.
vcnet.com (R. L. Measures ) writes:
>From: [e-mail] (R. L. Measures )
>Subject: Re: Good source for amplifier tips
>Date: Sat, 07 Dec 1996 08:54:48 -0700

>In article <[e-mail]>, [e-mail] (Wes
>Stewart) wrote:

>> In article <[e-mail]>
>[e-mail] (R. L. Measures ) writes:
>> >From: [e-mail] (R. L. Measures )
>> >Subject: Re: Good source for amplifier tips
>> >Date: Fri, 06 Dec 1996 10:27:09 -0700
>>
>>
>>
>> [snip]
>>
>> >This is a parallel circuit, so most things are inverted.  (Standing on hea
d
>> >may be useful.)  snip....

>> Whew!
>>
>> Why not just use Q=R/X for the parallel case?
>>
>> 73, Wes N7WS

>Whew is right, Wes.  Thanks for the heads up.  Sorry.  I forgot that for a
>parallel circuit, the formula is Q=R/X.  So how do we figure total Q when
>the parallel Ls contains series R of its own?

First, compute the parallel equivalent of the series RL alone.
Then add the parallel resistance using the usual formula for such things.
This gives the new parallel equivalent R||L.  Q is computed as above.


N7WS


From [e-mail] Wed Dec 11 20:09:54 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: 7 Dec 1996 19:20:07 GMT
Organization: AOL http://www.aol.com
Lines: 52
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References: <[e-mail]>
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X-Admin: [e-mail]
X-Newsreader: AOL Offline Reader

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

>
>I may be stepping into something that is out of my league, but it seems
to
>me that the "physical connection" argument smacks of religeous fantasy.
>There was a time when virtually all significant RF coupling was done
>inductively--and even today's most advanced solid state power amplifiers
>transfer huge amounts of power in this manner.  If I were to connect you
>to a powerful 160 MHz source, Tom, would you rather it be through a .5 pF
>capacitor with a 10 Meg resistor in series--or through a large inductive
>link with a high co-efficient of coupling. Your choice!

This is another area where Mr. Brown and Measures obviously do NOT
understand what they are doing.

The very requiremnt that current is removed from the oscillator, causing a
dip, indicates coupling is VERY high! The oscillator coil in the dip meter
has such high resonant currents that it has a very intense field.

The coupling is so high it actually robs the oscillator of current, cause
a dip to appear on the indicator.

I can measure the field from my GDO almost ten feet away with the probe of
my network analyzer, yet the GDO has "no idea" the NA probe is there!

It's kind of like the difference between using GPS or a compass, isn't it?

Rich, you allude I adjust the resistance "to what I want". That statement
is idotic when we look at the facts.

You couple a GDO to a cold tube that appears as only reactances, when in
operation each element has a very finite resistance. For example, negative
feedback and other effects combine to make the cathode have a low
resistive part in it's terminal impedance and alos greatly reduce the
anodes resistive component (at idle it can be taken as Ep/Ip, although it
varies over the plate current cycle).

I use the mean impedance of the element while the tube is conducting as
the test resistance, while you use an open circuit. Your test is fine if
you never power the tube up. When you adjust the tank components, do you
terminate the anode in a resistance equal to the operating resistance
given in a Chaffe analysis, or do you just leave the anode hang loose?

I find it remarkable you always seem to find fault with correct
proceedures while using the worse methods possible in your tests.

What about Q, how much change does you nichrome make at VHF? Is it a large
cahnge, or insignificant?

73 Tom


From [e-mail] Wed Dec 11 20:09:56 1996
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From: [e-mail] (R.L. Measures )
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: Sun, 08 Dec 1996 00:24:01 -0700
Organization: WestNet
Lines: 58
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References: <[e-mail]> <[e-mail]>
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> Hi Richard,
>
> Instead of more RM style personal attacks and non-technical comments about
> the other Richard we all know of, I'd like to see you answer questions
> about Q.

???  //  RE: Q:  On 6 Dec. I answered your Nov. 28 post about Q .

> I think your parasitic theories are absolutely wrong. VHF Q does NOT
> change significantly with the addition of nichrome, and that is a fact you
> are trying to avoid. As a matter of fact, a small adjustment in the
> suppressor resistance and inductance makes a larger change than the
> addition of "nichrome".

Since 1990, I have been aware that you have a different opinion, Tom.
However, you appear to base your opinion on the assumption that
insignificant VHF current flows in the suppressor inductor, Ls.  When
presented with the calculations (from the very problem you proposed) which
showed that similar VHF currents flow in both Rs and Ls, you proffered
unplausible arguments to the contrary.


> You realize if the nichrome in the suppressor's winding of wire does not
> significantly lower VHF Q, then everything you attribute to VHF
> oscillation must be a product of vivid imaginations, or directly
> attributed to MY claim that HF Q and mistuning / overdriving are the major
> causes of arcs and sparks in the tank.

I do not realize that resistance wire (nichrome) has no effect on VHF-Q.  I
have observed that the VHF dip in amplifier anode circuits is rather
different when silver-plated strap suppressor inductors (Ls) are replaced
with a resistance wire Ls.  With silver (and copper), the dip is sharper
and deeper.  With the resistance wire, the dip is broader and shallower.
With roughly equal currents flowing in Ls and Rs, why not?
 This is nothing new, Tom.  Mr. F. E. Handy was aware of this technique 70
years ago..  You can read about it in the 1926 Edition of the *Radio
Amateur's Handbook*.  You can read about it in the 10/88, 9/90, 10/90 and
1/94 issues of *QST* magazine.  There's an article about calculating values
for VHF parasitic-suppressors in the 3/89 issue.

> Let's make an agreement.

I am reluctant to make an agreement with you, Mr. Rauch.

> If I can not lower Q (using coventional components) the same amount or
> more at VHF without adding as much loss of Q on ten meters as the nichrome
> does, I will concede you have been hawking something of ### great
> technical merit ###. I will endorse your product as a good method of
> parasitic suppression.

 An endorsement from someone who dismisses well-established AC circuit
analysis , who purports that dipmeters are incapable of finding resonances,
would amount to an UNendorsement.
--------------------------------
e-mail copies to Mr. Rauch, et al.

--
--Rich-- ag6k, 805-386-3734


From [e-mail] Wed Dec 11 20:09:56 1996
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From: "Tom C. Brown, Jr." <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: Tue, 10 Dec 1996 13:43:14 -0600
Organization: Madison Materials Company
Lines: 10
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To: [e-mail]

Tom,

Concerning the data you have been posting.....  were you measuring this
stuff by connecting your instruments to a commercially made amp, just as
I might buy off the shelf?  Or, were you using a test circuit strictly
designed to determine the operating characteristics of a tube?

Thanks.

Tom KJ5IE


From [e-mail] Wed Dec 11 20:09:58 1996
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From: [e-mail] (R. L. Measures )
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: Tue, 10 Dec 1996 10:15:10 -0800
Organization: Internet Access of Ventura County
Lines: 58
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]> <[e-mail]> <[e-mail]> <[e-mail]> <[e-mail]>
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In article <[e-mail]>, [e-mail] (Wes
Stewart) wrote:
snip.....

> >Whew is right, Wes.  Thanks for the heads up.  Sorry.  I forgot that for a
> >parallel circuit, the formula is Q=R/X.  So how do we figure total Q when
> >the parallel Ls contains series R of its own?
>
> First, compute the parallel equivalent of the series RL alone.
> Then add the parallel resistance using the usual formula for such things.
> This gives the new parallel equivalent R||L.  Q is computed as above.
>
====================================
In Mr. Rauch's post of 28 Nov. he said:

> A second factor enters the equation, and this is the critical area. Adding
nichrome to the primary HF path does almost NOTHING to system Q. I have no
idea what guage wire you use, but let's look at some typical suppressors
when 5 ohms of ESR is added to the inductor  Here are the numbers:

With your suggested values of 70 nH and 50 ohms at 100 MHz.
Q = 1.14 (par equiv values (p eq) are 50r and 70 nH
with 5 ohm esr from nichrome.
Q = 1.0     (p eq) = 44.34r and 70.9 nH

With 70 nH and 100 ohms:
Q = 2.3
with 5 ohm esr nichrome
Q = 1.8    (p eq) = 79.7 r and 70.9 nH

With 150 nH and 50 ohms:
Q = 0.53
with 5 ohms esr nichrome
Q =  .5 (p eq) 48.6r and 150.4 nH
snip
=================================
The First Problem :  (note m.s=milli-siemens)
........for the series of 70nH L and 5 ohms of R, at 100MHz, I calculated
that XL=44 ohms.  For 5 ohms of R and 44 ohms of XL, Z = 44.3 ohms at an
angle of +83.5 degrees.  To convert this to its parallel equivalent:
 Y=-1/Z = 1/44.3 ohms, or 22.6 m.s at an angle of -83.5 degrees.  BL = sine
of -83.5 degrees*22.6 m.s = 22.4 m.s.  Using X=1/B = 44.64 ohms of XL.  G =
cosine of -83.5 degrees * 22.6 m.s = 2.55m/s.  Using R=1/G,  R=44.2 ohms.
Using Wes' suggestion, 44.2 ohms in parallel with 50 ohms =23.5 ohms.
Q=R/X = 23.5/44.64 = 0.52.

It looks like the relatively small amount of ESR in the nichrome Ls made
the VHF parasitic-oscillation suppressor's  VHF-Q decrease from 1.14 to
0.54.

Tom: please show us how you arrived at a Q of 1.0.
   I certainly would not want to continue  with the second and third
examples you proffered if there is an error in my method of solution.
-----------------------------
e-mail copy to Mr. Rauch, et al.

--
--Rich-- ag6k, 805-386-3734


From [e-mail] Wed Dec 11 20:09:59 1996
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From: [e-mail] (R. L. Measures )
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: Mon, 09 Dec 1996 21:38:48 -0800
Organization: Internet Access of Ventura County
Lines: 19
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In article <[e-mail]>,
[e-mail] (R. L. Measures ) wrote:

According to Will's archive, at least six times I asked Mr. Rauch whether
or not his AL-1500 8877 amplifier design used a VHF parasitic suppressor.
Mr. Rauch did not answer the question.
 This afternoon,  I received a telephone call from Marvin Born, KF8XU, who
is repairing an AL-1500 for a friend.  Marvin asked me if we still sell
suppressor retrofit kits.  I said yes.  I asked Marvin why he felt he
needed a kit.  He said that the AL-1500 had an intermittent VHF
oscillation, which he could see on a spectrum analyzer, as well see as on a
Tektronix 454 oscilloscope.  I asked Marvin if the AL-1500 uses a VHF
parasitic oscillation suppressor?  He said that the AL-1500 does not use
one.
---------------------------
e-mail copy to Mr. Rauch

--
--Rich-- ag6k, 805-386-3734


From [e-mail] Wed Dec 11 20:10:01 1996
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From: [e-mail] (R.L. Measures )
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: Sun, 08 Dec 1996 02:37:39 -0700
Organization: WestNet
Lines: 62
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
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In article <[e-mail]>, [e-mail]
wrote:

> In article <[e-mail]>, [e-mail]
> writes:
>
> >
> >I may be stepping into something that is out of my league, but it seems
> to
> >me that the "physical connection" argument smacks of religeous fantasy.
> >There was a time when virtually all significant RF coupling was done
> >inductively-...........snip......
>
> This is another area where Mr. Brown and Measures obviously do NOT
> understand what they are doing.
>
> The very requiremnt that current is removed from the oscillator, causing a
> dip, indicates coupling is VERY high! The oscillator coil in the dip meter
> has such high resonant currents that it has a very intense field.
>
> The coupling is so high it actually robs the oscillator of current, cause
> a dip to appear on the indicator.

I think he's finally got it.

...snip...

> Rich, you allude I adjust the resistance "to what I want". That statement
> is idotic when we look at the facts.

> You couple a GDO to a cold tube that appears as only reactances, when in
> operation each element has a very finite resistance.

While it is true that the HF tank transforms the 50 ohm load to the anode's
load R requirement, this is only the case at the operating frequency.  At
the anode circuit's VHF parallel-resonance, this is not the case.  Parallel
resonant circuits exhibit high R---and the higher the Q, the higher the R.
.  Since V gain is basicly mu multiplied by load R, the amplifier tube's V
gain could be high at the anode's VHF resonance---provided that its VHF Q
is high.  When a typically 1k to 4k ohm termination in placed on the anode
by the network analyzer, this is certainly representative of the HF load R.
However, the actual load R at the anode's VHF resonance could be hundreds
of k-ohms.  For example, with a 2k ohm load, VHF gain might be so low that
oscillation could not occur.  However, with a 200k ohm load, V gain would
be substantively higher and VHF oscillation might be sustainable.

> I find it remarkable you always seem to find fault with correct
> proceedures while using the worse methods possible in your tests.

(procedures)

> What about Q, how much change does you nichrome make at VHF? Is it a large
> cahnge, or insignificant?
>
I'm working on it, Tom.  I finally found someone who owns a 250MHz Q meter
who is willing to make some measurements.
---------------------------------------
e-mail copies to Mr. Rauch et al.

--
--Rich--
ag6k, 805.386.3734


From [e-mail] Wed Dec 11 20:10:01 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: 11 Dec 1996 14:21:07 GMT
Organization: AOL http://www.aol.com
Lines: 18
Message-ID: <[e-mail]>
References: <[e-mail]>
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X-Admin: [e-mail]
X-Newsreader: AOL Offline Reader

In article <[e-mail]>, "Tom C. Brown, Jr."
<[e-mail]> writes:

>Concerning the data you have been posting.....  were you measuring this
>stuff by connecting your instruments to a commercially made amp, just as
>I might buy off the shelf?

Yes

> Or, were you using a test circuit strictly
>designed to determine the operating characteristics of a tube?

You could call it that, since I changed the grid and other components to
conform with the changes being discussed.






From [e-mail] Wed Dec 11 20:10:03 1996
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From: [e-mail] (Brian Carling)
Newsgroups: rec.radio.amateur.boatanchors,rec.radio.amateur.homebrew
Subject: Great BA Web Site!
Date: Sat, 07 Dec 1996 00:23:19 GMT
Organization: Monumental Network Systems
Lines: 20
Distribution: inet
Message-ID: <58ano0$[e-mail]>
Reply-To: [e-mail]
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X-Newsreader: Forte Free Agent 1.0.82
Xref: news1.epix.net rec.radio.amateur.boatanchors:918 rec.radio.amateur.homebrew:21824

Hey guys - take a look at my web site!
Lot s of great goodies for ham radio BA operators and home-brewers!

Also I am curious why no -one on either of these NGs ever posts information
about OPERATING the old tube rigs!

Did you know there are actually NETS for folks running Boatanchors and / or
homebrew tube rigs?

Every evening on 7050 kHz and 3579 kHz starting at around 9 p.m.

Check 'em out! See you all on there with my 6AG7-6L6 soon!
Bry


73 from Bry  (((Amateur Radio G3XLQ / AF4K)))
http://www.mnsinc.com/bry
E-mail:  [e-mail]
Home of MEGALIST ham radio files, SWL info. etc. etc.



From [e-mail] Wed Dec 11 20:10:03 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Ham-Homebrew Digest V96 #529
Date: 9 Dec 1996 04:05:36 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]

Unless your into nostalgia using a 304tl isn't worth the trouble.You will
be lucky
to get it to operate above 20m. they require gobs of filament current and
all I
have seen were extremely gassy. IF you are really sure you ant to build an

amplifier using a 304tl have your tube(s) checked first to make sure they
are usable.


From [e-mail] Wed Dec 11 20:10:04 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: HAMCOM CONVERTER PROBLEMS
Date: Mon, 09 Dec 1996 15:52:43 GMT
Organization: Uniplus Internet Access
Lines: 18
Message-ID: <58gd2d$[e-mail]>
NNTP-Posting-Host: mail.uddeholm.se
X-Newsreader: Forte Free Agent 1.0.82

Hello

Im trying to get my hamcom converter to operate proparly. I have a
Kenwood TS9130 transiver and a 686 pentium computer.
im trying to get my converter to work with the morse function
but my transiver is very high impendance on the cw key input
and when i put in the plug in the transmitter it directly starts to
send.
I have try to couple the collector of the transistor to a 10kohm
resistor and to my radio power but without results

pse need ideas or help

73 de SM4WDQ

pse mailto:[e-mail]




From [e-mail] Wed Dec 11 20:10:05 1996
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From: [e-mail] (Ron Kremer)
Newsgroups: rec.radio.amateur.homebrew
Subject: HELP Bosch HFG164 E-prom
Date: Mon, 02 Dec 1996 23:11:41 GMT
Organization: World Online
Lines: 16
Message-ID: <[e-mail]>
NNTP-Posting-Host: hgvn1-p14.worldonline.nl
X-Newsreader: Forte Agent .99e/32.227


Hi,

Is there anybody who can give the
pin-designation of the E-prom in a
Bosch HFG164 handheld TRX.

The E-prom is of RCA manufacture
and has the following printed on it:
         CDP 18 U  42CD

Thanks in advance,

'73  Ron, PA 0 RKG




From [e-mail] Wed Dec 11 20:10:06 1996
Newsgroups: rec.radio.amateur.homebrew
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From: [e-mail] (Rajiv Dewan)
Subject: help with Weller 1001 Soldering Station
Message-ID: <[e-mail]>
Sender: [e-mail]
Nntp-Posting-Host: uhura.cc.rochester.edu
Organization: University of Rochester, Rochester NY
Date: Mon, 9 Dec 96 21:22:16 GMT
Lines: 13

I have a Weller 1001 soldering station that is acting up.
I heats up to about 120f (measured approximately by hand)
and then it cycles off.  If I cool the tip by touching it
then it cycles on to about 120f or so.

Any suggestions for fixing this are appreciated.

BTW, this problem occurs regardless of the temp pot setting.


regards,
Raj n2rd



From [e-mail] Wed Dec 11 20:10:07 1996
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From: "Spiro Evagelakos" <[e-mail]>
Newsgroups: aus.radio.amateur.misc,aus.radio.scanner,rec.ham-radio,rec.ham-radio.swap,rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.amateur.misc,rec.radio.scanner
Subject: Hlp:YAESU Transceiver FT-101Z
Date: 10 Dec 1996 09:16:12 GMT
Organization: NHJ NORTHLINK COMMUNICATIONS
Lines: 14
Distribution: aus
Message-ID: <01bbe67a$b8876460$[e-mail]>
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Hi,
My 20 watt transceiver has a burned out transformer . To purchase one new
it will cost me quite a few dollars.
Is there anyone in the Sydney area that could fix it for me......or is
willing to sell me a second hand cheap unit (as spares).

Please mail me at

[e-mail]

Thanks in advance
--




From [e-mail] Wed Dec 11 20:10:08 1996
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From: george <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Home Construction Project
Date: Sat, 7 Dec 1996 08:57:40 -0800
Organization: Elite Networking - Merced, CA
Lines: 6
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Check out my new home page "http://www.moschkau.com".

73
        George, W0LMN
        Merced, California


From [e-mail] Wed Dec 11 20:10:09 1996
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From: "Ian White, G3SEK" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: How to get QST?
Date: Tue, 3 Dec 1996 14:04:18 +0000
Organization: IFW Technical Services
Lines: 21
Distribution: world
Message-ID: <[e-mail]>
References: <57m51r$[e-mail]>
 <[e-mail]> <[e-mail]>
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Bob Lewis wrote:
>
>Or wait until the end of the year and purchase the whole year on CD ROM.
>Check out the ARRL website at http://www.arrl.org/
>
Apart from joining ARRL, that is the first workable suggestion that's
been offered.

Remember, the question came from GERMANY.

Strange as it may seem, QST and other American radio magazines are not
available at corner bookstores outside of the USA, or in local
libraries. If you go into a pharmacy outside of the USA to ask for QST,
they will offer a wide range of products to help with your delusional
state... but sorry, no radio magazines.


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 20:10:10 1996
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From: [e-mail] (Mike Morris)
Newsgroups: rec.radio.amateur.homebrew
Subject: I need a little help in designing a sequencer...
Date: Tue, 10 Dec 1996 00:25:02 pdt
Organization: Organization? Not much around here...
Lines: 47
Message-ID: <[e-mail]>
NNTP-Posting-Host: mfs-annex1-p3.dsphere.net

I'm trying to come up with a method of controlling the power to some equipment
.
I've experimented with capacitors and relays, but can't come up with something
that is as dependable at 35 farenheit as in 120 farenheit (i.e. winter
overnight to summer mid-day) - it's for a mobile application.
I could use a 555 driving 3 "D" type flip flops, or some firmware in a
PIC processor, but I was thinking that there has to be a simple way that
I'm overlooking....  Maybe I've been mangling computer code too long...

Heres the requirements - I suggest that you use a monospaced font
(like Courier) to view this timing diagram.  The timing resolution that
I need is about 1/4 to 1/2 second between signal rises and drops (it's
not that critical), and current handling of under 500ma per output.  I
have circuitry that will handle everything but the actual sequencing.

The control signal:
+5v or +12v-----+                                     +----------
                !                                     !
                !                                     !
gnd             +-------------------------------------+


Output A: (makes first (i.e. immediately), drops last)
+5 or +12v      +-----------------------------------------------+
                !                                               !
                !                                               !
gnd-------------+                                               +-----

Output B: (makes 2nd, drops 2nd)
+5 or +12v          +--------------------------------------+
                    !                                      !
                    !                                      !
gnd-----------------+                                      +-----

Output C: (makes last, drops first, i.e. when the control signal goes inactive
)
+5 or +12v              +-----------------------------+
                        !                             !
                        !                             !
gnd---------------------+                             +----------


Anyway, any help will be VERY much appreciated.


Mike Morris   WA6ILQ





From [e-mail] Wed Dec 11 20:10:11 1996
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From: [e-mail] (Conrad Hoffman)
Newsgroups: rec.radio.amateur.homebrew
Subject: I Need an NPO Trimmer
Date: Sat, 07 Dec 1996 16:34:48 GMT
Organization: PSS InterNet Services, Interneting Florida and beyond 904 253 7100
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Hi,

Looking for a chassis mount  5-25 NPO ceramic trimmer capacitor.  The
part that sticks thru the chassis is 1/2 inch in diameter.  Am trying
to repair a Collins VFO.

Thanks,  Conrad



From [e-mail] Wed Dec 11 20:10:12 1996
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From: [e-mail] (Bruce W. Martin)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: IC-27H Tone Encoder
Date: Tue,  3 Dec 1996 16:28:54 -0600
Organization: telalink
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In article <[e-mail]>, [e-mail] (Robert
Mitchell) writes:
> From: [e-mail] (Robert Mitchell)
> Newsgroups: rec.radio.amateur.homebrew
> Subject: IC-27H Tone Encoder
> Date: Sun, 01 Dec 1996 00:06:07 GMT
> Organization: Vaxxine Public Internet Access
>
>
>       Does anyone have any information on how to modify a ICOM
> IC-27H to enable the subaudible tone encoder to tramsmit on simplex as
> well as on duplex.
>
>       Any assistance would be greatly appreciated.
>
> Bob  -  VE3KYA
> [e-mail]
>


IC-x7A series radios do not use tone on simplex, however, you can "trick" the
radio by setting it to duplex and changing the offset to 0.00, then you can
set the tone encoder on.

Hope this helps,

Bruce


--
***************************************************************
* Bruce W. Martin           Internet: [e-mail]   *
* 4558 Brooke Valley Dr.    HAM Call: KQ4TV                   *
* Hermitage TN  37076-2650   Voice:     [phone]        *
* FAX/MODEM: [phone]      APRS:3610.50N/08635.50W      *
* "Being a Mac user is like being a Navy SEAL: a small, elite *
*  group of people with access to the most sophisticated      *
*  technology in the world, who everyone calls on to get the  *
*  really tough jobs done quickly and efficiently."           *
*  -- Nick Lehmann                                            *
***************************************************************



From [e-mail] Wed Dec 11 20:10:13 1996
Newsgroups: rec.radio.amateur.homebrew
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From: [e-mail] (Gary Coffman)
Subject: Re: Inexpensive but reliable frequency counter?
Message-ID: <[e-mail]>
Reply-To: [e-mail] (Gary Coffman)
Organization: Destructive Testing Systems
References: <[e-mail]> <[e-mail]> <57gao0$[e-mail]>
Date: Tue, 3 Dec 1996 19:24:02 GMT
Lines: 31

In article <57gao0$[e-mail]> [e-mail] (Richard Karlquist
) writes:
>In article <[e-mail]>,
>Gary Coffman <[e-mail]> wrote:
>>
>>IMHO, a counter is a lot less useful than it may at first appear.
>>Counters only give reliable readings when fed pure sinewaves.
>>They will often lock to a harmonic or subharmonic of a typical
>>complex signal. *AND YOU WON'T KNOW THAT.* I'd much rather have
>>a scope, even a relatively cheap import scope, than to have a
>>counter. Of course having both is better.
>
>This depends on the counter.  For cheap "ham" type counters,
>this is probably fairly accurate.  However, many "universal"
>type counters, such as the HP 5334B*, have front ends and triggering
>circuits that are practically the same as scopes.  I.E., you
>can set triggering for positive slope or negative slope, and
>set the trigger level as well.

I don't dispute this at all. However, if you don't know what the
signal *looks* like, you're just guessing when you adjust the
counter trigger. You might not be measuring what you think you
are at all. That's where the scope is invaluable. It allows you
to see what the waveform looks like so that you can intelligently
adjust your counter to measure it.

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] Wed Dec 11 20:10:14 1996
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From: [e-mail] (les)
Newsgroups: rec.radio.amateur.homebrew
Subject: info requested on bytek s10 eprom programmer
Date: Sun, 8 Dec 1996 22:30:24
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From [e-mail] Wed Dec 11 20:10:16 1996
Newsgroups: rec.radio.amateur.homebrew
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From: [e-mail] (Gary Coffman)
Subject: Re: KISS
Message-ID: <[e-mail]>
Reply-To: [e-mail] (Gary Coffman)
Organization: Destructive Testing Systems
References: <[e-mail]> <[e-mail]>
Date: Tue, 3 Dec 1996 19:18:54 GMT
Lines: 34

In article <[e-mail]> [e-mail] wri
tes:
>In article <[e-mail]>, [e-mail]
>(Gary Coffman) writes:
>>
>>I do think that many of Rich's proposed mechanisms are highly
>implausible.
>>OTOH, Tom's rather cavalier explanations don't wash either. Amplifiers
>*can*
>>break into oscillation.
>
>I never said amplifiers "can't" oscillate. I just indicated that by proper
>design and testing the likelyhood of oscillation can be reduced to zero.

Zero is pretty strong. It is very hard to prove a negative. How can you
ever be sure you've tested all *possible* conditions?

>In over 20 years of commercial PA design and 34 years of amateur PA design
>and construction I have never found a PA that "oscillates" in the field
>through a defect or fault rooted in the PA that can not be made to
>oscillate in a test situation.
>
>That's not a guess, it's a fact.

Then I guess you're better than the boys from RCA and Harris, because
we've had oscillations in the field that they couldn't duplicate back
at the factory, and they had to send field engineers out to find and
fix the problems on site.

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] Wed Dec 11 20:10:17 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: KISS
Date: 4 Dec 1996 15:43:58 GMT
Organization: America Online, Inc. (1-800-827-6364) (1.14)
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Hi Gary,
In article <[e-mail]>, [e-mail]
(Gary Coffman) writes:

>Zero is pretty strong. It is very hard to prove a negative. How can you
>ever be sure you've tested all *possible* conditions?

That's why I go over voltage on the PA, and vary the bias durning the
test. That's why I have a stepped relay switched line section for rotating
phase and impedance in the load.

>>In over 20 years of commercial PA design and 34 years of amateur PA
design
>>and construction I have never found a PA that "oscillates" in the field
>>through a defect or fault rooted in the PA that can not be made to
>>oscillate in a test situation.
>>
>>That's not a guess, it's a fact.
>
>Then I guess you're better than the boys from RCA and Harris, because
>we've had oscillations in the field that they couldn't duplicate back
>at the factory, and they had to send field engineers out to find and
>fix the problems on site.

I have no control over other's test methods, so I can't speak for or
against any of your claims.

It is a fact that any oscillation occuring in the field can be duplicated
in the lab, unless the source of oscillation is RF ingress into a low
level stage that is not part of the lab tested system.

73 Tom


From [e-mail] Wed Dec 11 20:10:18 1996
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From: [e-mail] (R. L. Measures )
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: KISS
Date: Fri, 06 Dec 1996 12:22:59 -0700
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In article <[e-mail]>, [e-mail]
(Gary Coffman) wrote:

snip...

> The point is that test as you will a priori, you can never be sure
> you've covered every possible condition that may arise in the field.
> So to claim that there is *zero* chance of a parasitic or other fault
> in the field is hubris.
>
> Gary
> --
Very interesting, Gary.  Is hubris is a factor in this fracas?   When a guy
becomes a self-appointed self-annointed "recognized amplifier expert" in
QST magazine (p.71, 9/94), he has to defend himself absolutely, positively,
100% of the time.  For instance---I worked the parallel Ls-Rs suppressor
current division problem that Mr. Rauch proposed (70nH, 100 ohms @161MHz).
The results showed that Mr. Rauch's statement about insignificant VHF
current flowing in Ls is not the case.  In fact the current in Ls was a bit
more than the current in Rs.   Instead of conceeding this one, Mr. Rauch
started backpeddling.

To me, Gary, the most fascinating thing about hubristic persons is that
they become their own character-assassins.  For instance---:  If Richard
Millhouse Nixon had gone on TV the morning after the Watergate Breakin and
said:  I ordered the breakin............Nixon would most probably have
fared far better.

" Man will occcassionally stumble over the truth, but most of the time he
will pick himself up and continue on".  ---Winston Churchill
---------------------------
e-mail copies to Mr. Coffman, Mr. Rauch, et al.

--
--Rich-- ag6k, 805-386-3734


From [e-mail] Wed Dec 11 20:10:19 1996
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From: [e-mail] (R. L. Measures )
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: KISS
Date: Sat, 07 Dec 1996 12:22:45 -0700
Organization: Internet Access of Ventura County
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References: <[e-mail]> <[e-mail]>
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In article <[e-mail]>, [e-mail]
wrote:

> Hi Richard,
>
> Instead of more RM style personal attacks and non-technical comments about
> the other Richard we all know of, I'd like to see you answer questions
> about Q.

???

> I think your parasitic theories are absolutely wrong. VHF Q does NOT
> change significantly with the addition of nichrome, and that is a fact you
> are trying to avoid. As a matter of fact, a small adjustment in the
> suppressor resistance and inductance makes a larger change than the
> addition of "nichrome".

Since our telephone conversation of 1990, I have been aware that you have a
different opinion, Tom.  However, you appear to base your opinion on the
assumption that insignificant current flows in the suppressor inductor, Ls.
When presented with the calculations (from your own Ls-Rs-f I-problem) that
similar VHF currents flow in both Rs and Ls, you proffered a plethora of
seemingly unplausible arguments to the contrary.


> You realize if the nichrome in the suppressor's winding of wire does not
> significantly lower VHF Q, then everything you attribute to VHF
> oscillation must be a product of vivid imaginations, or directly
> attributed to MY claim that HF Q and mistuning / overdriving are the major
> causes of arcs and sparks in the tank.

I do not realize that resistance wire (nichrome) has no effect on VHF-Q.  I
have realized that the observed dips in amplifiers' anode VHF-resonant
circuits is rather different when silver-plated strap suppressor inductors
(Ls) are replaced with resistance wire suppressor inductors.  With silver
conductors, the dip is sharper and deep.  With the resistance wire
suppressors, the dip is broader and shallower.  This is nothing new, Tom.
Mr. F. E. Handy was aware of this technique 70 years ago..  You can read
about it in the 1926 Edition of the *Radio Amateur's Handbook*.  You can
read about it in the 10/88, 9/90, 10/90 and 1/94 issues of *QST* magazine.
There's an article about calculating values for VHF parasitic-suppressors
in the 3/89 issue.

> Let's make an agreement.

I am reluctant to make an agreement with you, Mr. Rauch.

> If I can not lower Q (using coventional components) the same amount or
> more at VHF without adding as much loss of Q on ten meters as the nichrome
> does, I will concede you have been hawking something of ### great
> technical merit ###. I will endorse your product as a good method of
> parasitic suppression.

 An endorsement from someone who dismisses well-established AC circuit
analysis, who purports that dipmeters are incapable of finding resonances,
would amount to an UNendorsement.
--------------------------------
e-mail copies to Mr. Rauch, et al.

--
--Rich-- ag6k, 805-386-3734


From [e-mail] Wed Dec 11 20:10:21 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: KISS
Date: 7 Dec 1996 04:31:50 GMT
Organization: AOL http://www.aol.com
Lines: 35
Message-ID: <[e-mail]>
References: <[e-mail]>
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Hi Richard,

Instead of more RM style personal attacks and non-technical comments about
the other Richard we all know of, I'd like to see you answer questions
about Q.

I think your parasitic theories are absolutely wrong. VHF Q does NOT
change significantly with the addition of nichrome, and that is a fact you
are trying to avoid. As a matter of fact, a small adjustment in the
suppressor resistance and inductance makes a larger change than the
addition of "nichrome".

You realize if the nichrome in the suppressor's winding of wire does not
significantly lower VHF Q, then everything you attribute to VHF
oscillation must be a product of vivid imaginations, or directly
attributed to MY claim that HF Q and mistuning / overdriving are the major
causes of arcs and sparks in the tank.

Let's make an agreement.

If I can not lower Q (using coventional components) the same amount or
more at VHF without adding as much loss of Q on ten meters as the nichrome
does, I will concede you have been hawking something of ### great
technical merit ###. I will endorse your product as a good method of
parasitic suppression.

If the system you hawk does NOT significantly reduce VHF Q at or near the
frequency of oscillation (let's say between 140 and 200 MHz) compared to
what I can do with conventional components, will you admit the VHF
parasitic cures and theories you have been making are false?

This sounds fair to me, since you claim to have re-discovered the only
cure for VHF parasitics.

73 Tom


From [e-mail] Wed Dec 11 20:10:22 1996
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From: woody white <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: looking for low ppm trim pots
Date: Sun, 08 Dec 1996 14:10:33 -0800
Organization: http://www.geocities.com/capecanaveral/3722
Lines: 20
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References: <[e-mail]>
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Agreed... Vishay makes the best money can buy- but apparently keep low
inventories.  Does "Bourns" make anything that will work?
Woody

Chris Mesibov wrote:
>
> Looking for some good sources that have "RJR" style trimmer pots  with
> low tempco.  Dale/Vishay is quoting me 6 weeks on a 17s102! Who has
> stock?
>
> Thanks,
> Chris

--
de  Woody (WB4QXE) -  [e-mail]
Electron Microscopist/Microanalysist,
Ham radio "homebrewer", shade tree mechanic,
'90 Nissan 240SX, wish still had my Mcycle too!
http://www.geocities.com/capecanaveral/3722
.


From [e-mail] Wed Dec 11 20:10:23 1996
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From: [e-mail] (H. Caron)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Loop antenna theory?
Date: Mon, 02 Dec 1996 18:07:26 GMT
Organization: Infobahn Online Services, Montreal, CANADA [phone]
Lines: 40
Message-ID: <57vjpb$[e-mail]>
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Madjid <[e-mail]> wrote:

>Robert Nase Johnson wrote:
>>
>> Hello -- I'm designing a VLF loop antenna and have read that the
>> sensitvity of such an antenna is affected both by number of turns and
>> area of the loop. My question is, if you can't have both, which is the
>> most important?

>For a receiving loop, the voltage
>induced by an E field is:

>   V  = 2.Pi.A.n.E.Cos(Angle)/lambda

>  A Area
>  n Number of turns
>  E field in V/m
>  Angle  angle between plane of loop and signal

>If tuned (capacitor) multiply the above by Q
>loaded Q of tuned circuit formed by antenna
>and capacitor.

>Depends of what you want to use it for, space
>avalaible etc... as you can see from the formula
>you can play on Area or Number but the more turns
>the more difficult to tune at low frequencies and
>find a suitable capacitor.

>-------------------
>Madjid, VE2GMI - Home Page: http://www.CAM.ORG/~mboukri
>NEC4WIN Antenna simulation for Windows

Hi Madjid,

What's lambda and shouldn't E field be in Volts/m2 (squared)

Thanks
H.C.



From [e-mail] Wed Dec 11 20:10:24 1996
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From: Niels Montanana <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: M55727 Mitsubishi RF Power Module
Date: 9 Dec 1996 10:04:13 GMT
Organization: Legal & Commercial Publishing
Lines: 5
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Has anyone used the M55727 Mitsubishi RF Power Module for a
P.A. stage at 144Mhz ?

I am after the power supply, biasing and de-coupling circuit.



From [e-mail] Wed Dec 11 20:10:25 1996
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From: [e-mail] (Dean T. Miller)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Making RF notch/ bandpass filters?
Date: 4 Dec 1996 15:56:16 GMT
Organization: Miller and Associates
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References: <581aus$[e-mail]>
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In article <581aus$[e-mail]>, From [e-mail] (Jack Kovar
 KE0AX), the following was written:
> I would like to make some RF filter networks to insert into VHF
> antenna
>
> path to notch down paging frequenies in 151mhz range.

Hi Jack,

Couldn't you simply go to Radio Shack and get one of their TVI filters?
They have 2 or 3 that could either work as-is or be easily modified.
(and cheap)



From [e-mail] Wed Dec 11 20:10:26 1996
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From: [e-mail] (Stephen Muther)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Making RF notch/ bandpass filters?
Date: 4 Dec 1996 10:15:44 -0800
Organization: BEST Internet Communications
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References: <581aus$[e-mail]> <[e-mail]>
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In article <[e-mail]>,
Dean T. Miller <[e-mail]> wrote:
>In article <581aus$[e-mail]>, From [e-mail] (Jack Kovar
> KE0AX), the following was written:
>> I would like to make some RF filter networks to insert into VHF
>> antenna
>>
>> path to notch down paging frequenies in 151mhz range.
>
>Hi Jack,
>
>Couldn't you simply go to Radio Shack and get one of their TVI filters?
>They have 2 or 3 that could either work as-is or be easily modified.
>(and cheap)
>

There are some inline filters used by CATV companies which are broad
bandstop filters between 108 and 170MHz.  I think they were used to
block midband cable channels from subscribers homes unless they paid
and additional expanded service fee.  I'd be interested in one myself.
Since I no longer work for a CATV equipment manufacturer, I don't
get the CATV hardware catalogs like I used to.  If anyone knows of
a source for these filters, I'd like to know about it.

Steve Muther
WF6R



From [e-mail] Wed Dec 11 20:10:27 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Making RF notch/ bandpass filters?
Date: 5 Dec 1996 13:18:30 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 Jack--

Seems like there are at least a couple of paths you could take, depending
upon your application. If you are not transmitting through the filter, you
could make up a 2-3 section LC bandpass configuration using Hi-Q caps
(much like Tucker does with their intermod filter).  This will introduce
5-6 dB loss in the passband, but rejection outside the passband can easily
exceed 40 dB.  As an alternative, if you are transmitting through the
filter, you could make a very high Q "suckout" trap for 152 MHz.  If the Q
is high enough, loss at 146 MHz will be negligible while attenuation at
the pager frequencies might be 20-30 dB.  I would avoid inexpensive
off-the-shelf filters made with cheap ceramic caps.  From my experience
(which isn't all that extensive), I've found that to get good results,
you'll need low-loss high-Q components.

Rick  K1BQT


From [e-mail] Wed Dec 11 20:10:28 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: MAR-1,2,3,4,4,6, where to obtain?
Date: 2 Dec 1996 15:55:49 GMT
Organization: AOL http://www.aol.com
Lines: 11
Message-ID: <[e-mail]>
References: <57ounp$[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

Hi Pertti. You can buy them Stateside from Mini-Circuits Laboratories. In
stock and immediate delivery
P.O. Box 350166 Brooklyn, NY 11235-0003

In Europe,

44-252-835094
FAX [phone]

GL
W4ZCB


From [e-mail] Wed Dec 11 20:10:29 1996
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From: james brunelle <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: METER REPAIRS
Date: 5 Dec 1996 03:21:50 GMT
Organization: Multi-Medias Quebec
Lines: 16
Message-ID: <585f4e$[e-mail]>
NNTP-Posting-Host: modem36-annex01.multi-medias.ca
Mime-Version: 1.0
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Do you need a Meter Repaired (Analog or Digital) Vom,s, Analog
Multimeter's, Digital Multimeters, Panel Meters, Capacitance Meters, LCR,
Meters, Clamp-on Ammeters, Oscilloscopes, Function Generators etc. Give
us a try we have been in business 25 years and we have stock of many of
the older type meters made by the following companys TRIPLETT, SIMPSON,
WESTON, AMPROBE, BEEDE, G.E. etc. No we don't charge for Estimates just
Mail us the unit and we will give you a very fair ESTIMATE first.

WEBB Page WWW.Channeli.com/brunelle
E-Mail:[e-mail]
Tel: [phone]
Fax: [phone]
BRUNELLE INSTRUMENTS INC

When Accuracy Counts...You Can Count on US!



From [e-mail] Wed Dec 11 20:10:30 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.net!news.idt.net!feed1.news.erols.com!worldnet.att.net!uunet!in3.uu.net!198.168.54.138!rcogate.rco.qc.ca!altitude!usenet
From: Madjid <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Microwave Antenna Design
Date: Wed, 11 Dec 1996 01:22:41 -0500
Organization: ORION Microsystems
Lines: 16
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: dynamicppp-195.hip.cam.org
Mime-Version: 1.0
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Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.0 (Win16; I)
To: James Mills <[e-mail]>

James Mills wrote:
>
> Hello Everybody,
>
> Does anybody know of some good software / shareware for microwave
> antenna and circuit design for microstrip work.
>
> Regards

Try PCAAD21, the URL is:

http://search.shareware.com/code/engine/File?archive=sim-msdos&file=electrcl%2
fpcaad21%2ezip&size=164726

-------------------
Madjid, VE2GMI - Home Page: http://www.CAM.ORG/~mboukri
NEC4WIN Antenna simulation for Windows


From [e-mail] Wed Dec 11 20:10:31 1996
Newsgroups: rec.radio.amateur.homebrew
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!netcom.com!dgf
From: [e-mail] (David Feldman)
Subject: Microwave surplus dealers in LA area?
Message-ID: <[e-mail]>
Organization: Organization? Me?
Distribution: usa
Date: Tue, 3 Dec 1996 22:32:35 GMT
Lines: 6
Sender: [e-mail]

On an upcoming trip to LA, I have some time to visit local surplus
dealers/junkyards. Are there any to be recommended that have microwave
type hardware?

73 Dave WB0GAZ [e-mail]



From [e-mail] Wed Dec 11 20:10:32 1996
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From: "D. H. Frank" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Mitsubishi M57727 Power Module
Date: Tue, 10 Dec 1996 20:45:21 -0700
Organization: AT&T WorldNet Services
Lines: 4
Message-ID: <[e-mail]>
NNTP-Posting-Host: 207.147.17.9
Mime-Version: 1.0
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If anyone needs a new, in the box, never used module, I have one I will
send you via USMail for $40. That's about $20 below what you would pay
at RF Parts.
If interested contact Don, W9SL, via email or at 303/741-1503, anytime.


From [e-mail] Wed Dec 11 20:10:33 1996
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From: [e-mail] (Glenn Elmore)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Mitsubishi Power Module M57727
Date: 9 Dec 1996 16:42:03 GMT
Organization: Hewlett Packard Sonoma County
Lines: 28
Message-ID: <58hfgr$[e-mail]>
References: <58go0m$[e-mail]>
NNTP-Posting-Host: n6gn.sr.hp.com
X-Newsreader: TIN [version 1.2 PL2.2]

Niels Montanana ([e-mail]) wrote:
: Does anyone have any experience of using the M57727 Mitsubishi
: RF Power Module on 2m?

: I am particularly after the power supply/biasing requirements
: and de-coupling arrangements.

  I've used Mitsubishi models from 2M through 27cm with very good
success.  There really isn't a lot special you have to do to make them
work.  I would probably decouple with a ferrite bead on the three Vcc
lines and use normal bypassing technique out beyond them.  There are
builtin bypasses on all three lines.  Shunting with an additional C is
possible but runs the risk of a parallel resonance from the two
capacitors and leads, so its probably best to use a bead inbetween.

  Be sure to have a good ground at the heatsink.  Make sure the module
sits flat and that there isn't any anodizing on the sink surface which
prevents good RF contact.

  I've used three terminal regulators as bias sources and switched them
on and off to enable the 9V Vbb bias line.

  You should be able to transition to microstrip by placing the bias
board right next to the package and under the pins.


Glenn Elmore n6gn



From [e-mail] Wed Dec 11 20:10:34 1996
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From: Niels Montanana <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Mitsubishi Power Module M57727
Date: 9 Dec 1996 18:14:10 GMT
Organization: Legal & Commercial Publishing
Lines: 24
Message-ID: <58hkti$[e-mail]>
References: <58go0m$[e-mail]> <58hfgr$[e-mail]>
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Mime-Version: 1.0
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To: [e-mail]

That's pretty similar to my original thoughts. I took a look
at some of the Motorola hybrid application notes and decided
on the following:

1.  1nF and 100nF capacitors decoupling the Vcc and Vbb lines
immediately where the module wires are soldered to the pcb.

2.  Ferrites on all power lines.

3.  10uf Tantalum bead capacitors at the power feed end of the
line (opposite side to the ferrite beads)

4.  Vbb via a MC7809 regulator mounted on the board.

5.  Vcc from the main +ve rail.

If you think this should be okay I'll go ahead - the modules
are pretty expensive so I don't want it to go up in smoke !

Niels Montanana
G8RWG

[e-mail]



From [e-mail] Wed Dec 11 20:10:35 1996
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From: Niels Montanana <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Mitsubishi Power Module M57727
Date: 9 Dec 1996 10:00:54 GMT
Organization: Legal & Commercial Publishing
Lines: 6
Message-ID: <58go0m$[e-mail]>
NNTP-Posting-Host: max211.ftech.co.uk
Mime-Version: 1.0
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Does anyone have any experience of using the M57727 Mitsubishi
RF Power Module on 2m?

I am particularly after the power supply/biasing requirements
and de-coupling arrangements.



From [e-mail] Wed Dec 11 20:10:36 1996
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From: [e-mail] (Jim Potter)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Mitsubishi Power Module M57727
Date: Tue, 10 Dec 1996 00:36:58 GMT
Organization: JP Accelerator Works, Inc.
Lines: 24
Message-ID: <[e-mail]>
References: <58go0m$[e-mail]> <58hfgr$[e-mail]> <58hl3h$[e-mail]>
Reply-To: [e-mail]
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Niels Montanana <[e-mail]> wrote:

>If you think this should be okay I'll go ahead - the modules
>are pretty expensive so I don't want it to go up in smoke !
>
>Niels Montanana
>G8RWG
>
>[e-mail]
>
One good way to smoke them is to exceed their maximum drive power
limit. The limit is always well above what is needed for maximum
output, but if your driver stage has excess power output be careful.

73 de K9GXC, Jim




James M. Potter, President              TEL: [phone]
JP Accelerator Works, Inc.              FAX: [phone]
2245 47th Street                        EMAIL: [e-mail]
Los Alamos, NM 87544-1604               URL: http://www.jpaw.com



From [e-mail] Wed Dec 11 20:10:37 1996
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From: Duncan Clark <[e-mail]>
Newsgroups: rec.radio.amateur.equipment,rec.radio.amateur.homebrew
Subject: Mods to SB1000?
Date: Mon, 9 Dec 1996 18:43:12 +0000
Organization: GeneSys Ltd.
Lines: 14
Distribution: world
Message-ID: <[e-mail]>
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Xref: news1.epix.net rec.radio.amateur.equipment:44021 rec.radio.amateur.homebrew:21920

Hi folks,

Are there any mods available for the Heathkit SB1000 Linear? I am just
about to put an original kit together and before I do I'd be interested
in alterations ie use on 6m by dropping out say 160m, alternative taps
on the pi network coil for 17m and 12m operation without compromising
15m and 10m too much, electronic bias switching etc. Any known hiccups
with the linear to be aware of?

Many thanks

Duncan
G4ELJ



From [e-mail] Wed Dec 11 20:10:38 1996
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From: [e-mail] (W6KKT Jesse)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: More amplifier stuff
Date: Sun, 08 Dec 1996 16:04:00 GMT
Organization: Microserve Information Systems (800)-380-INET
Lines: 35
Distribution: world
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
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X-Newsreader: Forte Agent .99e/16.227

On 17 Nov 1996 02:29:10 GMT, [e-mail] wrote:

>In article <[e-mail]>, [e-mail] (W6KKT
>Jesse) writes:
>
>>Mario, without a doubt, your test method is without peer!  I would
>>never have thought to short an  antenna that was connected to a "over
>>driven", un-loaded  SB-220 to compare the DC with the un-loaded RF
>>voltage. By the way, what was the exact magnitude of the RF voltage
>>and the instrument used to measure it?  Or, was "almost" melting the
>>output connector the guage you used to determine the RF voltage was
>>twice the DC voltage?
>>Jesse, W6KKT (50 miles north of Hollywood)
>
>Hi Jesse,
>
>One manufacturer requires a short load test on ever PA leaving the
>factory, as well as an open load at full drive, to weed out close wires
>and weak components in tanks.
>
>The goal is to make sure the plate tuning cap or an intentional gap arcs
>before the switch, and any weak components (like padding capacitors) fail.
>
>One process of designing a new **Amateur** PA is to run 15% more than
>rated HV, short the load, and apply full drive. Components are sized to
>just barely be beyond arcing under that condition. Commercial units enjoy
>more protection and margin.
>
>73 Tom

Hi Tom, the above acid test methods may be okay for a manufacturer of
amplifiers, with a inventory of spare parts.  I'm sure you don't mean
for the average Ham to do that kind of test for instability.  It could
be very expensive, especially with a out of production SB-220.
73, Jesse, W6KKT


From [e-mail] Wed Dec 11 20:10:40 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!news-out.microserve.net!news-in.microserve.net!not-for-mail
From: [e-mail] (W6KKT Jesse)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: More amplifier stuff
Date: Sun, 08 Dec 1996 15:03:00 GMT
Organization: Microserve Information Systems (800)-380-INET
Lines: 35
Distribution: world
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
NNTP-Posting-Host: dyn26.frazmtn.com
X-Newsreader: Forte Agent .99e/16.227

On 17 Nov 1996 02:29:10 GMT, [e-mail] wrote:

>In article <[e-mail]>, [e-mail] (W6KKT
>Jesse) writes:
>
>>Mario, without a doubt, your test method is without peer!  I would
>>never have thought to short an  antenna that was connected to a "over
>>driven", un-loaded  SB-220 to compare the DC with the un-loaded RF
>>voltage. By the way, what was the exact magnitude of the RF voltage
>>and the instrument used to measure it?  Or, was "almost" melting the
>>output connector the guage you used to determine the RF voltage was
>>twice the DC voltage?
>>Jesse, W6KKT (50 miles north of Hollywood)
>
>Hi Jesse,
>
>One manufacturer requires a short load test on ever PA leaving the
>factory, as well as an open load at full drive, to weed out close wires
>and weak components in tanks.
>
>The goal is to make sure the plate tuning cap or an intentional gap arcs
>before the switch, and any weak components (like padding capacitors) fail.
>
>One process of designing a new **Amateur** PA is to run 15% more than
>rated HV, short the load, and apply full drive. Components are sized to
>just barely be beyond arcing under that condition. Commercial units enjoy
>more protection and margin.
>
>73 Tom

Hi Tom, the above acid test methods may be okay for a manufacturer of
amplifiers, with a inventory of spare parts.  I'm sure you don't mean
for the average Ham to do that kind of test for instability.  It could
be very expensive, especially with a out of production SB-220.
73, Jesse, W6KKT


From [e-mail] Wed Dec 11 20:10:41 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.net!www.nntp.primenet.com!nntp.primenet.com!enews.sgi.com!news.sgi.com!news-out.microserve.net!news-in.microserve.net!not-for-mail
From: [e-mail] (W6KKT Jesse)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: More amplifier stuff
Date: Sun, 08 Dec 1996 15:05:30 GMT
Organization: Microserve Information Systems (800)-380-INET
Lines: 35
Distribution: world
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
NNTP-Posting-Host: dyn16.frazmtn.com
X-Newsreader: Forte Agent .99e/16.227

On 17 Nov 1996 02:29:10 GMT, [e-mail] wrote:

>In article <[e-mail]>, [e-mail] (W6KKT
>Jesse) writes:
>
>>Mario, without a doubt, your test method is without peer!  I would
>>never have thought to short an  antenna that was connected to a "over
>>driven", un-loaded  SB-220 to compare the DC with the un-loaded RF
>>voltage. By the way, what was the exact magnitude of the RF voltage
>>and the instrument used to measure it?  Or, was "almost" melting the
>>output connector the guage you used to determine the RF voltage was
>>twice the DC voltage?
>>Jesse, W6KKT (50 miles north of Hollywood)
>
>Hi Jesse,
>
>One manufacturer requires a short load test on ever PA leaving the
>factory, as well as an open load at full drive, to weed out close wires
>and weak components in tanks.
>
>The goal is to make sure the plate tuning cap or an intentional gap arcs
>before the switch, and any weak components (like padding capacitors) fail.
>
>One process of designing a new **Amateur** PA is to run 15% more than
>rated HV, short the load, and apply full drive. Components are sized to
>just barely be beyond arcing under that condition. Commercial units enjoy
>more protection and margin.
>
>73 Tom

Hi Tom, the above acid test methods may be okay for a manufacturer of
amplifiers, with a inventory of spare parts.  I'm sure you don't mean
for the average Ham to do that kind of test for instability.  It could
be very expensive, especially with a out of production SB-220.
73, Jesse, W6KKT


From [e-mail] Wed Dec 11 20:10:42 1996
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!pmfr2ip27.ici.net!user
From: [e-mail] (Bruce KD1MW )
Newsgroups: rec.radio.amateur.homebrew
Subject: N connectors FS
Date: 8 Dec 1996 02:51:34 GMT
Organization: The Internet Connection
Lines: 5
Message-ID: <[e-mail]>
NNTP-Posting-Host: pmfr2ip27.ici.net

N (M), connectors, crimp type, silver plated, by King Electronics Co. Part
# KN-59-309-MO7.  Good for RG 6 Foam size coax. $12 for 10 connectors plus
shipping.
Thanks, Bruce KD1MW...
[e-mail]


From [e-mail] Wed Dec 11 20:10:44 1996
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From: [e-mail] (Mike McCarty)
Newsgroups: rec.radio.amateur.homebrew,rec.radio.cb,sci.electronics.design,sci.electronics.misc
Subject: Re: NBFM modulator: newbee help: what is de-emphasis exactly?
Date: 5 Dec 1996 02:02:12 GMT
Organization: DSC Communications Corporation
Lines: 45
Message-ID: <585af4$[e-mail]>
References: <[e-mail]> <56f1bi$pp6$[e-mail]> <56iql6$[e-mail]> <57ivmd$[e-mail]>
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Xref: news1.epix.net rec.radio.amateur.homebrew:21727 rec.radio.cb:38712 sci.electronics.design:27221 sci.electronics.misc:18214

In article <57ivmd$[e-mail]>,
John Lundgren <[e-mail]> wrote:
)Mike McCarty ([e-mail]) wrote:
): In article <56f1bi$pp6$[e-mail]>,
): tyler <[e-mail]> wrote:
): )
): )>>The standard varactor FM modulator does not inherently add pre-emphasis,

): )>>so an external pre-emphasis network is used to allow PM and FM radios
): )
): )Being relatively new to this NG, what is pre-and de-emphasis exactly?  I k
now
): )it's used in FM communications, but how and why?  Why is it needed?  FM
): )commercial stations use it.  Why?  I'm reading this post on it and I'm kin
d of
): )lost.  Any help would be greatly appreciated.  Thanks.
): )Tyler
): )N3SPD
)
): It is a noise-reduction scheme. Most of the noise in FM systems is what
): might be termed "high frequency" or "hiss" (similar to tape). So the
): high frequencies are "pre-emphasized" (i.e. get more gain than the lower
): frequencies). Then when played back, the high frequencies are
): "de-emphasized" (get lower gain). This raises the overall signal/noise
): ratio.
)
): Similar schemes are used in tape decks, and on vinyl records (RIAA
): equalization, also called 75us equalization). Dolby is a similar scheme.
)
)With reccords, the velocity of the needle is lower at low freqs, so the
)signal is much lower in amplitude.  SO the EQ curve has more gain at lo
)freqs.  THat's the opposite of FM which has equal gain up to 2 kHz, then
)the gain falls off.
)
)Dolby isn't a static equalization, it's dynamic.

Yes, what you say is true. And I knew it. But it doesn't contradict
what I said in any way. Your tone seems to indicate a corrective
measure due to its terseness.

What gives?

Mike
--
----
char *p="char *p=%c%s%c;main(){printf(p,34,p,34);}";main(){printf(p,34,p,34);}
This message made from 100% recycled bits.
I don't speak for DSC.         <- They make me say that.


From [e-mail] Wed Dec 11 20:10:45 1996
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!bigboote.WPI.EDU!cam-news-feed2.bbnplanet.com!news.bbnplanet.com!cam-news-hub1.bbnplanet.com!uunet!in3.uu.net!206.66.12.35!news-in.iadfw.net!newshost.cyberramp.net!not-for-mail
From: [e-mail] ()
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: NBFM modulator: newbee help: what is de-emphasis exactly?
Date: Thu, 05 Dec 1996 05:34:01 GMT
Organization: CyberRamp.net, Dallas, TX [phone]/[phone] for info
Lines: 41
Message-ID: <585fm7$gpe$[e-mail]>
References: <[e-mail]> <56f1bi$pp6$[e-mail]> <56iql6$[e-mail]> <57ivmd$[e-mail]> <585af4$[e-mail]>
NNTP-Posting-Host: dal-tsa2-p1-43.cyberramp.net
X-Newsreader: Forte Free Agent v0.55

[e-mail] (Mike McCarty) wrote:

>In article <57ivmd$[e-mail]>,
>John Lundgren <[e-mail]> wrote:
>)Mike McCarty ([e-mail]) wrote:
>): In article <56f1bi$pp6$[e-mail]>,
>): tyler <[e-mail]> wrote:
>): )
>): )>>The standard varactor FM modulator does not inherently add pre-emphasis
,
>): )>>so an external pre-emphasis network is used to allow PM and FM radios
>): )
>): )Being relatively new to this NG, what is pre-and de-emphasis exactly?  I
know
>): )it's used in FM communications, but how and why?  Why is it needed?
>)
>): It is a noise-reduction scheme. Most of the noise in FM systems is what
>): might be termed "high frequency" or "hiss" (similar to tape). So the
>): high frequencies are "pre-emphasized" (i.e. get more gain than the lower
>): frequencies). Then when played back, the high frequencies are
>): "de-emphasized" (get lower gain). This raises the overall signal/noise
>): ratio.
>)
Partially correct. And a common misrepresentation of why emphasis is
used in FM systems.

The output of an FM detector has the characteristic curve of a
high-pass filter. That is to say an FM det. has higher noise output
with increasing frequency. - In it's detection bandwidth.
So a "de emphasis" filter is added to it;s output to flatten the noise
response.
This requires a pre-emphasis ckt at the transmitter.
So the main point is that Pre-emphasis is _required_ by the use of
De-emphasis in FM detectors.

When the pre and de are combined, the result is a flat freq. response.

I would like to see info on the effect of modulation index/sideband
energy, due to the pre-emphasis filter.

...Bryan




From [e-mail] Wed Dec 11 20:10:46 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!feed1.news.erols.com!news.bbnplanet.com!cpk-news-hub1.bbnplanet.com!newsfeed.internetmci.com!news.nidlink.com!usenet
From: [e-mail] (Bad  Dog)
Newsgroups: rec.radio.amateur.homebrew
Subject: Need a Relay & a Pllace 2 Get 1 !
Date: 11 Dec 1996 01:57:46 GMT
Organization: Radiowave Connection
Lines: 16
Message-ID: <58l4eq$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: pm5-1.nidlink.com
Mime-Version: 1.0
Content-Type: Text/Plain; charset=US-ASCII
X-Newsreader: WinVN 0.99.7

Help I need a Relay !!!   I own this older 10 meter/6 meter amplifier
(AfterBurner  Model# 403) and it has been in the closet for a few years
so I
took it apart and thought I should clean the relay (it looked kinda
dirty)
Well, after the file treatment things don't seem to be as flat as they
should and now the realy shoots sparks when you key up. So know I went
on
this search in the net and can't find nothing about a Relay. I even
check
all the parts catalogs I have and nobody has a simple Relay. Can
Anybody out
there help me find the right parts people? If so please help me I need
a
Relay and I need a new parts catalog  Thanx :)



From [e-mail] Wed Dec 11 20:10:46 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-200.sprintlink.net!tezcat!cam-news-hub1.bbnplanet.com!news.bbnplanet.com!cpk-news-hub1.bbnplanet.com!feed1.news.erols.com!worldnet.att.net!newsadm
From: woody white <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Need a Relay & a Pllace 2 Get 1 !
Date: Wed, 11 Dec 1996 03:24:32 -0800
Organization: http://www.geocities.com/capecanaveral/3722
Lines: 14
Message-ID: <[e-mail]>
References: <58l4eq$[e-mail]>
NNTP-Posting-Host: 207.146.226.110
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 2.01E (Win16; I)

Bad Dog wrote:
>
> Help I need a Relay !!!   ...snip...

A hamfest is the most eonomical, but you might try Newark Electronics,
Chicago, IL or Allied Electronics @ 800 433-5003 (www site:
allied.avnet.com)
--
de  Woody (WB4QXE) -  [e-mail]
Electron Microscopist/Microanalysist,
Ham radio "homebrewer", shade tree mechanic,
'90 Nissan 240SX, wish still had my Mcycle too!
http://www.geocities.com/capecanaveral/3722
.


From [e-mail] Wed Dec 11 20:10:48 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 20:10:50 1996
Message-ID: <[e-mail]>
Date: Sun, 08 Dec 1996 21:22:31 +0000
From: "Richard F. Gillette" <[e-mail]>
Reply-To: [e-mail]
Organization: RF gillette inc.
X-Mailer: Mozilla 3.0 (Win16; I)
MIME-Version: 1.0
Newsgroups: rec.radio.amateur.homebrew
To: "L.PAGE" <[e-mail]>
Subject: Re: NEED CASH $$$
References: <01bbe492$742599c0$6b09f880@UIC>
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
NNTP-Posting-Host: max06-228.starnetinc.com
Lines: 15
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!in2.uu.net!204.178.185.19!news1.starnetinc.com!max06-228.starnetinc.com

What do you want us to send you when you are in JAIL?

This pyramid con game is illegal in Illinois, and many other states.

Check with the U of Chicago it is also against their policy.

The reason is simple, the people at the bottom of the pyramid get taken,
i.e. there are not enough people to equal n^5!

Cook County Jail is the last place I would like to spend Christmas!

--
Richard F. Gillette PE, W9PE  Board Member, Harper C.C.   \\////
RF gillette inc. PO Box 1605, Palatine, IL 60078-1605     ( OO )
[e-mail], v)847-526-2626, f)847-526-2944 oo00=={}==00oo=


From [e-mail] Wed Dec 11 20:10:50 1996
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!www.nntp.primenet.com!nntp.primenet.com!news.mindspring.com!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.homebrew
Subject: need feedthru caps
Date: 7 Dec 1996 15:09:28 GMT
Organization: AOL http://www.aol.com
Lines: 9
Message-ID: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

Anyone have a double handfull of the old feedthru caps? The kind that have
a 1/4-28 threaded shank, a wire going straight thru the body, and
something like a 3/8 x 1/4 hex head on the outside containing 500-1000 pF
of decoupling capacitor?

Probably can find them at my next hamfest, but that's couple months off
and this project isn't.

W4ZCB


From [e-mail] Wed Dec 11 20:10:51 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!panix!arclight.uoregon.edu!enews.sgi.com!news.sgi.com!iag.net!news.utelfla.com!news.CT.NET!usenet
From: [e-mail] (eon Wiltsey)
Newsgroups: rec.radio.amateur.homebrew
Subject: need help
Date: 8 Dec 1996 18:59:58 GMT
Organization: CT.NET
Lines: 5
Message-ID: <58f37e$[e-mail]>
NNTP-Posting-Host: pm03_21.ct.net
X-Newsreader: WinVN 0.92.6

Need rca tube manual 1945 thru 70's.
will pay any reasonable plus shipping
am in cental.FL.
call 941 371 37 39 collect
Email leeboo@ ct.net


From [e-mail] Wed Dec 11 20:10:52 1996
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]
Newsgroups: rec.radio.amateur.homebrew
Subject: Need HF Amp Schematic(s)
Date: Sun, 08 Dec 1996 17:53:00 GMT
Organization: N/A
Lines: 6
Message-ID: <58f9pb$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: ip86.los-angeles4.ca.interramp.com
X-Server-Date: 8 Dec 1996 20:51:55 GMT
X-Newsreader: Forte Free Agent 1.0.82

I need diagrams for HF amps, (20 meters), please tell me where I can
get them.

Thanks,
Scott, KF6FCN



From [e-mail] Wed Dec 11 20:10:53 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!news.ultranet.com!news-out.communique.net!demos!news.stealth.net!news.idt.net!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.homebrew
Subject: Need Info on 6146 and 4cx250 RF Amplifier
Date: 3 Dec 1996 22:52:03 GMT
Organization: AOL http://www.aol.com
Lines: 16
Message-ID: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]



    Hello all, Thanks for your time, I'm interested in building a couple
of Different RF Power Amps, I need Construction Info/Schematics for An
amplifier using 1 or more 6146 tubes operational 6 through 12 meters, I
would also like to construct the same using A single 4CX250B, then when I
finish these I would like to Build a Multi Tube unit using 4CX250B's or
one of its slightly larger brothers.  I would be willing to pay for any of
the above info.  If you have any parts you think may be usable in the
above projects let me know!  Thanks and 73.

Rob Long
N7711 State Hwy 52
Lily, Wi 54491

Email to :[e-mail]


From [e-mail] Wed Dec 11 20:10:54 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.bbnplanet.com!cam-news-hub1.bbnplanet.com!cam-news-feed5.bbnplanet.com!cass.ma02.bull.com!steamer.clam.com!newsie.dmc.com!usenet
From: [e-mail] (Tom Sefranek)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Need Info on 6146 and 4cx250 RF Amplifier
Date: Wed, 04 Dec 1996 00:34:56 GMT
Organization: cmcorp.com
Lines: 23
Message-ID: <582h0g$[e-mail]>
References: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: tcs.cmcorp.com
X-Newsreader: Forte Free Agent 1.0.82

[e-mail] wrote:



>    Hello all, Thanks for your time, I'm interested in building a couple
>of Different RF Power Amps, I need Construction Info/Schematics for An
>amplifier using 1 or more 6146 tubes operational 6 through 12 meters, I
>would also like to construct the same using A single 4CX250B, then when I
>finish these I would like to Build a Multi Tube unit using 4CX250B's or
>one of its slightly larger brothers.  I would be willing to pay for any of
>the above info.  If you have any parts you think may be usable in the
>above projects let me know!  Thanks and 73.

Callsign?


>Rob Long
>N7711 State Hwy 52
>Lily, Wi 54491

>Email to :[e-mail]




From [e-mail] Wed Dec 11 20:10:55 1996
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!news-out.communique.net!mr.net!news.mid.net!newsfeeder.gi.net!news.dra.com!feed1.news.erols.com!howland.erols.net!EU.net!usenet2.news.uk.psi.net!uknet!usenet1.news.uk.psi.net!uknet!uknet!lyra.csx.cam.ac.uk!warwick!ral!usenet
From: Mike Willis <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Need Info on 6146 and 4cx250 RF Amplifier
Date: Thu, 05 Dec 1996 08:16:39 +0000
Organization: Rutherford Appleton Laboratory, Oxon, UK
Lines: 22
Message-ID: <[e-mail]>
References: <[e-mail]> <582h0g$[e-mail]> <[e-mail]>
NNTP-Posting-Host: bradman.te.rl.ac.uk
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.0Gold (Win95; I)

Gary Danaher wrote:
>
Snip
> >
> > Callsign?
> >
> > >Rob Long
> > >N7711 State Hwy 52
> > >Lily, Wi 54491
> >
> > >Email to :[e-mail]
>
> Regretably a check of the license data base fails to locate this
> individual, so I have to presume that he is unlicensed, and seeking
> information for an 11 meter amp. Suggest to all to ignore further
> requests for information.
> Gary
> ab5rm

How do you know he does not want to make a high power ISM
amplifier? E.g. for PVC welding, RF heating, EMC testing etc.
You don't do you? Never presume anything.


From [e-mail] Wed Dec 11 20:10:56 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!news.bbnplanet.com!su-news-hub1.bbnplanet.com!newsfeed.internetmci.com!in3.uu.net!206.149.24.18!excalibur.flash.net!not-for-mail
From: Gary Danaher <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Need Info on 6146 and 4cx250 RF Amplifier
Date: Wed, 04 Dec 1996 17:57:50 -0600
Organization: Flashnet Communications, http://www.flash.net
Lines: 27
Message-ID: <[e-mail]>
References: <[e-mail]> <582h0g$[e-mail]>
NNTP-Posting-Host: iasc2-127.flash.net
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
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X-Mailer: Mozilla 3.01 (Macintosh; I; PPC)

Tom Sefranek wrote:
>
> [e-mail] wrote:
>
> >    Hello all, Thanks for your time, I'm interested in building a couple
> >of Different RF Power Amps, I need Construction Info/Schematics for An
> >amplifier using 1 or more 6146 tubes operational 6 through 12 meters, I
> >would also like to construct the same using A single 4CX250B, then when I
> >finish these I would like to Build a Multi Tube unit using 4CX250B's or
> >one of its slightly larger brothers.  I would be willing to pay for any of
> >the above info.  If you have any parts you think may be usable in the
> >above projects let me know!  Thanks and 73.
>
> Callsign?
>
> >Rob Long
> >N7711 State Hwy 52
> >Lily, Wi 54491
>
> >Email to :[e-mail]

Regretably a check of the license data base fails to locate this
individual, so I have to presume that he is unlicensed, and seeking
information for an 11 meter amp. Suggest to all to ignore further
requests for information.
Gary
ab5rm


From [e-mail] Wed Dec 11 20:10:59 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!newsfeed.internetmci.com!news.internetMCI.com!news-admin
From: Stan Aughenbaugh <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Need Info on 6146 and 4cx250 RF Amplifier
Date: Wed, 04 Dec 1996 17:19:47 -0700
Organization: Computer Horizons Corp. Consultant
Lines: 35
Message-ID: <[e-mail]>
References: <[e-mail]> <582h0g$[e-mail]> <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: 166.41.60.108
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.0 (WinNT; I)

Gary Danaher wrote:
>
> Tom Sefranek wrote:
> >
> > [e-mail] wrote:
> >
> > >    Hello all, Thanks for your time, I'm interested in building a couple
> > >of Different RF Power Amps, I need Construction Info/Schematics for An
> > >amplifier using 1 or more 6146 tubes operational 6 through 12 meters, I
> > >would also like to construct the same using A single 4CX250B, then when I
> > >finish these I would like to Build a Multi Tube unit using 4CX250B's or
> > >one of its slightly larger brothers.  I would be willing to pay for any o
f
> > >the above info.  If you have any parts you think may be usable in the
> > >above projects let me know!  Thanks and 73.
> >
> > Callsign?
> >
> > >Rob Long
> > >N7711 State Hwy 52
> > >Lily, Wi 54491
> >
> > >Email to :[e-mail]
>
> Regretably a check of the license data base fails to locate this
> individual, so I have to presume that he is unlicensed, and seeking
> information for an 11 meter amp. Suggest to all to ignore further
> requests for information.
> Gary
> ab5rm

Another goddam self righteous self appointed band cop!
I am sooooo tired of people trying to mind other people's business.
--
Stan KF0NC
"90% of all statistics are made up"


From [e-mail] Wed Dec 11 20:11:00 1996
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!zombie.ncsc.mil!admaix.sunydutchess.edu!news.acsu.buffalo.edu!news.uoregon.edu!hunter.premier.net!news.nl.innet.net!INnl.net!feed1.news.erols.com!dciteleport.com!www.nntp.primenet.com!nntp.primenet.com!news.bbnplanet.com!su-news-hub1.bbnplanet.com!news.pbi.net!news.PBI.net!mothra.westworld.com!alex-b3.ptw.com
From: Jay <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Need Info on 6146 and 4cx250 RF Amplifier
Date: 5 Dec 96 23:23:11 GMT
Organization: http://www.ptw.com
Lines: 26
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: mothra.westworld.com
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 1.22 (Windows; I; 16bit)
To: [e-mail]

[e-mail] wrote:
>
>
>    Hello all, Thanks for your time, I'm interested in building a couple
>of Different RF Power Amps, I need Construction Info/Schematics for An
>amplifier using 1 or more 6146 tubes operational 6 through 12 meters, I
>would also like to construct the same using A single 4CX250B, then when I
>finish these I would like to Build a Multi Tube unit using 4CX250B's or
>one of its slightly larger brothers.  I would be willing to pay for any of
>the above info.  If you have any parts you think may be usable in the
>above projects let me know!  Thanks and 73.
>
>Rob Long
>N7711 State Hwy 52
>Lily, Wi 54491
>
>Email to :[e-mail]

Hello Rob:  I will be happy to send you a copy of a HF Linear Amplifier,
using both a 6146 and 4CX250 type of tubes.

73's and Happy Holidays, and God Bless.

Jay  at  jay123aptw.com




From [e-mail] Wed Dec 11 20:11:01 1996
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!usenet.eel.ufl.edu!arclight.uoregon.edu!news.sprintlink.net!news-peer.sprintlink.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.homebrew
Subject: Re: Need Info on 6146 and 4cx250 RF Amplifier
Date: 6 Dec 1996 20:58:33 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]
X-Newsreader: AOL Offline Reader

In article <[e-mail]>, Allan Dobler
<[e-mail]> writes:

>Isn't a CB'er that builds a homebrew amp, a better hobbiest than a 2M
>appliance operator who buys gear at Radio Shack???
>73
>Allan

I guess it depends on what is meant by "better". Are you confusing
"better" with  "technically more skilled"?

Is a unlicensed driver who builds his own car and drives 100 MPH  in
school zones a better driver than one who just buys a car and follows the
law?

If the guy runs the PA into dummy loads, and is only trying to learn, he
definately is the better hobbiest. Of course, that is unlikely.

If he uses the PA on CB, or worse yet sells them or uses them on ten
meters (without a license) or commercial frequencies, helping him is
idiotic. This seems more likely.

73 Tom


From [e-mail] Wed Dec 11 20:11:02 1996
Path: news1.epix.net!news3.epix.net!uunet!in3.uu.net!206.229.87.25!news.sprintlink.net!news-peer.sprintlink.net!su-news-hub1.bbnplanet.com!news.bbnplanet.com!cpk-news-hub1.bbnplanet.com!newsfeed.internetmci.com!news.internetMCI.com!news-admin
From: Stan Aughenbaugh <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Need Info on 6146 and 4cx250 RF Amplifier
Date: Thu, 05 Dec 1996 15:58:16 -0700
Organization: Computer Horizons Corp. Consultant
Lines: 28
Message-ID: <[e-mail]>
References: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: 166.41.60.108
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.0 (WinNT; I)

[e-mail] wrote:
>
>     Hello all, Thanks for your time, I'm interested in building a couple
> of Different RF Power Amps, I need Construction Info/Schematics for An
> amplifier using 1 or more 6146 tubes operational 6 through 12 meters, I
> would also like to construct the same using A single 4CX250B, then when I
> finish these I would like to Build a Multi Tube unit using 4CX250B's or
> one of its slightly larger brothers.  I would be willing to pay for any of
> the above info.  If you have any parts you think may be usable in the
> above projects let me know!  Thanks and 73.
>
> Rob Long
> N7711 State Hwy 52
> Lily, Wi 54491
>
> Email to :[e-mail]


Forgot your question had never been answered in the flurry with the
"Band Nazi's" I'd check with the Amateur Radio Handbook preferable an
older edition, none of the circuitry is complex on paper, but sometimes
the practice is. Last I saw, there were several amplifiers along the
lines of what you talk about. Might even make good toasters..heh heh.

--
Stan
Amateur Radio KF0NC
"90% of all statistics are made up"


From [e-mail] Wed Dec 11 20:11:03 1996
Path: news1.epix.net!news3.epix.net!uunet!in1.uu.net!199.94.215.18!cam-news-hub1.bbnplanet.com!news.bbnplanet.com!su-news-hub1.bbnplanet.com!news.pbi.net!news.PBI.net!mothra.westworld.com!alex-b3.ptw.com
From: Jay <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Need Info on 6146 and 4cx250 RF Amplifier
Date: 5 Dec 96 23:22:49 GMT
Organization: http://www.ptw.com
Lines: 26
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: mothra.westworld.com
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 1.22 (Windows; I; 16bit)
To: [e-mail]

[e-mail] wrote:
>
>
>    Hello all, Thanks for your time, I'm interested in building a couple
>of Different RF Power Amps, I need Construction Info/Schematics for An
>amplifier using 1 or more 6146 tubes operational 6 through 12 meters, I
>would also like to construct the same using A single 4CX250B, then when I
>finish these I would like to Build a Multi Tube unit using 4CX250B's or
>one of its slightly larger brothers.  I would be willing to pay for any of
>the above info.  If you have any parts you think may be usable in the
>above projects let me know!  Thanks and 73.
>
>Rob Long
>N7711 State Hwy 52
>Lily, Wi 54491
>
>Email to :[e-mail]

Hello Rob:  I will be happy to send you a copy of a HF Linear Amplifier,
using both a 6146 and 4CX250 type of tubes.

73's and Happy Holidays, and God Bless.

Jay  at  jay123aptw.com




From [e-mail] Wed Dec 11 20:11:04 1996
Path: news1.epix.net!news3.epix.net!uunet!in3.uu.net!205.252.116.190!feed1.news.erols.com!arclight.uoregon.edu!news.bc.net!news.insinc.net!news.cadvision.com!usenet
From: Allan Dobler <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Need Info on 6146 and 4cx250 RF Amplifier
Date: Thu, 05 Dec 1996 21:25:54 -0800
Organization: CADVision Development Corp.
Lines: 24
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
NNTP-Posting-Host: agtb252.cadvision.com
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.0 (Win16; I)

Jay wrote:
>
> [e-mail] wrote:
> >
> >
> >    Hello all, Thanks for your time, I'm interested in building a couple
> >of Different RF Power Amps, I need Construction Info/Schematics for An
> >amplifier using 1 or more 6146 tubes operational 6 through 12 meters, I
> >would also like to construct the same using A single 4CX250B, then when I
> >finish these I would like to Build a Multi Tube unit using 4CX250B's or
> >one of its slightly larger brothers.  I would be willing to pay for any of
> >the above info.  If you have any parts you think may be usable in the
> >above projects let me know!  Thanks and 73.

Isn't a CB'er that builds a homebrew amp, a better hobbiest than a 2M
appliance operator who buys gear at Radio Shack???

73

Allan

VE6AQK@VE6YYC.#SAB.AB.CA

[e-mail]


From [e-mail] Wed Dec 11 20:11:05 1996
Path: news1.epix.net!news3.epix.net!uunet!in3.uu.net!206.229.87.25!news.sprintlink.net!news-peer.sprintlink.net!howland.erols.net!swrinde!sdd.hp.com!col.hp.com!jms
From: [e-mail] (Mike Stansberry)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Need Info on 6146 and 4cx250 RF Amplifier
Date: 6 Dec 1996 13:17:20 GMT
Organization: HP Colorado Springs Division
Lines: 7
Message-ID: <5896d0$[e-mail]>
References: <[e-mail]> <[e-mail]> <[e-mail]>
NNTP-Posting-Host: mssjms.col.hp.com
X-Newsreader: TIN [version 1.2 PL2]

Allan Dobler ([e-mail]) wrote:

: Isn't a CB'er that builds a homebrew amp, a better hobbiest than a 2M
: appliance operator who buys gear at Radio Shack???

No



From [e-mail] Wed Dec 11 20:11:06 1996
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!data.ramona.vix.com!news1.digital.com!news.bbnplanet.com!su-news-hub1.bbnplanet.com!arclight.uoregon.edu!news.bc.net!news.insinc.net!news.cadvision.com!usenet
From: Allan Dobler <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Need Info on 6146 and 4cx250 RF Amplifier
Date: Sat, 07 Dec 1996 17:52:47 -0800
Organization: CADVision Development Corp.
Lines: 40
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
NNTP-Posting-Host: agtc202.cadvision.com
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.0 (Win16; I)

[e-mail] wrote:
>
> In article <[e-mail]>, Allan Dobler
> <[e-mail]> writes:
>
> >Isn't a CB'er that builds a homebrew amp, a better hobbiest than a 2M
> >appliance operator who buys gear at Radio Shack???
> >73
> >Allan
>
> I guess it depends on what is meant by "better". Are you confusing
> "better" with  "technically more skilled"?
>
> Is a unlicensed driver who builds his own car and drives 100 MPH  in
> school zones a better driver than one who just buys a car and follows the
> law?
>
> If the guy runs the PA into dummy loads, and is only trying to learn, he
> definately is the better hobbiest. Of course, that is unlikely.
>
> If he uses the PA on CB, or worse yet sells them or uses them on ten
> meters (without a license) or commercial frequencies, helping him is
> idiotic. This seems more likely.
>
> 73 Tom

You are right Tom, I suppose the point I was making was that the true
spirit of Ham radio has been lost in recent years.
--
73

Allan

VE6AQK@VE6YYC.#SAB.AB.CA

[e-mail]


You should always be aware that statistics can be manipulated...
84% of people already know that!


From [e-mail] Wed Dec 11 20:11:07 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.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.homebrew
Subject: Re: Need Info on 6146 and 4cx250 RF Amplifier
Date: 7 Dec 1996 19:20:09 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] writes:

>    Unlike Some Amateur Radio operators I will do my best to create
>interest and enthusiasm for Amateur Radio!  If someone asks me for Help,
I
>will help.
>
>
>   73, all, God Bless, And hope you ALL have a good Holiday season!
>
>   Rob.......

Hi Rob,

In all that yelling I missed your call sign. What was it again?

73 Tom


From [e-mail] Wed Dec 11 20:11:08 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!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.homebrew
Subject: Re: Need Info on 6146 and 4cx250 RF Amplifier
Date: 8 Dec 1996 18:25:01 GMT
Organization: AOL http://www.aol.com
Lines: 17
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]>, Allan Dobler
<[e-mail]> writes:

>
>You are right Tom, I suppose the point I was making was that the true
>spirit of Ham radio has been lost in recent years.
>--
>73
>
>Allan

A better topic might be why some CB'ers build things and while some Hams
don't.

What has ruined our ambition to learn?

73 Tom


From [e-mail] Wed Dec 11 20:11:08 1996
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!zombie.ncsc.mil!nntp.coast.net!howland.erols.net!cs.utexas.edu!geraldo.cc.utexas.edu!usenet
From: Richard Friedrich <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: need info or design on two channel telemetry system
Date: Fri, 06 Dec 1996 02:08:26 -0600
Organization: Univ of Texas at Austin
Lines: 10
Message-ID: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: slip-86-15.ots.utexas.edu
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.0Gold (Win95; I)

I need a two channel telemetry system. The system needs to update itself
1 to 10 times per second. power out put is 50 to 100mw. 49 mhz is OK.
0 to 5v input.

any ideas out there?

thanks


richard wd5hrp


From [e-mail] Wed Dec 11 20:11:09 1996
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!uunet!in3.uu.net!204.248.93.100!news.accessus.net!news
From: [e-mail] (Dale Wentz)
Newsgroups: rec.radio.amateur.homebrew
Subject: Need software for AVOCET Eprom Programer
Date: 8 Dec 1996 00:30:53 GMT
Organization: Midwest Computer Services
Lines: 10
Message-ID: <58d27t$[e-mail]>
NNTP-Posting-Host: bville-pm2-1-46.accessus.net
Mime-Version: 1.0
Content-Type: Text/Plain; charset=US-ASCII
X-Newsreader: WinVN 0.99.8 (x86 32bit)

We have a AVOCET eprom program, and am looking for software for it.

If anyone owns one please contact me, the unit has 10 zif sockets on it, and
includes a ISA interface board.


Thanks

KB9JJA/Dale



From [e-mail] Wed Dec 11 20:11:10 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!howland.erols.net!news.sprintlink.net!news-peer.sprintlink.net!news.sprintlink.net!news-hub.sprintlink.net!news.sprintlink.net!news-pen-16.sprintlink.net!news.utelfla.com!news.CT.NET!usenet
From: [e-mail] (eon Wiltsey)
Newsgroups: rec.radio.amateur.homebrew
Subject: need tube meaual
Date: 3 Dec 1996 21:19:21 GMT
Organization: CT.NET
Lines: 2
Message-ID: <5825gp$[e-mail]>
NNTP-Posting-Host: pm01_15.ct.net
X-Newsreader: WinVN 0.92.6

Will buy old rca tube manuals.
need them for homebuilt projects,help help.help


From [e-mail] Wed Dec 11 20:11:11 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!news.sprintlink.net!news-peer.sprintlink.net!news.sprintlink.net!news-hub.sprintlink.net!news.sprintlink.net!news-dc-10.sprintlink.net!news.connect.net!usenet
From: [e-mail] (Phil Clements)
Newsgroups: rec.radio.amateur.homebrew
Subject: Need: Address for Hi-Q Capacitor Co.
Date: 4 Dec 1996 04:05:22 GMT
Organization: Your Organization
Lines: 5
Message-ID: <582ta2$[e-mail]>
NNTP-Posting-Host: a2p14.connect.net
X-Newsreader: WinVN 0.92.1

Does someone have the address or tel. # for Hi-Q?
I need the data on one of their caps.

Thanks,
Phil, K5PC


From [e-mail] Wed Dec 11 20:11:12 1996
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!bigboote.WPI.EDU!cam-news-feed2.bbnplanet.com!news.bbnplanet.com!cam-news-hub1.bbnplanet.com!www.nntp.primenet.com!nntp.primenet.com!uwm.edu!newsspool.doit.wisc.edu!news.doit.wisc.edu!news
From: [e-mail] (Melissa & Jim)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Need: Address for Hi-Q Capacitor Co.
Date: Fri, 06 Dec 1996 00:24:39 GMT
Organization: University of Wisconsin, System Administration
Lines: 15
Message-ID: <587p9f$[e-mail]>
References: <582ta2$[e-mail]>
NNTP-Posting-Host: f180-143.net.wisc.edu
X-Newsreader: Forte Free Agent 1.0.82

[e-mail] (Phil Clements) wrote:

>Does someone have the address or tel. # for Hi-Q?
>I need the data on one of their caps.

Weren't the Hi-Q caps made by Sprague?

Jim
   ---------------------------------------------------------------------
       Melissa Kepner                                    Jim Adney
       [e-mail]              [e-mail]
                             Laura Kepner-Adney
                             Madison, Wisconsin
   ---------------------------------------------------------------------



From [e-mail] Wed Dec 11 20:11:13 1996
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!zombie.ncsc.mil!newsgate.duke.edu!agate!howland.erols.net!www.nntp.primenet.com!nntp.primenet.com!ix.netcom.com!news
From: "Tom C." <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: needed:reference article on FM generation via "dual modulus prescaler".
Date: Fri, 06 Dec 1996 08:15:51 -0800
Organization: Netcom
Lines: 10
Message-ID: <[e-mail]>
NNTP-Posting-Host: sjx-ca22-02.ix.netcom.com
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-NETCOM-Date: Fri Dec 06 10:14:45 AM CST 1996
X-Mailer: Mozilla 3.0 (Win95; U)

I am attempting to do an FM modulation of digital data. There is a
method to do this that involves the use of dual modulus prescalers but I
have no references on it. I have been told that the original work on
this method was done by Motorola and that they have an app note
somewhere that describes it. Does anyone know where I can find it?


Thanks

Tom


From [e-mail] Wed Dec 11 20:11:13 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.net!news.ibm.net.il!arclight.uoregon.edu!news.sprintlink.net!news-peer.sprintlink.net!cs.utexas.edu!news.tamu.edu!news.utdallas.edu!nrchh45.rich.nt.com!bcarh189.bnr.ca!bcarh8ac.bnr.ca!nrtphc11.bnr.ca!nntpm365.plaza.nt.com!user
From: [e-mail] (John Marshall)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: NorCal Cascade - Where to Buy?
Date: 2 Dec 1996 17:53:52 GMT
Organization: Broadband Networks Customer Service
Lines: 11
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: 47.255.36.6

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

> Can anyone tell me where one can buy the NorCal Cascade
> QRP kit - and for how much?  I can't seem to find a listing
> anywhere.

Wilderness Radio
P.O. Box 734
Los Altos, CA 94023-0734
[phone]
<http://www.fix.net/jparker/wild.html>


From [e-mail] Wed Dec 11 20:11:15 1996
Newsgroups: rec.radio.amateur.homebrew
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!news.sgi.com!enews.sgi.com!ix.netcom.com!netcom.com!netcom18.netcom.com!faunt
From: [e-mail] (Doug Faunt N6TQS [phone])
Subject: Re: NorCal Cascade - Where to Buy?
In-Reply-To: [e-mail]'s message of 2 Dec 1996 17:53:52 GMT
Message-ID: <[e-mail]>
Sender: [e-mail]
Organization: at home, in Oakland
References: <[e-mail]>
        <[e-mail]>
Date: Wed, 4 Dec 1996 20:34:22 GMT
Lines: 24

Err, Wilderness doesn't do the Cascade, just the Sierra and -40A.  If
you're looking for a SSB rig, the new White Mountain rig from NN1G
looks very nice, although it's 75M or 20M only, no band changing.
Very solid case, built in CW frequency "display", $100. for the board
w/ parts, $60 more for case and case mounted parts.

The Cascades are all sold out from NorCal.
73, doug

   From: [e-mail] (John Marshall)
   Newsgroups: rec.radio.amateur.homebrew
   Date: 2 Dec 1996 17:53:52 GMT

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

   > Can anyone tell me where one can buy the NorCal Cascade
   > QRP kit - and for how much?  I can't seem to find a listing
   > anywhere.

   Wilderness Radio
   P.O. Box 734
   Los Altos, CA 94023-0734
   [phone]
   <http://www.fix.net/jparker/wild.html>


From [e-mail] Wed Dec 11 20:11:15 1996
Path: news1.epix.net!news3.epix.net!uunet!in3.uu.net!171.69.2.138!usenet.cisco.com!pchow
From: [e-mail] (Peter Chow)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: NorCal Cascade - Where to Buy?
Date: 6 Dec 1996 01:37:57 GMT
Organization: cisco Systems, Incorporated
Lines: 33
Message-ID: <587tdl$[e-mail]>
References: <[e-mail]> <[e-mail]>
NNTP-Posting-Host: mb.cisco.com
X-Newsreader: TIN [version 1.2 PL2]

Post something on the QRP-L. I remembered there is a gentleman I met during
last NorCal meeting told me that he wants to sell his unbuild kit. Good luck.


73,
KQ6JH


Doug Faunt N6TQS [phone] ([e-mail]) wrote:
: Err, Wilderness doesn't do the Cascade, just the Sierra and -40A.  If
: you're looking for a SSB rig, the new White Mountain rig from NN1G
: looks very nice, although it's 75M or 20M only, no band changing.
: Very solid case, built in CW frequency "display", $100. for the board
: w/ parts, $60 more for case and case mounted parts.

: The Cascades are all sold out from NorCal.
: 73, doug

:    From: [e-mail] (John Marshall)
:    Newsgroups: rec.radio.amateur.homebrew
:    Date: 2 Dec 1996 17:53:52 GMT

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

:    > Can anyone tell me where one can buy the NorCal Cascade
:    > QRP kit - and for how much?  I can't seem to find a listing
:    > anywhere.

:    Wilderness Radio
:    P.O. Box 734
:    Los Altos, CA 94023-0734
:    [phone]
:    <http://www.fix.net/jparker/wild.html>


From [e-mail] Wed Dec 11 20:11:16 1996
Path: news1.epix.net!news3.epix.net!uunet!in1.uu.net!205.252.116.190!feed1.news.erols.com!news
From: [e-mail] (Michael Horowitz)
Newsgroups: rec.radio.amateur.homebrew
Subject: O'Scope - HOw to ....
Date: Wed, 04 Dec 1996 14:23:51 GMT
Organization: Erol's Internet Services
Lines: 6
Message-ID: <583n0l$[e-mail]>
NNTP-Posting-Host: spg-as15s22.erols.com
X-Newsreader: Forte Free Agent 1.0.82

Folks - I'm trying to look at the video coming out my VCR.
I got a 'scope, set input to AC, internal trigger, low voltage range,
high sweep rate. Don't see anything that might be lines of video.
Do I need a special proble?
Any suggestions? TIA - Mike



From [e-mail] Wed Dec 11 20:11:17 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!208.202.14.37!news.icanect.net!usenet
From: [e-mail] (Terry Simonds)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: O'Scope - HOw to ....
Date: Wed, 04 Dec 1996 17:05:20 GMT
Organization: Icanect
Lines: 17
Message-ID: <584au2$[e-mail]>
References: <583n0l$[e-mail]>
NNTP-Posting-Host: 206.142.162.99
X-Newsreader: Forte Free Agent 1.0.82

[e-mail] (Michael Horowitz) wrote:

->Folks - I'm trying to look at the video coming out my VCR.
->I got a 'scope, set input to AC, internal trigger, low voltage
range,
->high sweep rate. Don't see anything that might be lines of video.
->Do I need a special proble?
->Any suggestions? TIA - Mike

I think what you're looking at is RF (channel 3 or 4), for which
you'll need some sort of demodulator probe to view the video
modulation.


73--Terry/WB4FXD in Ft. Lauderdale, FL
[e-mail]



From [e-mail] Wed Dec 11 20:11:18 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!ddsw1!news.mcs.net!van-bc!news.rmii.com!newsjunkie.ans.net!newsfeeds.ans.net!interaccess!usenet
From: Robert Mansfield <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: O'Scope - HOw to ....
Date: Wed, 04 Dec 1996 23:36:32 -0600
Organization: InterAccess, Chicago's best Internet Service Provider
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To: Michael Horowitz <[e-mail]>

Michael Horowitz wrote:

 Folks - I'm trying to look at the video coming out my VCR.
 I got a 'scope, set input to AC, internal trigger, low voltage range,
 high sweep rate. Don't see anything that might be lines of video.
 Do I need a special proble?
 Any suggestions? TIA - Mike

A line of video is 63 usec. long so you should set your scope to 10
usec. per
div also set the input to DC, and start with the trigger very negative
and
bring it up until you get a lock (the negative sync pulse is the only
stable
part of the video signal that a scope can lock on to).

Bob Mansfield WA8USR


From [e-mail] Wed Dec 11 20:11:19 1996
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From: "Peter Gottlieb" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: O'Scope - HOw to ....
Date: 5 Dec 1996 23:50:33 GMT
Organization: Altopia Corp. - Affordable Usenet Access - http://www.alt.net
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Robert Mansfield <[e-mail]> wrote in article
<[e-mail]>...
> Michael Horowitz wrote:
>
>  Folks - I'm trying to look at the video coming out my VCR.
>  I got a 'scope, set input to AC, internal trigger, low voltage range,
>  high sweep rate. Don't see anything that might be lines of video.
>  Do I need a special proble?
>  Any suggestions? TIA - Mike
>
> A line of video is 63 usec. long so you should set your scope to 10
> usec. per
> div also set the input to DC, and start with the trigger very negative
> and
> bring it up until you get a lock (the negative sync pulse is the only
> stable
> part of the video signal that a scope can lock on to).
>
> Bob Mansfield WA8USR
>

Also note that a standard video signal is 1 Volt peak to peak when
terminated into
75 Ohms (unterminated should be 2 Volts P-P).

I hope he is looking at the VIDEO output and not the RF channel 3 output.

...Peter


From [e-mail] Wed Dec 11 20:11:20 1996
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From: [e-mail] (Wilbert Knol)
Newsgroups: rec.radio.amateur.homebrew
Subject: Online RF Power Valve specs? Where?
Date: Thu, 05 Dec 1996 23:09:23 GMT
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I am looking for data on CV1924 and QY4-250 (CV2131) valves. Absolute
max ratings and recommended operating paramaters. Is there an online
source of this data? The ARRL handbook gives some info on the second
valve, but it would be nice to have the factory specs.

I have scored a dozen new QY4-250's and have a 2nd hand amp with
2xCV1924 (parallel) sitting under my desk, and would like to double
check the operating values. The gear is needed for the Kiwi Contest
team at ZM2K. Checked out Rich Measures home page...excellent stuff.

Wilbert, ZL2BSJ
Would-be linear constructor




From [e-mail] Wed Dec 11 20:11:21 1996
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From: [e-mail] (Wes Stewart)
Newsgroups: rec.radio.amateur.homebrew
Subject: Parasitic Suppressor Q
Date: Sat, 7 Dec 1996 08:36:31 LOCAL
Organization: Starnet
Lines: 44
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I have tried to follow the raging discussion over the merits (or
non-merits)of parasitic suppressors constructed with nichrome wire. Frankly, i
t
has been tough to follow at times because the discussion has been cluttered
with other topics.  So, a new thread, dedicated to a single topic. (We live
in hope)

To date, I have seen no one present either modeled data or actual measured
data acquired using *appropriate* instrumentation.  I have had email
discussions with Rich Measures which lead me to believe that he will be send
some hardware my way which I will attempt to quantify using my Boonton 250 RX
meter.  This could be tough because of the low Q, but we shall see. If this
doesn't work out, I will report same.

Additionally, I have used both ARRL Radio Designer (ARD) and Mathcad to
try and model the effects of nichrome on parasitic suppressor Q.  To date, I
can come up with no "magic" properties for these suppressors.  This is not to
say that there are none.

One problem with nichrome (computationally speaking) is that it is a magnetic
material. In my limited searching of references, I haven't found a good value
for the relative permeability, which along with the resistivity affects
the skin effect losses of the wire.  However, unless this is non-linear (could

be), there is still seems to be no magic involved.

The higher resistivity and permeability of nichrome (whatever the values)
simply increase the skin effect losses in the same fashion as in copper or any

other conductor.

An inductor wound with nichrome has higher loss (lower Q) than a similar
inductor wound with copper, but in the parasitic suppressor, the parallel
resistor has the exact effect.  In other words, the series equivalent R+jX has

an equivalent parallel G-jB which can be made to look the same by addition
of external parallel conductance (resistor) to a higher Q copper wire
inductor.

The only positive effect I can imagine arising from the use of nichrome
suppressors would be due to some non-linear phenomenon that increases VHF loss

while not affecting HF loss.  If someone can point us to a reference which
describes this behavior it would be appreciated and might settle the arguement
.

Food for thought, respectfully submitted,

Wes -- N7WS



From [e-mail] Wed Dec 11 20:11:23 1996
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From: [e-mail] (R. L. Measures )
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Parasitic Suppressor Q
Date: Wed, 11 Dec 1996 02:12:10 -0800
Organization: Internet Access of Ventura County
Lines: 62
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References: <[e-mail]>
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In article <[e-mail]>, [e-mail] (Wes
Stewart) wrote:

> I have tried to follow the raging discussion over the merits (or
> non-merits)of parasitic suppressors constructed with nichrome wire.
Frankly, it
> has been tough to follow at times because the discussion has been cluttered
> with other topics.  So, a new thread, dedicated to a single topic. (We live
> in hope)
>
snip
>
> One problem with nichrome (computationally speaking) is that it is a magneti
c
> material. In my limited searching of references, I haven't found a good valu
e
> for the relative permeability, which along with the resistivity affects
> the skin effect losses of the wire.  However, unless this is non-linear
(could
> be), there is still seems to be no magic involved.

IMO, the magnetic characteristic is probably a factor at VHF.  By adding a
small amount of iron to the basic nickle-chromium 4 to 1 ratio, the
hysterisis-loss increases noticably at 50MHz.  It will be interesting to
see what happens above this frequency on your Boonton 250, Wes.
 Another issue is that there are two, different, anode VHF resonant
frequencies whenever a VHF parasitic suppressor is used.  The higher
resonant frequency is through the suppressor resistor, Rs (the lowest L
path through the suppressor).  The lower resonant frequency is through the
more-inductive suppressor inductor, Ls.  (Note: Rs and Ls act independantly
because the magnetic field from Ls is at a right angle to the magnetic
field from Rs,  Thus, a stagger-tuning effect is produced.)

> The higher resistivity and permeability of nichrome (whatever the values)
> simply increase the skin effect losses in the same fashion as in copper
or any
> other conductor.
>
> An inductor wound with nichrome has higher loss (lower Q) than a similar
> inductor wound with copper, but in the parasitic suppressor, the parallel
> resistor has the exact effect.  In other words, the series equivalent
R+jX has
> an equivalent parallel G-jB which can be made to look the same by addition
> of external parallel conductance (resistor) to a higher Q copper wire
> inductor.
>
> The only positive effect I can imagine arising from the use of nichrome
> suppressors would be due to some non-linear phenomenon that increases VHF
loss
> while not affecting HF loss.  If someone can point us to a reference which
> describes this behavior it would be appreciated and might settle the
arguement.

A nichrome Ls does increase HF loss by roughly one percent on the 28MHz
band.  Unsurprisingly, nichrome does exhibit heating during operation at
28MHz.  I would be concerned if this were NOT the case.
 About 30 years ago, an old timer told me that he built a ten meter antenna
with stainless steel screws, and that during operation the stainless steel
screws became so hot they melted the plexiglass insulators they were
screwed to.  (Most types of stainless steel are a mix of nickle, chromium,
and iron.)

--
--Rich-- ag6k, 805-386-3734


From [e-mail] Wed Dec 11 20:11:24 1996
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From: [e-mail] (Mustang Maniac)
Newsgroups: rec.radio.amateur.boatanchors,rec.radio.swap,rec.radio.amateur.homebrew,rec.radio.amateur.equipment
Subject: Parting out Heath SB-102 - need anything?
Date: 6 Dec 1996 13:59:42 GMT
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I am parting out a Heath SB-102 HF transceiver.  Do you need any parts
to repair your Heath rig?  Most of the electrical parts are the same in
the SB-100/101/102 and HW-100/101 rigs.

The following parts are NOT available, so don't ask:
- Meter (I do have one with a bad face and good movement, however)
- Plate and load capacitors (I'm using them in a HB 807 transmitter)
- Tubes
- Plate tank coil
- VFO dial (it was shattered already)
- CW filter (put it in another rig)
- Filter selecting lever knob (it was broken anyway)
- Crystals (all have been sold to other Heath owners)
- RCA jacks from rear panel
- Rubber drive belts (they were rotted)

The LMO works, but tuning was real scratchy, indicating either worn out
or dirty bearings on the tuning capacitor inside.

I do have nearly all of the internal parts still available.  The front
panel is not in great shape, but it's usable.  The markings are faded,
but the paint's not too bad.  The cabinet is dent-free and the paint
is in fair condition.  Good restoration candidate.

Email me with your parts needs.
--
Dean W. Hemphill                      Email: [e-mail]
PO Box 328                            Home:  [phone]
Lake Dallas, Texas 75065-0328         Work:  [phone]
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Amateur radio operator KC5NG, Extra Class, VE (ARRL/W5YI), QRPer, CW op
Ford Mustang enthusiast ('66 coupe, '69 GT-350, '72 conv, '95 GT conv)
Die-cast model car collector (Ford products only, in all scales)
Plastic model car builder (Ford products only, 1:24 and 1:25 scale)
Glass insulator collector (specializing in "oddball" pieces)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .



From [e-mail] Wed Dec 11 20:11:25 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: PIC Programmer Holiday Specials
Date: 10 Dec 96 22:08:32 -0600
Organization: The University of Memphis
Lines: 12
Message-ID: <[e-mail]>
NNTP-Posting-Host: tecvax.stim.tec.tn.us

Microchip has introduced an 8-pin microcontroller.  Check out these
PIC-related web pages.

www.microchip.com
www.parallaxinc.com
www.melabs.com

Regards,
Garry Spencer ([e-mail])

P.S. I know this is a bit off-topic for this newsgroup, but microcontrollers
are used in some ham gear.


From [e-mail] Wed Dec 11 20:11:26 1996
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From: [e-mail] (Tom Bruhns)
Newsgroups: misc.industry.electronics.marketplace,comp.robotics.misc,sci.electronics.design,sci.electronics.equipment,sci.electronics.misc,sci.electronics.basics,rec.radio.amateur.homebrew
Subject: Re: PIC Programmer Holiday Specials until 12/31/96!
Followup-To: misc.industry.electronics.marketplace,comp.robotics.misc,sci.electronics.design,sci.electronics.equipment,sci.electronics.misc,sci.electronics.basics,rec.radio.amateur.homebrew
Date: 10 Dec 1996 18:18:34 GMT
Organization: Hewlett Packard Corvallis Site
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ITU Technologies ([e-mail]) wrote:
:                              ITU'S HOLIDAY SALE!

followed by an unabashed advertisment.  I'm interested in any comments
folk may have on these products or other PIC programming bundles such
as the ones that DigiKey offers (Microchip "Picstart" and Parallax
PIC programmers).  I'm especially interested in knowing which of the
readily available, reasonably inexpensive ones offer the best
programming environments, and which work best with the smallest
available PICs.  And are there smaller PICs than the 18-pin SOIC
size in the DigiKey catalog?  What are the best hobby-type resources
for this processor line?

--
Cheers,
Tom
[e-mail]


From [e-mail] Wed Dec 11 20:11:28 1996
Newsgroups: misc.industry.electronics.marketplace,comp.robotics.misc,sci.electronics.design,sci.electronics.equipment,sci.electronics.misc,sci.electronics.basics,rec.radio.amateur.homebrew
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From: [e-mail] (Michael L. Ardai)
Subject: Re: PIC Programmer Holiday Specials until 12/31/96!
Message-ID: <[e-mail]>
Organization: Utopia Planetia Shipyards - Mars
References: <[e-mail]> <58k9hq$[e-mail]>
Date: Wed, 11 Dec 1996 05:09:47 GMT
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Sender: [e-mail]
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In article <58k9hq$[e-mail]> [e-mail] (Tom Bruhns) writes
:
-I'm interested in any comments
-folk may have on these products or other PIC programming bundles
-especially interested in knowing which of the
-readily available, reasonably inexpensive ones offer the best
-programming environments, and which work best with the smallest
-available PICs.

I have the ITU programmer, and other than an intermittant caused by ao
open in a too-thin trace on the PCB, it works fine.  Cheapest is
the programmer for the 16C84 in the apps note (AN589?) driven by a
parallel port.  Do an AltaVista search for "pic near micro" or "microchip" -
there's lots of stuff out there...

-And are there smaller PICs than the 18-pin SOIC size

They just announced one in an 8-pin DIP or SOIC package, similar to the
16C84...  Not sure who sells that one yet.

--
\|/      Michael L. Ardai        N1IST       [e-mail]       \|/
-*- ===  Boston Amateur Radio Club:  http://www.barc.org/barc   === -*-
/|\    or send "info barc-list" to [e-mail]     /|\


From [e-mail] Wed Dec 11 20:11:28 1996
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From: [e-mail] (William White)
Newsgroups: rec.radio.amateur.homebrew
Subject: PIN Diode TR plans?
Date: Tue, 03 Dec 1996 20:22:29
Organization: GNN
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I am looking for plans (schematics/construction details)
for a 2 Meter PIN Diode TR switch.  I'd like to keep
it compact while still able to handle 35-40 watts, let's
call it 50 watts MAX. I've got the rf sense worked out,
so all I need is the actuall switching.  Any help would
be greatly appreciated.  Thanks in advance.


John
KD4YRB



From [e-mail] Wed Dec 11 20:11:29 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!connix.com!usenet
From: [e-mail] (pete brunelli)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: PIN Diode TR plans?
Date: Wed, 04 Dec 1996 14:28:18 GMT
Organization: Connix - The Connecticut Internet Exchange
Lines: 20
Message-ID: <5841j0$[e-mail]>
References: <582jbd$[e-mail]>
NNTP-Posting-Host: pcb.connix.com
X-Newsreader: Forte Free Agent 1.0.82

[e-mail] (William White) wrote:

>I am looking for plans (schematics/construction details)
>for a 2 Meter PIN Diode TR switch.  I'd like to keep
>it compact while still able to handle 35-40 watts, let's
>call it 50 watts MAX. I've got the rf sense worked out,
>so all I need is the actuall switching.  Any help would
>be greatly appreciated.  Thanks in advance.

John,
I am looking for a similar schematic for TR switching at low power HF.
The application is a stand-alone RF sensed TR box for use at QRP using
seperate RX and TX.  If you run into something like this, could you
let me know?

>John
>KD4YRB





From [e-mail] Wed Dec 11 20:11:31 1996
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From: [e-mail] (Steven Kerns)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: PIN Diode TR plans?
Date: 5 Dec 1996 00:33:30 GMT
Organization: Penn Biomedical Support, Inc.
Lines: 25
Distribution: world
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References: <582jbd$[e-mail]>
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Buy the ARRL UHF/Microwave Project Manual, there are a
couple of circuits complete with componet values for
2M PIN TR switches.  Or try Down East Microwave's Web
site at HTTP\\www.downeastmicrowave.com.  They have
complete and partial PIN TR kits at very good prices!

Hope this helps, 73

Steven Kerns N3FTI
[e-mail]

In article <582jbd$[e-mail]>, [e-mail] says...
>
>I am looking for plans (schematics/construction details)
>for a 2 Meter PIN Diode TR switch.  I'd like to keep
>it compact while still able to handle 35-40 watts, let's
>call it 50 watts MAX. I've got the rf sense worked out,
>so all I need is the actuall switching.  Any help would
>be greatly appreciated.  Thanks in advance.
>
>
>John
>KD4YRB
>



From [e-mail] Wed Dec 11 20:11:32 1996
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From: Guy Fletcher <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: PIN Diode TR plans?
Date: Thu, 05 Dec 1996 13:09:18 -0800
Organization: School of MPCE, Macquarie University
Lines: 19
Message-ID: <[e-mail]>
References: <582jbd$[e-mail]>
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CC: [e-mail]

William White wrote:
>
> I am looking for plans (schematics/construction details)
> for a 2 Meter PIN Diode TR switch.  I'd like to keep
> it compact while still able to handle 35-40 watts, let's
> call it 50 watts MAX.
>
> John
> KD4YRB

John,

Try SM5BSZ's web page for a detailed technical discussion and
design. It is at
        http://ham.te.hik.se/homepage/sm5bsz/index.htm
Well down the front page, follow the link to
"High power antenna relay using PIN diodes".

Good luck,      Guy     VK2BBF


From [e-mail] Wed Dec 11 20:11:33 1996
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From: Clifford Buttschardt <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: PIN Diode TR plans?
Date: Thu, 5 Dec 1996 13:26:06 -0800
Organization: Call America Internet Services  [phone]
Lines: 30
Message-ID: <[e-mail]>
References: <582jbd$[e-mail]> <5841j0$[e-mail]>
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Mime-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
To: pete brunelli <[e-mail]>
In-Reply-To: <5841j0$[e-mail]>

There was a design using 50 watt PIN diodes written up in QEX magazine.
They were Motorola devices as I remember and appeared in the "RF Update"
column, which is not indexed well, therefore I am having difficulty
referencing that article!  Cliff Buttschardt K7RR

On Wed, 4 Dec 1996, pete brunelli wrote:

> [e-mail] (William White) wrote:
>
> >I am looking for plans (schematics/construction details)
> >for a 2 Meter PIN Diode TR switch.  I'd like to keep
> >it compact while still able to handle 35-40 watts, let's
> >call it 50 watts MAX. I've got the rf sense worked out,
> >so all I need is the actuall switching.  Any help would
> >be greatly appreciated.  Thanks in advance.
>
> John,
> I am looking for a similar schematic for TR switching at low power HF.
> The application is a stand-alone RF sensed TR box for use at QRP using
> seperate RX and TX.  If you run into something like this, could you
> let me know?
>
> >John
> >KD4YRB
>
>
>
>
>



From [e-mail] Wed Dec 11 20:11:33 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: PIN Diode TR plans?
Date: 6 Dec 1996 23:10:37 GMT
Organization: AOL http://www.aol.com
Lines: 10
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References: <[e-mail]>
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Hi--

I wrote a short piece on PIN TR switches in Winter '95 Communications
Quarterly (P66) that may provide some helpful background.  It was for low
power TX switching, but might add something to your search for
information.  The basic priciples are the same--although the QEX article
would be a lot more specific for cookbooking something in the 50-W power
range.

Rick K1BQT


From [e-mail] Wed Dec 11 20:11:34 1996
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From: "Norm" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Plans for dummy load
Date: 5 Dec 1996 12:49:54 GMT
Organization: SuperNet Inc. +1.303.296.8202 Denver Colorado
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Anyone have plans for a dummy load for up to 150 watts? Thanks
[e-mail]


From [e-mail] Wed Dec 11 20:11:35 1996
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From: "Norm" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Plans for dummy load
Date: 5 Dec 1996 12:50:07 GMT
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Anyone have plans for a benchtop dummy load for up to 150 watts?
Thanks, [e-mail]


From [e-mail] Wed Dec 11 20:11:37 1996
Newsgroups: rec.radio.amateur.homebrew
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From: Monty Wilson <[e-mail]>
Subject: Re: Plans for dummy load
Message-ID: <[e-mail]>
Sender: [e-mail] (System Administrator)
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>Anyone have plans for a dummy load for up to 150 watts?

You'll need a 1-qt glass pickle jar, empty and washed, with
a metal lid.  You'll need a quart of baby oil, a chassis-mount
SO-239 connector and 36 each 47-ohm 2w resistors.

You will make six chains, each one containing six resistors
in series, then solder the chains in parallel and connect them
to the SO-239 connector.  You will need to make a hole
in the lid, and remove the plastic and paint around the hole
to install the connector.  Shorten the leads of 4 resistors
and only one lead of 2 additional resistors in order to make
a six-resistor chain about twice as long as the height of
the jar.  Solder the chain together and after it's cooled
bend it around in a loop and put it in the jar to see how it
will fit.  When you're satisfied with the lead lengths, make
five more like it.  Solder the chains together in parallel so
only one lead is on each end, and solder these two leads across
the SO-239.

Make sure the jar is absolutely dry.

Now the assembly is hanging from the lid.  Insert
the whole works carefully into the jar, to make sure it fits
and nothing touches together that shouldn't.  It's OK if leads
in one point of a chain touch leads in the same point of a
different chain because they're at the same voltage.  An
ohm-meter can verify the resistance to be 47 ohms.  Technically
we should be using 52 ohm resistors but 47 ohm resistors are
much easier to find and close enough for most purposes.

Now pull the assembly out of the jar and if you want this to be
leak-proof, take this opportunity to seal around the SO-239
connector with caulk or RTV.  Pour bottles of baby oil into the
jar, but allow enough space for the resistor chains to be
put back into the jar.  You might want to finish filling the
jar after inserting the resistors back into the jar, holding
the jar lid open while pouring in the last of the oil.  It's not
important to fill the jar completely, only to fill it up enough
to cover all the resistors in oil.

The dry dissipation of each resistor is rated to be 2w, so
immersed in mineral oil (baby oil) the whole works should be
able to dissipate 288 watts.  My rig is barefoot so I made
a dummy load from five strings of five resistors each rather
than six by six.

I never sealed mine around the connector, just screwed the lid
on tightly and tried to keep it upright at all times.  So
far it's worked out OK.

73
....Monty N5NVM.
mwilson @ flex.net (with spaces deleted)




From [e-mail] Wed Dec 11 20:11:37 1996
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From: [e-mail] ()
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: PLL's
Date: Mon, 02 Dec 1996 18:09:06 GMT
Organization: Southwestern Bell Internet Services
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Message-ID: <57uumn$[e-mail]>
References: <57qrpb$[e-mail]>
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[e-mail] (Zack Clobes) wrote:

>I was reading an article in the latest copy of QST covering the
>theory/construction of a temp compensated VFO.  The schematic reminded me of
a
>PLL with a feedback loop tied to a crystal oscilator.  In his article, he mad
e
>the statment that his VFO wouldn't have the extra phase noise that a
>traditional PLL has because of the loop.  Can anyone explain this?  I didn't
>think that the VCO wouldn't be effected by the locking loop.
>Thanks
>73s de Zack, W0ZC
Within the loop bandwidth of the PLL, the phase noise at the output,
is equal to the reference osc. noise multiplied by the total division
factor, N. The phase noise outside of the Loop bandwidth is that of
the VCO.
Reference: PLL Primer, by Andrzej Przedpelski

ie, you will decrease phase noise within the loop bandwidth of the
PLL.







From [e-mail] Wed Dec 11 20:11:38 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: PLL's
Date: 2 Dec 1996 15:49:54 GMT
Organization: AOL http://www.aol.com
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References: <57qrpb$[e-mail]>
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This system of stabilization is called "Huffnpuff" in Europe. It's
basically like the old "Galloping Ghost" radio control system used years
ago where the thing was never right on, but was always close.

Basically, a PLL injects phase noise in a VCO because it's ALWAYS
controlling not only the frequency but the phase of the VCO. Jitter,
divide noise, propagation delay all add noise to the VCO.

In the system Jake is describing, (Invented years ago by a Russian and
developed by a PA0 in the Netherlands,) You don't control the phase. You
don't even control CONTINUOUSLY, the frequency. Just every once in a
while, you compare the frequency desired with the frequency you have and
correct for the error. You're never on frequency exactly, but you stay
close, and the only noise on the oscillator is the basic phase and
amplitude noise of the free running oscillator. Make it as good as you
can, and you have the quietest oscillator short of crystal control.

W4ZCB

Lot's of references to it over the last 5 years in the RSGB magazine,
"Radio Communications". Usually titled HuffnPuff.


From [e-mail] Wed Dec 11 20:11:39 1996
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From: "Marc Denis" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: PLL's
Date: 3 Dec 1996 05:14:36 GMT
Organization: Quality Services
Lines: 33
Message-ID: <01bbe0d8$5f6912e0$[e-mail]>
References: <57qrpb$[e-mail]>
NNTP-Posting-Host: 207.67.104.18
X-Newsreader: Microsoft Internet News 4.70.1157



Zack Clobes <[e-mail]> wrote in article
<57qrpb$[e-mail]>...
> I was reading an article in the latest copy of QST covering the
> theory/construction of a temp compensated VFO.  The schematic reminded me
of a
> PLL with a feedback loop tied to a crystal oscilator.  In his article, he
made
> the statment that his VFO wouldn't have the extra phase noise that a
> traditional PLL has because of the loop.  Can anyone explain this?  I
didn't
> think that the VCO wouldn't be effected by the locking loop.
> Thanks
> 73s de Zack, W0ZC
> [e-mail]
> http://www2.southwind.net/~zclobes/zackc.html
>
>

The article you are referring to is describing a digital AFC loop, not a
PLL. As such,, the error voltage to the VCO is a very slow and sllight
change. The VCO will slowly drift within the correction range , but no
further.

This approach SHOULD be able to deliver better noise sideband preformance
for a given oscillator design than wold be feasible for a PLL, but it is
not truly phase locked to a reference.

Obvious good applications would be to retrofit older radios with LC tuned
oscillators that are drifty (all of them).




From [e-mail] Wed Dec 11 20:11:40 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: PLL's
Date: 3 Dec 1996 18:39:04 GMT
Organization: America Online, Inc. (1-800-827-6364) (1.14)
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References: <[e-mail]>
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In article <[e-mail]>,
[e-mail] writes:

>
>W4ZCB
>
>Lot's of references to it over the last 5 years in the RSGB magazine,
>"Radio Communications". Usually titled HuffnPuff.
>
>

I'm considering a design like this.
Is it merely a frequency counter and an embedded controlled D/A converter?

Carl
N9EFJ


From [e-mail] Wed Dec 11 20:11:41 1996
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From: [e-mail] ()
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: PLL's
Date: Wed, 04 Dec 1996 05:46:27 GMT
Organization: CyberRamp.net, Dallas, TX [phone]/[phone] for info
Lines: 26
Message-ID: <582sd4$555$[e-mail]>
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[e-mail] (John Kolb) wrote:

  In his article, he made
>: the statment that his VFO wouldn't have the extra phase noise that a
>: traditional PLL has because of the loop.  Can anyone explain this?  I didn'
t
>: think that the VCO wouldn't be effected by the locking loop.

 Low freq
>noise within the loop bandwidth will be mostly canceled by the PLL
>( it can't cancel it all - it doesn't start to react untill it detects
>a change has already occured ), but higher freq noise components
>above the loop time constants will not be canceled.

Really, the two main points to improved Phase noise in a PLL system
are:
1.  the phase noise of the reference osc.
2. The PLL will greatly improve the VCO's phase noise inside the loop
bandwidth.

The reference osc is the critical part.
Hence, the best Reference osc. is a low phase noise TCXO.

It is always good design practice to have a low phase noise VCO.
But good results are obtained if all other paramaters are optimized as
best as possible, reagrding loop components, divider values, etc.



From [e-mail] Wed Dec 11 20:11:42 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: PLL's
Date: 6 Dec 1996 21:09:21 GMT
Organization: AOL http://www.aol.com
Lines: 26
Message-ID: <[e-mail]>
References: <[e-mail]>
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In article <[e-mail]>,
Michael Black <[e-mail]> writes:

>and with CMOS can still be low current.  You could add a switch to
>disable the readouts until needed.
>
>      Michael VE2BVW
>
>

Here is what I had in mind Michael,

I can make a continuous tuning dial with slotted wheel,opto's, op-amp and
four other chips. Fed into a microcontroller, the up down signals give you
range.
The micro knows the frequency desired (presets and dial increments) and
the
actual since it displays it.Use an 12 -16 bit R/2R D/A (Grand
simplicity:-)) and let the micro feed the D/A to lock ( not hardly) the
frequency. A half million corrections per second should stifle any drift.
Ha ha But can you imagine the AWFUL phase noise from such a design at that
speed? A good VCO is of paramount importance
here.

Carl
N9EFJ


From [e-mail] Wed Dec 11 20:11:43 1996
Newsgroups: rec.radio.amateur.homebrew
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From: [e-mail] (Gary Coffman)
Subject: Re: PLL's
Message-ID: <[e-mail]>
Reply-To: [e-mail] (Gary Coffman)
Organization: Destructive Testing Systems
References: <57qrpb$[e-mail]> <[e-mail]>
Date: Mon, 9 Dec 1996 02:22:52 GMT
Lines: 34

In article <[e-mail]> [e-mail] w
rites:
>This system of stabilization is called "Huffnpuff" in Europe. It's
>basically like the old "Galloping Ghost" radio control system used years
>ago where the thing was never right on, but was always close.
>
>Basically, a PLL injects phase noise in a VCO because it's ALWAYS
>controlling not only the frequency but the phase of the VCO. Jitter,
>divide noise, propagation delay all add noise to the VCO.
>
>In the system Jake is describing, (Invented years ago by a Russian and
>developed by a PA0 in the Netherlands,) You don't control the phase. You
>don't even control CONTINUOUSLY, the frequency. Just every once in a
>while, you compare the frequency desired with the frequency you have and
>correct for the error. You're never on frequency exactly, but you stay
>close, and the only noise on the oscillator is the basic phase and
>amplitude noise of the free running oscillator. Make it as good as you
>can, and you have the quietest oscillator short of crystal control.

In control system theory, this is called a bang-bang servo. Corrections
are periodically pulsed to a storage capacitor feeding the varactor.
The storage capacitor acts as a very long time constant low pass filter.
Since it is only occasionally driven, perturbations in the oscillator's
short term output only occur occasionally as well. It isn't as clean
as a crystal or LC free running oscillator, but it isn't as constantly
noisy as an oscillator under constant proportional control either.
With a basically stable oscillator, you'll only hear a correction
"tick" once every few seconds.

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] Wed Dec 11 20:11:45 1996
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From: Larry Martin <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: PLL's
Date: 11 Dec 1996 02:58:32 GMT
Organization: West Coast Online's News Server - Not responsible for content
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[e-mail] () wrote:
>[e-mail] (Zack Clobes) wrote:
>
>>I was reading an article in the latest copy of QST covering the
>>theory/construction of a temp compensated VFO.  The schematic reminded me of
 a
>>PLL with a feedback loop tied to a crystal oscilator.  In his article, he ma
de
>>the statment that his VFO wouldn't have the extra phase noise that a
>>traditional PLL has because of the loop.  Can anyone explain this?  I didn't

>>think that the VCO wouldn't be effected by the locking loop.
>>Thanks
>>73s de Zack, W0ZC
>Within the loop bandwidth of the PLL, the phase noise at the output,
>is equal to the reference osc. noise multiplied by the total division
>factor, N. The phase noise outside of the Loop bandwidth is that of
>the VCO.
>Reference: PLL Primer, by Andrzej Przedpelski
>
>ie, you will decrease phase noise within the loop bandwidth of the
>PLL.
>
Gross oversimplification!  :)
Larry



From [e-mail] Wed Dec 11 20:11:45 1996
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From: Larry Braden <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Programming Motorola HTs
Date: Mon, 09 Dec 1996 13:35:32 -0600
Organization: UT-Austin
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Is the software and cabling necessary to re-program
Motorolla business band radio for amateur use available
anywhere?  These are NBFM I think, and may work if re-reprogrammed.


From [e-mail] Wed Dec 11 20:11:46 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: PSE NEED PGM TO UNZIP PASS WZIP ARCHIVE
Date: Wed, 04 Dec 1996 23:26:22 GMT
Organization: Uniplus Internet Access
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From [e-mail] Wed Dec 11 20:11:47 1996
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From: Nicholas Geovanis  <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: QST 1/97 multimode project
Date: Fri, 6 Dec 1996 13:38:17 -0600
Organization: Northwestern University, Evanston, IL, US
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Hi all --
(WARNING! WARNING! Question from electronics dilletante!)
I copied the January QST article describing the simple RS232-attach
multimode decoder. Looking at the schematic, I thought, "This is so
simple, even I might be able to figure out how it works." So...
Does the term "limiter" mean the same thing as "clipper"? Looks to me like
all this thing does is "clip" the audio waves at a level useful for RS232
(what, isn't that +13 V. max or something), and the HAMCOMM or whatever
software samples the DSR line, (hopefully) alot faster than the signal. Is
this a fair description or is it totally stupid? So, if I can decode CW,
RTTY, Amtor and WEFAX with $10 of parts, a PC and shareware, why the hell
do MFJ, AEA, etc., charge hundreds of dollars for their decoders?
Thanks...Nick G.

<--------------------------------------------------------------------------->
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<--------------------------------------------------------------------------->




From [e-mail] Wed Dec 11 20:11:49 1996
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From: [e-mail] (Alan Crosswell)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: QST 1/97 multimode project
Date: 6 Dec 1996 21:49:50 GMT
Organization: Columbia University Academic Information Systems (AcIS)
Lines: 28
Message-ID: <58a4du$4hc$[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: curta.cc.columbia.edu

In article <[e-mail]>,
Nicholas Geovanis   <[e-mail]> wrote:

>RTTY, Amtor and WEFAX with $10 of parts, a PC and shareware, why the hell
>do MFJ, AEA, etc., charge hundreds of dollars for their decoders?
>Thanks...Nick G.

Yeah, its basically a level converter which causes a serial interrupt
each time the sine wave crosses the voltage threshold, I believe.
These interrupts are counted to get the frequency.

Sure you can use a $2000 computer (or oven a $6000 one) to do the same
job that a $200 multimode controller will do.  In fact, I've built the
HAMCOM interface and played around with HAMCOM 3.0 and JVFAX 7.0 for
hours on end.  It was pretty neat.  Kept me up late many evenings
looking at AMTOR/SITOR, RTTY, SSTV, FAX, etc.  Even gave someone a new
state toward his WAS RTTY.  I've also played with a BAYCOM for VHF
packet.

How well it detects might be one of the things that makes it not so
handy as an "appliance" controller.  The fact that it doesn't do any
of the more advanced HF digital modes like PACTOR, CLOVER, etc. is
another.  Having to tie up your multitasking PC to be running only
HAMCOM might be a concern too.  But, by all means try it out before
spending the bux.  HAMCOM is a very slick program.

/a



From [e-mail] Wed Dec 11 20:11:50 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
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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 20:11:51 1996
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From: [e-mail] (Dave Hilton)
Newsgroups: rec.radio.amateur.homebrew
Subject: Radio repair
Date: Mon, 09 Dec 96 01:24:10 GMT
Organization: KB1AUP
Lines: 10
Message-ID: <58ft8p$[e-mail]>
NNTP-Posting-Host: mega-42.megalink.net
X-Newsreader: News Xpress 2.0 Beta #2

Norway Electronics
Located in Norway Maine
Will service all brands of amateur radios.
Estimates are always free ( except for return shipping ).
Call [phone]
Norway Electronics
260 main st.
Norway Me.
04268
[e-mail]


From [e-mail] Wed Dec 11 20:11:52 1996
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From: [e-mail]* (mark wolfe)
Newsgroups: rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.amateur.misc,sci.electronics.misc,sci.electronics.repair
Subject: Re: Radio Shack Soldering Iron Replacement????
Date: Sun, 08 Dec 1996 03:24:27 GMT
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On 7 Dec 1996 21:37:40 GMT, [e-mail] (Ron Harshbarger) wrote:

> For years I have been using the soldering iron that I bought from RS which h
as
> screw in base heating elements in various wattages from 10 to 30 etc. Now of

> course they no longer handle the screw in base elements. Does anyone know wh
at
> brand the original was ( Weller, Wahl, etc) and if the replacement elements
are
> available anywhere? The base is about the same as a 110 VAC Christmas tree
> bulb.
>
> Thanks & 73
> --
> Ron Harshbarger
> K3PID
> [e-mail]
>

I ended up replacing my RS iron with a hakco solder station. :)   Of
course my RS iron was usally the 6 dollar type. :)   Know the one your
talking about, haven't seen one in years.   I'd pickup a weller or
something.   They'll last for years.
Cul,
Mark Wolfe



From [e-mail] Wed Dec 11 20:11:53 1996
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From: [e-mail] (Ron Harshbarger)
Newsgroups: rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.amateur.misc,sci.electronics.misc,sci.electronics.repair
Subject: Radio Shack Soldering Iron Replacement????
Date: 7 Dec 1996 21:37:40 GMT
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For years I have been using the soldering iron that I bought from RS which has

screw in base heating elements in various wattages from 10 to 30 etc. Now of
course they no longer handle the screw in base elements. Does anyone know what

brand the original was ( Weller, Wahl, etc) and if the replacement elements ar
e
available anywhere? The base is about the same as a 110 VAC Christmas tree
bulb.

Thanks & 73
--
Ron Harshbarger
K3PID
[e-mail]



From [e-mail] Wed Dec 11 20:11:54 1996
From: clawson(change to at symbol)iea.com (Chris Lawson)
Newsgroups: rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.amateur.misc,sci.electronics.misc,sci.electronics.repair
Subject: Re: Radio Shack Soldering Iron Replacement????
Date: Sun, 08 Dec 1996 01:36:06 GMT
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[e-mail] (Ron Harshbarger) wrote:

>For years I have been using the soldering iron that I bought from RS which ha
s
>screw in base heating elements in various wattages from 10 to 30 etc. Now of
>course they no longer handle the screw in base elements. Does anyone know wha
t
>brand the original was ( Weller, Wahl, etc) and if the replacement elements a
re
>available anywhere? The base is about the same as a 110 VAC Christmas tree
>bulb.
>
>Thanks & 73
>--
>Ron Harshbarger
>K3PID
>[e-mail]
>

I believe Ungar made the RS soldering irons.  The base of the heating
element is in fact the same as a 110v xmas bulb.  Makes a handy drop
light in a pinch.  The tip I believe was a 1/4"-20 thread.

Check Mouser, MCM, etc.  I known I've seen replacement tips that would
work.

-Chris


From [e-mail] Wed Dec 11 20:11:56 1996
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From: Dave Burr <[e-mail]>
Newsgroups: rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.amateur.misc,sci.electronics.misc,sci.electronics.repair
Subject: Re: Radio Shack Soldering Iron Replacement????
Date: Sat, 07 Dec 1996 21:12:32 -0600
Organization: MCSNet Services
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References: <58co34$[e-mail]>
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Ron Harshbarger wrote:
>
> For years I have been using the soldering iron that I bought from RS which h
as
> screw in base heating elements in various wattages from 10 to 30 etc. Now of
> course they no longer handle the screw in base elements. Does anyone know wh
at
> brand the original was ( Weller, Wahl, etc) and if the replacement elements
are
> available anywhere? The base is about the same as a 110 VAC Christmas tree
> bulb.
>
> Thanks & 73
> --
> Ron Harshbarger
> K3PID
> [e-mail]


Yeah...I feel your pain. I'd much rather spend hours and hours finding a
replacement tip than buying a whole new soldering iron for $6.99. When I
had the same problem I sent messages to several newsgroups and contacted
many manufacturers in writing and via telephone.

But I do offer words of encouragment. After several days of effort and
several e-mails, phone calls, and letters, I was able to find a
replacement element, shipped by Acme, for $12 plus $3 S&H. I figure that
if you count the value of my time, plus my expenses, I spent about 650
bucks but it's a hell of a lot better than letting "big business" take
advantage of me!

Hang in there!

Dave K9XK


From [e-mail] Wed Dec 11 20:11:57 1996
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From: [e-mail] (Joe Landis)
Newsgroups: rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.amateur.misc,sci.electronics.repair,sci.electronics.misc
Subject: Re: Radio Shack Soldering Iron Replacement????
Message-ID: <1996Dec8.150447.662@main03>
Date: 8 Dec 96 15:04:47 EST
References: <58co34$[e-mail]>
Distribution: world
Organization: North American Drager - Telford, PA
Lines: 22
Xref: news1.epix.net rec.radio.amateur.equipment:43914 rec.radio.amateur.homebrew:21875 rec.radio.amateur.misc:120042 sci.electronics.repair:45605 sci.electronics.misc:18368

In article <58co34$[e-mail]>, [e-mail] (Ron Harshbarger) wri
tes:
> For years I have been using the soldering iron that I bought from RS which h
as
> screw in base heating elements in various wattages from 10 to 30 etc. Now of

> course they no longer handle the screw in base elements. Does anyone know wh
at
> brand the original was ( Weller, Wahl, etc) and if the replacement elements
are
> available anywhere? The base is about the same as a 110 VAC Christmas tree
> bulb.
>
> Thanks & 73
> --
> Ron Harshbarger
> K3PID
> [e-mail]
>
Hi Ron,
Sounds like the old Ungar irons. I've noticed that Mouser carries Ungar.
You might try them. [phone].

Joe - AA3GN
--
[e-mail] - speaking only for myself, of course
No, this is not a sig.


From [e-mail] Wed Dec 11 20:11:58 1996
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From: Nicholas Bodley <[e-mail]>
Newsgroups: rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.amateur.misc,sci.electronics.misc,sci.electronics.repair
Subject: Re: Radio Shack Soldering Iron Replacement????
Date: Mon, 9 Dec 1996 04:13:18 -0500
Organization: The Internet Access Company, Inc.
Lines: 18
Message-ID: <[e-mail]>
References: <58co34$[e-mail]>
NNTP-Posting-Host: sunspot.tiac.net
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To: Ron Harshbarger <[e-mail]>
In-Reply-To: <58co34$[e-mail]>
Xref: news1.epix.net rec.radio.amateur.equipment:43929 rec.radio.amateur.homebrew:21882 rec.radio.amateur.misc:120065 sci.electronics.misc:18384 sci.electronics.repair:45625

On 7 Dec 1996, Ron Harshbarger wrote:

{Snips}

}brand the original was ( Weller, Wahl, etc) and if the replacement elements a
re
}available anywhere? The base is about the same as a 110 VAC Christmas tree

 The originals were Ungar; Cooper bought Weller, and Weller bought Ungar,
although maybe not in that order. I used the handle as a trouble light
once, but the bulbs (Xmas tree = standard candelabra screw, I believe) are
fragile!!

|*  Nicholas Bodley   *|*  Electronic Technician {*} Autodidact & Polymath
|*   Waltham, Mass.   *|*  -----------------------------------------------
|*  [e-mail]  *|*    When the year 2000 begins, we'll celebrate
|*  Amateur musician  *|*    the 2000th anniversary of the year 1 B.C.E.
--------------------------------------------------------------------------



From [e-mail] Wed Dec 11 20:11:58 1996
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From: [e-mail] (Thor Andersen)
Newsgroups: rec.radio.amateur.homebrew
Subject: Ramsey kit.
Date: 11 Dec 96 05:25:44 GMT
Organization: ucsd usenet gateway
Lines: 8
Message-ID: <[e-mail]>
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]

Hello.

I have build two Ramsey FR-146 2 meter FM receiver kits. They are working ok
on receving, but the squelch is not working ok. Is there a modification for
this fault?

73's Thor LA2DAA in Drammen, Norway.



From [e-mail] Wed Dec 11 20:11:59 1996
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From: Jay Craswell <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Re schematic drawing program
Date: 9 Dec 1996 17:17:42 GMT
Organization: Dover Research Corp.
Lines: 11
Message-ID: <58hhjm$g42$[e-mail]>

One other program of interest is Circad.  I have a special deal with them
where I buy in bulk and resell to Hams.  My site license is for everyone on
the CDROM!  Normal price is a whopping $995 but from me $295.  The only
difference is no direct support with Holophase (Call me instead) and updates
are $50  If you have web access check out the new page they made up at
www.holophase.com  Drop me an E-mail or call if you want the special price
ham version.  [phone]
73

--
73, Jay WB0VNE - AAV5TH


From [e-mail] Wed Dec 11 20:12:01 1996
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From: [e-mail] (Dave)
Newsgroups: rec.radio.swap,rec.radio.amateur.homebrew
Subject: Regency Handheld 2m for Trade for homebrew parts
Date: 11 Dec 1996 07:47:17 GMT
Organization: Netcom
Lines: 48
Message-ID: <58lou5$[e-mail]>
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I have a Regency Micro Com PH-251A handheld 2m rig
I'd like to trade.  It's only a single channel, and not
even on a ham channel!  Currently crystalled for
151.805, xmt and rcv.  Has slots in PCB for a number of
additional xtals if you felt like putting them in.
This is the standard Regency handheld of old.

With leather case, and Wilson BC-2C charger base.  NiCad
in good shape, radio works very well. With 'duckie' antenna.
Tuned it in on my scanner and it sounds great.  1 watt or
5 watts switchable.  External mike/spkr jack in top.  Very
good physical and electrical shape

Just needs xmt and rcv rocks for a repeater or simplex pair.

What do I want?  $30 plus shipping :( or homebrew parts.

Here's what I'm after:

        Vernier dials - the kind you can put a label behind
            like the old Johnson series

        3-section 1100pf Variable caps

        Stripped SB-xxx Heathkit chassis (no parts) - want for
            homebrew project

        SB-430 Station Console (thingy with the clock, timer, and SWR meter)

        500-0-500v 100ma range power transformers - anything close

        Coil stock of any airwound flavor

        Little unfinished RF / Ham projects that got started and never
             finished that have nifty parts inside

        Any combinations of the above.

You get the picture....I do alot of homebrewing these days, and my junk box is
as empty as my wallet!


Email to:   Dave    [e-mail]


(To those who know me, yes I was [e-mail] - changed ISP's)


From [e-mail] Wed Dec 11 20:12:02 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: RF Mirror for 2.4 GHz
Date: 10 Dec 1996 21:25:54 GMT
Organization: AOL, http://www.aol.co.uk
Lines: 10
Message-ID: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

Dear Forum Members:

I am looking for some materials which could be suitable
to build a RF mirror suitable for 2.4  GHz, would you
have any recommendations.


Thank you for your interest and time.

Alberto


From [e-mail] Wed Dec 11 20:12:03 1996
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From: Gary Tait <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Ribbon cable stripping
Date: Fri, 6 Dec 1996 10:59:54 -0500
Organization: Bruce Municipal Telephone System
Lines: 22
Message-ID: <[e-mail]>
References: <587v38$[e-mail]>
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Mime-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
To: "William A. Gordon" <[e-mail]>
In-Reply-To: <587v38$[e-mail]>

On 6 Dec 1996, William A. Gordon wrote:

#I am looking for a low cost approach to stripping 14 conductor ribbon cable
#(0,050: spacing).  I need some kind of tool to strip about 0.1" off one
#end of the cable.  A company named Paladin/Weidmueller made one once upon a t
ime
#but can't get it in the U.S. anymore.  Does anyone have such a tool for sale
?
#Are there some homebrew versions that anyone knows of ?  Any help in this reg
ard
#is appreciated.
#
#TIA
#

What I do is slice the into both sides of the ribbon, and pull the
insulation off. Be sure not to nick the wires.

Gary Tait , VE3VBF
- Please quote prices in $CDN, as $US prices are no good to me ,here in   -
- Canada. If you must quote prices, please quote prices from dealers in   -
- the Toronto, Ontario area,and westward.(my location is near Kincardine)





From [e-mail] Wed Dec 11 20:12:04 1996
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From: [e-mail] (KW5Q)
Newsgroups: rec.radio.amateur.homebrew
Subject: SbFFT1.2  SB16 spectrum & filtering - BETTER GRAPHICS SUPPORT
Date: Fri, 06 Dec 96 03:44:41 GMT
Organization: Adhesive Media, Inc.
Lines: 45
Message-ID: <5884t7$1s5$[e-mail]>
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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 20:12:05 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Schematic Drawing Software For Ham Use?
Date: 10 Dec 1996 05:02:16 GMT
Organization: AOL http://www.aol.com
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Hi

Please tell us here on the newgroup how you get a discount
of more that $700 on this deal. Details Ok! I got time.

That type of discount assures me that the company is making a phenomonal
profit. Probably in excess of 2000%. It also alludes that you are making a
hugh profit yourself!

Carl
N9EFJ
The2x4


From [e-mail] Wed Dec 11 20:12:07 1996
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From: [e-mail] (Jim Weir)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Schematic Drawing Software For Ham Use?
Date: Tue, 10 Dec 1996 17:58:44 GMT
Organization: RST Engineering
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Jay Craswell <[e-mail]> shared these priceless pearls of
wisdom:

->Circad is $995 (Unless your a Ham, Ham price=$295)  Drop me an E-Mail if
->your interested.  Or check out the WEB site www.holophase.com

I downloaded the "try me" version of Circad and I'm having some trouble
getting started.  Like any wonderful program, it is only wonderful if you
can use it.  There isn't any printable documentation OR sample files to
load and play with.

Also, there is supposedly an "educational" version of this program that is
available to electronics teachers.  How do we find out about this version?

I guess it boils down to this:

1.  The sample program is crippled on the size of file you can save, but
nowhere is the crippled size documented.  What is the cripple limit?

2.  What are the limitations on the ham and teacher versions of the
software?  Pins?  File size?

3.  What are the limitations on the full software?

4.  Where can we get decent printed instructions and/or sample files?

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] Wed Dec 11 20:12:08 1996
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From: Zack Lau <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Schematic Drawing Software For Ham Use?
Date: Tue, 10 Dec 1996 11:45:55 -0500
Organization: American Radio Relay League
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To: [e-mail]

[e-mail]  N9EFJ wrote:
>
> Hi
>
> Please tell us here on the newgroup how you get a discount
> of more that $700 on this deal. Details Ok! I got time.
>
> That type of discount assures me that the company is making a phenomonal
> profit. Probably in excess of 2000%. It also alludes that you are making a
> hugh profit yourself!
> You seem to be ignoring a big cost factor--supporting the
software.  A ham dealer might be able cut the cut these
costs by marketing to the right people and being able to
communicate effectively with his customers using jargon not
familiar to the manufacturer.--Zack W1VT.


From [e-mail] Wed Dec 11 20:12:09 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Schematic Drawing Software For Ham Use?
Date: 11 Dec 1996 08:32:23 GMT
Organization: AOL http://www.aol.com
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In article <[e-mail]>, Zack Lau <[e-mail]> writes:

>> hugh profit yourself!
>> You seem to be ignoring a big cost factor--supporting the
>software.  A ham dealer might be able cut the cut these
>costs by marketing to the right people and being able to
>communicate effectively with his customers using jargon not
>familiar to the manufacturer.--Zack W1VT.
>
>
CirCad software -$995.00

This huge support factor was created by the manufacturer to justify
the $995 cost I quess. The support was equal to more that $700 of the
cost of the program. ...more that $700? You are getting it for less
that $295? Right? Per program I should say. Right again? Where could I
find an organization that spends 70% of its income from a product to pay
for support. That only leaves 30% for rent, utilites, return on R&D...you
know what I mean.

Not my concern really just curious but will you explain this lack of
support the ham version provides?

Carl


From [e-mail] Wed Dec 11 20:12:10 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Schematic Drawing Software For Ham Use?
Date: 11 Dec 1996 08:32:21 GMT
Organization: AOL http://www.aol.com
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Since you chose not to answer my question let me say:

I have tried CirCad.
The shareware version I tried had crude menus in the manner that a
beginner
would make. As if there was no attempt to take the look of the system
beyond essential stuff that was available 10 or more years ago. I would
think
a program that costly would upgrade to a stylish version like the rest
have.

YOU are correct. No support.

The documentation available was really no documentation compared to any
other
CAD programs.

Many other CAD programs, shareware that is, and one in particular-
DraftCHoice -
makes CirCad look childish.

Hell, Easytrax, can be made to draw schematics, does all the CNC Gerber
stuff and it is freeeeeeeeeeee.

If Harvard Garphics 3.0 for DOS would allow .025 inch snap spacing on 8.5
x 11, I wouldn't need anything else. Not even AutoCad.

CirCad, the version I tried, has a value of less than $50. The best
version
of DraftChoice is $99. There are many better deals.

Schematic capture? Can't draw the schematic if you can't understand the
program.Net list? Bus? Come onnnn.

Carl


From [e-mail] Wed Dec 11 20:12:11 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
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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 20:12:12 1996
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From: [e-mail] (Robert Mitchell)
Newsgroups: rec.radio.amateur.homebrew
Subject: Seriers IC-x7 Simplex Tone Encoder Operation
Date: Wed, 04 Dec 1996 03:33:25 GMT
Organization: Vaxxine Public Internet Access
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Procedure to use Tone Encoder for Simplex Operation for IC-x7 Series
Radios

          First set freg. then put either + or - duplex and then
change the offset from 600
in increments of 100 down to 0.00 offset with the offset write button
(Item 8 pages 6 &
7 of the manual) leaving the duplex switch on, then set the tone freq
in the normal way.
As far as the radio is concerned it is on duplex.  The difference is
that the duplex
transmit freq. is the same as the receive freq instead of + or - 600.


        It works great and thnaks to Bruce Martin for the information.

73  Bob VE3KYA


From [e-mail] Wed Dec 11 20:12:13 1996
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From: "K.R.Burtchaell" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: soldering home brew boards
Date: Fri, 06 Dec 1996 19:24:09 -0800
Organization: KENTRON
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I am looking for suggestion s on soldering homebrew pcbs.Usually just a
couple of ICs chip caps and resistors.Is solder paste the way to go?If
so how to solder?Heat gn or reflow?Looking for suggestions that are
easily done in the homeworkshop.  73  Ken  W6GHV


From [e-mail] Wed Dec 11 20:12:14 1996
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From: [e-mail] (M Simon)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: soldering home brew boards
Date: Sun, 08 Dec 1996 18:07:36 GMT
Organization: Space-Time Productions
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Rosin Liquid Flux - alcohol based. Kester 1544RA. Try Mouser as
a source.

Always works for me. It is a little messy. Rubbing alcohol
without lanolin will clean up.

Simon
----------------------------------------------------------------

"K.R.Burtchaell" <[e-mail]> wrote:

>I am looking for suggestion s on soldering homebrew pcbs.Usually just a
>couple of ICs chip caps and resistors.Is solder paste the way to go?If
>so how to solder?Heat gn or reflow?Looking for suggestions that are
>easily done in the homeworkshop.  73  Ken  W6GHV

In the end people get the government they deserve.

Read "The Weapon Shops of Isher" by A.E. vanVogt

Simon



From [e-mail] Wed Dec 11 20:12:15 1996
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From: woody white <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Source for rectangular chassis punch?
Date: Wed, 11 Dec 1996 03:33:21 -0800
Organization: http://www.geocities.com/capecanaveral/3722
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scott wrote:
> I expect Greenlee makes a punch that will work but don't know if the
specific sizes you need are "stock".  You could try Newark Electronics or
Allied Electronics for one, but first visit your local electrical
contractor supply supply house.  Greenlee punches are commonly used by
electricians and even if the store dosen't have what you need, they may
be able to order it for you.   Woody

> Anybody know where to buy a rectangular punch for an aluminum chassis
> box?  Small, hand operated with a couple of wrenches.  Need rectangular
> holes for mounting Waldom/molex connectors.  Cut-out size of
> approximately 1.094" X 0.850" and 0.948" X 0.850".  We're going to be
> making 100-150 of these so don't suggest drilling/filing/nibbling.  Any
> other ideas?  Tnx, 73, Scott, N0EDV.
>
> --
> Gotta FLY or gonna Die !
>     Ask me about my
>  Aeronca Super Chief !

--
de  Woody (WB4QXE) -  [e-mail]
Electron Microscopist/Microanalysist,
Ham radio "homebrewer", shade tree mechanic,
'90 Nissan 240SX, wish still had my Mcycle too!
http://www.geocities.com/capecanaveral/3722
.


From [e-mail] Wed Dec 11 20:12:16 1996
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From: scott <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Source for rectangular chassis punch?
Date: Wed, 11 Dec 1996 02:32:14 -0800
Organization: Aero Head Aviation
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Anybody know where to buy a rectangular punch for an aluminum chassis
box?  Small, hand operated with a couple of wrenches.  Need rectangular
holes for mounting Waldom/molex connectors.  Cut-out size of
approximately 1.094" X 0.850" and 0.948" X 0.850".  We're going to be
making 100-150 of these so don't suggest drilling/filing/nibbling.  Any
other ideas?  Tnx, 73, Scott, N0EDV.

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


From [e-mail] Wed Dec 11 20:12:17 1996
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From: [e-mail] (BOB ROACH)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Source for Siemens pa
Message-ID: <[e-mail]>
Date: Mon, 02 Dec 96 08:35:00 -0500
Distribution: world
Organization: SelectiveSourceBBS Virginia Beach [phone]
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 -=> Quoting Joseph M  Zawodny to All <=-

 JMZ> I need to find a place that sells Siemens components.
 JMZ> Specifically, I looking for the BAT14-099 dual Schottky diode.
 JMZ> Please reply to [e-mail].

Hello,

Call Roy Arnette at Siemens Automotive, Newport News (875-7130).  He
will probably have a number to get you on the way to finding what you
need.  We purchase a lot of industrial controls from Siemens (of course)
and I'm sure that those folks can point you to the exact place you need.
Also check the Siemens homepage on the internet.

73
Bob
KE4QOK

... Backup not found: (A)bort (R)etry (S)lap nearest innocent bystander.
___ Blue Wave/DOS v2.30 [NR]


From [e-mail] Wed Dec 11 20:12:18 1996
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From: "Bruce C. Raisley A.R.S. N9ZLE" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: SSTV,FAX,RTTY,CW and more
Date: Mon, 09 Dec 1996 09:01:11 -0500
Organization: SkyMaster products
Lines: 10
Message-ID: <[e-mail]>
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If your looking for a do it all multimode check out this
page.

                http://www.cris.com/~n9zle/hc.html


It does everything except packet and it may do that soon.


                mailto:[e-mail]


From [e-mail] Wed Dec 11 20:12:18 1996
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From: Peter Lascell <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Stancor Poly-Pedance Mod Xfmr taps
Date: Tue, 10 Dec 1996 20:34:12 -0800
Organization: In Mind, Inc.
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Does anyone have an instruction sheet for a Stancor A-3893 (1960
vintage) or other "Poly-Pedance" modulation transformer of the A-389x
series. Need the taps and jumper connection chart to match impedances.

These transformers were for a multitude of impedances as reported in
their catalogs and were used in the ARRL Handbook for one or more
modulators around 1960-1965.  But the construction articles never
specifically  identified the taps to be used, rather refered the user to
the instruction sheet packed with transformers to determine which taps
are shorted and which ones are used for the plate connections.  The
operating current & voltage determined the impedance and tap adjustments
were required to get the ratios right.

To be sure I get your response if you can help, please copy to:

[e-mail]

73  Pete


From [e-mail] Wed Dec 11 20:12:19 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Subscribing
Date: 11 Dec 96 12:45:34 GMT
Organization: ucsd usenet gateway
Lines: 6
Message-ID: <[e-mail]>
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]

  Howdy there, I was telneting via 2 meter's to Moscow earlier this morning
and seen they carried Ham Homebrew.  If you possibly have time, could you
please forward me info on how to subscribe?
Thanks & 73's
Victor, KC8CKZ, located in Dorr, MI.
[e-mail]


From [e-mail] Wed Dec 11 20:12:20 1996
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From: [e-mail] (Marijan Miletic)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Suppressor calculation
Date: 3 Dec 96 13:19:55 GMT
Organization: ucsd usenet gateway
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NNTP-Posting-Host: mail.ucsd.edu
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It seems to me that I made it at AG6K mailing list as I received two direct
notes from him!

>I was not aware that an L/R VHF parasitic suppressor can be tuned.  How is
>this accomplished?

While attempting to reason suppressor calculation,  I had difficulties trying
to decide the very starting point for the whole process.  This variable is
desired VHF frequency we wish to suppress and the only other changing factor
is plate tuning capacitor.  Tube output capacitance is a known fixed value so
by selecting proper inductance we achieve parallel resonance at VHF and then
damp the circuit by suitable low resistor.

>snip.......
Grow up, Hollywood!

>......see "Calculating Power Dissipation in Parasitic-Suppressor Resistors"
>on page 35 in the March, 1989 *QST*

Any formulas involved?  Bring them up after 17 years for evaluation...


W8JI, Tom showed some interesting measured data on the anode circuit.

>The anode circuit of the AL-80B I just measured has two resonances (other
>than the ones normally due to HF tank components). One is adjustable over
>a range of 63.34 to 22.63 MHz as the plate tuning cap is adjusted. It
>moves down in frequency as the capacitor is meshed.

>The second resonance is at 152.10 - 161.36 MHz. It moves UP in frequency
>as the capacitor is meshed.

>With the suppressor removed this resonance moves up to 192.16 MHz.

Second resonance beats laws of physics but there are lot of unwanted side-
efects with real components.

The first one would require capacitance change in the order of 7.8 which
is impossible in series combination of tube output capacitance and plate
tuning variable capacitor.

It is frightening to think that 24 & 28 MHz bands are within plate resonace
with closed capacitor!  What a quick way to blow suppressors!?

73 de Mario, S56A, N1YU.

P.S.  In "S5 3/6/9 A" note I claimed we do NOT need suppressors unless
we detect VHF oscilations in finished QRO ("Collins" way).  Any comment?

P.S. II  Andy, WB6MPT comment is highly appreciated emphasising known phenomen
a
of loss of human knowledge within a short time span.  I expierenced that
clearly with PC which did all the previous mistakes minicomputers made!

P.S. IIi  Rich, what is the tricky Q problem?  I enjoy refreshing my math at 5
1


From [e-mail] Wed Dec 11 20:12:22 1996
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From: Andy Heninger <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Suppressor calculations
Date: Mon, 02 Dec 1996 11:30:06 -0800
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Marijan Miletic wrote:
>
> Rich, AG6K asked me to show the right mathematical formulas for calculating
> VHF suppressor values and I did my homework!  To the best of my knowledge,
> this was not done before in the ham literature.  I understand N7WS showed
> proper current distribution in parallel R/L circuit ahead of my KISS example
.
>
> #1.
> Decide the frequency of potential VHF oscillations from known history of the
> particular tube or measurement data in real QRO circuit.  Avoid the multiple
s
> of the highest operating frequency (in case of 30MHz NEVER tune suppressor a
t
> 90, 120 or 150 MHz).  Let us take F=130 MHz.
>

[  Remainder of calculation deleted.]

Don't neglect the poor grid circuit.

An amplifier with a VHF parasitic is operating as a tuned-grid
tuned-plate oscillator, with tank circuits on each side composed
primarily of the tube capacitances and the wiring inductances.  As Tom
R. has pointed out earlier, the oscillating amplifier is functioning in
a common-cathode, grid driven configuration, even in (for normal
operation) grounded grid amps.

The parasitic suppressor in the plate lead works in two ways - the much
discussed lowering of the Q of the VHF plate circuit resonance AND
moving that resonance far in frequency from the grid resonance.  The
assumption is that the grid resonance is at a higher frequency than the
plate to start with, in which case moving the plate resonance lower
(suppressor coil), or the grid resonance higher will help.  I believe
Tom R. mentioned the importance of short direct grounding or bypassing
of the grid somewhere back in one of these amplifier threads.

In trying to make sense of all of these discussions, I find it helps to
keep the whole circuit in mind.  We've got an amplifier with a VHF
frequency response that is determined by its input and output circuits,
and some feedback through the tube's internal capacitances.  If, at any
frequency, the gain around the loop (amplifier + feedback path) exceeds
unity, the amplifier will oscillate.  Anything that sufficiently reduces
the maximum gain or feedback will make the amplifier unconditionally
stable.

I have an old textbook (Radio Engineers' Handbook, Frederick Terman,
1943) that talks about suppressing VHF parasitics in HF RF amplifiers by
several methods -

  -  A coil alone in the plate lead, to further separate the grid and
plate
     VHF resonances.  No resistor.

  -  A resistor alone in the plate lead, to dampen the resonance.  No
added inductance.
     This resistor is directly in the VHF tank, but not in the HF tank.
     The same is true of the resistance component of Rich M.'s
suppressors.

  -  A neutralization circuit that is effective at VHF (reduce the
feedback).

Evidently the modern suppressor circuit either wasn't yet developed or
wasn't well known when the book was written.  But the basic problem was
the same, and was well understood.

   -- Andy Heninger  WB6MPT


From [e-mail] Wed Dec 11 20:12:23 1996
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From: [e-mail] (R. L. Measures )
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Suppressor calculations
Date: Mon, 02 Dec 1996 22:11:36 -0700
Organization: Internet Access of Ventura County
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In article <[e-mail]>, [e-mail] wrote:

> Rich, AG6K asked me to show the right mathematical formulas for calculating
> VHF suppressor values and I did my homework!  To the best of my knowledge,
> this was not done before in the ham literature.

.....see "Calculating Power Dissipation in Parasitic-Suppressor Resistors"
on page 35 in the March, 1989 *QST*
.
> #1.
> Decide the frequency of potential VHF oscillations from known history of the
> particular tube or measurement data in real QRO circuit.  Avoid the multiple
s
> of the highest operating frequency (in case of 30MHz NEVER tune suppressor a
t
> 90, 120 or 150 MHz).  Let us take F=130 MHz.

I was not aware that an L/R VHF parasitic suppressor can be tuned.  How is
this accomplished?
snip.......

You apparently did not do your homework on calculating suppressor resistor
dissipation, Mario.

--
--Rich-- ag6k, 805-386-3734


From [e-mail] Wed Dec 11 20:12:25 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Suppressor calculations
Date: 3 Dec 1996 22:06:04 GMT
Organization: America Online, Inc. (1-800-827-6364) (1.14)
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Hi Rich,

In article <[e-mail]>,
[e-mail] (R. L. Measures ) writes:

>Yes he did Andy.  However I found little difference in the resonant
>frequency of the grid circuit in a 3-500Z whether the grid was
>directly-grounded or grounded through capacitors, as is the case in the
>SB-220.  The inductive reactance of the grid seems to be somewhat
cancelled
>by the capacitive reactance of the grid bypass capacitors.  I found that
>with low values of grid bypass C, the grid resonant frequency could be
made
>slightly higher than if direct-grounding was used.

Rich,

Tell us HOW you measure the grid resonant frequency of the 3-500Z when the
grid is directly grounded. What instrumeentation do you use?

Using my computerized Wiltron network analyzer (which I hope is an
acceptable instrument) I measure the following frequencies and
transmission losses in a cold tube mounted in an AL-80B chassis, with
anode and cathode connections terminated in 50 ohm loads.

No bypass and grids grounded directly:
105.94 MHz (-40.12 dB) parallel grid resonance
168.28 MHz (-82.39 dB) series grid resonance
439.48 MHz (-8.18 dB) parallel grid resonance
and from there almost a straight line to 1 GHz.

SB-220-type mica capacitor bypasses with one inch leads:
129.81 MHz (-32.30 dB) parallel resonance
161.62 MHz (-58.74 dB) series resonance
215.01 MHz (-13.17 dB) parallel resonance
385.46 MHz (-8.24 dB) parallel resonance
575.32 MHz (-30.35 dB) series resonance
611.43 MHz to 1 Ghz an upwardly tilted line to -3.05 dB.

That looks like a major change to me Rich. Both the resonant frequency and
transmission loss changes, and it moves in undesirable directions. IN NO
CASE does the grid isolation become better!

Perhaps that is also why, in the SB-220, inductance can safely be removed
from the parasitic suppressor when the grids are directly grounded through
short leads.

Why do you say it has no effect? Can you explain your method?

73 Tom


From [e-mail] Wed Dec 11 20:12:26 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Suppressor calculations
Date: 3 Dec 1996 22:06:07 GMT
Organization: America Online, Inc. (1-800-827-6364) (1.14)
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Hi Mario
In article <[e-mail]>, [e-mail] (Marijan Miletic)
writes:

>Second resonance beats laws of physics but there are lot of unwanted
side-
>efects with real components.

Not really. Only 500 watt boiling gold 8877 grids and photons beat the
laws of physics. This stuff is simple common sense. The capacitor looks
slightly inductive at that frequency, and inductance increases as the
plates are unmeshed! That does not seem strange to me, the path is
slightly longer and we are above series resonance. We can consider Xc to
be zero at that frequency, and so only the varying path length remains.

>The first one would require capacitance change in the order of 7.8 which
>is impossible in series combination of tube output capacitance and plate
>tuning variable capacitor.

I was looking INTO the anode lead with the network analyzer, to see
exactly what the tube "sees". Keep in mind Mario, the tube is a time
varying resistance. The output capacitance of the tube is in shunt with
this resistance, not in series. We can not place the tube's output
capacitance in series with its' resistance and the tuning capacitor C, it
is in SHUNT with the tube's time varying resistance.

If we need to know what the tube sees as a load, we MUST always view the
system correctly.

>It is frightening to think that 24 & 28 MHz bands are within plate
resonace
>with closed capacitor!  What a quick way to blow suppressors!?

Do not get lost in the "Hollywood method" of ignoring impedances and only
looking at resonances to reach profound conclusions about a complex
system.

The tank appears, to the tube and plate choke, as a few thousand ohms at
the operating frequency. Even if the suppressor IS series resonant, the
power across the suppressor is related to the time integrated value of
current pulled from the tank by the tube. The only bands where this is an
appreciable factor is on 10 and 15 meters, where the tube output
capacitance is part of the tank and larger circulating currents flow
through the suppressor throughout the entire RF cycle. If we can make the
suppressor survive the resonant VAR problem, everything else is simple.

Do not worry about series suppressor resonance because that component is
in series with the tube's time varying resistance and tank impedance at
the operating frequency. We only need worry about parallel suppressor
resonance or circulating currents due to the tube's output C. That is the
real heating problem.

This all makes sense (like the anode swing issue) when you look at it
close enough.

73 Tom


From [e-mail] Wed Dec 11 20:12:27 1996
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From: [e-mail] (R. L. Measures )
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Suppressor calculations
Date: Wed, 04 Dec 1996 11:19:11 -0700
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In article <[e-mail]>, [e-mail]
wrote:

> Hi Rich,
Hello, Mr. Rauch
> In article <[e-mail]>,
> [e-mail] (R. L. Measures ) writes:
>
> >Yes he did Andy.  However I found little difference in the resonant
> >frequency of the grid circuit in a 3-500Z whether the grid was
> >directly-grounded or grounded through capacitors, as is the case in the
> >SB-220.  The inductive reactance of the grid seems to be somewhat
> cancelled
> >by the capacitive reactance of the grid bypass capacitors.  I found that
> >with low values of grid bypass C, the grid resonant frequency could be
> made
> >slightly higher than if direct-grounding was used.
>
> Rich,
>
> Tell us HOW you measure the grid resonant frequency of the 3-500Z when the
> grid is directly grounded. ....snip.....

Rich measures the resonance with a dipmeter, by inductively-coupling the
dipmeter to a grid pin on the tube socket and searching for the dip..
>
> SB-220-type mica capacitor bypasses with one inch leads:
> 129.81 MHz (-32.30 dB) parallel resonance
> 161.62 MHz (-58.74 dB) series resonance
snip...
>
> That looks like a major change to me Rich.

I do not see a comparison.

> Both the resonant frequency and
> transmission loss changes, and it moves in undesirable directions. IN NO
> CASE does the grid isolation become better!
>
> Perhaps that is also why, in the SB-220, inductance can safely be removed
> from the parasitic suppressor when the grids are directly grounded through
> short leads.

I just checked the resonances in my unstock SB-220 which uses 1000pF caps.
to ground the grids.  Directly-grounding the Amperex 3-400Z grids increased
the grid-resonant frequency from 72MHz to 77MHz.  However, when I
originally tried direct-grounding, the occasional bouts of tune capacitor
arcing continued.  This result was not surprising since dirctly-grounding
the grids moved the grid resonance slightly closer the anode circuit's
VHF-resonance.

IMO, there is really no such thing as a 'direct-ground' at RF frequencies.
Even 6-inch wide copper ribbon has  a finite amount of inductance per unit
length.  At 100MHz, roughly 30 inches of such material looks like a high-Z
RFC.at the open end.
----------------------------------
e-mail copies to Mr. Rauch, Mr. Andy Heninger, et al.

--
--Rich-- ag6k, 805-386-3734


From [e-mail] Wed Dec 11 20:12:28 1996
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From: [e-mail] (R. L. Measures )
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Suppressor calculations
Date: Sat, 07 Dec 1996 09:04:44 -0700
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In article <[e-mail]>, [e-mail]
wrote:

> In article <[e-mail]>,
> [e-mail] (R. L. Measures ) writes:
>
> >
> >Rich measures the resonance with a dipmeter, by inductively-coupling the
> >dipmeter to a grid pin on the tube socket and searching for the dip..
>
> You have no idea if you are reading grid resonance, or a resonance effect
> in the leads near the socket. ..........snip

There are no other leads near grid pin #3.


> >IMO, there is really no such thing as a 'direct-ground' at RF
> frequencies.
> >Even 6-inch wide copper ribbon has  a finite amount of inductance per
> unit
> >length.  At 100MHz, roughly 30 inches of such material looks like a
> high-Z
> >RFC.at the open end.
>
> Perhaps you call Z< 100 ohms "high Z". The wider conductor has a lower
> surge impedance, and a lower impedance when resonant.  A thin conductor
> would have high Z, but a six inch wide conductor would look like a low
> impedance.

Tom:  30 inches is a quarter wave.  The feed Z at the ground end of a
quarter wave antenna is roughly 35 ohms.  Are you saying that "<100 ohms"
is the feed Z at the top end of a quarter wave?

A question:  What is the inductance of a six inch wide, flat, thin
copper-conductor, 12 inches long?
---------------------------------
e-mail copies to Mr. Rauch, et al.

--
--Rich-- ag6k, 805-386-3734


From [e-mail] Wed Dec 11 20:12:29 1996
Newsgroups: rec.radio.amateur.homebrew
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From: [e-mail] (Gary Coffman)
Subject: Re: Suppressor calculations
Message-ID: <[e-mail]>
Reply-To: [e-mail] (Gary Coffman)
Organization: Destructive Testing Systems
References: <[e-mail]> <[e-mail]> <[e-mail]>
Date: Mon, 9 Dec 1996 03:21:10 GMT
Lines: 31

In article <[e-mail]> measures@mail.
vcnet.com (R. L. Measures ) writes:
>Even 6-inch wide copper ribbon has  a finite amount of inductance per unit
>length.  At 100MHz, roughly 30 inches of such material looks like a high-Z
>RFC.at the open end.

Right, which is why we wouldn't use a grid lead to ground of 30 inches
in a GG amp. Duh!

OTOH, a direct 10 millimeter path to ground would first appear as a high Z
at 7.5 GHz. With HF power tubes, we can ignore that because transit time
effects won't let them be amplifiers up there.

Of course "ground" can be a nebulous thing. It is just something we
arbitrarily pick to be a zero potential reference. In a GG amp, it
is the grid to chassis connection point by definition. What we are
really concerned about is the length of the cathode and plate
return paths to that point.

In a well laid out amplifier using a compact power grid tube, the
cathode return path can be less than 25 mm (though it is often longer).
That's a high Z at 3 GHz. The path from the plate to the chassis/grid
connection point is usually much longer, about 200 mm or even more,
and that's a high Z at 325 MHz. Capacitive loading can lower that into
VHF, and that's what we have to deal with via suppressors.

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] Wed Dec 11 20:12:32 1996
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From: [e-mail] (Phil Clements)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: SUPPRESSORS??
Date: 8 Dec 1996 16:01:27 GMT
Organization: Your Organization
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In article <[e-mail]>, [e-mail] (W6KKT Jesse
) says:
>
>I'm totally lost regarding the past suppressor threads.  Anyone know a
>SIMPLE way to design suppressors for a pair of 4-1000s, conventional
>grid (AB1) ???  What did the engineers do before HP network analyzers
>etc?
>73, Jesse, W6KKT

I once owned an amp (pair 4-1000A's) made by Eimac/Varian. The
suppressors were made by winding 3 turns of #10 wire around
Carborundum 884 SP500K 50 ohm glo-bar resistors. The clips on the
ends of the resistor served as terminals for the coil and the half-
inch straps leading from the top of the plate choke to the tube anodes.

My own personal design experiences with the 4-1000A:

When running this tube above 5000 volts on the plate it needs some
"taming". Successful solutions were passed down from ham to ham...
putting a 10 ohm resistor in series with a 25 pf cap from each filament
pin to chassis was the most significant cure for squirliness.

I quickly found that small MOF and carbon resistors that I had used in
the past on anode suppressors were quickly "crispy-crittered" when the
amp was operated on 10 meters. The suppressor coil did not get hot, the
resistor did! Even Varian agrees it takes at least a 20 watt resistor
to make a reliable suppressor for this beast. Bottom line:  I think the
engineers took each new amp design as it presented itself, and did what
was necessary to "make it work" by trial and error. (((73))) Phil, K5PC


From [e-mail] Wed Dec 11 20:12:32 1996
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From: [e-mail] (W6KKT Jesse)
Newsgroups: rec.radio.amateur.homebrew
Subject: SUPPRESSORS??
Date: Sun, 08 Dec 1996 14:47:32 GMT
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I'm totally lost regarding the past suppressor threads.  Anyone know a
SIMPLE way to design suppressors for a pair of 4-1000s, conventional
grid (AB1) ???  What did the engineers do before HP network analyzers
etc?
73, Jesse, W6KKT


From [e-mail] Wed Dec 11 20:12:34 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: TEFLON WIRE
Date: Mon, 02 Dec 1996 19:57:21 -0500
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Mil Spec silver plated stranded 22 & 24 AWG high temperature hook up
   wire.
   50' rolls
   5 roll color assortment (250' total) shipped priority 2 day mail $23.
   No color choices at this price, just 5 different colors.

   great for building your own satellite, amplifier, rewiring the space
   shuttle, your own plane, or whatever.

   will not melt when you solder it.
   rated at 200 degrees C and 600v.

   Compare at triple the price. you won't find it cheaper.
   If you find it cheaper I would like to know about it.

   If interested contact [e-mail]

   Jim (N2GO)

  I am interested in trades for amateur equipment for larger quantities.
   I have 1000' rolls for $80 shipped CONUS.


From [e-mail] Wed Dec 11 20:12:34 1996
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From: [e-mail] (Tom Bruhns)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: TEFLON WIRE
Date: 3 Dec 1996 23:33:10 GMT
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[e-mail] wrote:
(posting it for a second time...)
: Mil Spec silver plated stranded 22 & 24 AWG high temperature hook up
:    wire.
:    50' rolls
:    5 roll color assortment (250' total) shipped priority 2 day mail $23.
:    No color choices at this price, just 5 different colors.
:
..
:    Compare at triple the price. you won't find it cheaper.
:    If you find it cheaper I would like to know about it.

Since you asked, and assuming others reading the posting might like to
know too...

Locally, Boeing Surplus has this sort of thing for about $.40/100 feet.
They aren't guaranteed to have it in stock, but seem to pretty often
(as you can imagine from what they build).  You have to go pick it up
there, but I'd guess there are other places around the country that have
similar deals on Teflon insulated wire.  (I've gotten some wonderful
deals on Teflon-insulated coax from Boeing Surplus...)

--
Cheers,
Tom
[e-mail]


From [e-mail] Wed Dec 11 20:12:36 1996
Newsgroups: rec.radio.amateur.homebrew
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!news.sprintlink.net!news-peer.sprintlink.net!news.sprintlink.net!news-hub.sprintlink.net!news.sprintlink.net!news-pen-16.sprintlink.net!eskimo!news
From: [e-mail] (Bill Turner)
Subject: Re: TEFLON WIRE
X-Nntp-Posting-Host: wrt.ndip.eskimo.net
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[e-mail] (Tom Bruhns) wrote:

>
>[e-mail] wrote:
>(posting it for a second time...)
>: Mil Spec silver plated stranded 22 & 24 AWG high temperature hook up
>:    wire.
>:    50' rolls
>:    5 roll color assortment (250' total) shipped priority 2 day mail $23.
>:    No color choices at this price, just 5 different colors.
>:
>..
>:    Compare at triple the price. you won't find it cheaper.
>:    If you find it cheaper I would like to know about it.
>
>Since you asked, and assuming others reading the posting might like to
>know too...
>
>Locally, Boeing Surplus has this sort of thing for about $.40/100 feet.
>They aren't guaranteed to have it in stock, but seem to pretty often
>(as you can imagine from what they build).  You have to go pick it up
>there, but I'd guess there are other places around the country that have
>similar deals on Teflon insulated wire.  (I've gotten some wonderful
>deals on Teflon-insulated coax from Boeing Surplus...)
>
>--
>Cheers,
>Tom
--------------------------------------------------
Amen.  Never, never, never buy something as generic as teflon wire at prices
like that.  Look around and get a bargain.  Keep your eyes open, they're
everywhere.

73, Bill W7TI
[e-mail]


From [e-mail] Wed Dec 11 20:12:37 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: TEFLON WIRE
Date: Wed, 04 Dec 1996 14:12:42 -0500
Organization: University at Buffalo
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Message-ID: <[e-mail]>
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Bill Turner wrote:
>
> [e-mail] (Tom Bruhns) wrote:
>
> >
> >
> >:    Compare at triple the price. you won't find it cheaper.
> >:    If you find it cheaper I would like to know about it.
> >
> >Since you asked, and assuming others reading the posting might like to
> >know too...
> >
> >Locally, Boeing Surplus has this sort of thing for about $.40/100 feet.
> >They aren't guaranteed to have it in stock, but I'd guess ...)
> >
> >> >Cheers,
> >Tom
> --------------------------------------------------
> Amen.  Never, never, never buy something as generic as teflon wire at prices
> like that.  Look around and get a bargain.  Keep your eyes open, they're
> everywhere.
>
> 73, Bill W7TI
> [e-mail]



GEE,
I guess you don't need any wire Bill.
List your sources with addresses and shipping costs. I think the readers
might find that a little more useful than pretentious statements.

Sincerely,

Jim N2GO


From [e-mail] Wed Dec 11 20:12:38 1996
Newsgroups: rec.radio.amateur.homebrew
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!www.nntp.primenet.com!nntp.primenet.com!swrinde!ihnp4.ucsd.edu!news.service.uci.edu!unogate!mvb.saic.com!eskimo!news
From: [e-mail] (Bill Turner)
Subject: Re: TEFLON WIRE
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[e-mail] wrote:
>
>GEE,
>I guess you don't need any wire Bill.
>List your sources with addresses and shipping costs. I think the readers
>might find that a little more useful than pretentious statements.
>
>Sincerely,
>
>Jim N2GO
--------------------------------------------------
Ok, will do.  My #1 source is Boeing surplus.  My other favorite surplus
outlets in the Seattle area are Vetco in Bellevue and Electronic Dimensions in
Tacoma.  Both of them have tons (literally) of surplus.  Vetco is especially
good for wire and cable.  As to shipping charges, who knows?  I pick it up
myself.  UPS will be glad to quote you if you wish.  They're in the phone
book.

And of course, there are always hamfests - perhaps the best source of all.

73, Bill W7TI
[e-mail]


From [e-mail] Wed Dec 11 20:12:39 1996
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From: [e-mail] (David Allen)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: TEFLON WIRE
Date: Thu, 05 Dec 1996 21:25:50 GMT
Organization: AT&T WorldNet Services
Lines: 28
Message-ID: <[e-mail]>
References: <[e-mail]> <582dbm$[e-mail]> <[e-mail]> <[e-mail]> <[e-mail]>
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[e-mail] (Bill Turner) wrote:

>[e-mail] wrote:
>>
>>GEE,
>>I guess you don't need any wire Bill.
>>List your sources with addresses and shipping costs. I think the readers
>>might find that a little more useful than pretentious statements.
>>
>>Sincerely,
>>
>>Jim N2GO
>--------------------------------------------------
>Ok, will do.  My #1 source is Boeing surplus.  My other favorite surplus
>outlets in the Seattle area are Vetco in Bellevue and Electronic Dimensions i
n
>Tacoma.  Both of them have tons (literally) of surplus.  Vetco is especially
>good for wire and cable.  As to shipping charges, who knows?  I pick it up
>myself.  UPS will be glad to quote you if you wish.  They're in the phone
>book.
>
>And of course, there are always hamfests - perhaps the best source of all.
>
>73, Bill W7TI
>[e-mail]


Thanks for info.  Does Boeing Surplus have a catalog or telephone
number?


From [e-mail] Wed Dec 11 20:12:40 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.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.homebrew
Subject: Re: TEFLON WIRE
Date: 6 Dec 1996 15:39:12 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]

Well Tom, I'm happy for you that you live next door to Boeing and can take
advantage of the govt's largesse that we're both paying for. Not all of us
can do that. I got some of this guys  wire, (when he advertised it in the
QRP-L ) and am very happy to get it. I used to manufacture Power
transformers, and we used a bunch of this stuff, and paid thru the nose
for it new. I had brought some with me when I retired, but was running low
and am happy to be able to buy it at 10 percent of DigiKey and Mousser
prices.

If you didn't need it, you didn't have to be snippy about it. Matter of
fact, I'll make you a standing offer, make me up 100 foot put ups of the
stuff you get, send it priority, and sell it to me cheaper, and I'll buy
from you. You too Bill,

W4ZCB


From [e-mail] Wed Dec 11 20:12:41 1996
Newsgroups: rec.radio.amateur.homebrew
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!netcom.com!mzenier
From: [e-mail] (Mark Zenier)
Subject: Re: TEFLON WIRE
Message-ID: <[e-mail]>
Organization: NETCOM On-line Communication Services (408 261-4700 guest)
References: <[e-mail]> <582dbm$[e-mail]> <[e-mail]> <[e-mail]> <[e-mail]> <[e-mail]>
Date: Sat, 7 Dec 1996 00:20:16 GMT
Lines: 27
Sender: [e-mail]

in <[e-mail]>, David Allen wrote:
: Thanks for info.  Does Boeing Surplus have a catalog or telephone
: number?

They don't know what they have, or at least don't care.  That's why it's
so cheap.  Nothing really great stays around long enough to put in a
catalog.  (Sometimes they do have catalogs for bid lot auctions).

They were or are closed Monday, and the best pickings were on Tuesday.
It's kind of strange to be out in the parking lot in an industrial park
on Tuesday morning watching the crowd form.  Usually about 50 to 100
techies, hams, machinists, all waiting for the doors to open.

Pickings can be very variable.  Sometimes it's just old drill bits,
office desks,  computers and chunks of aluminum, sometimes you find the
widget you've been looking for for years.

20651 84th S.
Kent, Washington

(206?) 393-4060  (The area code is due to change in the next year or sooner).

For a description of the surplus stores around the country, including one
I did about the Seattle area, check out http://www.paranoia.com/~filipg/

Mark Zenier  [e-mail]  [e-mail]



From [e-mail] Wed Dec 11 20:12:42 1996
Newsgroups: rec.radio.amateur.homebrew,rec.radio.amateur.misc
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.bbnplanet.com!su-news-hub1.bbnplanet.com!www.nntp.primenet.com!nntp.primenet.com!ix.netcom.com!netcom.com!n1ist
From: [e-mail] (Michael L. Ardai)
Subject: Tektronix 491 question
Message-ID: <[e-mail]>
Organization: Utopia Planetia Shipyards - Mars
Date: Fri, 6 Dec 1996 18:38:53 GMT
Lines: 17
Sender: [e-mail]
Xref: news1.epix.net rec.radio.amateur.homebrew:21786 rec.radio.amateur.misc:119786


I recently picked up a Tek 491 spectrum analyzer at a flea.  It seems
to be working fine, but I have one question:  How do you calibrate the
vertical (signal strength) scale?  Short of having a signal generator
of known amplitude at the desired frequency, I haven't figured out
how.  Right now, I'm using it to measure 860 MHz signal strength around
the apartment to see how much is coming in from a new SMR site being
installed 25' above us...

Also, any recommendations for who to get a user and service manual from?
Thanks and 73.
/mike

--
\|/      Michael L. Ardai        N1IST       [e-mail]       \|/
-*- ===  Boston Amateur Radio Club:  http://www.barc.org/barc   === -*-
/|\    or send "info barc-list" to [e-mail]     /|\


From [e-mail] Wed Dec 11 20:12:44 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!usenet.eel.ufl.edu!news.ultranet.com!NewsWatcher!user
From: [e-mail] (Jon Goguen)
Newsgroups: rec.radio.amateur.homebrew,rec.radio.amateur.misc
Subject: Re: Tektronix 491 question
Date: 7 Dec 1996 01:15:49 GMT
Organization: UltraNet Communications, Inc.
Lines: 23
Message-ID: <acj-0612962023460001@205.246.8.86>
References: <[e-mail]>
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Xref: news1.epix.net rec.radio.amateur.homebrew:21812 rec.radio.amateur.misc:119884

In article <[e-mail]>, [e-mail] (Michael L.
Ardai) wrote:

> I recently picked up a Tek 491 spectrum analyzer
>How do you calibrate the vertical (signal strength) scale?

The amplitude scale is strictly relative, unless you do use a calibrated
source as reference.  That's the downside of the 491 as compared to the
old HP141T systems.  On the other hand, the 491 is smaller and lighter.

> Also, any recommendations for who to get a user and service manual from?

Buy one from Ed Matsuda (619-479-0225).  He may or may not have an
original, but his copies are of good quality and his prices are
reasonable.

> Thanks and 73.
> /mike
>
> --
> \|/      Michael L. Ardai        N1IST       [e-mail]       \|/
> -*- ===  Boston Amateur Radio Club:  http://www.barc.org/barc   === -*-
> /|\    or send "info barc-list" to [e-mail]     /|\


From [e-mail] Wed Dec 11 20:12:44 1996
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From: George Baker <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew,rec.radio.amateur.misc
Subject: Re: Tektronix 491 question
Date: Sat, 07 Dec 1996 00:21:14 -0600
Organization: Southwestern Bell Internet Services
Lines: 12
Message-ID: <[e-mail]>
References: <[e-mail]> <acj-0612962023460001@205.246.8.86>
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Xref: news1.epix.net rec.radio.amateur.homebrew:21823 rec.radio.amateur.misc:119934

Jon Goguen wrote:
>

> > Also, any recommendations for who to get a user and service manual from?
> Look up Tucker Electronics on Yahoo or whatever. They are a very large used
test
equipment outfit in Dallas, TX and have extensive files of Tektronix docs. Wil
l cost
some $$$ but I would bet that they have it.

--
73, George
W5YR
Fairview, TX


From [e-mail] Wed Dec 11 20:12:45 1996
Path: news1.epix.net!news3.epix.net!uunet!in2.uu.net!205.252.116.190!feed1.news.erols.com!howland.erols.net!usc!news.cerf.net!hacgate2.hac.com!news.delcoelect.com!usenet
From: Chris Nicholson <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew,rec.radio.amateur.misc
Subject: Re: Tektronix 491 question
Date: Sat, 07 Dec 1996 09:43:39 -0500
Organization: Delco Electronics
Lines: 22
Distribution: usa
Message-ID: <[e-mail]>
References: <[e-mail]>
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Michael L. Ardai wrote:
>
> I recently picked up a Tek 491 spectrum analyzer at a flea.  It seems
> to be working fine, but I have one question:  How do you calibrate the
> vertical (signal strength) scale?  Short of having a signal generator
> of known amplitude at the desired frequency, I haven't figured out
> how.  Right now, I'm using it to measure 860 MHz signal strength around
> the apartment to see how much is coming in from a new SMR site being
> installed 25' above us...
>
> Also, any recommendations for who to get a user and service manual from?
> Thanks and 73.
> /mike
>
> --
> \|/      Michael L. Ardai        N1IST       [e-mail]       \|/
> -*- ===  Boston Amateur Radio Club:  http://www.barc.org/barc   === -*-
> /|\    or send "info barc-list" to [e-mail]     /|\
        Mike, I also have a tek 491. It's OK but as you say, it's only
good for relative measurements. so you'll need that generator for
absolute measurements.
                                73 Chris


From [e-mail] Wed Dec 11 20:12:46 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!news.kei.com!newsfeed.internetmci.com!howland.erols.net!news.bbnplanet.com!cam-news-hub1.bbnplanet.com!uunet!in3.uu.net!165.87.194.248!news-m01.ny.us.ibm.net!news-s01.ca.us.ibm.net!not-for-mail
From: Larry or David Gibbs <[e-mail]>
Newsgroups: rec.radio.amateur.equipment,rec.radio.amateur.homebrew
Subject: Re: Ten-Tec 2 meter FM transceiver
Date: Sun, 01 Dec 1996 21:58:25 -0800
Lines: 13
Message-ID: <[e-mail]>
References: <01bbdfad$a66e3fc0$[e-mail]>
NNTP-Posting-Host: slip129-37-234-154.pa.us.ibm.net
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Xref: news1.epix.net rec.radio.amateur.equipment:43474 rec.radio.amateur.homebrew:21648

Trish Cowgar wrote:
>
> Does anyone have any input on the Ten-Tec 2 meter FM Transceiver that you
> assemble from a kit?

Trish,

Read the review in June 1996 QST, page 61. They liked it.

There have been many positive comments on this newsgroup. I'm
thinking of building one myself as an extra rig.

73, Larry W3UIO


From [e-mail] Wed Dec 11 20:12:48 1996
Newsgroups: rec.radio.amateur.equipment,rec.radio.amateur.homebrew
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!news.kei.com!newsfeed.internetmci.com!news.bbnplanet.com!cpk-news-hub1.bbnplanet.com!news.mindspring.com!mindspring!cssun.mathcs.emory.edu!news.radio.org!wa4mei!ke4zv!gary
From: [e-mail] (Gary Coffman)
Subject: Re: Ten-Tec 2 meter FM transceiver
Message-ID: <[e-mail]>
Reply-To: [e-mail] (Gary Coffman)
Organization: Destructive Testing Systems
References: <01bbdfad$a66e3fc0$[e-mail]>
Date: Mon, 9 Dec 1996 01:26:24 GMT
Lines: 52
Xref: news1.epix.net rec.radio.amateur.equipment:43945 rec.radio.amateur.homebrew:21890

In article <01bbdfad$a66e3fc0$[e-mail]> "Trish Cowgar" <tris
[e-mail]> writes:
>Does anyone have any input on the Ten-Tec 2 meter FM Transceiver that you
>assemble from a kit?

It is a good kit. If you want to build a kit radio, this is the one
to buy. But it is a pretty plain radio. If you want the most bang for
the buck, you'll go another way. There are two alternates. You can
retune commercial surplus radios. This gives you a very high performance
radio at a very low cost. Of course it will have even less features
and frills than the Ten-Tec. Or you can buy a Japanese radio. There
are several in approximately the Ten-Tec price range, and they offer
many more features and frills. A very few of them even offer better
performance than the Ten-Tec kit.

>Also, I am wanting to get into packet, and I notice that this rig has a
>1200 baud packet-ready din on the rear. Being in computers, I am use to
>28.8, 56k, etc. Is 1200 baud useable, does packet go any faster?

1200 baud is *barely* usable. It depends on your temperment and what
you want to do. For unattended Email forwarding, it is Ok. But for
many interactive uses it is intolerably slow. Unfortunately, it
represents the lowest common denominator among amateurs, so you'll
find yourself limited in the number of stations you can contact if
you get something faster. It will work through any voice grade FM
radio without modification. Having the jack on the back is a
convienence, but not a necessity. You can just hook a 1200 baud
modem to microphone and speaker connections instead.

Faster packet does exist. As a matter of fact, I was easedropping
on a couple of our 56 kb LAN users this afternoon while they were
exchanging live realtime digital video with CuCme. You can't do fast
packet with a voice grade FM radio anyway, you need a real RF modem
like the GRAPES modem, so you shouldn't let that drive your voice
radio choice.

OTOH, there is 9.6 kb packet. This *can* work through some, a
very few, voice grade radios, and many amateurs try. But most
of the so-called "9600 baud ready" voice radios are *not* in fact
suitable for 9600 baud operation. They have a connector labeled
"9600 baud", and advertising hype claiming they will work, but
they don't, and generally *can't* work properly at 9600 baud.
This is because of the way modulation is introduced into the
synthesizer loop.  Again, a dedicated data radio, like the
inexpensive Tekk KS900, is the proper way to go, so don't let
this drive your voice radio choice either.

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] Wed Dec 11 20:12:49 1996
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!zombie.ncsc.mil!newsgate.duke.edu!agate!howland.erols.net!feed1.news.erols.com!insync!uunet!in2.uu.net!134.62.48.22!news.tek.com!gazette!not-for-mail
From: [e-mail] (Ed Burress)
Newsgroups: rec.radio.amateur.equipment,rec.radio.amateur.homebrew
Subject: Re: Ten-Tec 2 meter FM transceiver
Date: 9 Dec 1996 14:08:48 -0800
Organization: Tektronix, Inc., Wilsonville,  OR.
Lines: 23
Message-ID: <[e-mail]>
References: <01bbdfad$a66e3fc0$[e-mail]> <[e-mail]>
NNTP-Posting-Host: sepia.wv.tek.com
Xref: news1.epix.net rec.radio.amateur.equipment:43972 rec.radio.amateur.homebrew:21900

In article <[e-mail]> [e-mail] (Gary
Coffman) writes:
>
snip
>
>OTOH, there is 9.6 kb packet. This *can* work through some, a
>very few, voice grade radios, and many amateurs try. But most
>of the so-called "9600 baud ready" voice radios are *not* in fact
>suitable for 9600 baud operation. They have a connector labeled
>
snip

Has anyone built the Ramsey 440 MHz transciever, and used it successfully
for 9600 baud packet operation?  Did it work as advertised, or are there
mods necessary to get it to work?  Their catalog says "9600 - no problem".
Does that mean "works fine, no problem" or "no problem, not a chance"?
Anyone use one of these as the basis for a repeater? Can you use the
Tx and Rx side at the same time? I suspect that the synthesizer can only
handle one side at a time, but I've never even seen one of these rigs.
Anybody?

Thanks,
Ed Burress
KC7GFX


From [e-mail] Wed Dec 11 20:12:50 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!vixen.cso.uiuc.edu!ais.net!noc.van.hookup.net!laslo.netnet.net!news
From: [e-mail] (Mark)
Newsgroups: rec.radio.amateur.homebrew
Subject: test
Date: Fri, 06 Dec 1996 17:15:57 GMT
Organization: NetNet, Inc.
Lines: 11
Message-ID: <58avkd$[e-mail]>
NNTP-Posting-Host: 198.70.72.30
X-Newsreader: Forte Free Agent 1.0.82



All prices are plus shipping

Mark Olson "KE9PQ" 1490 Norfield Rd.
Suamico,Wi. 54173
Call [phone] after 6:00pm central time.
Email [e-mail]  Thanks and 73   Mark
NOTE: All items listed are guaranteed to be
as described or your money back.



From [e-mail] Wed Dec 11 20:12:52 1996
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From: james brunelle <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: TEST EQUIPMENT for SALE
Date: 8 Dec 1996 19:37:39 GMT
Organization: Multi-Medias Quebec
Lines: 36
Message-ID: <58f5e3$[e-mail]>
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l) DECADE RESISTANCE BOX'S FOR SALE MODEL 63

   Description:
   The Model 63 Precision Decade makes possible the selection of any
   resistor value from 1 ohm to 999 ohm in 1 ohm steps.  The resistor
   elements are housed in a sealed bakelite box and are non inductively
   wound on porcelaine tubes.  This unit is suitable for use in electri-
   cal measurements, substitution resistor's to aid in designing and for
   experimentation in schools and research institutes.  Ranges 0-9x
   units, tnes, hundreds, thousand ohms.  Precision .1% resistor elements
   Manufactured by Brunelle Instruments Inc.  Price $29.00 each (Qty only
   24 on hand).  Manufacturing overrun (NEW).

2) REGULATED BENCH POWER SUPPLY - MODEL 1030

   DESCRIPTION:
   The Model 1030 is 0-18V, 0-3A, adjustable, dual meters, regulation
   .01%.  TOP QUALITY SUPPLIES (NOT CLUNKERS) Mfg by Instek. $189.00 NEW

3) PULSE GENERATOR - MODEL 3060

   DESCRIPTION:
   Can be used with an Oscilloscope for adjustable sweep delay, TTL/CMOS
   LEVEL (output adjustable), built-in Logic Tester, Pulse period range
   of 100 nS to 0.1S, Frequency range 0.5 Hz to 5Mhz. Operating modes:
   Run, Trigger, gAte, One Shoot, Square, Invert.  MFG by Instek. $159.00
   NEW

If interested send address or fax no. for complete spec sheets.

JIM BRUNELLE <[e-mail]> Tel: [phone],
l-819-838-5854,
fax l-819-569-1408.

   hand - 24



From [e-mail] Wed Dec 11 20:12:54 1996
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From: [e-mail] (Mike Willis)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: TIPS: C.W. 2.4 GHz 10 KWh Dummy Load
Date: Thu, 05 Dec 1996 23:12:44 GMT
Organization: Rutherford Appleton Laboratory, Oxon, UK
Lines: 9
Message-ID: <[e-mail]>
References: <[e-mail]>
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On 30 Nov 1996 17:57:34 GMT, [e-mail] wrote:

>Dear Forum Members:
>
>I am looking for some quick ideas to build a C.W. 10 KWh, 2.4 GHz
>MW dummy load, perhaps you have some suggestions.
>
Very funny. Try a frozen chicken in a microwave. Even better some
frozen sprouts.


From [e-mail] Wed Dec 11 20:12:56 1996
Newsgroups: rec.radio.amateur.homebrew
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From: [e-mail] (Patrick Croft)
Subject: Re: TL922 Arcing/Oscillating? Help
X-Nntp-Posting-Host: ind-0003-11.iquest.net
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References: <01bbdf11$127339c0$[e-mail]> <[e-mail]> <01bbdf8b$5227aa40$[e-mail]>
Date: Tue, 3 Dec 1996 16:35:29 GMT
Lines: 65

In article <01bbdf8b$5227aa40$[e-mail]>,
   "David B. Holtkamp (K5KH)" <[e-mail]> wrote:
>Thanks for the reply, Tom. Here are some comments and further questions:
>
>> Remember the power control is via the ALC system. The contol voltage is
>> derived from an RF output detector that feeds a voltage comparison
>system.
>> When the output power detected by the detector if the detector voltage
>> exceeds a reference voltage, ALC is developed.
>>
>> When the rig is at rest, or on receive, the ALC voltage is at zero. The
>TX
>> system is at full gain. It takes several RF cycles before the ALC voltage
>> can climb and limit drive.
>>
>
>  Hmmm... Is this true even when not driving the linear? When I adjust the
>power output
>of the transceiver via the front panel control, am I adjusting the ALC
>somehow? I didn't
>think this was the case.
>
>
>
>> I'm not surprised by this. Does Kenwood warn you to overcouple the PA
>> slightly before advancing drive? If not, they should. This problem is
>> compounded by the fact the 940 certainly has power "overshoot". The load
>> control should always be operated beyond the setting where maximum output
>> occurs, and you should never depend ALC to keep the power reduced. The
>> ALC/ power control system is just too slow.
>
>  Appears that Kenwood does not recommend overcoupling the PA before
>advancing
>the drive. The only recommendation for the load setting when initially
>tuning is
>to put the load control at 12:00 and start there.
>
>
>
>> You are using the 922 at the worst possible condition for arc prevention
>> when you run low power at high anode voltage.
>
>  Hmmm...but an arc never (or at least never that I can recall) under these
>conditions on
>my rig at least. Wonder what is going on here...
>
>
>>
>> Yes, but you need a storage scope or a very good very fast peak reading
>> meter. Even a Bird 43P is on the slow side for this. There is no doubt
>you
>> have the problem, because I've yet to see a modern rig that doesn't.


Your question and answer posting is a good reminder for all on ANY amp - and t
he additional point worth
checking-numbers (scales) on front panels vary from brand to brand!  Either ch
eck the manual or
(preferred method!) look under the hood!  With power off of course, visually s
ee if capacitor is fully
closed (max cap) at the high or low scale on the front panel.

Keep asking questions and you'll keep pulling out answers!

Good luck!

Patrick
WB9IQI



From [e-mail] Wed Dec 11 20:12:56 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: TL922 Arcing/Oscillating? Help with diagnosis?
Date: 2 Dec 1996 17:33:24 GMT
Organization: America Online, Inc. (1-800-827-6364) (1.13)
Lines: 10
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References: <[e-mail]>
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In article <[e-mail]>,
[e-mail] writes:

>It absolutely is, the Kenwood I have overshoots into the 250-300 watt
>range on some bands.

Evidently this overshoot is an elusive culprit tearing up jack.
Pleae explain the sparkgap you use Tom.

Carl


From [e-mail] Wed Dec 11 20:12:57 1996
Newsgroups: rec.radio.amateur.homebrew
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From: [e-mail] (Gary Coffman)
Subject: Re: TL922 Arcing/Oscillating? Help with diagnosis?
Message-ID: <[e-mail]>
Reply-To: [e-mail] (Gary Coffman)
Organization: Destructive Testing Systems
References: <[e-mail]> <[e-mail]> <[e-mail]>
Date: Mon, 9 Dec 1996 02:12:59 GMT
Lines: 43

In article <[e-mail]> measures@mail.
vcnet.com (R. L. Measures ) writes:
>In article <[e-mail]>, [e-mail]
>wrote:
>
>snip...
>> The 3--500Z's do not saturate until they reach a peak anode current of
>> perhaps 10 amperes per tube. That means the tubes give the tank a big hard
>> "yank" and allow it to overshoot.
>
>According to Eimac Chart #4264 for the constant current characteristics for
>a 3-500Z in grounded-grid configuration,  the highest anode current shown
>is 1.8 amperes.  Currents above 1.2 amperes are in saturationville.  The
>smallest tube I am aware of that is capable of 10 peak amperes of anode
>current in linear amplifier service is the 4CX10,000D/8171.  You seem to be
>transplanting the capabilities.
>
>> Rich, I've heard you say that before. The dact is a 3-500Z can output 5-10
>> kW before saturating.
>
>I do not recall saying this, Tom.
>  From personal experience, I know that a healthy 3-500Z begins to saturate
>when it driven very much above 400mA (approx. equal to 1.2 peak amps)  of
>average anode current.  Eimac rates the max. avg. anode current at 400mA.
>4000v at 420mA is not likely to produce 5kW to 10kW before saturation
>occurs.  IMO, a 3-500Z can produce about 1100W of clean RF with a 4000v
>anode supply.

Rich, you cannot use average ratings directly to determine transient
peak performance. If you look at the performance specifications for
any tube in *pulse* service, you'll note that the peak pulse power
is many times the average sustained power. A transient overshoot
is a *pulse*. It represents an unsustainable discharge of stored
energy in the tank and power supply. Even quite small tubes can
have peak pulse powers in the megawatts. But of course the repetition
rate has to be quite low to allow the tube cathode, and the tank
and power supply, to recover, so average power remains low.

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] Wed Dec 11 20:12:59 1996
Newsgroups: rec.radio.amateur.homebrew
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!news.kei.com!newsfeed.internetmci.com!su-news-hub1.bbnplanet.com!news.bbnplanet.com!cpk-news-hub1.bbnplanet.com!news.mindspring.com!mindspring!cssun.mathcs.emory.edu!news.radio.org!wa4mei!ke4zv!gary
From: [e-mail] (Gary Coffman)
Subject: Re: TL922 Arcing/Oscillating? Help with diagnosis?
Message-ID: <[e-mail]>
Reply-To: [e-mail] (Gary Coffman)
Organization: Destructive Testing Systems
References: <[e-mail]> <[e-mail]>
Date: Mon, 9 Dec 1996 01:46:59 GMT
Lines: 28

In article <[e-mail]> [e-mail] wri
tes:
>Anyone thinking because they set the rig to "X" power it only outputs that
>much, or that ALC and power control reduction is a good way to eliminate
>splatter, is mistaken. The WORSE thing to do is reduce the power via those
>means. that virtually guarantees splatter, power overshoot and PA arcing.

Many amateurs tend to treat ALC as if it were a RF speech compressor.
In a sense it is, but it is generally a poor one. It is better to set
the exciter drive to the desired level and leave it that way. With some
radios, you can do that by feeding a fixed voltage to the ALC input.
With others that won't work because of the way they handle the ALC
internally. These radios require modification to reduce drive.

Rather than dissipate a 100 watts in a resistor, it often makes
sense to dissipate a fraction of a watt in the pre-driver of the
rig instead. Adding a small switched attenuator here can allow
you to set output power virtually anywhere you like, and have
confidence it will stay there. If you want speech compression,
a form of distortion, then you can add that too. For myself, I
think linear amplifiers should perform linearly, and not be
used as non-linear distortion generators.

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] Wed Dec 11 20:13:00 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Touch lamp noise
Date: 5 Dec 1996 13:09:33 GMT
Organization: America Online, Inc. (1-800-827-6364) (1.14)
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In article <[e-mail]>, Bob Miller <[e-mail]>
writes:

>       Had same experience.  Best to dig large hole and bury with quick
lime.
>Tell XYL that house was robbed and then buy her nice conventional lamps.
>No hope with those nasty things without massive filters.  But then hope
>springs eternal.

Actually, most of them include switches that are sufficiently rated to
turn the lamp on and off at full power.  Deleting the touch circuitry, and
wiring up the lamp as a regular turn on/turn off lamp works quite well.
If you really want a quiet solution, and a two level lamp, i.e. full
brightness, and almost half, a diode (at least 400 PIV & 6 Amps for
surviving just normal usage) and a dual position switch work quite well.
Since most people don't want less than about half of full brightness, it's
a much better solution than playing with triacs and the like and doesn't
produce lots of RF noise.

I sometimes consider petitioning the FCC to ban such junk from the U.S.
market, because it interferes with working reliable rf gear without need,
but it's now pointless, people want their dimmers, and touch lamps
regardless of what people they consider  faceless guv'mint buro crats say
should happen.  -art clemons-  n8blk/3


From [e-mail] Wed Dec 11 20:13:01 1996
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From: [e-mail] (BOB ROACH)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Transformer For Power
Message-ID: <[e-mail]>
Date: Mon, 02 Dec 96 07:09:00 -0500
Distribution: world
Organization: SelectiveSourceBBS Virginia Beach [phone]
Reply-To: [e-mail] (BOB ROACH)
References: <[e-mail]>
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 -=> Quoting Dave Morrow to All <=-

 DM>  @FROM   :[e-mail]
 DM> than I thought. I'm looking for a 120v primary and 20v - 25v 10amp
 DM> secondary or something close. Of the places I've called they don't
 DM> carry it or they want $200.00 for it.

 DM> Any words of advise? Any ideas as to where to find a transformer at a
 DM> cut rate price?

Hi Dave,

You can achieve the desired current by paralleling two or more secondaries
of the same voltage and current rating.  For example two 24V 6A xformers
will yeild 24V at 12A.  The only thing you have t watch is that all of
the units are in phase.  If two transformers are used and they are out
of phase they will cancel out to 0V.  With more than two units the
possibilities are more diverse but easy enough to figure out.

73
Bob
KE4QOK




... Two most common elements in the universe: Hydrogen & Stupidity.
___ Blue Wave/DOS v2.30 [NR]


From [e-mail] Wed Dec 11 20:13:02 1996
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From: [e-mail] (Multi-Volti Devices)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Transformer For Power Supply
Date: Mon, 02 Dec 1996 06:29:19 GMT
Organization: Hope College
Lines: 64
Message-ID: <57tstc$[e-mail]>
References: <[e-mail]> <[e-mail]> <[e-mail]>
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X-Newsreader: Forte Free Agent 1.0.82

"Richard F. Gillette" <[e-mail]> wrote:
====================
If you want a 20 A DC load capability, you don't want a 10 A
transformer, you want a transformer that will deliver the 20 A!
Watch out for AC rating s and DC load ratings on transformers, because
they are not the same, due to the difference in current waveform.
(Please, no arguments about DC in transformers...it should be obvious
I'm referring to the load current after rectification. The current
seen by the diodes and transformer looks a great deal different than
the load current, in terms of duty cycle and waveshape. This is why
transformers can be rated differently.)

RF Gillette's idea of stacking power supplies is cool method of
recycling cheap supplies. I'd recommend using linear ones and not
switchers, for one. Two, you may not have the same regulation, as you
are tripling (possibly more due to wiring) the output impedance
compared to a single supply, and lastly, use plenty of RF bypassing so
you don't have your output voltage go out of regulation due to RF
getting back into the regulator(s).


====================
>Brian Kline wrote:
>>
>> Dave Morrow wrote:
>> >
>> > I'm trying to build a 13.8v 20amp power supply and I'm having difficulty
>> > locating a transformer. This project may be more difficult than I
>> > thought. I'm looking for a 120v primary and 20v - 25v 10amp secondary or
>> > something close. Of the places I've called they don't carry it or they
>> > want $200.00 for it.
>> >
>> > Any words of advise? Any ideas as to where to find a transformer at a
>> > cut rate price?
>> >
>> > Help!!
>> > Thanks, Dave
>>
>If you can find 5v. 20a. power supplies cheep (most ham fests
>have them) look at using 3 in seties with their outpur adjusted
>to 4.5/6 v. (3 times 4.57 = 13.71v).  Keep all floating from
>chassis except the return of the first one.

>
>110  >>   4.57  + 13.7v  >
>                -
>                | jumper
>110  >>   4.57  +
>                -
>                | jumper
>110  >>   4.57  +
>                - gnd    >

>I have used same for club station and has worked without problems
>for the last 3 years.  I used 3 @ 5v 35a and it feeds 2mtr/440 35w
>100W hf and tnc.   73 W9PE
>--
>Richard F. Gillette P.E.,   Board Member, Harper C.C.     \\////
>RF gillette inc. PO Box 1605, Palatine, IL 60078-1605     ( OO )
>[e-mail], v)847-526-2626, f)847-526-2944 oo00=={}==00oo=

[e-mail]
http://www.softhouse.com/users/uptown/multi-volti/mvd.htm



From [e-mail] Wed Dec 11 20:13:03 1996
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From: Roland Burgan <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Transistor equivelents
Date: Mon, 02 Dec 1996 16:10:39 -0500
Organization: up.net
Lines: 22
Message-ID: <[e-mail]>
References: <57q0hm$[e-mail]> <57rckm$[e-mail]>
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Stephen Muther wrote:
>
> In article <57q0hm$[e-mail]>,
> Paul Mooney <[e-mail]> wrote:
> >Hi everyone,
> >
> >I'm looking for a source of transistor equivelents on the Net.
> >I've tried all the search machines I know but got no joy.
> >
> >Is there anyone out there who could point me in the right direction,
> >please?
> >
> >73s de Paul G7SPV
> >
>
> If by these you mean spice models or S parameters for RF transistors
> I have not seen any on the usual corporate websites yet.  I know
> you can get them on disk from Motorola, NEC and HP for the asking.
> I would try your local rep.  Hopefully, they will appear on the web
> eventually.
>
> Steve M.  WF6Rhttp://www.nteinc.com/distlink.html


From [e-mail] Wed Dec 11 20:13:04 1996
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From: Roland Burgan <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Transistor equivelents
Date: Tue, 03 Dec 1996 15:43:42 -0500
Organization: up.net
Lines: 15
Message-ID: <[e-mail]>
References: <57q0hm$[e-mail]> <57rckm$[e-mail]> <[e-mail]>
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Roland Burgan wrote:
>
> Stephen Muther wrote:
> >
> > In article <57q0hm$[e-mail]>,
> > Paul Mooney <[e-mail]> wrote:
> > >Hi everyone,
> > >
> > >I'm looking for a source of transistor equivelents on the Net.
> > >I've tried all the search machines I know but got no joy.
> > >
> > >Is there anyone out there who could point me in the right direction,
> > >please?

http://www.nteinc.com/distlink.html


From [e-mail] Wed Dec 11 20:13:05 1996
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From: [e-mail] (Steve McDonald)
Newsgroups: rec.radio.amateur.homebrew
Subject: VHF Slugs
Date: Fri, 06 Dec 1996 04:42:22 GMT
Organization: HookUp Communication Corporation, Vancouver, BC, CANADA
Lines: 5
Message-ID: <[e-mail]>
NNTP-Posting-Host: i2m.deepcove.com
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Does anyone know of a source for miniature vhf ferrite slugs? I have
ben stripping them from old vcrs'and TVs' for making slug-tuned coils.
I would like to bulk purchase some if anybody can help.

Steve / VE7SL


From [e-mail] Wed Dec 11 20:13:06 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: VHF Slugs
Date: 6 Dec 1996 21:09:29 GMT
Organization: AOL http://www.aol.com
Lines: 20
Message-ID: <[e-mail]>
References: <[e-mail]>
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Steve, do you really mean iron powder slugs for VHF?

Not being picky but it may ID them better for you.

You might get what you need from Coilcraft.

Coilcraft
Cary, IL 60013

312-689-2361 I think the area code has changed.

Some years ago they sent me an engineers kit that
included all kinds of coils with extra slugs.
It they still exist, try 'em.



Carl
The2x4
N9EFJ


From [e-mail] Wed Dec 11 20:13:07 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!vixen.cso.uiuc.edu!usenet
From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Wanted: CAD Software
Date: 3 Dec 1996 19:19:02 GMT
Organization: University of Illinois at Urbana
Lines: 11
Message-ID: <581uf6$[e-mail]>
NNTP-Posting-Host: firefly.prairienet.org

I am looking for PC software for front panel design.
Of course, AutoCAD is available, but for my homebrew
designs a bit pricey!!

Does anyone have any suggestions regarding shareware
or commercial programs that are not too costly?

Vy 73,
Don Allen W9CW

--


From [e-mail] Wed Dec 11 20:13:07 1996
Path: news1.epix.net!news3.epix.net!uunet!in1.uu.net!206.149.24.18!excalibur.flash.net!not-for-mail
From: [e-mail] (Kerry Miller)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Wanted: CAD Software
Date: Wed, 04 Dec 1996 02:32:46 GMT
Organization: Flashnet Communications
Lines: 26
Message-ID: <582nrr$bp9$[e-mail]>
References: <581uf6$[e-mail]>
NNTP-Posting-Host: iasc2-111.flash.net
X-Newsreader: Forte Free Agent 1.0.82

[e-mail] wrote:

>I am looking for PC software for front panel design.
>Of course, AutoCAD is available, but for my homebrew
>designs a bit pricey!!

>Does anyone have any suggestions regarding shareware
>or commercial programs that are not too costly?

>Vy 73,
>Don Allen W9CW

>--
Don,
I've used a fairly inexpensive Desktop Publishing program to layout
things like panels and also to do my own QSL cards!  It's called Arts
and Letters Express, and the graphics program that goes with it is
called Picture Perfect.  If you aren't doing any real serious drafting
work, there are several shareware drawing programs available.  If your
stuff is REAL simple, just use the graphics program that comes with
windows.
73,
Kerry Miller
[e-mail]




From [e-mail] Wed Dec 11 20:13:09 1996
Path: news1.epix.net!news3.epix.net!uunet!in2.uu.net!205.252.116.190!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.homebrew
Subject: Re: Wanted: CAD Software
Date: 4 Dec 1996 17:55:31 GMT
Organization: America Online, Inc. (1-800-827-6364) (1.14)
Lines: 36
Message-ID: <[e-mail]>
References: <582nrr$bp9$[e-mail]>
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X-Admin: [e-mail]
X-Newsreader: AOL Offline Reader

In article <582nrr$bp9$[e-mail]>, [e-mail] (Kerry
Miller) writes:

>
>>I am looking for PC software for front panel design.
>>Of course, AutoCAD is available, but for my homebrew
>>designs a bit pricey!!
>
>>Does anyone have any suggestions

Easytrax is a freeware PCBoard layout program that can
be made to do some drawing. You can export plotter files.

A shareware program called DraftChoice is available. It does not
however print nice looking text.

The best I have found for doing panels like I mention below is
Harvard Graphics 3.0 for DOS. Superb print quality.
You can export plotter files.

Use transparencies. Reverse the image so that it appears to
read backwards. Print it in color if possible and let dry.
Spray with 3M artists spray mount glue on the printed side.
Stick it to your panel. The print is on the inside and
can not be rubbed off. HP Premium transparencies work
better than others. This is also how I make PCBoard negatives minus the
glue of course..

Microsoft Office has all you need to get the job done also.
So does CorelDraw.

One bit of info about printing on transparencies is that Windows
allows you to use a black cartridge with transparencies using a Deskjet.
Thats something I can't do with HG3.

Carl


From [e-mail] Wed Dec 11 20:13:09 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!arclight.uoregon.edu!feed1.news.erols.com!howland.erols.net!newsfeed.internetmci.com!news.cyberhighway.net!not-for-mail
From: Dean Arthur <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Wanted: CAD Software
Date: Sun, 08 Dec 1996 00:57:55 -0700
Organization: CyberHighway Internet Services
Lines: 5
Message-ID: <[e-mail]>
References: <581uf6$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: ts1-25.fdm.cyberhighway.net
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.0Gold (Macintosh; I; 68K)

If you have Mac with 68030 or later, can let you have disks for Aura
Cad 2-D design. The original co. went out of business about two years
ago.




From [e-mail] Wed Dec 11 20:13:10 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!news-penn.gsl.net!news.gsl.net!news-peer.gsl.net!news.gsl.net!howland.erols.net!newsfeed.internetmci.com!compuserve.com!news.production.compuserve.com!news
From: Jay Craswell <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Wanted: CAD Software
Date: 9 Dec 1996 17:24:37 GMT
Organization: Dover Research Corp.
Lines: 19
Message-ID: <58hi0l$g42$[e-mail]>

I would comment that using "art" type software for schematics is only good if
you don't need to go to the PCB stage.  The great power of a CAD program is
that you can create a schematic that generates a netlist.  This lets you
verify each connection as you design the PCB.  Making it Science not art!
I can't tell you how crazy it makes me to manualy verify each connection
from a tape up vrs the schematic.  A program I deal with called Circad works
from start to finish.  Schematic to PCB and Gerber files and NC drill list.
Now adays you can send you Gerber files and NC drill info to places like
Alberta Printed Circuits and get double sided boards with plater through holes
for next to nothing.  I dumped all my etch tanks and stinky etching chemicals
long ago.  I've also got a special deal with Holophase (They make Circad)
for Hams.  I did some work on the Autorouter they include and my reward was
to have a version for my fellow hams at less than 1/3rd the cost.  Same softwa
re
(but from me) Support is only through my little company (Dover - 612-492-3913)
and updates are $50.  Cost of the program is $295 - Shipped.  EMail me if your
interested or check out the new WEB page www.holophase.com
73 and good luck on your projects!
--
73, Jay WB0VNE - AAV5TH


From [e-mail] Wed Dec 11 20:13:12 1996
Path: news1.epix.net!news3.epix.net!uunet!in3.uu.net!128.83.139.5!cs.utexas.edu!news.ti.com!news.dseg.ti.com!news
From: [e-mail] (Mustang Maniac)
Newsgroups: rec.radio.amateur.boatanchors,rec.radio.amateur.homebrew
Subject: WANTED: National XR-50 coil forms, B&W coils
Date: 10 Dec 1996 13:55:38 GMT
Lines: 17
Message-ID: <58jq4q$[e-mail]>
NNTP-Posting-Host: cna0952843.dseg.ti.com
Mime-Version: 1.0
Content-Type: Text/Plain; charset=US-ASCII
X-Newsreader: WinVN 0.99.7
Xref: news1.epix.net rec.radio.amateur.boatanchors:998 rec.radio.amateur.homebrew:21941

I'm looking for 3 or 4 National XR-50 coil forms, and two or more
unused B&W 3015 Miniductor coils for some transmitter projects.
Anyone have some of these they'd part with?

--
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, VE (ARRL/W5YI), avid QRPer and CW op
Ford Mustang enthusiast ('66 coupe, '69 GT-350, '72 conv, '95 GT conv)
Die-cast model car collector (Ford products only, in all scales)
Plastic model car builder (Ford products only, 1:24 and 1:25 scale)
Glass insulator collector (specializing in "oddball" pieces)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .



From [e-mail] Wed Dec 11 20:13:12 1996
Path: news1.epix.net!news3.epix.net!uunet!in2.uu.net!169.132.11.200!news.idt.net!newsfeed.internetmci.com!news.akorn.net!not-for-mail
From: [e-mail] (Dave Pascoe)
Newsgroups: rec.radio.swap,rec.radio.amateur.homebrew
Subject: WANTED: Vacuum variable caps
Date: 3 Dec 1996 16:38:09 GMT
Organization: Akorn Access, Inc.
Lines: 9
Message-ID: <581l1i$pu$[e-mail]>
NNTP-Posting-Host: paris.akorn.net
X-Newsreader: TIN [UNIX 1.3 950824BETA PL0]
Xref: news1.epix.net rec.radio.swap:97990 rec.radio.amateur.homebrew:21702

Wanted: Vacuum variable caps in the 800-2000 pF @ 5kV+ range

If you have one or more you'd consider parting with, please contact me:

73
--
Dave Pascoe
KM3T
[e-mail]


From [e-mail] Wed Dec 11 20:13:13 1996
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!bigboote.WPI.EDU!cam-news-feed2.bbnplanet.com!news.bbnplanet.com!cam-news-hub1.bbnplanet.com!howland.erols.net!newsfeed.internetmci.com!news.us.world.net!ns2.mainstreet.net!sloth.swcp.com!tesuque.cs.sandia.gov!SantaFe!usenet
From: [e-mail] (Jim Potter)
Newsgroups: rec.radio.swap,rec.radio.amateur.homebrew
Subject: Re: WANTED: Vacuum variable caps
Date: Wed, 04 Dec 1996 23:05:47 GMT
Organization: The Santa Fe Institute
Lines: 23
Message-ID: <[e-mail]>
References: <581l1i$pu$[e-mail]>
NNTP-Posting-Host: dial135.roadrunner.com
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[e-mail] (Dave Pascoe) wrote:

>Wanted: Vacuum variable caps in the 800-2000 pF @ 5kV+ range
>
>If you have one or more you'd consider parting with, please contact me:
>
>73
>--
>Dave Pascoe
>KM3T
>[e-mail]
You might want to try Surplus Sales of Nebraska in Omaha.  I don't
have their phone number handy, but they're a good outfit and have a
nice selection of vacuum variables of all sizes to choose from.

73 de K9GXC, Jim


James M. Potter, President              TEL: [phone]
JP Accelerator Works, Inc.              FAX: [phone]
2245 47th Street                        EMAIL: [e-mail]
Los Alamos, NM 87544-1604               URL: http://www.jpaw.com



From [e-mail] Wed Dec 11 20:13:14 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!phase2.worldnet.att.net!uunet!in2.uu.net!165.87.194.248!news-m01.ny.us.ibm.net!news-s01.ny.us.ibm.net!not-for-mail
From: peter smit <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: WANTED:, D2MAC CODER !!!
Date: Mon, 02 Dec 1996 07:43:42 +0800
Organization: hoogovens
Lines: 5
Message-ID: <[e-mail]>
Reply-To: [e-mail]
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Mime-Version: 1.0
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Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.0 (Win95; I)

I would like to buy a used d2mac coder (no decoder) for ATV
Please if you have any information contact me.

Peter Smit
PE1CQS


From [e-mail] Wed Dec 11 20:13:15 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!newsfeed.internetmci.com!in2.uu.net!208.202.14.37!news.icanect.net!usenet
From: [e-mail] (Terry Simonds)
Newsgroups: rec.radio.amateur.homebrew
Subject: Where Hi Voltage Zeners?
Date: Sun, 08 Dec 1996 17:02:52 GMT
Organization: Icanect
Lines: 8
Message-ID: <58esuq$[e-mail]>
NNTP-Posting-Host: 206.142.162.77
X-Newsreader: Forte Free Agent 1.0.82


I have a Heathkit scope (IO-104) that has managed to eat a string of
275V 3-mA Zeners. Anybody out there have a source for such a beast?

Thanks





From [e-mail] Wed Dec 11 20:13:16 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!worldnet.att.net!news.alt.net!newspost1.alt.net!usenet
From: "Peter Gottlieb" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Where Hi Voltage Zeners?
Date: 8 Dec 1996 20:49:25 GMT
Organization: Altopia Corp. - Affordable Usenet Access - http://www.alt.net
Lines: 16
Message-ID: <01bbe549$3eff1b60$9b0f2399@peter-s>
References: <58esuq$[e-mail]>
X-Newsreader: Microsoft Internet News 4.70.1155

Terry Simonds <[e-mail]> wrote in article
<58esuq$[e-mail]>...
>
> I have a Heathkit scope (IO-104) that has managed to eat a string of
> 275V 3-mA Zeners. Anybody out there have a source for such a beast?
>


If you can't find the 275 Volt ones, get lower voltage ones, but more of
them, so that the total
voltage of the string is the same.

Try Digi-key or Mouser (both have 800 numbers and will send you catalogs).

...Peter



From [e-mail] Wed Dec 11 20:13:17 1996
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!news-out.communique.net!demos!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.homebrew
Subject: Re: Where Hi Voltage Zeners?
Date: 10 Dec 1996 23:37:11 GMT
Lines: 18
Message-ID: <58ks77$1br0$[e-mail]>
References: <58esuq$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: slip129-37-205-228.in.us.ibm.net
X-Newsreader: IBM NewsReader/2 2.0

In <58esuq$[e-mail]>, [e-mail] (Terry Simonds) writes:
>
>I have a Heathkit scope (IO-104) that has managed to eat a string of
>275V 3-mA Zeners. Anybody out there have a source for such a beast?
>
>Thanks
>
>
> Hi Terry,

    Try a place called either Surplus Salvage or Surplus Supply a call. They a
re
 in Benton Harbor, Michigan. They have/had a lot of the old Heath parts. I
 don't have their number, but 1-616-555-1212 outta get you close. Good Luck

                                                      Jim W9LZ





From [e-mail] Wed Dec 11 20:13:17 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!ddsw1!news.mcs.net!van-bc!news.rmii.com!usenet
From: "Dennis L. Edinger" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: WTB:  Resistance Substitution Box
Date: Tue, 03 Dec 1996 16:38:02 -0800
Organization: Rocky Mountain Internet Inc.
Lines: 7
Message-ID: <[e-mail]>
NNTP-Posting-Host: 204.227.4.29
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.0 (Win16; I)

I also want a cap. sub box and an ind. sub box.  Old kit or homebrew
makes no difference.

E-mail me at [e-mail].  I am also good in the qrz
directory.

de Dennis/w0gd


From [e-mail] Wed Dec 11 20:13:19 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!news.ultranet.com!news-out.communique.net!uunet!in2.uu.net!128.83.139.5!cs.utexas.edu!news.ti.com!news.dseg.ti.com!news
From: [e-mail] (Mustang Maniac)
Newsgroups: rec.radio.swap,rec.radio.amateur.homebrew
Subject: Re: WTB: S meter
Date: 2 Dec 1996 18:42:53 GMT
Lines: 32
Message-ID: <57v7vd$[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: cna0952843.dseg.ti.com
Mime-Version: 1.0
Content-Type: Text/Plain; charset=US-ASCII
X-Newsreader: WinVN 0.99.7
Xref: news1.epix.net rec.radio.swap:97772 rec.radio.amateur.homebrew:21657

In article <[e-mail]>, [e-mail] says...
>
>I need an S meter for my homebrew rig. Does anyone
> have one they'd like to sell?
>


Phil, try using one out of an old CB radio.  They typically have 100
to 200 uA movements, and they work great in QRP and homebrew gear.  I
have used them many times (I always keep a bunch in my junk drawer).
Some are even lighted using small 12v grain-of-wheat light bulbs, and
you could use a small switch to enable/disable the light to save your
battery power.

I see old CB rigs for sale at flea markets for a buck or two apiece
all the time.  Doesn't matter if the rig works or not.  I've never yet
found a CB with a bad meter movement (except one that was sunk in salt
water when the boat it was installed on went down).


--
Dean W. Hemphill                      Email: [e-mail]
PO Box 328                            Home:  [phone]
Lake Dallas, Texas 75065-0328         Work:  [phone]
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Amateur radio operator KC5NG, Extra Class, VE (ARRL/W5YI), QRPer, CW op
Ford Mustang enthusiast ('66 coupe, '69 GT-350, '72 conv, '95 GT conv)
Die-cast model car collector (Ford products only, in all scales)
Plastic model car builder (Ford products only, 1:24 and 1:25 scale)
Glass insulator collector (specializing in "oddball" pieces)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .



From [e-mail] Wed Dec 11 20:13:20 1996
Newsgroups: rec.radio.swap,rec.radio.amateur.homebrew
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!swrinde!ihnp4.ucsd.edu!dog.ee.lbl.gov!newshub.nosc.mil!news!horowitz
From: [e-mail] (Alan M. Horowitz)
Subject: Re: WTB: S meter
Message-ID: <[e-mail]>
Sender: [e-mail]
Organization: NCCOSC RDT&E Division, San Diego, CA
References: <[e-mail]> <57v7vd$[e-mail]>
Date: Tue, 3 Dec 1996 22:10:02 GMT
Lines: 2
Xref: news1.epix.net rec.radio.swap:97972 rec.radio.amateur.homebrew:21698

S-meter readings?  Just guess using your trained ears, it's probably as
valid!


From [e-mail] Wed Dec 11 20:13:21 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!nntp.uio.no!solace!news.ifm.liu.se!news.lejonet.se!usenet
From: Lennart Nilsson <[e-mail]>
Newsgroups: rec.radio.swap,rec.radio.amateur.homebrew
Subject: Re: WTB: S meter
Date: Mon, 02 Dec 1996 08:19:28 -0800
Organization: Foreningen Lejonet, Linkoping, Sweden
Lines: 9
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: 194.68.149.12
Mime-Version: 1.0
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To: [e-mail]
Xref: news1.epix.net rec.radio.swap:98190 rec.radio.amateur.homebrew:21756

Phil Heaton wrote:
>
> I need an S meter for my homebrew rig. Does anyone
>  have one they'd like to sell?

Whatever you buy it won't give a true reading. Use any small meter and
mark the dial with the help of a calibrated signal generator connected to
the antenna input.
73 de Len SM5DFF


From [e-mail] Wed Dec 11 20:13:22 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.net!www.nntp.primenet.com!nntp.primenet.com!dciteleport.com!worldnet.att.net!uunet!in2.uu.net!199.242.23.5!nwlink.com!gekko
From: [e-mail] (Gordon Gekko)
Newsgroups: rec.radio.swap,rec.radio.amateur.homebrew
Subject: Re: WTB: S meter
Date: 5 Dec 1996 01:45:25 GMT
Organization: None
Lines: 13
Message-ID: <5859fl$[e-mail]>
References: <[e-mail]> <57v7vd$[e-mail]> <[e-mail]>
NNTP-Posting-Host: ip050.tu1.nwlink.com
X-Newsreader: News Xpress Version 1.0 Beta #4
Xref: news1.epix.net rec.radio.swap:98214 rec.radio.amateur.homebrew:21761

In article <[e-mail]>,
   [e-mail] (Alan M. Horowitz) wrote:
>S-meter readings?  Just guess using your trained ears, it's probably as
>valid!


But it doesn't look as cool!

Seriously, I don't think I have ever seen an accurate one.  Mine always
says he's S9 and his always says I'm S2!  Go figure.


Gordon


From [e-mail] Wed Dec 11 20:13:23 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!news-dc.gsl.net!news.gsl.net!hookup!visi.com!mr.net!www.nntp.primenet.com!nntp.primenet.com!mindspring!newspump.sol.net!howland.erols.net!news-e2a.gnn.com!pop.gnn.com!N6TT
From: [e-mail] ()
Newsgroups: rec.radio.amateur.homebrew
Subject: WTB:US TOWER HDX589
Date: Wed, 11 Dec 1996 09:44:07
Organization: GNN
Lines: 4
Message-ID: <58ms24$[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 17:46:44 GMT
X-Mailer: GNNmessenger 1.3

     WANTED US TOWER HDX589,SKY NEEDLE,ETC
     [e-mail] STEVE 310-3186990
                  MANHATTAN BEACH,CA.



From [e-mail] Wed Dec 11 20:13:24 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-10.sprintlink.net!news.accessone.com!news
From: [e-mail] (Ed Mitchell)
Newsgroups: rec.radio.amateur.misc,rec.radio.amateur.digital.misc,rec.radio.amateur.policy,rec.radio.amateur.homebrew,rec.radio.scanner,rec.radio.shortwave,aus.radio.amateur.misc,aus.radio.amateur.digital
Subject: www.hamradio-online.com: most popular ham web site?
Date: 9 Dec 1996 04:47:04 GMT
Organization: Virtual Publishing Co.
Lines: 30
Message-ID: <58g5k8$[e-mail]>
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From [e-mail] Sat Dec 21 13:24:24 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: !    MASS POST  Was Here                                                 ...
Date: 15 Dec 1996 04:01:02 GMT
Organization: AOL http://www.aol.com
Lines: 20
Message-ID: <[e-mail]>
References: <58uq78$[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]
X-Newsreader: AOL Offline Reader

In article <58uq78$[e-mail]>, [e-mail]
writes:

>Subject:       !    MASS POST  Was Here
>
>From:  [e-mail]
>Date:  Sat, 14 Dec 96 18:04:21 GMT
>
>MASS POST, by Ones And Zeros, will let you post to as many newsgroups as
you
>want!
>
>To find out more about this exciting new program, visit a business
newsgroup.
>
>(This ad was sent to thousands of newsgroups!)
>
>

Here is someone who should be hung in a public square.


From [e-mail] Sat Dec 21 13:24:25 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!news.kei.com!newsfeed.internetmci.com!mr.net!news.sgi.com!csulb.edu!drivel.ics.uci.edu!news.service.uci.edu!ihnp4.ucsd.edu!news1.ucsd.edu!news-mail-gateway
From: [e-mail] (Curtis, Charles)
Newsgroups: rec.radio.amateur.homebrew
Subject: (none)
Date: 19 Dec 96 14:10:00 GMT
Organization: ucsd usenet gateway
Lines: 30
Message-ID: <[e-mail]>
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]


John,

My MECA catalog does not list part number 700-MO42.  The closest
to your description is  700-MO31 which is specified at
800-900 Mhz, 1500 Watts avg and 25 dB min directivity.  Try calling
them at:

MECA Electronics, Inc.
William Davo, Sales Manager
[phone]
Denville, NJ 07834
______________________________________________________
Date: Mon, 16 Dec 1996 06:33:33 GMT
From: [e-mail] (Occolowitz John)
Subject: Specs. on MECA bidirectional coupler 700-M042?

I have a MECA bidirectional coupler marked:

KS-21603 L21
COMCODE: 406715219
Coupler
700-M042

It has a -40dB and a -50dB port.

Does anybody know the specs. for this coupler (frequency range,
average allowable power, directivity)?

Thanks. John KB9MIE.


From [e-mail] Sat Dec 21 13:24:26 1996
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!zombie.ncsc.mil!newsgate.duke.edu!agate!howland.erols.net!www.nntp.primenet.com!nntp.primenet.com!feed1.news.erols.com!worldnet.att.net!uunet!in2.uu.net!192.220.251.22!netnews.nwnet.net!wrq.com!usenet
From: [e-mail] (Paul H. Dunn)
Newsgroups: rec.radio.amateur.homebrew
Subject: 1.5Ghz Antenna PreAmp
Date: 9 Dec 1996 19:39:26 GMT
Organization: WRQ
Lines: 14
Message-ID: <58hpte$[e-mail]>
NNTP-Posting-Host: 150.215.70.101
Mime-Version: 1.0
Content-Type: Text/Plain; charset=US-ASCII
X-Newsreader: WinVN 0.99.6

I've built a "Patch" antenna for the 1545 Mhz GPS band, and so far it
seems to increase the received signal strength a bit, but not to my liking.

Authors of a couple articles on the topic have referenced a "MARS6" op-amp
that they've used in this application with some success.  I've not been
able to cross reference it or find anything close in the catalogs and data
books I have.

Anyone out there who can aim me in the right direction?

Paul Dunn
WRQ Reflection Software
[e-mail]



From [e-mail] Sat Dec 21 13:24:27 1996
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From: [e-mail] (CommQuart)
Newsgroups: rec.radio.amateur.homebrew
Subject: 1000 early tubes SOLD!!!
Date: 12 Dec 1996 20:20:06 GMT
Organization: AOL http://www.aol.com
Lines: 5
Message-ID: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

Please, no more calls or email, the 1000 early radios tubes
have a new home!
Thank you to all who wrote or called!

Peter


From [e-mail] Sat Dec 21 13:24:27 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!152.163.170.17!newstf01.news.aol.com!audrey01.news.aol.com!not-for-mail
From: [e-mail] (CommQuart)
Newsgroups: rec.radio.amateur.homebrew
Subject: 1000 old radio tubes
Date: 12 Dec 1996 06:00:02 GMT
Organization: AOL http://www.aol.com
Lines: 16
Message-ID: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

I have five large boxes full of vintage radio tubes (mostly pre 1950s for
sale.  There are at least 1300 or 1400 tubes in this lot -- I don't have
the time to count or sort so I am guaranteeing 1000 tubes!!
tubes are mostly boxed -- maybe some loose ones due to boxes falling
apart from age.  Some tubes maybe used or retests. There are no
modern TV tubes or compactron garbage in this lot!

I am asking a firm 300 dollars.  I prefer to have the buyer  pickup
so the tubes can be examined before purchase.  I will ship -- but
only on an "as-is basis,"  you buy'em, you own them.  Please note
there are no 45s or 50s included!  Treasure hunters take note! They
were never there, or are long gone!

I live in northcentral Connecticut, town of Somers.  Near I-91

call 860 749-7186 for info, ask for Peter, or email me.


From [e-mail] Sat Dec 21 13:24:29 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!news.enteract.com!news.he.net!news.dra.com!xara.net!emerald.xara.net!news.ftech.net!news
From: Niels Montanana <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: 28Mhz to 144Mhz Transverter using M55727 Mitsubishi RF Power Module
Date: 13 Dec 1996 17:52:42 GMT
Organization: Legal & Commercial Publishing
Lines: 24
Message-ID: <58s55a$[e-mail]>
References: <58go6t$[e-mail]> <E2Br76.KLp@pe1chl>
NNTP-Posting-Host: max096.frontier-networks.co.uk
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 1.22 (Windows; I; 32bit)

I put the PA stage together using the M55727 module and
everything works great.

I have a small pcb, 100mm * 25mm, parallel to the module and
bolted to the heatsink on a couple of spacers so that the
module pins lie flat on the PCB.

I put ferrite beads on all the power leads + decoupling caps
and feed the bias in via a 7809 regulator.

The PA stage forms the 'final' of my homebrew 28Mhz to 144Mhz
transverter which makes a lot use of MMIC's and Toko helicals
with an MGF1302 RX front-end.

Power output is variable from 0 to 20W with 28Mhz drive from a
Yaesu FT100MP.

If anyone would like circuit details please send requests via
eMail to [e-mail]

Niels Montanana
G8RWG




From [e-mail] Sat Dec 21 13:24:29 1996
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From: [e-mail] (John Noker)
Newsgroups: rec.radio.amateur.homebrew
Subject: 2M amp plans wanted
Date: 13 Dec 1996 06:28:25 GMT
Organization: Prodigy Services Company  1-800-PRODIGY
Lines: 3
Distribution: world
Message-ID: <58qt29$[e-mail]>
NNTP-Posting-Host: innugap5-int.news.prodigy.com
X-Newsreader: Version 1.2

If you know of any easy to build (or cheap) 2 meter amplifire plans could
you pass them on to me?  Thanks. clint [e-mail]



From [e-mail] Sat Dec 21 13:24:31 1996
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From: Jim Devenport <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: 2m antenna tuner
Date: Thu, 12 Dec 1996 14:40:57 -0700
Organization: Los Alamos National Laboratory
Lines: 29
Message-ID: <[e-mail]>
References: <[e-mail]>
Reply-To: [e-mail]
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Mime-Version: 1.0
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To: Michael Pinneo <[e-mail]>

Michael Pinneo wrote:
>
> Can anyone recommend a construction article for an antenna tuner/matching
> network
> for use at 144 MHz, 1kw cw?  Thanks.
>
> Michael

Heh, as you see the usual ham reaction to this is "HORRORS!"  There is a
circuit for a 2 meter transmatch circuit in the old ARRL VHF Manual.
I built one years ago (it will only handle 100 Watts or so max) and
found it quite useful for coupling power to all sorts of things:
*Horizontal and Vertical Beams tied together with T fitting
 (very useful for VHF nets where horiz. polarization is used by some
  checkins and vertical by others)
*TV and other off frequency VHF antennas
*Long wires, HF beams and other non-VHF antennas
And, yes, none of these work as well as a resonant antenna and matched
feed system without additional matching circuitry on the wrong (radio)
end of the coax.  They do provide experimentation and some utility
though.

--
|-------------------------------------------------------|
|Jim Devenport    WB5AOX                                |
|All Standard Disclaimers Disclaimed                    |
|My views rarely (if ever) reflect those of my employers|
|http://nis-www.lanl.gov/~jdport/                       |
|-------------------------------------------------------|


From [e-mail] Sat Dec 21 13:24:33 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!dispatch.news.demon.net!demon!mail2news.demon.co.uk!lfheller.demon.co.uk!Leon
From: [e-mail] (Leon Heller)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: 2m antenna tuner
Date: Fri, 13 Dec 96 19:37:18 GMT
Organization: Home
Lines: 33
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
Reply-To: [e-mail]
X-Mail2News-User: [e-mail]
X-Mail2News-Path: lfheller.demon.co.uk
X-Newsreader: Demon Internet Simple News v1.29

In article <[e-mail]> [e-mail] "Jim Devenport" writes:

> Michael Pinneo wrote:
> >
> > Can anyone recommend a construction article for an antenna tuner/matching
> > network
> > for use at 144 MHz, 1kw cw?  Thanks.
> >
> > Michael
>
> Heh, as you see the usual ham reaction to this is "HORRORS!"  There is a
> circuit for a 2 meter transmatch circuit in the old ARRL VHF Manual.
> I built one years ago (it will only handle 100 Watts or so max) and
> found it quite useful for coupling power to all sorts of things:
> *Horizontal and Vertical Beams tied together with T fitting
>  (very useful for VHF nets where horiz. polarization is used by some
>   checkins and vertical by others)
> *TV and other off frequency VHF antennas
> *Long wires, HF beams and other non-VHF antennas
> And, yes, none of these work as well as a resonant antenna and matched
> feed system without additional matching circuitry on the wrong (radio)
> end of the coax.  They do provide experimentation and some utility
> though.

I remember reading a review of a VHF matching unit in Radcom a few years
ago, which successfully matched the Tx to a steel dustbin. 8-)

Leon
--
Leon Heller, G1HSM                | "Do not adjust your mind, there is
E-mail [e-mail]  |  a fault in reality": on a wall
Phone: [phone]         |  many years ago in Oxford.



From [e-mail] Sat Dec 21 13:24:34 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!visi.com!uunet!in1.uu.net!128.138.240.25!boulder!spot.Colorado.EDU!tiemann
From: [e-mail] (TIEMANN BRUCE)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: 2m antenna tuner
Date: 14 Dec 1996 01:54:15 GMT
Organization: University of Colorado, Boulder
Lines: 12
Message-ID: <58t1c7$[e-mail]>
References: <[e-mail]> <[e-mail]> <[e-mail]>
NNTP-Posting-Host: spot.colorado.edu
NNTP-Posting-User: tiemann

In article <[e-mail]>,
Leon Heller <[e-mail]> wrote:
>
>I remember reading a review of a VHF matching unit in Radcom a few years
>ago, which successfully matched the Tx to a steel dustbin. 8-)

... I always find a perfect match when feeding my VHF/UHF antennas with a
few hundred feet of RG-58, or better, RG-174.  They won't take 1 kW
though; so how about a mile of RG-8?  Perfect 1:1 SWR every time...

Bruce
N6URH


From [e-mail] Sat Dec 21 13:24:35 1996
Newsgroups: rec.radio.amateur.homebrew
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!news.bbnplanet.com!su-news-hub1.bbnplanet.com!arclight.uoregon.edu!news.sprintlink.net!news-peer.sprintlink.net!metro.atlanta.com!news.radio.org!wa4mei!ke4zv!gary
From: [e-mail] (Gary Coffman)
Subject: Re: 2m antenna tuner
Message-ID: <[e-mail]>
Reply-To: [e-mail] (Gary Coffman)
Organization: Destructive Testing Systems
References: <[e-mail]>
Date: Sat, 14 Dec 1996 15:58:40 GMT
Lines: 30

In article <[e-mail]> [e-mail] (Michae
l Pinneo) writes:
>Can anyone recommend a construction article for an antenna tuner/matching
>network
>for use at 144 MHz, 1kw cw?  Thanks.

At that power level and frequency, I'd go with a double stub
tuner made from 3 1/8th inch rigid line. It's a little big,
but the Q is high and it'll handle the power. In theory at
least, if not in practice, a double stub tuner can match any
impedance to any impedance. In practice things get hinky if
you go to extreme values.

The two stubs are easy to fabricate, and if they must be
adjustable, you can do it mechanically like a notch cavity.
In fact you could just use a couple of notch cavities for the
stubs if their adjustment range is sufficient. The center
trombone section is a little tricky to fabricate. You have
to use copper tubing sizes that will nest inside each other
for a slip fit for both the outer and inner conductors. A bit
of finger stock soldered around the ends of the larger tubes
will give good contact. But if the span of adjustment you need
is small, you can use a single rigid piece of approximately
the correct length and make up the difference in the stubs.

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 13:24:36 1996
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From: Mike Willis <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: 2m antenna tuner
Date: Mon, 16 Dec 1996 08:50:58 +0000
Organization: Rutherford Appleton Laboratory, Oxon, UK
Lines: 41
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
NNTP-Posting-Host: bradman.te.rl.ac.uk
Mime-Version: 1.0
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Ian White, G3SEK wrote:
>
> Michael Pinneo wrote:
> >Can anyone recommend a construction article for an antenna tuner/matching
> >network
> >for use at 144 MHz, 1kw cw?  Thanks.
>
> In one word, DON'T.
>
> In a few more words: match the impedance correctly at the antenna itself
> and operate the feedline at low VSWR to reduce losses. If your antenna
> is not matched correctly, it would be bad engineering to build an ATU to
> hide the problem - fix the antenna.

Quite correct, match the antenna if possible.

It rather depends on if you need a matching unit or a tuning unit and
what it is for. E.g resonating a mobile whip (not with 1kW). turning a
1.5:1 VSWR to a 1:1 VSWR to protect some poor power transistors, for
example when operating a high Q 144 MHz antenna at 147 MHz. Matching
an open wire feed system to 50 ohms, or even tuning up the HF wire
dipole that is all you can put up owing to antenna restrictions.

ATUs, or more corectly AMUs are used frequently on VHF. My 4m antenna
has a built in ATU - called a Gamma Match. My valve amplifier also has a
device to tune the 3k ohm output to the 50ohm coax. Our box of 4 yagis
(co-ax fed for portable use Ian) has a 1/4 wave line matching unit to
transform 12.5 ohms to 50 ohms.

Therefore, to answer the question. Assuming you are trying to match a 50
ohm line to a near resonant antenna, you can use a pi or pi-L network
just like an HF atu, except the inductor will just be a length of thick
copper - length cut to suit. The capacitors will be low loss air spaced
flappers - like used in valve amplifiers. Calculate the value of L and C
required, cut L to length and make the Cs adjustable. REsonate and
match. Place as close to antenna as possible.

At higher frequencies you can use a stub tuner, but these are a bit big
on 144 MHz.

It is more a matter of where you put the ATU than if you use one.


From [e-mail] Sat Dec 21 13:24:38 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!news.kei.com!newsfeed.internetmci.com!tezcat!netaxs.com!feed1.news.erols.com!news.ecn.uoknor.edu!munnari.OZ.AU!news.mel.connect.com.au!news.mel.aone.net.au!cheese.pcug.org.au!supreme!parkerp
From: Peter Parker <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: 2m antenna tuner
Date: Thu, 19 Dec 1996 06:52:32 +1100
Organization: Customer of Access One Pty Ltd, Melbourne, Australia
Lines: 23
Message-ID: <Pine.SOL.3.91.961219065013.10115A-100000@supreme>
References: <[e-mail]> <[e-mail]> <[e-mail]> <58t1c7$[e-mail]>
NNTP-Posting-Host: cheese.pcug.org.au
Mime-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
X-Sender: parkerp@supreme
In-Reply-To: <58t1c7$[e-mail]>



On 14 Dec 1996, TIEMANN BRUCE wrote:

> In article <[e-mail]>,
> Leon Heller <[e-mail]> wrote:
> >
> >I remember reading a review of a VHF matching unit in Radcom a few years
> >ago, which successfully matched the Tx to a steel dustbin. 8-)
>
> ... I always find a perfect match when feeding my VHF/UHF antennas with a
> few hundred feet of RG-58, or better, RG-174.  They won't take 1 kW
> though; so how about a mile of RG-8?  Perfect 1:1 SWR every time...
>
> Bruce
> N6URH
>
>

1:1 maybe, but not much RF out the other end. Better to use much less
cable and properly match at the antenna.

73, Peter VK1PK


From [e-mail] Sat Dec 21 13:24:39 1996
Path: news1.epix.net!news3.epix.net!uunet!in1.uu.net!199.94.215.18!news.bbnplanet.com!cam-news-hub1.bbnplanet.com!howland.erols.net!usc!news.service.uci.edu!ihnp4.ucsd.edu!news1.ucsd.edu!news-mail-gateway
From: [e-mail] (laura halliday)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: 2m FM project for Theater
Date: 20 Dec 96 17:56:46 GMT
Organization: ucsd usenet gateway
Lines: 51
Message-ID: <[e-mail]>
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]

[e-mail] (Michael W. Malone) wrote:

> Being new to ham radio, and having a problem that could be
> solved with ham radio, I thought I'd ask some help for a
> little project.

> For a play I am directing, I need to turn on a switch remotely.
> (BTW, the play is being performed by my Youth Drama Team at my
> church.) I thought that it might be possible, and simple, to
> create a reciever that would throw a relay after receiving a
> code from the tone pad on my handheld...

Sure. Look in back issues of 73 for the Intelligent Relay, a little
doodad that plugs into a receiver, listens to DTMF tones and
controls things for you. It uses a DTMF decoder and a Parallax
Basic Stamp, so you can program more-or-less any access code you
want for multiple functions. I don't have the issue details
handy, but poking around Parallax's web site (www.parallaxinc.com)
might provide a pointer.

> What I was thinking was a simple little receiver that received
> on a set frequency. I could then dial in that frequency on
> my handheld and send the correct tones to the receiver.

Yes. For what you want, maybe one of Ramsey's VHF FM receiver
kits would get the job done? Or creatively retune an FM broadcast
receiver? Cheapie portables are cheap enough to blow up if you goof.

> (snip...)
> Once I get this figured out, I thought that perhaps that
> more switch could be added using different "codes."

This is where the Intelligent Relay shines, because you can
add more codes and functions by reprogramming it.

> Anyway, this may be too complicated for my first project.
> I've got a fairly long timeline, about two months, so any
> help would be appreciated.

Too complicated? No. Take it a step at a time. Obtain, build
(or modify) and test the receiver. FTP the Basic Stamp
documentation and programs and order a Stamp - either a pukka
one from Parallax, or one of the many clones. Program it.
Control things with it.

Above all, have fun...

Laura Hallidau VE7LDH         "C'est une femme mutine, assez
[e-mail]             elegante, grave et legere, ayant le
[e-mail]               sens du confort et du plaisir
Locator: CN89mg                en tout." - C. Deneuve


From [e-mail] Sat Dec 21 13:24:41 1996
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.iarc.com!econ4.econnect.net!news.islandnet.com!news.jsums.edu!hammer.uoregon.edu!arclight.uoregon.edu!mr.net!www.nntp.primenet.com!nntp.primenet.com!news.bbnplanet.com!su-news-hub1.bbnplanet.com!newsfeed.internetmci.com!news.ro.com!btbmag
From: [e-mail] (Michael W. Malone)
Newsgroups: rec.radio.amateur.homebrew
Subject: 2m FM project for Theater
Date: Thu, 19 Dec 1996 15:03:33 -0600
Organization: Business To Business Magazine
Lines: 36
Message-ID: <[e-mail]>
NNTP-Posting-Host: ts1p7.ro.com
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 8bit
X-Newsreader: Yet Another NewsWatcher 2.2.0


Being new to ham radio, and having a problem that could be solved with ham
radio, I thought I'd ask some help for a litte project.

For a play I am directing, I need to turn on a switch remotely.  (BTW, the
play is being performed by my Youth Drama Team at my church.)  I thought
that it might be possible, and simple, to create a reciever that would
throw a relay after receiving a code from the tone pad on my handheld.

What I was thinking was a simple little reciever that received on a set
frequency.  I could then dail in that frequency on my handheld and send
the correct tones to the reciever.

Recently I saw a similar plan that used the subaudible tones to turn on
two devices.  In the example I saw, it was used to turn on a speaker.
While I like the idea, and perhaps I should use the subaudible tones as a
"safty," I don't want this to be tripped by any FM signal that has those
tones.  I want to be able to "type in" a tone to activate the switch.

Once I get this figured out, I thought that perhaps that more switch could
be added using different "codes."

Anyway, this may be to complicated for my first project.  I've got a
fairly long timeline, about two months, so any help would be appreciated.


Please feel free to email me or respond here.

Thanks,
Michael Malone
KF4MYX

_________________
http://ro.com/~btbmag
http://ro.com/~btbmag/ufo/photo.html
These opinions can float large blimps.


From [e-mail] Sat Dec 21 13:24:42 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!uunet!in1.uu.net!160.45.4.4!fu-berlin.de!unlisys!not-for-mail
From: Gerhard Hoffmann <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: 600 MHz Divider needed
Date: Thu, 19 Dec 1996 18:54:20 -0800
Organization: Unlimited Surprise Systems, Berlin
Lines: 10
Message-ID: <[e-mail]>
References: <59bk3n$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: pppx77.berlin.snafu.de
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.01 (Win16; I)

M Simon wrote:

> I need a divide by 16 integrated circuit that can count
> up to 600 MHz with all the Q's brought out

I used a Motorola   MC 100 E 016 FM. It works until 750 MHz or so.
It's even presettable, but gets really hot.

--
Gerhard Hoffmann        dk4xp


From [e-mail] Sat Dec 21 13:24:43 1996
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!newsfeed.internetmci.com!CTCnet!info.ucla.edu!news.ucdavis.edu!indigo!mays
From: mays@indigo (Skip May)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: 600 MHz Divider needed
Date: 19 Dec 1996 23:32:37 GMT
Organization: University of California, Davis
Lines: 21
Message-ID: <59cjal$[e-mail]>
References: <59bk3n$[e-mail]>
NNTP-Posting-Host: indigo.ucdavis.edu
X-Newsreader: TIN [version 1.2 PL2]

If you can find it still, I like the "Plessy 11C90 or equiv" as it was an
industry standard in the 70's and 80's.
Contact Ramsey Electronics, (ads everywhere) about their prescaler kit also.
Good luck.
skip may
[e-mail]

M Simon ([e-mail]) wrote:

: I need a divide by 16 integrated circuit that can count
: up to 600 MHz with all the Q's brought out

: I am using it for a direct reading frequency counter.

: Simon
: In the end people get the government they deserve.

: Read "The Weapon Shops of Isher" by A.E. vanVogt

: Simon



From [e-mail] Sat Dec 21 13:24:43 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!news.kei.com!newsfeed.internetmci.com!howland.erols.net!news.sprintlink.net!news-peer.sprintlink.net!news.sprintlink.net!news-pull.sprintlink.net!news.sprintlink.net!news-dc-10.sprintlink.net!news.callamer.com!oso.slonet.org!cbuttsch
From: Clifford Buttschardt <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: 600 MHz Divider needed
Date: Thu, 19 Dec 1996 17:13:52 -0800
Organization: Call America Internet Services  [phone]
Lines: 17
Message-ID: <[e-mail]>
References: <59bk3n$[e-mail]> <[e-mail]>
NNTP-Posting-Host: oso.slonet.org
Mime-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
To: Gerhard Hoffmann <[e-mail]>
In-Reply-To: <[e-mail]>

They ALL get hot!  Cliff K7RR

On Thu, 19 Dec 1996, Gerhard Hoffmann wrote:

> M Simon wrote:
>
> > I need a divide by 16 integrated circuit that can count
> > up to 600 MHz with all the Q's brought out
>
> I used a Motorola   MC 100 E 016 FM. It works until 750 MHz or so.
> It's even presettable, but gets really hot.
>
> --
> Gerhard Hoffmann      dk4xp
>
>



From [e-mail] Sat Dec 21 13:24:45 1996
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!newsfeed.internetmci.com!news.wwa.com!news
From: [e-mail] (M Simon)
Newsgroups: rec.radio.amateur.homebrew
Subject: 600 MHz Divider needed
Date: Thu, 19 Dec 1996 14:39:47 GMT
Organization: Space-Time Productions
Lines: 13
Message-ID: <59bk3n$[e-mail]>
NNTP-Posting-Host: 206.230.95.11
X-Newsreader: Forte Free Agent 1.0.82


I need a divide by 16 integrated circuit that can count
up to 600 MHz with all the Q's brought out

I am using it for a direct reading frequency counter.

Simon
In the end people get the government they deserve.

Read "The Weapon Shops of Isher" by A.E. vanVogt

Simon



From [e-mail] Sat Dec 21 13:24:46 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.net!www.nntp.primenet.com!nntp.primenet.com!mr.net!news-out.microserve.net!news-in.microserve.net!not-for-mail
From: [e-mail] (tyler)
Newsgroups: rec.radio.amateur.homebrew
Subject: 6m inverted V - Horiz or Vert?
Date: 18 Dec 1996 00:13:46 GMT
Organization: Your Organization
Lines: 9
Distribution: world
Message-ID: <597cvq$krr$[e-mail]>
NNTP-Posting-Host: sl105.cyberia.com
Mime-Version: 1.0
Content-Type: Text/Plain; charset=US-ASCII
X-Newsreader: WinVN 0.99.7

I hate to sound like a complete moron, but isn't an inverted V antenna
horizontally polarized?  I'm thinking of getting Ten Tec's 2m to 6m
transverter but don't have any room to put up an antenna.  I already have an
inverted V in the attic.  My only 2m rig is my HT.  (FM of course)  Horizontal

polarization won't do me much good on FM.  Is that right?  Is an inverted V
horizontally polarized?  Thanks for any help.
73s de N3SPD
Tyler



From [e-mail] Sat Dec 21 13:24:47 1996
Path: news1.epix.net!news3.epix.net!uunet!in3.uu.net!194.179.1.100!minerva.ibernet.es!diana.ibernet.es!not-for-mail
From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: AEA2232 help needed-SOS
Date: Fri, 20 Dec 1996 19:10:56 GMT
Organization: Unisource Espana NEWS SERVER
Lines: 29
Message-ID: <59eo9f$hfu$[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: info160.jet.es
X-Newsreader: Forte Free Agent 1.0.82

Dear friends,

My AEA DSP 2232 doesn┤t   work right.
I┤m getting on the LCD of the TNC the following,
Packet
Packet
and both lights DCD and CMD are on.

On the screen of the computer appears the following message when i
communicate with the TNC,

cmd: 3d: DSP failed load software and sometimes cmd: 2d: DSP failed
load software.

I dont know if the Microchip Motorola 56001zl20 is doing wrong or some
statics on it or other.
How can I solve this problem..
AEA they say is in processof closing, so they can not help me.
Please some one do it.
Awaiting your kind comments, have my best.
E-mail me [e-mail]
Christian-Pedro EA2AFI
------------------------------------------------------------------------------
----
Christian M. Hondeville Urrutibeheity

Particular de club 2                                  Phone:  [phone]
Las Arenas-48930                                      Fax:    [phone]
Spain-Espa±a                                          E-mail: [e-mail]



From [e-mail] Sat Dec 21 13:24:48 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!news.cmc.net!usenet
From: [e-mail] (Gary Fiber)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: AEA2232 help needed-SOS
Date: Sat, 21 Dec 1996 16:33:37 GMT
Organization: Chambers Multimedia Connection
Lines: 37
Message-ID: <59h3nd$[e-mail]>
References: <[e-mail]> <59eo9f$hfu$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: pm2-5.edmonds.cmc.net
X-Newsreader: Forte Free Agent 1.0.82

[e-mail] wrote:

>Dear friends,

>My AEA DSP 2232 doesn┤t   work right.
>I┤m getting on the LCD of the TNC the following,
>Packet
>Packet
>and both lights DCD and CMD are on.

>On the screen of the computer appears the following message when i
>communicate with the TNC,

>cmd: 3d: DSP failed load software and sometimes cmd: 2d: DSP failed
>load software.

>I dont know if the Microchip Motorola 56001zl20 is doing wrong or some
>statics on it or other.
>How can I solve this problem..
>AEA they say is in processof closing, so they can not help me.
>Please some one do it.
>Awaiting your kind comments, have my best.
>E-mail me [e-mail]
>Christian-Pedro EA2AFI
>-----------------------------------------------------------------------------
-----
>Christian M. Hondeville Urrutibeheity

>Particular de club 2                                  Phone:  [phone]
>Las Arenas-48930                                      Fax:    [phone]
>Spain-Espa±a                                          E-mail: [e-mail]


Try pressing down on the DSP chip.  many times the chip will become loose in
the socket due to the heating and cooling of the DSP-2232.  Also the DSP chip
could be in trouble.

Gary



From [e-mail] Sat Dec 21 13:24:49 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.net!news.idt.net!cam-news-hub1.bbnplanet.com!news.bbnplanet.com!cpk-news-hub1.bbnplanet.com!portc02.blue.aol.com!audrey01.news.aol.com!not-for-mail
From: [e-mail] (JohnsonHE)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Anybody Know of a HomePage for Avontek ?
Date: 14 Dec 1996 16:16:37 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]

Yes, it's http://www.avAntec.com

And you thought your english teacher was nuts when she tried to teach you
spelling!

The homepage is in German, and there's a note at the bottom of the page
that says an English version will be available real soon now.

W4ZCB


From [e-mail] Sat Dec 21 13:24:50 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: woody white <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Anybody Know of a HomePage for Avontek ?
Date: Sat, 14 Dec 1996 22:16:25 -0800
Organization: http://www.geocities.com/capecanaveral/3722
Lines: 25
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
NNTP-Posting-Host: 207.146.142.9
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 2.01E (Win16; I)

If the original poster (this thread goes back a while) was looking for
Avantek, manufacturer of MMICs and FETs, they were located in
Santa Clara, CA and purchased by HP not too long ago.  I think their
parts are carried by Penstock.  Woody


JohnsonHE wrote:

> Yes, it's http://www.avAntec.com
>
> And you thought your english teacher was nuts when she tried to teach you
> spelling!
>
> The homepage is in German, and there's a note at the bottom of the page
> that says an English version will be available real soon now.
>
> W4ZCB

--
de  Woody (WB4QXE) -  [e-mail]
Electron Microscopist/Microanalysist,
Ham radio "homebrewer", shade tree mechanic,
'90 Nissan 240SX, wish still had my Mcycle too!
http://www.geocities.com/capecanaveral/3722
.


From [e-mail] Sat Dec 21 13:24:51 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] (TUBEBUYER)
Newsgroups: rec.radio.amateur.homebrew
Subject: BA's for Sale
Date: 19 Dec 1996 13:30:09 GMT
Organization: AOL http://www.aol.com
Lines: 8
Message-ID: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

SX-25
SP-400 with original power supply and manual
Command Xmitter
CE Signal Slicer,  458 VFO and Exciter
S-20R (extra nice)
Globe Xmiter
Craftsman RC-10 tube FM tuner
Heathkit SP-2 tube stereo preamp


From [e-mail] Sat Dec 21 13:24:53 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!swrinde!sdd.hp.com!hp-pcd!hpcvsnz.cv.hp.com!tomb
From: [e-mail] (Tom Bruhns)
Newsgroups: rec.video.cable-tv,rec.radio.amateur.homebrew
Subject: Re: Cable noise???
Followup-To: rec.video.cable-tv,rec.radio.amateur.homebrew
Date: 12 Dec 1996 00:24:14 GMT
Organization: Hewlett Packard Corvallis Site
Lines: 30
Message-ID: <58njbe$[e-mail]>
References: <58ka1r$[e-mail]>
NNTP-Posting-Host: hplsnb.lsid.hp.com
X-Newsreader: TIN [version 1.1 PL9.4]
Xref: news1.epix.net rec.video.cable-tv:28653 rec.radio.amateur.homebrew:21970

Stephen Muther ([e-mail]) wrote:

: The best O-scopes to use for video waveforms tend to be the Asian
: imports like Hitachi, Anritsu and some of the others that appear
: under domestic brand names like Sencore, B&K etc.  What you will
: notice about these is that they have video mode triggering
: built in.  These trigger modes are usually marked TV-H or TV-V
: for horizontal or vertical interval triggering.  These units
: appear to be designed with TV service in mind and are very good
: even with a lot of noise on the waveform.  The drawback is that
: these scopes are not the fastest in the world and don't compare
: well to the better Tek scopes for high frequency measurement.

Gee, what's wrong with a Tek scope??  Mine (a T932) has TV triggering
modes.  And my HP54542A at work also has TV triggering modes (selectable
among NTSC and PAL and user defined rates).

: If you have a scope that does not have TV mode triggering, you
: can build your own using an LM1881 (see National's web page).

Good advice.  You can even add a counter to the LM1881 (or LM1882--
more modern.  I think National is discouraging use of the LM1881 now.)
which counts H-sync and is reset by V-sync, to trigger on a particular
line in each field (or even each frame).  Not a bad accessory to have
for your scope if you do much video work.

--
Cheers,
Tom
[e-mail]


From [e-mail] Sat Dec 21 13:24:54 1996
Newsgroups: rec.video.cable-tv,rec.radio.amateur.homebrew
Path: news1.epix.net!news3.epix.net!uunet!in1.uu.net!155.229.2.176!metro.atlanta.com!news.radio.org!wa4mei!ke4zv!gary
From: [e-mail] (Gary Coffman)
Subject: Re: Cable noise???
Message-ID: <[e-mail]>
Reply-To: [e-mail] (Gary Coffman)
Organization: Destructive Testing Systems
References: <58j61p$[e-mail]>
Date: Fri, 13 Dec 1996 18:04:59 GMT
Lines: 34
Xref: news1.epix.net rec.video.cable-tv:28712 rec.radio.amateur.homebrew:22050

In article <58j61p$[e-mail]> [e-mail] (Michael Horo
witz) writes:
>I'm looking at the video signal coming out the back of my VCR, and see
>the classic horizontal sync pulse, color burst and video; however,
>there is a faint trace, running horizontally, at the lowest point of
>the horizontal sync pulse. This means that unless I can clean up the
>signal, I can't use the pulse as a trigger. Anyone have an idea how
>the signal can be cleaned up? - Mike

The faint trace you are seeing is the vertical sync pulse. When triggered
at an H rate, the scope shows you every line in the video field superposed.
A number of those lines are the vertical interval (that black bar across
the picture when you roll down the vertical hold control on the monitor).
This is negative going (with equalizing pulses) for several horizontal
lines at the beginning of each video field. That shows up on the scope.
In other words, what you are seeing is completely normal.

Slow the sweep speed down to 20ms per division and you'll see the
vertical sync pulse in all its glory.

You need a sync separator circuit to separate H and V sync pulses
if the circuit you want to trigger can't tolerate the presence of
V sync at the start of each field. There are equalizing pulses at
twice the H rate during the vertical interval. You'll also need to
deal with this in order to regenerate H rate pulses during that
period. (If you look carefully at the display you have now, you
can see these equalizing pulses as faint pulses halfway between
the H sync pulses.)

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 13:24:55 1996
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!sn.no!news-stkh.gsl.net!news.gsl.net!eru.mt.luth.se!pumpkin.pangea.ca!news.mira.net.au!news.netspace.net.au!news.mel.connect.com.au!news.mel.aone.net.au!cheese.pcug.org.au!supreme!parkerp
From: Peter Parker <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: CB to Ten
Date: Thu, 19 Dec 1996 07:05:08 +1100
Organization: Customer of Access One Pty Ltd, Melbourne, Australia
Lines: 12
Message-ID: <Pine.SOL.3.91.961219070114.10115B-100000@supreme>
NNTP-Posting-Host: cheese.pcug.org.au
Mime-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
X-Sender: parkerp@supreme

Hi All... I have an old Johnson Viking 352D 23 channel CB that I would
like to get going on ten metres. I know that they can be converted to 28
Mhz and that a switch to provide a 5kHz offset can be provided.

Does anyone know how to do this? I have a similar set I bought that was
already modified, and it's a real good radio - the receiver is better
than my Kenwood TS120V.

73, Peter  Vk1PK

WE DO MORE WITH LESS: CW OPS QRP CLUB #66



From [e-mail] Sat Dec 21 13:24:56 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!swrinde!ihnp4.ucsd.edu!news1.ucsd.edu!news-mail-gateway
From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Chautauqua Hamfest
Date: 19 Dec 96 22:03:54 GMT
Organization: ucsd usenet gateway
Lines: 11
Message-ID: <[e-mail]>
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]

WESTERN NEW YORK HAMFEST!

The First Annual Chautauqua County Hamfest will be held on Saturday,
February 15
at Westfield School on Route 20 in Westfield, NY.  The location is
between Erie, PA and Buffalo, NY.  Admission is $4 in advance or $5 at
the door and tables are only $4 each.  Setup is at  7 a.m. and the fest
itself runs from 8 a.m. to 3 p.m.  Refreshments will be available.  For
more information, please contact John Hagle, AA2GV at [e-mail].
                                             Dave  KE9ED



From [e-mail] Sat Dec 21 13:24:56 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!news.idt.net!newsfeed.internetmci.com!news.ns.net!usenet
From: Dane Westvik <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: chips for communications
Date: Mon, 16 Dec 1996 12:39:15 -0800
Organization: NextGen Systems Internet Services
Lines: 8
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: sbmpos.ns.net
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 2.0 (Win95; I; 16bit)

Paul wrote:
>
> were can I get INFORMATION on specilized chips used in remote
> transmitters such as remote door bells or car alarms and the like.Check out
HOLTEK. Their web site (www.holtek.com) has PDF datasheets.
These are also available from Jameco, JDR, etc.

-Dane
KO6YD


From [e-mail] Sat Dec 21 13:24:57 1996
Path: news1.epix.net!news3.epix.net!uunet!in1.uu.net!199.0.65.182!news-in.tiac.net!posterchild![e-mail]
From: Paul <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: chips for communications
Date: Mon, 16 Dec 1996 12:14:22 -0800
Organization: not very
Lines: 2
Message-ID: <[e-mail]>
NNTP-Posting-Host: kelleypf.tiac.net
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.01Gold (Win16; I)

were can I get INFORMATION on specilized chips used in remote
transmitters such as remote door bells or car alarms and the like.


From [e-mail] Sat Dec 21 13:24:58 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.sprintlink.net!news-peer.sprintlink.net!news1.noc.netcom.net!noc.netcom.net!gate.actel.com!usenet
From: John McGowan <[e-mail]>
Newsgroups: ba.forsale,fj.rec.radio,rec.antiques.radio+phono,rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.amateur.misc,rec.radio.swap,ba.marketplace
Subject: Classic Vacuum Tube / Radio Books
Date: Wed, 11 Dec 1996 14:56:27 -0800
Organization: Actel Inc.
Lines: 24
Message-ID: <[e-mail]>
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CC: jem
Xref: news1.epix.net fj.rec.radio:3338 rec.antiques.radio+phono:33365 rec.radio.amateur.equipment:44146 rec.radio.amateur.homebrew:21972 rec.radio.amateur.misc:120352 rec.radio.swap:99218

I have three classic texts, all in excellent condition,
which I am looking to unload as I will have no need for them.
I hope to find them a good home.

        1. RCA, _Receiving Tube Manual_, 1947.

        2. RCA, _Radiotron Designer's Handbook, 3d Ed._, 1942.

        3. Reich, _Theory and Application of Electron Tubes_, 1939.


        I request at a minimum that one pay postage, if
applicable. I live in the San Francisco Bay Area. What are these
worth? Please contact me if interested.



        Happy Holidays,


        John

        [e-mail]
        [e-mail]


From [e-mail] Sat Dec 21 13:24:59 1996
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From: [e-mail] (Spencer Trombly)
Newsgroups: rec.radio.amateur.homebrew
Subject: Coax connectors
Date: 14 Dec 96 06:29:31 GMT
Organization: ucsd usenet gateway
Lines: 18
Message-ID: <Pine.SUN.3.94.961214010150.21022A-100000@polaris>
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]

My company has several trimble RTK GPS receivers and I have replaced some
of the RG214 antenna cables with RG8X. The antenna connector is  an "N"
and the receiver end is a single pin LEMO. The EZ "N" from the wireman
works ok with the adaptor sleeve for RG59. The EZ N has 2 seals when it
screws together and it seems splash proof. I use scotch #23 rubber tape
where the coax enters the connector. We also use 470 Mhz RF modems to
transmit GPS corrections. The RF connectors on the modems are BNC type
and the BNC connectors sold by the wireman for RG8X work good. RG8X is
about the same OD as RG59 coax. I used the 75 ohm BNC connectors on the
RG8X before I knew the wireman sold the BNC connectors for RG8X.
The RG8X from the wireman is nice stuff compared to the RADIO SHACK
crap. The wireman advertises in the ham mags. Very good prices and
delivery.
73
Spencer W1GAK





From [e-mail] Sat Dec 21 13:25:00 1996
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From: [e-mail] (JohnsonHE)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Coax Connectors Impedance
Date: 12 Dec 1996 15:51:15 GMT
Organization: AOL http://www.aol.com
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Message-ID: <[e-mail]>
References: <[e-mail]>
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X-Admin: [e-mail]

Yes, 50 ohm BNC's have rounded tip on inner conductor. 75 ohm have sharp
point on end of inner conductor. If you'll look at the hole in the back of
the tip, where the coax inner conductor is soldered, the one for 75 ohm
coax is too small by a whole lot to accept 50 ohm coax.

W4ZCB


From [e-mail] Sat Dec 21 13:25:01 1996
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From: Philip Peake <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Coax Connectors Impedance
Date: Thu, 12 Dec 1996 12:41:17 -0800
Organization: Teleport - Portland's Public Access [phone]
Lines: 21
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References: <[e-mail]> <[e-mail]>
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[e-mail] wrote:
>
> In regard to Jeanne's query, I believe there are 75-ohm BNC's, as well as
> 50-ohm types.  Could someone more knowledgeable tell us how to
> distinguish them?
>                                      Dave KE9ED

Its easy if you have the two together. The only difference is the
pin diameter (and, of course, the insulator which holds the pin
in place).

The thicker pin is the 50 ohm one.

Putting a 75 ohm BNC plug onto a 75 ohm socket may or may not work,
depending upon if the pin touches or not - it certainly won't be
a reliable connection. Putting a 50 ohm plug onto a 75 ohm socket will
destroy it - one half of the center connector on the socket will
break off - I have seen this happen too many times. And guess
how easy it is to find 75 ohm BNC sockets ?

Philip


From [e-mail] Sat Dec 21 13:25:03 1996
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From: [e-mail] (Stephen Muther)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Coax Connectors Impedance
Date: 12 Dec 1996 15:22:59 -0800
Organization: BEST Internet Communications
Lines: 31
Message-ID: <58q44j$[e-mail]>
References: <[e-mail]> <[e-mail]> <[e-mail]>
NNTP-Posting-Host: shellx.best.com

In article <[e-mail]>,
Philip Peake  <[e-mail]> wrote:
>[e-mail] wrote:
>>
>> In regard to Jeanne's query, I believe there are 75-ohm BNC's, as well as
>> 50-ohm types.  Could someone more knowledgeable tell us how to
>> distinguish them?
>>                                      Dave KE9ED
>
>Its easy if you have the two together. The only difference is the
>pin diameter (and, of course, the insulator which holds the pin
>in place).
>
>The thicker pin is the 50 ohm one.
>
>Putting a 75 ohm BNC plug onto a 75 ohm socket may or may not work,
>depending upon if the pin touches or not - it certainly won't be
>a reliable connection. Putting a 50 ohm plug onto a 75 ohm socket will
>destroy it - one half of the center connector on the socket will
>break off - I have seen this happen too many times. And guess
>how easy it is to find 75 ohm BNC sockets ?
>
>Philip

I've noticed that even on the finest of video equipment, the
manufacturers use 50 ohm BNC connectors in a 75 ohm system.
The difference is probably not worthy of thought at baseband
video frequencies but might be at higher RF.

Steve M. WF6R



From [e-mail] Sat Dec 21 13:25:03 1996
Newsgroups: rec.radio.amateur.homebrew
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From: Bob Lewis <[e-mail]>
Subject: Re: Coax Connectors Impedance
Message-ID: <[e-mail]>
Date: Thu, 12 Dec 1996 08:21:52 -0500
References: <[e-mail]> <[e-mail]>
Organization: AA4PB
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[e-mail] wrote:
>
> In regard to Jeanne's query, I believe there are 75-ohm BNC's, as well as
> 50-ohm types.  Could someone more knowledgeable tell us how to
> distinguish them?
>                                      Dave KE9ED

As far as I know the only difference is the size of the hole through
which the outer insulation passes (the 75 ohm RG59 cable is larger
diameter). Since both sizes of connectors mate with each other I doubt
that there is any real impedance difference.



From [e-mail] Sat Dec 21 13:25:04 1996
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From: "Dale R. Parfitt" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Coax Connectors Impedance
Date: Thu, 12 Dec 1996 22:03:01 -0500
Organization: PAR Electronics
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To: [e-mail]

[e-mail] wrote:
>
> In regard to Jeanne's query, I believe there are 75-ohm BNC's, as well as
> 50-ohm types.  Could someone more knowledgeable tell us how to
> distinguish them?
>                                      Dave KE9ED

The center pins are considerably smaller in diameter as are the female
mating center sockets.

Dale W4OP


From [e-mail] Sat Dec 21 13:25:05 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Coax Connectors Impedance
Date: 13 Dec 96 16:20:30 GMT
Organization: ucsd usenet gateway
Lines: 32
Message-ID: <[e-mail]>
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]

Jeanne asked if connectors came in different impedances.  Having read
that BNC's did, but having seen no differences between specimens I
removed from 50-ohm RF and 75-ohm video equipment, I seconded Jeanne's
question, only to provoke the following response:.

            From: [e-mail] (Jim Weir)
            Subject: Coax Connectors Impedance

            [e-mail] shared these priceless pearls of wisdom:

            ->In regard to Jeanne's query, I believe there are 75-ohm
BNC's, as well as
            ->50-ohm types.  Could someone more knowledgeable tell us how
to
            ->distinguish them?

             Pink and blue booties??

             Jim

Since it turns out from the other, more useful responses that a few
manufacturers
have apparently used similar pins in both varieties, that some 75-ohm
BNC's will mate with 50-ohm types, that some vendors use 50-ohm types in
75-ohm systems, and that there are older and newer types of 75-ohm BNC's,
the matter is hardly as simple as Jim suggests.   As for the "priceless
pearls of wisdom," I thought I was being a gentleman in seconding a
question that had provoked a very unkind response.   Perhaps in another
life I got Jim's goat.
                                                                     Dave
 KE9ED



From [e-mail] Sat Dec 21 13:25:06 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Coax Connectors Impedance
Date: Sun, 15 Dec 1996 02:35:26 -0800
Organization: Pacific Bell Internet Services
Lines: 26
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[e-mail] wrote:
>
> In regard to Jeanne's query, I believe there are 75-ohm BNC's, as well as
> 50-ohm types.  Could someone more knowledgeable tell us how to
> distinguish them?
>                                      Dave KE9ED

Dave,

There are true 75-ohm BNC's, an example is the Kings male BNC that fits
Belden 1694A 75-ohm serial digital video cable.  1694A cable passes
270-megabit/sec serial data, and impedance at all connections must be
carefully controlled.  1694A cable is about 3/8" O/D.   I forget the
Kings part number right now but can look it up.   You can get true 75-ohm
BNC's at Pacific Radio, Hollywood, CA, and from H.L. Dalis Co. on Long
Island.

Rather than try to tell the 50 from 75 ohm connectors by appearance,
I just look at the part number stamped on the outer edge of the coupling
ring.

At work, we're rebuilding  TV studios, converting them to digital, and
use these BNC's by the thousands.

Mike WA3RVS
KTLA-TV Los Angeles


From [e-mail] Sat Dec 21 13:25:07 1996
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From: "William M. Spaulding, Sr." <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Coax Connectors Impedance
Date: 15 Dec 1996 14:49:57 GMT
Organization: WMS Electronics/Consulting
Lines: 23
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References: <[e-mail]> <[e-mail]>
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X-Newsreader: Microsoft Internet News 4.70.1155

Since the impedance of a coaxial system is related to the log of the ratio
of conductor diameters, the center pin of a 75 ohm BNC is smaller than a 50
Ohm version.

Usually, the 75-ohm variety comes with a machined groove around the
circumference to mark it as a 75 piece.

Since center pins are larger, don't plug 50's into 75's.

Clear as mud?

73's
Bill
NA7Y


[e-mail] wrote in article
<[e-mail]>...
> In regard to Jeanne's query, I believe there are 75-ohm BNC's, as well as
> 50-ohm types.  Could someone more knowledgeable tell us how to
> distinguish them?
>                                      Dave KE9ED
>


From [e-mail] Sat Dec 21 13:25:08 1996
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From: Zack Lau <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Coax Connectors Impedance
Date: Wed, 18 Dec 1996 13:46:37 -0500
Organization: American Radio Relay League
Lines: 14
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]> <01bbea97$063c5880$039a76cc@billspau>
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I'd recommend buying/using high quality connectors that
are marked with part numbers to avoid problems. I use
UG-88 male BNC connectors for RG-58/223/142.  Zack W1VT.

BTW, You want to avoid UG-932s, which sort of look like
BNCs but are actually MHV connectors designed for high
voltage applications.

> <[e-mail]>...
> > In regard to Jeanne's query, I believe there are 75-ohm BNC's, as well as
> > 50-ohm types.  Could someone more knowledgeable tell us how to
> > distinguish them?
> >                                      Dave KE9ED
> >


From [e-mail] Sat Dec 21 13:25:11 1996
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From: woody white <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Coax Connectors Impedance
Date: Thu, 19 Dec 1996 01:42:19 -0800
Organization: http://www.geocities.com/capecanaveral/3722
Lines: 37
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]> <01bbea97$063c5880$039a76cc@billspau> <[e-mail]> <599rek$[e-mail]>
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The "snout" (center pin/insulator/ground fingers) protrude beyond the
bayonet ring more (about .06 to .1 inch as I remember) on the plug.  It
will not readily mate w/ standard BNC.  There is also a SHV
connector which is rated for even higher voltages - the insulator/gnd
fingers extend further yet and center contact is recessed...   _Woody_


Jeff Anderson wrote:
>
> In <[e-mail]> Zack Lau <[e-mail]> writes:
> >
> >I'd recommend buying/using high quality connectors that
> >are marked with part numbers to avoid problems. I use
> >UG-88 male BNC connectors for RG-58/223/142.  Zack W1VT.
> >
> >BTW, You want to avoid UG-932s, which sort of look like


> >BNCs but are actually MHV connectors designed for high
> >voltage applications.
> >
> Zack,
>
> For the uninitiated, what sort of visual differences are there between
> the UG-932 and standard BNC's?
>
> Thanks,
>
> - Jeff, WA6AHL

--
de  Woody (WB4QXE) -  [e-mail]
Electron Microscopist/Microanalysist,
Ham radio "homebrewer", shade tree mechanic,
'90 Nissan 240SX, wish still had my Mcycle too!
http://www.geocities.com/capecanaveral/3722
.


From [e-mail] Sat Dec 21 13:25:12 1996
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From: [e-mail] (Wes Stewart)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Coax Connectors Impedance
Date: Wed, 18 Dec 1996 21:26:32 LOCAL
Organization: Starnet
Lines: 14
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]> <01bbea97$063c5880$039a76cc@billspau> <[e-mail]>
NNTP-Posting-Host: usr1ip42.azstarnet.com
X-Newsreader: Trumpet for Windows [Version 1.0 Rev B final beta #4]

In article <[e-mail]> Zack Lau <[e-mail]> writes:
>From: Zack Lau <[e-mail]>
>Subject: Re: Coax Connectors Impedance
>Date: Wed, 18 Dec 1996 13:46:37 -0500

[snip]

>BTW, You want to avoid UG-932s, which sort of look like
>BNCs but are actually MHV connectors designed for high
>voltage applications.

But what if I WANT to use them for high voltage applications?<G>

N7WS


From [e-mail] Sat Dec 21 13:25:13 1996
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From: [e-mail] (Dave Martindale)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Coax Connectors Impedance (yes, there *are* 75 ohm BNCs)
Date: 20 Dec 1996 09:28:33 -0800
Organization: Computer Science, University of B.C., Vancouver, B.C., Canada
Lines: 24
Message-ID: <59eic1$[e-mail]>
References: <[e-mail]> <[e-mail]>
NNTP-Posting-Host: harpo.cs.ubc.ca

[e-mail] writes:
>In regard to Jeanne's query, I believe there are 75-ohm BNC's, as well as
>50-ohm types.  Could someone more knowledgeable tell us how to
>distinguish them?
>                                     Dave KE9ED

Many people have described how to tell BNC connectors designed for RG-59
cable by the larger clamp diameter.  However, these are still 50-ohm
connectors being used on 75 ohm cable.

There *are* BNC connectors with a characteristic impedance of 75 ohms,
and you will find them on some high-quality video equipment.  You can
identify them because the dielectric inside the connector itself is
air, not Teflon.  The physical dimensions of the mating parts are the same,
so the 50- and 75-ohm versions will connect to each other.  But the female
75-ohm connector has a bare center conductor socket without the usual
Teflon cylinder around it, while the male connector has no Teflon cylinder
just inside the ground contact barrel.

I guess keeping the conductor diameters the same but changing the dielectric
to air shifts the impedance to 75 ohms.  Of course, the voltage rating is
reduced - but these connectors are used with 1 V signals.

        Dave


From [e-mail] Sat Dec 21 13:25:14 1996
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From: [e-mail] (Jeanne Pitz)
Newsgroups: rec.radio.amateur.homebrew
Subject: Coax connectors impedence
Date: 11 Dec 96 16:35:50 GMT
Organization: ucsd usenet gateway
Lines: 22
Message-ID: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]

Hi,
I have  a dumb question I hope someone will help me with. I have some
coax connectors I bought to use on a homebrew antenna. I don't know
now if they are 50 ohm or 75 ohm impedence. (I didn't realize it when
I bought them and they aren't marked.) Is there an easy way to tell?
Would 50 ohm connectors have some physical telling difference or can
I measure them with me ohm meter to tell?

Thanks for your help.

--
Regards,
Jeanne
+-------------------------------------------------------------------------+
|Jeanne Pitz, Ph.D.                       Mixed Signal Design Department  |
|[e-mail]                             Texas Instruments, Inc.         |
|MSGid JKP                                MS 8213 PO BOX 655303           |
|972-997-3759                             Dallas, TX 75265                |
|                                                                         |
| Do not go where the path may lead, go instead where there is no path    |
| and leave a trail. -Ralph Waldo Emerson                                 |
+-------------------------------------------------------------------------+


From [e-mail] Sat Dec 21 13:25:16 1996
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From: Larry Robison <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Coax connectors impedence
Date: Wed, 11 Dec 1996 17:09:04 -0500
Organization: Robison and Associates
Lines: 28
Message-ID: <[e-mail]>
References: <[e-mail]>
Reply-To: [e-mail]
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Hi Jeanne:

Connector impedance isn't as confusing as it may seems.  The only
connectors that are true 50 ohm connectors are "N" and "BNC" connectors.
The thing that establishes them as constant impedance connectors is the
dimensions of the center conductor pins and the interior dimension of
the shell. As in a piece of coax this is the primary thing that
determines impedance.  The impedance of the connector is really only
important in feedlines that are used on frequencies above 30 Mhz.
It used to be that only the purists were concerned with 50 ohm
connectors because they were always somewhat more difficult to install
and were more expensive than their counterpart the PL259.

The PL259 is the old standard for most amateur work because they were
readily available, cheap, and fairly easy to install. They will handle
the power that most amateur equipment produces, all the way up to a
couple of kilowatts without too much trouble.  Since their design is not
such that they qualify for being a "constant impedance connector" they
are used in either 75 ohm cable or 50 ohm cable with equal success.

The PL259 adapters that state that they are for RG58 cable or RG59 cable
has nothing to do with impedance.  It more has to do with how snugly
they fit around the cable, thus preventing physical movement from
destroying the integrity of the connection.

I hope this helps.

Larry W9MDX


From [e-mail] Sat Dec 21 13:25:17 1996
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From: woody white <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Coax connectors impedence
Date: Thu, 12 Dec 1996 01:11:03 -0800
Organization: http://www.geocities.com/capecanaveral/3722
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Hello....
You didn't mention which type of connector you have, but...  In general
the previous post about BNC and type N is true.  Ther ARE other 50 ohm
connectors, but less common: SMC, Microdot, HN, etc...  I have
observed that BNC and N connectors do come in other than 50 ohm.  The
higher impedance connectors usually have a smaller diameter center pin
for the same size finger stock shield connection (plug).  Beware that the
higher Z plugs will mate to a 50 ohm receptacle, but the center contact
is very unreliable - a loose fit.  For non-critical applications, I have
made them work by carefully increasing the pin diameter using silver
bearing solder. [ | =  pin; () = solder: ( | ) ].  I don't think I would
do this if the connection was crucial or difficult to access for
repair/replacement.
Woody


Jeanne Pitz wrote:
>
> Hi,
> I have  a dumb question I hope someone will help me with. I have some
> coax connectors I bought to use on a homebrew antenna. I don't know
> now if they are 50 ohm or 75 ohm impedence. (I didn't realize it when
> I bought them and they aren't marked.) Is there an easy way to tell?
> Would 50 ohm connectors have some physical telling difference or can
> I measure them with me ohm meter to tell?
>
> Thanks for your help.
>
> --
> Regards,
> Jeanne
> +-------------------------------------------------------------------------+
> |Jeanne Pitz, Ph.D.                       Mixed Signal Design Department  |
> |[e-mail]                             Texas Instruments, Inc.         |
> |MSGid JKP                                MS 8213 PO BOX 655303           |
> |972-997-3759                             Dallas, TX 75265                |
> |                                                                         |
> | Do not go where the path may lead, go instead where there is no path    |
> | and leave a trail. -Ralph Waldo Emerson                                 |
> +-------------------------------------------------------------------------+

--
de  Woody (WB4QXE) -  [e-mail]
Electron Microscopist/Microanalysist,
Ham radio "homebrewer", shade tree mechanic,
'90 Nissan 240SX, wish still had my Mcycle too!
http://www.geocities.com/capecanaveral/3722
.


From [e-mail] Sat Dec 21 13:25:19 1996
Newsgroups: rec.radio.amateur.homebrew
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From: Bob Morris K2RK <[e-mail]>
Subject: Re: Coax connectors impedence
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Jeanne Pitz wrote:
>
> Hi,
> I have  a dumb question I hope someone will help me with. I have some
> coax connectors I bought to use on a homebrew antenna. I don't know
> now if they are 50 ohm or 75 ohm impedence. (I didn't realize it when
> I bought them and they aren't marked.) Is there an easy way to tell?
> Would 50 ohm connectors have some physical telling difference or can
> I measure them with me ohm meter to tell?
>
> Thanks for your help.
>
> --
> Regards,
> Jeanne
> +-------------------------------------------------------------------------+
> |Jeanne Pitz, Ph.D.                       Mixed Signal Design Department  |
> |[e-mail]                             Texas Instruments, Inc.         |
> |MSGid JKP                                MS 8213 PO BOX 655303           |
> |972-997-3759                             Dallas, TX 75265                |
> |                                                                         |
> | Do not go where the path may lead, go instead where there is no path    |
> | and leave a trail. -Ralph Waldo Emerson                                 |
> +-------------------------------------------------------------------------+

I shouldn't do this, I really should not do this....I'm sorry....
I don't want to do this...................but ???

-- Ph.D.
-- Mixed Signal Design Department
-- Texas Instruments, Inc.

"can I measure them (coax connector impedence)with me ohm meter to
tell?"

What's wrong with this picture ?

I said I was sorry....


From [e-mail] Sat Dec 21 13:25:21 1996
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From: Tom McDermott <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Coax connectors impedence
Date: Thu, 12 Dec 1996 10:04:38 -0600
Organization: Alcatel Network Systems
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CC: [e-mail]

> Jeanne Pitz wrote:
> >
> > Hi,
> > I have  a dumb question I hope someone will help me with. I have some
> > coax connectors I bought to use on a homebrew antenna. I don't know
> > now if they are 50 ohm or 75 ohm impedence. (I didn't realize it when
> > I bought them and they aren't marked.) Is there an easy way to tell?
> > Would 50 ohm connectors have some physical telling difference or can
> > I measure them with me ohm meter to tell?
> >
> > Thanks for your help.
> >
> > --
> > Regards,
> > Jeanne
> >


        If you have BNC connectors, then the 50-ohm and 75-ohm
version have two differences:

1) the center pin in the 50-ohm connector is larger diameter
   than the 75-ohm connector,

2) the female 75-ohm BNC contains just the female metal contact in the
center of the connector,  while the 50-ohm BNC has a plastic
shroud surrounding the female metal contact in the center of the
connector.

If you try to fit a 50-ohm male BNC into a 75-ohm female BNC, you
will deform the metal contact, making it intermittant, or in the
worst case, breaking it.

The plastic shroud of the 50-ohm female BNC makes it more difficult
to mangle or deform the metal contact compared to the 75-ohm female
BNC connector which offers no protection to the metal contact.


Tom McDermott
[e-mail]


From [e-mail] Sat Dec 21 13:25:22 1996
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From: Philip Peake <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Coax connectors impedence
Date: Thu, 12 Dec 1996 16:02:49 -0800
Organization: Teleport - Portland's Public Access [phone]
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Jeff Anderson wrote:
>
> In <[e-mail]> Tom McDermott
> <[e-mail]> writes:
> >
> >       If you have BNC connectors, then the 50-ohm and 75-ohm
> >version have two differences:
> >
> >1) the center pin in the 50-ohm connector is larger diameter
> >   than the 75-ohm connector,
> >
> >2) the female 75-ohm BNC contains just the female metal contact in the
> >center of the connector,  while the 50-ohm BNC has a plastic
> >shroud surrounding the female metal contact in the center of the
> >connector.
> >
> >If you try to fit a 50-ohm male BNC into a 75-ohm female BNC, you
> >will deform the metal contact, making it intermittant, or in the
> >worst case, breaking it.
> >
> >The plastic shroud of the 50-ohm female BNC makes it more difficult
> >to mangle or deform the metal contact compared to the 75-ohm female
> >BNC connector which offers no protection to the metal contact.
> >
> >
> >Tom McDermott
> >[e-mail]
>
> Tom,
>
> My documentation states that 50 ohm and 75 ohm BNC connectors are
> intermatable.  That is, there should be no destructive metal
> deformation when mating a 50 ohm male BNC to a 75 ohm female BNC.  In
> fact, in the only data book that I could find that has dimensions for
> both series (Kings RF Coaxial Connectors), the diameter of the inner
> pin is the same for both the 75 and 50 ohm male connectors (0.052-0.054
> inches).  And all of the databooks that I have (Kings, AMP, and Berg)
> state that they intermate.

Hmm - I have worked with both and have seena *distinct* difference.
I have also had to replace more than one 75 ohm socket destroyed by some
moron
forcing a 50 ohm connector onto it.

I have also traced inrermittent problems to a different moron using
75 ohm plugs to fit 50 ohm sockets, and the pin sitting nicely in the
middle
of the 50 ohm socket without touching the sides, until a tiny amount
of force is applied to the cable.

Differences *do* exist, I have seen them, I have suffered from them.

Philip


From [e-mail] Sat Dec 21 13:25:23 1996
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From: [e-mail](Jeff Anderson)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Coax connectors impedence
Date: 12 Dec 1996 22:19:33 GMT
Organization: Netcom
Lines: 60
Message-ID: <58q0dl$[e-mail]>
References: <[e-mail]> <[e-mail]> <[e-mail]>
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X-NETCOM-Date: Thu Dec 12  4:19:33 PM CST 1996

In <[e-mail]> Tom McDermott
<[e-mail]> writes:
>
>       If you have BNC connectors, then the 50-ohm and 75-ohm
>version have two differences:
>
>1) the center pin in the 50-ohm connector is larger diameter
>   than the 75-ohm connector,
>
>2) the female 75-ohm BNC contains just the female metal contact in the
>center of the connector,  while the 50-ohm BNC has a plastic
>shroud surrounding the female metal contact in the center of the
>connector.
>
>If you try to fit a 50-ohm male BNC into a 75-ohm female BNC, you
>will deform the metal contact, making it intermittant, or in the
>worst case, breaking it.
>
>The plastic shroud of the 50-ohm female BNC makes it more difficult
>to mangle or deform the metal contact compared to the 75-ohm female
>BNC connector which offers no protection to the metal contact.
>
>
>Tom McDermott
>[e-mail]

Tom,

My documentation states that 50 ohm and 75 ohm BNC connectors are
intermatable.  That is, there should be no destructive metal
deformation when mating a 50 ohm male BNC to a 75 ohm female BNC.  In
fact, in the only data book that I could find that has dimensions for
both series (Kings RF Coaxial Connectors), the diameter of the inner
pin is the same for both the 75 and 50 ohm male connectors (0.052-0.054
inches).  And all of the databooks that I have (Kings, AMP, and Berg)
state that they intermate.

If there is documentation that states otherwise, I'd be grateful if you
could point me to it.

Generally, for many applications it will not matter which type of
connector one uses.  I just checked both a 50 ohm and a 75 ohm version
of an HP 3570A Network Analyzer that I have here, and both use the same
style female BNC.  Ditto for my Tek Vectorscope and Waveform monitor.
At the low frequencies in which these are used, given that the BNC's
are near either the source or the termination impedance, the flavor of
BNC doesn't matter.

Hmmm...does anyone know at what frequencies the selection really starts
to matter?  Suppose I have two 40 foot pieces of 50 ohm coax to connect
between my 50 ohm generator and a 50 ohm load that's 80 feet away.  If
I use a 75 ohm barrel instead of a 50 ohm barrel, at what frequencies
will I start to see an appreciable difference in performance?

I suspect it's when the barrel length becomes an appreciable fraction
of the wavelength of the signal.

- Jeff, WA6AHL




From [e-mail] Sat Dec 21 13:25:25 1996
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From: aiken <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Coax connectors impedence
Date: 13 Dec 1996 02:15:33 GMT
Organization: Megalinx Communications
Lines: 38
Message-ID: <58qe85$[e-mail]>
NNTP-Posting-Host: 206.230.54.131

[e-mail] (Jeanne Pitz) writes: > Hi,
> I have  a dumb question I hope someone will help me with. I have some
> coax connectors I bought to use on a homebrew antenna. I don't know
> now if they are 50 ohm or 75 ohm impedence. (I didn't realize it when
> I bought them and they aren't marked.) Is there an easy way to tell?
> Would 50 ohm connectors have some physical telling difference or can
> I measure them with me ohm meter to tell?
>
> Thanks for your help.
>
> --
> Regards,
> Jeanne
> +-------------------------------------------------------------------------+
> |Jeanne Pitz, Ph.D.                       Mixed Signal Design Department  |

> |[e-mail]                             Texas Instruments, Inc.         |
> |MSGid JKP                                MS 8213 PO BOX 655303           |
> |972-997-3759                             Dallas, TX 75265                |
> |                                                                         |
> | Do not go where the path may lead, go instead where there is no path    |
> | and leave a trail. -Ralph Waldo Emerson                                 |
> +-------------------------------------------------------------------------+


Jeanne;

If they are N connectors, there is a difference.  The 50 Ohm N connector has
a much fatter pin than the 75 ohm connector.  I learned this lesson the hard
way.  I had a 75 ohm connector mounted on a receive antenna located on a tower
at 174 feet. We used a 50 ohm connector and ruined the female connector on
the antenna.  I had to have a tower crew take the antenna down and repair
it.

David Aiken
Station Manager
TV-39
Marion, Ohio



From [e-mail] Sat Dec 21 13:25:26 1996
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From: [e-mail] (Roy Lewallen)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Coax connectors impedence
Date: Fri, 13 Dec 96 09:41:42 GMT
Organization: EZNEC Antenna Software
Lines: 32
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In article <58q0dl$[e-mail]>,
   [e-mail](Jeff Anderson) wrote:

>. . .

>Hmmm...does anyone know at what frequencies the selection really starts
>to matter?  Suppose I have two 40 foot pieces of 50 ohm coax to connect
>between my 50 ohm generator and a 50 ohm load that's 80 feet away.  If
>I use a 75 ohm barrel instead of a 50 ohm barrel, at what frequencies
>will I start to see an appreciable difference in performance?
>
>I suspect it's when the barrel length becomes an appreciable fraction
>of the wavelength of the signal.

It's tough to give a general answer to that question. All that happens is
that you get an impedance transformation from the connector. It will have
the same effect as an inch or two of transmission line of that Z0 inserted
in the system. Of course, the amount of transformation will increase as the
connector gets longer in terms of wavelength (until it reaches 90 degrees
then will decrease, becoming zero at 180 degrees, etc.). I'd expect the
effect to be negligible for most purposes at least through UHF. In the
microwave region, the seriousness of the effect would depend on where it is
in the system and how matching is accomplished. For a transmitting antenna,
a connector near the source would transform the Z seen by the transmitter,
which might be correctable with a matching network. It wouldn't have any
impact on the SWR on the cable beyond it, so wouldn't increase cable loss.
A connector of the wrong Z at the far end of the cable would increase
cable SWR (assuming the antenna is matched without the errant connector)
and would therefore increase cable loss. In a receiving system, the effects
of placement are reversed.

Roy Lewallen, W7EL


From [e-mail] Sat Dec 21 13:25:27 1996
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From: Zack Lau <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Coax connectors impedence
Date: Thu, 12 Dec 1996 10:44:40 -0500
Organization: American Radio Relay League
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Chuck Hanavin wrote:

> I'm no expert, and I'm not so sure if connectors are actually designed
> to have a certain impeadance. I've seen BNC connectors that were
> designed for 50 ohm cable and 75 ohm cable, The end of the cable is
> the same. Unless you're doing microwave stuff, it probally doesn't
> matter. I am sure of one thing, though, you're not going
> to measure the impeadnace with an ohm meter!

        According to G3OSS in the out-of-print RSGB Buyer's guide,
a 50 ohm  BNC plug fitted into a 75 ohm socket can cause the metal
fingers to splay out, damaging the socket.  Conversely, the 75 ohm
plug fitted into a 50 ohm socket may be intermittant.

        OTOH, Amphenol claims to make a line of 75 ohm connectors
with the feature of intermateability with standard 50 ohm BNCs.
Looking at an old 75 ohm Amphenol coax switch, the female center
pins are a little smaller.--Zack W1VT


From [e-mail] Sat Dec 21 13:25:28 1996
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From: [e-mail] ()
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Coax connectors impedence
Date: 13 Dec 1996 17:47:33 GMT
Organization: Comp.Center (RUS), U of Stuttgart, FRG
Lines: 11
Message-ID: <58s4rl$[e-mail]>
References: <[e-mail]> <58n6pu$[e-mail]>
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>I am sure of one thing, though, you're not going
>to measure the impeadnace with an ohm meter!

Nothing is easier than that,

just have the cable long enough that your ohm meter shows a reading
before the reflected wave is back.

73, Moritz DL5UH




From [e-mail] Sat Dec 21 13:25:29 1996
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From: "Ian White, G3SEK" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Coax connectors impedence
Date: Fri, 13 Dec 1996 08:17:38 +0000
Organization: IFW Technical Services
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Jeff Anderson wrote about 50 and 75 ohm BNC connectors:

> And all of the databooks that I have (Kings, AMP, and Berg)
>state that they intermate.
>
>If there is documentation that states otherwise, I'd be grateful if you
>could point me to it.

I ran this topic several months ago in my magazine column, and it
generated some useful some follow-up mail.

Yes, in the ideal world of the connector catalog - top-quality, brand-
new connectors, perfectly assembled - they do intermate.

But the story can be very different in amateur practice, where we re-use
old connectors and assemble them without the benefit of professional
jigs and tooling.

A 50R plug will mate with a 75R socket; but if the plug is assembled
off-center, the socket may be damaged and become unreliable in the long
term. It's quite easy to damage a 75R socket because the end of the
inner connector is unsupported. Also, a 75R socket that has been opened
out by frequent use with 50R plugs can become unreliable with the more
tapered center pin of the 75R plug.

Older-style BNC connectors do not have a captive center pin, and it is
very easy for amateurs to assemble them with the center pin "short" or
"long". This is more likely to lead to problems when the connectors are
not of the same impedance. The more tapered center pin of the 75R plug
can be an intermittent contact in a 50R socket if the pin is assembled
short... unless of course the pin is also assembled off-center!

What convinced me was someone's experience with a large number of new
75R plugs (ordered by mistake) in a computer network that used new 50R
sockets.  The network suffered considerable problems with intermittent
connections. When all the 75R plugs were replaced by 50R plugs, the
problems disappeared completely.

I do agree that the impedance 'bump' within intermated connectors is
negligible, up to and including the 2m band at least, but that still
leaves the reliability problems and the problem of incompatible cable
diameters - 75R cable will not fit into a 50R plug, and 50R cable is not
anchored securely in a 75R plug.

Bottom line: I don't buy 75R BNCs any more, or even keep the ones I've
been given for nothing, and I'm gradually weeding 75R BNCs out of
existing equipment.

The same applies to the older patterns of connectors with non-captive
center pins. I wouldn't buy BNC (or N) connectors with non-captive
center pins any more, not even at surplus or giveaway prices. The more
modern versions have captive center pins which are self-locating and
much more tolerant of amateur assembly methods. They also have improved
braid and cable clamping, and are much easier to re-use.


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] Sat Dec 21 13:25:30 1996
Newsgroups: rec.radio.amateur.homebrew
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From: [e-mail] (Jeroen BELLEMAN)
Subject: Re: Coax connectors impedence
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In article <[e-mail]>,
Tom McDermott  <[e-mail]> wrote:
>
>If you try to fit a 50-ohm male BNC into a 75-ohm female BNC, you
>will deform the metal contact, making it intermittant, or in the
>worst case, breaking it.
>
>The plastic shroud of the 50-ohm female BNC makes it more difficult
>to mangle or deform the metal contact compared to the 75-ohm female
>BNC connector which offers no protection to the metal contact.
>

I've gone through considerable trouble to rid the lab of broken
75 Ohm sockets, and I never cease to harass newbies here to take
good care of connectors.

In my opinion, the people who designed the 75 and 50 Ohm BNCs to
be so closely alike that only specialists can tell them apart
deserve to be fried to a crisp.

And they did it again with N-connectors, and C, and probably some
others I haven't encountered yet.

Is it laziness, unwillingness to design a *different* interface?
Is it a conspiracy? Will they ever learn?

Jeroen Belleman
[e-mail]


From [e-mail] Sat Dec 21 13:25:32 1996
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From: [e-mail] (Wes Stewart)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Coils wire diameter
Date: Wed, 11 Dec 1996 21:31:47 LOCAL
Organization: Starnet
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In article <[e-mail]> Apostolos Bouroussis <[e-mail]
> writes:
>From: Apostolos Bouroussis <[e-mail]>
>Subject: Coils wire diameter
>Date: Thu, 12 Dec 1996 02:33:25 +0200

>I decide to build a Qrp swr meter but in the article the wire for coils
>is coded with a number such N.24 or N.26 e.t.c.
>I go to the local electronics store But they told me this code number
>mean nothing and they ask me what is the diameter of the wire
>Please where i find a list that explain the diameter of the wires that
>is coded by numbers.

>

>Thank's
>
>[e-mail]

I believe, that the numbering system stated probably is AWG (American Wire
Guage).

There is an approximate formula for comverting these numbers to diameter, but
I don't have it at hand.

For the guages you mention, the following might help you:

AWG 28  .0321 cm
AWG 26  .0405 cm
AWG 24  .0511 cm
AWG 22  .0644 cm
AWG 20  .0812 cm

There are also British (NBS) guages which are slightly larger for the same
guage.  I don't believe that for your application, the size will be too
critical.  If you need other sizes, email and I can send them to you.

Regards,  Wes Stewart  - N7WS



From [e-mail] Sat Dec 21 13:25:33 1996
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From: Jim <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Coils wire diameter
Date: 12 Dec 1996 15:45:18 GMT
Organization: IdeaSource
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For solenoid-wound, air-core coils, the diameter of the wire
has relatively little effect on the inductance of the coil,
compared to the effect of the number of turns, the diameter
of the coil, and the turn spacing.

This tends to hold true for core-wound inductors as well.

For non-precision applications (such as yours) choose a wire size
that fits the size core you are using, is easy to wind, and will
handle the expected power level.

Jim N6OTQ
P.S. Before you flame me, use the equation for solenoid-wound coils
in the ARRL handbook, and play with the variables first.  And take a
look at the effect of _total wire length_ on inductance while you're
at it.




From [e-mail] Sat Dec 21 13:25:34 1996
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From: "Ian White, G3SEK" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Coils wire diameter
Date: Thu, 12 Dec 1996 13:33:36 +0000
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Wes Stewart wrote:

>There are also British (NBS) gauges...

That should be "SWG", meaning "(British) Standard Wire Gauge",
not "NBS".

Between about 14 and 30 gauge, subtract 2 from the SWG to find the
nearest US gauge.

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] Sat Dec 21 13:25:35 1996
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From: [e-mail] (Wes Stewart)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Coils wire diameter
Date: Thu, 12 Dec 1996 18:41:42 LOCAL
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In article <[e-mail]> "Ian White, G3SEK" <G3SEK@if
wtech.demon.co.uk> writes:
>From: "Ian White, G3SEK" <[e-mail]>
>Subject: Re: Coils wire diameter
>Date: Thu, 12 Dec 1996 13:33:36 +0000

>Wes Stewart wrote:

>>There are also British (NBS) gauges...

>That should be "SWG", meaning "(British) Standard Wire Gauge",
>not "NBS".

>Between about 14 and 30 gauge, subtract 2 from the SWG to find the
>nearest US gauge.

>73 from Ian G3SEK          Editor, 'The VHF/UHF DX Book'
>                          'In Practice' columnist for RadCom (RSGB)

Greetings Ian,

Gosh, I was just using the tables and designator in my 1956 issue of the
Reference Data for Radio Engineers where it clearly shows "NBS".

73, Wes
>Professionally:
>IFW Technical Services     Clear technical English - world-wide.



From [e-mail] Sat Dec 21 13:25:36 1996
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From: [e-mail] (Tom Bruhns)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Coils wire diameter
Date: 13 Dec 1996 19:05:26 GMT
Organization: Hewlett Packard Corvallis Site
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Wes Stewart ([e-mail]) wrote:

: In article <[e-mail]> Apostolos Bouroussis writes:
: >Please where i find a list that explain the diameter of the wires that
: >is coded by numbers.

: I believe, that the numbering system stated probably is AWG (American Wire
: Guage).

: There is an approximate formula for comverting these numbers to diameter, bu
t
: I don't have it at hand.

For those with calculators or spreadsheets who would like to ditch
their wire tables:

Diameter in inches = 10^(-0.05035 * AWG_number - 0.4884)
Diameter in millimeters =  10^(-0.05035 * AWG_number + 0.9164)

Accurate to better than 0.1% (around 0.02%?)  (Like to see you
find wire that's drawn to that sort of accuracy!).  Use -2 in
formula for AWG 000, for example.


(Also, DC resistance, ohms/1000 feet, at 20C, is very nearly
10^(0.1*AWG - 1), though this is not as accurate as the
diameter formula above...just easy to remember.)

(Guess if you like 10's a lot you could remember that as:
R1000 approx= 10^((AWG-10)/10)     )


--
Cheers,
Tom
[e-mail]


From [e-mail] Sat Dec 21 13:25:38 1996
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From: "Ian White, G3SEK" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Coils wire diameter
Date: Fri, 13 Dec 1996 22:53:38 +0000
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Wes Stewart wrote:
>
>>>There are also British (NBS) gauges...
>
>>That should be "SWG", meaning "(British) Standard Wire Gauge",
>>not "NBS".
>
>Gosh, I was just using the tables and designator in my 1956 issue of the
>Reference Data for Radio Engineers where it clearly shows "NBS".
>

Sorry, Wes, you're right after all... well, kind of.

None of my British handbooks mentions NBS, and neither did US sources
such as the 1950 ARRL Handbook or the 1959/60 and 1977/78 editions of
the Handbook of Chemistry and Physics.

I finally found it in the 1941 edition of Machinery's Handbook:

"This Standard Wire Gage (also known as the Imperial Wire Gage and the
English Legal Standard) is used in England for all wires. The
abbreviation S.W.G. is sometimes used for Standard Wire Gage, also the
abbreviation N.B.S. for New British Standard Wire Gage. This gage was
legalized in Great Britain in 1883."

It seems that Reference Data for Radio Engineers uses wire tables that
date back to the days when NBS really was "New"!


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] Sat Dec 21 13:25:39 1996
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From: [e-mail] (Tom Bruhns)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Coils wire diameter
Date: 16 Dec 1996 18:55:03 GMT
Organization: Hewlett Packard Corvallis Site
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Ian White, G3SEK ([e-mail]) wrote:
(in reply to something Wes Stewart wrote)

: None of my British handbooks mentions NBS, and neither did US sources
: such as the 1950 ARRL Handbook or the 1959/60 and 1977/78 editions of
: the Handbook of Chemistry and Physics.

: I finally found it in the 1941 edition of Machinery's Handbook:

: "This Standard Wire Gage (also known as the Imperial Wire Gage and the
: English Legal Standard) is used in England for all wires. The
: abbreviation S.W.G. is sometimes used for Standard Wire Gage, also the
: abbreviation N.B.S. for New British Standard Wire Gage. This gage was
: legalized in Great Britain in 1883."

: It seems that Reference Data for Radio Engineers uses wire tables that
: date back to the days when NBS really was "New"!

The newer 7th edition, dated 1986, and now called "Reference Data for
Engineers," has a table, "Courtesy Whitehead Metal Products Co., Inc.,"
which is a comparison of various gauge standards.  It lists "AWG B&S,"
"Birmingham or Stubs BWG,"   "Wash. & Moen W&M,"   "British Standard
NBS SWG,"   "London or Old English,"   "United States Standard  US,"
and "American Standard Preferred Thickness."  (The last one isn't
really a gauge number standard...)   I'm sure there are others.  I
would hope the part of the world that's been smart enough to go metric
has also converted to simple metric diameters and thicknesses in place
of gauge numbers, but I guess old habits die hard.  Thank goodness US
manufacturers are getting metricized, even though our kitchens and
roadways are still miles and ounces and tablespoons...

--
Cheers,
Tom
[e-mail]


From [e-mail] Sat Dec 21 13:25:40 1996
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From: [e-mail] (M Simon)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Coils wire diameter
Date: Tue, 17 Dec 1996 02:25:28 GMT
Organization: Space-Time Productions
Lines: 48
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References: <[e-mail]> <5945u7$[e-mail]>
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Volts, Amps, and Watts have always been metric.

Simon
--------------------------------------------------------
[e-mail] (Tom Bruhns) wrote:

>Ian White, G3SEK ([e-mail]) wrote:
>(in reply to something Wes Stewart wrote)

>: None of my British handbooks mentions NBS, and neither did US sources
>: such as the 1950 ARRL Handbook or the 1959/60 and 1977/78 editions of
>: the Handbook of Chemistry and Physics.

>: I finally found it in the 1941 edition of Machinery's Handbook:

>: "This Standard Wire Gage (also known as the Imperial Wire Gage and the
>: English Legal Standard) is used in England for all wires. The
>: abbreviation S.W.G. is sometimes used for Standard Wire Gage, also the
>: abbreviation N.B.S. for New British Standard Wire Gage. This gage was
>: legalized in Great Britain in 1883."

>: It seems that Reference Data for Radio Engineers uses wire tables that
>: date back to the days when NBS really was "New"!

>The newer 7th edition, dated 1986, and now called "Reference Data for
>Engineers," has a table, "Courtesy Whitehead Metal Products Co., Inc.,"
>which is a comparison of various gauge standards.  It lists "AWG B&S,"
>"Birmingham or Stubs BWG,"   "Wash. & Moen W&M,"   "British Standard
>NBS SWG,"   "London or Old English,"   "United States Standard  US,"
>and "American Standard Preferred Thickness."  (The last one isn't
>really a gauge number standard...)   I'm sure there are others.  I
>would hope the part of the world that's been smart enough to go metric
>has also converted to simple metric diameters and thicknesses in place
>of gauge numbers, but I guess old habits die hard.  Thank goodness US
>manufacturers are getting metricized, even though our kitchens and
>roadways are still miles and ounces and tablespoons...

>--
>Cheers,
>Tom
>[e-mail]

In the end people get the government they deserve.

Read "The Weapon Shops of Isher" by A.E. vanVogt

Simon



From [e-mail] Sat Dec 21 13:25:41 1996
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From: [e-mail] (Lars Moell)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Coils wire diameter
Date: Thu, 19 Dec 1996 09:41:56 GMT
Organization: National Defence Research Establishment, Sweden
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Great news

US/UK moving over to metrics - inch by inch!!!!!

/SM5GLC
[e-mail] (Tom Bruhns) wrote:

>Ian White, G3SEK ([e-mail]) wrote:
>(in reply to something Wes Stewart wrote)
>
>: None of my British handbooks mentions NBS, and neither did US sources
>: such as the 1950 ARRL Handbook or the 1959/60 and 1977/78 editions of
>: the Handbook of Chemistry and Physics.
>
>: I finally found it in the 1941 edition of Machinery's Handbook:
>
>: "This Standard Wire Gage (also known as the Imperial Wire Gage and the
>: English Legal Standard) is used in England for all wires. The
>: abbreviation S.W.G. is sometimes used for Standard Wire Gage, also the
>: abbreviation N.B.S. for New British Standard Wire Gage. This gage was
>: legalized in Great Britain in 1883."
>
>: It seems that Reference Data for Radio Engineers uses wire tables that
>: date back to the days when NBS really was "New"!
>
>The newer 7th edition, dated 1986, and now called "Reference Data for
>Engineers," has a table, "Courtesy Whitehead Metal Products Co., Inc.,"
>which is a comparison of various gauge standards.  It lists "AWG B&S,"
>"Birmingham or Stubs BWG,"   "Wash. & Moen W&M,"   "British Standard
>NBS SWG,"   "London or Old English,"   "United States Standard  US,"
>and "American Standard Preferred Thickness."  (The last one isn't
>really a gauge number standard...)   I'm sure there are others.  I
>would hope the part of the world that's been smart enough to go metric
>has also converted to simple metric diameters and thicknesses in place
>of gauge numbers, but I guess old habits die hard.  Thank goodness US
>manufacturers are getting metricized, even though our kitchens and
>roadways are still miles and ounces and tablespoons...
>
>--
>Cheers,
>Tom
>[e-mail]



From [e-mail] Sat Dec 21 13:25:42 1996
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From: [e-mail] (Darrell kimball)
Newsgroups: rec.radio.amateur.homebrew
Subject: Collins Filters
Date: Thu, 19 Dec 1996 15:32:22 GMT
Organization: Corporate Communications
Lines: 2
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WTB Collins 455Khz IF filters. Not Upper/Lower sideband type. Center
freq 455Khz @ 500Hz and 1.2Khz. W1TXX [e-mail]


From [e-mail] Sat Dec 21 13:25:43 1996
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From: [e-mail] (yorshire)
Newsgroups: rec.radio.amateur.homebrew
Subject: components for s.w. homebuilts
Date: 17 Dec 1996 04:16:42 GMT
Organization: enter.net
Lines: 3
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Can anyone recommend a supplier for S.W. components such as r.f. coils,
oscillators, filters, etc. New at building.



From [e-mail] Sat Dec 21 13:25:43 1996
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From: [e-mail] (K1EL)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: components for s.w. homebuilts
Date: 18 Dec 1996 01:04:22 GMT
Organization: AOL http://www.aol.com
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<<Can anyone recommend a supplier for S.W. components such as r.f. coils,
oscillators, filters, etc. ? >>

Here's a good site:

http://www.fix.net/dans.html

Parts and kits, very reasonable prices

Steve K1EL


From [e-mail] Sat Dec 21 13:25:44 1996
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From: [e-mail] (Brian Carling)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: components for s.w. homebuilts
Date: Wed, 18 Dec 1996 20:38:52 GMT
Organization: Glowbugs
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x-no-archive: yes

[e-mail] (yorshire) whistled a happy tune like:

|>Can anyone recommend a supplier for S.W. components such as r.f. coils,
|>oscillators, filters, etc. New at building.

You need the file megalist.txt
available at:
http://www.mnsinc.com/bry/hamfiles.htm

Enjoy!


73 from Bry  (((Amateur Radio G3XLQ / AF4K)))
http://www.mnsinc.com/bry
E-mail:  [e-mail]
Home of MEGALIST ham radio files, SWL info. etc. etc.



From [e-mail] Sat Dec 21 13:25:45 1996
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From: [e-mail] (Garry P. Adkins)
Newsgroups: rec.radio.cb,rec.radio.amateur.misc,rec.radio.amateur.homebrew
Subject: Computer Power Supply for 12v mobile?
Date: 14 Dec 1996 23:04:20 -0500
Organization: Ichthus Access Networking Inc., [phone]
Lines: 21
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Xref: news1.epix.net rec.radio.cb:39350 rec.radio.amateur.misc:120732 rec.radio.amateur.homebrew:22066

Hi.

I have an older 286 computer that doesn't work anymore.  It's
a non-standard case, so I can't put a new motherboard in it.

Since the power supply puts out many amps at 12v on this
particular one...  Could I use it to power a mobile radio?

I realize I would have to apply the "power-good" signal (either
ground it or raise it, don't remember which) to get the supply
to work.. (at least that's how I remember it working, haven't
played with computer power supply in a while)

Would it be stable with no load on the 5v side?  Could I hook a
big transistor to the 5v size (to ground) to let it see a little
load?

If anyone has done this, I'd appreciate any pointers!

Thanks,
Garry


From [e-mail] Sat Dec 21 13:25:47 1996
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From: "Andreas Bahr" <[e-mail]>
Newsgroups: rec.radio.cb,rec.radio.amateur.misc,rec.radio.amateur.homebrew
Subject: Re: Computer Power Supply for 12v mobile?
Date: 17 Dec 1996 12:01:11 GMT
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Garry P. Adkins <[e-mail]> wrote in article
<58vtc4$[e-mail]>...
> Hi.
>
> I have an older 286 computer that doesn't work anymore.  It's
> a non-standard case, so I can't put a new motherboard in it.
>
> Since the power supply puts out many amps at 12v on this
> particular one...  Could I use it to power a mobile radio?
>
> I realize I would have to apply the "power-good" signal (either
> ground it or raise it, don't remember which) to get the supply
> to work.. (at least that's how I remember it working, haven't
> played with computer power supply in a while)
>
> Would it be stable with no load on the 5v side?  Could I hook a
> big transistor to the 5v size (to ground) to let it see a little
> load?
>
> If anyone has done this, I'd appreciate any pointers!
>
> Thanks,
> Garry
>

hi gary
i am using an old pwr-supply for driving lamps, motors, etc.
the 'power-good'-signal is an output i think; he tell's the watchdog of the
computer to protect the memory from writing if power fail's. this is 'cause
the cpu makes bullshit when power is not stable.
i never had problem's with unused power-lines, even if you have, don't use
a transistor, use a simple resistor (try a 50R, 1W).

BUT: The output of a computer-power-supply (a switching-power-supply) is
extremly noisy!!!
this is why i use it for lamps etc, remember that computer work's digital;
if you use the supply for analog gear, you will have problem's.

on the other side, there exist's switching-power-supply's for ham-radio
too. they work with frequencies higher than you can hear and they have much
filtering-parts.

so - if you want use your power-supply - no problem, but don't be surprised
about the 'side-effects'...

have fun...

andreas
[e-mail]


From [e-mail] Sat Dec 21 13:25:48 1996
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From: "Phil M." <[e-mail]>
Newsgroups: rec.radio.cb,rec.radio.amateur.misc,rec.radio.amateur.homebrew
Subject: Re: Computer Power Supply for 12v mobile?
Date: Tue, 17 Dec 1996 16:41:48 -0500
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Garry P. Adkins wrote:
>
> Hi.
>
> I have an older 286 computer that doesn't work anymore.  It's
> a non-standard case, so I can't put a new motherboard in it.
>
> Since the power supply puts out many amps at 12v on this
> particular one...  Could I use it to power a mobile radio?
>
> I realize I would have to apply the "power-good" signal (either
> ground it or raise it, don't remember which) to get the supply
> to work.. (at least that's how I remember it working, haven't
> played with computer power supply in a while)
>
> Would it be stable with no load on the 5v side?  Could I hook a
> big transistor to the 5v size (to ground) to let it see a little
> load?
>
> If anyone has done this, I'd appreciate any pointers!
>
> Thanks,
> Garry

You can do this, but it can get noisy.
The power good is an output to the motherboard, not an input.
You will probably have to build some type of 'filter' board to feed the
output thru,
in order to clean it up a bit, maybe a big cap and a couple chokes.
Also, most supplies will not work unless there is a load on them.
Usually any line will
work, but you can smoke the switching transistors if there's no load on
it.

Enjoy,
Phil


From [e-mail] Sat Dec 21 13:25:50 1996
Newsgroups: rec.radio.cb,rec.radio.amateur.misc,rec.radio.amateur.homebrew
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From: [e-mail] (Gary Coffman)
Subject: Re: Computer Power Supply for 12v mobile?
Message-ID: <[e-mail]>
Reply-To: [e-mail] (Gary Coffman)
Organization: Destructive Testing Systems
References: <58vtc4$[e-mail]>
Date: Fri, 20 Dec 1996 10:16:48 GMT
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Xref: news1.epix.net rec.radio.cb:39683 rec.radio.amateur.misc:121188 rec.radio.amateur.homebrew:22213

In article <58vtc4$[e-mail]> [e-mail] (Garry P.
Adkins) writes:
>I have an older 286 computer that doesn't work anymore.  It's
>a non-standard case, so I can't put a new motherboard in it.
>
>Since the power supply puts out many amps at 12v on this
>particular one...  Could I use it to power a mobile radio?
>
>I realize I would have to apply the "power-good" signal (either
>ground it or raise it, don't remember which) to get the supply
>to work.. (at least that's how I remember it working, haven't
>played with computer power supply in a while)
>
>Would it be stable with no load on the 5v side?  Could I hook a
>big transistor to the 5v size (to ground) to let it see a little
>load?

All of the PC supplies I've seen require a load on the 5 volt
bus to operate correctly. Usually a couple of amps draw is
enough to allow them to maintain regulation. A pair of 10
watt 4.7 ohm power resistors in parallel forms a good load.
They're switchers, of course, and need a load to operate
correctly. Usually the regulation is done on the 5 volt bus,
and the other voltages just follow this.

Most PC supplies only have about 2 amps capacity on the +12 volt
bus, and that isn't enough to power much of an amateur radio. The
bulk of the current capacity is on the 5 volt bus, which may be able
to source 20 amps. Newer supplies also often have a 2 amp capacity on
the -12 volt bus, but older supplies could only source a few hundred
milliamps on the -12 volt bus.

Mostly, I consider PC supplies merely as a source of parts for
amateur radio work. They aren't of much use as power supplies
except in computers and other things which need lots of 5 volt
current. They also often generate a lot of RF noise, and RF
ingress can cause them to lose regulation and allow the output
voltage to soar to very high values. That's a recipe for fried
radio.

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 13:25:52 1996
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From: Sid Boyce <[e-mail]>
Subject: Re: Computer Power Supply for 12v mobile?
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Gary Coffman wrote:
>
> In article <58vtc4$[e-mail]> [e-mail] (Garry P
. Adkins) writes:
> >I have an older 286 computer that doesn't work anymore.  It's
> >a non-standard case, so I can't put a new motherboard in it.
> >
> >Since the power supply puts out many amps at 12v on this
> >particular one...  Could I use it to power a mobile radio?
> >
> >I realize I would have to apply the "power-good" signal (either
> >ground it or raise it, don't remember which) to get the supply
> >to work.. (at least that's how I remember it working, haven't
> >played with computer power supply in a while)
> >
> >Would it be stable with no load on the 5v side?  Could I hook a
> >big transistor to the 5v size (to ground) to let it see a little
> >load?
>
> All of the PC supplies I've seen require a load on the 5 volt
> bus to operate correctly. Usually a couple of amps draw is
> enough to allow them to maintain regulation. A pair of 10
> watt 4.7 ohm power resistors in parallel forms a good load.
> They're switchers, of course, and need a load to operate
> correctly. Usually the regulation is done on the 5 volt bus,
> and the other voltages just follow this.
>
> Most PC supplies only have about 2 amps capacity on the +12 volt
> bus, and that isn't enough to power much of an amateur radio. The
> bulk of the current capacity is on the 5 volt bus, which may be able
> to source 20 amps. Newer supplies also often have a 2 amp capacity on
> the -12 volt bus, but older supplies could only source a few hundred
> milliamps on the -12 volt bus.
>
> Mostly, I consider PC supplies merely as a source of parts for
> amateur radio work. They aren't of much use as power supplies
> except in computers and other things which need lots of 5 volt
> current. They also often generate a lot of RF noise, and RF
> ingress can cause them to lose regulation and allow the output
> voltage to soar to very high values. That's a recipe for fried
> radio.
>
> Gary
> --
        Don't remember where I saw it, but some time ago I saw an article with
details of converting the +5 Volt to +13.8 Volt for use with a
transceiver, can't remember if it was a UK or a USA mag, I'll have a dig
around.
Regards

--
... Sid Boyce...Amdahl(UK)[e-mail]
                   -----------------------------------
Any opinions expressed above are mine and do not necessarily represent
 the opinions or policies of Amdahl Corporation.



From [e-mail] Sat Dec 21 13:25:53 1996
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From: [e-mail] (Brian Kantor)
Newsgroups: rec.radio.cb,rec.radio.amateur.misc,rec.radio.amateur.homebrew
Subject: Re: Computer Power Supply for 12v mobile?
Date: 20 Dec 1996 22:21:19 GMT
Organization: The Avant-Garde of the Now, Ltd.
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My test-bench 12 volt supply is three 5-volt 120-amp switching power
supplies wired in series.  I've turned each one of them down to 4.5
volts giving me a very nice clean 13.5 volt supply.  The ones I have
seem to regulate properly even with no load.
        - Brian


From [e-mail] Sat Dec 21 13:25:54 1996
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From: woody white <[e-mail]>
Newsgroups: rec.radio.cb,rec.radio.amateur.misc,rec.radio.amateur.homebrew
Subject: Re: Computer Power Supply for 12v mobile?
Date: Sat, 21 Dec 1996 01:53:05 -0800
Organization: http://www.geocities.com/capecanaveral/3722
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Hi Brian,

Glad to hear of someone doing that.  Is my plan also if my h'brew linear
13.6v, 100amp supply ever hopelessly blows up...(has been >19 yrs so far,
no failure).  I'll bet yours is lighter! :-)
_Woody_

Brian Kantor wrote:
>
> My test-bench 12 volt supply is three 5-volt 120-amp switching power
> supplies wired in series.  I've turned each one of them down to 4.5
> volts giving me a very nice clean 13.5 volt supply.  The ones I have
> seem to regulate properly even with no load.
>         - Brian

--
de  Woody (WB4QXE) -  [e-mail]
Electron Microscopist/Microanalysist,
Ham radio "homebrewer", shade tree mechanic,
'90 Nissan 240SX, wish still had my Mcycle too!
http://www.geocities.com/capecanaveral/3722
.


From [e-mail] Sat Dec 21 13:25:55 1996
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From: [e-mail] (Richard Hosking)
Newsgroups: rec.radio.amateur.homebrew
Subject: Digital Freq readout for QRP rigs
Date: Sun, 15 Dec 1996 08:41:08 GMT
Organization: iiNet Technologies Pty Ltd
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I am designing a freq counter based on the PIC 1 GHz counter (See web
page) for QRP/other rigs which do not have digital readout
Planned features:

4 User programmable offsets  to 10 Hz resolution. These can be
selected via 2 I/O pins along with a user programmable message (eg
"USB" etc) These are calculated in software (ie not a 10 turn pot/ADC
system which I presume would drift somewhat)

Basic counter resolution around 10 Hz

Bandwidth around 40 MHz

LCD readout

High impedance input so as not to load the LO too much

Simple/small physical size (around 3 by 5 inches for the board)

I will be marketing this at about $90 US for the kit

I would appreciate any ideas re features/cost etc

Thanks

Richard Hosking
VK6BRO
[e-mail]
http://www.iinet.net.au/~richardh



From [e-mail] Sat Dec 21 13:25:56 1996
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From: [e-mail] (Richard Karlquist)
Newsgroups: sci.electronics.design,rec.radio.amateur.homebrew
Subject: Re: Direct conversion FM receiver
Date: 18 Dec 1996 20:13:32 GMT
Organization: Hewlett-Packard
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In article <[e-mail]>,
innovative technologies <[e-mail]> wrote:
>Hello all,
>
>Is there such a thing as a Direct conversion FM receiver, similar to
>designs available for CW and SSB reception? Sensitivity isn't a
>premium.

There are direct conversion FSK receivers used for paging.
I don't see any way this would work for analog (voice) FM,
except, as noted by others, the digitized I and Q technique,
which is more complicated that building a conventional receiver,
and in any event, is unlikely to fit into a watch with present
technology.  If anyone knows how to do this, it would be the
paging watch companies like Seiko.

>I've heard about mini FM receivers for the broadcast FM band (such as
>"wrist watch" or "necklace" versions), that might implement such a
>concept.

I have one of those wrist watch radios.  The one I have is not direct
conversion, rather it uses a 70 kHz. IF.  It gets away with such a
low IF frequency by ignoring the stereo MPX sidebands.  This works
because those sidebands have such a low modulation index that they
can be considered to be phase modulation.  Of course, the recovered
audio is mono.


>Any pointer in the proper direction (either theoretical or a practical
>design) would be truly appreceated, including if there is a difference
>between a WBFM and a NBFM design.

More like the null pointer.

>
>(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/
>

Rick Karlquist
[e-mail]


From [e-mail] Sat Dec 21 13:25:57 1996
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From: Onno Kuijken <[e-mail]>
Newsgroups: sci.electronics.design,rec.radio.amateur.homebrew
Subject: Re: Direct conversion FM receiver
Date: Wed, 18 Dec 1996 18:03:49 +0100
Organization: Philips Semiconductors B.V.
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Jim Potter wrote:
>
> [e-mail] (innovative technologies) wrote:
>
> >Hello all,
> >
> >Is there such a thing as a Direct conversion FM receiver, similar to
> >designs available for CW and SSB reception? Sensitivity isn't a
> >premium.
>
<...>
>
> The tunnel diode served as a mixer and an oscillator, but there was
> only one tuned circuit. The if was essentiallly 150 kHz or so. There
> were no tuned elements in the IF stages. The IF circuit was several
> (4) cascadeded limiters of two transistors each. The output of the
> limiter stages triggered a one shot with fixed pulse width for every
> zero crossing. The one-shot output was averaged to provide the
> detected audio.
>
<...>
>
> The neatest thing about it was that it didn't take any fancy equipment
> to get it going. One could probably duplicate it more compactly with
> modern IC's, but you'd probably want to do something different than
> the tunnel diode front end.
>
> On the other hand, there are some nice chips out there that don't
> require too many add-on parts to make an FM radio. And, you can buy a
> small FM radio with earphones for $9.95 at Wal-Mart.
>
You could try and check out the Philips TDA7000 series, if it still
exists. It has an IF of around 75kHz, in order to get around most
problems of image response, the theory being that if you have a
relatively strong transmitter 150kHz away, either your wanted signal or
the interferer is out-of-grid, and you will have problems anyway with an
el cheapo receiver.

Of true zero-IF receivers (with a selective PLL demodulator operating at
100MHz) I have no idea. But I guess you might run into some serious
problems.

Yes, I *do* have something with these guys. But I won't see it in my
paycheck whether you buy Philips or whatever other brand you like, so go
ahead.

Regards,

Onno
--
---------------------------------------------------------------------------
Onno Kuijken            [e-mail]     ph. [phone]
Philips Semiconductors B.V. PS-SLE                      fax [phone]
Eindhoven, The Netherlands


From [e-mail] Sat Dec 21 13:25:59 1996
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From: [e-mail] (Tom Bruhns)
Newsgroups: sci.electronics.design,rec.radio.amateur.homebrew
Subject: Re: Direct conversion FM receiver
Followup-To: sci.electronics.design,rec.radio.amateur.homebrew
Date: 18 Dec 1996 19:47:30 GMT
Organization: Hewlett Packard Corvallis Site
Lines: 35
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innovative technologies ([e-mail]) wrote:
: Hello all,

: Is there such a thing as a Direct conversion FM receiver, similar to
: designs available for CW and SSB reception? Sensitivity isn't a
: premium.
: I've heard about mini FM receivers for the broadcast FM band (such as
: "wrist watch" or "necklace" versions), that might implement such a
: concept.
: Any pointer in the proper direction (either theoretical or a practical
: design) would be truly appreceated.

You can do it by doing a quadrature conversion to baseband and using
the resulting I and Q signals to find the phase of the signal; then
find the rate of change of phase with respect to time.  This is
fairly easy to do in a DSP with some clever algorithms which I believe
are pretty well known.  (Hope my memory is right on all that.)

You can also convert to a very low IF, digitize it, and process it
with an algorithm which is very similar to an analog quadrature detector:
just convert to, say, 20kHz IF, digitize at 80k samples/second, and
multiply each sample by the previous sample.  Normalize for amplitude
(essentially the analog of a limiter stage).  Run the output thru a
lowpass filter to remove things above half the IF or so.  There is a
90 degree phase shift if the sig is exactly on 20kHz = fs/4, and the
output is zero.  If the sig is above or below that, there is more or
less than 90 degrees phase shift, and the output will be above or below
zero.  I recall the analysis I did on this (straightforward trig functions)
says the output is exactly linear, no distortion.


--
Cheers,
Tom
[e-mail]


From [e-mail] Sat Dec 21 13:26:00 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!oronet!usenet
From: [e-mail] (Jim Weir)
Newsgroups: sci.electronics.design,rec.radio.amateur.homebrew
Subject: Re: Direct conversion FM receiver
Date: Fri, 20 Dec 1996 16:35:34 GMT
Organization: RST Engineering
Lines: 63
Message-ID: <59efad$[e-mail]>
References: <[e-mail]> <599hoi$[e-mail]>
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[e-mail] (Tom Bruhns) shared these priceless pearls of wisdom:

Tom -- help me here (I'm an analog cat in a room full of digital rocking
chairs)

->You can also convert to a very low IF,

Understand.  Mix it with an LO that is close to the desired.  One small
problem is desense of the RF stage with the LO, but that is an RF problem
and not a digital one.  That I can handle.

-> digitize it

in what sense digitize?  Sample at some higher frequency than the IF and
recreate the IF frequency as a bunch of analog dots?  I honestly don't
understand what it means to digitize an analog signal other than sampling
and recreating the same analog signal as a whole potful of digital levels.



, and process it
->with an algorithm which is very similar to an analog quadrature detector:
->just convert to, say, 20kHz IF, digitize at 80k samples/second, and
->multiply each sample by the previous sample.

Multiply digital numbers together?  I'm not sure what we are trying to
achieve.

  Normalize for amplitude
->(essentially the analog of a limiter stage).

Take the highest digital number and normalize all the signal samples to
that?

  Run the output thru a
->lowpass filter to remove things above half the IF or so.

A digital lowpass or have you gone back through a D/A converter to get an
analog signal back?

  There is a
->90 degree phase shift if the sig is exactly on 20kHz = fs/4, and the
->output is zero.

Why?

  If the sig is above or below that, there is more or
->less than 90 degrees phase shift, and the output will be above or below
->zero.

Sounds like a digital discriminator.  I'd really like to learn more about
this technique.  Got a reference that doesn't get too deeply into the
theory and is more of a practical engineering cookbook?

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] Sat Dec 21 13:26:01 1996
Path: news1.epix.net!news3.epix.net!uunet!in2.uu.net!205.252.116.190!feed1.news.erols.com!howland.erols.net!newsfeed.internetmci.com!news1.bellglobal.com!freenet-news.carleton.ca!FreeNet.Carleton.CA!am432
From: [e-mail] (Brice Wightman)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Direct conversion FM receiver
Date: 21 Dec 1996 13:53:05 GMT
Organization: The National Capital FreeNet
Lines: 13
Message-ID: <59gq41$[e-mail]>
References: <[e-mail]> <599hoi$[e-mail]> <59efad$[e-mail]>
Reply-To: [e-mail] (Brice Wightman)
NNTP-Posting-Host: freenet2.carleton.ca
X-Given-Sender: [e-mail] (Brice Wightman)


I missed the beginning of this thread but here is an idea for a simple fm
receiver from a British magazine about 40 years ago:  Pass the modulated
rf signal thru a clipper to give square waves.  Now thru a pipper
(differentiator> to give pulses spaced at every zero crossing.  (Keep only
one polarity).  Now integrate and you have a demodulated signal.


--
===========================================================================
Brice Wightman                                    [e-mail]
Ottawa, Canada                                                       VE3EDR
===========================================================================


From [e-mail] Sat Dec 21 13:26:02 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.net!solace!mn6.swip.net!plug.news.pipex.net!pipex!oleane!in2p3.fr!swidir.switch.ch!surfnet.nl!news.tue.nl!news.IAEhv.nl!news
From: "msimons" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Elec Workbench, something else maybe?
Date: 13 Dec 1996 21:47:04 GMT
Organization: Internet Access Eindhoven, the Netherlands
Lines: 10
Message-ID: <01bbe947$c00c4500$344697c2@marc'scomputer>
References: <01bbe231$5e23cce0$2ded77ce@ka1wgn> <[e-mail]>
NNTP-Posting-Host: pm2d19.iaehv.nl
X-Server-Date: 13 Dec 1996 21:47:04 GMT
X-Newsreader: Microsoft Internet News 4.70.1155

Ever tried circuit maker?
Much better to my opinion! Much more serious! Much more 'the real world' in
transistor parameters, measurement results etc. Also Microcap is quite
interesting too (Version 4) although, quite expensive!
Good luck anyway!

Regards,
Marc




From [e-mail] Sat Dec 21 13:26:03 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!portc01.blue.aol.com!audrey01.news.aol.com!not-for-mail
From: [e-mail] (Rog42)
Newsgroups: rec.radio.amateur.homebrew
Subject: F.S. - Tubes, radios, books and much more...
Date: 12 Dec 1996 23:01:15 GMT
Organization: AOL http://www.aol.com
Lines: 6
Message-ID: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

FOR SALE:  Tubes, test equipment, radios including Hallicrafters,
Hammarlund, and Philco. Other older tube type radios and radio related
publications.  Schematics for many radios just $1.  Tube Manuals, Tube
Substitution books, Service Manuals, QST magazines, much more from the
30's, 40's, 50's, 60's.  Now over 1500 different tube types in stock -
E-mail [e-mail] and ask for my latest RADIO list  - #1123-T.


From [e-mail] Sat Dec 21 13:26:04 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!worldnet.att.net!ix.netcom.com!news
From: [e-mail](MURRAY PASTERNACK )
Newsgroups: rec.radio.swap,misc.industry.electronics.marketplace,rec.audio.tubes,rec.radio.amateur.homebrew
Subject: F.S. : JAN 6186W (6AG5WA) from $.10 each
Date: 18 Dec 1996 02:38:25 GMT
Organization: Netcom
Lines: 22
Message-ID: <597lf1$[e-mail]>
NNTP-Posting-Host: mvo-ca2-22.ix.netcom.com
X-NETCOM-Date: Tue Dec 17  8:38:25 PM CST 1996
Xref: news1.epix.net rec.radio.swap:100002 misc.industry.electronics.marketplace:5360 rec.audio.tubes:19739 rec.radio.amateur.homebrew:22122

For Sale : Tubes type Jan 6186W equal to 6AG5WA. These were made by
Philips in the USA in 1986. All are new and in the original clean
boxes.

        Quantity            Price Each              Shipping

        1 to 24             $.20                    $3.00

        25 to 49            $.18                    $3.00

        50 to 99            $.16                    $3.00

        100 to 499          $.14                    free

        500 to 999          $.12                    free

        1000 to 9999        $.10                    free


        Murray Pasternack
        po box 6117
        Laguna Niguel, CA 92607


From [e-mail] Sat Dec 21 13:26:05 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!mindspring!cpk-news-hub1.bbnplanet.com!news.bbnplanet.com!cam-news-hub1.bbnplanet.com!uunet!in3.uu.net!192.207.105.50!prodigy.com!usenet
From: [e-mail] (Don Klipstein)
Newsgroups: rec.radio.amateur.homebrew
Subject: F/S: X-band klysrtrons, T/R's, maggies, etc
Date: 15 Dec 1996 01:22:05 GMT
Organization: Prodigy Services Company  1-800-PRODIGY
Lines: 38
Distribution: world
Message-ID: <58vjrt$[e-mail]>
NNTP-Posting-Host: innugap1-int.news.prodigy.com
X-Newsreader: Version 1.2

All items are located in Philadelphia, PA. area.
Packing, shipping, etc., not included in price.
Prices are in $US. All reasonable offers will be considered.

NEW tubes are indicated by "NIC" ("new in original carton"),
"NIB" ("new in original box") or "NEW-repacked" for either
bulk tubes which have been repackaged as single items, or
when the original packaging was damaged beyond usefulness.
All tubes are tested and guaranteed.

X-BAND TUBES:                      ($US)  EACH
723A/B-2K25 Klystron ....................(3 available).10.00
CHS-724B, T/R tube (NIC) ..............................15.00
JRC9M80 7.5 KW Magnetron (NEW-repacked)..(2 available).50.00
M599 5KW Magnetron ......................(3 available).25.00
TL368A ATR tube (NEW-repacked) ........................15.00
V-262 Klystron (Varian)................................15.00
VDX1080 ATR tube (NEW-repacked) .........(2 available).15.00

  *****ENTIRE STOCK***** $250.00 *****Shipping included*****

SHIPPING CHARGES (TUBES & ACCESSORIES ONLY)
        Up to $25,     $4.00.
        Up to $50,     $5.00
        Up to $99.50,  $6.00
        Over  $100:    $7.00

        COD AVAILABLE (CASH ONLY!!) add $5.00

TERMS:  Payment with order. Checks will be held 5 business
        days. COD: prices as stated. All items subject to
        prior sale. E-mail for information.








From [e-mail] Sat Dec 21 13:26:06 1996
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.netins.net!usenet
From: Todd Peterson <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: For Sale: Inexpensive PC Interface IC
Date: Fri, 13 Dec 1996 23:43:22 -0600
Organization: netINS, Inc.
Lines: 42
Message-ID: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: desm-06-46.dialup.netins.net
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii; name="hobby.txt"
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.0Gold (Win95; I)
Content-Disposition: inline; filename="hobby.txt"

Been looking for an easy, inexpensive ($13.90 single quantity) way to connect
your hobby to your

PC?  Then please read on!



E-LAB Digital Engineering, Inc. announces the release of their new

EDE300 Interface IC.  It allows for convenient flow of data either from a

PC ot too a PC via the serial port.  Our datasheet even provides

software examples for use with a PC.  NOW IS THE PERFECT OPPORTUNITY TO
INTEGRATE YOUR PC INTO YOUR ELECTRONICS PROJECTS!



Our datasheet is available in electronic format via our webpage at

http://www.netins.net/showcase/elab   or contact us directly at

[e-mail] and include your postal mailing address.



In addition, we will do our best to get you up and running when using

the EDE300, even if your electronics experience is limited.



Todd Peterson

E-LAB Digital Engineering, Inc.

[phone]



Serious dealer inquiries are welcomed as well.




From [e-mail] Sat Dec 21 13:26:06 1996
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!compuserve.com!news.production.compuserve.com!news
From: Jay Craswell <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Front Panel Graphics
Date: 14 Dec 1996 05:46:17 GMT
Organization: Dover Research Corp.
Lines: 5
Message-ID: <58tev9$kq6$[e-mail]>

Hey!  That is some great info.  Send that to QST or whoever.  I would like
to see that in photo form.
73
--
73, Jay WB0VNE - AAV5TH


From [e-mail] Sat Dec 21 13:26:07 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!news
From: [e-mail] (Ron Weaver)
Newsgroups: rec.radio.amateur.homebrew
Subject: FS EIMAC 4-1000-A
Date: 13 Dec 1996 03:27:14 GMT
Organization: Texas Networking, Inc.
Lines: 2
Message-ID: <58qiei$[e-mail]>
NNTP-Posting-Host: client7.sedona.net
Mime-Version: 1.0
X-Newsreader: WinVN 0.93.11

for sale, eimac 4-1000-A, best offer



From [e-mail] Sat Dec 21 13:26:08 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!feed1.news.erols.com!news.idt.net!cdc2.cdc.net!news.texas.net!newsfeed.concentric.net!news-master!not-for-mail
From: [e-mail] (Johnathon Whale)
Newsgroups: rec.radio.amateur.digital.misc,rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.amateur.misc,rec.radio.amateur.policy,rec.radio.amateur.space
Subject: FS: CB Service Manuals (Tram)
Date: 15 Dec 1996 03:43:32 GMT
Organization: Concentric Internet Services
Lines: 25
Message-ID: <58vs54$[e-mail]>
NNTP-Posting-Host: viking.cris.com
X-Newsreader: TIN [UNIX 1.3 950824BETA PL0]
Xref: news1.epix.net rec.radio.amateur.digital.misc:20709 rec.radio.amateur.equipment:44357 rec.radio.amateur.homebrew:22059 rec.radio.amateur.misc:120712 rec.radio.amateur.policy:44213 rec.radio.amateur.space:9143

Organization: Concentric Internet Services
Summary:
Keywords:

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 13:26:09 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!arclight.uoregon.edu!newsfeed.direct.ca!nntp.portal.ca!van-bc!news.rmii.com!newsjunkie.ans.net!newsfeeds.ans.net!news.csd.net!usenet
From: Richard Kiefer <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: FS: MOTROLOA up DEVELOPMENT SYSTEMS
Date: Thu, 19 Dec 1996 20:32:32 -0700
Organization: Computer Systems Design Company
Lines: 30
Message-ID: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: ppp21.csd.net
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.0 (Win95; U)

MOTOROLA
              MICROPROCESSOR
                DEVELOPMENT
              SYSTEMS FOR SALE

We have several microprocessor development systems available for
Motorola 68HC05 and 68HC11.  They are as follows:

1.   Motorola CDS8-Emulation Sytem - For family M68HC05
     microprocessors.  Emulator, three programming modules,
     software, manuals, emulation cables.  Cost approximately
     $5000.  Price $1000.

2.   Motorola M68HC705KICS K-Series In-Circuit Emulator -
     For 68HC05 family microprocessors.  Emulator,
     programming module, software, manuals, emulation cable.
     Cost approximately $750.  Price $250.

3.   Motorola M68HC11EVB Evaluation board - For 68HC11
     up.  Price $50.

4.   Byte Craft C Compiler for M68HC05 family.  License cost
     $800.  Will transfer the license to you for $400.

Thanks for your interest.  Please respond to:

Richard Kiefer
Kiefer Electronic Development
303/449-4700
[e-mail]


From [e-mail] Sat Dec 21 13:26:10 1996
Path: news1.epix.net!news3.epix.net!uunet!in1.uu.net!206.229.87.25!news.sprintlink.net!news-peer.sprintlink.net!howland.erols.net!cliffs.rs.itd.umich.edu!portc01.blue.aol.com!audrey01.news.aol.com!not-for-mail
From: [e-mail] (FisherDoc)
Newsgroups: rec.radio.amateur.homebrew
Subject: FS: NOS Jerrold vacuum tube Post Amplifier
Date: 21 Dec 1996 08:32:38 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 vacuum tube Post Amp model No. SCA 213 CR
Absolutely pristine! Rack mount never used.


Any reasonable offer accepted!

Thanks,
AL
[e-mail]


From [e-mail] Sat Dec 21 13:26:12 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-peer.gsl.net!news.gsl.net!portc01.blue.aol.com!audrey01.news.aol.com!not-for-mail
From: [e-mail] (UTILITYNAM)
Newsgroups: rec.radio.amateur.homebrew
Subject: FS: The Complete RF TECHNICIAN'S Handbook
Date: 17 Dec 1996 15:02:26 GMT
Organization: AOL http://www.aol.com
Lines: 30
Message-ID: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]


------------------------------------------------------------------
THE COMPLETE RF TECHNICIAN'S HANDBOOK
------------------------------------------------------------------
(Published by Howard W. Sams, Inc.)

"The Complete RF Technician's Handbook" is THE book for the radio
communication s beginner, student, or experienced technician, and supplies
priceless information on not only wireless fundamentals, but also the
advanced concepts vital to a successful career in RF communications.

--------------------------------------------------------------------------
--------------------------
***Included are over 400 informative ILLUSTRATIONS and tables***
--------------------------------------------------------------------------
--------------------------

The handbook includes everything a technician needs to know in real-world
RF electronics -- from the fundamental concepts to the more advanced
explanations of modern ANALOG and DIGITAL RADIO circuits and modulation
methods. Furthermore, operational instructions on RF TEST EQUIPMENT, as
well as identifying proper and improper signal waveforms, and AM, FM, PM,
and SSB theory are included. In addition, transmitter and receiver testing
methods and TROUBLESHOOTING TECHNIQUES are solidly covered.
--------------------------------------------------------------------------
--------------------------
For Further Information Please View The Web Site At:
http://members.aol.com/COTTERSAY/rftech.htm




From [e-mail] Sat Dec 21 13:26:14 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!howland.erols.net!cam-news-hub1.bbnplanet.com!news.bbnplanet.com!cpk-news-hub1.bbnplanet.com!newsfeed.internetmci.com!miwok!infoway!don.phelps
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for ampli
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
Lines: 39

Ok, I also have a question or two.
Maybe I missed something about how to test parasitics.

When building my 4-1000A pair linear, I used a variac to increase
the plate voltage cautiously looking for a feared parasitic.
Since the gain of the tube increases with plate voltage,
it happened, that I only got a parasitic when at the target
plate voltage of 6000 volts.

My experience was that for that instant of the parasitic,
I couldn't do much of anything, much less measure it's frequency.
I had a inline fuse in the B+ line, which exploded, the force of
the concussion of the explosion breaking things up to several feet away.
How do you folks measure the frequency of your parasitics when they explode
with such violent force?

What measures are used to test for parasitics in a less
destructive fashion?

 >I have a  question.  Probably shouldn't ask it, but I am going to
 >anyways.  What would happen if the parasitic suppressor was made
 >to be parallel resonant at or near the parasitic frequency.

 Ph> "In fact, a 4-1000A self-oscillates near 110 mhz, and the 4-400A at
 Ph> about 140 mhz. A pair of parallel
 Ph> power tetrodes may act like a push-pull oscillator, oscillating at a
 Ph> frequency that is dependent on the length of their interconnecting
 Ph> leads.

As I have both first, and screen grids grounded, with just
regular plate suppressors in each plate lead (about your
3 turns #12, 1/2" diameter wound on 100 ohm 2 watt resistors)
would we know if the parasitic was push-pull or parallel resonant?

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 13:26:15 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!howland.erols.net!news.sprintlink.net!news-peer.sprintlink.net!worldnet.att.net!uunet!in2.uu.net!207.155.38.10!news.qnet.com!usenet
From: "Will, KN6DV" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Good source for amplifier tips
Date: 12 Dec 1996 06:02:34 GMT
Organization: KN6DV
Lines: 12
Message-ID: <01bbe7f2$107ab640$[e-mail]>
NNTP-Posting-Host: lanc00-18.ca.qnet.com
X-Newsreader: Microsoft Internet News 4.70.1155

For all  who interested in this on going discussion, I have uploaded part 9
(from 12-05-96 to 12-11-96):

http://www.av.qnet.com/~kn6dv
Thanks 73 Will,  KN6DV

REFORM
Unless the reformer can invent something which substisutes attractive
virtues for atractive vices, he will fail.
(Walter Lippmann)

[e-mail]


From [e-mail] Sat Dec 21 13:26:16 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!pandora.digitaladvantage.net!news.upo.com!news4.noc.netcom.net!noc.netcom.net!ix.netcom.com!enews.sgi.com!news.sgi.com!su-news-hub1.bbnplanet.com!cam-news-hub1.bbnplanet.com!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.homebrew
Subject: Re: Good source for amplifier tips
Date: 11 Dec 1996 20:45:42 GMT
Organization: AOL http://www.aol.com
Lines: 54
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] (R. L. Measures ) writes:

>To convert this to its parallel equivalent:
> Y=-1/Z = 1/44.3 ohms, or 22.6 m.s at an angle of -83.5 degrees.  BL =
sine
>of -83.5 degrees*22.6 m.s = 22.4 m.s.  Using X=1/B = 44.64 ohms of XL.  G
=
>cosine of -83.5 degrees * 22.6 m.s = 2.55m/s.  Using R=1/G,  R=44.2 ohms.

Nope. The parallel inductor equivilent is really 43.98 ohms in parallel
with 386.89 ohms. You need to check your math at the G=cos -83.5*22.6ms =
2.55ms area

Let me do it in decimals instead of confusing milli's this and thats.
Using your numbers as the starting point cos -83.5 is .1132032138 multiply
that times .0226 is .0025584 s. That is about 2.55 m/S. The 1/X of that
number is 390.87 ohms, not 44.2 ohms.

I have no idea where your answer of 1 / 2.55 m/s = 44.2 ohms came from,
since 1/ 2.55 m/s is 392.2 ohms.

So the correct par R answer is 390.87 ohms using your figures (it is
really 386.89, but close enough).

>Using Wes' suggestion, 44.2 ohms in parallel with 50 ohms =23.5 ohms.
>Q=R/X = 23.5/44.64 = 0.52.

Woops again Rich, there must have been a parasitic oscillation in your
calculator, hi.

1/R = 1/50 plus 1/390.87 = 44.329 ohms    44.329 / 44.64 = .993

so Q = .993

By your method Q=.993 with nichrome, not a big drop from 1.14 with a
LOSSLESS suppressor inductor. This is of course different than my posted
value from rounding.

>It looks like the relatively small amount of ESR in the nichrome Ls made
>the VHF parasitic-oscillation suppressor's  VHF-Q decrease from 1.14 to
>0.54.

Even if I approximate it a 5 ohm series resistance change from a 50 ohm
suppressor is only 10%. 10% of 1.14 is .114. 1.14 minus .114 is about
1.026. The equiv series inductance also changes slightly so the Q change
will be a little more than that. With my toes and fingers and common sense
I get Q about 1 with the added resistance.

Adding nichrome lowers the HF Q, slightly reducing effects of excessive
drive, exciter transcients, and improper tuning. It does NOTHING for VHF
stability.

73 Tom


From [e-mail] Sat Dec 21 13:26:17 1996
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From: Andy Heninger <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: Thu, 12 Dec 1996 23:16:03 -0800
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R. L. Measures wrote:
>
> Yet another complication, is that a "low VHF-Q suppressor retrofit
> kit" consists of more than a lossier Ls/Rs suppressor.  Virtually all
> silver and copper conductors in the amplifier's  anode resonant circuit
> (longer that about an inch) are replaced with ni-cr-fe double-wire
> conductors, spaced about 1cm apart.  Since one of these wires is longer
> than the other, a staggered VHF resonance is created, like that from a VHF
> suppressor.  Thus, virtually all conductors between the anode and the tune
> capacitor become more resistive to the flow of VHF currents.  .  This in
> turn reduces the VHF voltage gain of the amplifier tube.  The before and
> after difference in the anode resonance dip is readily observeable on a
> dipmeter.
>

Rich,

Maybe its time to ditch these interminable Q calculations, and actually
meaaure the VHF response of an amplifier with and without your
suppressors.
It shouldn't be that hard to hack a VHF input circuit onto an HF amp,
drive it with some low-level VHF source, and see what shows up at the
anode.

The purpose of theory, after all, is to model reality.  It's
time for a reality check.

While you are at it, you could also check on what fraction of the total
anode VHF voltage appears at the HF tuning cap and band switch.
Conventional
wisdom says not much; you say enough to be a source of failures.

The best way to have your claims taken seriously is to demonstrate the
existance of the proposed effects in some repeatable, analyzable way.

  -- Andy Heninger   WB6MPT  [e-mail]


From [e-mail] Sat Dec 21 13:26:18 1996
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From: [e-mail] (R. L. Measures )
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: Fri, 13 Dec 1996 10:29:26 -0800
Organization: Internet Access of Ventura County
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In article <[e-mail]>, [e-mail] wrote:

> R. L. Measures wrote:
> >
snip

> Rich,
>
> Maybe its time to ditch these interminable Q calculations, and actually
> meaaure the VHF response of an amplifier with and without your
> suppressors.

Wes Stewart said he is going to make some Q measurements with his 250MHz Q
meter.

> It shouldn't be that hard to hack a VHF input circuit onto an HF amp,
> drive it with some low-level VHF source, and see what shows up at the
> anode. The purpose of theory, after all, is to model reality.  It's
> time for a reality check.
>
How could we be sure that the measurement apparatus did not alter the
nature of the input and output circuitry?

> While you are at it, you could also check on what fraction of the total
> anode VHF voltage appears at the HF tuning cap and band switch.
> Conventional wisdom says not much; you say enough to be a source of failures
.

Conventional wisdom says that such failures are not possible.  //
Measuring the phenomenon may be more complicated than it looks, Andy.
Although minor levels of VHF energy can be observed at the anode with a
spectrum analyzer whenever the anode current changes, however,  when full
blown regeration occurs---i.e., the kind that produces arcing--- it appears
to be quite brief.  //  I have no doubt that the mysterious arcing is
related to the presence of regenerative VHF energy.  Consider an amplifier
which produces a maximum of 2700v peak at the tune capacitor, whose
bandswtich has a measured holdoff V capability of over 5500v.  If the
bandswitch arcs when the amplifier is not being tuned up, and/or is not
being overdriven, it seems likely that there was an anomaly during the arc.
.

> The best way to have your claims taken seriously is to demonstrate the
> existance of the proposed effects in some repeatable, analyzable way.
>
I have little hope that Mr. Rauch will ever take anything seriously if it
contradicts his dicta.  For example, when confronted with the results of
his own problem on the magnitude of VHF currents in an Ls/Rs VHF parasitic
suppressor, he summarily dismissed the results.  //  Consider the long and
winding road over the question of whether or not the AL-1500 uses a VHF
suppressor. //  Consider the case of Buzz Miklos, who used to work at
Eimac-Varian's Salt Lake City plant.  Mr. Rauch told us "that Mr. Miklos
was indeed R+D engineering manager for Varian".  However, when I telephoned
the personnel  department at the Salt Lake City plant, they told me that
Mr. Joseph 'Buzz' Miklos' title was "Engineer B"---and they assured me that
Mr. Miklos was NOT the R and D Engineering Manager.

--
--Rich-- ag6k, 805-386-3734


From [e-mail] Sat Dec 21 13:26:21 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: 14 Dec 1996 02:47:01 GMT
Organization: AOL http://www.aol.com
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In article <[e-mail]>,
[e-mail] (R. L. Measures ) writes:

>
>Wes Stewart said he is going to make some Q measurements with his 250MHz
Q
>meter.
>
>

Thought he was makings measurements on a Boonton 250 RX meter?
I have a vintage Boonton VHF Q meter, but I don't think it is of much
use for very low Q values.

I have a  question.  Probably shouldn't ask it, but I am going to
anyways.  What would happen if the parasitic suppressor was made
to be parallel resonant at or near the parasitic frequency.  I know it
would require an additional capacitor -- but I was wondering if this
wouldn't solve a few problems.  First the coil size could be reduced,
limiting  losses at 28 MHz.  Secondly, there would
be little doubt that most of the VHF currents are flowing through the
resistor.

Another factor I have not seen discussed is how the suppressor
resistor appears  at VHF.  There has been a lot of complex math thrown
about,  but all the calculations to date ASSUME that the resistor has no
inductance or capacitance and has no reactive components .  Anyone
who has tried measuring a resistor on an RX bridge -- even at HF --
knows how imperfect most resistors are.

The most interesting "suppressors" I have seen were used by Hallicrafters
in an AB1 amp using a pair of 4CX350 tubes.  They used  wire wound
resistors, with a heavy wire coils wrapped around them!

Pete




From [e-mail] Sat Dec 21 13:26:23 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: 14 Dec 1996 14:30:55 GMT
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In article <[e-mail]>,
[e-mail] writes:

>
>I have a  question.  Probably shouldn't ask it, but I am going to
>anyways.  What would happen if the parasitic suppressor was made
>to be parallel resonant at or near the parasitic frequency.  I know it
>would require an additional capacitor -- but I was wondering if this
>wouldn't solve a few problems.  First the coil size could be reduced,
>limiting  losses at 28 MHz.  Secondly, there would
>be little doubt that most of the VHF currents are flowing through the
>resistor.
>
>

Hi Pete,

I covered this early on at the very beginning of this thread. The postings
have probably expired by now.

The choices are a series resonant supressor path ro ground, or a parallel
resonant suppressor path in seriies wth the connection to the low VHF Z
tuning capacitor.

There are a few commercial amplifiers that use just such a suppressor.

As to your comments on resistors, the AL-1200 uses a 100 ohm metal film
inductive resistor in series with a small siver mica capacitor that series
resonates the resistor at the VHF self-oscillation frequency of 100 MHz.
The capacitor reduces ten meter current through the suppressor resistor,
and increases VHF current through the resistor.

PA's use different methods of suppression depending on the requirements.

73 Tom


From [e-mail] Sat Dec 21 13:26:24 1996
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From: "Will, KN6DV" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: 14 Dec 1996 16:06:23 GMT
Organization: KN6DV
Lines: 43
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[e-mail] wrote in article
<[e-mail]>...
> In article <[e-mail]>,
> [e-mail] writes:
>
> >
> >I have a  question.  Probably shouldn't ask it, but I am going to
> >
******SNIP
> >
> >
>
> Hi Pete,
>
> I covered this early on at the very beginning of this thread. The
postings
> have probably expired by now.

There is a archive on my web page with all postings in it.
      --
http://www.av.qnet.com/~kn6dv

> The choices are a series resonant supressor path ro ground, or a parallel
> resonant suppressor path in seriies wth the connection to the low VHF Z
> tuning capacitor.
>
> There are a few commercial amplifiers that use just such a suppressor.
>
> As to your comments on resistors, the AL-1200 uses a 100 ohm metal film
> inductive resistor in series with a small siver mica capacitor that
series
> resonates the resistor at the VHF self-oscillation frequency of 100 MHz.
> The capacitor reduces ten meter current through the suppressor resistor,
> and increases VHF current through the resistor.
>
> PA's use different methods of suppression depending on the requirements.
>
> 73 Tom
>


From [e-mail] Sat Dec 21 13:26:25 1996
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From: [e-mail] (R. L. Measures )
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: Sat, 14 Dec 1996 09:30:45 -0800
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In article <[e-mail]>,
[e-mail] wrote:

snip
> I have a  question.  Probably shouldn't ask it, but I am going to
> anyways.  What would happen if the parasitic suppressor was made
> to be parallel resonant at or near the parasitic frequency.

Ç  I'm not sure that resonance would help resist the flow of  VHF current.

>I know it
> would require an additional capacitor -- but I was wondering if this
> wouldn't solve a few problems.  First the coil size could be reduced,
> limiting  losses at 28 MHz.

Ç The added loss at 28MHz from a low Q suppressor is about 1%.  One would
need a Bird digital wattmeter to see such a  difference.  Much smoke has
been raised about the deleterious effects of low  Q suppressors on 10m
harmonic suppression.  I have not observed this to be the case.  So far,
none of my 4500+ customers have reported such a thing.  I do not see how it
is possible to design a VHF suppressor that does not have some loss at
28MHz.

>Secondly, there would
> be little doubt that most of the VHF currents are flowing through the
> resistor.

Ç As the inductance of Ls is reduced, more current flows through Ls and
less current flows through Rs.  (see 3/89 QST magazine)

> Another factor I have not seen discussed is how the suppressor
> resistor appears  at VHF.  There has been a lot of complex math thrown
> about,  but all the calculations to date ASSUME that the resistor has no
> inductance or capacitance and has no reactive components .  Anyone
> who has tried measuring a resistor on an RX bridge -- even at HF --
> knows how imperfect most resistors are.

Ç  True.  Some are more imperfect than others.   When Wes Stewart reports
his measurements on the resistors we use in the suppressor retrofit kits,
we will know for sure. //   Cesiwid Co. is supposedly sending me some
samples of 100 ohm 20w resistors which have under ten nanoHenry L.

> The most interesting "suppressors" I have seen were used by Hallicrafters
> in an AB1 amp using a pair of 4CX350 tubes.  They used  wire wound
> resistors, with a heavy wire coils wrapped around them!
>
Ç  The idea is interesting.  However, if the Ls part of the VHF suppressor
is a wire wound resistor, then why not connect a lower-L MOF resistor in
parallel with it to enhance the desired stagger-tuning effect?  This would
increase series-R, and that would decrease the parallel equivalent VHF load
R presented to the anode, which in turn would decrease the VHF voltage
gain, thereby increasing VHF stability.

--
--Rich-- ag6k, 805-386-3734


From [e-mail] Sat Dec 21 13:26:26 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: 15 Dec 1996 02:49:41 GMT
Organization: AOL http://www.aol.com
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In article <[e-mail]>,
[e-mail] writes:

>
>I have no more time for arguments about the value of a GDO or time to
>correct math or circuit analysis errors. I feel just as bad as you do
>about the way you were treated, someone should have had sense enough to
>look this stuff over BEFORE printing it. That was not your fault at all.
>
>Good luck in the new year.
>
>73 Tom
>
>

Thanks Tom.

I can sense your resolve in ending this thread.

Let me say I have followed it with anticipation. Everyone helped me
understand
the ol' amps a lot better. The complete discussion have been archived and
I will get the data and keep it for future reference.

Although the thread was started with a degree of animosity and not
intended to be of great value, it most certainly has been to me. Rich
should be thanked for his
presence to keep the thread alive. You too. Thanks Rich...and others who
made technical comments.

Thanks again...............................

Carl
N9EFJ
The2x4


From [e-mail] Sat Dec 21 13:26:27 1996
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From: [e-mail] (K1BQT)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: 16 Dec 1996 00:50:26 GMT
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Hi Rich--

As far as I have been able to discern from this thread--and from past
media wars--is that there is no conspiricy here.  I suspect Dick Erhorn,
Tom Rauch, Dick Frey, and those various "demon" engineers at Eimac and
elsewhere who are "attempting to hide the truth from the amateur public"
are nothing more than a wishful figment of your imagination.  The fact is,
you have written extensively--and you currently have a web page--where you
make money selling a product that is based upon the premise that others in
the industry are stupid and incompetent.  That's a pretty big burden of
proof to carry, Rich.  How's it working out??


Rick  K1BQT


From [e-mail] Sat Dec 21 13:26:28 1996
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From: [e-mail] (Phil Clements)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: 16 Dec 1996 05:47:52 GMT
Organization: Your Organization
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In article <[e-mail]>, [e-mail] say
s:
>
>In article <[e-mail]>,
>[e-mail] writes:
>
>>
>>I have no more time for arguments about the value of a GDO or time to
>>correct math or circuit analysis errors. I feel just as bad as you do
>>about the way you were treated, someone should have had sense enough to
>>look this stuff over BEFORE printing it. That was not your fault at all.
>>
>>Good luck in the new year.
>>
>>73 Tom
>>
>>
>
>Thanks Tom.
>
>I can sense your resolve in ending this thread.
>
> snip.....

 It is unfortunate that W8JI's article 19961213151600 that 2X4 is
 responding to above was pulled from this news group before I got
 to read it! Perhaps 2X4 will be kind enough to repost it so we can
 all "sense [W8JI's] resolve in ending this thread." It is like
 reading a novel only to find out someone tore out the last page!

 Thanks,
 Phil K5PC


From [e-mail] Sat Dec 21 13:26:29 1996
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From: [e-mail] (R. L. Measures )
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: Mon, 16 Dec 1996 09:47:03 -0800
Organization: Internet Access of Ventura County
Lines: 29
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References: <[e-mail]> <[e-mail]> <592nq8$[e-mail]>
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In article <592nq8$[e-mail]>, [e-mail] (Phil
Clements) wrote:

> In article <[e-mail]>,
[e-mail] says:
> >
> >In article <[e-mail]>,
> >[e-mail] writes:
> >
> >>
> >>I have no more time for arguments .........snip......

>  It is unfortunate that W8JI's article 19961213151600 that 2X4 is
>  responding to above was pulled from this news group before I got
>  to read it! Perhaps 2X4 will be kind enough to repost it so we can
>  all "sense [W8JI's] resolve in ending this thread." It is like
>  reading a novel only to find out someone tore out the last page!
> .

Untruthfulness is probably the surest way to loose public support---and
the fastest way to ruin one's chances of winning a public debate.

   It's unfortunate that Mr. Rauch bailed out, Phil.  This morning I got
an e-mail from Rick  KC0HH,  who has had two bandswitches mysteriously
burn up in his Ameritron AL-80A amplifier.  Rick said:  " I am really
tired of spending all day Sunday re-installing a band switch...."

--
--Rich-- ag6k, 805-386-3734


From [e-mail] Sat Dec 21 13:26:31 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: 17 Dec 1996 04:03:49 GMT
Organization: AOL http://www.aol.com
Lines: 62
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In article <[e-mail]>,
[e-mail] (R. L. Measures ) writes these words of fine
wisdom:

**************************************************************************
*********
>Untruthfulness is probably the surest way to loose public support---and
>the fastest way to ruin one's chances of winning a public debate.

**************************************************************************
***********

In article <[e-mail]
(R. L. Measures) wrote:

>This afternoon I received a telephone call from Marvin Born, KF8XU, who
is repairing >a AL-1500 for a friend. Marvin asked me if we still sell
parasitic suppressor retrofit >kits. I said yes.
>I asked Marvin why he felt he needed a kit. He said that the AL-1500 had
an >intermittent VHF oscillation he could see on a spectrum analyzer, as
well as see on >Tektronix 454 oscilloscope.

Richard, I just got off the phone with Marvin Born.

Marvin said he clearly told you he measured the parasitic in a 3CX3000
amplifier, NOT in the "1500". Not only that, Marvin said the "1500" he is
repairing uses a pair of tubes. It has a different tube chassis and
transformer (more voltage) than the real AL-1500.

As we talked, things started to click. I asked him if the owner of the PA
was Jim Hurt, KC8MK. Indeed it was.

KC8MK was a saleman that used to call on Prime Instruments, and operated
160 meter contests at my South Amherst Ohio QTH. I gave Jim a scrap
prototype chassis (less most major components) in 1985. He wanted to build
a pair of 8877's and had no sheet metal equipment. That amp got him
started on his project.

Rest assured, the ONLY thing in that PA that is factory is basically the
cabinet!!!! Even the tube chassis and the transformers are non-factory.

Marvin insists you VERY clearly knew the 1500 was heavily modified without
the best craftmanship with two 8877 tubes in parallel. He also was
absolutely sure you knew the parasitics were measured on a 3CX3000, NOT on
this PA. (It isn't even running yet)

Richard, it would be better if you stuck to technical issues.

If people read back and count the times you've slammed others, including
people like Dick Erhorn, Mark Wilson, Tom Rauch, Fred Telewski, Reid
Brandon, Bill Clemow, John Fakan, Steven Katz, Buzz Miklos, and Bill Orr,
they might just think you don't trust anyone. The list also includes
organizations like the ARRL, ETO, Henry, Kenwood, Ten-Tec, Varian, NASA,
and even Ford!

Ford, NASA, Nixon... they all have nothing to do with parasitics. Neither
does your dream conversation with Marvin about a measurement he never even
made. AL-1500 indeed, and you KNEW better!

And you accuse me of deception and smoke? Check the mirror, Rich.

Tom


From [e-mail] Sat Dec 21 13:26:32 1996
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From: [e-mail] (K1BQT)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: 17 Dec 1996 15:45:54 GMT
Organization: AOL http://www.aol.com
Lines: 42
Message-ID: <[e-mail]>
References: <[e-mail]>
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X-Admin: [e-mail]

Hi Rich--

In your last post, you wrote:

"Is the ARRL independant of advertisers?  The ARRL lab technician who
tested the AL-1200 amplifier told me that he observed what appeared to be
intermittent VHF parasitic-related arcing during lab testing.  This
information did not appear in the QST product review."

The League has reviewed several pieces of my equipment, and I can
vouche--first hand--that they will not, under ANY circumstance, withold
reporting an anomoly in performance in a review--no matter WHO the vendor
is or how much they spend annually on advertising.  In fact, even when the
observation is misinterpreted by the reviewer or not relevent to normal
operation, they'll print it anyway!  So I cannot accept your claim as
having any credibility whatsoever.  Also, I doubt the lab tech would
independently arrive at a conclusion that arcing was caused by VHF
parsitics--without your suggesting it to him in some way.  I talk to these
people on a regualr basis, and they are usually very careful not to make
presumptions.

Linear amplifiers are not my area of expertise, which is why I have found
this thead to be particularly interesting and instructional.  The only
reason I am intervening at all is because, from time to time, the dialog
jumps off a technical track and into Rickie Lake style bickering over who
did what and who said what.  For me, that type of interchange serves no
useful function except to deflect debate away from the real issue at hand.
 Wouldn't it be better for your VHF parasitic theory to stand or fall on
the basis of its technical merit rather than remain muddled up in a mass
of foolish charges and counter-charges?

Having registered my vote for sticking to technical issues, I'll get out
of the way and let the debate continue.

-- Rick K1BQT









From [e-mail] Sat Dec 21 13:26:33 1996
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From: [e-mail] (R. L. Measures )
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: Tue, 17 Dec 1996 10:04:51 -0800
Organization: Internet Access of Ventura County
Lines: 46
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
NNTP-Posting-Host: port12.vcnet.com

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

> In article <[e-mail]>,
> [e-mail] (R.L. Measures ) writes:
snip...

> Hi Richard,
>
> I'm afraid your statement about Mr. Miklos is not correct. ...snip...

Nah.  The cat's out of the bag, Tom Rauch.  You were caught red-handed,
and you are telling another one to cover it up.

> I was simply going to ignore it. It does
> little good for us to argue about what you "heard" or what I head, it
> means nothing to anyone else.

It means C. Tom Rauch, Jr. did not tell the truth.  To me, such a
shenanigan means more than 'nothing'.

> Two things about your claim does not make sense.
>
> First, the personel department at Varian would not release employment
> information to some voice over the phone without a signed release by that
> employee.

 Yeah, that's what you were banking on, but it didn't work    I phoned
Eimac's Salt Lake City division at  801-972-5000.  I explained what has
been taking place in this debate.  I said that certain claims about Mr.
Miklos were being made in his absence, and that I would like to verify
these claims.  We are hardly talking about national defense secrets.

Under normal circumstances, Tom, you might have gotten away with it.
However, there were some unseen factors at work that may have upset your
apple cart.

 In my family, there are two pathological liars, so I am familiar with how
such individuals operate.  Briefly, EVERYTHING these indivuals say needs
to be investigated.  When one lie gets exposed, they often tell another
lie to cover the previous lie, on and on.  .

I found out how you lost control of Ameritron to MFJ.

--
--Rich-- ag6k, 805-386-3734


From [e-mail] Sat Dec 21 13:26:34 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: 17 Dec 1996 07:32:44 GMT
Organization: AOL http://www.aol.com
Lines: 42
Message-ID: <[e-mail]>
References: <592nq8$[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]
X-Newsreader: AOL Offline Reader

In article <592nq8$[e-mail]>, [e-mail] (Phil
Clements) writes:

>>
>>In article <[e-mail]>,
>>[e-mail] writes:
>>
>>>
>>>I have no more time for arguments about the value of a GDO or time to
>>>correct math or circuit analysis errors. I feel just as bad as you do
>>>about the way you were treated, someone should have had sense enough to
>>>look this stuff over BEFORE printing it. That was not your fault at
all.
>>>
>>>Good luck in the new year.
>>>
>>>73 Tom
>>>
>>>
>>
>>Thanks Tom.
>>
>>I can sense your resolve in ending this thread.
>>
>> snip.....
>
> It is unfortunate that W8JI's article 19961213151600 that 2X4 is
> responding to above was pulled from this news group before I got
> to read it! Perhaps 2X4 will be kind enough to repost it so we can
> all "sense [W8JI's] resolve in ending this thread." It is like
> reading a novel only to find out someone tore out the last page!
>
> Thanks,
> Phil K5PC

I think that.. "I have no more time"... as seen above does not require any
more sensibility than observance of the written word.
I think the last page was repeated several times through out the thread.

Sorry you missed it...

Carl


From [e-mail] Sat Dec 21 13:26:36 1996
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From: "Tom C. Brown, Jr." <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: Tue, 17 Dec 1996 10:36:39 -0600
Organization: Madison Materials Company
Lines: 30
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
Reply-To: [e-mail]
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To: [e-mail]
CC: [e-mail]

[e-mail] wrote:
>
[Partial]


> Who at Varian gave you that information? Did you "record" that
> conversation?

This is beginning to sound like the opening exchange that we heard each
week on "The Prisoner" between No. 6 and No. 2.  ".....who is Number 1?
.....You....are Number 6....."

"Who at Varian gave you that information?"  ......  "Who is Mr. XXX?"

It just goes on and on....

You've got a lot of nerve to ask Rich for a name, when you have
catagorically refused to name the mysterious Mr. XXX.

And you really should stop accusing Rich of saying that the dissipation
rating of an 8877 grid is 500 watts.  That's not what he's said, Tom.
What he said was that it might take that kind of power to elevate an
8877 grid to the point of boiling gold in the instant of time it takes
to trash one of those tubes.  At least, that's the way I interpreted it.

And your denial of the possibility of cathode damage in some of these
scenarios is wrong, too.  Some of these cathodes are indeed pretty
vulnerable to certain types of damage.

73, Tom KJ5IE


From [e-mail] Sat Dec 21 13:26:37 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: 18 Dec 1996 18:15:09 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]
X-Newsreader: AOL Offline Reader

"Even a broken clock is right twice a day.."

Pete


From [e-mail] Sat Dec 21 13:26:38 1996
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From: [e-mail] (K1BQT)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: 18 Dec 1996 22:58:31 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]

Rich--

It appears you have lost interest in discussing technical matters and now
prefer the venue of personal attack.  If your technical arguments have as
much technical merit as you claim, why would you resort to a less
productive strategy such as this?

Rick  K1BQT






From [e-mail] Sat Dec 21 13:26:39 1996
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From: [e-mail] (R. L. Measures )
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: Wed, 18 Dec 1996 19:24:50 -0800
Organization: Internet Access of Ventura County
Lines: 36
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
NNTP-Posting-Host: port20.vcnet.com

In article <[e-mail]>, [e-mail]
(K1BQT) wrote:

> Rich--
>
> It appears you have lost interest in discussing technical matters and now
> prefer the venue of personal attack.  If your technical arguments have as
> much technical merit as you claim, why would you resort to a less
> productive strategy such as this?
>
> Rick  K1BQT

The diversion was necessitated by the discovery that one of debaters was
being somewht less than truthful.  IMO, prevarication has no place in a
scientific debate.  Do you have a diffent  opinion, Rick?

Did you see my reply of 16 December?   I raised some technical issue is
this reply to your post.  Have you lost interest in such things?

In case you missed it, here is an instant replay:
Are some amplifier manufacturers incompetent?  Consider the cut-and-dry
issue of filament voltage.  The rated filament voltage for a 3-500Z is
4.75v to 5.25v.  Eimac says that the emissive life of a thoriated tungsten
filament/cathode varies as E1/E2.^23.4.  If you bought a commercial 3-500Z
amplifier, Rick,  and you subsequently discovered that the filament
voltage at pins one and five on the tube sockets was 5.95v with an
electric-mains voltage of 240v, would you conclude that the amplifier was
competently-engineered?  (such fil-v reduces life to under 1 percent of
normal)   //  This is not a figment of anyone's imagination, Rick.   The
amplifier's manufacturer is Henry Radio Co.  Other manufacturers have the
same problem.  Do you think its okay to run 15V on a 3CX800A7 filament?

 Rick:  Do you think 48A of filament inrush current is ok for a 3-500Z?

--
--Rich-- ag6k, 805-386-3734


From [e-mail] Sat Dec 21 13:26:41 1996
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From: [e-mail] (R. L. Measures )
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: Thu, 19 Dec 1996 04:55:05 -0800
Organization: Internet Access of Ventura County
Lines: 34
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
NNTP-Posting-Host: port29.vcnet.com

In article <[e-mail]>, [e-mail]
(K1BQT) wrote:

> Rich--
>
> It appears you have lost interest in discussing technical matters ...snip...

Okay, Rick, back  to technical matters.

About 14 hours ago I received a telephone call from Jim, KA3JSO.  He
wanted to talk about designing suppressors for large amplifier tubes.  We
talked for over an hour.  During the course of the discussion, he told me
he once owned an AL-1500 amplifier.  As you may recall from a previous
post on this thread, the AL-1500 uses no VHF parasitic oscillation
suppressor device.  Jim told me that during the 12 month warranty period,
two 8877s failed suddenly.  After 8877 number three was installed, Jim
sold the amplifier as soon as possible.  Jim said that Ameritron told him
that the failures were caused by defective 8877s.  Jim told me that
K20JL/V31BB had an AL-1500, in which a number of 8877s suddenly failed
About 8 days ago, Marvin Born, KF8XU,  telephoned me.  He said he needed a
parasitic suppressor retrofit kit for an AL-1500 because the one he was
attempting to repair was producing intermittent VHF oscillations, as seen
a a Tek 454 scope.  Marvin said he could also see the intermittent VHF
oscillations on a spectrum analyzer.

With the exception of Ameritron, all manufacturers of 8877 amplifiers seem
to use a VHF parasitic oscillation suppressor device.  IMO, there must be
a reason.

Rick:  Do you feel that the relatively large number of 8877 failures in
AL-1500s is due to an 8877 manufacturing defect at Eimac?

--
--Rich-- ag6k, 805-386-3734


From [e-mail] Sat Dec 21 13:26:42 1996
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From: [e-mail] (Tom Bruhns)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: 19 Dec 1996 19:20:32 GMT
Organization: Hewlett Packard Corvallis Site
Lines: 39
Message-ID: <59c4i0$[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: hplsnb.lsid.hp.com
X-Newsreader: TIN [version 1.1 PL9.4]

R. L. Measures ([e-mail]) wrote the following piece
of ambiguity::

: Are some amplifier manufacturers incompetent?  Consider the cut-and-dry
: issue of filament voltage.  The rated filament voltage for a 3-500Z is
: 4.75v to 5.25v.  Eimac says that the emissive life of a thoriated tungsten
: filament/cathode varies as E1/E2.^23.4.  If you bought a commercial 3-500Z
: amplifier, Rick,  and you subsequently discovered that the filament
: voltage at pins one and five on the tube sockets was 5.95v with an
: electric-mains voltage of 240v, would you conclude that the amplifier was
: competently-engineered?

This leaves me with the following questions:

 -- Did you indeed measure 5.95 volts, or is that just part of a
    hypothetical question?
 -- Is that 5.95 volts a true RMS voltage or is it a voltage you read on a
    peak-sensing rms-calibrated meter?
 -- Is the meter accurately calibrated, and was it read accurately?
 -- Was the primary side wired for 200V, 220V or 240V when the measurement
    was made?
 -- Is the meter accurately calibrated, and was it read accurately? (240V
    side)
 -- Was the measurement made with a tube in the socket which provided the
    expected filament load current?
(-- Which Eimac was it that said that?)

Those may not be all the things that need to be better nailed down in
looking for an accurate answer to the questions posed.

Clearly some subset of all amplifier manufacturers are incompetent by
some measure.  (oops, sorry. ;-)  But then I suspect a much higher
percentage of posts to this group contain inaccuracies than the
percentage of commercial amplifier manufactureres which are incompetent.

--
Cheers,
Tom
[e-mail]


From [e-mail] Sat Dec 21 13:26:43 1996
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From: [e-mail] (R. L. Measures )
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: Thu, 19 Dec 1996 22:28:17 -0800
Organization: Internet Access of Ventura County
Lines: 55
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
NNTP-Posting-Host: port43.vcnet.com

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

> Richard claims a 100 watt exciter can not damage a 4 watt 3CX800 grid, or
> a 20 watt 8877 grid. That's a harmful and misleading claim.

Take a look at the photos in "Parasitics Revisited", in 9/90 and 10/90 QST
magazine, folks.  The cathode coating was stripped by overdrive, creating
a dead short from the grid to the cathode.  However, the gold plating on
the grid is undisturbed, and no gold melt-balls were seen through a
microscope.  Does HF overdrive cause the gold plating to
sputter/evaporate?   Tom Rauch says absolutely yes, but the photographs
say no.  What does Eimac say?   Eimac told me, both on the phone and in a
letter, that gold evaporation is caused by an "oscillation condition".
//  Take a guess whether or not Tom Rauch took me up on my offer to
dissect and photograph, for everyone here to see, a 3CX800A7 which Tom
says was ruined by overdrive?  If  you guessed that he did not take me on,
congratulations.  Apparently, Tom does not have the courage of his
convictions.  //  Next Question:  Rich:  Do you enjoy arguing with
schmucks?


> A 3-500Z has a saturated current of just over ten amperes.
>
Not according to Eimac.  Saturation begins around 1.3 amperes.  Does Tom
Rauch know better than Eimac?  Wait a minute.  We've been here before.  Am
I talking to a brick wall?

I think part of Mr. Rauch's problem is rooted in his reluctance to admit
mistakes.  Here's an example from an e-mail he sent me:
===============
Hi Rich,

I don't want to keep trashing you technically in front of people. Please
consider what you say before you post it. People will think you are an idiot
if you keep this stuff up.

Isn't there a way we can just end all this crap? I'd gladly agree your
nichrome isn't harmful, and even may be a good solution in some special
cases, if you'll just drop all the other idiotic suggestions.

Coming after me will get you nowhere, I've done this stuff for 25 years and
don't often make mistakes. You might catch me once or twice out of a few
dozen tries, but mostly these arguments will make you look dumb. Neither one
of us likes that.

Think about it please,
Tom
===============
Some differences between Tom and me:
I have doing this for 41 years, I have made plenty of mistakes, and I know
that good science does not involve lying.

--
--Rich-- ag6k, 805-386-3734


From [e-mail] Sat Dec 21 13:26:44 1996
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From: [e-mail] (K1BQT)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: 20 Dec 1996 04:06:46 GMT
Organization: AOL http://www.aol.com
Lines: 29
Message-ID: <[e-mail]>
References: <59c4i0$[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

Hi Rich--

In your post, you wrote: "Rick,  and you subsequently discovered that the
filament
: voltage at pins one and five on the tube sockets was 5.95v with an
: electric-mains voltage of 240v, would you conclude that the amplifier
was
: competently-engineered?"

I might do many things--including discussing the matter with the
manufacturer's customer service engineer before making assumptions about
the amplifier's "airworthiness" or condeming the designer's petigree.  A
problem such as this, if indeed the incident occurred exactly as you
represent, could just as easily be the consequence of a transformer
manufacturing problem--or a failure on the part of the owner to read the
manual.  And, even if the problem was "real", it may be due to
manufacturing substitutions or production changes the designing engineer
knew nothing about.  Your anecdote is provocative (as I'm sure you
intend), but I have no confidence that it is complete.  Like Paul Harvey,
I don't think I could even comment without hearing "the rest of the
story".

-- Rick  K1BQT








From [e-mail] Sat Dec 21 13:26:46 1996
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From: [e-mail] (R. L. Measures )
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: Thu, 19 Dec 1996 23:12:36 -0800
Organization: Internet Access of Ventura County
Lines: 35
Message-ID: <[e-mail]>
References: <59c4i0$[e-mail]> <[e-mail]>
NNTP-Posting-Host: port14.vcnet.com

In article <[e-mail]>, [e-mail]
(K1BQT) wrote:

> Hi Rich--
>
> In your post, you wrote: "Rick,  and you subsequently discovered that the
> filament
> : voltage at pins one and five on the tube sockets was 5.95v with an
> : electric-mains voltage of 240v, would you conclude that the amplifier
> was
> : competently-engineered?"
>
> I might do many things--including discussing the matter with the
> manufacturer's customer service engineer before making assumptions about
> the amplifier's "airworthiness" or condeming the designer's petigree.
........snip........
>
> -- Rick  K1BQT
>
It's apparently not a fluke.  More than one model is involved.  No way to
adjust the filament voltage is incorporated.

A while back, I got a phone call from a fellow who owns a Commander
3CX800A7 amplifier.  He told me that he had just measured 15 volts at the
heater pins on the tube sockets.  He asked me what I thought about it.  I
told him that 15v was greater than Eimac's maximum rated filament
voltage.   He phoned the manufacturer of the amplifier and discussed the
matter as you recommended, Rick.  He was told that 15 volts is perfectly
okay.

However, when 15 volts is applied to the 3CX800A7 heater, barium boils off
the cathode and redeposits on the grid, greatly shortening tube life.

--
--Rich-- ag6k, 805-386-3734


From [e-mail] Sat Dec 21 13:26:48 1996
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From: Andy Heninger <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: Fri, 20 Dec 1996 11:47:40 -0800
Organization: Best Internet Communications
Lines: 42
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]> <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: barbh.vip.best.com
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.0Gold (Win95; I)

R. L. Measures wrote:
>

> Take a look at the photos in "Parasitics Revisited", in 9/90 and 10/90 QST
> magazine, folks.  The cathode coating was stripped by overdrive, creating
> a dead short from the grid to the cathode.  However, the gold plating on
> the grid is undisturbed, and no gold melt-balls were seen through a
> microscope.  Does HF overdrive cause the gold plating to
> sputter/evaporate?   Tom Rauch says absolutely yes, but the photographs
> say no.  What does Eimac say?   Eimac told me, both on the phone and in a
> letter, that gold evaporation is caused by an "oscillation condition".
>

I have to say that none of the above makes sense at all to me.

First, there is no difference between a tube in an "oscillation
condition" and a non-oscillating amplifier, so far as the tube itself
and its ratings are concerned.  The external difference is the source of
the drive (or over-drive) - either from an external source or from
feedback - but the same level of drive is going to look the same to the
tube no matter where that drive came from.  Look in old transmitting
tube manuals and you will find operating conditions specified for "RF
Power Amplifier and Oscillator."  Archaic technology, but still valid.

Then there is the question of whether VHF overdrive is signficantly more
damaging to the tube than HF (or audio, or DC) overdrive.  In a tube
that is specified for use at full ratings into the lower UHF range, as
is the 3CX800A7 being discussed here, this seems unlikely.

When you say "The cathode coating was stripped by overdrive" do you mean
that the grid current was excessive or that the cathode  current was
excessive?

You have two specimens of trashed tubes, with different failure
mechanisms.  I don't see how you are able to associate the failures with
HF vs. VHF damage - it seems much more plausible that the grid was
damaged by excess grid dissipation (independently of frequency), and
that the cathode was damaged by excess cathode current, perhaps combined
with low filament voltage.


  -- Andy Heninger   WB6MPT


From [e-mail] Sat Dec 21 13:26:49 1996
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From: [e-mail] (Marijan Miletic)
Newsgroups: rec.radio.amateur.homebrew
Subject: Good source for amplifier tips
Date: 21 Dec 96 03:18:20 GMT
Organization: ucsd usenet gateway
Lines: 8
Message-ID: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]

The best thing I did to my SB-220 was increasing heather voltage to 4.95V from
4.65V caused by EU 220V mains.  Second mod was grounding grids directly and
now I can get 700 mA of tuned plate current.  Once againg, thanks Dick, K4XU
for pointing me to the EU weakness :-)
I am glad this debate takes more sensible direction with K1BQT, N7WS and other
s
giving support to W8JI technical claims against Hollywood magic ( I might be
influenced by "Escape from L.A." I saw last night :-).
Merry Xmass & HNY & 73 de Mario, S56A, N1YU.


From [e-mail] Sat Dec 21 13:26:50 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: 20 Dec 1996 13:11:07 GMT
Organization: AOL http://www.aol.com
Lines: 66
Message-ID: <[e-mail]>
References: <59c4i0$[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]
X-Newsreader: AOL Offline Reader

In article <59c4i0$[e-mail]>, [e-mail] (Tom Bruhns)
writes:

>
> -- Did you indeed measure 5.95 volts, or is that just part of a
>    hypothetical question?
> -- Is that 5.95 volts a true RMS voltage or is it a voltage you read on
a
>    peak-sensing rms-calibrated meter?
> -- Is the meter accurately calibrated, and was it read accurately?
> -- Was the primary side wired for 200V, 220V or 240V when the
measurement
>    was made?
> -- Is the meter accurately calibrated, and was it read accurately? (240V
>    side)
> -- Was the measurement made with a tube in the socket which provided the
>    expected filament load current?
>(-- Which Eimac was it that said that?)
>
>
Hi Tom,

I agree with all your points.

I'd like to add an area I consider of major concern to the list. In spite
of all the free-flowing "carte blanche" criticism of everybody else in the
world, technical descriptions of how to measure things are almost totally
missing. The "helpful" suggestions are based on the author's view
"everyone else is incompetent and a liar".

Important data is often left out of the "suggested improvements".

Over the past year I have seen three PA's with metal oxide cathode tubes
(two 8877's, one pair of 3CX800A7) ruined because someone reduced filament
voltage to "improve" tube life. Unlike the "intermittent parasitics"
claim, this problem is repeatable and directly traceable to a
modification.

Briefly, while reducing cathode temperature does improve emission life it
pushes the tube closer to emission saturation. This has two deleterious
efffects.

1.) In metal oxide cathode tubes it increases the required warm up time as
well as lowers the peak emission capability. If the user pushes the tube
current (on peaks, not on the current the panel meter indicates) to this
limit, the cathode suffers slow irreversible deterioration. This causes
unrecoverable loss of emission.

2.) In a thoriated tunsten tube reduced filament voltage does not decrease
tube life (the tube is not harmed when the catode is operated at its' peak
emission capability). Warm up time is also inconsequential. But reduced
filament voltage does decrease linearity and increase IMD products long
before a reduction in power is noted.

It's best to run all amateur service tubes within the range specified,
unless the user knows exactly what to do and how to measure it. If it were
my PA, and Eimac gave an operating range of 4.8 to 5.2 volts, I'd be sure
the voltage never went outside that range. I'd measure voltage at the pins
with a good true-RMS averaging meter.

If I had a tube running at 1/4 its rating, as BC stations do, I would
reduce voltage below the recommended values (while being very careful to
not go too close to the edge of emission). If I was using the tube at its
published rating, I'd run it at the rated voltage.

73 Tom


From [e-mail] Sat Dec 21 13:26:52 1996
Path: news1.epix.net!news3.epix.net!uunet!in3.uu.net!205.228.248.26!news.vcnet.com!port14.vcnet.com!user
From: [e-mail] (R. L. Measures )
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: Thu, 19 Dec 1996 23:38:13 -0800
Organization: Internet Access of Ventura County
Lines: 40
Message-ID: <[e-mail]>
References: <[e-mail]> <59c4i0$[e-mail]>
NNTP-Posting-Host: port14.vcnet.com

In article <59c4i0$[e-mail]>, [e-mail] (Tom Bruhns) wrote
:

> R. L. Measures ([e-mail]) wrote the following piece
> of ambiguity::
>
> : Are some amplifier manufacturers incompetent?  Consider the cut-and-dry
> : issue of filament voltage.  The rated filament voltage for a 3-500Z is
> : 4.75v to 5.25v.  Eimac says that the emissive life of a thoriated tungsten
> : filament/cathode varies as E1/E2.^23.4.  If you bought a commercial 3-500Z
> : amplifier, Rick,  and you subsequently discovered that the filament
> : voltage at pins one and five on the tube sockets was 5.95v with an
> : electric-mains voltage of 240v, would you conclude that the amplifier was
> : competently-engineered?
>
> This leaves me with the following questions:
>
>  -- Did you indeed measure 5.95 volts, or is that just part of a
>     hypothetical question?

It was not a hypothetical question.  The first time I worked on one of
these amplifiers, I noticed that 3-500Z filament was so bright I could
read a newspaper with the light from it.  This was no fluke, Tom.  At the
time, the line voltage measured 240v with my John Fluke DMM.

snip......

> Clearly some subset of all amplifier manufacturers are incompetent by
> some measure.  (oops, sorry. ;-)  But then I suspect a much higher
> percentage of posts to this group contain inaccuracies than the
> percentage of commercial amplifier manufactureres which are incompetent.
>
You are only guessing until YOU make the measurements, Tom.  I made the
measurements.  I wrote about them in "The Nearly Perfect Amplifier" in the
January 1994 issue of QST magazine.

Have you noticed that QST NEVER measures filament voltage, and NEVER
measures filament inrush current in amplifier product reviews.

--
--Rich-- ag6k, 805-386-3734


From [e-mail] Sat Dec 21 13:26:53 1996
Path: news1.epix.net!news3.epix.net!uunet!in2.uu.net!205.228.248.26!news.vcnet.com!port1.vcnet.com!user
From: [e-mail] (R. L. Measures )
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: Sat, 21 Dec 1996 02:50:29 -0800
Organization: Internet Access of Ventura County
Lines: 21
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: port1.vcnet.com

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

> The best thing I did to my SB-220 was increasing heather voltage to 4.95V fr
om
> 4.65V caused by EU 220V mains.  Second mod was grounding grids directly and
> now I can get 700 mA of tuned plate current.  Once againg, thanks Dick, K4XU

> for pointing me to the EU weakness :-)
> I am glad this debate takes more sensible direction with K1BQT, N7WS and
others
> giving support to W8JI technical claims against Hollywood magic ( I might be
> influenced by "Escape from L.A." I saw last night :-).
> Merry Xmass & HNY & 73 de Mario, S56A, N1YU.

The only magic I have seen around here lately is the way people who no
longer work at Eimac can magicly be promoted and demoted.  For instance,
the Chief Specifictions Engineer, Power Grid Division got demoted to
letter writer guy.  An Engineer B got promoted to 'R+D engineering
manager' (whatever that is).  Both actions took place years after they
left Eimac.

--
--Rich-- ag6k, 805-386-3734


From [e-mail] Sat Dec 21 13:26:53 1996
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From: [e-mail] (Wexelbaum)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Ham-Homebrew Digest V96 #560
Date: 20 Dec 96 15:47:04 GMT
Organization: ucsd usenet gateway
Lines: 4
Message-ID: <Pine.SV4.3.92.961220104503.13922A-100000@bookworm>
References: <[e-mail]>
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]

Pyramid clubs are not legal and do not belong here. They should certainly
not be encouraged by intellegent hams or computer buffs.
Vy 73, Bob W2ILP



From [e-mail] Sat Dec 21 13:26:54 1996
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From: [e-mail] (Thomas Miller)
Newsgroups: rec.radio.amateur.homebrew
Subject: HAMS AND HALE-BOPP
Date: Thu, 12 Dec 1996 01:38:37 GMT
Organization: infocom, inc.
Lines: 13
Message-ID: <58nr08$[e-mail]>
NNTP-Posting-Host: tally6.infocom.com
X-Newsreader: Forte Free Agent 1.0.82

Recently on the Art Bell show, Art and Whitley Strieber discussed the
possibility of amateur astronomers and amateur radio operators
conducting a project to monitor the Hale-Bopp comet.  I've devoted a
page on my web site THE MARTIAN ARCHIVES to the comet, and have posted
an article with "brainstorming" ideas on modifying and/or building
equipment for the project.  Any suggestions will be appriciated!  The
URL is:
                   http://www.infocom.com/~thomil/

-Thomas M. Miller (Mike)
  WA8YKN




From [e-mail] Sat Dec 21 13:26:55 1996
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From: [e-mail](Phillip Littlfield)
Newsgroups: rec.radio.amateur.homebrew
Subject: help  sb-101 switch
Date: 13 Dec 1996 12:39:32 GMT
Organization: Netcom
Lines: 4
Message-ID: <58riq4$[e-mail]>
NNTP-Posting-Host: dal-tx2-60.ix.netcom.com
X-NETCOM-Date: Fri Dec 13  6:39:32 AM CST 1996

    Can anyone tell me where to get the power / function switch for a
heathkit sb-101 xceiver. Any help would be great!!

    73 kb5yia (Phillip)


From [e-mail] Sat Dec 21 13:26:57 1996
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From: [e-mail] (Stephen Muther)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Help requested in receiving 92 KHz on FM radio
Date: 12 Dec 1996 13:07:21 -0800
Organization: BEST Internet Communications
Lines: 47
Message-ID: <58ps69$[e-mail]>
References: <58mljp$[e-mail]>
NNTP-Posting-Host: shellx.best.com

In article <58mljp$[e-mail]>,
-A.KACHHY <[e-mail]> wrote:
>Hello
>
>I recently bought a radio to listen to an ethnic radio broadcast
>in the NYC area. The broadcast is at 92KHz freq.
>
>The radio is a regular AM/FM radio converted to receive this freq. on the
>FM dial around the 92 Mhz mark.
>
>I wonder if anyone can tell me how this can be done, hopefully inexpensivly.
>The reason I want to do it myself is to have more radios of this type
>without paying a lot of money for (2 times) for each radio.
>
>Thanks in advance.
>
>Avinash Kachhy
>
>
>
>--
>Avinash Kachhy
>[e-mail]

Since no broadcasting of the type you mention is permitted in the
US on 92KHz, I can only assume that what you are talking about is
an FM broadcast receiver with a built in SCA (subcarrier)
demodulator.

SCA is a fm modulated subcarrier (typically at 67KHz but can
be higher) which rides on the baseband of a conventional FM
broadcast station.  This is similar to the SAP channel on
modern televisions. You would need to build an SCA demodulator
and retrofit a standard FM receiver with it.  You can make your
own using an NE565 IC from Philips (National also has something
similar but I don't remember the part number).  Also Ramsey
Electronics sells a kit.  Either method requires a reasonably
good understanding of electronics since you will have to
modify the original FM receiver, usually with no schematic.
You would need to consider the time and expertise involved
with the cost of the "special" receiver.


Good Luck

Steve M.  WF6R



From [e-mail] Sat Dec 21 13:26:58 1996
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From: [e-mail] (-A.KACHHY)
Newsgroups: rec.radio.amateur.homebrew
Subject: Help requested in receiving 92 KHz on FM radio
Date: 11 Dec 1996 15:56:41 GMT
Organization: AT&T
Lines: 21
Message-ID: <58mljp$[e-mail]>
NNTP-Posting-Host: hogpb.ho.att.com

Hello

I recently bought a radio to listen to an ethnic radio broadcast
in the NYC area. The broadcast is at 92KHz freq.

The radio is a regular AM/FM radio converted to receive this freq. on the
FM dial around the 92 Mhz mark.

I wonder if anyone can tell me how this can be done, hopefully inexpensivly.
The reason I want to do it myself is to have more radios of this type
without paying a lot of money for (2 times) for each radio.

Thanks in advance.

Avinash Kachhy



--
Avinash Kachhy
[e-mail]


From [e-mail] Sat Dec 21 13:26:59 1996
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From: Francis Lee <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Home brew TNC
Date: Tue, 17 Dec 1996 03:15:44 +0800
Organization: Asia On-Line Limited, Hong Kong.
Lines: 5
Message-ID: <[e-mail]>
Reply-To: [e-mail]
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X-Mailer: Mozilla 3.0Gold (Win95; I)

Does it possible make a home brew TNC (not Baycom)? If yes, where can
find the circuit ?
Rgds

Lee


From [e-mail] Sat Dec 21 13:27:00 1996
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From: [e-mail] (Bob Berlyn)
Newsgroups: rec.radio.amateur.homebrew
Subject: HomeBrew Parts
Date: 15 Dec 1996 15:12:33 GMT
Organization: AOL http://www.aol.com
Lines: 9
Message-ID: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

QRP/ HOMEBREWERS/ ELECTRONIC EXPERIMENTERS:

Toroids/Transistors/IC's/Small Parts /Kits  Great prices, quick shipment.
For catalog SASE to: HB Electronics 43 Rector St. E.Greenwich, RI
02818-3312
or see HTTP://www.Businesson.com/HAMPARTS  or E-MAIL:
[e-mail]




From [e-mail] Sat Dec 21 13:27:00 1996
Newsgroups: rec.radio.amateur.homebrew
Subject: How can I dye plastic enclosures?
From: [e-mail] (John C. Dillon)
X-Newsreader: WinVN 0.99.5
MIME-Version: 1.0
Content-Type: Text/Plain; charset=ISO-8859-1
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Message-ID: <[e-mail]>
Date: 17 Dec 96 00:42:51 GMT
Lines: 8
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I found some inexpensive plastic enclosures for my electronic
widgets. Price, fit and form is perfect.  Color is anything but.
These are bright yellow, and I need to dye them olive drab or
even black. I dyed one in RIT black dye for an hour and got
reasonable results (dark teal) but kinda splotchy. Is there
a better dye for high density polyethelene?
Thanks, John  WA3RNC



From [e-mail] Sat Dec 21 13:27:02 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!news.bbnplanet.com!su-news-hub1.bbnplanet.com!arclight.uoregon.edu!newsfeed.direct.ca!nntp.portal.ca!van-bc!news.rmii.com!rainbow.rmi.net!rainbow!jonz
From: [e-mail] (Bea and Marvin Jones)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: How can I dye plastic enclosures?
Date: 17 Dec 1996 17:51:54 GMT
Organization: Rocky Mountain Internet - (800) 900-RMII
Lines: 33
Message-ID: <596mjq$[e-mail]>
References: <[e-mail]> <[e-mail]>
NNTP-Posting-Host: rainbow.rmii.com
X-Newsreader: TIN [version 1.2 PL2]

Mitch Kobierowski (KJ7JA) ([e-mail]) wrote:
: John C. Dillon wrote:
: > I found some inexpensive plastic enclosures for my electronic
: > widgets. Price, fit and form is perfect.  Color is anything but.
: > These are bright yellow, and I need to dye them olive drab or
: > even black. I dyed one in RIT black dye for an hour and got
: > reasonable results (dark teal) but kinda splotchy.

: You said that you tried RIT die for one hour. Did you use any heat?
: I've never tried to die the type of plastic you refer to, but I have
: died several peices of nylon with excellent results. I found thaif you
: bring the die to almost a boil, it only takes about 15 minutes to get
: good color. You need to maintain the high temp for the duration of the
: soaking. I hope this helps.

The suggestion on heat with RIT dye is correct.  Several hundred
years ago -- when I was in the US Air Force -- I wore those ugly
military issue glasses.  (-: The price was right :-)  They had
translucent grey frames.  Someone told me to bring them to a
near-boil on a pan of water and RIT dye.  Luckily black glasses
frames were the fashion choice of the times.  It worked Really Well.

(Too much of a boil and the %^#^&%$ lenses fell out.  :-)

73
Jonesy W3DHJ
__
SK

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



From [e-mail] Sat Dec 21 13:27:03 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!uunet!in1.uu.net!198.68.62.43!oronet!usenet
From: [e-mail] (Jim Weir)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: How can I dye plastic enclosures?
Date: Wed, 18 Dec 1996 01:17:14 GMT
Organization: RST Engineering
Lines: 28
Message-ID: <597goa$[e-mail]>
References: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: rst-engr.oro.net
X-Newsreader: Forte Free Agent 1.0.82

[e-mail] (John C. Dillon) shared these priceless pearls of
wisdom:

->I found some inexpensive plastic enclosures for my electronic
->widgets. Price, fit and form is perfect.  Color is anything but.
->These are bright yellow, and I need to dye them olive drab or
->even black.

We dye nylon and HDPE all the time.  The thing you need to do is get the
temperature of the soak bath up to 150-190F for an hour or so to get the
color into the material.  Different materials melt at different
temperatures, so use the highest temperature you can consistent with
dimensional stability of the material you are dying.

With certain light colors into clear plastic, we have also found that the
addition of a small amount (~5%) of vinegar seems to make the color less
blotchy.  Besides, it makes the place smell like you are canning pickles!!

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] Sat Dec 21 13:27:04 1996
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From: "W.S.H." <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: How To Program Regency XL2000 Radio???
Date: 19 Dec 1996 05:08:58 GMT
Organization: HTS/PCSD
Lines: 9
Message-ID: <01bbed6a$07480fa0$[e-mail]>
NNTP-Posting-Host: s16.portmaster.multipro.com
Mime-Version: 1.0
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X-Newsreader: Microsoft Internet News 4.70.1155

Seeking knowledge on how to program the Transmit / Receive frequencies into
a Regency XL2000 Radio.

Any knowledge on the process may be sent to the e-mail address below.

Thanks in Advance!
--
Shane H.
[e-mail]


From [e-mail] Sat Dec 21 13:27:05 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: How To Program Regency XL2000 Radio???
Date: 19 Dec 1996 16:27:35 GMT
Organization: AOL http://www.aol.com
Lines: 10
Message-ID: <[e-mail]>
References: <01bbed6a$07480fa0$[e-mail]>
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X-Admin: [e-mail]
X-Newsreader: AOL Offline Reader

Hi

There is a chart in the service manual with programming
for specific frequencies.

What are the frequencies you wish to program?

Carl
The2x4
N9EFJ


From [e-mail] Sat Dec 21 13:27:06 1996
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From: Zack Lau <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: I need a little help in designing a sequencer...
Date: Mon, 09 Dec 1996 10:07:26 -0500
Organization: American Radio Relay League
Lines: 11
Message-ID: <[e-mail]>
References: <[e-mail]>
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Mime-Version: 1.0
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X-Mailer: Mozilla 2.0 (Win16; I)
To: Mike Morris <[e-mail]>

N6CA has a circuit in the ARRL Handbook that provides open
collector outputs.  I've written up a simplified version
for my that offers +12 volt outputs and reverse polarity
protection for wiring up simple transverters.  I think that
more projects ought to incorporate reverse polarity
protection, particularly those designed for operation off
batteries.--Zack W1VT  [e-mail]

BTW, it might be a while before its actually published--I
like to write an extra article or two during the winter
months since my weekends aren't so busy.


From [e-mail] Sat Dec 21 13:27:07 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!cs.utexas.edu!geraldo.cc.utexas.edu!usenet
From: Larry Braden <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: info needed: HP 5381A Freq. Counter
Date: Thu, 19 Dec 1996 21:27:08 -0800
Organization: University of Texas at Austin
Lines: 4
Message-ID: <[e-mail]>
NNTP-Posting-Host: slip-78-2.ots.utexas.edu
Mime-Version: 1.0
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X-Mailer: Mozilla 3.01Gold (Win16; I)

Just picked up an HP 5381A Freq Counter.  Of course, the manual wasn't
available. Anyone have any specs, info or comments regarding this
particular unit?  Mostly want to put it to work, but with some idea of
the expected accuracy, frequency range, and input signal specifications.


From [e-mail] Sat Dec 21 13:27:08 1996
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!news.sprintlink.net!news-pen-4.sprintlink.net!news.sprintlink.net!news-hub.sprintlink.net!news.sprintlink.net!news-peer.sprintlink.net!howland.erols.net!feed1.news.erols.com!insync!uunet!in2.uu.net!204.191.160.4!van-bc!ts191.vcr.wis.net!les
From: [e-mail] (les)
Newsgroups: rec.radio.amateur.homebrew
Subject: Info requested on bytek s10 eprom programmer
Date: Sun, 8 Dec 1996 22:33:11
Organization: Online at Wimsey
Lines: 10
Message-ID: <[e-mail]>
NNTP-Posting-Host: ts191.vcr.wis.net
X-Newsreader: Trumpet for Windows [Version 1.0 Rev A]

Does anyone have any info on how to set up the bytek s10 eprom programmer.
I called bytek but they do not have any info any longer as this programmer is
likely 10 years old.
I would like to know what eprom types it programs and how to configure it
with the panel buttons.

please email [e-mail]

tnx
les


From [e-mail] Sat Dec 21 13:27:08 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!news.dra.com!news.good.net!news.good.net!news.goodnet.com!news
From: [e-mail] (Jerry Moulder)
Newsgroups: rec.radio.amateur.homebrew
Subject: Info. on infrared links?
Date: Sat, 14 Dec 1996 16:21:44 GMT
Organization: GoodNet
Lines: 7
Message-ID: <58ujls$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: pay-ts1-1.goodnet.com
X-Newsreader: Forte Free Agent 1.0.82

I'd like to build an audio-grade infrared link.  Does anyone know of
any articles, books, etc. that deal with the subject? I am especially
interested in kinds of IR emitters that are available and how to
modulate them.

Tnx for any help . . . . . . .



From [e-mail] Sat Dec 21 13:27:09 1996
Newsgroups: rec.radio.amateur.homebrew
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!cpk-news-hub1.bbnplanet.com!EU.net!sun4nl!rnzll3!sys3.pe1chl!rob
From: rob@pe1chl (Rob Janssen)
Subject: Re: M55727 Mitsubishi RF Power Module
X-Newsreader: NN version 6.5.0 (NOV)
Reply-To: [e-mail]
Organization: PE1CHL
Message-ID: <E2Br76.KLp@pe1chl>
References: <58go6t$[e-mail]>
Date: Thu, 12 Dec 1996 23:42:41 GMT
Lines: 27

In <58go6t$[e-mail]> Niels Montanana <[e-mail]> writes:

>Has anyone used the M55727 Mitsubishi RF Power Module for a
>P.A. stage at 144Mhz ?

I have.  It has always worked well.
I even have a spare should you (or anyone) need it :-)

>I am after the power supply, biasing and de-coupling circuit.

Simple.  Just apply 9V to the bias pin (switch it with the TX/RX switch).
This is easily made using a 7809.

I made a simple board by cutting out some areas on a small piece of PCB
material.  All supply pins are decoupled close to the device, using a
ceramic cap and a tantalium cap in parallel, and fed via ferrite bead
chokes.
I don't think this was actually in the datasheet, but it "it never hurts".

The piece of PCB is bolted to the heatsink, and two strips of copper are
used to connect the ground area to the mounting flange.

Rob
--
+------------------------------------+--------------------------------------+
| Rob Janssen       [e-mail] | WWWhome: http://www.pe1chl.demon.nl/ |
| AMPRnet:       [e-mail] | AX.25 BBS: PE1CHL@PI8WNO.#UTR.NLD.EU |
+------------------------------------+--------------------------------------+


From [e-mail] Sat Dec 21 13:27:11 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!newsxfer2.itd.umich.edu!worldnet.att.net!newsadm
From: woody white <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: M55727 Mitsubishi RF Power Module
Date: Fri, 13 Dec 1996 02:19:16 -0800
Organization: http://www.geocities.com/capecanaveral/3722
Lines: 42
Message-ID: <[e-mail]>
References: <58go6t$[e-mail]> <E2Br76.KLp@pe1chl>
NNTP-Posting-Host: 207.146.142.135
Mime-Version: 1.0
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X-Mailer: Mozilla 2.01E (Win16; I)

If stability becomes a problem, a copper foil "strap" over the top of the
brick, connected to ground on each end by the mounting screws can help.
Woody

Rob Janssen wrote:
>
> In <58go6t$[e-mail]> Niels Montanana <[e-mail]> writes:
>
> >Has anyone used the M55727 Mitsubishi RF Power Module for a
> >P.A. stage at 144Mhz ?
>
> I have.  It has always worked well.
> I even have a spare should you (or anyone) need it :-)
>
> >I am after the power supply, biasing and de-coupling circuit.
>
> Simple.  Just apply 9V to the bias pin (switch it with the TX/RX switch).
> This is easily made using a 7809.
>
> I made a simple board by cutting out some areas on a small piece of PCB
> material.  All supply pins are decoupled close to the device, using a
> ceramic cap and a tantalium cap in parallel, and fed via ferrite bead
> chokes.
> I don't think this was actually in the datasheet, but it "it never hurts".
>
> The piece of PCB is bolted to the heatsink, and two strips of copper are
> used to connect the ground area to the mounting flange.
>
> Rob
> --
> +------------------------------------+--------------------------------------
+
> | Rob Janssen       [e-mail] | WWWhome: http://www.pe1chl.demon.nl/
|
> | AMPRnet:       [e-mail] | AX.25 BBS: PE1CHL@PI8WNO.#UTR.NLD.EU
|
> +------------------------------------+--------------------------------------
+

--
de  Woody (WB4QXE) -  [e-mail]
Electron Microscopist/Microanalysist,
Ham radio "homebrewer", shade tree mechanic,
'90 Nissan 240SX, wish still had my Mcycle too!
http://www.geocities.com/capecanaveral/3722
.


From [e-mail] Sat Dec 21 13:27:12 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!enews.sgi.com!lll-winken.llnl.gov!news.larc.nasa.gov!usenet
From: "Joseph M. Zawodny" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Making PC boards
Date: Fri, 13 Dec 1996 14:49:49 -0500
Organization: ARB NASA LaRC
Lines: 20
Message-ID: <[e-mail]>
NNTP-Posting-Host: arbd0.larc.nasa.gov
Mime-Version: 1.0
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Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.0 (WinNT; I)

Hi,

        I am just getting started making my own PC boards and
intend to utilize toner from a laser printer to mask the traces
before etching.  My question is this, I about to try using a
product called Toner Transfer System. It is a paper you print
on that has a water soluable coating.  You iron it to transfer
the toner to the copper and then soak in water to release the
paper.  Simple enough, but the paper costs $3.00 a sheet and is
a one use product.  I have heard that some folks use plastic
transparency film to achieve a similar effect.  How does this
work?  How do you do it?  Is there any particular brand of
transparency that works best?

        Thanks,

Work: Dr. Joseph M. Zawodny                     Play: Joe Zawodny
      NASA Langley Research Center                    [e-mail]
      E-mail: [e-mail]               [e-mail]
      [phone]  [phone] FAX


From [e-mail] Sat Dec 21 13:27:13 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!worldnet.att.net!newsadm
From: woody white <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Making PC boards
Date: Sat, 14 Dec 1996 07:01:59 -0800
Organization: http://www.geocities.com/capecanaveral/3722
Lines: 37
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: 207.146.142.245
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 2.01E (Win16; I)

I have used laser transparency stock to make pcbs, but with limited
success. While it is much cheaper, it requires that you carefully peel
away the plastic after it has cooled from ironing on.  The toner
sometimes adhears to the stock better than the copper and pulls away with
it.  I haven't experimented with too many brands/types - some may be
better than others.  _Woody_

Joseph M. Zawodny wrote:
>
> Hi,
>
>         I am just getting started making my own PC boards and
> intend to utilize toner from a laser printer to mask the traces
> before etching.  My question is this, I about to try using a
> product called Toner Transfer System. It is a paper you print
> on that has a water soluable coating.  You iron it to transfer
> the toner to the copper and then soak in water to release the
> paper.  Simple enough, but the paper costs $3.00 a sheet and is
> a one use product.  I have heard that some folks use plastic
> transparency film to achieve a similar effect.  How does this
> work?  How do you do it?  Is there any particular brand of
> transparency that works best?
>
>         Thanks,
>
> Work: Dr. Joseph M. Zawodny                     Play: Joe Zawodny
>       NASA Langley Research Center                    [e-mail]
>       E-mail: [e-mail]               [e-mail]
>       [phone]  [phone] FAX

--
de  Woody (WB4QXE) -  [e-mail]
Electron Microscopist/Microanalysist,
Ham radio "homebrewer", shade tree mechanic,
'90 Nissan 240SX, wish still had my Mcycle too!
http://www.geocities.com/capecanaveral/3722
.


From [e-mail] Sat Dec 21 13:27:14 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!news-peer.gsl.net!news.gsl.net!news-penn.gsl.net!news.gsl.net!wesley.videotron.net!wagner.spc.videotron.ca!news
From: [e-mail] (Eric Vincent)
Newsgroups: rec.radio.amateur.homebrew
Subject: Micor VHF, Help!!!
Date: 18 Dec 1996 04:53:26 GMT
Organization: Personnel
Lines: 9
Message-ID: <597tc6$[e-mail]>
NNTP-Posting-Host: 207.96.136.38
Mime-Version: 1.0
Content-Type: Text/Plain; charset=US-ASCII
X-Newsreader: WinVN 0.99.8 (beta 2)

Anybody can help me with this serial# (xmt43rtn-1100b), I know it's a Motorola

Micor VHF radio and no more.

If you can help me with that e-mail me at
Thank's...

[e-mail]
73'S  From VE2VXT, Quebec City.



From [e-mail] Sat Dec 21 13:27:14 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!worldnet.att.net!uunet!in1.uu.net!155.229.2.176!metro.atlanta.com!cpk-news-feed3.bbnplanet.com!news.ipass.net![e-mail]
From: "David A. Cooley" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Micor VHF, Help!!!
Date: Wed, 18 Dec 1996 19:52:40 -0500
Organization: IPass.net
Lines: 21
Message-ID: <[e-mail]>
References: <597tc6$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: customs27.ipass.net
Mime-Version: 1.0
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Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.01 (Win95; I)
To: Eric Vincent <[e-mail]>

Eric Vincent wrote:
>
> Anybody can help me with this serial# (xmt43rtn-1100b), I know it's a Motoro
la
> Micor VHF radio and no more.
>

Eric,
From the model number, it appears to be a 45 watt unit with carrier
squelch and a standard exciter... Not sure how many channels, as some of
the characters are not in the standard options.

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] Sat Dec 21 13:27:15 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!news.sprintlink.net!news-peer.sprintlink.net!news.onramp.net!usenet
From: Clif <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Mitsubishi Power Module M57727
Date: Mon, 09 Dec 1996 09:33:54 -0600
Organization: OnRamp Technologies; ISP;  Dallas/Ft Worth/Houston, TX USA
Lines: 16
Message-ID: <[e-mail]>
References: <58go0m$[e-mail]>
NNTP-Posting-Host: lbj69.onramp.net
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.01 (Win95; I)
To: Niels Montanana <[e-mail]>

Niels Montanana wrote:
>
> Does anyone have any experience of using the M57727 Mitsubishi
> RF Power Module on 2m?
>
> I am particularly after the power supply/biasing requirements
> and de-coupling arrangements.

RF Parts will supply a data sheet on the module for about $1.
Call them at 1-619-744-0750

Clif
AVVid is an Authorized Kenwood and Icom Service Center
http://rampages.onramp.net/~avvid




From [e-mail] Sat Dec 21 13:27:16 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!howland.erols.net!EU.net!usenet2.news.uk.psi.net!uknet!usenet1.news.uk.psi.net!uknet!xara.net!emerald.xara.net!news.ftech.net!news
From: Niels Montanana <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Mitsubishi Power Module M57727
Date: 9 Dec 1996 18:16:15 GMT
Organization: Legal & Commercial Publishing
Lines: 24
Message-ID: <58hl1f$[e-mail]>
References: <58go0m$[e-mail]> <58hfgr$[e-mail]>
NNTP-Posting-Host: vpop141.frontier-networks.co.uk
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 1.22 (Windows; I; 32bit)
To: [e-mail]

That's pretty similar to my original thoughts. I took a look
at some of the Motorola hybrid application notes and decided
on the following:

1.  1nF and 100nF capacitors decoupling the Vcc and Vbb lines
immediately where the module wires are soldered to the pcb.

2.  Ferrites on all power lines.

3.  10uf Tantalum bead capacitors at the power feed end of the
line (opposite side to the ferrite beads)

4.  Vbb via a MC7809 regulator mounted on the board.

5.  Vcc from the main +ve rail.

If you think this should be okay I'll go ahead - the modules
are pretty expensive so I don't want it to go up in smoke !

Niels Montanana
G8RWG

[e-mail]



From [e-mail] Sat Dec 21 13:27:17 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!EU.net!usenet2.news.uk.psi.net!uknet!usenet1.news.uk.psi.net!uknet!xara.net!emerald.xara.net!news.ftech.net!news
From: Niels Montanana <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Mitsubishi Power Module M57727
Date: 9 Dec 1996 18:17:21 GMT
Organization: Legal & Commercial Publishing
Lines: 24
Message-ID: <58hl3h$[e-mail]>
References: <58go0m$[e-mail]> <58hfgr$[e-mail]>
NNTP-Posting-Host: vpop141.frontier-networks.co.uk
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 1.22 (Windows; I; 32bit)
To: [e-mail]

That's pretty similar to my original thoughts. I took a look
at some of the Motorola hybrid application notes and decided
on the following:

1.  1nF and 100nF capacitors decoupling the Vcc and Vbb lines
immediately where the module wires are soldered to the pcb.

2.  Ferrites on all power lines.

3.  10uf Tantalum bead capacitors at the power feed end of the
line (opposite side to the ferrite beads)

4.  Vbb via a MC7809 regulator mounted on the board.

5.  Vcc from the main +ve rail.

If you think this should be okay I'll go ahead - the modules
are pretty expensive so I don't want it to go up in smoke !

Niels Montanana
G8RWG

[e-mail]



From [e-mail] Sat Dec 21 13:27:18 1996
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!zombie.ncsc.mil!newsgate.duke.edu!agate!howland.erols.net!EU.net!usenet2.news.uk.psi.net!uknet!usenet1.news.uk.psi.net!uknet!xara.net!emerald.xara.net!news.ftech.net!news
From: Niels Montanana <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Mitsubishi Power Module M57727
Date: 9 Dec 1996 18:20:41 GMT
Organization: Legal & Commercial Publishing
Lines: 10
Message-ID: <58hl9p$[e-mail]>
References: <58go0m$[e-mail]> <[e-mail]>
NNTP-Posting-Host: vpop141.frontier-networks.co.uk
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 1.22 (Windows; I; 32bit)
To: [e-mail]

Thanks for the suggestion but this is probably similar to the
data I already have on the device which shows the pin outs,
internal block diagram and operating parameters but no test
circuit details.

Niels Montanana
G8RWG

[e-mail]



From [e-mail] Sat Dec 21 13:27:19 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!news.kei.com!newsfeed.internetmci.com!newsout1.alt.net!news1.alt.net!news.aa.net!ran.zipcon.net!usenet
From: "Program / Case Manager" <[e-mail]>
Newsgroups: alt.radio.amateur,alt.radio.amateur.club,alt.radio.amateur.club.clarc,rec.ham-radio,rec.ham-radio.swap,rec.radio.amateur,rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.amateur.misc
Subject: Mods to the Yaesu FT-50R
Date: 18 Dec 1996 18:28:45 GMT
Organization: Winners of Washington
Lines: 2
Message-ID: <01bbed10$e0380d10$d787c7cd@sci>
NNTP-Posting-Host: smeg.zipcon.net
X-Newsreader: Microsoft Internet News 4.70.1157
Xref: news1.epix.net rec.radio.amateur.equipment:44619 rec.radio.amateur.homebrew:22159 rec.radio.amateur.misc:121066

Anyone know of mods to the Yaesu FT-50R?



From [e-mail] Sat Dec 21 13:27:19 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!news.bbnplanet.com!cam-news-hub1.bbnplanet.com!uunet!in3.uu.net!204.177.71.9!viper.shadow.net!usenet
From: [e-mail] (cRiTTa66)
Newsgroups: alt.radio.amateur,alt.radio.amateur.club,alt.radio.amateur.club.clarc,rec.ham-radio,rec.ham-radio.swap,rec.radio.amateur,rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.amateur.misc
Subject: Re: Mods to the Yaesu FT-50R
Date: Thu, 19 Dec 1996 00:33:08 GMT
Organization: iNdependent
Lines: 6
Message-ID: <32b88d2d.1592327@news>
References: <01bbed10$e0380d10$d787c7cd@sci>
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Xref: news1.epix.net rec.radio.amateur.equipment:44626 rec.radio.amateur.homebrew:22170 rec.radio.amateur.misc:121081

On 18 Dec 1996 18:28:45 GMT, "Program / Case Manager"
<[e-mail]> wrote:

>Anyone know of mods to the Yaesu FT-50R?
>
www.shadow.net/~critta66/ft50.html


From [e-mail] Sat Dec 21 13:27:20 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-ana-24.sprintlink.net!nntp.primenet.com!mr.net!newshub.tc.umn.edu!newsstand.tc.umn.edu!usenet
From: [e-mail]
Newsgroups: alt.radio.amateur,alt.radio.amateur.club,alt.radio.amateur.club.clarc,rec.ham-radio,rec.ham-radio.swap,rec.radio.amateur,rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.amateur.misc
Subject: Re: Mods to the Yaesu FT-50R
Date: Thu, 19 Dec 1996 07:06:21 GMT
Organization: University of Minnesota
Lines: 8
Message-ID: <[e-mail]>
References: <01bbed10$e0380d10$d787c7cd@sci>
NNTP-Posting-Host: pub-19-a-190.dialup.umn.edu
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Mods and more at http://members.gnn.com/hca/ft50


"Program / Case Manager" <[e-mail]> wrote:

>Anyone know of mods to the Yaesu FT-50R?
>



From [e-mail] Sat Dec 21 13:27:21 1996
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From: [e-mail] (Gary Hosler)
Newsgroups: alt.radio.amateur,alt.radio.amateur.club,alt.radio.amateur.club.clarc,rec.ham-radio,rec.ham-radio.swap,rec.radio.amateur,rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.amateur.misc
Subject: Re: Mods to the Yaesu FT-50R
Date: Thu, 19 Dec 1996 15:08:32 GMT
Organization: 3M - St. Paul, MN  55144-1000 US
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"Program / Case Manager" <[e-mail]> wrote:

>Anyone know of mods to the Yaesu FT-50R?

What is it that you are trying to modify?  Something not working
properly?  Could you be a bit more specific?

de KN0Z  Gary

Opinions expressed herein are my own and may not represent those of my employe
r.


From [e-mail] Sat Dec 21 13:27:22 1996
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From: [e-mail] (Steve Dakin)
Newsgroups: rec.radio.amateur.homebrew
Subject: Motorola Snytor
Date: 19 Dec 1996 14:06:13 GMT
Organization: Tandy Information Services
Lines: 12
Message-ID: <59bi4l$[e-mail]>
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I am looking for some help programming a
Motorola Syntor.  This is an early 80's
vintage UHF mobile that uses PROM chips
to store the frequency and PL tone info.
I have the tools (PROM burner) to do
this, but lack the algorithm.  Any help
would be appreciated.

Thanks,
Steve Dakin WQ5N
[e-mail]



From [e-mail] Sat Dec 21 13:27:23 1996
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From: [e-mail] (Kent Farnsworth)
Newsgroups: rec.radio.amateur.homebrew
Subject: MRF-247 at 6 meters problem?
Date: Fri, 13 Dec 1996 04:10:27 GMT
Organization: Real/Time Communications Internet customer posting
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I have built a 6 meter amp that is using the MRF-247 transistor, and
am having trouble with the output. I used the computations in the RF
book for the filters and impedence matching networks, but the output
is flaky.

The input impedence looks ok, as my 6m meter rig sees about 2 watts of
power with a 1.2 SWR. The output swings around with major harmonics on
my spectrum analyzer, and changes with time.

I used the Motorola AN791 in the RF applications reports book page
156. I computed the difference in the frequencies from the formulas in
the book. Are they correct? I had to modify the input values to get a
good input SWR. The output is not what I would expect.

I am currently seeing about 15w output from 2W input, which again
changes with time.

I know that this transistor is designed for 2m, but I can't believe
that it is not usefull at a lower frequency.

Thank you for you help.

Kent - de KC5WPW





From [e-mail] Sat Dec 21 13:27:24 1996
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From: [e-mail] (Fabio Mantovani, IZ4AFW)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Need a Relay & a Pllace 2 Get 1 !
Date: Thu, 12 Dec 1996 18:28:02 GMT
Organization: NETTuno
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[e-mail] (Bad  Dog) wrote:

>Help I need a Relay !!!   I own this older 10 meter/6 meter amplifier
>there help me find the right parts people? If so please help me I need
>a
>Relay and I need a new parts catalog  Thanx :)

Have you tried DigiKEY? http://www.digikey.com, with online catalogs &
searching...
You could try also NTE Inc. http://www.nteinc.com/index.html
and TECCOR http://www.teccor.com

See you,

Ciao,
 Fabio
 IZ4AFW
--
CallSign  IZ4AFW
EMail     [e-mail]
          [e-mail]
FidoNet   2:332/413.15
Home Page http://www.geocities.com/SiliconValley/Park/2219



From [e-mail] Sat Dec 21 13:27:24 1996
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From: [e-mail] (SJ Creamer)
Newsgroups: rec.radio.amateur.homebrew
Subject: Need help -Eico 955
Date: Sun, 15 Dec 1996 12:35:05 GMT
Organization: Nirvana Audio
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I hope someone can answer this. I have an Eico 955, in circuit
capacitance tester. The unit is missing the test lead. I understand
the cable used for this lead is most important for an accurate
reading. Does anyone have a clue as to what the origional test cables
designation was?

Any help will be most appreciated.

Please reply via e-mail, since I don't frequent this group.

SJ Creamer


From [e-mail] Sat Dec 21 13:27:25 1996
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From: J&J Mac <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Need HF Amp Schematic(s)
Date: Wed, 11 Dec 1996 11:40:17 -0800
Organization: West Coast Online's News Server - Not responsible for content
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To: [e-mail]

[e-mail] wrote:
>
> I need diagrams for HF amps, (20 meters), please tell me where I can
> get them.
>
> Thanks,
> Scott, KF6FCN

I don't have their number handy but try Communication Concepts Inc.  CCI has l
oads of HF amp plans
and kits.

Jim.. KB6ZOP


From [e-mail] Sat Dec 21 13:27:26 1996
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From: [e-mail] (Gary Hosler)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Need HF Amp Schematic(s)
Date: Mon, 09 Dec 1996 17:35:39 GMT
Organization: 3M - St. Paul, MN  55144-1000 US
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[e-mail] wrote:

>I need diagrams for HF amps, (20 meters), please tell me where I can
>get them.

>Thanks,
>Scott, KF6FCN

Any copy of the Radio Amateurs Handbook since the earth cooled, or any
copy of the Radio Handbook by Bill Orr.

de KN0Z  Gary

Opinions expressed herein are my own and may not represent those of my employe
r.


From [e-mail] Sat Dec 21 13:27:27 1996
Newsgroups: rec.radio.amateur.homebrew
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From: [e-mail] (David Feldman)
Subject: Need meter repair
Message-ID: <[e-mail]>
Organization: Organization? Me?
Date: Fri, 20 Dec 1996 04:07:50 GMT
Lines: 9
Sender: [e-mail]

Looking for someone to repair a weston panel meter that is not deflecting
but still has DC continuity at the terminals. Pls e-mail any suggestions!

Thanx,

73 Dave WB0GAZ [e-mail]
~
~



From [e-mail] Sat Dec 21 13:27:28 1996
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From: viny Coppola <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew,rec.radio.amateur.misc,sci.electronics.design
Subject: Need Yig Oscillator, Xband
Date: 11 Dec 1996 17:35:53 GMT
Organization: CompuServe, Inc. (1-800-689-0736)
Lines: 6
Message-ID: <58mrdp$4hs$[e-mail]>
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Looking for a Yig Oscillator to cover around 9 to 12 ghz, for
building a homebrew sweeper.

Thanks,
VINY N1VC


From [e-mail] Sat Dec 21 13:27:29 1996
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From: [e-mail] (Phil Clements)
Newsgroups: rec.radio.amateur.homebrew
Subject: Need: Cross-ref. on Motorola FET
Date: 19 Dec 1996 00:20:45 GMT
Organization: Your Organization
Lines: 10
Message-ID: <59a1ot$[e-mail]>
NNTP-Posting-Host: a1p44.connect.net
X-Newsreader: WinVN 0.92.1

I have a Collins Spectrum 2000 H.F. amp, Model PA-2000 (yes, the
Dessert Storm surplus is hitting the market!). It uses 8 SRF-3513B
devices in the final. This is a proprietary number made my Motorola
for Rockwell. I need data on the devices in order to construct a
power supply for the amp. Surely there is a generic "MRF" equivalent
number for these devices. Any leads or tips will be appreciated and
acted upon.

Thanks!
Phil, K5PC  [e-mail]


From [e-mail] Sat Dec 21 13:27:29 1996
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From: [e-mail] (yorshire)
Newsgroups: rec.radio.amateur.homebrew
Subject: Needed, Shortwave radio components
Date: 18 Dec 1996 03:22:53 GMT
Organization: enter.net
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Can anyone recommend a sourse of S.W. components, such as coils,
oscillators, filters, etc that deal with the hobbyist. New at building and nee
d
parts.



From [e-mail] Sat Dec 21 13:27:30 1996
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From: [e-mail] (Michael Horowitz)
Newsgroups: rec.radio.amateur.homebrew
Subject: O'scope - Trigger level/Var Sweep
Date: Sun, 15 Dec 1996 23:41:57 GMT
Organization: Erol's Internet Services
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Folks -

   I can stop a pulse from moving across my scope screen by playing
with either the  Trigger level or the Variable Sweep; the former seems
to lock in more firmer; This is a dual sweep scope, so I've noticed I
can display two "in sync" pulses as if they were not in sync, so it's
possible to get an erronerous reading. What's the smart way to use
these two controls?(the Hold Offest is off)
Thanks, Mike





From [e-mail] Sat Dec 21 13:27:31 1996
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From: Ron Myers <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Packet pgm
Date: Sat, 14 Dec 1996 22:33:44 -0500
Organization: Info Avenue INTERNET Access
Lines: 19
Message-ID: <[e-mail]>
References: <[e-mail]>
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Ron Giuntini wrote:
>
> I just got a used TNC and I assume it is fine.  However, I am having trouble
> getting the computer to talk to it...I have an IBM PC and am using
> BITCOM...I tried everything but no luck...Does anyone know where I can find
> another (simpler) communications program? Bitcom is one of those extremely
> complicated programs intended to frighten everyone away from their
> computer...I have the old 360K disk drives as well...A copy of Pakratt-88
> might be what I am looking for, or anything that anyone is using
> successfully would be appreciated...Thanks KB6GK
>                         Ron
You can check out a TNC, and operate quite well with the windows
terminal program.  It's simple and direct.  After you have verified that
the TNC is talking to the computer, try the more sophisticated
programs.  Most of the time, a new user does not have the computer baud
rate set to match the TNC, and everything is garbage.  Try several
rates, starting with 1200 baud and hit the * (asterisk) several times to
set the autobaud.
Lots of luck  ... KB4EG Ron


From [e-mail] Sat Dec 21 13:27:32 1996
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From: [e-mail] (Ron Giuntini)
Newsgroups: rec.radio.amateur.homebrew
Subject: Packet pgm
Date: 15 Dec 96 01:42:41 GMT
Organization: ucsd usenet gateway
Lines: 10
Message-ID: <[e-mail]>
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]

I just got a used TNC and I assume it is fine.  However, I am having trouble
getting the computer to talk to it...I have an IBM PC and am using
BITCOM...I tried everything but no luck...Does anyone know where I can find
another (simpler) communications program? Bitcom is one of those extremely
complicated programs intended to frighten everyone away from their
computer...I have the old 360K disk drives as well...A copy of Pakratt-88
might be what I am looking for, or anything that anyone is using
successfully would be appreciated...Thanks KB6GK
                        Ron



From [e-mail] Sat Dec 21 13:27:33 1996
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From: [e-mail] (Ron Giuntini)
Newsgroups: rec.radio.amateur.homebrew
Subject: Packet pgm
Date: 19 Dec 96 01:00:33 GMT
Organization: ucsd usenet gateway
Lines: 14
Message-ID: <E0vaWqe-0006Pc-00@fox>
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]

Thanks to all that replied...I am running an old IBM PC and not windows, so
unfortunatly I cannot use any newer windows packet programs...I found the
problem that was preventing my system to work..Two actually.,..1 The TNC
required a reset by removing the lithium battery. Something was not
compatable with my computer..2 There was a flaky connection in the TNC to
Radio cable...After finding and correcting these two items the thing went
right to work...Now, however, I am still looking for suggestions for a more
efficient terminal program...Bitcom does not allow me to save incoming stuff
to disc or to scroll back thru stuff that has gone by on the screen..Any
suggestions? Remember, this is an old system...640K memory & 360K drive.  I
do have a 30Meg hard drive in it...The reason I am using such an old
computer is because it was free...Thanks.
                        Ron



From [e-mail] Sat Dec 21 13:27:34 1996
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From: Bigdad <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Packet pgm
Date: 19 Dec 1996 21:56:54 GMT
Organization: WorldWide Access (tm) - Chicagoland Internet Services (http://www.wwa.com)
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[e-mail] (Ron Giuntini) wrote:
>Thanks to all that replied...I am running an old IBM PC and not windows, so
>unfortunatly I cannot use any newer windows packet programs...I found the
>problem that was preventing my system to work..Two actually.,..1 The TNC
>required a reset by removing the lithium battery. Something was not
>compatable with my computer..2 There was a flaky connection in the TNC to
>Radio cable...After finding and correcting these two items the thing went
>right to work...Now, however, I am still looking for suggestions for a more
>efficient terminal program...Bitcom does not allow me to save incoming stuff
>to disc or to scroll back thru stuff that has gone by on the screen..Any
>suggestions? Remember, this is an old system...640K memory & 360K drive.  I
>do have a 30Meg hard drive in it...The reason I am using such an old
>computer is because it was free...Thanks.
>                       Ron
>

Yes ... there is a program called LYNC that should work just
fine..it has all the bells and whistles of a bigtime term program
but is very small in size and easy to set up. Do a search for the
name LYNC and it should pop up



From [e-mail] Sat Dec 21 13:27:35 1996
Newsgroups: misc.industry.electronics.marketplace,comp.robotics.misc,sci.electronics.design,sci.electronics.equipment,sci.electronics.misc,sci.electronics.basics,rec.radio.amateur.homebrew
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From: [e-mail] (Kevin Horton)
Subject: Re: PIC Programmer Holiday Specials until 12/31/96!
X-Nntp-Posting-Host: ind-0003-9.iquest.net
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In article <58k9hq$[e-mail]>,
   [e-mail] (Tom Bruhns) wrote:
>ITU Technologies ([e-mail]) wrote:
>:                              ITU'S HOLIDAY SALE!
>
>followed by an unabashed advertisment.  I'm interested in any comments
>folk may have on these products or other PIC programming bundles such
>as the ones that DigiKey offers (Microchip "Picstart" and Parallax
>PIC programmers).  I'm especially interested in knowing which of the
>readily available, reasonably inexpensive ones offer the best
>programming environments, and which work best with the smallest
>available PICs.  And are there smaller PICs than the 18-pin SOIC
>size in the DigiKey catalog?  What are the best hobby-type resources
>for this processor line?
>
OK, I've been using the PIC for quite awhile now, and at work we got a
Picstart 16B-1 I think it is.  It does the 16C5x, 16C7x, and 16C8x series.
We paid $200 for it, but they included 4 samples and gave us *lots* of
literature.  A few months ago, I picked up a Picstart Plus at one of their
seminars.  It was $150, but it does all chips up to 40 pins.  Both plug into
the PC via a serial port.

As yo your other question- you can get 8-pin PICs!  These have internal
4Mhz oscillators, or can use an external one.  You can have up to 6 I/O
lines, but less if you use an external osc.  This chip has to rate high on the
'coolness' scale, IMHO.  The only problem with it is it's only in OTP, tho
they're going to try and put it in like an 18-pin windowed DIP, according to t
he
guy I talked to at the seminar.  They also have a 64-pin PIC that can control
an LCD
display or you can configure it up for *alot* of I/Os, tho I cannot remember h
ow
many.

As to the software, you can get it free from Microchip, and it's pretty darned
good.  You can also get things like a 'C' compiler, but I think for a chip wit
h
512 words of space that's way over-kill. (IMHO)  PIC ASM isn't too hard to lea
rn-
it's just diffrent.  I was saying 'oh, I can do that?' for awhile when I was
programming it. :-)

Also, I find Digi-key's prices to be kinda high for some of the parts, but whe
re
else can you get one of 'em at a shot?



From [e-mail] Sat Dec 21 13:27:37 1996
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From: [e-mail] (Chris Dalla)
Newsgroups: misc.industry.electronics.marketplace,comp.robotics.misc,sci.electronics.design,sci.electronics.equipment,sci.electronics.misc,sci.electronics.basics,rec.radio.amateur.homebrew
Subject: Re: PIC Programmer Holiday Specials until 12/31/96!
Date: 12 Dec 1996 13:38:08 GMT
Organization: The People's Front of Judea
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In article <58i75i$[e-mail]>, [e-mail] says...
>
>In article <58k9hq$[e-mail]>,
>   [e-mail] (Tom Bruhns) wrote:
>>ITU Technologies ([e-mail]) wrote:
>>:                              ITU'S HOLIDAY SALE!
>>
>As yo your other question- you can get 8-pin PICs!  These have internal
>4Mhz oscillators, or can use an external one.  You can have up to 6 I/O
>lines, but less if you use an external osc.  This chip has to rate high on
>the 'coolness' scale, IMHO.  The only problem with it is it's only in OTP,
>tho they're going to try and put it in like an 18-pin windowed DIP, according

>to the guy I talked to at the seminar.  They also have a 64-pin PIC that can
>control an LCD display or you can configure it up for *alot* of I/Os, tho I
>cannot remember how many.

Just to let you know...there are windowed versions of the 12C50x (8-pin) parts

available.  Limited quantities right now, but they do exist.

-c



From [e-mail] Sat Dec 21 13:27:38 1996
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From: preston <[e-mail]>
Newsgroups: misc.industry.electronics.marketplace,comp.robotics.misc,sci.electronics.design,sci.electronics.equipment,sci.electronics.misc,sci.electronics.basics,rec.radio.amateur.homebrew
Subject: Re: PIC Programmer Holiday Specials until 12/31/96!
Date: Thu, 12 Dec 1996 08:26:38 -0800
Organization: Tektronix, Inc, Beaverton, OR, USA
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Tom Bruhns wrote:
>
> ITU Technologies ([e-mail]) wrote:
> :                              ITU'S HOLIDAY SALE!
>
> followed by an unabashed advertisment.  I'm interested in any comments
> folk may have on these products or other PIC programming bundles such
> as the ones that DigiKey offers (Microchip "Picstart" and Parallax
> PIC programmers).

Tom,

I bought ITU's PIC-1 programmer a little better than a year ago and
have had no problems with the device.  The kit was easy to assemble and
resonably well documented.  It has performed flawlessly for the past
year on my personal hobby projects.

On the downside: When I purchased the kit from ITU, they indicated
that new software implementing some features found in higher priced
programmers was "in the works" and should be released "in the spring".
Unfortunately, this has not happened.  Furthermore, Microchip has
released several new uP's which would be fun to work with.  I have
emailed ITU a couple times asking about the long awaited software
release and have received no response.  Since the time of my purchase,
ITU has brought on several new products which they appear to be pushing
rather than their own designs.  There appears to be no long term
commitment either to maintain their own designs or support their
previous customers.

If I were to do it over now, I believe I would get a programmer (such
as the PIC Start-Plus) from a company I know will support their
product long term.  I believe the differance in price between the low
end programmers Microchip sells and the smaller guys can largely be
attributed to support.  This support means your hardware will not be
outdated in less than a year!

Just my $.02

Regards,

Preston Gabel

-----------------------------------------------------------------------
   Preston Gabel                        Email: [e-mail]
       Tektronix, Inc
       PO Box 500 (m/s 50-744)          Voice:  503 627-4605
       Beaverton, OR  97077-0001          FAX:  [phone]
-----------------------------------------------------------------------
    The views expressed herein are the personal responsibility of
    the author, and may or may not be in agreement with those of
                        Tektronix, Inc.
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From [e-mail] Sat Dec 21 13:27:39 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 13:27:40 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
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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 13:27:42 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 13:27:43 1996
Newsgroups: rec.radio.amateur.homebrew
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From: [e-mail] (Thomas G. McWilliams)
Subject: Re: PLL's
Message-ID: <[e-mail]>
Organization: Jot-Em-Down Store and Library
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John Kolb ([e-mail]) wrote:
: Low freq noise within the loop bandwidth will be mostly canceled by
: the PLL ( it can't cancel it all - it doesn't start to react untill
: it detects a change has already occured ), but higher freq noise
: components above the loop time constants will not be canceled.

John,

Could you elaborate? Your explanation seems counter-intuitive because
the the VCO of a PLL is usually fed with a low-pass filter. Shouldn't it
be that higher frequency noise is cancelled by the PLL? It seems that
the only noise components which could modulate the VCO would be low
frequency noise components which are below the cut-off frequency of the
low-pass filter. Perhaps I'm overlooking something . . .

73,

Thomas KI4N



From [e-mail] Sat Dec 21 13:27:43 1996
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From: [e-mail] (John Kolb)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: PLL's
Date: 15 Dec 1996 03:29:20 GMT
Organization: CTS Network Services (CTSNET), San Diego, CA
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Thomas G. McWilliams ([e-mail]) wrote:
: John Kolb ([e-mail]) wrote:
: : Low freq noise within the loop bandwidth will be mostly canceled by
: : the PLL ( it can't cancel it all - it doesn't start to react untill

: Could you elaborate? Your explanation seems counter-intuitive because
: the the VCO of a PLL is usually fed with a low-pass filter. Shouldn't it
: be that higher frequency noise is cancelled by the PLL? It seems that

A varacter tuned VCO has very high phase noise sidebands compared
to one tuned with a good variable cap as in a general coverage
receiver. Phase noise within the loop bandwidth can be canceled by
the loop - noise above the cutoff freq of the low pass filter
cannot be corrected.

John



From [e-mail] Sat Dec 21 13:27:44 1996
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From: [e-mail] (Richard Karlquist)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: PLL's
Date: 15 Dec 1996 19:08:54 GMT
Organization: Hewlett-Packard
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In article <58vrag$[e-mail]>, John Kolb <[e-mail]> wrote:
>
>A varacter tuned VCO has very high phase noise sidebands compared
>to one tuned with a good variable cap as in a general coverage
>receiver. Phase noise within the loop bandwidth can be canceled by

Not necessarily.  If the unloaded Q of the varactor is much higher
than the unloaded Q of the inductor, the inductor will be the
limiting factor, and there will be no advantage to replacing the
varactor with a variable capacitor of even higher Q.  [Phase
noise is inversely proportional to Q].  The best ferrite
inductors, to my knowledge, top out at an unloaded Q of about
500.  Varactors with Q's of many thousands are commonly
available.  Of course, good engineering practice must be followed
regarding tuning voltage management to avoid externally induced
noise from being generated in the varactor.  Another tip is to
always take the output directly from the tank, and use a low
phase noise buffer amplifier following the oscillator.

Rick Karlquist, N6RK
[e-mail]


From [e-mail] Sat Dec 21 13:27:45 1996
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From: Joe Carey <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: PLL's
Date: Tue, 17 Dec 1996 13:03:40 -0700
Organization: QUALCOMM, Inc
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To: "Thomas G. McWilliams" <[e-mail]>

Thomas G. McWilliams wrote:
>
> John Kolb ([e-mail]) wrote:
> : Low freq noise within the loop bandwidth will be mostly canceled by
> : the PLL ( it can't cancel it all - it doesn't start to react untill
> : it detects a change has already occured ), but higher freq noise
> : components above the loop time constants will not be canceled.
>
> John,
>
> Could you elaborate? Your explanation seems counter-intuitive because
> the the VCO of a PLL is usually fed with a low-pass filter. Shouldn't it
> be that higher frequency noise is cancelled by the PLL? It seems that
> the only noise components which could modulate the VCO would be low
> frequency noise components which are below the cut-off frequency of the
> low-pass filter. Perhaps I'm overlooking something . . .
>
> 73,
>
> Thomas KI4N


Yeah, it's kind of funny sounding.  This only applies when a PLL is being
used with a precise reference, for example in a frequency synthesizer.

What is happening is that the reference oscillator (often a TCXO or
oven controlled Xtal oscillator) typically has VERY good phase noise.
Any phase noise from the VCO (which tends to be pretty bad in this
respect) shows up as an error from the phase detector (typically a mixer).
The low pass filter can respond to this error if it falls within the
passband, but otherwise it can't and the VCO runs "open loop."  So
what is happening is any phase noise out of the VCO shows up as
an error and gets corrected by the loop, provided it falls within
the loop bandwidth.

Afer you know the "why" it becomes obvious that to make this work
you've gotta have a very low phase noise reference.

        Joe


From [e-mail] Sat Dec 21 13:27:46 1996
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From: [e-mail] (Richard Karlquist)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: PLL's
Date: 18 Dec 1996 20:21:29 GMT
Organization: Hewlett-Packard
Lines: 27
Message-ID: <599jo9$[e-mail]>
References: <57qrpb$[e-mail]> <58vrag$[e-mail]> <591ic6$[e-mail]> <5996a5$[e-mail]>
NNTP-Posting-Host: mentor23.scd.hp.com

In article <5996a5$[e-mail]>, John Kolb <[e-mail]> wrote:
>Richard Karlquist ([e-mail]) wrote:
>: In article <58vrag$[e-mail]>, John Kolb <[e-mail]> wrote
:
>: >
>: >A varacter tuned VCO has very high phase noise sidebands compared
>: >to one tuned with a good variable cap as in a general coverage
>: >receiver. Phase noise within the loop bandwidth can be canceled by
>
>: Not necessarily.  If the unloaded Q of the varactor is much higher
>: than the unloaded Q of the inductor, the inductor will be the
>: limiting factor, and there will be no advantage to replacing the
>
>The last PLL design I did (years ago), I used a capacitor at the end of
>a ~ 1/4 wavelength piece of coax to replace the inductor to obtain a
>higher Q. Worked pretty well in an oscillator that tuned from 40-50 MHz.
>
>John

A rule of thumb is that a coaxial resonator has the same Q as an air
coil of half the diameter.  To get a Q of 50 at 50 MHz. with an air
coil requires a diameter of about 1/14 of an inch.  Hence, you would
need coax of 1/7 inch to get a Q of 50, i.e. 0.141 semi rigid coax.
A Q of 50 is close to what you get with an ordinary 10 cent molded
inductor.  So there is no free lunch here.

Rick Karlquist N6RK
[e-mail]


From [e-mail] Sat Dec 21 13:27:47 1996
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From: [e-mail] (John Kolb)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: PLL's
Date: 18 Dec 1996 16:32:05 GMT
Organization: CTS Network Services (CTSNET), San Diego, CA
Lines: 17
Message-ID: <5996a5$[e-mail]>
References: <57qrpb$[e-mail]> <57so1t$[e-mail]> <[e-mail]> <58vrag$[e-mail]> <591ic6$[e-mail]>
NNTP-Posting-Host: sd-i2.cts.com

Richard Karlquist ([e-mail]) wrote:
: In article <58vrag$[e-mail]>, John Kolb <[e-mail]> wrote:
: >
: >A varacter tuned VCO has very high phase noise sidebands compared
: >to one tuned with a good variable cap as in a general coverage
: >receiver. Phase noise within the loop bandwidth can be canceled by

: Not necessarily.  If the unloaded Q of the varactor is much higher
: than the unloaded Q of the inductor, the inductor will be the
: limiting factor, and there will be no advantage to replacing the

The last PLL design I did (years ago), I used a capacitor at the end of
a ~ 1/4 wavelength piece of coax to replace the inductor to obtain a
higher Q. Worked pretty well in an oscillator that tuned from 40-50 MHz.

John



From [e-mail] Sat Dec 21 13:27:48 1996
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From: [e-mail] (Lars Moell)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: PLL's
Date: Thu, 19 Dec 1996 09:39:22 GMT
Organization: National Defence Research Establishment, Sweden
Lines: 35
Message-ID: <[e-mail]>
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Hi
using a 0.141 semi-rigid  cable would make sense if one is concerned
of microphonics. Using "normal" inductors mecanical stability can be a
real pain
73 Lasse /SM5GLC
[e-mail] (Richard Karlquist) wrote:

>In article <5996a5$[e-mail]>, John Kolb <[e-mail]> wrote:
>>Richard Karlquist ([e-mail]) wrote:
>>: In article <58vrag$[e-mail]>, John Kolb <[e-mail]> wrot
e:
>>: >
>>: >A varacter tuned VCO has very high phase noise sidebands compared
>>: >to one tuned with a good variable cap as in a general coverage
>>: >receiver. Phase noise within the loop bandwidth can be canceled by
>>
>>: Not necessarily.  If the unloaded Q of the varactor is much higher
>>: than the unloaded Q of the inductor, the inductor will be the
>>: limiting factor, and there will be no advantage to replacing the
>>
>>The last PLL design I did (years ago), I used a capacitor at the end of
>>a ~ 1/4 wavelength piece of coax to replace the inductor to obtain a
>>higher Q. Worked pretty well in an oscillator that tuned from 40-50 MHz.
>>
>>John
>
>A rule of thumb is that a coaxial resonator has the same Q as an air
>coil of half the diameter.  To get a Q of 50 at 50 MHz. with an air
>coil requires a diameter of about 1/14 of an inch.  Hence, you would
>need coax of 1/7 inch to get a Q of 50, i.e. 0.141 semi rigid coax.
>A Q of 50 is close to what you get with an ordinary 10 cent molded
>inductor.  So there is no free lunch here.
>
>Rick Karlquist N6RK
>[e-mail]



From [e-mail] Sat Dec 21 13:27:49 1996
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From: [e-mail] (John Kolb)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: PLL's
Date: 19 Dec 1996 03:48:02 GMT
Organization: CTS Network Services (CTSNET), San Diego, CA
Lines: 22
Message-ID: <59adti$[e-mail]>
References: <57qrpb$[e-mail]> <58vrag$[e-mail]> <591ic6$[e-mail]> <5996a5$[e-mail]> <599jo9$[e-mail]>
NNTP-Posting-Host: sd-i2.cts.com

Richard Karlquist ([e-mail]) wrote:
: In article <5996a5$[e-mail]>, John Kolb <[e-mail]> wrote:
: >Richard Karlquist ([e-mail]) wrote:
: >: In article <58vrag$[e-mail]>, John Kolb <[e-mail]> wro
te:
: >: >
: >The last PLL design I did (years ago), I used a capacitor at the end of
: >a ~ 1/4 wavelength piece of coax to replace the inductor to obtain a
: >higher Q. Worked pretty well in an oscillator that tuned from 40-50 MHz.

: A rule of thumb is that a coaxial resonator has the same Q as an air
: coil of half the diameter.  To get a Q of 50 at 50 MHz. with an air
: coil requires a diameter of about 1/14 of an inch.  Hence, you would
: need coax of 1/7 inch to get a Q of 50, i.e. 0.141 semi rigid coax.
: A Q of 50 is close to what you get with an ordinary 10 cent molded
: inductor.  So there is no free lunch here.

I don't think that rule of thumb applies in this case - The 1/4
wavelength inverts the reactance of the C so that it looks like
an L. I wasn't making an inductor by winding the coax into a circle.

John



From [e-mail] Sat Dec 21 13:27:51 1996
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Newsgroups: rec.radio.amateur.homebrew
Subject: Re: PLL's
Message-ID: <[e-mail]>
From: Don Labriola <[e-mail]>
Date: Thu, 19 Dec 1996 08:26:33 -0800
Reply-To: [e-mail]
References: <57qrpb$[e-mail]>
 <57uumn$[e-mail]> <58l80o$[e-mail]>
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Organization: DDC, Beckman Instruments, Inc.
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Larry Martin wrote:
>
> [e-mail] () wrote:
> >[e-mail] (Zack Clobes) wrote:
> >
> >>I was reading an article in the latest copy of QST covering the
> >>theory/construction of a temp compensated VFO.  The schematic reminded me
of a
> >>PLL with a feedback loop tied to a crystal oscilator.  In his article, he
made
> >>the statment that his VFO wouldn't have the extra phase noise that a
> >>traditional PLL has because of the loop.  Can anyone explain this?  I didn
't
> >>think that the VCO wouldn't be effected by the locking loop.
> >>Thanks
> >>73s de Zack, W0ZC
> >Within the loop bandwidth of the PLL, the phase noise at the output,
> >is equal to the reference osc. noise multiplied by the total division
> >factor, N. The phase noise outside of the Loop bandwidth is that of
> >the VCO.
> >Reference: PLL Primer, by Andrzej Przedpelski
> >
> >ie, you will decrease phase noise within the loop bandwidth of the
> >PLL.
> >
> Gross oversimplification!  :)
> Larry
There was a pretty good write up on one of these in either 73 magazine
or RF design within the last couple of months (I'll try to find the
article and post the reference to it) - It included both the theory and
the measurements. It was basically what they called a "stabilized VCO".
As I remember it, the VCO was built with high Q components so as to
minimize the basic phase noise of the oscillillator, and then a very low
bandwidth correction was used (time constant of several SECONDS) to keep
the oscillator from drifting more than 1-2 Hz from the wanted frequency.
The article professed that the major improvement in close-in phase noise
was primairly due to the high Q of the oscillator tank. The set up was a
bit slow to tune, but the phase noise was apparently quite good! (I know
that this is still a simplification... the article was about 4-5 pages
long! :o)

73's de W6QS - Don Labriola


From [e-mail] Sat Dec 21 13:27:51 1996
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From: steven bomba <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: PVC pipe strength
Date: Sat, 14 Dec 1996 16:59:48 -0600
Organization: Exec-PC BBS Internet - Milwaukee, WI
Lines: 5
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Can anyone direct me to a source of structural properties of PVC pipe so
I can design an antenna support?

steven, k9ier
[e-mail]


From [e-mail] Sat Dec 21 13:27:52 1996
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From: "Joseph M. Zawodny" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Q: good 6m xvtr
Date: Thu, 12 Dec 1996 11:51:30 -0500
Organization: ARB NASA LaRC
Lines: 20
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References: <58otvu$[e-mail]>
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[e-mail] wrote:
>
> Have plans to buy a 6m transverter-kit, 10 or 2 to 6m
> type, and would like to hear some experiences on the issue?
> Are Ten_tec OK - what about Downeast etc...

I built the TenTec 1209 2m to 6m transverter.  All in all a very
nice kit and a pleasure to build.  The only thing I changed was
to add external keying of the T/R switching since the RF sense
switching circuit did not work well on SSB.  Easy enough to do
though.

        73 & CUon6

                KO4LW
--
Work: Dr. Joseph M. Zawodny                     Play: Joe Zawodny
      NASA Langley Research Center                    [e-mail]
      E-mail: [e-mail]               [e-mail]
      [phone]  [phone] FAX


From [e-mail] Sat Dec 21 13:27:53 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Q: good 6m xvtr
Date: 12 Dec 1996 12:31:58 GMT
Organization: Ericsson
Lines: 9
Message-ID: <58otvu$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: kicc16.eraj.ericsson.se

Have plans to buy a 6m transverter-kit, 10 or 2 to 6m
type, and would like to hear some experiences on the issue?
Are Ten_tec OK - what about Downeast etc...

DYI all the way ? I have at least 5,  6m xvtr projects from
various ham-magz. but seen to little of 6m xvtr kits.
--
Chris



From [e-mail] Sat Dec 21 13:27:54 1996
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From: [e-mail] (K1BQT)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Q: good 6m xvtr
Date: 12 Dec 1996 23:31:33 GMT
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Hi Chris--

My understanding is that the Ten-Tec and Downeast units are both good.  I
have worked several of each on the air, and the owners I've asked seem
happy with them.  As I recall, the Downeast unit runs a bit more power
which is helpful for driving 25-W input amplifiers.

--Rick  K1BQT


From [e-mail] Sat Dec 21 13:27:55 1996
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From: "D. F. Cimperman, Jr." <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: radio mods
Date: 12 Dec 1996 22:55:43 GMT
Organization: eNET Inc. - Internet Service Provider
Lines: 8
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NNTP-Posting-Host: mod121.tusco.net
X-Newsreader: Microsoft Internet News 4.70.1155

anyone have the mods needed to make a 150-162 split micor work on the ham
band?
--
D. F. Cimperman, Jr.
Pager Central
116 North Broadway
New Philadelphia, Ohio.  44663
KB8QHU


From [e-mail] Sat Dec 21 13:27:56 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.misc,rec.radio.amateur.homebrew,rec.radio.amateur.equiptment,rec.radio.swap
Subject: RADIO SHACK MODS PRO 51]
Date: Wed, 18 Dec 1996 13:38:20 -0600
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[e-mail] wrote:
>
> I am interested in getting a scanner thast has the best bang for the
> buck.  A few people have recommended the RS Pro-51.  Presently it is
> under $200.  I was wondering what other people think.  Is this a bargin.
>  Are there any mods for this item.  Can you recomend another scanner our
> source for scanners?  Any help would be greatly appreciated.
>
> Nick Yatko
> [e-mail];


From [e-mail] Sat Dec 21 13:27:57 1996
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From: [e-mail] (Joe Petrocy)
Newsgroups: rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.amateur.misc
Subject: Realistic WX alert radio mods??
Date: Wed, 18 Dec 1996 15:52:55 -0500
Organization: University of Cincinnati
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   Just wondering if anyone has a good idea on how to mod a Realistic WX
alert radio model 12-140. It seems to use one crystal as a reference for
the 3 WX service frequencies. I would like to know if I could drop a
crystal in there to reference something in the 147.00MHz range so I could
tune it to rx 147.060 and others in the area. I am also curious what the
tones are that actually set off the alarm. I would like to set it to go
off if someone does a long-tone zero on our repeater. If I knew what the
tones were that set it off, I could program our repeater controler to emit
those tones after a LTZ.

Anyone ever try this? Does this make sense. Please reply via email and
posting if at all possible.

Thanks,
JWP

--
Joe. That would be me...
----------------------
http://ucunix.san.uc.edu/~petrocjw
[e-mail]


From [e-mail] Sat Dec 21 13:27:58 1996
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From: [e-mail] (Phil Clements)
Newsgroups: rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.amateur.misc
Subject: Re: Realistic WX alert radio mods??
Date: 19 Dec 1996 00:10:34 GMT
Organization: Your Organization
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In article <petrocjw-1812961553150001@192.168.1.2>, [e-mail]
 (Joe Petrocy) says:
>
>   Just wondering if anyone has a good idea on how to mod a Realistic WX
>alert radio model 12-140. It seems to use one crystal as a reference for
>the 3 WX service frequencies. I would like to know if I could drop a
>crystal in there to reference something in the 147.00MHz range so I could
>tune it to rx 147.060 and others in the area. I am also curious what the
>tones are that actually set off the alarm. I would like to set it to go
>off if someone does a long-tone zero on our repeater. If I knew what the
>tones were that set it off, I could program our repeater controler to emit
>those tones after a LTZ.
>
> The tone is 1050 hz. Sorry, can't help you on the crystal freq.

Season's Greetings

Phil, K5PC


From [e-mail] Sat Dec 21 13:28:00 1996
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From: [e-mail](Glenn Sparks)
Newsgroups: rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.amateur.misc
Subject: Re: Realistic WX alert radio mods??
Date: 19 Dec 1996 15:32:11 GMT
Organization: Netcom
Lines: 40
Message-ID: <59bn5r$[e-mail]>
References: <petrocjw-1812961553150001@192.168.1.2>
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X-NETCOM-Date: Thu Dec 19  7:32:11 AM PST 1996
Xref: news1.epix.net rec.radio.amateur.equipment:44669 rec.radio.amateur.homebrew:22191 rec.radio.amateur.misc:121144

I haven't opened up this version of the radio, but I converted several
of the weather cubes that RS used to sell.  All that was required on
them was changing the resistance of the reostat on the tuning circuit,
I don't remember the exact values, but they used a variactor which had
enough range to get down to the 2 meter band.

Glenn Sparks

In <petrocjw-1812961553150001@192.168.1.2> [e-mail]
(Joe Petrocy) writes:
>
>   Just wondering if anyone has a good idea on how to mod a Realistic
WX
>alert radio model 12-140. It seems to use one crystal as a reference
for
>the 3 WX service frequencies. I would like to know if I could drop a
>crystal in there to reference something in the 147.00MHz range so I
could
>tune it to rx 147.060 and others in the area. I am also curious what
the
>tones are that actually set off the alarm. I would like to set it to
go
>off if someone does a long-tone zero on our repeater. If I knew what
the
>tones were that set it off, I could program our repeater controler to
emit
>those tones after a LTZ.
>
>Anyone ever try this? Does this make sense. Please reply via email and
>posting if at all possible.
>
>Thanks,
>JWP
>
>--
>Joe. That would be me...
>----------------------
>http://ucunix.san.uc.edu/~petrocjw
>[e-mail]



From [e-mail] Sat Dec 21 13:28:01 1996
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From: "Ronald D. Lucier" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Resurrect this Amp!
Date: Thu, 19 Dec 1996 16:00:11 -0800
Organization: Optical Hybrids, Inc.
Lines: 10
Message-ID: <[e-mail]>
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I have a circa 1936 homebrew (by W1ABY, SK) Class B push pull amp in need
of resurrection.  Amp was good for 1500W plus plus many years ago.
Resides in a 5 foot high open frame cabinet.  Has all original tubes but
most need to be replaced.  Weighs perhaps 75#.

No shipping obviously.  If you live in New England and are looking for a
challenging boat anchor project, let me know.  Price is very cheap (to be
negotiated).

73 de WA1UWZ


From [e-mail] Sat Dec 21 13:28:01 1996
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From: [e-mail] (Tobbe Frode)
Newsgroups: rec.radio.amateur.homebrew
Subject: RF Transistor data
Date: 12 Dec 96 15:37:30 GMT
Organization: ucsd usenet gateway
Lines: 4
Message-ID: <[e-mail]>
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]

Anyone got the data's on a PT8750 from TRW?
Have found a amp. with this trans, and wonder about the freq, and
powerating.
73 de SM5NPV/Tobbe


From [e-mail] Sat Dec 21 13:28:02 1996
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From: Ed Wolf <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: RS232/TTL for Kenwood
Date: Mon, 16 Dec 1996 12:33:12 -0500
Organization: North American 40+ Touring Riders, Pittsburgh  PA
Lines: 8
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Anyone have info on making up an interface cable for a Kenwood850 to
computer using the Maxis series of chips?
Ifso PLEASE e-mail me. Thanks.
--
          This be from [e-mail]   Pittsburgh.PA    =o&>o
         North American 40+ Touring Riders - Pittsburgh Chapter
                  International Order of Old Bastards
            ARS N3WUE  - 10X, ARRL, BreezeShooter, Springbok


From [e-mail] Sat Dec 21 13:28:03 1996
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From: Peter Lascell <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Schematic Drawing Software For Ham Use?
Date: Wed, 11 Dec 1996 21:21:55 -0800
Organization: In Mind, Inc.
Lines: 7
Message-ID: <[e-mail]>
References: <58hi66$g42$[e-mail]> <[e-mail]>
Reply-To: [e-mail]
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I missed the original posting on this, but...

I receive a demo copy of MicroSim software that does neat drawings.
Look at www.microsim.com and then select DOWNLOAD for free CD-ROM
offer.

[e-mail]


From [e-mail] Sat Dec 21 13:28:04 1996
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From: Jay Craswell <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Schematic Drawing Software For Ham Use?
Date: 9 Dec 1996 17:27:34 GMT
Organization: Dover Research Corp.
Lines: 10
Message-ID: <58hi66$g42$[e-mail]>

BTW the new version of Circad has scanner input!  You can read in old artwork
magazine templetes or even an old PCB.  You still need to copy over it to
make editable PCB files but this is a pretty neat feature.  The only other
program that does this (I think) is Scancad which is a 10K$ program.
Circad is $995 (Unless your a Ham, Ham price=$295)  Drop me an E-Mail if
your interested.  Or check out the WEB site www.holophase.com  I'm starting
to sound like a peanut vendor but heck....  It works!
73
--
73, Jay WB0VNE - AAV5TH


From [e-mail] Sat Dec 21 13:28:05 1996
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From: [e-mail] (CommQuart)
Newsgroups: rec.radio.amateur.homebrew
Subject: sig gen and rf millivoltmeter
Date: 12 Dec 1996 20:43:36 GMT
Organization: AOL http://www.aol.com
Lines: 16
Message-ID: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

Selling;
Clemens SG83C solid state signal generator.  With manual, clean and
working. Calibrated to my HP counter and Boonton 92.  1960's vintage,
uses common semiconductors, easily repaired. Covers 50kc to 54mc
in six ranges. will run on 117 AC, or from internal 9 volt battery.
Calibrated output to over 100k.  fairly stable. AM modulation.
Selling only because I have three and need only two.
$100.00 firm.


Also,  clean Boonton 91 RF millivoltmeter.  Tube version.  Have the
50 ohm termination for the probe for DBM measurements.  Don't
have the probe tip, but easily made.  Have a newer 92AS2 -- need two
like a hole in the head.  asking $90.00, but will dicker on this unit.

Peter


From [e-mail] Sat Dec 21 13:28:06 1996
Newsgroups: rec.radio.amateur.homebrew
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From: [e-mail] (Gary Coffman)
Subject: Re: soldering home brew boards
Message-ID: <[e-mail]>
Reply-To: [e-mail] (Gary Coffman)
Organization: Destructive Testing Systems
References: <[e-mail]>
Date: Fri, 13 Dec 1996 14:28:00 GMT
Lines: 35

In article <[e-mail]> "K.R.Burtchaell" <[e-mail]> writes
:
>
>I am looking for suggestion s on soldering homebrew pcbs.Usually just a
>couple of ICs chip caps and resistors.Is solder paste the way to go?If
>so how to solder?Heat gn or reflow?Looking for suggestions that are
>easily done in the homeworkshop.  73  Ken  W6GHV

Solder paste and a static hot air source are the ideal way to deal
with SMD. A Weller Pyropen Jr makes an excellent static hot air source
with the appropriate shroud, and it is inexpensive. But the problem is
with the solder paste.  It doesn't store well. The brands I've tried
need to be stored in a refrigerator if they are to keep for any reasonable
length of time. So the home constructor tends to buy just a tiny bit at a
time and use it up rapidly. That is inconvienent, and more expensive than
buying in larger quantity.

The technique is pretty simple. Put a tiny dab of solder paste on each
pad (I use a toothpick for this). Place the component on the board
(tweezers are good for this). And give it a shot from the static hot
air source. When the solder melts, its surface tension will pull the
component into alignment with the pads. Remove the hot air and let
cool.

Note that the hot air source needs to be static. An electric heat
gun blows too hard. It'll blow the parts right off the board. And
hot air is corrosive if it retains a high oxygen content. The
combustion products from the Pyropen are depleted in oxygen, so
are much less corrosive.

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 13:28:07 1996
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!van-bc!uniserve!usenet
From: Brian Padgett <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Sound Blaster DTMF Generator
Date: Thu, 19 Dec 1996 06:16:19 -0800
Organization: Amateur Radio VE7ICX
Lines: 7
Distribution: world
Message-ID: <[e-mail]>
NNTP-Posting-Host: chk0101.tvs.net
Mime-Version: 1.0
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Does anybody know of software for a DTMF generator for the SB16 sound
card? I'd like to be able to input numeric strings and have the sound
card output the DTMF's for remotely controlling a repeater controller.

Thanks...

Brian VE7ICX


From [e-mail] Sat Dec 21 13:28:08 1996
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From: Brian Padgett <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Sound Blaster DTMF Generator
Date: Thu, 19 Dec 1996 06:17:52 -0800
Organization: Amateur Radio VE7ICX
Lines: 7
Distribution: world
Message-ID: <[e-mail]>
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Mime-Version: 1.0
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Does anybody know of software for a DTMF generator for the SB16 sound
card? I'd like to be able to input numeric strings and have the sound
card output the DTMF's for remotely controlling a repeater controller.

Thanks...

Brian VE7ICX


From [e-mail] Sat Dec 21 13:28:09 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!news.kei.com!newsfeed.internetmci.com!dciteleport.com!worldnet.att.net!feed1.news.erols.com!chi-news.cic.net!news.suba.com!ultra.qni.com!gwatts
From: Gary Watts <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Sound Blaster DTMF Generator
Date: Thu, 19 Dec 1996 12:10:19 -0600
Organization: Suba Communications
Lines: 37
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: qni.com
Mime-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
To: Brian Padgett <[e-mail]>
In-Reply-To: <[e-mail]>


Brian,
This might not be a programming way of doing it but
you can use the sound blaster to RECORD the touch tones from your phone
and
save that touchtones to several files

You could then
at dos level
type in
play 1.wav
play 4.wav
or
1.voc
or howevery you recorded in in whatever format you recorded it in

I do believe that there was a program that will generate the touchtones
but I cant remember the name of it

Good luck
Gary Wayys  de  N0OXV
Kansas City Mo
81 GL1100I


On Thu, 19 Dec 1996, Brian Padgett wrote:

> Does anybody know of software for a DTMF generator for the SB16 sound
> card? I'd like to be able to input numeric strings and have the sound
> card output the DTMF's for remotely controlling a repeater controller.
>
> Thanks...
>
> Brian VE7ICX
>
>



From [e-mail] Sat Dec 21 13:28:10 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!feed1.news.erols.com!news.idt.net!news.stealth.net!demos!news1.relcom.ru!ns.serpukhov.su!radio.stack.net!vvv
From: [e-mail] (Victor V Voronkov)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Sound Blaster DTMF Generator
Date: 20 Dec 1996 06:21:33 GMT
Organization: Stack Ltd., Pushchino, Russia
Lines: 26
Distribution: world
Message-ID: <59db9d$[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: radio.stack.net
X-Newsreader: TIN [version 1.2 PL2]

Brian Padgett ([e-mail]) wrote:
> Does anybody know of software for a DTMF generator for the SB16 sound
> card? I'd like to be able to input numeric strings and have the sound
> card output the DTMF's for remotely controlling a repeater controller.

> Thanks...

> Brian VE7ICX

Hi Brian!

Check out: http://www.funet.fi/pub/ham/misc/

dtmff100.zip           29-Sep-96 20:57    55K

dtmff100.zip    DTMF & CTCSS generator & decoder & audio analyzer. SB/SB16
---

Interesting, anybody hear about software for making voice mailbox based on
PC, SB and radio ?

73! de RX3DIN  Victor
---
http://www.stack.net/~victor/hamradio/




From [e-mail] Sat Dec 21 13:28:11 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!cpk-news-feed1.bbnplanet.com!uky.edu!usenet
From: [e-mail] (Terry Fugate)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Sound Blaster DTMF Generator
Date: 20 Dec 1996 16:21:39 GMT
Organization: IT
Lines: 16
Message-ID: <59eeej$[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: 128.163.120.82
X-Newsreader: WinVN 0.92.6

In article <[e-mail]>, Brian Padgett <[e-mail]> sa
ys:
>
>Does anybody know of software for a DTMF generator for the SB16 sound
>card? I'd like to be able to input numeric strings and have the sound
>card output the DTMF's for remotely controlling a repeater controller.
>
>Thanks...
>
>Brian VE7ICX
You might want to check out Coolwave.  Syntrillium has a web page where
you can get Coolwave.  Coolwave will allow you to generate single tones,
DTMF or those odd CCIT DTMF like tones.  While Coolwave is "crippled" as
shareware (you can register it for $50), you are allowed to use any 2
of its' many functions as shareware.  I think there are versions for both
Windows 3.1 and Windows 95.
Good luck.


From [e-mail] Sat Dec 21 13:28:11 1996
Newsgroups: rec.radio.amateur.homebrew
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.net!www.nntp.primenet.com!nntp.primenet.com!mr.net!news-out.microserve.net!news-in.microserve.net!news.paonline.com!news.paonline.com!wlio!fred.vobbe
From: [e-mail]
Subject: SOURCE FOR RECTANGULAR CH
Message-ID: <[e-mail]>
Organization: WLIO Television [419.228.8835]
X-Mailer: TBBS/TIGER v1.0
Distribution: world
Date: Wed, 11 Dec 96 15:33:13 -0400
Lines: 15



 Ne> box?  Small, hand operated with a couple of wrenches.  Need
 Ne> rectangular  holes for mounting Waldom/molex connectors.  Cut-out size
 Ne> of  approximately 1.094" X 0.850" and 0.948" X 0.850".  We're going to
 Ne> be  making 100-150 of these so don't suggest drilling/filing/nibbling.
 Ne> Any  other ideas?  Tnx, 73, Scott, N0EDV.

        Check out Greenlee punches, or just browse the Mouser catalog
for one in there.  That's where I got mine for doing Molex connectors.



... [e-mail]  (alternate address: [e-mail])
___ Blue Wave/QWK v2.12


From [e-mail] Sat Dec 21 13:28:13 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!news.indy.net!news
From: [e-mail] (Occolowitz John)
Newsgroups: rec.radio.amateur.homebrew
Subject: Specs. on MECA bidirectional coupler 700-M042?
Date: Mon, 16 Dec 1996 06:33:33 GMT
Organization: IndyNet - Indys Internet Gateway ([e-mail])
Lines: 15
Message-ID: <592fij$[e-mail]>
NNTP-Posting-Host: ip54.slip.indy.net
X-Newsreader: Forte Free Agent 1.0.82

I have a MECA bidirectional coupler marked:

KS-21603 L21
COMCODE: 406715219
Coupler
700-M042

It has a -40dB and a -50dB port.

Does anybody know the specs. for this coupler (frequency range,
average allowable power, directivity)?

Thanks. John KB9MIE.




From [e-mail] Sat Dec 21 13:28:13 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!newsfeed.concentric.net!news-master!news
From: "Bruce Raisley A.R.S. N9ZLE" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: SSTV,FAX,RTTY,CW plus more cheap!
Date: Tue, 17 Dec 1996 21:02:34 -0500
Organization: Skymaster Products
Lines: 3
Message-ID: <[e-mail]>
NNTP-Posting-Host: cnc035036.concentric.net
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.01Gold (Win95; I)

For a very inexpensive multi-mode check out this page

    http://www.cris.com/~n9zle/hc.html


From [e-mail] Sat Dec 21 13:28:14 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.ecn.uoknor.edu!munnari.OZ.AU!ihnp4.ucsd.edu!news1.ucsd.edu!news-mail-gateway
From: [e-mail] (Phil, K6LS)
Newsgroups: rec.radio.amateur.homebrew
Subject: stuff FS/trade.....
Date: 13 Dec 96 08:34:02 GMT
Organization: ucsd usenet gateway
Lines: 14
Message-ID: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]

here is a list of things I have for sale/trade.
I will list them to keep this short.  If you are interested
please mail direct :-)


Ten Tec 6M transverter  #1209 (2m-6m)

A&A Engineering WEFAX w/tuning aid

MFJ  1270CQ 1200,9600b tnc

PacComm PSK-1T  (PSK modem w/TNC)

Thanks 73 de Phil K6LS    [e-mail]


From [e-mail] Sat Dec 21 13:28:15 1996
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!zombie.ncsc.mil!newsgate.duke.edu!agate!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.homebrew
Subject: Re: Suppressor calculations
Date: 9 Dec 1996 17:43:09 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]
X-Newsreader: AOL Offline Reader

In article <[e-mail]>, [e-mail]
(Gary Coffman) writes:

>In a well laid out amplifier using a compact power grid tube, the
>cathode return path can be less than 25 mm (though it is often longer).
>That's a high Z at 3 GHz. The path from the plate to the chassis/grid
>connection point is usually much longer, about 200 mm or even more,
>and that's a high Z at 325 MHz. Capacitive loading can lower that into
>VHF, and that's what we have to deal with via suppressors.
>
>Gary

Hi Gary,

Rich's examples were overexaggerated. He made the L/W ratio of the lead 5
in one case and 2 in another. When the L/W ratio is made lower and lower,
the lead behaves more and more like a continuation of the groundplane. Z
is relatively low regardless of lead length.

We always need to consider the L/D(eff) ratio, and the D to wavelength
ratio.

73 Tom


From [e-mail] Sat Dec 21 13:28:16 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!iol!not-for-mail
From: -Tony-Gallagher- <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: SW rig wanted....
Date: 19 Dec 1996 13:54:15 GMT
Organization: Ireland On-Line
Lines: 15
Message-ID: <59bhe7$jnp$[e-mail]>
NNTP-Posting-Host: dialup-032.limerick.iol.ie
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 1.22KIT (Windows; I; 16bit)

I desperatly need help!!!

Do you a QRP AM transmitter, which will
work PROPERLY in the 49MB???

5-10 watts.

(Maybee you know where I can buy one?)

Help is urgently needed!

Mail Tony:

[e-mail]



From [e-mail] Sat Dec 21 13:28:17 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!news2.mnsinc.com!news1.mnsinc.com!usenet
From: [e-mail] (Brian Carling)
Newsgroups: rec.radio.amateur.homebrew
Subject: SWAP floppies for BA parts
Date: Tue, 17 Dec 1996 07:22:53 GMT
Organization: Glowbugs
Lines: 22
Distribution: inet
Message-ID: <595s9r$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: bry.mnsinc.com
X-Newsreader: Forte Free Agent 1.0.82

I have a quantity of High Density floppy diskettes to trade.
These are 1.44 Meg floppies 3.5" formatted.

I need:
1 watt and 2 watt resistors,
FT-243 crystals for 3500 - 3600 kHz and 7000 - 7150 kHz
Capacitors: MICA, electrolytic etc.
Useful tubes,
Audio transformers.
Old tube equipment, chassis, carcasses etc.
SO-239 and PL-259 connectors

I would like to swap for any of the above items.

E-mail me please at:
[e-mail]

73 from Bry  (((Amateur Radio G3XLQ / AF4K)))
http://www.mnsinc.com/bry
E-mail:  [e-mail]
Home of MEGALIST ham radio files, SWL info. etc. etc.



From [e-mail] Sat Dec 21 13:28:18 1996
Path: news1.epix.net!news3.epix.net!uunet!in2.uu.net!205.252.116.190!feed1.news.erols.com!howland.erols.net!www.nntp.primenet.com!nntp.primenet.com!news1.best.com!nntp1.best.com!shellx.best.com!not-for-mail
From: [e-mail] (Stephen Muther)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: T-44 ATV Retrofit Transmitter
Date: 13 Dec 1996 08:33:42 -0800
Organization: BEST Internet Communications
Lines: 26
Message-ID: <58s0h6$[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: shellx.best.com

In article <[e-mail]>,
ADatGHC <[e-mail]> wrote:
>I am working on a T-44 TV Transmitter.  I understand that this was quite
>popular in 70's.  I have been told that there are articles in QST and
>information in an earlier ARRL Handbook.  I would also like to get copy of
>the schematic. I would  welcome any comments and discussion on the T-44
>and video modulators.
>
>
>
>Thanks,
>
>Andrew KB3APR
>

Much of the work done at that time was for black and white video.
It is unclear if the T-44 output circuit is broad enough to pass
color.   Also, keep in mind that unless you use a VSB filter on
the output of transmitter, you will be running double sideband
with an occupied bandwidth of over 9 MHz!  Make sure you don't
bother any existing users of the band.

Good Luck

Steve M. WF6R



From [e-mail] Sat Dec 21 13:28:19 1996
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] (ADatGHC)
Newsgroups: rec.radio.amateur.homebrew
Subject: T-44 ATV Retrofit Transmitter
Date: 13 Dec 1996 14:21:43 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 am working on a T-44 TV Transmitter.  I understand that this was quite
popular in 70's.  I have been told that there are articles in QST and
information in an earlier ARRL Handbook.  I would also like to get copy of
the schematic. I would  welcome any comments and discussion on the T-44
and video modulators.



Thanks,

Andrew KB3APR



From [e-mail] Sat Dec 21 13:28:19 1996
From: "Geert Pirens" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Technical Information wanted on a ICOM IC-2E handheld portabel.
Date: 18 Dec 1996 21:34:22 GMT
Organization: Globe Internetworking
Lines: 19
Message-ID: <01bbed2b$8f1c6500$73b630ce@206.48.181.1.206.48.177.1>
NNTP-Posting-Host: ip115.z011.glo.be
X-Newsreader: Microsoft Internet News 4.70.1157
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.cybernet.dk!netcom.net.uk!news-lond.gsl.net!news.gsl.net!news-paris.gsl.net!news.gsl.net!news.glo.be!usenet

Hello,


Can someone help me on some Technical information of a ICOM IC-2E  2meter
portable?

Also I want to know haw long I mus charge the batery and with wath charger?
voltage? mA?

All information is welkom.

On the ICOM homepage is this product information not availeble anymore.

Thanks in advance!!

73!

Geert Pirens



From [e-mail] Sat Dec 21 13:28:21 1996
Newsgroups: rec.radio.amateur.homebrew
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!news.texas.net!news.kei.com!newsfeed.internetmci.com!metro.atlanta.com!news.radio.org!wa4mei!ke4zv!gary
From: [e-mail] (Gary Coffman)
Subject: Re: Technical Information wanted on a ICOM IC-2E handheld portabel.
Message-ID: <[e-mail]>
Reply-To: [e-mail] (Gary Coffman)
Organization: Destructive Testing Systems
References: <01bbed2b$8f1c6500$73b630ce@206.48.181.1.206.48.177.1>
Date: Sat, 21 Dec 1996 02:21:54 GMT
Lines: 25

In article <01bbed2b$8f1c6500$73b630ce@206.48.181.1.206.48.177.1> "Geert Piren
s" <[e-mail]> writes:
>Can someone help me on some Technical information of a ICOM IC-2E  2meter
>portable?

The IC-2E is the European version of the IC-2AT.

>Also I want to know haw long I mus charge the batery and with wath charger?
>voltage? mA?

If it has the stock battery, a BP-3, charge at 40 mA with a constant
current charger through the jack in the side of the battery. You can also
bottom charge the battery with a BC-35 drop in charger. Icom also
sold rapid charge batteries for this radio, BP-2, BP-8, etc. If you
have one of these, you can charge at a much higher rate. The BC-35
will automatically sense what type of battery you've inserted and
charge at the proper rate. Aftermarket companies still offer batteries
and chargers for this radio. The same batteries also work on the
Radio Shack radios.

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 13:28:21 1996
Path: news1.epix.net!news3.epix.net!uunet!in2.uu.net!204.178.176.27!hunter.premier.net!feed1.news.erols.com!howland.erols.net!news-peer.gsl.net!news.gsl.net!news-lond.gsl.net!news.gsl.net!news.glo.be!usenet
From: "Geert Pirens" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Technican information wanted on ICOM  IC-BP3 batery pack
Date: 20 Dec 1996 19:58:40 GMT
Organization: Globe Internetworking
Lines: 11
Message-ID: <01bbeeaf$8b7049a0$LocalHost@206.48.181.1.206.48.177.1>
NNTP-Posting-Host: ip112.z011.glo.be
X-Newsreader: Microsoft Internet News 4.70.1157

Hello


Can someone tell me more of the ICOM IC-BP3 battery pack?

I only know that I can charge this pack with 13.8 volt, but haw long must I
charge this pack ?

And what for charger do I need charge this type battery pack? 13.8 v / ?mA
????????



From [e-mail] Sat Dec 21 13:28:22 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!newsfeed.internetmci.com!news.cmc.net!usenet
From: [e-mail] (Gary Fiber)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Technican information wanted on ICOM  IC-BP3 batery pack
Date: Sat, 21 Dec 1996 16:35:35 GMT
Organization: Chambers Multimedia Connection
Lines: 21
Message-ID: <59h3r2$[e-mail]>
References: <01bbeeaf$8b7049a0$LocalHost@206.48.181.1.206.48.177.1>
Reply-To: [e-mail]
NNTP-Posting-Host: pm2-5.edmonds.cmc.net
X-Newsreader: Forte Free Agent 1.0.82

"Geert Pirens" <[e-mail]> wrote:

>Hello


>Can someone tell me more of the ICOM IC-BP3 battery pack?

>I only know that I can charge this pack with 13.8 volt, but haw long must I
>charge this pack ?

>And what for charger do I need charge this type battery pack? 13.8 v / ?mA
>????????

The BP-3 is a 8.4 volt 250 mAh pack.  You need to use a 13.8 volt source that
is over 100 mAh to cjarge the battery.  It takes 15 hours to reach a full
charge.

Gary





From [e-mail] Sat Dec 21 13:28:24 1996
Newsgroups: rec.radio.amateur.equipment,rec.radio.amateur.homebrew
Path: news1.epix.net!news3.epix.net!uunet!in2.uu.net!205.252.116.190!feed1.news.erols.com!howland.erols.net!swrinde!cssun.mathcs.emory.edu!news.radio.org!wa4mei!ke4zv!gary
From: [e-mail] (Gary Coffman)
Subject: Re: Ten-Tec 2 meter FM transceiver
Message-ID: <[e-mail]>
Reply-To: [e-mail] (Gary Coffman)
Organization: Destructive Testing Systems
References: <01bbdfad$a66e3fc0$[e-mail]> <[e-mail]> <[e-mail]>
Date: Wed, 11 Dec 1996 19:15:39 GMT
Lines: 63
Xref: news1.epix.net rec.radio.amateur.equipment:44211 rec.radio.amateur.homebrew:21988

In article <[e-mail]> [e-mail] (Ed Burress)
writes:
>In article <[e-mail]> [e-mail] (Gary
 Coffman) writes:
>snip
>>
>>OTOH, there is 9.6 kb packet. This *can* work through some, a
>>very few, voice grade radios, and many amateurs try. But most
>>of the so-called "9600 baud ready" voice radios are *not* in fact
>>suitable for 9600 baud operation. They have a connector labeled
>>
>snip
>
>Has anyone built the Ramsey 440 MHz transciever, and used it successfully
>for 9600 baud packet operation?  Did it work as advertised, or are there
>mods necessary to get it to work?  Their catalog says "9600 - no problem".
>Does that mean "works fine, no problem" or "no problem, not a chance"?
>Anyone use one of these as the basis for a repeater? Can you use the
>Tx and Rx side at the same time? I suspect that the synthesizer can only
>handle one side at a time, but I've never even seen one of these rigs.
>Anybody?

I haven't built the 440 rig, but I did build the 2m rig. The modulation
is just summed into the PLL error loop, and if you've been following the
9600 baud threads, you know that's not going to work correctly.

The radio sweeps the VCO to the various receive and transmit offsets
by mixing offset reference crystal oscillators with a sample of the
VCO in the PLL mixer and feeding that to the PLL chip to generate the
loop error voltage to steer the VCO to the proper frequency. You can't
use it duplex or split it.

The 2m radio had a *number* of design flaws (I can't claim the inability
to do 9600 properly is a design flaw since most other synthesized radios
share it, and it doesn't affect ordinary voice use). But for example, it
will transmit with the PLL out of lock, a definite no-no. And receive
sensitivity was much worse than specified unless modified from the way
the instructions tell you to build it. And the PA would go spurious if
you tuned it according to the instructions in the manual (you can tune
it clean with the aid of a spectrum analyzer, though you might have to
settle for about 3 watts out). There were a number of fixes to its
various problems which were posted here when it first came out.

I understand that the design has been revised since the first release.
I can't say if any or all of the problems noted in the first units
have been resolved because I haven't seen one of the new units. But
unless they have been, you don't want this radio except as a learning
experience on how *not* to design a radio. There were also problems
with component quality. The first radios were sent out with reference
crystals which would not net onto frequency. You had to modify the
reference oscillators to get them on frequency. Now some of this
may be attributed to teething problems of a new product, but most
of it is just typical Ramsey.

If you want a transmitter and receiver you can build from kits
which will work for 9600 baud, buy the Hamtronics kits. Their
quality isn't wonderful either, but at least the design is sound,
and they will usually work as advertised after a bit of debugging.

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 13:28:26 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.net!news.idt.net!news.sprintlink.net!news-pen-16.sprintlink.net!realtime.net!news
From: [e-mail] (Kent Farnsworth)
Newsgroups: rec.radio.amateur.equipment,rec.radio.amateur.homebrew
Subject: Re: Ten-Tec 2 meter FM transceiver
Date: Fri, 13 Dec 1996 02:48:48 GMT
Organization: Real/Time Communications Internet customer posting
Lines: 39
Message-ID: <58qgsq$[e-mail]>
References: <01bbdfad$a66e3fc0$[e-mail]> <[e-mail]>
NNTP-Posting-Host: apm0-52.realtime.net
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Xref: news1.epix.net rec.radio.amateur.equipment:44259 rec.radio.amateur.homebrew:22018

Hello:
I missed the first of this thread, but here goes.

[e-mail] (Gary Coffman) wrote:

>In article <01bbdfad$a66e3fc0$[e-mail]> "Trish Cowgar" <tri
[e-mail]> writes:
>>Does anyone have any input on the Ten-Tec 2 meter FM Transceiver that you
>>assemble from a kit?

You will really like building this kit. It should not be your first
kit, as the unit is fairly complex.

I love my TT 2 meter. I always get good reports on sound quality, and
the 15 memories are enough for me. I only talk on three anyway.

The major problem in my book is the lack of scanning capability. I
talked to Ten Tech, and asked them for the processor code, so I could
implement scanning. They refused, but promised that they are working
on an upgrade to allow scanning. I am impressed! This feature alone
will make their radios in the very nice catagory. I have other
Japanese radios with so many features that you can't use, unless you
have the manual in your lap. The Ten Tech units are nice, simple, and
well designed.

The audio of my TT 2m rig is equal to or better than any other radio
on the market.

The tuneup process is critical to the proper input sensitivity of the
unit. If you buy one, I would recommend borrowing, or renting a signal
generator, unless you have a very good busy repeater nearby. I got the
sensitivety down to .18uv by using a signal generator to tweak the
coils.

Have fun!

Kent - de KC5WPW





From [e-mail] Sat Dec 21 13:28:27 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: TL922 Arcing/Oscillating? Help with diagnosis?
Date: 9 Dec 1996 17:43:06 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]
(Gary Coffman) writes:

>
>Rather than dissipate a 100 watts in a resistor, it often makes
>sense to dissipate a fraction of a watt in the pre-driver of the
>rig instead. Adding a small switched attenuator here can allow
>you to set output power virtually anywhere you like, and have
>confidence it will stay there. If you want speech compression,
>a form of distortion, then you can add that too. For myself, I
>think linear amplifiers should perform linearly, and not be
>used as non-linear distortion generators.

Gary's idea is a good one, it satisfies the need to limit the gain when
power is reduced.

There should be enough head room above the attenuator's power setting to
allow good linearity, that's why I prefer external fixed ALC voltage to
any attenuator if possible. Fixed external ALC reduces the chance of
saturation in a low level stage, if that method can be used.

This is also why the linear amplifier driving requirement should as close
to the exciters rated power as possible. Using a 150 watt capable PA with
a 50 watt drive PA (or tuning your PA with 50 watts) is asking for trouble
with arcs, sparks, and splatter.

73 Tom


From [e-mail] Sat Dec 21 13:28:28 1996
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From: Kovacs Karoly <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: TR-7 modifications
Date: Wed, 18 Dec 1996 12:45:22 +0100
Organization: Siemens AG Austria
Lines: 6
Message-ID: <[e-mail]>
NNTP-Posting-Host: firix.siemens.at
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Can anybody send me a copy from the COMMUNICATIONS QUARTERLY Summer92
in article "TR-7 MODIFICATIONS".

If yes please e-mail DIRECT me then I will write my address & others...

Karoly, HA2EOF


From [e-mail] Sat Dec 21 13:28:29 1996
Path: news1.epix.net!news3.epix.net!uunet!in3.uu.net!204.127.130.5!worldnet.att.net!newsadm
From: woody white <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: TR7 modifications
Date: Fri, 20 Dec 1996 19:09:29 -0800
Organization: http://www.geocities.com/capecanaveral/3722
Lines: 18
Message-ID: <[e-mail]>
References: <[e-mail]>
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X-Mailer: Mozilla 2.01E (Win16; I)

Anyone know what mods were covered?   _Woody_  , TR7 owner.

Kovacs Karoly wrote:
>
> Can anybody send me a copy from the COMMUNICATIONS QUARTERLY Summer92
> in article "TR-7 MODIFICATIONS".
>
> If yes please e-mail DIRECT me then I will write my address & others...
>
> Karoly, HA2EOF

--
de  Woody (WB4QXE) -  [e-mail]
Electron Microscopist/Microanalysist,
Ham radio "homebrewer", shade tree mechanic,
'90 Nissan 240SX, wish still had my Mcycle too!
http://www.geocities.com/capecanaveral/3722
.


From [e-mail] Sat Dec 21 13:28:30 1996
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From: Kovacs Karoly <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: TR7 modifications
Date: Fri, 20 Dec 1996 08:51:10 +0100
Organization: Siemens AG Austria
Lines: 6
Message-ID: <[e-mail]>
NNTP-Posting-Host: firix.siemens.at
Mime-Version: 1.0
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X-Mailer: Mozilla 3.0Gold (X11; I; HP-UX A.09.05 9000/715)

Can anybody send me a copy from the COMMUNICATIONS QUARTERLY Summer92
in article "TR-7 MODIFICATIONS".

If yes please e-mail DIRECT me then I will write my address & others...

Karoly, HA2EOF


From [e-mail] Sat Dec 21 13:28:31 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!132.175.109.6!news.sandia.gov!tesuque.cs.sandia.gov!SantaFe!usenet
From: [e-mail] (Jim Potter)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Transformer wanted.
Date: Wed, 18 Dec 1996 15:49:48 GMT
Organization: JP Accelerator Works, Inc.
Lines: 17
Message-ID: <[e-mail]>
References: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: dial150.roadrunner.com
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Newsreader: Forte Agent .99g/32.339

[e-mail] wrote:

>Hi, Im looking for a transformer with
>350vtct@110ma;6.3vt@4.5a;5vt@3a...Also a 10.5hy [e-mail] ideas
>or sugestions? thanks.R Lloyd KE6ONN.
>
I used to get those from old television sets.  (1950-1960) Maybe there
are some still around.

Jim


James M. Potter, President              TEL: [phone]
JP Accelerator Works, Inc.              FAX: [phone]
2245 47th Street                        EMAIL: [e-mail]
Los Alamos, NM 87544-1604               URL: http://www.jpaw.com



From [e-mail] Sat Dec 21 13:28:31 1996
Path: news1.epix.net!news3.epix.net!uunet!in2.uu.net!204.178.176.27!hunter.premier.net!feed1.news.erols.com!howland.erols.net!swrinde!ihnp4.ucsd.edu!news1.ucsd.edu!news-mail-gateway
From: [e-mail] (Tobbe Frode)
Newsgroups: rec.radio.amateur.homebrew
Subject: Transistor-data wanted
Date: 21 Dec 96 09:54:09 GMT
Organization: ucsd usenet gateway
Lines: 7
Message-ID: <[e-mail]>
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]

Looking for data on a PT8750 from TRW. It's an RF-power.
Found it in a commercial power -module and would like to know the
freq and output power. (know that this kind of amps where made for
70, 160,450 MHz)

73 and a Merry X-mas to all !
// SM5NPV - Tobbe


From [e-mail] Sat Dec 21 13:28:32 1996
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From: [e-mail] (David and Shari Abell)
Newsgroups: rec.radio.amateur.homebrew
Subject: Two meter reciever
Date: 17 Dec 96 06:20:33 GMT
Organization: ucsd usenet gateway
Lines: 11
Message-ID: <[e-mail]>
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]

I am looking for a simple, single frequency FM reciever schematic to
accompany my two meter transmitter project. Thanks in advance for the help. 73
's
____________________________________________________________________

With warm aloha,
D A V I D  A N D  S H A R I  A B E L L
P.O. Box 974
Kalaheo, Kauai, Hawaii 96741
e-mail: [e-mail]
____________________________________________________________________



From [e-mail] Sat Dec 21 13:28:33 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]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Two meter reciever
Date: 17 Dec 1996 18:00:22 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]
X-Newsreader: AOL Offline Reader

In article <[e-mail]>, [e-mail]
(David and Shari Abell) writes:

>
>I am looking for a simple, single frequency FM reciever schematic to
>accompany my two meter transmitter project. Thanks in advance for the
help.
>73's

HI
Some older, 1976,  ARRL handbooks had a small board 2M receiver project.


Carl
The2x4
N9EFJ


From [e-mail] Sat Dec 21 13:28:34 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!worldnet.att.net!uunet!in2.uu.net!132.175.109.6!news.sandia.gov!tesuque.cs.sandia.gov!corvette.mst6.lanl.gov!newshost.lanl.gov!usenet
From: Jim Devenport <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Two meter reciever
Date: Tue, 17 Dec 1996 14:16:14 -0700
Organization: Los Alamos National Laboratory
Lines: 16
Message-ID: <[e-mail]>
References: <[e-mail]>
Reply-To: [e-mail]
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Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.0 (Win95; I)
To: David and Shari Abell <[e-mail]>

David and Shari Abell wrote:
>
> I am looking for a simple, single frequency FM reciever schematic to
> accompany my two meter transmitter project. Thanks in advance for the help.
73's
<snip>
Ramsey Electronics sells a varactor-tuned 2 meter FM receiver kit for
about 29.95, it can easily be converted to crystal control, and works
well as is for a usable 2 meter ham receiver with squelch etc.  This is
barely above the cost of buying the parts themselves.
--
|-------------------------------------------------------|
|Jim Devenport  WB5AOX                                  |
|All Standard Disclaimers Disclaimed                    |
|My views rarely (if ever) reflect those of my employers|
|http://nis-www.lanl.gov/~jdport/                       |
|-------------------------------------------------------|


From [e-mail] Sat Dec 21 13:28:35 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.net!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!surfnet.nl!news.unisource.nl!xs4all!xs4all!usenet
From: [e-mail] (johan)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Two meter reciever
Date: Thu, 19 Dec 1996 02:43:50 GMT
Organization: XS4ALL, networking for the masses
Lines: 18
Message-ID: <599ahq$[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ztm04-05.dial.xs4all.nl
X-XS4ALL-Date: Wed, 18 Dec 1996 18:44:26 MET
X-Newsreader: Forte Free Agent 1.0.82

[e-mail] (David and Shari Abell) wrote:
try a 3362
it is made by motorola and has everyting in it
good luck with it

>I am looking for a simple, single frequency FM reciever schematic to
>accompany my two meter transmitter project. Thanks in advance for the help. 7
3's
>____________________________________________________________________

>With warm aloha,
>D A V I D  A N D  S H A R I  A B E L L
>P.O. Box 974
>Kalaheo, Kauai, Hawaii 96741
>e-mail: [e-mail]
>____________________________________________________________________





From [e-mail] Sat Dec 21 13:28:36 1996
From: [e-mail]
Subject: UHF/VHF books
Date: Sat, 21 Dec 1996 03:16:11 GMT
Message-ID: <[e-mail]>
X-Newsreader: Forte Free Agent 1.1/32.230
Newsgroups: rec.radio.amateur.homebrew
Lines: 5
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!newsfeed.internetmci.com!luzskru.technetplus.net

Can anybody point me at some good reference books for UHF/VHF design
techniques.  I'm particularly interested in the gigahertz range
circuitry.  Thanks

Wade, N3JLA

[e-mail]


From [e-mail] Sat Dec 21 13:28:36 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] (JohnsonHE)
Newsgroups: rec.radio.amateur.homebrew
Subject: Vuedata PS950 Scope
Date: 15 Dec 1996 02:41:59 GMT
Organization: AOL http://www.aol.com
Lines: 8
Message-ID: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

Anybody with a manual on the above 50 MHz scope? I have one with no sweep.
Might be bad tube and beyond repair, but might just be sweep. Would like
to pay for xerox, rent manual till I xerox it or whatever other
arrangements can be worked out.

Reply E-mail direct

W4ZCB


From [e-mail] Sat Dec 21 13:28:37 1996
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] (lrb)
Newsgroups: rec.radio.amateur.homebrew
Subject: WANTED TUBES
Date: Fri, 13 Dec 1996 06:28:25 GMT
Organization: MindSpring Enterprises, Inc.
Lines: 4
Message-ID: <58qt61$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: user-168-121-69-205.dialup.mindspring.com
X-Server-Date: 13 Dec 1996 06:30:25 GMT
X-Newsreader: Forte Free Agent 1.0.82

Looking for tubes, especially 8908.  Does anyone know where to find
them ?




From [e-mail] Sat Dec 21 13:28:38 1996
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From: "David Little" <[e-mail]>
Newsgroups: rec.radio.swap,rec.radio.amateur.equipment,rec.radio.amateur.misc,rec.radio.amateur.boatanchors,rec.radio.amateur.homebrew,rec.radio.cb
Subject: Re: Wanted: 10mSSB convertion info for Cobra 134.
Date: 17 Dec 1996 19:01:38 GMT
Organization: Sprynet News Service
Lines: 29
Message-ID: <01bbec4c$678a3100$[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ad28-246.compuserve.com
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> I'm looking for information or articles for converting a Cobra 134 CB to
> 10m SSB.
>
Allen,
        do a search for "CB Radio".  Look at Left Coast CB abd it's links.
You will find an abundance of info on PLL unlocks.  If you know the PLL, I
may be able to provide some info for you.  Getting the fo's is the easy
part....Broadbanding the receive and transmit capabilities requires some
time, effort and substitutions.  There are "tricks" such as adding more
broad varactor diodes in the vco and ssb circuits, paralleling unused
sections of IF transformers, changing the value of the synth crystals, etc.
 Some PLL's and circuit board combos are better than others, and the Cobra
usually uses a Uniden board with either a 8719 or 8734 PLL IC.

     The best authority is Lou Franklin of CB Cint International.  You can
contact him at [e-mail]  .
He has written variouis volumes of info covering whatever level of info you
care to get into.  He is also a ham and has been hombrewing and studying
PLL circuits since their introduction to the retail market.

     You will also have to consider adding FM (relatively easy) and
repeater offsets.  It is a good project, and even if it doesn't perform as
well as a "store bought" rig, the experience that you will get has a value
that no price can be set on.

Good Luck
73
David KD4NUE


From [e-mail] Sat Dec 21 13:28:40 1996
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From: [e-mail] (Massoud Ajami)
Newsgroups: rec.radio.amateur.homebrew,sci.electronics.design
Subject: Re:  Wanted: Tips for constructing water cooled load
Date: Wed, 18 Dec 1996 22:21:32 GMT
Organization: San Diego State University
Lines: 36
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: 130.191.227.22
Xref: news1.epix.net rec.radio.amateur.homebrew:22158 sci.electronics.design:28369

X-no-archive: yes
In article <[e-mail]> [e-mail] (Jim Potter)
 writes:
>From: [e-mail] (Jim Potter)
>Subject: Wanted: Tips for constructing water cooled load
>Date: Wed, 18 Dec 1996 19:02:56 GMT

>I am wanting to build a non-inductive 8 kW load for 300 kHz, CW.  The
>application is power inverter testing, not commercial resale. My
>current thinking is to use Carborundum resistors with water cooling. I
>believe I can get away with 10 X rating with water cooling.

>I am planning on using three 1" X 18",  680 ohm resistors in parallel
>to get 227 ohms. (Unfortunately I'm not dealing with a 50 ohm system
>and I prefer not to have to mess with a matching network since I may
>want to use this at any frequency from 200 kHz to 400 kHz.) One end of
>the load is grounded. The other will see a not quite sinusoidal
>waveform of about 2 kV peak. The water would be flowing tap water.

>The questions are:

>Can I really get 10 X rating?
>Do I need water on both inside and out?
>Are there any problems with connections immersed in water?
>What is a good way to connect the water to the resistors?

>Any construction tips would be appreciated.

Water would conduct at that voltage. Get transformer oil and immerse the
load in it, and then, use copper tubing coiled in the oil, with cold water
running in it. That would cool the oil and transfer the heat out. The amount
of power that you can comsume in the load, depends on how fast you can cool
the oil.

You always can match it as a parallel circuit for the required frequency.




From [e-mail] Sat Dec 21 13:28:41 1996
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From: [e-mail] (Jim Potter)
Newsgroups: rec.radio.amateur.homebrew,sci.electronics.design
Subject: Re: Wanted: Tips for constructing water cooled load
Date: Thu, 19 Dec 1996 08:09:06 GMT
Organization: JP Accelerator Works, Inc.
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[e-mail] (Massoud Ajami) wrote:


>
>Water would conduct at that voltage. Get transformer oil and immerse the
>load in it, and then, use copper tubing coiled in the oil, with cold water
>running in it. That would cool the oil and transfer the heat out. The amount
>of power that you can comsume in the load, depends on how fast you can cool
>the oil.
>
>You always can match it as a parallel circuit for the required frequency.
>
>
Water is not as good a conductor as you might imagine. Some of the
most compact 50 ohm rf dummy loads have ordinary tap water directly on
the load resistor. I don't know the details of how it is constructed,
but I own a 5 kW 50 ohm load mad that way. The load I need for this
project is about 250 ohms.

Someone suggested a transformer to match a 50 ohm load. I'm looking at
that possibility. It won't be cheap, but it looks cost competitive
with both a custom resistive load and a matching network, even
considering that I have to buy another 5 kW 50 ohm load.

Thanks for your input.

Jim Potter


James M. Potter, President              TEL: [phone]
JP Accelerator Works, Inc.              FAX: [phone]
2245 47th Street                        EMAIL: [e-mail]
Los Alamos, NM 87544-1604               URL: http://www.jpaw.com



From [e-mail] Sat Dec 21 13:28:42 1996
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From: "Ayman El-Khashab" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew,sci.electronics.design
Subject: Re: Wanted: Tips for constructing water cooled load
Date: 19 Dec 1996 06:11:07 GMT
Organization: University of Texas at Austin
Lines: 23
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Jim Potter <[e-mail]> wrote in article
<[e-mail]>...
: I am wanting to build a non-inductive 8 kW load for 300 kHz, CW.  The
: application is power inverter testing, not commercial resale. My
: current thinking is to use Carborundum resistors with water cooling. I
: believe I can get away with 10 X rating with water cooling.


You can use a dielectric fluid to cool the system, basically, you
would run this fluid through the resistors and possibly on the outside
as well (it's obviously non-conductive) and then the heat generated
will evaporate the fluid which is then run through a heat exchanger and
a pump which generates enough pressure to spray the fluid on the
resistors.

FYI: the fluid is a derivative of freon but with a much lower boiling
point so the compresser and evaporator is unneccesary.  In either case,
because the fluid is converted to a gas its heat transfer capabilities
are exceptional.

-  ayman


From [e-mail] Sat Dec 21 13:28:43 1996
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From: Paul Mathews <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew,sci.electronics.design
Subject: Re: Wanted: Tips for constructing water cooled load
Date: Thu, 19 Dec 1996 08:34:29 -0800
Organization: Aengineering Co.
Lines: 28
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Jim Potter wrote:
>
> I am wanting to build a non-inductive 8 kW load for 300 kHz, CW.  The
> application is power inverter testing, not commercial resale. My
> current thinking is to use Carborundum resistors with water cooling. I
> believe I can get away with 10 X rating with water cooling.
......<snip>
>
> Any construction tips would be appreciated.
>
> Thanks.
.....


There are lots of reasons why oil is the preferred coolant for such
applications.  Here are a few:

1. Corrosive characteristics of hot H20
2. Conductive " " "
3. Energy storage " " steam
4. Very high dielectric constant of H20

--

Paul Mathews, consulting engineer
AEngineering Co.
[e-mail]
non-contact sensing and optoelectronics specialists


From [e-mail] Sat Dec 21 13:28:44 1996
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From: Peter Lascell <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew,sci.electronics.design
Subject: Re: Wanted: Tips for constructing water cooled load
Date: Thu, 19 Dec 1996 22:37:16 -0800
Organization: In Mind, Inc.
Lines: 17
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> waveform of about 2 kV peak. The water would be flowing tap water.
>
> The questions are:
> Do I need water on both inside and out?
> Are there any problems with connections immersed in water?

Seems like transformer oil would be better and immerse the resistor
assemble totally.  You didn't say if this needed to be a continuous duty
power rating.  The old Heathkit Cantenna dummy load did this trick.

If you use water that will get to the connections, I think you will need
distilled water so it will not conduct the electrical current, much like
the high power broadcast transmitters with water cooled finals and
plastic hoses.

Pete Lascell
[e-mail]


From [e-mail] Sat Dec 21 13:28:45 1996
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From: lprevo@rulhe1 (Leendert Prevo)
Newsgroups: rec.radio.amateur.homebrew,sci.electronics.design
Subject: Re: Wanted: Tips for constructing water cooled load
Followup-To: rec.radio.amateur.homebrew,sci.electronics.design
Date: 20 Dec 1996 12:48:45 GMT
Organization: Leiden University, The Netherlands
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Jim Potter ([e-mail]) wrote:
: I am wanting to build a non-inductive 8 kW load for 300 kHz, CW.  The
.............


It may be possible to use 2 plates, immersed in water, as the contacts
of a resistor. As the water gets hot and evaporates, the barrel has to
be refilled after some time.
leendert prevo



From [e-mail] Sat Dec 21 13:28:47 1996
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From: [e-mail] (Jim Potter)
Newsgroups: rec.radio.amateur.homebrew,sci.electronics.design
Subject: Re: Wanted: Tips for constructing water cooled load
Date: Fri, 20 Dec 1996 20:49:38 GMT
Organization: JP Accelerator Works, Inc.
Lines: 31
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lprevo@rulhe1 (Leendert Prevo) wrote:

>Jim Potter ([e-mail]) wrote:
>: I am wanting to build a non-inductive 8 kW load for 300 kHz, CW.  The
>.............
>
>
>It may be possible to use 2 plates, immersed in water, as the contacts
>of a resistor. As the water gets hot and evaporates, the barrel has to
>be refilled after some time.
>leendert prevo
>
Thanks for the suggestion. I once made a waveguide load for a few kW
at 425 MHz with a tilted waveguide partially filled with water. It
worked great. I hadn't thought of it here because one of the waveguide
load was that it was tapered over may wavelengths and didn't require
complicated adjustments to get a good match.

I also remember that the father of a friend of mine told me about make
dimmers for 1 kW lights in the 30's by dipping 2 electrodes into a
container of salt water. And, of course, most of us are familiar with
the water "vaporizers" that are just two electrodes in a container of
slightly salt water. So, it might work.

Jim

James M. Potter, President              TEL: [phone]
JP Accelerator Works, Inc.              FAX: [phone]
2245 47th Street                        EMAIL: [e-mail]
Los Alamos, NM 87544-1604               URL: http://www.jpaw.com



From [e-mail] Sat Dec 21 13:28:47 1996
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From: "msimons" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: WANTED:, D2MAC CODER !!!
Date: 13 Dec 1996 21:32:30 GMT
Organization: Internet Access Eindhoven, the Netherlands
Lines: 14
Message-ID: <01bbe945$b71f07e0$344697c2@marc'scomputer>
References: <[e-mail]>
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Peter,
It might be interesting for you to contact Jan de Bie at CinevideoGroep in
Almere-Haven. He is one of the pioneers in D2MAC stuff, and I am sure he
can send you to the right spot.
Good luck!

peter smit <[e-mail]> wrote in article
<[e-mail]>...
> I would like to buy a used d2mac coder (no decoder) for ATV
> Please if you have any information contact me.
>
> Peter Smit
> PE1CQS
>


From [e-mail] Sat Dec 21 13:28:48 1996
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From: [e-mail] (Slawek Goetz)
Newsgroups: rec.radio.amateur.homebrew
Subject: Where can I get a crystal 53.000-54.000Mhz?
Date: 16 Dec 1996 02:27:10 GMT
Organization: California State University at Fullerton
Lines: 13
Message-ID: <592c1u$705$[e-mail]>
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Hi, I am in the process of building my robot which is going to be
remotly controlled by a computer. I would like to use one of the 10 channels
between 53.000-54.000 or 50.800-50.980. But I have a serously problem,
I can not find a crystal for any of the 10 channels. I would really
apprciate if someone told me where I can get such a beaty.



Thank you

e-mail:    [e-mail]

KD6OAD/KT


From [e-mail] Sat Dec 21 13:28:49 1996
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From: [e-mail] (Brian Carling)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Where can I get a crystal 53.000-54.000Mhz?
Date: Wed, 18 Dec 1996 20:38:49 GMT
Organization: Glowbugs
Lines: 28
Distribution: inet
Message-ID: <599va3$[e-mail]>
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x-no-archive: yes
[e-mail] (Slawek Goetz) whistled a happy tune like:

|>Hi, I am in the process of building my robot which is going to be
|>remotly controlled by a computer. I would like to use one of the 10
channels
|>between 53.000-54.000 or 50.800-50.980. But I have a serously problem,
|>I can not find a crystal for any of the 10 channels. I would really
|>apprciate if someone told me where I can get such a beaty.



|>Thank you

|>e-mail:    [e-mail]

|>KD6OAD/KT
Here;s where you can get a GREAT list of CRYSTALS sources:

http://www.mnsinc.com/bry/hamfiles.htm
Enjoy!


73 from Bry  (((Amateur Radio G3XLQ / AF4K)))
http://www.mnsinc.com/bry
E-mail:  [e-mail]
Home of MEGALIST ham radio files, SWL info. etc. etc.



From [e-mail] Sat Dec 21 13:28:50 1996
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From: [e-mail] (Melissa & Jim)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Where Hi Voltage Zeners?
Date: Fri, 13 Dec 1996 00:05:02 GMT
Organization: University of Wisconsin, System Administration
Lines: 36
Message-ID: <58q6oh$[e-mail]>
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[e-mail] wrote:

>In <58esuq$[e-mail]>, [e-mail] (Terry Simonds) writes
:
>>
>>I have a Heathkit scope (IO-104) that has managed to eat a string of
>>275V 3-mA Zeners. Anybody out there have a source for such a beast?
>>
>>Thanks
>>
>>
>> Hi Terry,
>
>    Try a place called either Surplus Salvage or Surplus Supply a call. They
are
> in Benton Harbor, Michigan. They have/had a lot of the old Heath parts. I
> don't have their number, but 1-616-555-1212 outta get you close. Good Luck

I had just such a repair on a Heath scope years ago and spent quite a
while looking for alternate sources of HV diodes.  In the end I could
find nothing except for Heath above 200 V.  Keep in mind that it is
perfectly legitimate to add a few more diodes to your string and use
smaller values.

BTW, the problem with my old scope was that the Zener voltage varied
considerably with temperature on SOME of the Heath Zeners.  I bought
extras and selected ones that were stable.  This corrected the dimming
as it warmed up problem that it had always had!  Using more standard
diodes might also be more reliable in this way.

Jim
   ---------------------------------------------------------------------
       Melissa Kepner                                    Jim Adney
       [e-mail]              [e-mail]
                             Laura Kepner-Adney
                             Madison, Wisconsin
   ---------------------------------------------------------------------



From [e-mail] Sat Dec 21 13:28:51 1996
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From: "William M. Spaulding, Sr." <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Where Hi Voltage Zeners?
Date: 15 Dec 1996 14:37:21 GMT
Organization: WMS Electronics/Consulting
Lines: 22
Message-ID: <01bbea95$432bef00$039a76cc@billspau>
References: <58esuq$[e-mail]>
NNTP-Posting-Host: coffee1-03.dialup.evt.accessone.com
X-Newsreader: Microsoft Internet News 4.70.1155

For many years Neon bulbs were used as a reference voltage source for
high-voltage power supplies.  If your current levels are consistent, go to
Radio Shack, stack up a few bulbs (70 to 90 volts per bulb) and get the
'scope back up.  Make sure the current is properly limited!

Hope this is of help.

Vy 73's
Bill
NA7Y

Terry Simonds <[e-mail]> wrote in article
<58esuq$[e-mail]>...
>
> I have a Heathkit scope (IO-104) that has managed to eat a string of
> 275V 3-mA Zeners. Anybody out there have a source for such a beast?
>
> Thanks
>
>
>
>


From [e-mail] Sat Dec 21 13:28:52 1996
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From: "msimons" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Where Hi Voltage Zeners? Why not use a varistor?
Date: 13 Dec 1996 21:37:39 GMT
Organization: Internet Access Eindhoven, the Netherlands
Lines: 50
Message-ID: <01bbe946$6f8832c0$344697c2@marc'scomputer>
References: <58esuq$[e-mail]> <58ks77$1br0$[e-mail]> <58q6oh$[e-mail]>
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Hi there, I do not know the scope well, but you might concider to use a
varistor in stead. They are quite stable too, though I do not know if they
are stable over temperature as well....?
Good luck with it anyway...
Marc

Melissa & Jim <[e-mail]> wrote in article
<58q6oh$[e-mail]>...
> [e-mail] wrote:
>
> >In <58esuq$[e-mail]>, [e-mail] (Terry Simonds)
writes:
> >>
> >>I have a Heathkit scope (IO-104) that has managed to eat a string of
> >>275V 3-mA Zeners. Anybody out there have a source for such a beast?
> >>
> >>Thanks
> >>
> >>
> >> Hi Terry,
> >
> >    Try a place called either Surplus Salvage or Surplus Supply a call.
They are
> > in Benton Harbor, Michigan. They have/had a lot of the old Heath parts.
I
> > don't have their number, but 1-616-555-1212 outta get you close. Good
Luck
>
> I had just such a repair on a Heath scope years ago and spent quite a
> while looking for alternate sources of HV diodes.  In the end I could
> find nothing except for Heath above 200 V.  Keep in mind that it is
> perfectly legitimate to add a few more diodes to your string and use
> smaller values.
>
> BTW, the problem with my old scope was that the Zener voltage varied
> considerably with temperature on SOME of the Heath Zeners.  I bought
> extras and selected ones that were stable.  This corrected the dimming
> as it warmed up problem that it had always had!  Using more standard
> diodes might also be more reliable in this way.
>
> Jim
>    ---------------------------------------------------------------------
>        Melissa Kepner                                    Jim Adney
>        [e-mail]              [e-mail]
>                              Laura Kepner-Adney
>                              Madison, Wisconsin
>    ---------------------------------------------------------------------
>
>


From [e-mail] Sat Dec 21 13:28:53 1996
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From: "Peter Gottlieb" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Where Hi Voltage Zeners? Why not use a varistor?
Date: 14 Dec 1996 23:33:45 GMT
Organization: Altopia Corp. - Affordable Usenet Access - http://www.alt.net
Lines: 20
Message-ID: <01bbea17$30450e40$24102399@peter-s>
References: <58esuq$[e-mail]> <58ks77$1br0$[e-mail]> <58q6oh$[e-mail]> <01bbe946$6f8832c0$344697c2@marc'scomputer>
X-Newsreader: Microsoft Internet News 4.70.1155

msimons <[e-mail]> wrote in article
<01bbe946$6f8832c0$344697c2@marc'scomputer>...
>
> Hi there, I do not know the scope well, but you might concider to use a
> varistor in stead. They are quite stable too, though I do not know if
they
> are stable over temperature as well....?
> Good luck with it anyway...
> Marc

Varistors are not too stable with temperature and are not as "sharp" as
zeners.  Also, they are not designed for constant dissipation and too much
will cause them to violently ignite.

If you want to play, try some of the older gas regulator tubes (e.g., OA4).
 They used to work well, but I would add high value parallel resistors if
making a string of them.

...Peter



From [e-mail] Sat Dec 21 13:28:55 1996
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From: Jay Craswell <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Where is Jay?  I'm here!
Date: 13 Dec 1996 18:21:42 GMT
Organization: Dover Research Corp.
Lines: 26
Message-ID: <58s6rm$eo3$[e-mail]>

Apparently I'm not setting the ignore options right or whatever.  "Jay" is her
e.
I don't check USENET all the time.  I'm working on a bunch of projects for
97 and have not been keeping up with the threads.  I do check my E-Mail
almost everyday.  If you commented or asked a question about Circad and I
didn't reply PLEASE don't take it as an insult.  I honestly do think Circad
is a great program.  Heck I use it to generate artwork all the time.  And that
(to me) is my main source of income.  Well until publishers clearing house
calls.  The only reason I got involved with the Ham package was that I saw a
need for a program that Hams & Students could afford that would not require a
bank loan or divorse from the XYL.   I did a tiny bit of work on part of the
program and the owners set up a special site license for Hams in general.
My company does the support (Yes really!) and you do get the manuals and can
get updates for $50.  Someone started the rumor that you don't get manuals and
there is no support.  I love talking Circad and I happen to think I know most
of the answers.  Plus since I work late hours you can phone when the rates are
lower.  So support is around through Dover.  Manuals etc?  Of course!
I keep hearing about a shareware version of Circad.  There is not and never ha
s
been a shareware version.  There is a FREE demo.  This allows you to try the
program.  It does not have all the features but will give you all you need to
know if it works.  The Ham version $295 is the complete program.  Same softwar
e
as the $995 version but no support from Holophase.  Your stuck with Dover.
Updates are also not free.  $50 per update whenever you decide to update.
Yes, if you have the program for 4 years and never update you can update for
$50.  No auto Extortion policy like some others...   So, flame off ok?
--
73, Jay WB0VNE - AAV5TH


From [e-mail] Sat Dec 21 13:28:57 1996
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Where is Jay?  I'm here! RE:CirCAD
Date: 14 Dec 1996 10:12:04 GMT
Organization: AOL http://www.aol.com
Lines: 57
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References: <58s6rm$eo3$[e-mail]>
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In article <58s6rm$eo3$[e-mail]>, Jay Craswell
<[e-mail]> writes:

>
>Apparently I'm not setting the ignore options right or whatever.  "Jay"
is
>here.
>I don't check USENET all the time.

Here is one you missed...


You are trying to promote a software
program, that has very little value, at a
tremendous price.

There are better freeware programs. In particular
the Easytrax program which I am sure you are aware of.
It has a block feature, easily understood, that permits
making your own symbols for import.

That you can comm with hams better than the printed
word catches my attention. 1 of perhaps 1000, perhaps, has
any need for a drawing program. PCBoard layouts come with
the construction articles.

 Your concern should be directed at producing symbols for the Easytrax
program. THAT would provide proof you are taking hams concerns at heart.

I find no fault in your desire to make a few bucks or a living thru
expertise or business savvy.

The deal on the CC software ain't no deal.


Carl


Now tell me how do you get over $700 discount on that program?
Details OK. I got time.
I think tremendous profits are were or will be made with deals like that
Support? 70% of the program cost for support!
30% for all other expenses... Come onnnn. Did you not think about that
70% in your deal with them?

CirCad is $50 program at best.
Perhaps my copy was not shareware. It was on a shareware CD-ROM
I believe. No matter. The learning curve was too steep compared to
Easytrax which felt like a slight grade.

Yesterdays programs fall by the way fast when compared to more modern
ones like DraftChoice - $99. We require a cosmeticly (?) appealing screen
nowadays.
If the CC program you are pushing has a nice windows look then perhaps it
is
worth $60- $100. You must compare your old CC with the old freeware
Easytrax though and when you do the deal on CC ain't no deal.


From [e-mail] Sat Dec 21 13:28:58 1996
Path: news1.epix.net!news3.epix.net!uunet!in2.uu.net!205.252.116.190!feed1.news.erols.com!howland.erols.net!swrinde!ihnp4.ucsd.edu!news1.ucsd.edu!news-mail-gateway
From: [e-mail] (Spencer Trombly)
Newsgroups: rec.radio.amateur.homebrew
Subject: WHITE CHRISTMAS
Date: 20 Dec 96 20:38:21 GMT
Organization: ucsd usenet gateway
Lines: 53
Message-ID: <Pine.SUN.3.94.961220153533.13438A-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 13:28:59 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-pen-16.sprintlink.net!tezcat!news.bbnplanet.com!cam-news-hub1.bbnplanet.com!uunet!in3.uu.net!155.229.2.176!metro.atlanta.com!not-for-mail
From: BOB DUCKWORTH <[e-mail]>
Newsgroups: rec.radio.shortwave,rec.radio.amateur.homebrew,misc.forsale.computers.modems,misc.forsale.computers.others.misc
Subject: WRSwap: ISDN hardware for Shortwave or Ham gear
Date: Wed, 18 Dec 1996 11:40:35 +0000
Organization: Atlanta Technology Library and Museum
Lines: 17
Message-ID: <[e-mail]>
Reply-To: [e-mail]
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I have some new, surplus, ISDN terminal adapters.
They are ISDN BRI external units similar to the Motorola Bitsurfer.
Features: ISDN BRI, POTs, NI-1, sync or async to DTE via 25pin 'D' conn.

While I have been selling these for $125/each, I'd be just as happy to
swap for shortwave or ham gear. New, old, dead, or alive.
My main interests are older tube type receivers, early solid state
receivers, transmitters, and transceivers, and home brew receivers.
However, being easily amused, I'll consider anything ham or SW related.

I also have some older ISDN adapters which support only DMS100 and 5ESS
but not NI-1 whick I'd also like to swap. They are also new surplus and
I've been selling for about $40/each.

-bob
WB4MNF
[e-mail]


From [e-mail] Sat Dec 21 13:29:00 1996
Path: news1.epix.net!news3.epix.net!uunet!in1.uu.net!206.66.12.35!news-in.iadfw.net!usenet
From: [e-mail] (Eric Haskell)
Newsgroups: rec.radio.amateur.homebrew
Subject: WTB: HP8444 Trac. Gen. need Output module
Date: Sat, 21 Dec 1996 03:58:42 GMT
Organization: INTERNET AMERICA
Lines: 3
Message-ID: <[e-mail]>
Reply-To: [e-mail]
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Please state 8444 price and condition.
Eric Haskell
[e-mail]


From [e-mail] Sat Dec 21 13:29:01 1996
Path: news1.epix.net!news3.epix.net!uunet!in3.uu.net!204.127.130.5!worldnet.att.net!ix.netcom.com!#gekko95
From: [e-mail] (Dave)
Newsgroups: rec.radio.swap,rec.radio.amateur.equipment,rec.radio.amateur.boatanchors,rec.radio.amateur.homebrew
Subject: WTB: Old Heat SB-xxx chassis for homebrew projects
Date: 15 Dec 1996 17:06:11 GMT
Organization: Netcom
Lines: 23
Message-ID: <591b63$[e-mail]>
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Xref: news1.epix.net rec.radio.swap:99850 rec.radio.amateur.equipment:44484 rec.radio.amateur.boatanchors:1134 rec.radio.amateur.homebrew:22099

Hi!  I just bought an old SB-102 chassis with all of the parts
removed for $15 to use as a homebrew project chassis.  I plan
to repaint, and cover the faceplace with a new thin sheet of
aluminum for my new rig to live in. (2 stage, 30 watt all band
CW rig with built-in VFO)

Well, I need another and possibly 2 more - one for a matching
receiver I'm planning, and another for a small amplifier.

So I am looking for ANY SB-xxx chassis, completely stripped of parts
or not - don't care what the model was - even could maybe use smaller
boxes, like old SB-610 scopes or speaker boxes, or whatever.  Again,
I am after the boxes and the innards are not important (although if
any parts still remain, they would be put away for future homebrew)

Cheap is kind of important, though.  That's why I am specifying no parts
and looks are unimportant, as long as no dents or cutouts that would
be tough to paint over.  $10 to $20 is the range I was thinking.

email to Dave  [e-mail]


Thanks to anyone who replies!


From [e-mail] Sat Dec 21 13:29:02 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-peer.gsl.net!news.gsl.net!news-lond.gsl.net!news.gsl.net!netcom.net.uk!ix.netcom.com!#gekko95
From: [e-mail] (Dave)
Newsgroups: rec.radio.amateur.boatanchors,rec.radio.swap,rec.radio.amateur.equipment,rec.radio.amateur.homebrew
Subject: WTB: Old SB-xxx chassis for homebrew project
Date: 15 Dec 1996 01:10:47 GMT
Organization: Netcom
Lines: 25
Message-ID: <58vj6n$[e-mail]>
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Hi!  I just bought an old SB-102 chassis with all of the parts
removed for $15 to use as a homebrew project chassis.  I plan
to repaint, and cover the faceplace with a new thin sheet of
aluminum for my new rig to live in. (2 stage, 30 watt all band
CW rig with built-in VFO)

Well, I need another and possibly 2 more - one for a matching
receiver I'm planning, and another for a small amplifier.

So I am looking for ANY SB-xxx chassis, completely stripped of parts
or not - don't care what the model was - even could maybe use smaller
boxes, like old SB-610 scopes or speaker boxes, or whatever.  Again,
I am after the boxes and the innards are not important (although if
any parts still remain, they would be put away for future homebrew)

Cheap is kind of important, though.  That's why I am specifying no parts
and looks are unimportant, as long as no dents or cutouts that would
be tough to paint over.  $10 to $20 is the range I was thinking.

email to Dave  [e-mail]


Thanks to anyone who replies!


From [e-mail] Sat Dec 21 13:29:03 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!worldnet.att.net!ix.netcom.com!#gekko95
From: [e-mail] (Dave)
Newsgroups: rec.radio.swap,rec.radio.amateur.homebrew,rec.radio.amateur.equipment,rec.radio.amateur.boatanchors
Subject: WTB: Old SB-xxx chassis for homebrew project
Date: 20 Dec 1996 03:12:46 GMT
Organization: Netcom
Lines: 28
Message-ID: <59d07e$[e-mail]>
NNTP-Posting-Host: tac-wa2-02.ix.netcom.com
X-NETCOM-Date: Thu Dec 19  7:12:46 PM PST 1996
X-Newsreader: News Xpress Version 1.0 Beta #4
Xref: news1.epix.net rec.radio.swap:100348 rec.radio.amateur.homebrew:22204 rec.radio.amateur.equipment:44699 rec.radio.amateur.boatanchors:1180

Hi!  I just bought an old SB-102 chassis with all of the parts
removed for $15 to use as a homebrew project chassis.  I plan
to repaint, and cover the faceplace with a new thin sheet of
aluminum for my new rig to live in. (2 stage, 30 watt all band
CW rig with built-in VFO)

Well, I need another and possibly 2 more - one for a matching
receiver I'm planning, and another for a small amplifier.

So I am looking for ANY SB-xxx chassis, completely stripped of parts
or not - don't care what the model was - even could maybe use smaller
boxes, like old SB-610 scopes or speaker boxes, or whatever.  Again,
I am after the boxes and the innards are not important (although if
any parts still remain, they would be put away for future homebrew)

Cheap is kind of important, though.  That's why I am specifying no parts
and looks are unimportant, as long as no dents or cutouts that would
be tough to paint over.  $10 to $20 is the range I was thinking.

email to Dave  [e-mail]


Thanks to anyone who replies!


(PS - I now have 2, and the transmitter is coming along. Gathering parts
for the receiver.  Now if I can find another SB-xxx box for the 811 amp,
and maybe a speaker box, or other similar SB-xxx.... 73's


From [e-mail] Sat Dec 21 13:29:04 1996
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!wits.uni.net.za!csir.uni.net.za!und.uni.net.za!und.ac.za!iafrica.com!pipex-sa.net!bowl.news.pipex.net!pipex!news.ukpats.org.uk!lade.news.pipex.net!pipex!dish.news.pipex.net!pipex!news.hiway.co.uk!news
From: [e-mail] (Ken Clark)
Newsgroups: rec.radio.swap,rec.radio.amateur.homebrew
Subject: Re: WTB: S meter
Date: Tue, 10 Dec 1996 18:31:03 GMT
Organization: HIWAY Internet Service Provider
Lines: 19
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
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January edition of 'Hamradio Today Mag' has a simple homebuild kit -
looks quite nice! de ken/G4MPQ
The can be reached on  Internet :-
http://www.netlink.co.uk/users/hrt


On Mon, 02 Dec 1996 08:19:28 -0800, Lennart Nilsson
<[e-mail]> wrote:

>Phil Heaton wrote:
>>
>> I need an S meter for my homebrew rig. Does anyone
>>  have one they'd like to sell?
>
>Whatever you buy it won't give a true reading. Use any small meter and
>mark the dial with the help of a calibrated signal generator connected to
>the antenna input.
>73 de Len SM5DFF



From [e-mail] Sat Dec 21 13:29:05 1996
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!compuserve.com!news.production.compuserve.com!news
From: Jay Craswell <[e-mail]>
Newsgroups: rec.radio.swap,rec.radio.amateur.homebrew
Subject: Re: WTB: S meter
Date: 9 Dec 1996 17:28:45 GMT
Organization: Dover Research Corp.
Lines: 4
Message-ID: <58hi8d$g42$[e-mail]>
Xref: news1.epix.net rec.radio.swap:100068 rec.radio.amateur.homebrew:22135

Good point Len.  Most every S meter is bogus that I've checked.  More of a
relative signal strength.
--
73, Jay WB0VNE - AAV5TH


From [e-mail] Sat Dec 21 13:29:06 1996
Path: news1.epix.net!news3.epix.net!uunet!in2.uu.net!169.207.30.10!newspump.sol.net!howland.erols.net!worldnet.att.net!ix.netcom.com!news
From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: WTB: Stancor P4080 transformer.R Lloyd.
Date: Sat, 14 Dec 1996 07:29:42 GMT
Organization: Netcom
Lines: 6
Message-ID: <[e-mail]>
NNTP-Posting-Host: smx-ca3-09.ix.netcom.com
X-NETCOM-Date: Sat Dec 14  1:28:24 AM CST 1996
X-Newsreader: Forte Free Agent 1.1/32.230

Im looking for a power transformer with 350 volts each side of
center,6.3 volts and 5 volts.Attempting to build the 35 watt tx in the
april issue of QST 1950.Also needed Stancorpart#C1001,10.5hy. 110-ma.
filter choke.  Thanks in advance....   73 . R Lloyd  .KE6ONN.
[e-mail]



From [e-mail] Sat Dec 21 13:29:07 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!enews.sgi.com!news.sgi.com!news.sprintlink.net!news-peer.sprintlink.net!nntp.bnl.gov!usenet
From: Scott Coburn <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew,sci.electronics.design
Subject: WWVB/WWV references web page
Date: Mon, 16 Dec 1996 15:36:11 -0500
Organization: Brookhaven National Laboratory, Upton, NY, USA
Lines: 16
Message-ID: <[e-mail]>
NNTP-Posting-Host: gorzarg5.phy.bnl.gov
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I have collected together some references to magazine articles about
WWVB/WWV/LORAN-C/LF/VLF radio receiver design and construction.  I put
the list up on my web site.  I also put some digital clock stuff up
that I stumbled across while looking through old magazines.  I would
be interested in any other references that relate to this stuff.

I would also be interested in leads to kits for receivers of this type.

Thanks Much.

Scott

--
scott coburn                              brookhaven national laboratory
mailto:[e-mail]                                      upton, ny, usa
http://gorzarg5.phy.bnl.gov/~scott                      (on long island)


From [e-mail] Sat Dec 21 13:29:08 1996
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!news.sgi.com!news.tamu.edu!news.utdallas.edu!nrchh45.rich.nt.com!bcarh189.bnr.ca!nott!temp1.ott.igs.net!not-for-mail
From: [e-mail] (Michael J. Donohue)
Newsgroups: rec.radio.amateur.homebrew
Subject: Yaesu FT-227R
Date: Fri, 13 Dec 1996 23:59:13 GMT
Organization: IGS - Information Gateway Services
Lines: 11
Message-ID: <[e-mail]>
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Hi:
    Does anyone happen to have the schematic for this radio. All I
have is the manual and it only list the block diagrams. What I need is
the pinouts for the Accessory plug. I would like to use this radio for
packet and from the manual the mic plug alone will not work as it does
in more recent radio. Any help on the pinouts for this radio would be
gratly appreciated. Tnx

73 Mike
VE3DMJ



From [e-mail] Sat Dec 21 13:29:09 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.homebrew
Subject: Re: Yaesu FT-227R
Date: 15 Dec 1996 02:49:51 GMT
Organization: AOL http://www.aol.com
Lines: 13
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]
(Michael J. Donohue) writes:

> Any help on the pinouts for this radio would be
>gratly appreciated. Tnx

The ol' blue Memorizor.

I got one and I believe the schematic.
Let me look for it.
I'll get back to you.

Carl


From [e-mail] Thu Jan 02 17:48:02 1997
Newsgroups: rec.radio.amateur.homebrew
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!mindspring!cssun.mathcs.emory.edu!news.radio.org!wa4mei!ke4zv!gary
From: [e-mail] (Gary Coffman)
Subject: Re: Suppressor calculations
Message-ID: <[e-mail]>
Reply-To: [e-mail] (Gary Coffman)
Organization: Destructive Testing Systems
References: <[e-mail]> <[e-mail]> <[e-mail]>
Date: Thu, 12 Dec 1996 17:40:24 GMT
Lines: 30

In article <[e-mail]> measures@mail.
vcnet.com (R. L. Measures ) writes:
>>   -  A neutralization circuit that is effective at VHF (reduce the
>> feedback).
>
>Ah yes, but the fly in the ointment is that neutralization  neutralizes the
>amplifier at the operating frequency---but NOT at the anode circuit's
>resonance frequency.

Neutralization is a technique which can be used at any single frequency
where instability may be a problem. It is not limited to the operating
frequency.

A related concept, called unilateralization, attempts to neutralize the
amplifier at *every* frequency for which the amplifier has gain. This
can require a much more complicated network than is needed to just
neutralize at a single frequency of course.

Better is to just design the amplifier from scratch to be unconditionally
stable. That's the way the solid state PAs in most exciters are designed.
And Tom would like to tell us that it is the way a good GG tube PA is
designed too.  Dissipative suppressors can play a role in achieving
unconditional stability, of course, but they aren't the only way to
achieve it.

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] Thu Jan 02 17:48:04 1997
Newsgroups: rec.radio.amateur.homebrew
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!mindspring!cssun.mathcs.emory.edu!news.radio.org!wa4mei!ke4zv!gary
From: [e-mail] (Gary Coffman)
Subject: Re: Good source for amplifier tips
Message-ID: <[e-mail]>
Reply-To: [e-mail] (Gary Coffman)
Organization: Destructive Testing Systems
References: <[e-mail]> <[e-mail]> <[e-mail]>
Date: Thu, 12 Dec 1996 18:27:57 GMT
Lines: 67

In article <[e-mail]> measures@mail.
vcnet.com (R. L. Measures ) writes:
>In article <[e-mail]>, [e-mail]
>wrote:
>>Hi Rich,
>
>>... ... Could you look this over an comment. It
>>seems to indicate you do not understand Q. Could you tell me if I did
>>something wrong?
>snip
>
>Ok, Tom.. Sorry for the delay, but there were some other issues that didn't
>appear to wash, which I dealt with first.
>>snip,,,
>
>With 70 nH and 100 ohms:
>Q = 2.3
>...snip...
>
>........Does Q = 2.3?
>
>This is a parallel circuit, so most things are inverted.  (Standing on head
>may be useful.)  Instead of calculating reactance (X), as would be the case
>for a series circuit,  we  must instead calculate  susceptance (B).  . In a
>parallel circuit, we graph B (with the + and - signs inverted) and
>conductance (G), (G=1/R), to calculate admittance (Y) instead of graphing R
>and X to calculate impedance (Y).    R is in ohms and G is in siemens.
>(archaic: mhos) .  Using Y=1/Z and Z=1/Y, we can convert a parallel circuit
>to a series equivalent circuit, or we can convert a series circuit to a
>parallel equivalent circuit.
>
> In order to be able to use the formula Q=X/R, we must first convert the
>parallel 70nH/50 ohm circuit (Y) to an equivalent series circuit (Z) by
>using Z=1/Y.  To do this, most everything inverts.  BL @100MHz, is
>-1/(2*Pi*100^6 Hz*70^-9 H) = -22.7 milli-siemens.  The G of the 50 ohm R is
>1/50 = 20 milli-siemens.
>
>  To graph this, the -22.7 milli-siemen BL vector heads down and the 10
>milli-siemen G vector heads to the right.  The resulting vector forms a
>right triangle whose tangent is -22.7/10 = -2.27, = -66.22 degrees.  The
>hypotenuse, Y,  can be solved with the square root of the sum of the
>squares. Thus, Y = 24.8 siemens@-66.22 degrees
> Using Z=1/Y, , we convert this to an equivalent series circuit whose Z
>vector can be resolved into its X and R components---the very things we
>need to solve Q=X/R.  Solving for Z = 1/(24.8 millisiemens @-66.22
>degrees), Z = 40.3 ohms @+66.22 degrees.  The X vector is sin 66.22 degrees
>(0.915) * 40.3 ohms = 36.9 ohms.  The R vector is cos 66.22 degrees (0.403)
>* 40.3 ohms = 16.2 ohms.
>
>Finally, using Q=X/R, Q = 36.9/16.2 = 2.28.  Thus, your answer of Q = 2.3
>looks good to me, Tom.

Or you can skip all that monkey motion and simply use Q=Rp/X.
For Tom's example, 70nH at 100 MHz is 43.98 ohms and R is stated
as 100 ohms (not 50 as you mistakenly use above). Dividing

100/43.98 = 2.27, or rounded, Q = 2.3.

I'll leave it as an exercise for you to discover your error(s) in the
above gyrations that allowed you to come up with the right answer after
starting with the wrong value for R.

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] Thu Jan 02 17:48:06 1997
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From: "Ian White, G3SEK" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Coils wire diameter
Date: Tue, 17 Dec 1996 18:17:29 +0000
Organization: IFW Technical Services
Lines: 60
Distribution: world
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Tom Bruhns wrote:
>The newer 7th edition, dated 1986, and now called "Reference Data for
>Engineers," has a table, "Courtesy Whitehead Metal Products Co., Inc.,"
>which is a comparison of various gauge standards.  It lists "AWG B&S,"
>"Birmingham or Stubs BWG,"   "Wash. & Moen W&M,"   "British Standard
>NBS SWG,"   "London or Old English,"   "United States Standard  US,"
>and "American Standard Preferred Thickness."  (The last one isn't
>really a gauge number standard...)   I'm sure there are others.

Wow... Old English. Presumably that is the pre-1883 version!
Are you sure that the book isn't called "Reference Data for Industrial
Archaeologists"?

> I
>would hope the part of the world that's been smart enough to go metric
>has also converted to simple metric diameters and thicknesses in place
>of gauge numbers, but I guess old habits die hard.

It varies a lot in Britain. Steel, wood and building materials have come
in metric sizes for many years now, but most of them are uncannily close
to the old traditional inch sizes!

Aluminium is only available with an extra "i", and comes almost
exclusively in inch dimensions for rod and extruded sections, and SWG
thicknesses for sheet. Tubing comes in inch outside dimensions by SWG
wall thickness. Copper wire is still available in SWG sizes, but is
rapidly moving over to millimetre diameters.

Nuts and bolts are a "mindfield" (as my dyslexic friend so aptly says).
In the car industry we'd just become accustomed to US sizes (American
Fine) when it all went metric, in a pincer movement from Continental
Europe and Japan. For amateur radio construction we all used to use
even-numbered BA sizes (British Association of something-or-other) and
then that too went metric. Metric bolts are easy to use, because the
size of the bolt is also the size of the clearance hole.

Never did understand any of this American 4-32 stuff...

In spite of this confusion, almost all professional mechanical
engineering in Britian is "born metric". Children aren't even educated
in feet, inches or pounds any more, so maybe in a few generations they
really will need a reference book to learn about the old units!

>Thank goodness US
>manufacturers are getting metricized, even though our kitchens and
>roadways are still miles and ounces and tablespoons...

Roads are still in miles and mph, but British cooking recipes have
always tended to work by weight. This is fortunate because ounces are
the same the world over, but your cups, pints and gallons are different
from ours. Since my wife is from the USA, our kitchen works in four
different kinds of units: ounces, grams, US cups and British cups. And
as well as degrees F and C for the oven, there's the Gas Mark system...


Aaargh! But it does keep you pretty nimble on the pocket calculator.



73 from Ian G3SEK


From [e-mail] Thu Jan 02 17:48:07 1997
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From: Michael Black <[e-mail]>
Newsgroups: sci.electronics.design,rec.radio.amateur.homebrew
Subject: Re: Direct conversion FM receiver
Date: Thu, 19 Dec 1996 12:14:35 -0500
Organization: Communications Accessibles Montreal, Quebec Canada
Lines: 42
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Xref: news1.epix.net sci.electronics.design:28610 rec.radio.amateur.homebrew:22279

Superregenerative receivers will detect FM signals.  It's been a while
since I've read up on them, and I can't remember whether they do the
detection due to slope detection (where an AM receiver is used to
demodulate an FM signal by mistuning it, so the frequency variation
becomes an amplitude variation since it's sweeping back and forth
along the skirt of the receiver's selective circuits), or if FM
detection is some inherent part of superregenerative detectors.

Superregenerative detectors are among other things, very wide band.
They'd probably work for FM BCB signals, indeed I think probably some
simpler receivers from days gone by did that, but to use one to
detect narrowband FM, such as 2m signals, will result in little or
no recovered audio.

You can't get much simpler than a superregen receiver.  One transistor
detector, followed by an audio amp.

A phase locked loop would qualify as a "direct conversion" fm receiver.
But running a PLL at VHF, where I presume you want to detect a
signal, might be problematic.  First, finding a PLL that runs okay
at that frequency.  Then, again the recovered audio is a product of
how large the deviation is.  In a superhet receiver, the signal is
moved to a lower frequency where the deviationis a larger percentage
of the if signal.  Running the PLL at the signal frequency, deviation
is a much smaller percentage of the signal frequency.  Again, it
would work better for the wide band deviation of FM BCB signals.

     Michael  VE2BVW



 [e-mail] (innovative technologies) writes:
 >Hello all,
 >Is there such a thing as a Direct conversion FM receiver, similar to
 >designs available for CW and SSB reception? Sensitivity isn't a
 >premium.
 >I've heard about mini FM receivers for the broadcast FM band (such as
 >"wrist watch" or "necklace" versions), that might implement such a
 >concept.
 >Any pointer in the proper direction (either theoretical or a practical
 >design) would be truly appreceated.



From [e-mail] Thu Jan 02 17:48:08 1997
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From: Steve <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: How much are BLW96 trannies ??
Date: Thu, 19 Dec 1996 22:09:44 +0000
Organization: Moi
Lines: 17
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Hi,

Those of you who take radcom know whats coming....

I'm interested in building an amplifier which uses BLW96 transistors.
How much do these cost (in the UK preferably) ??

Those who have Radcom, what do you think of the 6m amp project ?
I wondered about leaving out the pre-amp, as my 6m output is supposed to
be 10 or 15W or so.Not read the (so far) articles in depth together to
see whether this is feasable..

73
--
Steve  FOR SALE: Suzuki GSX1100EFE,D reg,only 12500miles,XGC.

Turnpike evaluation. For Turnpike information, mailto:[e-mail]


From [e-mail] Thu Jan 02 17:48:10 1997
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From: [e-mail] (R. L. Measures )
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: Sat, 21 Dec 1996 08:11:41 -0800
Organization: Internet Access of Ventura County
Lines: 37
Message-ID: <[e-mail]>
References: <59c4i0$[e-mail]> <[e-mail]>
NNTP-Posting-Host: port23.vcnet.com

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

> In article <59c4i0$[e-mail]>, [e-mail] (Tom Bruhns)
> writes:
>
> >
> > -- Did you indeed measure 5.95 volts, or is that just part of a
> >    hypothetical question?
...snip...
> Hi Tom,
>
> I agree with all your points.
>
> I'd like to add an area I consider of major concern to the list. In spite
> of all the free-flowing "carte blanche" criticism of everybody else in the
> world, technical descriptions of how to measure things are almost totally
> missing. The "helpful" suggestions are based on the author's view
> "everyone else is incompetent and a liar".

I am aware of only one person who was caught lying in this debate.  One
person is not "everybody", and one person is hardly "everyone else", Mr.
Rauch.   Is this a case of misery loves company?

 "Criticism of everybody else in the world" certainly sounds impressive.
That's a lot of people.  Who is criticising all these people Mr. Rauch?

 I have found most of the participants here to be forthright individuals
who are interested in science.

IMO, any manufacturer of a 3CX800A7 amplifier who uses 15v on the heater,
who tells customers that 15v is perfectly okay (even through Eimac
specifications state otherwise)  is incompetent.  However, if you have a
different opinion, Mr.  Rauch, I fully support your right to that opinion.

--
--Rich-- ag6k, 805-386-3734


From [e-mail] Thu Jan 02 17:48:12 1997
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From: Tom Woolner <[e-mail]>
Newsgroups: sci.electronics.design,rec.radio.amateur.homebrew
Subject: Re: Direct conversion FM receiver
Date: Sat, 21 Dec 1996 17:12:20 +0000
Organization: Cat City Dog Pound
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In article <[e-mail]>, Jim Potter
<[e-mail]> writes
>[e-mail] (innovative technologies) wrote:
>
>>Hello all,
>>
>>Is there such a thing as a Direct conversion FM receiver, similar to
>>designs available for CW and SSB reception? Sensitivity isn't a
>>premium.
>Many years ago (about 33!) I built a simple FM radio using an RCA
>tunnel diode. I believe the circuit was in one of their semiconductor
>data books, but I don't remember the name of it.
>
>The tunnel diode served as a mixer and an oscillator, but there was
>only one tuned circuit. The if was essentiallly 150 kHz or so. There
>were no tuned elements in the IF stages. The IF circuit was several
>(4) cascadeded limiters of two transistors each. The output of the
>limiter stages triggered a one shot with fixed pulse width for every
>zero crossing. The one-shot output was averaged to provide the
>detected audio.
>
>The circuit occupied a 4" X 9" perf board when made from discrete
>components. I still have it. It actually worked pretty well. The
>biggest problem was interference from AM stations overloading the
>front end if you made the antenna lead too long. I used it for
>background music in my shop for several years with just a twin lead
>dipole.
>
>The neatest thing about it was that it didn't take any fancy equipment
>to get it going. One could probably duplicate it more compactly with
>modern IC's, but you'd probably want to do something different than
>the tunnel diode front end.
>

Hi Jim,

That circuit appeared in the GE Transistor Manual (I have my copy ,the 7th
ed. 1964)  It is on page 385 and has a note against the front end section
which says: "Converter oscillates at one half signal frequency"  You might
have difficulty getting that past the CE and FCC assessments!

It has an AFC loop which can only work if the tunnel diode oscillates at
signal +/- 200KHz or so.  As you say there is no precise definition of the IF.
The 300R  antenna feeder couples via a 1:1 transformer arrangement so
high signal strength is needed and no isolation easily acheived.

Regards,
--
Tom Woolner




From [e-mail] Thu Jan 02 17:48:14 1997
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From: "Ian White, G3SEK" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: Sat, 21 Dec 1996 17:38:12 +0000
Organization: IFW Technical Services
Lines: 57
Distribution: world
Message-ID: <i7Cl3FAECCvyEwv$@ifwtech.demon.co.uk>
References: <[e-mail]>
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Like K1BQT, I'm another uninvolved observer, trying to sift and weigh
the mountains of evidence in this long-running thread.

Rich Measures wrote, a few days ago:
> I phoned
>Eimac's Salt Lake City division at  801-972-5000.  I explained what has
>been taking place in this debate.  I said that certain claims about Mr.
>Miklos were being made in his absence, and that I would like to verify
>these claims.

Some written evidence is available here. According to the profiles of
the authors in the ARRL UHF/Microwave Experimenter's Manual:

"Buzz Miklos... is currently the manager of R&D for RF cavities and
tubes at VARIAN EIMAC in Salt Lake City, Utah."

Note that that the word "currently" in that quotation probably meant
1989-90, just before the book was published. Tom, W8JI did say that Mr
Miklos has since moved on from that position and relocated.

If there is any inconsistency between the written record and information
that some person at Eimac Human Resources gave out by telephone, we'll
have to decide which source to trust more. Ask yourself: would anybody
supply ARRL with false information about his employment position,
knowing that it would  be printed for everybody to see? (In most
companies, "promoting" yourself into your boss's shoes is a severely
career-limiting move.)

Again referring to the written record, by courtesy of Rich's own Web
pages, the letter from Mr Foote of Eimac described the gold-sputtered
tubes as:

 "both have been badly overheated internally, the apparent result of an
oscillation condition."

Note two things. 1. Mr Foote consciously decided to insert the word
"apparent", implying a judgement rather than a statement of verifiable
fact.  2. He did not say anything about the frequency of the apparent
oscillation condition.

That letter was dated 1986, but it seems that Eimac staff no longer
support Mr Foote's view. In QST for September 1994, Reid Brandon of
Eimac opposed Rich's interpretation of the Foote letter. Although he did
not say outright that "This is Eimac's corporate view," he did identify
himself clearly, publicly and in detail as an Eimac employee. Would he
then have stated views that his company did not support? (In most
companies, that would be another career-limiting move.)

There seems to have been no further change in Eimac's position since
then.

Still sifting and weighing...

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 17:48:15 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: HF Linear Wanted
Date: Sat, 21 Dec 1996 20:17:58 GMT
Organization: Computerese Information Network
Lines: 8
Message-ID: <[e-mail]>
NNTP-Posting-Host: kkts-10.cin.net
X-Newsreader: Forte Agent .99e/16.227

Happy Holidays and thank you for reading this.  I would like to buy a
high-power linear amplifier that is well built and looks commercial.
The power supply should be heavy duty and I would like the amp to
cover 160-10 meters.  8877s, 3X500Zs, 3-1000Zs, or similar tubes are
preferred.  I'm sure someone has an excellent homebrew amp at a
reasonable price.  Thanks in advance for your reply.

                                        Jim  [e-mail]


From [e-mail] Thu Jan 02 17:48:16 1997
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From: [e-mail] (Patrick De Gagne)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Sound Blaster DTMF Generator
Date: Sat, 21 Dec 1996 21:09:58 GMT
Organization: Communications Accessibles Montreal, Quebec Canada
Lines: 26
Message-ID: <[e-mail]>
References: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: dynamicppp-166.hip.cam.org
X-Newsreader: Forte Agent .99e/32.227

On Thu, 19 Dec 1996 06:16:19 -0800, Brian Padgett <[e-mail]>
wrote:

>Does anybody know of software for a DTMF generator for the SB16 sound
>card? I'd like to be able to input numeric strings and have the sound
>card output the DTMF's for remotely controlling a repeater controller.


HI Brian!

Well, quite simply get a hold of a program called COOLEDIT, it's on
the web, so you shouldn'T have any problems websearching it.

It allows you to generate Touch tones, or any other possible tones you
might want to generate.  I used it to generate my FD's two tones to
test my minitor pager.

Hope this helps

Pat

--
  \/  Scouter Pat  -  Patrick De Gagne  -    Montreal, Canada
  /\   Dollard Des Ormeaux Scouts & Venturers
 /  \   http://www.cam.org/~pdg       IRC: I-Spy on #Scouting
/    \   [e-mail]  - VE2VFD -  I used to be a Flying Frog!


From [e-mail] Thu Jan 02 17:48:17 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.net!www.nntp.primenet.com!nntp.primenet.com!ix.netcom.com!#gekko95
From: [e-mail] (Dave)
Newsgroups: rec.radio.swap,rec.radio.amateur.homebrew,rec.radio.amateur.boatanchors,rec.radio.amateur.equipment
Subject: WTB: Coil Stock - B&W 3012
Date: 21 Dec 1996 22:39:59 GMT
Organization: Netcom
Lines: 20
Message-ID: <59hovv$[e-mail]>
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I am looking for a couple lengths of B&W 3012 coil stock for
a receiver project.  I know I could wind my own, but there are
4 interlinked coils in the project and I doubt I'd have a very
easy go of trying to get them all on the money.

It's 3/4" in diameter, 32 tpi. I know there must be some old stock
lying around out there somewhere.

If you have any you can part with for a price fair to all, email me
at:

 Dave   [e-mail]


Many thanks in advance to any who reply.


Dave


From [e-mail] Thu Jan 02 17:48:17 1997
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From: Mark Robinson <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew,sci.electronics.design
Subject: Re: Wanted: Tips for constructing water cooled load
Date: Sat, 21 Dec 1996 15:52:14 -0800
Organization: Dis
Lines: 16
Message-ID: <[e-mail]>
References: <[e-mail]> <59e1vd$[e-mail]>
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> : I am wanting to build a non-inductive 8 kW load for 300 kHz, CW.  The

Given the low frequency, what about a few toaster elements, or 1kW
linear quartz halogen flood lamp bulbs (adjust impedance by adjusting
drive :)

--
Mark G Robinson | fax [phone] | Phone [phone]
[e-mail] |  Box 8770, Auckland 1035, New Zealand
-----------------------------------------------------------
21 Dec 1953 Former Iranian leader Mohammed Mosadegh sentenced to three
years
            in jail.
21 Dec 1970 Elvis Presley is designated an honorary anti drug campaigner
by
            President Nixon.


From [e-mail] Thu Jan 02 17:48:18 1997
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From: [e-mail] (Dave)
Newsgroups: rec.radio.swap,rec.radio.amateur.homebrew,rec.radio.amateur.boatanchors,rec.radio.amateur.equipment
Subject: Merry Christmas to everyone in the group!, and THANK YOU!!
Date: 22 Dec 1996 01:06:28 GMT
Organization: Netcom
Lines: 19
Message-ID: <59i1ik$[e-mail]>
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I just wanted to wish everyone a very Merry Christmas.  I have posted
a number of articles recently looking for homebrew parts, and the
responses have been a downright pleasure to read. It's nice to know that
the spirit of Ham Radio, contrary to the opinions so often found
in some of these groups, is VERY much alive and well.

After 12 years out of the hobby, I am DELIGHTED to be back in, and I have
alot of you folks to thank.

MERRY CHRISTMAS, AND HAPPY NEW YEAR.



A VERY merry 73's


Dave WB7AWK


From [e-mail] Thu Jan 02 17:48:19 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] (Pieter Ibelings)
Newsgroups: rec.radio.amateur.homebrew
Subject: High Precision Synthesizers for sale. Cheap
Date: 22 Dec 1996 01:35:10 GMT
Organization: www.mindspring.com/~wave
Lines: 16
Message-ID: <59i38e$[e-mail]>
NNTP-Posting-Host: user-168-121-20-253.dialup.mindspring.com
Mime-Version: 1.0
Content-Type: Text/Plain; charset=US-ASCII
X-Newsreader: WinVN 0.99.8 (x86 32bit)

I have two high quality direct analog synthesis synthesizers for sale. These
are Programmed Test Sources PTS160. They cover .06 to 159,999,999 in steps of
1Hz. They have the built in TCXO or can be referenced to an external source of

5 or 10 MHz. Power is AGCed and can be varied from about 0 to 16 dBm.
Switching time is between 5 and 20 microseconds depending on the frequency.
All the units have the rack mount and GPIB and parallel interface allowing
them to be fully computer controlled. Spurious outputs are down
-75dBc(discrete), -35dBc(Harmonics). Phase noise is -63dBc(.5 Hz to
15KHz),-105dBc (100Hz), -115 dBc(1KHz). Power is within 0.5 dB flatness
between .1 and 160 MHz. Price is $550 shipped. Current price on identical
units is around $7000. These units are surplus from used NMR imaging equipment

and are in great shape. For more information please e-mail me. Thanks

Pieter Ibelings
N4IP



From [e-mail] Thu Jan 02 17:48:21 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!arclight.uoregon.edu!news-peer.gsl.net!news.gsl.net!howland.erols.net!portc02.blue.aol.com!audrey01.news.aol.com!not-for-mail
From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: 22 Dec 1996 01:56:35 GMT
Organization: AOL http://www.aol.com
Lines: 26
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]
X-Newsreader: AOL Offline Reader

>The only magic I have seen around here lately is the way people who no
>longer work at Eimac can magicly be promoted and demoted.  For instance,
>the Chief Specifictions Engineer, Power Grid Division got demoted to
>letter writer guy.  An Engineer B got promoted to 'R+D engineering
>manager' (whatever that is).  Both actions took place years after they
>left Eimac.
>
>--
>--Rich-- ag6k, 805-386-3734

I sell tubes to broadcasters for a living.

In the late 80's I had problems with some Eimac tubes. When I called Eimac
they transfered me to the manager of tube engineering at Varian. His name
was Miklos.

In 1990 I went to the NAB show. I met a ham wa4gpm who worked VHF DX. His
name was Miklos and his card said R and D manager. He was there with John
Button from Varian.

Bill Foote is in poor health now, he broke his hip. He is retired, but
when he worked at Varian he handled answering customer return letters at
Varian. Reid Brandon is a applications engineer, like Bill Orr was.
Brandon and Button still work for Eimac.

WA9NVN, Mike


From [e-mail] Thu Jan 02 17:48:22 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!worldnet.att.net!uunet!in2.uu.net!205.228.248.26!news.vcnet.com!port24.vcnet.com!user
From: [e-mail] (R. L. Measures )
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: Sat, 21 Dec 1996 18:45:48 -0800
Organization: Internet Access of Ventura County
Lines: 37
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
NNTP-Posting-Host: port24.vcnet.com

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

> >The only magic I have seen around here lately is the way people who no
> >longer work at Eimac can magicly be promoted and demoted.  For instance,
> >the Chief Specifictions Engineer, Power Grid Division got demoted to
> >letter writer guy.  An Engineer B got promoted to 'R+D engineering
> >manager' (whatever that is).  Both actions took place years after they
> >left Eimac.
> >
> >--
> >--Rich-- ag6k, 805-386-3734
>
> I sell tubes to broadcasters for a living.
>
> In the late 80's I had problems with some Eimac tubes. When I called Eimac
> they transfered me to the manager of tube engineering at Varian. His name
> was Miklos.
>
> In 1990 I went to the NAB show. I met a ham wa4gpm who worked VHF DX. His
> name was Miklos and his card said R and D manager. He was there with John
> Button from Varian.
>
> Bill Foote is in poor health now, he broke his hip. He is retired, but
> when he worked at Varian he handled answering customer return letters at
> Varian. Reid Brandon is a applications engineer, like Bill Orr was.
> Brandon and Button still work for Eimac.
>
> WA9NVN, Mike
----------------------------------
The personnel department at Eimac's Salt Lake City plant told me that
Joseph Miklos was not the R and D engineering manager.

Does Reid Brandon work in engineering or does he work in marketing?

--
--Rich-- ag6k, 805-386-3734


From [e-mail] Thu Jan 02 17:48:24 1997
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!portc02.blue.aol.com!audrey01.news.aol.com!not-for-mail
From: [e-mail] (HQ54)
Newsgroups: rec.radio.amateur.homebrew
Subject: HELP WITH BATTERY CHARGING
Date: 22 Dec 1996 04:10:09 GMT
Organization: AOL http://www.aol.com
Lines: 27
Message-ID: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

   Hi,

   I need some helpwith a project.  Recently I have been running a mobile
repeater in my car off the car battery.  After a couple months of use, the
car battery began to die.  It got to the point that after it running down
a couple of times, the repeater would completely drain the battery in less
than twelve hours.  Of course, this was not good for my battery.  Recently
replaced it at a cost of $70.00 because if I stooped to get gas and shut
off my engine, I could not restart.   I'd like to get a battery and
install it in the car for the repeater to use.  I'v found some very
inexpensive (the most important word here after upsetting the MRS. with
the purchase of the new battery due to MY repeater, since the car, and
battery, were only a year old) 12 volt 17 Ah and 24 Ah lead acid
batteries.  I need a way to charge the batteries quickly and safely.  The
other problem is that the car is rarely driven more than 20-40 minutes per
trip.  If the batteries only recieve a partial charge and then are
discharged, will that adversly affect the batteris.  Long term damage is
quite insignificant as the batteries are just 10 dollars, but I don't want
to have to replace them every week or month.  Any help in a charger or
suggestions as to better batteries, or even a different or better idea
would be most appreciated.  Please E-Mail me with the info.

Thanx advance for your help.

Mike

[e-mail]


From [e-mail] Thu Jan 02 17:48:25 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!insync!uunet!in2.uu.net!192.220.251.22!netnews.nwnet.net!news-hub.interserv.net!news.sprynet.com!news
From: "David Little" <[e-mail]>
Newsgroups: rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.amateur.misc
Subject: Need Schematic: Santec LS-202a
Date: 22 Dec 1996 05:14:50 GMT
Organization: Sprynet News Service
Lines: 25
Message-ID: <01bbefc6$b91a6b20$36a4aec7@node2>
NNTP-Posting-Host: ad22-054.compuserve.com
X-Newsreader: Microsoft Internet News 4.70.1155
Xref: news1.epix.net rec.radio.amateur.equipment:44830 rec.radio.amateur.homebrew:22264 rec.radio.amateur.misc:121372



I have a Santec LS-202A  VHF SSB/FM HT that I am trying to find a schematic
for.
A service manual would be nice also, I would even settle for a owner's
manual.

The unit receives properly, transmits properly, tx audio is good, rx signal
is good,
rx audio is gone.......  You can see the receive signal on the s-meter, and
if you listen
very closely you can hear clear audio from the speaker, only very faint.  I
have bypassed
the speaker and replaced the audio IC, and now want to get some service
info to go
further.

Any help appreciated,  A current address for Santec or it's remains would
also be a big
help.  A copy of a manual and schematic would be a blessing.

Seasons greetings

David  KD4NUE



From [e-mail] Thu Jan 02 17:48:26 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.net!news.idt.net!feed1.news.erols.com!worldnet.att.net!uunet!in3.uu.net!192.220.251.22!netnews.nwnet.net!news-hub.interserv.net!news.sprynet.com!news
From: "David Little" <[e-mail]>
Newsgroups: rec.radio.amateur.boatanchors,rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.amateur.misc,rec.radio.swap
Subject: Need Schematic - R105/ARR-15 Military
Date: 22 Dec 1996 05:21:28 GMT
Organization: Sprynet News Service
Lines: 19
Message-ID: <01bbefc7$a6960300$36a4aec7@node2>
NNTP-Posting-Host: ad22-054.compuserve.com
X-Newsreader: Microsoft Internet News 4.70.1155
Xref: news1.epix.net rec.radio.amateur.boatanchors:1218 rec.radio.amateur.equipment:44833 rec.radio.amateur.homebrew:22265 rec.radio.amateur.misc:121374 rec.radio.swap:100668



I  have a military HF receiver that covers 1.5 to 18.5 MC in 6 bands, with
an original
power input of 28.5 Volts DC.  It was modified by adding a power
transformer, bridge
circuits and filters for AC operation, and the power transformer decided
give up.  It
looked a bit small to do the job, and seems like it did a long, slow core
meltdown
before dying.  I would like to get the proper voltage and current
requirements so I
can try this my way.  Any help appreciated.

Thanks
Seasons Greetings

David KD4NUE



From [e-mail] Thu Jan 02 17:48:27 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!worldnet.att.net!news.dra.com!news-xfer.netaxs.com!news.voicenet.com!news
From: [e-mail] (Jim)
Newsgroups: rec.radio.amateur.homebrew
Subject: WTB 3-1000Z tube
Date: Sun, 22 Dec 1996 05:42:01 GMT
Organization: Voicenet - Internet Access - [phone]
Lines: 5
Message-ID: <59hvbu$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: ivyland349.voicenet.com
X-Newsreader: Forte Free Agent 1.0.82


I am in search of a 3-1000Z tube. If any has a good pull or a new
surplus tube please email me at [e-mail]
Thanks, Jim KA3JSO



From [e-mail] Thu Jan 02 17:48:28 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!news.bbnplanet.com!su-news-hub1.bbnplanet.com!news.pbi.net!news1.rcsntx.swbell.net!usenet
From: George Baker <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Packet pgm
Date: Sun, 22 Dec 1996 00:29:37 -0600
Organization: Southwestern Bell Internet Services
Lines: 24
Message-ID: <[e-mail]>
References: <E0vaWqe-0006Pc-00@fox>
Reply-To: [e-mail]
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Ron Giuntini wrote:
>
> Thanks to all that replied...I am running an old IBM PC and not windows, so
> unfortunatly I cannot use any newer windows packet programs...I found the
> problem that was preventing my system to work..Two actually.,..1 The TNC
> required a reset by removing the lithium battery. Something was not
> compatable with my computer..2 There was a flaky connection in the TNC to
> Radio cable...After finding and correcting these two items the thing went
> right to work...Now, however, I am still looking for suggestions for a more
> efficient terminal program...Bitcom does not allow me to save incoming stuff
> to disc or to scroll back thru stuff that has gone by on the screen..Any
> suggestions? Remember, this is an old system...640K memory & 360K drive.  I
> do have a 30Meg hard drive in it...The reason I am using such an old
> computer is because it was free...Thanks.
>                         Ron

Get a copy of TELIX (shareware). Although designed for telco links it is
excellent for ham radio comm purposes - has most of the bells and
whistles and is a DOS program that will run well on the older computers.

--
73, George
W5YR (original, not vanity)
Fairview, TX


From [e-mail] Thu Jan 02 17:48:29 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!news.kei.com!uhog.mit.edu!news.sgi.com!howland.erols.net!worldnet.att.net!ix.netcom.com!news
From: Bill Beekman <[e-mail]>
Newsgroups: rec.radio.amateur.misc,rec.radio.amateur.homebrew,rec.radio.amateur.equiptment,rec.radio.swap
Subject: Re: RADIO SHACK MODS PRO 51]
Date: Sun, 22 Dec 1996 02:01:14 -0500
Organization: Netcom
Lines: 16
Message-ID: <[e-mail]>
References: <[e-mail]>
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[e-mail] wrote:
>
> [e-mail] wrote:
> >
> > I am interested in getting a scanner thast has the best bang for the
> > buck.  A few people have recommended the RS Pro-51.  Presently it is
> > under $200.  I was wondering what other people think.  Is this a bargin.
> >  Are there any mods for this item.  Can you recomend another scanner our
> > source for scanners?  Any help would be greatly appreciated.
> >
> > Nick Yatko
> > [e-mail];
I have two buddies who both own the Pro51,  They both like it.  Only
problem is, RS changed the pro51 in mid production to include and
permanent cell block.  The earlier version only needed a keyed sequence
on the pad.


From [e-mail] Thu Jan 02 17:48:31 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.idt.net!feed1.news.erols.com!news.ecn.uoknor.edu!munnari.OZ.AU!comp.vuw.ac.nz!topnz.ac.nz!not-for-mail
From: Jim <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: 2m antenna tuner
Date: Sat, 21 Dec 1996 23:46:10 -0800
Organization: The Open Polytechnic of New Zealand
Lines: 48
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]> <[e-mail]> <58t1c7$[e-mail]> <Pine.SOL.3.91.961219065013.10115A-100000@supreme>
NNTP-Posting-Host: topnz226.topnz.ac.nz
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Peter Parker wrote:
>
> On 14 Dec 1996, TIEMANN BRUCE wrote:
>
> > In article <[e-mail]>,
> > Leon Heller <[e-mail]> wrote:
> > >
> > >I remember reading a review of a VHF matching unit in Radcom a few years
> > >ago, which successfully matched the Tx to a steel dustbin. 8-)
> >
> > ... I always find a perfect match when feeding my VHF/UHF antennas with a
> > few hundred feet of RG-58, or better, RG-174.  They won't take 1 kW
> > though; so how about a mile of RG-8?  Perfect 1:1 SWR every time...
> >
> > Bruce
> > N6URH
> >
> >
>
> 1:1 maybe, but not much RF out the other end. Better to use much less
> cable and properly match at the antenna.
>
> 73, Peter VK1PK

I use a small pi coupler mounted in a diecast box to match my 90 ohm
(more or less) RG62/U coax feeders to the 50 ohm antenna connection on
my 2 metre transceiver.

At the antenna - a 6 element yagi, I have used a coax balun matched to
the driven element at the appropriate point.

Why do I use RG62/U? Because I had a good quantity of it.

To set up the system, I terminated the coax balun with a 90 ohm set of
composition resistors (saved from the 1940s) and with an SWR bridge,
adjusted the pi coupler. Then I experimented with a stub match to the
driven element.

The pi coupler coil is about 3 turns of #20 gauge wire about 1/4 inch
dia. The capacitors are about 25 pF Johnson variables.

I hope that that helps.

73,

Jim, ZL2APE.
[e-mail]



From [e-mail] Thu Jan 02 17:48:32 1997
Path: news1.epix.net!news3.epix.net!uunet!in2.uu.net!205.252.116.190!feed1.news.erols.com!howland.erols.net!portc02.blue.aol.com!newstf02.news.aol.com!audrey01.news.aol.com!not-for-mail
From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: 22 Dec 1996 08:12:29 GMT
Organization: AOL http://www.aol.com
Lines: 13
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]
X-Newsreader: AOL Offline Reader

You asked me
>Does Reid Brandon work in engineering or does he work in marketing?

Mr. Measures sir.

I ansd that question before

I desire to not be involved in a direct conversation with you
I notice the way you treat and talk about others and it is not the sign of
a healthy person

Sign me out
Mike 9NVN


From [e-mail] Thu Jan 02 17:48:33 1997
Path: news1.epix.net!news3.epix.net!uunet!in1.uu.net!204.71.1.48!newsfeed.internetmci.com!atlas.tcac.com!usenet
From: "Joe B. Clark" <[e-mail]>
Newsgroups: alt.fan.art-bell,alt.sci.physics.relativity,sci.astro,sci.astro.amateur,sci.physics,rec.radio.amateur.homebrew,rec.radio.amateur.antennas
Subject: FAREWELL TO THE "SHIP OF THE MIND", AND TO ITS MASTER, DR. CARL SAGAN
Date: Sun, 22 Dec 1996 04:25:59 -0600
Organization: TCA Communications
Lines: 52
Message-ID: <[e-mail]>
References: <5977v4$[e-mail]> <32b78403.9982069@news2> <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: ncgd-pri1-a38.tcac.com
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To: [e-mail]
CC: [e-mail]
Xref: news1.epix.net alt.fan.art-bell:31251 sci.astro:151549 sci.astro.amateur:69035 sci.physics:231807 rec.radio.amateur.homebrew:22270

Already the days are not as bright as before. It seems that the light is
failing, and the brooding, heavy clouds are completely covering the sky
as the thick fog wells up from the dank, cold, nether regions of the
earth. Tonight, in the early morning hours, between midnight and 4:00
a.m., while you lie in your "secure", warm bed---hold your breath and
listen ever so carefully. "Outside in the cold distance", the faint
soul-chilling howl of the slowly approaching demon can already be heard!
If not by some "miracle", science and logic will soon be devoured and
torn asunder by this monster of ignorance and superstition. And, the
light of knowledge and learning will forever be extinguished.

Yesterday we lost a great man of science and the scientific method. We
lost an exceptional teacher, not only to the students who were lucky
enough to attend his varied classes at the university, but an
exceptional teacher who could teach the "masses" the most complicated
and exotic theory of physics, astronomy, cosmology, etc. with the ease
of teaching first grade math! A man whose "magical" speaking voice could
transport any and all of us, spellbound, to another star system or
galaxy--or even another dimension, and we could actually see and feel
the far distant surroundings. We lost "the pride of American science", a
good and moral man, the likes of which we will probably never see again
in this country, where the disciplines of the sciences are fast losing
ground in our present decaying educational system.

If we would honor Dr. Sagan, and wish to leave a memorial to him and
what he stood for, let us not forget the "kind" of science he believed,
lived, and taught----The science of Einstein, Oppenheimer, Hawking,
Chandrasakar, and their fellows. The REAL science!

Though he never lived to see the turn of the century, nor the
verification of the elusive extra-terrestial civilization that he
searched for with every fiber of his being for so very long, let US
continue the search with a vigorous, new campaign. Let us all signal our
respective congressmen and senators that this search is the single most
important quest on which mankind has ever embarked! Our very existence
may very well depend upon the success of such a search, and our place in
the universe most certainly does!

I have read a couple of posts that indicated maybe it was fortunate that
Dr. Sagan was no longer with us. I dismiss these with the thought that
the posters have no real knowledge of the Dr.. It's true, to some he may
have been a "debunker", but if pseudoscience, ignorance, and hoaxes
aren't debunked, then people, we are inviting the demon of darkness
right into our personal world.

If, and I say a big "if", there's life after death, then we now have one
of the very best researchers, ever, on it--- full time! Goodbye, Dr.
Sagan.I will miss your sane analysis in an increasingly insane world.

Respectfully,

Joe Bryan Clark, kc5itc


From [e-mail] Thu Jan 02 17:48:34 1997
Path: news1.epix.net!news3.epix.net!uunet!in3.uu.net!204.127.130.5!worldnet.att.net!arclight.uoregon.edu!super.zippo.com!zdc!zippo!205-173-43-245.fuhsd.org!user
From: [e-mail] (mike lyon)
Newsgroups: rec.radio.amateur.homebrew
Subject: 2 Ghz VCO's?
Date: Sun, 22 Dec 1996 03:16:31 -0800
Organization: Lyon Systems
Lines: 15
Message-ID: <[e-mail]>
NNTP-Posting-Host: 205-173-43-245.fuhsd.org

Does anyone know where I could obtain a 2411 MHZ VCO or oscillator?
Thanks in advance,
Mike

--

                               ///////////////////////////////////
                               |           Mike Lyon             |
                               |     Amateur Radio Callsign      |
                               |             KE6MRE              |
                               |        E-Mail Addresses         |
                               |     [e-mail]        |
                               |        [e-mail]         |
                               |      [e-mail]        |
                               \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\


From [e-mail] Thu Jan 02 17:48:35 1997
Path: news1.epix.net!news3.epix.net!uunet!in3.uu.net!204.127.130.5!worldnet.att.net!ix.netcom.com!super.zippo.com!zdc!zippo!205-173-43-245.fuhsd.org!user
From: [e-mail] (mike lyon)
Newsgroups: rec.radio.amateur.homebrew
Subject: Video Titler
Date: Sun, 22 Dec 1996 03:19:25 -0800
Organization: Lyon Systems
Lines: 18
Message-ID: <[e-mail]>
NNTP-Posting-Host: 205-173-43-245.fuhsd.org

I was wondering if anyone out there have any plans on how to build a video
titler where the characters overlay the video, I need something so i can
put my call sign on an atv transmitter.

Thank You,
Mike LYon

--

                               ///////////////////////////////////
                               |           Mike Lyon             |
                               |     Amateur Radio Callsign      |
                               |             KE6MRE              |
                               |        E-Mail Addresses         |
                               |     [e-mail]        |
                               |        [e-mail]         |
                               |      [e-mail]        |
                               \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\


From [e-mail] Thu Jan 02 17:48:36 1997
Path: news1.epix.net!news3.epix.net!uunet!in1.uu.net!205.228.248.26!news.vcnet.com!port19.vcnet.com!user
From: [e-mail] (R. L. Measures )
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: Sun, 22 Dec 1996 03:43:57 -0800
Organization: Internet Access of Ventura County
Lines: 23
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
NNTP-Posting-Host: port19.vcnet.com

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

> You asked me
> >Does Reid Brandon work in engineering or does he work in marketing?
>
> Mr. Measures sir.
>
> I ansd that question before

Mike---I reviewed all posts from you on this thread.  There is no such answer.


> I desire to not be involved in a direct conversation with you
> I notice the way you treat and talk about others and it is not the sign of
> a healthy person
>
> Sign me out
> Mike 9NVN

Ok, Mike.  You are out.  BTW, that's a pretty unusual callsign you have.

--
--Rich-- ag6k, 805-386-3734


From [e-mail] Thu Jan 02 17:48:37 1997
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From: [e-mail] (Daniel Wee, 9V1ZV)
Newsgroups: comp.arch.embedded,comp.robotics.misc,rec.radio.amateur.homebrew
Subject: Source for Toshiba TC518512AFT-80V Pseudo SRAM?
Date: Sun, 22 Dec 96 13:52:56 GMT
Organization: Singapore Telecom Internet Service
Lines: 15
Message-ID: <59jefo$[e-mail]>
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Hi,

        I am having a hard time finding a source for the
Toshiba TC518512AFT-80V 512kb Pseudo SRAM (flat pack) version.
I would really appreciate it if someone here could tell
me where I can get them in small quantities. Thanks in
advance.

73 de 9V1ZV Daniel

*------------+-------------------------------------+
| Daniel Wee | [e-mail]          |
| 9V1ZV      | [e-mail]               |
| QRP-L #667 | [e-mail] |
+------------+-------------------------------------+


From [e-mail] Thu Jan 02 17:48:38 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: 2m FM project for Theater
Date: Sun, 22 Dec 1996 14:17:27 GMT
Organization: XMission Internet (801 539 0900)
Lines: 23
Message-ID: <59jckg$[e-mail]>
References: <[e-mail]>
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[e-mail] (laura halliday) wrote:

>[e-mail] (Michael W. Malone) wrote:

>> Being new to ham radio, and having a problem that could be
>> solved with ham radio, I thought I'd ask some help for a
>> little project.

>> For a play I am directing, I need to turn on a switch remotely.
>> (BTW, the play is being performed by my Youth Drama Team at my
>> church.) I thought that it might be possible, and simple, to
>> create a reciever that would throw a relay after receiving a
>> code from the tone pad on my handheld...

Another solution is the use of radio controled airplane-boat servos,
motors and radio transmitters.  Thats kind of what they do.  You push
a button, and the motor on the other end is activated and moves an arm
that controls something.  I do not know what the cost may be.  Worth
checking out.

Ross
N7VWX



From [e-mail] Thu Jan 02 17:48:39 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
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References: <56l7cr$[e-mail]> <56na4m$[e-mail]>
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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 17:48:40 1997
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From: Michael Black <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Home brew TNC
Date: Sun, 22 Dec 1996 11:00:48 -0500
Organization: Communications Accessibles Montreal, Quebec Canada
Lines: 22
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References: <[e-mail]>
NNTP-Posting-Host: ocean.cam.org
Mime-Version: 1.0
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In-Reply-To: <[e-mail]>

Check with TAPR, the originators of the tnc now known as TNC-1 and the
TNC-2.  They may not still offer it, but a few years ago you could get
the schematic for the TNC-2 from them for a few dollars, and you could
also get a circuit board and/or the ROM.

I don't have the TAPR address handy.  I think their web page is
  www.tapr.org
but if that doesn't work, use one of the search engines.

     Michael  VE2BVW


On Tue, 17 Dec 1996, Francis Lee wrote:

> Does it possible make a home brew TNC (not Baycom)? If yes, where can
> find the circuit ?
> Rgds
>
> Lee
>
>



From [e-mail] Thu Jan 02 17:48:41 1997
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From: [e-mail] (Dave)
Newsgroups: rec.radio.swap,rec.radio.amateur.homebrew,rec.radio.amateur.boatanchors,rec.radio.amateur.equipment
Subject: WTB: Coil Stock - B&W 3012
Date: 22 Dec 1996 17:08:18 GMT
Organization: Netcom
Lines: 18
Message-ID: <59jpu2$[e-mail]>
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I am looking for a couple lengths of B&W 3012 coil stock for
a receiver project.  I know I could wind my own, but there are
4 interlinked coils in the project and I doubt I'd have a very
easy go of trying to get them all on the money.

It's 3/4" in diameter, 32 tpi. I know there must be some old stock
lying around out there somewhere.

If you have any you can part with for a price fair to all, email me
at:

 Dave   [e-mail]


Many thanks in advance to any who reply.


Dave


From [e-mail] Thu Jan 02 17:48:42 1997
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From: [e-mail] (MURPHY ELECTRONICS)
Newsgroups: rec.radio.amateur.homebrew
Subject: HAM TOOL-KIT CD ROM...HERE!!!
Date: Sun, 22 Dec 1996 17:16:18 GMT
Organization: Indigo
Lines: 10
Message-ID: <[e-mail]>
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An AWSOME collection of amateur radio related software.
Simply surf to http://sphynx.com/murphy
Plastic Accepted.

           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]

             Tel: [phone]  (SMS WELCOMED)


From [e-mail] Thu Jan 02 17:48:43 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: 22 Dec 1996 17:31:29 GMT
Organization: AOL http://www.aol.com
Lines: 31
Message-ID: <[e-mail]>
References: <[e-mail]>
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In article <[e-mail]>,
[e-mail] (R. L. Measures ) writes:

>It was not a hypothetical question.  The first time I worked on one of
>these amplifiers, I noticed that 3-500Z filament was so bright I could
>read a newspaper with the light from it.  This was no fluke, Tom.  At the
>time, the line voltage measured 240v with my John Fluke DMM.


Rich is correct here IF (big if) his information is accurate. I've seen
this problem in some PA's, but I have never measured (no pun intended) a
Command PA or a Henry.

I can't speak for Richard's claims in those cases, but if it is true the
manufacturers should be VERY concerned about correcting that problem.

>You are only guessing until YOU make the measurements, Tom.  I made the
>measurements.  I wrote about them in "The Nearly Perfect Amplifier" in
the
>January 1994 issue of QST magazine.

I do wonder where Richard got the formula [E1/E2]^23.5.  Is the answer in
hours, percent, seconds, or ratio? Where does it come from?

>Have you noticed that QST NEVER measures filament voltage, and NEVER
>measures filament inrush current in amplifier product reviews.

That is a good suggestion.

73
Tom


From [e-mail] Thu Jan 02 17:48:45 1997
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From: [e-mail] (Phil Clements)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: 22 Dec 1996 18:03:16 GMT
Organization: Your Organization
Lines: 37
Message-ID: <59jt54$[e-mail]>
References: <[e-mail]> <[e-mail]>
NNTP-Posting-Host: a2p06.connect.net
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In article <[e-mail]>, [e-mail] sa
ys:
>
>snip...
>
>During three or four periods of time in the 80's, Eimac had trouble with
>8877's. That's what drove ETO out of the contract business with GE
>medical, they couldn't get reliable tubes either. I remember visiting ETO
>and discussing the problem with Ray Heaton.
>

 This is a well known fact...the problem was so bad that a procedure was
 set up between Eimac and GE Medical to specially select 8877 tubes to be
 used in GE MRI machines. The "selection" criteria is a gray area at the
 moment, as Eimac has refused to answer my inquiries about the process.
 This is obviously done at the Eimac factory before delivery to GE and its
 MRI amplifier suppliers. In the late 1980's, after the "selection" program
 began. 8877 tubes appeared on the market (even as OEM units in Alpha amps)
 that were in plain brown boxes with blue labels marked "Industrial Tube".
 The tubes themselves were no longer labeled 8877, but "YU158". This process
 continues to this day. I suppose GE and ETO do not intend to get stung again!
 If you inquire at Eimac, they will tell you the YU158 is a "selected" tube,
 and is completely compatible with any 8877 application. I have tested several
 YU158's, and my experience is that the tubes put out the same power as the
 8877, but with slightly less plate current, much less grid current, and
 therefore less exhaust plenum temperature.

 snip....
>
>That problem nearly ruined sales of the 8877, and put ETO virtually out of
>the medical MRI business. People are still shy of the 8877 because of
>those 1980's problems.
>
>I would think purchasing a tube marked "YU158" would help to cure any
 remaining shyness.

 Season's greetings to all!
 Phil, K5PC


From [e-mail] Thu Jan 02 17:48:46 1997
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From: [e-mail] (KB6WKW)
Newsgroups: rec.ham-radio.swap,rec.radio.amateur,rec.radio.amateur.boatanchor,rec.radio.amateur.swap,rec.radio.amateur.homebrew,rec.radio.swap
Subject: FS COMMAND SETS
Date: 22 Dec 1996 19:19:05 GMT
Organization: Your Organization
Lines: 43
Message-ID: <59k1j9$[e-mail]>
NNTP-Posting-Host: pm10.cwo.com
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Xref: news1.epix.net rec.radio.amateur.homebrew:22285 rec.radio.swap:100740

(G4BXD,106312,[e-mail]) posted a message to
rec.radio.swap ( 8 dec 1996 16:57:51 GMT) looking for Command set bits
and
pieces. I tried to respond but cannot reach your email.
I tried using the Ham Callsign search servers but couldn't find
you listed there either..

This is what I have. All responses welcome.
I have a command set - R-27/ARC-5. It's got the following six tubes:
Tube Nr.       Condition
12SK7           - good
12SF7           - good
12V6            - good
12SQ7           - good
12SK8           - Unknown*
12SK7           - Bad**

*TV-7D/U nor the Simpson Model 1000 tube tester has setting to test the
12SK8.
** One of the 12SK7 Tubes is bad.

The cabinet is still intact, but it's missing the lid(?) that goes on
top over the tube compartment, and there is no dynamotor. The inside is
clean - no burned parts, etc.  Don't know if it works or not.

The whole thing weighs 7 pounds.I'm asking $45.00 plus shipping and
handling.


I also have two of the large three-ganged variables from a couple
of Command sets that were parted out.  I am asking
$5.00 ea + shipping and handling.

I've another R-27 chassis with caps, a few Coils,
and the varible condenser tuning unit and dial.
$8.00 + Shipping and handling.



Greg
KB6WKW




From [e-mail] Thu Jan 02 17:48:47 1997
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From: Michael Kassay <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Help! Re Heathkit Wx STN
Date: Sun, 22 Dec 1996 11:36:03 -0800
Organization: Sympatico
Lines: 16
Message-ID: <[e-mail]>
NNTP-Posting-Host: ppp2892.on.sympatico.ca
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X-Mailer: Mozilla 2.02E-SYMPA  (Win16; I)

Hi... I just purchased a unbuilt Heathkit model ID-5001 Weather Station.
 The kit was opened at one time, and a few peices have gone a stray... So
far Ive found out that the Aluminum boom that holds the wind direction
and speed indicator is missing...and the key pad buttons...
 Can anyone advise the lenght of the peice of aluminum, so I can make one
up..and poss tell me where I can poss buy a set of the keypad buttons??
  Oh yes... I did get an assembly , operation and a large illustration
booklet... It seems that Im missing another illustration booklet,,,one
for parts?????
   If anyonew can help me out with any info on the above, or any hints,
do's or donts while building this stn it would be appreciated...

Thanks

Mike
VE3MKX


From [e-mail] Thu Jan 02 17:48:48 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: 22 Dec 1996 21:21:17 GMT
Organization: AOL http://www.aol.com
Lines: 20
Message-ID: <[e-mail]>
References: <[e-mail]>
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X-Admin: [e-mail]
X-Newsreader: AOL Offline Reader

In article <[e-mail]>, Andy Heninger
<[e-mail]> writes:

>First, there is no difference between a tube in an "oscillation
>condition" and a non-oscillating amplifier, so far as the tube itself
>and its ratings are concerned.

Andy

I would have to disagree with this statement.  The assumption being
the "non-oscillating amplifier" would be properly tuned and loaded
and the tube operating within rated specifications.

In a VHF "oscillation condition" what mechanism exists to provide
a proper load for the generated VHF RF energy  in an HF
amplifier?  What would limit the tube's dissipation, or RF voltages?

73

Peter


From [e-mail] Thu Jan 02 17:48:49 1997
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From: [e-mail] (Wes Stewart)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Clamping Diode
Date: Sun, 22 Dec 1996 22:00:12 LOCAL
Organization: Starnet
Lines: 25
Message-ID: <[e-mail]>
References: <59l13l$[e-mail]>
NNTP-Posting-Host: usr9ip38.azstarnet.com
X-Newsreader: Trumpet for Windows [Version 1.0 Rev B final beta #4]

In article <59l13l$[e-mail]> [e-mail] (Michael Horo
witz) writes:
>From: [e-mail] (Michael Horowitz)
>Subject: Clamping Diode
>Date: Mon, 23 Dec 1996 07:13:30 GMT

>How are 'clamping diodes' described in the stores? Is 'clamping' part
>of the nomenclature, or is it describing one of several functions the
>diode can perform? The reason I'm asking this NG is that I have an 80%
>probability of walking into the local parts store and getting a blank
>stare, so I gotta go in armed!

This describes a function.  There won't be any diodes labeled "clamping
diodes" on your dealer's shelf.

The term might describe many things.  For instance, a common function is to
clamp (limit) the reverse voltage spike generated in a switched inductive load

(such as a relay) when the current is turned off.  A transistor switch in this

case might be destroyed by the reverse polarity voltage applied to the
collector.  The diode across the coil limits this voltage to approximately
.65V and saves the transistor.

Wes -- N7WS





From [e-mail] Thu Jan 02 17:48:51 1997
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From: Jay Craswell <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Where is Jay?  I'm here! RE:CirCAD
Date: 22 Dec 1996 23:17:58 GMT
Organization: Dover Research Corp.
Lines: 29
Message-ID: <59kfj6$ioh$[e-mail]>

Humm.  Well as I said before there is a program "called" Circad on a CD rom.
This is not the Circad that I'm talking about.  Of course I don't know which
one you are talking about.  I honestly think you have that other program
as I think Circad (the real one) is a pretty good program.  Nice, easy to use
and fast.  How many programs are written 100% in assembler now aways?
I have some friends who use it on 386 and even 286 machines.  The autorouter
runs faster on these old junkers than other programs run on current speed
demons!  But that takes us into the world of Bloatware <grin>.  As to the
points on ease of use the entire manual is online in HyperText.  Of course
you get a nice written one if you buy the program but it IS nice to be able
to look up things when the manual is stuffed under a pile of books.  Everythin
g
is menu driver.  With those Windows type menus that you mentioned.  One point
about Circad I perfer is that all the functions are also keyboard-able.  This
way you can touch type designs as well as pointing and clicking.  The mouse
is great when you don't know the commands but once you pass that you can
really fly!  I've done a good pile of PCBs with Circad and I've come up the
ranks with the "other" programs as well.  I like Circad because it addresses
the shortcomings of so many of the other programs.  Sure OrCAD SDT was ok in
its day.  I don't think any of the programs I used (and there were a few)
went from A-Z well at all.  And all of the PCB programs were pretty sad.
Today it is not enough to have a good PCB program or a good Schematic editor.
You have to have both to make it science not art.  Otherwise you spend too muc
h
time manualy verifying connections and that sort of rubbish.
If you do get a chance check and see which Circad you have.  If you have the
Holophase program that I guess we have to agree to disagree.  I suspect from
your comments that it is the Qbasic?  (or some other rubbish) thing I saw
on one of the Sharware CDROMs.
--
73, Jay WB0VNE - AAV5TH


From [e-mail] Thu Jan 02 17:48:52 1997
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From: [e-mail] (Nils Bull)
Newsgroups: rec.radio.amateur.homebrew
Subject: Like a Lafayette HA-600, man...
Date: 22 Dec 1996 23:36:24 GMT
Organization: AOL http://www.aol.com
Lines: 33
Message-ID: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

I'd almost forgotten about this, but my brother-in-law and I were talking
about  whiskey and swimsuit calendars when suddenly he remembered
something.
   "I've got an old radio you gave me years ago. You want it back?"
   "Sure," says I, dumber 'n a post.
   So after we looked at the swimsuit calendar (it was a Yule gift from
his uncle...), we got the radio out of the box.
   Now I have in my paws -- dust and all -- the Lafayette HA-600 receiver
that I'd bought off of Chuck Gelm (amateur call garbled in transmission
over time) for $5 one year when I was sober and Chuck weren't. What a
trip.
  First, I'd forgotten how fussy rotary switch contacts can be. I have to
jiggle  every knob a couple times back & forth to get anything to come out
of the headphone hole. And it ain't all that great at workin' either. But
the real shocker  to me was opening it up again, after all these years, to
discover that it's only got one little circuit board inside. Like some
sort of AM radio on a chunk of bakelite(tm) in the back of this anodized,
folded by a punch-press, heavier-n-me chassis & box. I mean, this sucker
is a monster next to my ICF-SW7600G.
  Heck, even the ICF-SW7600G has more letters in its name!

Whaddya think it's worth? At the Dayton flea market, I mean. And yes, I'm
serious. There's gotta be a demented, decerebrated-frog-type radio loonie
out
there somewheres what wants this piece of RADIO HISTORY(!!!![trumpet
fanfare
in the background as the dragsters rev up]!!!!!)

73
Nils
WB8IJN &c




From [e-mail] Thu Jan 02 17:48:54 1997
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From: "Will, KN6DV" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Icom switching problem
Date: 23 Dec 1996 00:02:48 GMT
Organization: KN6DV
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Message-ID: <01bbf064$945c66a0$[e-mail]>
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I have a Icom 775DSP and a Icom 706.
Both have the acc. Plug # 1 and 2.
I am using pin # 3 of the acc #2 to switch my amplifier (with the Ameritron
ARB-700 relay buffer)
using pin # 3 of acc plug1 to swath the radio TX on and off from the
computer via a level converter.
I am using this future for RTTY (I am using RITTY by K6STI)

Here is the problem I am having.
As soon I connect acc plug #1 (the one from the computer level converter)
the amplifier switch on, it does this even with the level converter
disconnected from the computer.

I also have tried a different relay buffer for the amplifier but the same
thing happens again.
So far I have tried anything I could think of an no result (It drives me
nuts) I even build a second level converter.

Any help would be appreciated.
 Thanks 73 Will,  KN6DV

--
http://www.av.qnet.com/~kn6dv

REFORM
Unless the reformer can invent something which substisutes attractive
virtues for atractive vices, he will fail.
(Walter Lippmann)



From [e-mail] Thu Jan 02 17:48:54 1997
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From: [e-mail] (Bruce KD1MW)
Newsgroups: rec.radio.amateur.homebrew
Subject: FS inverter,tubes,connectors++
Date: Sun, 22 Dec 1996 20:15:20 -0500
Organization: The Internet Connection
Lines: 22
Message-ID: <[e-mail]>
NNTP-Posting-Host: d-ma-fallriver-69.ici.net

BEST, 3000 Watt  32vdc to 120 vac power inverter, with load demand start
has all manuals and complete set of documentation.  $350 Plus shipping (
90lbs from RI).  Thanks, Bruce.   [e-mail]

4-250, pulse rated vacuum tubes, New, GE.  $45 each shipped most places USA.
Thank You, Bruce.  [e-mail]


N (M), connectors, crimp type, silver plated, by King Electronics Co. Part
# KN-59-309-MO7.  Good for RG 6 Foam size coax. $15 for 10 connectors shipped
most places  USA.  Thank You, Bruce.  [e-mail]


Several solid state High Voltage Diode blocks. 2.625"x 2.625"x .625" 60KV
@.1 amp, UNITRODE 86-526. Also 45KV @.3 amp UNITRODE 86-525. $10 ea.
Shipped most places
USA
Thanks for interest. Bruce.  [e-mail]

Barker & Williamson Model 425 Low Pass Filter.  1.5- 30 MC, @1KW, with
instructions.  $25+ shipping or Best offer.
Thank You All.  Bruce, KD1MW...


From [e-mail] Thu Jan 02 17:48:55 1997
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From: J&J Mac <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: CB to Ten
Date: Sun, 22 Dec 1996 17:33:01 -0800
Organization: West Coast Online's News Server - Not responsible for content
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To: Peter Parker <[e-mail]>

Peter Parker wrote:
>
> Hi All... I have an old Johnson Viking 352D 23 channel CB that I would
> like to get going on ten metres. I know that they can be converted to 28
> Mhz and that a switch to provide a 5kHz offset can be provided.
>
> Does anyone know how to do this? I have a similar set I bought that was
> already modified, and it's a real good radio - the receiver is better
> than my Kenwood TS120V.
>
> 73, Peter  Vk1PK

Hi Peter,  The article for conversion to 28.5 - 28.8 is in 73' Magazine, Novem
ber 1979. page 82.

All it has is some crystal changes and allignment procedures.. I didn't see an
ything there for the FM
portion on the band. .

If you wish I can fax you a copy of the article.

Jim.. KB6ZOP


From [e-mail] Thu Jan 02 17:48:56 1997
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From: "Andy" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Video Titler
Date: 23 Dec 96 02:39:37 GMT
Organization: University of Massachusetts, Amherst
Lines: 29
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mike lyon <[e-mail]> wrote in article
<[e-mail]>...
> I was wondering if anyone out there have any plans on how to build a
video
> titler where the characters overlay the video, I need something so i can
> put my call sign on an atv transmitter.
>
> Thank You,
> Mike LYon
>
> --
>
>                                ///////////////////////////////////
>                                |           Mike Lyon             |
>                                |     Amateur Radio Callsign      |
>                                |             KE6MRE              |
>                                |        E-Mail Addresses         |
>                                |     [e-mail]        |
>                                |        [e-mail]         |
>                                |      [e-mail]        |
>                                \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
>
I just got a book (Encyclopedia of Electronic Circuits, Volume 6) which has
a schematic for one in it.  I don't have a scanner, and it's pretty big.
If you really need it, I will draw it in.  I could send you a photo copy.
Andy, KB0MMU.



From [e-mail] Thu Jan 02 17:48:57 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.amateur.misc,rec.radio.scanner,rec.radio.swap,alt.radio.scanner
Subject: PRO 26 MOD ? is there one?
Date: Sun, 22 Dec 1996 21:18:38 -0600
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Is there a mod for cellular for the Pro 26?  I have one source that says
there is.  I would like to get a few more references before I attempt
it.  Any help would be greatly appreciated.  Thank you.


Nick Yatko
[e-mail]


From [e-mail] Thu Jan 02 17:48:58 1997
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From: Jerry Booth <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Sell/Trade 4-1000A RF Deck
Date: Sun, 22 Dec 1996 22:35:56 -0500
Organization: Microserve Information Systems (800)-380-INET
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Will sell or trade 4-1000A RF Deck complete. Set up for 80, 40, 20, 15
and ten. Vacuum plate and load tuning. Tuned input, full output tube and
SK406 chimney. Has switch installed accomidate either 4-1000A or
3-1000Z. Meters and power line all filtered. Deck is 17W X 17D X 16H.
The front panel is 19 X 17 this fits inside of a cabinet about two
inches larger in all directions. I also have a optional supply capable
of 4.5 KVDC @ 1 amp. The supply needs some work. The variac presently in
the supply is to small in current rating. I have the replacement units
for the supply. The RF deck is fully metered plate amps, plate volts,
grid current and rf output volts. Asking $550.00 for the RF Deck and
225.00 for th supply and new 20 amp variacs. Thanks Jerry W0ZD.


From [e-mail] Thu Jan 02 17:48:59 1997
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From: Michael Gladu <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Icom  IC-245 alignment manual needed !!!
Date: Sun, 22 Dec 1996 20:56:35 -0800
Organization: Warwick Online
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I am looking for a formal alignment prodecure for an ICOM IC-245 2M
mobile transceiver.  The unit I am working on has a PLL / display
problem.  Please email me at:  [e-mail] with any helpful
information.   Thanx de N1fbz - [e-mail]



From [e-mail] Thu Jan 02 17:49:00 1997
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From: [e-mail] (Jim Potter)
Newsgroups: rec.radio.swap,rec.radio.amateur.homebrew,rec.radio.amateur.boatanchors,rec.radio.amateur.equipment
Subject: Re: WTB: Coil Stock - B&W 3012
Date: Mon, 23 Dec 1996 06:59:32 GMT
Organization: JP Accelerator Works, Inc.
Lines: 18
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References: <59hovv$[e-mail]>
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[e-mail] (Dave) wrote:

>
>
>I am looking for a couple lengths of B&W 3012 coil stock for

Try Surplus Sales of Nebraska in Omaha. 1-800-244-4567 or
402-346-4750. They are showing 3012 coils for $9.  That seems high to
me, but then a dollar isn't what it used to be.

73 de K9GXC, Jim


James M. Potter, President              TEL: [phone]
JP Accelerator Works, Inc.              FAX: [phone]
2245 47th Street                        EMAIL: [e-mail]
Los Alamos, NM 87544-1604               URL: http://www.jpaw.com



From [e-mail] Thu Jan 02 17:49:01 1997
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From: [e-mail] (Michael Horowitz)
Newsgroups: rec.radio.amateur.homebrew
Subject: Clamping Diode
Date: Mon, 23 Dec 1996 07:13:30 GMT
Organization: Erol's Internet Services
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How are 'clamping diodes' described in the stores? Is 'clamping' part
of the nomenclature, or is it describing one of several functions the
diode can perform? The reason I'm asking this NG is that I have an 80%
probability of walking into the local parts store and getting a blank
stare, so I gotta go in armed!



From [e-mail] Thu Jan 02 17:49:01 1997
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From: Gerhard Hoffmann <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: 2 Ghz VCO's?
Date: Mon, 23 Dec 1996 00:25:52 -0800
Organization: Unlimited Surprise Systems, Berlin
Lines: 14
Message-ID: <[e-mail]>
References: <[e-mail]>
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mike lyon wrote:

> Does anyone know where I could obtain a 2411 MHZ VCO or oscillator?

I used VCOs from Synergy that covered 2.0 - 3.0 GHz.

Their address is : 201 McLean Blvd, paterson, NJ 07504
tel [phone]


Gerhard

--
Gerhard Hoffmann        dk4xp


From [e-mail] Thu Jan 02 17:49:02 1997
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From: [e-mail] (Jim)
Newsgroups: rec.radio.amateur.homebrew
Subject: FS 3CX3000A7 socket
Date: Mon, 23 Dec 1996 10:17:21 GMT
Organization: Voicenet - Internet Access - [phone]
Lines: 6
Message-ID: <59l3s5$[e-mail]>
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I have a brand new 3CX3000A7 tube socket from eimac. I paid $295 for
it from rf parts and will sell it for any resonable offer or possibly
trade it for some other amp parts. Let me know what you have.
Thanks, Jim KA3JSO
[e-mail]



From [e-mail] Thu Jan 02 17:49:03 1997
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From: [e-mail] (R. L. Measures )
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: Mon, 23 Dec 1996 04:02:07 -0800
Organization: Internet Access of Ventura County
Lines: 34
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
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In article <[e-mail]>,
[e-mail] wrote:

> In article <[e-mail]>, Andy Heninger
> <[e-mail]> writes:
>
> >First, there is no difference between a tube in an "oscillation
> >condition" and a non-oscillating amplifier, so far as the tube itself
> >and its ratings are concerned.
>
> Andy
>
> I would have to disagree with this statement.  The assumption being
> the "non-oscillating amplifier" would be properly tuned and loaded
> and the tube operating within rated specifications.
>
> In a VHF "oscillation condition" what mechanism exists to provide
> a proper load for the generated VHF RF energy  in an HF
> amplifier?  What would limit the tube's dissipation, or RF voltages?
>
> 73
>
> Peter

Good point, Peter.  I have seen large air gaps arc for no apparent
reason.  An arced TL-922 tune capacitor is currently being shipped to me
from NM for testing.  I will test it and post the results here.  When this
tune capacitor was replaced with a new unit, it also arced.  IMO, the
mysterious intermittent arcing is VHF parasitic related.  The owner of the
amplifier, David Holtcamp, K5KH, is currently trying to arrange for having
the amplifier tested with a spectrum analzer at the lab where he works.

--
--Rich-- ag6k, 805-386-3734


From [e-mail] Thu Jan 02 17:49:05 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Where is Jay?  I'm here! RE:CirCAD
Date: 23 Dec 1996 12:19:05 GMT
Organization: AOL http://www.aol.com
Lines: 46
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References: <59kfj6$ioh$[e-mail]>
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In article <59kfj6$ioh$[e-mail]>, Jay Craswell
<[e-mail]> writes:

>If you do get a chance check and see which Circad you have.  If you have
the
>Holophase program that I guess we have to agree to disagree.  I suspect
from
>your comments that it is the Qbasic?  (or some other rubbish) thing I saw
>on one of the Sharware CDROMs.

For sake of argument, I downloaded CirCad from the Holophase BBS. I tried
to
get it from the WEB site but the copy was corrupted.

What I unzipped was the not exactly like the one I had previously tried.
The menus were still crummy. Just like I said before they look as if a
beginner made them. The look of the program seems like it was made at
least 10 years ago. Just like I said before.

When I said not exactly, I did find a few things were changed. Your
library are a little fuller of components and other symbols. Would that be
the highly touted work you added to the program?

I also noticed another change. The version I had, and I'm still sure it
was from a shareware CD-ROM ; NIGHT OWL I think, was a demo with a preset
time period. I could defeat that by setting my CPU date back to the date
of the program. Everything was renewed. The time limit I mean. Seems like
ya'll corrected that. Would that be why you don't support or recommend the
shareware version?

Well anyway you are wrong about the learning curve for CirCad. It is
steep!

Oh...answer my question about how you get over $700 off the cost of the
program.
Details are Okay. I got time. That is 70 % of the cost....

There are freeware programs out there that are a whole lot easier to
learn. Anyway hams can get construction PCBoards and layouts from the
author of most homebrew projects. 1 of 1000 hams, maybe, experiment in
radio design. CAD
ain't no household word yet.

Carl




From [e-mail] Thu Jan 02 17:49:06 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Like a Lafayette HA-600, man...
Date: 23 Dec 1996 12:19:07 GMT
Organization: AOL http://www.aol.com
Lines: 14
Message-ID: <[e-mail]>
References: <[e-mail]>
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In article <[e-mail]>,
[e-mail] (Nils Bull) writes:

>
>Whaddya think it's worth? At the Dayton flea market, I mean. And yes, I'm
>serious. There's gotta be a demented, decerebrated-frog-type radio loonie
>out
>there somewheres what wants this piece of RADIO HISTORY(!!!![trumpet
>fanfare
>in the background as the dragsters rev up]!!!!!)
>
>

Mine still works fine.


From [e-mail] Thu Jan 02 17:49:07 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Like a Lafayette HA-600, man...
Date: 23 Dec 1996 12:19:09 GMT
Organization: AOL http://www.aol.com
Lines: 22
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] (Nils Bull) writes:

>
>Whaddya think it's worth? At the Dayton flea market, I mean. And yes, I'm
>serious. There's gotta be a demented, decerebrated-frog-type radio loonie
>out
>there somewheres what wants this piece of RADIO HISTORY(!!!![trumpet
>fanfare
>in the background as the dragsters rev up]!!!!!)
>
>

Mine still works fine. I use it occasionally.
I might take $100 for mine. Maybe before I add a frequency display to it.
I really enjoy using old analog SW receivers. During my childhood we had
those big console radios that stood five feet high and lit up like
firworks when they were on. I loved to set in the dark and tune in the
world dreaming about those far away places and was amazed at how the
signal got here from there.

N9EFJ


From [e-mail] Thu Jan 02 17:49:08 1997
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From: [e-mail] (UTILITYNAM)
Newsgroups: rec.radio.amateur.homebrew
Subject: FS: The Complete RF TECHNICIAN'S Handbook
Date: 23 Dec 1996 14:58:53 GMT
Organization: AOL http://www.aol.com
Lines: 30
Message-ID: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]


--------------------------------------------------------------------
THE COMPLETE RF TECHNICIAN'S HANDBOOK
--------------------------------------------------------------------
(Published by Howard W. Sams, Inc.)

"The Complete RF Technician's Handbook" is THE book for the radio
communication's beginner, student, or experienced technician, and supplies
priceless information on not only wireless fundamentals, but also the
advanced concepts vital to a successful career in RF communications.

--------------------------------------------------------------------------
--------------------------
***Included are over 400 informative ILLUSTRATIONS and tables***
--------------------------------------------------------------------------
--------------------------

The handbook includes everything a technician needs to know in real-world
RF electronics -- from the fundamental concepts to the more advanced
explanations of modern ANALOG and DIGITAL RADIO circuits and modulation
methods. Furthermore, operational instructions on RF TEST EQUIPMENT, as
well as identifying proper and improper signal waveforms, and AM, FM, PM,
and SSB theory are included. In addition, transmitter and receiver testing
methods and TROUBLESHOOTING TECHNIQUES are solidly covered.
--------------------------------------------------------------------------
--------------------------
For Further Information Please View the Web Site at:
http://members.aol.com/COTTERSAY/rftech.htm




From [e-mail] Thu Jan 02 17:49:09 1997
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From: [e-mail] (Richard &/or Patti Herndon)
Newsgroups: rec.ham-radio.swap,rec.radio.amateur,rec.radio.amateur.boatanchor,rec.radio.amateur.swap,rec.radio.amateur.homebrew,rec.radio.swap
Subject: Re: FS COMMAND SETS
Date: 23 Dec 1996 15:23:31 GMT
Organization: Texas Networking, Inc.
Lines: 22
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References: <59k1j9$[e-mail]>
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In article <59k1j9$[e-mail]>, you say...

>12SK8           - Unknown*
>12SK7           - Bad**
>
>*TV-7D/U nor the Simpson Model 1000 tube tester has setting to test the
>12SK8.
>Greg
>KB6WKW

Greg,
You would have better luck if you looked at the tube tester's entry for a 12K8

(the 12 volt equivalent of the 6K8 converter/oscillator tube).  That's
probably why you didn't find it in the list.  The tube has a grid cap on top;
ergo, no 'S' in the name.  The 'S' denoted 'single-ended' tubes that had no
grid or plate caps.

Hope this helps.

73 de K5FNI
Richard



From [e-mail] Thu Jan 02 17:49:11 1997
Newsgroups: rec.radio.amateur.homebrew
Path: news1.epix.net!news3.epix.net!uunet!in3.uu.net!155.229.2.176!metro.atlanta.com!news.radio.org!wa4mei!ke4zv!gary
From: [e-mail] (Gary Coffman)
Subject: Re: Suppressor calculations
Message-ID: <[e-mail]>
Reply-To: [e-mail] (Gary Coffman)
Organization: Destructive Testing Systems
References: <[e-mail]> <[e-mail]>
Date: Mon, 23 Dec 1996 15:54:26 GMT
Lines: 30

In article <[e-mail]> [e-mail] wri
tes:
>In article <[e-mail]>, [e-mail]
>(Gary Coffman) writes:
>
>>In a well laid out amplifier using a compact power grid tube, the
>>cathode return path can be less than 25 mm (though it is often longer).
>>That's a high Z at 3 GHz. The path from the plate to the chassis/grid
>>connection point is usually much longer, about 200 mm or even more,
>>and that's a high Z at 325 MHz. Capacitive loading can lower that into
>>VHF, and that's what we have to deal with via suppressors.
>
>Rich's examples were overexaggerated. He made the L/W ratio of the lead 5
>in one case and 2 in another. When the L/W ratio is made lower and lower,
>the lead behaves more and more like a continuation of the groundplane. Z
>is relatively low regardless of lead length.

Right, I know that, Tom, but the 1/4-wave peaks (such as they are) do
fall out to those dimensions. A "groundplane" is never really ground.
That's always a single point, whether you intend it to be or not. And
for tubes with a grid flange, the path to that point is so short that
resonances at VHF are practically impossible for a grounded grid
configuration. (I'm sure you know that.) The problem comes with tubes
with long skinny internal leads. (I'm sure you know that too.)

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] Thu Jan 02 17:49:13 1997
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From: [e-mail] (Jim Potter)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: Mon, 23 Dec 1996 15:58:18 GMT
Organization: JP Accelerator Works, Inc.
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[e-mail] (R. L. Measures ) wrote:

> So how do we figure total Q when
>the parallel Ls contains series R of its own?
>
One perspective is to convert the parallel resistance to its
equivalent series resistance and then calculate Q as XL/RS', where RS'
is the new total series resistance.

The result I get is :

Q= XL/((RS(1=RS/RP)+XL^2/RP)

where XL is the inductive reactance, RS is the actual series
resistance, and RP is the actual parallel resistance.

Note that if RP goes to infinity the Q goes to the usual expression,
XL/RS.

And, if RS goes to 0 the formula goes to RP/XL, which s also correct
for that condition.

In general, Q is 2*pi*frequency*stored energy/power. For a complicated
circuit, just compute the losses (power) and the stored energy in
either the inductive part or the capacitive part of the circuit (they
are equal.) This works for trnasmission lines or any circuit
whatsoever.

One interesting technique that no one has mentioned in this lengthy
"discussion" is the pertrubation method. Ypu can determine the
equivalent circuit at any pair of terminals quite simply. First
measure the resonant frequency. Then add a known capacitance across
the two terminals in question. The change in frequency is delta f. The
change in capacitance is delta C. Since delta C over C = - 2 delta f
over f for small changes in frequency and we know f, delta f, and
delta C, we can calculate C=- (f*delta C)/(2 * delta f).

Now we can calculate the equivalent L at the  terminals. To get the
resistance, measure Q and calculate Rp=XL * Q.

Now, if you want to know what the impedance transformation is betwen
any two pairs of terminals, measure delta f at two places and
calculate the corresonding equivalent C's.  The impedance
transformation is just the ratio of the two capacitive reactances. If
you use the same delta C both places the impedance ratio is just the
ratio of the two delta f's.  The low impedance side is the one with
the smallest delta f.

Lots of useful information, no network analyzers required. This works
for any resonance in the system, HF or VHF. Warning: The accuracy can
be affected by the inductance of the perturbing capacitor.

If you don't have a reasonably well known capacitor, you can use a
short length of coax or twin lead and estimate its capacitance,
knowing the properties of the coax or twin lead.

The principle requirement here is a way to measure frequency
reasonably accurately, a calibrated signal generator or frequency
counter are best. Grid dip meters are pretty inaccurate, bumay do for
crude estimates.

73 de K9GXC, Jim


James M. Potter, President              TEL: [phone]
JP Accelerator Works, Inc.              FAX: [phone]
2245 47th Street                        EMAIL: [e-mail]
Los Alamos, NM 87544-1604               URL: http://www.jpaw.com



From [e-mail] Thu Jan 02 17:49:14 1997
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From: [e-mail] (Jack Kovar  KE0AX)
Newsgroups: rec.radio.amateur.homebrew
Subject: QST AUG-96 2mtr notch filter"L1"?
Date: 23 Dec 1996 16:27:06 GMT
Organization: InterAccess Networking
Lines: 27
Message-ID: <59mbsq$[e-mail]>
NNTP-Posting-Host: zeus.ia.net
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        QST has a great article in AUG 96 page 42 for building your own

notch filter for 2 meter pager inteference problems.

My problem is that I have not been able to find discribed value for L1.

Should I just use the formula for series resonant circuits and put in a

value of 1 to 14 pf for C2?

I have a box of bidirectional couplers with a male to female N connectors.

SMA sampling ports are dented.

A dandy box for this project if anyone is interested in one.

ANYWAY if someone would care to throw a value at me for L1 I will run

and check my math.

                                        Thanks,

                                                Jack Kovar
                                                   K0VAR

                                        Toddville, Iowa



From [e-mail] Thu Jan 02 17:49:15 1997
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From: [e-mail] (Jack Kovar  KE0AX)
Newsgroups: rec.radio.amateur.homebrew
Subject: MIRAGE B3016 preamp problem!
Date: 23 Dec 1996 16:44:46 GMT
Organization: InterAccess Networking
Lines: 26
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X-Newsreader: TIN [version 1.2 PL2]

        I have a MIRAGE B3016 2mtr amp/preamp that is giving me fits.

        I seem to have a bad FET U309 "metal case three legs".

        Diagram in book discribes it as a JFET J310 or U309.

        I crossed J310 with a NTE326 or ECG326, Three legs plastic JFET.

        Sound great right! Part is discribed as P channel General purpose

        AF AMP.  I know my hearing range won't make it to 144mhz.

        Circuit is  S is grounded, G is input with 120 ohm to ground,

        D is output with .15 ohm and +13.6 vdc.

        ANY ideas ?

        The ECG/NTE shoots the top off like pinball machine!

                                        Thanks,
                                                Jack Kovar
                                                   K0VAR
                                                   Iowa




From [e-mail] Thu Jan 02 17:49:16 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: 23 Dec 1996 20:39:20 GMT
Organization: AOL http://www.aol.com
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References: <[e-mail]>
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In article <[e-mail]>, Andy Heninger
<[e-mail]> writes:

>
>You have two specimens of trashed tubes, with different failure
>mechanisms.  I don't see how you are able to associate the failures with
>HF vs. VHF damage - it seems much more plausible that the grid was
>damaged by excess grid dissipation (independently of frequency), and
>that the cathode was damaged by excess cathode current, perhaps combined
>with low filament voltage.
>
>

What do these tubes use for insulation??  Is it B O?

The same dangerous stuff used in RF power transistors?

I hope readers of this thread aren't tempted to break open old
power tubes without knowing the dangers involved in doing so just
to check out the gold balls.

Pete


From [e-mail] Thu Jan 02 17:49:16 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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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 17:49:18 1997
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Date: Mon, 23 Dec 1996 17:41:47 -0600
From: [e-mail]
Subject: Wanted: Plans for a radio jammer or spark gap transmitter
Newsgroups: alt.radio.pirate,rec.radio.amateur.homebrew
Message-ID: <[e-mail]>
Organization: Kayvon's Homepage -- http://www.nethosting.com/~kayvon
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I'm looking for some good plans for a spark gap transmitter or anything else t
hat could be used for a medium range (20 to 200 feet) radio jammer. I've been
looking for some all today on the Internet with no luck, and if anyone has any
 plans at all, e-mail me:  [e-mail] and I'd be greatfull. If you do
reply to this, make sure to e-mail me as well because I don't get to read Usen
et newsgroups as often as I'd like to and I'm likely to miss the posting (espe
cially with Christmas coming up and all.) BTW, this is for IMFORMATIONAL PURPO
SES ONLY. Today's not the first day I've been looking for some plans, and I've
 all but given up.

-----
[e-mail]
-------------------==== Posted via Deja News ====-----------------------
      http://www.dejanews.com/     Search, Read, Post to Usenet


From [e-mail] Thu Jan 02 17:49:18 1997
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From: [e-mail] (K1BQT)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: 23 Dec 1996 23:42:56 GMT
Organization: AOL http://www.aol.com
Lines: 11
Message-ID: <[e-mail]>
References: <[e-mail]>
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Like the Energizer Bunny, new charges and claims against the amateur
industry to support the sales of a small after-market company could grind
forth with tedious repetition until everyone who even remotely cares may
stop challenging and go away in a state of dazed disbelief or fatigue.  On
the other hand, perhaps the new year will be kind to all of us and this
hideous thread will go away.  I, for one, am totally convinced that Rich's
claims have been proven sufficiently "incredible" to dismiss.  But, as
honest Abe said, "you can fool some of the people some of the time".  And.
perhaps that's often enough to keep the ole' bunny hopping!

Rick    K1BQT


From [e-mail] Thu Jan 02 17:49:20 1997
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From: [e-mail] (Robert Fowle)
Newsgroups: rec.radio.amateur.homebrew
Subject: FS: Tube & transformer books
Date: Tue, 24 Dec 1996 00:17:49 GMT
Organization: Zip News
Lines: 40
Message-ID: <[e-mail]>
Reply-To: [e-mail]
X-Newsreader: Forte Free Agent 1.1/32.230

Hi All!
        today have the following to find new homes for:
RCA                             plus shipping
        TT-5 rebound complete   $20
        RC-16 rebound complete  $20
        RC-19 rebound complete  $20
        RC-21 rebound complete  $20
        RC-25 rebound complete  $25
        RC-26 original complete $30

Taylor Tubes    1937 product catalog Nice  $25
Sylvania        1955 Technical Manual like new $20
Arrow   1962 catalog used 2 pages missing  $10 shipped
Stancore        S-101 1955      $20
Stancore        S-104 1958      $20
UTC             unknown loose pages no cover $20
Thordarson
        cat. # 400-D fall-winter 1939/1940  Complete xfmr cat. $25
        cat. # 352-F 1941 replacement xfmr cat. $25
        cat. # 342-A 1935 servicemans guide   $25
        cat. # 400-FX 1942, will include war-time suppl. $25
        cat. # 341 fall 1935 replacement xfmr's 4 pg's $15
        cat. # 400-X (? 1941 ?) complete xfmr cat.  $25

or, if you want all the above xfmr books will make package deal for you.

thats it for now...
**** Visit my Web Page.....****
=================================================]-[->
Robert Fowle      KC8DBC
1215 Winifred
Jackson, Mich. 49202-1946
Ph. 517-789-6721
E-mail:  [e-mail]
Web Page:  http://www.jacksonmi.com/hammarlund

NOW... BOATANCHORS Conference!
talk, buy-sell-trade all in one place!
Moderator: Robert Fowle
at: http://www.inetnc.com/hamchat/


From [e-mail] Thu Jan 02 17:49:22 1997
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From: [e-mail] (R. L. Measures )
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: Mon, 23 Dec 1996 16:29:19 -0800
Organization: Internet Access of Ventura County
Lines: 39
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
NNTP-Posting-Host: port10.vcnet.com

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

> In article <[e-mail]>, Andy Heninger
> <[e-mail]> writes:
>
> >
> >You have two specimens of trashed tubes, with different failure
> >mechanisms.  I don't see how you are able to associate the failures with
> >HF vs. VHF damage - it seems much more plausible that the grid was
> >damaged by excess grid dissipation (independently of frequency), and
> >that the cathode was damaged by excess cathode current, perhaps combined
> >with low filament voltage.
> >
> >
>
> What do these tubes use for insulation??  Is it B O?

No.  The insulation material is aluminum oxide (ceramic).

> The same dangerous stuff used in RF power transistors?
>
> I hope readers of this thread aren't tempted to break open old
> power tubes without knowing the dangers involved in doing so just
> to check out the gold balls.
>
Opening such tubes involves breaking nothing.  I hold the kaput tube is a
vice.  Using a fine tooth coping saw, I barely cut through the sheet metal
flange that is silver-soldered to the ceramic anode insulator.  One must
be careful not to let the saw blade penetrate more than a couple of mm
into the interior, or the grid cage could be damaged.

The tube in the photo was driven so hard that a short circuit developed
between the cathode and the grounded grid---yet no gold-sputtering damage
to the grid occured.  How is it possible to drive a shorted tube hard
enough with HF to cause gold sputtering.

--
--Rich-- ag6k, 805-386-3734


From [e-mail] Thu Jan 02 17:49:23 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Suppressor calculations
Date: 24 Dec 1996 00:40:03 GMT
Organization: AOL http://www.aol.com
Lines: 24
Message-ID: <[e-mail]>
References: <[e-mail]>
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X-Admin: [e-mail]
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In article <[e-mail]>, [e-mail]
(Gary Coffman) writes:

>
>Right, I know that, Tom, but the 1/4-wave peaks (such as they are) do
>fall out to those dimensions. A "groundplane" is never really ground.
>That's always a single point, whether you intend it to be or not. And
>for tubes with a grid flange, the path to that point is so short that
>resonances at VHF are practically impossible for a grounded grid
>configuration. (I'm sure you know that.) The problem comes with tubes
>with long skinny internal leads. (I'm sure you know that too.)

Exactly.

So the problem Rich attempted to present is so outlandish that it is a
moot point.
It is just another way to fuzz up the topic.

Modern PA designers are beyond using a wooden chassis, 250TH tubes, and 30
inch leads.

73 and have a good xmas.

Tom


From [e-mail] Thu Jan 02 17:49:24 1997
Path: news1.epix.net!news3.epix.net!uunet!in1.uu.net!205.228.248.26!news.vcnet.com!port10.vcnet.com!user
From: [e-mail] (R. L. Measures )
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: Mon, 23 Dec 1996 16:41:19 -0800
Organization: Internet Access of Ventura County
Lines: 28
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
NNTP-Posting-Host: port10.vcnet.com

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

> In article <[e-mail]>, Andy Heninger
> <[e-mail]> writes:
>
> >First, there is no difference between a tube in an "oscillation
> >condition" and a non-oscillating amplifier, so far as the tube itself
> >and its ratings are concerned.
>
> Andy
>
> I would have to disagree with this statement.  The assumption being
> the "non-oscillating amplifier" would be properly tuned and loaded
> and the tube operating within rated specifications.
>
> In a VHF "oscillation condition" what mechanism exists to provide
> a proper load for the generated VHF RF energy  in an HF
> amplifier?  What would limit the tube's dissipation, or RF voltages?
>
This afternoon I tested David Holtcamp's TL-922 tune capacitor.  The
breakdown voltage was about 6100V.  David observed that this capacitor
arced during operation on the CW tap.  The HF voltage present on the CW
tap is around 2000V  IMO, the intermittent arcing of the 6000v+ tune cap.
was due to a largely-unloaded VHF parasitic oscillation.

--
--Rich-- ag6k, 805-386-3734


From [e-mail] Thu Jan 02 17:49:25 1997
Path: news1.epix.net!news3.epix.net!uunet!in2.uu.net!206.229.87.25!news.sprintlink.net!news-peer.sprintlink.net!news.sprintlink.net!news-hub.sprintlink.net!news.sprintlink.net!news-fw-22.sprintlink.net!news.callamer.com!oso.slonet.org!cbuttsch
From: Clifford Buttschardt <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: MIRAGE B3016 preamp problem!
Date: Mon, 23 Dec 1996 17:47:49 -0800
Organization: Call America Internet Services  [phone]
Lines: 3
Message-ID: <[e-mail]>
References: <59mctu$[e-mail]>
NNTP-Posting-Host: oso.slonet.org
Mime-Version: 1.0
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To: Jack Kovar  KE0AX <[e-mail]>
In-Reply-To: <59mctu$[e-mail]>

Jack, regarding the U310 FET used in VHF pre-amps, be sure and use the
metal can version.  Plastic is OK for most HF versions.  73  Cliff K7RR



From [e-mail] Thu Jan 02 17:49:26 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.net!news.idt.net!mr.net!news-out.microserve.net!news-in.microserve.net!not-for-mail
From: [e-mail] (Steven Kerns)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Mitsubishi M57727 Power Module
Date: 24 Dec 1996 01:54:53 GMT
Organization: Penn Biomedical Support, Inc.
Lines: 10
Distribution: world
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X-Newsreader: WinVN 0.99.7

Sure wish it was a M67712!,

73 Steve
In article <[e-mail]>, [e-mail] says...
>
>If anyone needs a new, in the box, never used module, I have one I will
>send you via USMail for $40. That's about $20 below what you would pay
>at RF Parts.
>If interested contact Don, W9SL, via email or at 303/741-1503, anytime.



From [e-mail] Thu Jan 02 17:49:27 1997
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From: [e-mail] (Steven Kerns)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: MIRAGE B3016 preamp problem!
Date: 24 Dec 1996 01:58:52 GMT
Organization: Penn Biomedical Support, Inc.
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References: <59mctu$[e-mail]>
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Replace the pre-amp with a gasfet unit, Down East Microwave has a complete
board kit 18dbg <.6bnf for $25.  You should be able to fit it into the
B3016's case.  Down East's web address is http://www.downeastmicrowave.com

73 Steve N3FTI

In article <59mctu$[e-mail]>, [e-mail] says...
>
>        I have a MIRAGE B3016 2mtr amp/preamp that is giving me fits.
>
>        I seem to have a bad FET U309 "metal case three legs".
>
>        Diagram in book discribes it as a JFET J310 or U309.
>
>        I crossed J310 with a NTE326 or ECG326, Three legs plastic JFET.
>
>        Sound great right! Part is discribed as P channel General purpose
>
>        AF AMP.  I know my hearing range won't make it to 144mhz.
>
>        Circuit is  S is grounded, G is input with 120 ohm to ground,
>
>        D is output with .15 ohm and +13.6 vdc.
>
>        ANY ideas ?
>
>        The ECG/NTE shoots the top off like pinball machine!
>
>                                        Thanks,
>                                                Jack Kovar
>                                                   K0VAR
>                                                   Iowa
>
>



From [e-mail] Thu Jan 02 17:49:28 1997
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From: Ken Wells <[e-mail]>
Newsgroups: rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.amateur.misc
Subject: Re: Realistic WX alert radio mods??
Date: Mon, 23 Dec 1996 22:49:58 -0500
Organization: InterSource, Bloomington, IN
Lines: 66
Message-ID: <[e-mail]>
References: <petrocjw-1812961553150001@192.168.1.2> <59a15q$[e-mail]> <[e-mail]>
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The NWS WX receiver uses a 1050 Hz tone to activate.  S-Com repeater
controllers are easily set up to send this frequency tone.  I have thought
about doing the same conversion here in Paoli, IN.  But so far have not
had enough takers in the club.

73 de Ken - NM9P

[e-mail]



On Thu, 19 Dec 1996, Michael Black wrote:

> While you have that receiver open, can you give us any details of what's
> inside?  Years ago, I had a Radio Shack weather receiver, and it amounted
> to a FM BCB receiver, moved to the weather channel.  It was varactor
> tuned, and went to a 10.7MHz if.  The filtering there was only IF
> transformers, no ceramic filters.
>
> I had assumed that the weather receivers of today were a fancier design.
> But I bought some scrap hand held CB sets recently for parts, and their
> built in weather receivers had a single conversion design, and the crystal
> does not translate to any standard IF frequency. I need to do some more
> calculating to figure out what's going on.
>
> Is there a second conversion in that weather receiver?  You should be
> able to uncover that information by looking for a second crystal elsewhere
> on the circuit board.
>
> Are there any ceramic filters?  If the circuit fits the usual pattern,
> there'd be one at 10.7MHz (maybe marked with that number), which might
> look like a ceramic capacitor except it has three leads.  Then maybe
> there'd be another filter, in a square plastic package maybe, most likely
> running at 455KHz.  I have no idea whether this presumption is valid, but
> if it's a good quality receiver, then it probably would be double
> conversion 10.7MHz/455KHz and most likely at this date uses an IC
> for the IF strip, if not for the whole receiver.
>
> This information would be useful to others.  If the circuit is double
> conversion and uses ceramic filters, then they are well worth converting
> to 2M use, and would provide a cheap means of getting a 2M monitoring
> receiver, which many seem to desire.
>
> If it's a much simpler circuit, it still might be useful in some cases,
> but less so and not something that I'd spend much money on.
>
>      Michael  VE2BVW
>
>
>
>  In article <petrocjw-1812961553150001@192.168.1.2>, [e-mail].
edu (Joe Petrocy) says:
>  >
>  >   Just wondering if anyone has a good idea on how to mod a Realistic WX
>  >alert radio model 12-140. It seems to use one crystal as a reference for
>  >the 3 WX service frequencies. I would like to know if I could drop a
>  >crystal in there to reference something in the 147.00MHz range so I could
>  >tune it to rx 147.060 and others in the area. I am also curious what the
>  >tones are that actually set off the alarm. I would like to set it to go
>  >off if someone does a long-tone zero on our repeater. If I knew what the
>  >tones were that set it off, I could program our repeater controler to emit
>  >those tones after a LTZ.
>
>
>



From [e-mail] Thu Jan 02 17:49:30 1997
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From: Ken Wells <[e-mail]>
Newsgroups: alt.radio.pirate,rec.radio.amateur.homebrew
Subject: Re: Wanted: Plans for a radio jammer or spark gap transmitter
Date: Mon, 23 Dec 1996 22:56:04 -0500
Organization: InterSource, Bloomington, IN
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In Radio Shack's 200 in One electronic project kit there was a circuit for
a "spark" transmitter that used a relay, an audio transformer to step up
the voltage, and a coil and capacitor to tune to the AM broadcast band.
This little transmitter could be heard a number of feet away as it sent
morse code.  I remember building this on the spring-coil board in the kit
and it was fun .  (I was in Jr. Hi. at the time.)  I think the circuit is
still in the project kit.

Good luck.

Ken Wells - NM9P
[e-mail]



On Mon, 23 Dec 1996 [e-mail] wrote:

> I'm looking for some good plans for a spark gap transmitter or anything else
 that could be used for a medium range (20 to 200 feet) radio jammer. I've bee
n looking for some all today on the Internet with no luck, and if anyone has a
ny plans at all, e-mail me:  [e-mail] and I'd be greatfull. If you d
o reply to this, make sure to e-mail me as well because I don't get to read Us
enet newsgroups as often as I'd like to and I'm likely to miss the posting (es
pecially with Christmas coming up and all.) BTW, this is for IMFORMATIONAL PUR
POSES ONLY. Today's not the first day I've been looking for some plans, and I'
ve all but given up.
>
> -----
> [e-mail]
> -------------------==== Posted via Deja News ====-----------------------
>       http://www.dejanews.com/     Search, Read, Post to Usenet
>
>



From [e-mail] Thu Jan 02 17:49:31 1997
Path: news1.epix.net!news3.epix.net!uunet!in2.uu.net!169.132.11.200!news.idt.net!mr.net!news-out.microserve.net!news-in.microserve.net!not-for-mail
From: Jerry Booth <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Sell\Trade 4-1000A
Date: Mon, 23 Dec 1996 23:49:39 -0500
Organization: Microserve Information Systems (800)-380-INET
Lines: 7
Distribution: world
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Sell or trade 4-1000A RF deck. Dual vacuum tuning plate and load with
B&W 850 Tank. Tuned input and fully metered meters for Plate volts,
plate amps, grid mamps and RF output volts. 17W x 17D x16H. Front panel
18W X 17 H. Covers 80,40,20,15,10. Included full output 4-1000A and
sk506 chimney. Asking 550.00. Power supply available.

Jerry W0ZD


From [e-mail] Thu Jan 02 17:49:33 1997
Newsgroups: comp.arch.embedded,comp.robotics.misc,rec.radio.amateur.homebrew
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!arclight.uoregon.edu!feed1.news.erols.com!howland.erols.net!netcom.com!quartlow
From: [e-mail] (Len Turnbow)
Subject: Re: Source for Toshiba TC518512AFT-80V Pseudo SRAM?
Message-ID: <[e-mail]>
Followup-To: comp.arch.embedded,comp.robotics.misc,rec.radio.amateur.homebrew
Organization: NETCOM On-line Communication Services (408 261-4700 guest)
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Daniel Wee, 9V1ZV ([e-mail]) wrote:
: Hi,

:       I am having a hard time finding a source for the
: Toshiba TC518512AFT-80V 512kb Pseudo SRAM (flat pack) version.
: I would really appreciate it if someone here could tell
: me where I can get them in small quantities. Thanks in
: advance.

: 73 de 9V1ZV Daniel

: *------------+-------------------------------------+
: | Daniel Wee | [e-mail]          |
: | 9V1ZV      | [e-mail]               |
: | QRP-L #667 | [e-mail] |
: +------------+-------------------------------------+

And then Len said:

I had the same problem with a Hitachi PSRAM.
Hitachi dropped the part and replaced it with
a full static 512KB part.  I refer to Hitachi
P/N HM628512LFP-75L....


Are you sitting down?
In 400K [As in Four Hundred Thousand] piece lots,
the full static part is priced at US$ 30.00. (!)

Time to re-design using real DRAM, I think.
256 K SIMMs are now down around $5.00 full retail.
If you are not in commercial production mode, your
PC using friends will hand over their old 256K SIMMs
for next to nothing.
Doubt this helps.  Please e-mail me if you find out
a reasonable supplier of the full static 1/2 meg RAMs.

-- Len
--
[e-mail]


From [e-mail] Thu Jan 02 17:49:34 1997
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From: [e-mail] (Douglas P. McNutt)
Newsgroups: sci.electronics.design,sci.electronics.misc,rec,rec.radio.swap,rec.radio.amateur.homebrew
Subject: Re: Ideas for Low Frequency Tunable Filters
Date: Tue, 24 Dec 96 05:02:45 GMT
Organization: The MacNauchtan Lab
Lines: 14
Message-ID: <[e-mail]>
References: <59me5s$[e-mail]> <59mkdg$[e-mail]>
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In Article <59mkdg$[e-mail]>, [e-mail] (Frank
Miles) wrote:
>In article <59me5s$[e-mail]>,
>lbliao <[e-mail]> wrote:
>>I am looking for a low frequency tunable filter, in the range of 0.05Hz to
>>say 10Hz.

At that speed I wouldn't consider anything but a pure digital technique. You
wouldn't even need a DSP -  a PIC or 68HC11 come to mind. Once you get into
the digital domain you can program your filter characteristics and adjust
them to fit your application.


-> From the USA. The only socialist country that refuses to admit it. <-


From [e-mail] Thu Jan 02 17:49:35 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
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References: <[e-mail]>
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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 17:49:36 1997
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!mindspring!uunet!in1.uu.net!206.250.118.17!nntp.earthlink.net!usenet
From: "Christopher (Chris) W. Boone" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: UHF/VHF books
Date: Mon, 23 Dec 1996 22:02:55 -0800
Organization: ABC Radio Network Engineering - Dallas
Lines: 18
Message-ID: <[e-mail]>
References: <[e-mail]>
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If you have a "MicroCenter" computer store nearby, check out their
bookstore inside! I went to the north Dallas location...the PC prices
suck...BUT the BOOKs they had IMPRESSED me (and Im not easily impressed
by bookstores!)...

They had great books on microwave design, antenna, gear, etc...
Chris
WB5ITT

[e-mail] wrote:
>
> Can anybody point me at some good reference books for UHF/VHF design
> techniques.  I'm particularly interested in the gigahertz range
> circuitry.  Thanks
>
> Wade, N3JLA
>
> [e-mail]


From [e-mail] Thu Jan 02 17:49:37 1997
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From: [e-mail] (Jim Potter)
Newsgroups: alt.radio.pirate,rec.radio.amateur.homebrew
Subject: Re: Wanted: Plans for a radio jammer or spark gap transmitter
Date: Tue, 24 Dec 1996 07:15:50 GMT
Organization: JP Accelerator Works, Inc.
Lines: 34
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References: <[e-mail]>
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[e-mail] wrote:

>I'm looking for some good plans for a spark gap transmitter or anything else
that could be used for a medium range (20 to 200 feet) radio jammer. I've been
 looking for some all today on the Internet with no luck, and if anyone has an
y plans at all, e-mail me:  [e-mail] and I'd be greatfull. If you do
 reply to this, make sure to e-mail me as well because I don't get to read Use
net newsgroups as often as I'd like to and I'm likely to miss the posting (esp
ecially with Christmas coming up and all.) BTW, this is for IMFORMATIONAL PURP
OSES ONLY. Today's not the first day I've been looking for some plans, and I'v
e all but given up.
>
>-----
Many, many years ago in my college rooming house a couple students
felt annoyed by the loud music emanating from a nearby room.  After a
couple of beers they were inspired to a solution. There was an old
ac-dc radio in the attic. They rewired the radio so that the 50L6 was
the oscillator and lowered the frequency by paralleling the tuning
capacitor sections. The oscillator used cathode feedback, since it was
originally an oscillator-mixer. This meant that the plate should be
bypassed. They applied raw ac to the plate and let the ac line be the
bypass. This radiated enough rf into the power lines to replace the
annoying music with a raw 60 Hz buzz when the device was tuned to the
correct frequency. The offending radio belonged to an aspiring EE who
thought for a while that the electrolytics in his radio were going
out. He was, however, suspicious of the selective nature of the
problem. His suspicions were confirmed by the loud laughter coming
from the neigboring room. Details of his threats on the lives of the
conspirators are omitted. Likewise, the names of the perpetrators have
been omitted.

I am not sure if you need a narrow band device or a wideband device.
An extension of this technology to solid state seems unlikely.

Jim


James M. Potter, President              TEL: [phone]
JP Accelerator Works, Inc.              FAX: [phone]
2245 47th Street                        EMAIL: [e-mail]
Los Alamos, NM 87544-1604               URL: http://www.jpaw.com



From [e-mail] Thu Jan 02 17:49:39 1997
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From: [e-mail] (Greg Milligan)
Newsgroups: rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.amateur.misc,rec.radio.scanner,rec.radio.swap,alt.radio.scanner
Subject: Re: PRO 26 MOD ? is there one?
Date: Tue, 24 Dec 1996 10:38:52 +0000
Organization: Department of Clinical Neurology, University of Sheffield, Uk
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Message-ID: <[e-mail]>
References: <[e-mail]>
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In article <[e-mail]>, [e-mail] wrote:

> Is there a mod for cellular for the Pro 26?  I have one source that says
> there is.  I would like to get a few more references before I attempt
> it.  Any help would be greatly appreciated.  Thank you.
>
>
> Nick Yatko
> [e-mail]

Nick you can find various bits of info at the tandy support web site

http://support.tandy.com/support_electronics/15613.html


and a cell modification provided by Ross Voorhees (KB0PKT) at

http://www.zianet.com/kc5kto/mods/pro26cell.html

Hope this helps.
--
Greg Milligan

The University of Sheffield, Department of Clinical Neurology, Floor 'N',
Royal Hallamshire Hospital, Glossop Road, Sheffield S10 2JF, UK.
Tel: [phone]    Fax: [phone]   EMail:[e-mail]
World Wide Web: http://www.shef.ac.uk/uni/academic/A-C/cn/index.html
Amateur Radio (AX25 Packet Network): G1CPU@GB7WRG.#19.GBR.EU


From [e-mail] Thu Jan 02 17:49:40 1997
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From: Macarthur Drake <[e-mail]>
Newsgroups: rec.radio.shortwave,rec.radio.amateur.homebrew,aus.electronics,rec.antiques.radio+phono,uk.telecom,sci.physics,sci.physics.electromag,sci.electronics.design,sci.electronics.components,uk.radio.amateur,rec.music.makers.bass,sci.electronics.basics,sci.electronics.misc,alt.engineering.electrical,comp.lsi,comp.lsi.cad,news.answ
Subject: Variable Capacitor Simulation
Date: Tue, 24 Dec 1996 04:18:42 -0800
Organization: Cleveland State University
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I have worked on creating a varable capacitor or an element
that behaves a such. I need this element for a circuit simulation program, I
don't need such an element in real life. I need to be able to set the
capacitace to a function of time like c(t) = 2+(10*sin 6*time). The
capacitace should be able to be set to any mathmatical function and take on
any value. As you know a varable capacitor will  create a current that is a
function of the capacitace, dervitive of the capacitace,
voltage and dervitive of the voltage. I have has some luck
with a collection of elements, however while the current that
these elements is correct for a variable capacitor the voltage turns out to
be scaled. I need to be able to set the initial charge on the variable
capacitor also.

Does any one have experiance in creating such an element with
pspice or any other circuit simulation program? I have been tipped to try
analog behavior modeling, but so far I have had much sucess. Any help, such
as clues or pointer to other sources or anything eles is more than welcomed.
Please resond to my email address.

        differentiating the following equation:

q = c(t)*v(t)

        the current from a variable capacitor would look like:

i = c(t)*v'(t)+c'(t)*v(t)

                Thanks,
                Macarthur Drake
                [e-mail], [e-mail]


From [e-mail] Thu Jan 02 17:49:42 1997
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From: [e-mail] (R. L. Measures )
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: Tue, 24 Dec 1996 05:06:41 -0800
Organization: Internet Access of Ventura County
Lines: 64
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]> <59jt54$[e-mail]>
NNTP-Posting-Host: port27.vcnet.com

In article <59jt54$[e-mail]>, [e-mail] (Phil
Clements) wrote:

> In article <[e-mail]>,
[e-mail] says:
> >
> >snip...
> >
> >During three or four periods of time in the 80's, Eimac had trouble with
> >8877's. That's what drove ETO out of the contract business with GE
> >medical, they couldn't get reliable tubes either. I remember visiting ETO
> >and discussing the problem with Ray Heaton.
> >
>
>  This is a well known fact...the problem was so bad that a procedure was
>  set up between Eimac and GE Medical to specially select 8877 tubes to be
>  used in GE MRI machines. The "selection" criteria is a gray area at the
>  moment, as Eimac has refused to answer my inquiries about the process.
>  This is obviously done at the Eimac factory before delivery to GE and its
>  MRI amplifier suppliers. In the late 1980's, after the "selection" program
>  began. 8877 tubes appeared on the market (even as OEM units in Alpha amps)
>  that were in plain brown boxes with blue labels marked "Industrial Tube".
>  The tubes themselves were no longer labeled 8877, but "YU158". This process
>  continues to this day. I suppose GE and ETO do not intend to get stung agai
n!
>  If you inquire at Eimac, they will tell you the YU158 is a "selected" tube,
>  and is completely compatible with any 8877 application. I have tested sever
al
>  YU158's, and my experience is that the tubes put out the same power as the
>  8877, but with slightly less plate current, much less grid current, and
>  therefore less exhaust plenum temperature.
>
>  snip....
> >
> >That problem nearly ruined sales of the 8877, and put ETO virtually out of
> >the medical MRI business. People are still shy of the 8877 because of
> >those 1980's problems.
> >
I don't think the problem is entirely Eimac's.  To the best of my
knowledge, neither Dick Erhorn or Ray Heaton has ever tested a failed 8877
or YU158 for the presence of gold melt-balls.

The (Joe D. Funderburg, W6IHA) test for loose gold is simple and non
destructive.  The test:  The anode is up, the base is down, no heater
voltage present.  Apply double the rated anode v between the anode and the
grid.  The anode is positive and grid is negative.  Measure the leakage
current.  Reverse polarity.  If the leakage current remains the same with
the anode negative, no loose gold is present.  If the leakage current
decreases markedly, the presence of gold melt-balls is indicated.

If anyone has a failed 8877 or YU158, or 3CX800A7 and you would like to
have me test it for the presence of gold melt-balls/gold sputtering, I
would be happy to test it and report the results here.  If so permitted, I
would like to photograph the insides of the failed 8877 or YU158 and
publish the photos on the Internet for all to see.  (a color photo of an
8877 that failed from gold-sputtering is shown on page 16 of the Sept.
1990 isue of QST magazine)

IMO, the thing that cost Dick Erhorn his MRI amplifier contract with GE
Medical was NIH syndrome.  According to a letter I received from Erhorn in
1990, he has made up his mind that ALL 8877 failures are Eimac's fault.
--------------------------------
e-mail copy to Mr. Clements

--
--Rich-- ag6k, 805-386-3734


From [e-mail] Thu Jan 02 17:49:43 1997
Path: news1.epix.net!news3.epix.net!uunet!in3.uu.net!38.8.16.2!psinntp!psinntp!pubxfer.news.psi.net!usenet
From: "Larry J. Robison" <[e-mail]>
Newsgroups: alt.radio.pirate,rec.radio.amateur.homebrew
Subject: Re: Wanted: Plans for a radio jammer or spark gap transmitter
Date: 24 Dec 1996 13:07:20 GMT
Organization: Robison and Associates
Lines: 8
Message-ID: <01bbf19b$62523440$ce04fa26@larry>
References: <[e-mail]>
NNTP-Posting-Host: 38.250.4.206
X-Newsreader: Microsoft Internet News 4.70.1155
Xref: news1.epix.net alt.radio.pirate:22128 rec.radio.amateur.homebrew:22339

Before replying to this guy why don't somebody ask what he wants it for and
find out if he lives next door to me .. or you?  Sheech it takes all
kinds..

[e-mail] wrote in article <[e-mail]>...
> I'm looking for some good plans for a spark gap transmitter or anything
else that could be used for a medium range (20 to 200 feet) radio jammer.



From [e-mail] Thu Jan 02 17:49:44 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.idt.net!news.bbnplanet.com!cam-news-hub1.bbnplanet.com!uunet!in2.uu.net!199.171.190.20!news.deltanet.com!news.deltanet.com!jlundgre
From: [e-mail] (John Lundgren)
Newsgroups: alt.radio.pirate,rec.radio.amateur.homebrew
Subject: Re: Wanted: Plans for a radio jammer or spark gap transmitter
Followup-To: alt.radio.pirate,rec.radio.amateur.homebrew
Date: 24 Dec 1996 13:14:19 GMT
Organization: Delta Internet Services, Anaheim, Ca
Lines: 57
Message-ID: <59okvb$[e-mail]>
References: <[e-mail]> <[e-mail]>
NNTP-Posting-Host: delta1.deltanet.com
X-Newsreader: TIN [version 1.2 PL2]
Xref: news1.epix.net alt.radio.pirate:22132 rec.radio.amateur.homebrew:22355

Jim Potter ([e-mail]) wrote:
: [e-mail] wrote:

: >I'm looking for some good plans for a spark gap transmitter or anything els
e that could be used for a medium range (20 to 200 feet) radio jammer. I've be
en looking for some all today on the Internet with no luck, and if anyone has
any plans at all, e-m
ail me:  [e-mail] and I'd be greatfull. If you do reply to this, mak
e sure to e-mail me as well because I don't get to read Usenet newsgroups as o
ften as I'd like to and I'm likely to miss the posting (especially with Christ
mas coming up and all
.) BTW, this is for IMFORMATIONAL PURPOSES ONLY. Today's not the first day I'v
e been looking for some plans, and I've all but given up.
: >
: >-----
: Many, many years ago in my college rooming house a couple students
: felt annoyed by the loud music emanating from a nearby room.  After a
: couple of beers they were inspired to a solution. There was an old
: ac-dc radio in the attic. They rewired the radio so that the 50L6 was
: the oscillator and lowered the frequency by paralleling the tuning
: capacitor sections. The oscillator used cathode feedback, since it was
: originally an oscillator-mixer. This meant that the plate should be
: bypassed. They applied raw ac to the plate and let the ac line be the
: bypass. This radiated enough rf into the power lines to replace the
: annoying music with a raw 60 Hz buzz when the device was tuned to the
: correct frequency. The offending radio belonged to an aspiring EE who
: thought for a while that the electrolytics in his radio were going
: out. He was, however, suspicious of the selective nature of the
: problem. His suspicions were confirmed by the loud laughter coming
: from the neigboring room. Details of his threats on the lives of the
: conspirators are omitted. Likewise, the names of the perpetrators have
: been omitted.

: I am not sure if you need a narrow band device or a wideband device.
: An extension of this technology to solid state seems unlikely.

: Jim

Except for the high voltages, the exact same thing could be done with
solid state components.

Actually, with high voltages, the transistors can be operated in the
avalanche mode, giving pulses with short risetimes when avalanching, and
causing a lot of harmonics to be generated.  Lotsa RFI.

: James M. Potter, President            TEL: [phone]
: JP Accelerator Works, Inc.            FAX: [phone]
: 2245 47th Street                              EMAIL: [e-mail]
: Los Alamos, NM 87544-1604             URL: http://www.jpaw.com


--
#===================================================================#
|    John Lundgren - Elec Tech - Info Tech Svcs. |    jlundgre@     |
|    Rancho Santiago Community College District  |   deltanet.com   |
|     17th St at Bristol \ Santa Ana, CA 92706   | http://www.rancho|
| My opinions are my own, and not my employer's. |    .cc.ca.us     |
|   Most FAQs are available through Thomas Fine's WWW FAQ archive:  |
|http://www.cis.ohio-state.edu:80/hypertext/faq/usenet/FAQ-List.html|
|     "Babe Ruth struck out 1,330 times...  keep on swinging."      |
|     says the lid on the jar of Laredo & Lefty's Picante Salsa     |
!  You MAY NOT use my email address for unsolicited Email or lists! !
#======P=G=P==k=e=y==a=v=a=i=l=a=b=l=e==u=p=o=n==r=e=q=u=e=s=t======#



From [e-mail] Thu Jan 02 17:49:46 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!cpk-news-hub1.bbnplanet.com!news.bbnplanet.com!cam-news-hub1.bbnplanet.com!uunet!in2.uu.net!199.171.190.20!news.deltanet.com!news.deltanet.com!jlundgre
From: [e-mail] (John Lundgren)
Newsgroups: alt.radio.pirate,rec.radio.amateur.homebrew
Subject: Re: Wanted: Plans for a radio jammer or spark gap transmitter
Followup-To: alt.radio.pirate,rec.radio.amateur.homebrew
Date: 24 Dec 1996 13:15:30 GMT
Organization: Delta Internet Services, Anaheim, Ca
Lines: 25
Message-ID: <59ol1i$[e-mail]>
References: <[e-mail]> <01bbf19b$62523440$ce04fa26@larry>
NNTP-Posting-Host: delta1.deltanet.com
X-Newsreader: TIN [version 1.2 PL2]
Xref: news1.epix.net alt.radio.pirate:22133 rec.radio.amateur.homebrew:22356

Larry J. Robison ([e-mail]) wrote:
: Before replying to this guy why don't somebody ask what he wants it for and
: find out if he lives next door to me .. or you?  Sheech it takes all
: kinds..

: [e-mail] wrote in article <[e-mail]>...
: > I'm looking for some good plans for a spark gap transmitter or anything
: else that could be used for a medium range (20 to 200 feet) radio jammer.

Well, you chopped off the part where he said it was 'for informational
purposes only'.  Yeah, right.

--
#===================================================================#
|    John Lundgren - Elec Tech - Info Tech Svcs. |    jlundgre@     |
|    Rancho Santiago Community College District  |   deltanet.com   |
|     17th St at Bristol \ Santa Ana, CA 92706   | http://www.rancho|
| My opinions are my own, and not my employer's. |    .cc.ca.us     |
|   Most FAQs are available through Thomas Fine's WWW FAQ archive:  |
|http://www.cis.ohio-state.edu:80/hypertext/faq/usenet/FAQ-List.html|
|     "Babe Ruth struck out 1,330 times...  keep on swinging."      |
|     says the lid on the jar of Laredo & Lefty's Picante Salsa     |
!  You MAY NOT use my email address for unsolicited Email or lists! !
#======P=G=P==k=e=y==a=v=a=i=l=a=b=l=e==u=p=o=n==r=e=q=u=e=s=t======#



From [e-mail] Thu Jan 02 17:49:47 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!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!newsfeed.internetmci.com!in2.uu.net!199.171.190.20!news.deltanet.com!news.deltanet.com!jlundgre
From: [e-mail] (John Lundgren)
Newsgroups: alt.radio.pirate,rec.radio.amateur.homebrew
Subject: Re: Wanted: Plans for a radio jammer or spark gap transmitter
Followup-To: alt.radio.pirate,rec.radio.amateur.homebrew
Date: 24 Dec 1996 13:19:13 GMT
Organization: Delta Internet Services, Anaheim, Ca
Lines: 43
Message-ID: <59ol8h$[e-mail]>
References: <[e-mail]> <59p6d8$[e-mail]>
NNTP-Posting-Host: delta1.deltanet.com
X-Newsreader: TIN [version 1.2 PL2]
Xref: news1.epix.net alt.radio.pirate:22134 rec.radio.amateur.homebrew:22357

Si Ballenger ([e-mail]) wrote:
: [e-mail] wrote:

: >I'm looking for some good plans for a spark gap transmitter or anything
else that could be used for a medium range (20 to 200 feet) radio jammer.
I've been looking for some all today on the Internet with no luck, and if
anyone has any plans at all, e-m ail me:  [e-mail] and I'd be
greatfull. If you do reply to this, make sure to e-mail me as well because
I don't get to read Usenet newsgroups as often as I'd like to and I'm
likely to miss the posting (especially with Christmas coming up and all .)
BTW, this is for IMFORMATIONAL PURPOSES ONLY. Today's not the first day
I've been looking for some plans, and I've all but given up.

: >-----
: >[e-mail]
: >-------------------==== Posted via Deja News ====-----------------------
: >      http://www.dejanews.com/     Search, Read, Post to Usenet

: For a spark gap generator, you may have a 4, 6, or 8 cylinder model sitting
in
: the drive way. Just remember that you need to have your life and property
: insurance up to date!

Hay, I've got a problem.  I looked at my engine the other day when I was
changing oil.  Mebbe you could tell me what's wrong.  I have a 4 cylinder
Ford ranger, and I counted four spark plugs on one side of the engine.
Then I looked on the other side of the engine and there were four more.
It doesn't have a distributor either.

Real strange, huh?

--
#===================================================================#
|    John Lundgren - Elec Tech - Info Tech Svcs. |    jlundgre@     |
|    Rancho Santiago Community College District  |   deltanet.com   |
|     17th St at Bristol \ Santa Ana, CA 92706   | http://www.rancho|
| My opinions are my own, and not my employer's. |    .cc.ca.us     |
|   Most FAQs are available through Thomas Fine's WWW FAQ archive:  |
|http://www.cis.ohio-state.edu:80/hypertext/faq/usenet/FAQ-List.html|
|     "Babe Ruth struck out 1,330 times...  keep on swinging."      |
|     says the lid on the jar of Laredo & Lefty's Picante Salsa     |
!  You MAY NOT use my email address for unsolicited Email or lists! !
#======P=G=P==k=e=y==a=v=a=i=l=a=b=l=e==u=p=o=n==r=e=q=u=e=s=t======#



From [e-mail] Thu Jan 02 17:49:48 1997
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!news-out.communique.net!uunet!in1.uu.net!160.45.4.4!fu-berlin.de!news.apfel.de!nntp.uio.no!news-feed.inet.tele.dk!xara.net!emerald.xara.net!dispatch.news.demon.net!demon!tenchy.demon.co.uk!tenchy.demon.co.uk!Steve
From: Steve <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Kenwood TR7600 questions
Date: Tue, 24 Dec 1996 15:14:56 +0000
Organization: Moi
Lines: 15
Distribution: world
Message-ID: <jBe4NDAwN$[e-mail]>
NNTP-Posting-Host: tenchy.demon.co.uk
X-NNTP-Posting-Host: tenchy.demon.co.uk
MIME-Version: 1.0
X-Newsreader: Turnpike Version 3.01 <slbp1D4nwJ5LTEgPRZqS0mg1zO>

Hi,

A while back I bought a secondhand Kenwood TR7600 with some other stuff.

First question, to UK peeps, is, the rig covers 144-148,presumably on TX
as well as RX (not actually used it yet), is it legal to own ?????

And are there mods to get in between the 5KHz spacings ?? Beacause the
plan is to replace my multimode with it on packet, and sell the
multimode (ICOM IC260E), but our BBS is likely to be going to a 144.xx25
frequency when they implement the new spacing.

Cheers
--
Steve  FOR SALE: Suzuki GSX1100EFE,D reg,only 12500miles,XGC,MOT'd.


From [e-mail] Thu Jan 02 17:49:49 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-atl-21.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!news.mindspring.com!usenet
From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: 24 Dec 1996 15:26:21 GMT
Organization: lack thereof
Lines: 7
Message-ID: <59osmt$[e-mail]>
References: <[e-mail]> <[e-mail]> <[e-mail]>
NNTP-Posting-Host: user-168-121-31-161.dialup.mindspring.com
X-Newsreader: TIN [version 1.2 PL2]

Question for the fellow that is posting this thread on his web site:

Do you have time to distill the trash from the technical discussion and just
post that?  Also considered trash (IMHO) is repeating the same thing over
and over.  It is an interesting thread, and I would like to keep a copy of
the highlights.  Thanks -- Bobby kr4bu



From [e-mail] Thu Jan 02 17:49:50 1997
Path: news1.epix.net!news3.epix.net!uunet!in2.uu.net!205.252.116.190!feed1.news.erols.com!howland.erols.net!news.sprintlink.net!news-peer.sprintlink.net!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,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
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.01 (Win95; I)
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 17:49:51 1997
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.sprintlink.net!news-peer.sprintlink.net!news.sprintlink.net!news-pull.sprintlink.net!news.sprintlink.net!news-atl-21.sprintlink.net!svr1.pdx.gstis.net!news.callamer.com![e-mail]
From: [e-mail] (Jerry Parker)
Newsgroups: rec.radio.amateur.homebrew
Subject: Small Wonder Labs Catalog online
Date: Tue, 24 Dec 1996 17:12:41 GMT
Organization: Call America Internet Services  [phone]
Lines: 8
Message-ID: <59p2k7$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: cts1-034.snlo.dialup.fix.net
X-Newsreader: Forte Free Agent 1.0.82

Dave Benson's Small Wonder Labs now has an Web Page with all the
latest offerings.

Check out the new SSB Kits.

73'es,,,Jerry...K




From [e-mail] Thu Jan 02 17:49:51 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-pull.sprintlink.net!news.sprintlink.net!news-atl-21.sprintlink.net!svr1.pdx.gstis.net!news.callamer.com![e-mail]
From: [e-mail] (Jerry Parker)
Newsgroups: rec.radio.amateur.homebrew
Subject: Internet Address
Date: Tue, 24 Dec 1996 17:15:05 GMT
Organization: Call America Internet Services  [phone]
Lines: 15
Message-ID: <59p2om$[e-mail]>
References: <59p2k7$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: cts1-034.snlo.dialup.fix.net
X-Newsreader: Forte Free Agent 1.0.82

[e-mail] (Jerry Parker) wrote:

>Dave Benson's Small Wonder Labs now has an Web Page with all the
>latest offerings.

>Check out the new SSB Kits.

>73'es,,,Jerry...K


http://www.fix.net/~jparker/sml.html


]



From [e-mail] Thu Jan 02 17:49:53 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!newsxfer2.itd.umich.edu!uunet!in1.uu.net!205.228.248.26!news.vcnet.com!port13.vcnet.com!user
From: [e-mail] (R. L. Measures )
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: Tue, 24 Dec 1996 09:41:59 -0800
Organization: Internet Access of Ventura County
Lines: 35
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]> <[e-mail]>
NNTP-Posting-Host: port13.vcnet.com

In article <[e-mail]>,
[e-mail] (R. L. Measures ) wrote:

> In article <[e-mail]>,
> [e-mail] wrote:
>
> > In article <[e-mail]>, Andy Heninger
> > <[e-mail]> writes:
> >
> > >First, there is no difference between a tube in an "oscillation
> > >condition" and a non-oscillating amplifier, so far as the tube itself
> > >and its ratings are concerned.
> >
> > Andy
> >
> > I would have to disagree with this statement.  The assumption being
> > the "non-oscillating amplifier" would be properly tuned and loaded
> > and the tube operating within rated specifications.
> >
> > In a VHF "oscillation condition" what mechanism exists to provide
> > a proper load for the generated VHF RF energy  in an HF
> > amplifier?  What would limit the tube's dissipation, or RF voltages?
> >
> This afternoon I tested David Holtcamp's TL-922 tune capacitor.  The
> breakdown voltage was about 6100V.  David observed that this capacitor
> arced during operation on the CW tap.  The HF voltage present on the CW
> tap is around 2000V  IMO, the intermittent arcing of the 6000v+ tune cap.
> was due to a largely-unloaded VHF parasitic oscillation.
>
> --
Wrong again, Rich.  David just informed me that the mysterious arcing was
apparently NOT due to a VHF oscillation in the TL-922.

--
--Rich-- ag6k, 805-386-3734


From [e-mail] Thu Jan 02 17:49:55 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.idt.net!news.bbnplanet.com!cam-news-hub1.bbnplanet.com!howland.erols.net!cliffs.rs.itd.umich.edu!portc01.blue.aol.com!newstf02.news.aol.com!audrey01.news.aol.com!not-for-mail
From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: 24 Dec 1996 18:07:42 GMT
Organization: AOL http://www.aol.com
Lines: 58
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] (R. L. Measures ) writes another story:

>This afternoon I tested David Holtcamp's TL-922 tune capacitor.  The
>breakdown voltage was about 6100V.  David observed that this capacitor
>arced during operation on the CW tap.  The HF voltage present on the CW
>tap is around 2000V  IMO, the intermittent arcing of the 6000v+ tune cap.
>was due to a largely-unloaded VHF parasitic oscillation.
>--Rich-- ag6k, 805-386-3734

Perhaps this will give us insight into your claims and measurements.

In article <[e-mail]>,
[e-mail] (R. L. Measures ) writes:

> Yeah, that's what you were banking on, but it didn't work    I phoned
>Eimac's Salt Lake City division at  801-972-5000.  I explained what has
>been taking place in this debate.  I said that certain claims about Mr.
>Miklos were being made in his absence, and that I would like to verify
>these claims.  We are hardly talking about national defense secrets.
>
>Under normal circumstances, Tom, you might have gotten away with it.
>However, there were some unseen factors at work that may have upset your
>apple cart.
>
> In my family, there are two pathological liars, so I am familiar with
how
>such individuals operate.  Briefly, EVERYTHING these indivuals say needs
>to be investigated.  When one lie gets exposed, they often tell another
>lie to cover the previous lie, on and on.  .
>Do you feel that Mr. Rauch's prevarication about Eimac/Salt Lake City.
>ex-employee Mr. Miklos was justified?

In article <[e-mail]>,
[e-mail] (R. L. Measures ) writes:

>Untruthfulness is probably the surest way to loose public support---and
>the fastest way to ruin one's chances of winning a public debate.

Suddenly someone posted:
In article <[e-mail]>,
[e-mail] writes:

>In the late 80's I had problems with some Eimac tubes. When I called
Eimac
>they transfered me to the manager of tube engineering at Varian. His name
>was Miklos.

>In 1990 I went to the NAB show. I met a ham wa4gpm who worked VHF DX. His
>name was Miklos and his card said R and D manager. He was there with John
>Button from Varian.

And of course Ian indicated a VHF handbook lists Buzz as R+D manager.

Rich, I can't speak for the other people, but I've completely lost faith
in your words.

73, Tom


From [e-mail] Thu Jan 02 17:49:56 1997
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!news.mindspring.com!usenet
From: "Timothy S. Powell" <[e-mail]>
Newsgroups: rec.radio.amateur.digital.misc,alt.ham-radio.ssb,rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.amateur.space
Subject: Kits for phase-3D?
Date: Tue, 24 Dec 1996 10:08:42 -0800
Organization: MindSpring Enterprises, Inc.
Lines: 11
Message-ID: <[e-mail]>
NNTP-Posting-Host: user-168-121-33-127.dialup.mindspring.com
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Server-Date: 24 Dec 1996 23:25:29 GMT
X-Mailer: Mozilla 3.01 (Win16; I)
Xref: news1.epix.net rec.radio.amateur.digital.misc:20858 rec.radio.amateur.equipment:44996 rec.radio.amateur.homebrew:22358 rec.radio.amateur.space:9202

Does anyone know of any 6-meter, 2-meter and 70-cm SSB kits that would
be good to use for the Phase-3D sat when it gets in orbit.  I'm a
college student with limited funds.  I would like to work the sat when
it get up but can not buy the high price equipment that is needed but
would like to build a small sat station if possible.

Thanks


Timothy
KD4IKY


From [e-mail] Thu Jan 02 17:49:58 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!insync!uunet!in1.uu.net!206.112.192.109!newsfeed.one.net!news.one.net!default
From: [e-mail] (Jack Giehl)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: Tue, 24 Dec 96 18:09:07 GMT
Organization: .
Lines: 33
Message-ID: <59p66e$[e-mail]>
References: <[e-mail]> <[e-mail]> <[e-mail]> <01bbf1bb$53725200$[e-mail]>
NNTP-Posting-Host: port-11-24.access.one.net
X-Newsreader: News Xpress 2.0 Beta #2

In article <01bbf1bb$53725200$[e-mail]>, "David B. Hol
tkamp (K5KH)" <[e-mail]> wrote:
>Dear Rich, Tom and all others who've helped me here,
>
>  You might remember me -- I'm the fellow with the TL-922 that was
>experiencing intermittent arcing. Rich (especially), Tom and several others
>tried very hard to help me out.

David,

I had a TL-922 about 10 years ago.  I was concerned that there was a gas
discharge arc suppressor across the output, and that the manual warned about
running CW with the amp in the SSB mode.

After several months of operation on 75 meters running SSB with vox,
arcing started to occur.  To my dismay I discovered that the band switch was
arcing.  The 40 meter switch connection was badly burned and unusable.  On
further investigation, I discovered the cause for this was that the RF input
and output switching was performed by a rather large SLOW relay.  At the same
time, another relay was activated that enabled the bias and switched the front

panel lights.  The problem was that the RF relay was still experiencing
contact bouncing with drive applied and bias enabled!

I solved the problem by removing the large relay, replacing it with a P&B 3PDT
110 VDC relay, with two of the poles performing the RF switching, and the
third pole used to key the other relay.

The amp NEVER arced again, and the P&B relay was much quieter.  I was also
able to run the amp with CW in the SSB mode with no arcing.

Kenwood has made a lot of money selling replacement band switches for TL-922
amps.

Jack, WB8BFS


From [e-mail] Thu Jan 02 17:49:59 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-pull.sprintlink.net!news.sprintlink.net!news-pen-4.sprintlink.net!ralph.vnet.net!news
From: [e-mail] (Si Ballenger)
Newsgroups: alt.radio.pirate,rec.radio.amateur.homebrew
Subject: Re: Wanted: Plans for a radio jammer or spark gap transmitter
Date: Tue, 24 Dec 1996 18:11:49 GMT
Organization: maybe later...
Lines: 13
Message-ID: <59p6d8$[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: shb.vnet.net
X-No-Archive: Yes
X-Newsreader: Forte Free Agent 1.0.82
Xref: news1.epix.net alt.radio.pirate:22129 rec.radio.amateur.homebrew:22347

[e-mail] wrote:

>I'm looking for some good plans for a spark gap transmitter or anything else
that could be used for a medium range (20 to 200 feet) radio jammer. I've been
 looking for some all today on the Internet with no luck, and if anyone has an
y plans at all, e-mail me:  [e-mail] and I'd be greatfull. If you do
 reply to this, make sure to e-mail me as well because I don't get to read Use
net newsgroups as often as I'd like to and I'm likely to miss the posting (esp
ecially with Christmas coming up and all.) BTW, this is for IMFORMATIONAL PURP
OSES ONLY. Today's not the first day I've been looking for some plans, and I'v
e all but given up.

>-----
>[e-mail]
>-------------------==== Posted via Deja News ====-----------------------
>      http://www.dejanews.com/     Search, Read, Post to Usenet

For a spark gap generator, you may have a 4, 6, or 8 cylinder model sitting in
the drive way. Just remember that you need to have your life and property
insurance up to date!



From [e-mail] Thu Jan 02 17:50:00 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.idt.net!feed1.news.erols.com!insync!uunet!in2.uu.net!206.149.24.18!excalibur.flash.net!not-for-mail
From: [e-mail] (Jim Chandler)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Small Wonder Labs Catalog online
Date: Tue, 24 Dec 1996 18:35:42 GMT
Organization: Flashnet Communications, http://www.flash.net
Lines: 13
Message-ID: <[e-mail]>
References: <59p2k7$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: ssh2-95.flash.net
X-Newsreader: Forte Free Agent 1.1/32.230

And the URL for the page is......?

[e-mail] (Jerry Parker) wrote:

>Dave Benson's Small Wonder Labs now has an Web Page with all the
>latest offerings.
>
>Check out the new SSB Kits.
>
>73'es,,,Jerry...K
>
>



From [e-mail] Thu Jan 02 17:50:01 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!news.kei.com!newsfeed.internetmci.com!in3.uu.net!205.228.248.26!news.vcnet.com!port13.vcnet.com!user
From: [e-mail] (R. L. Measures )
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: Tue, 24 Dec 1996 10:53:31 -0800
Organization: Internet Access of Ventura County
Lines: 21
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]> <[e-mail]> <59osmt$[e-mail]>
NNTP-Posting-Host: port27.vcnet.com

In article <59osmt$[e-mail]>, [e-mail] wrote:

> Question for the fellow that is posting this thread on his web site:
>
> Do you have time to distill the trash from the technical discussion and just
> post that?  Also considered trash (IMHO) is repeating the same thing over
> and over.  It is an interesting thread, and I would like to keep a copy of
> the highlights.  Thanks -- Bobby kr4bu

Surely you jest, Bobby.  There's too much stuff to sort out.   Even if
somebody tried to distill the discussion, that might start a fresh new
debate over the content of the distilled version.

IMO, the essence of this debate is that one side believes:

1.   That virtually no VHF current flows in a VHF suppressor's inductor.
2.  Nickle-chromium-iron alloys are extremely lossy at 28MHz, yet such
alloys are virtually lossless at 100MHz.

--
--Rich-- ag6k, 805-386-3734


From [e-mail] Thu Jan 02 17:50:02 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.homebrew
Subject: Re: Small Wonder Labs Catalog online
Date: 24 Dec 1996 18:57:13 GMT
Organization: Rocky Mountain Internet - (800) 900-RMII
Lines: 5
Message-ID: <59p929$[e-mail]>
References: <59p2k7$[e-mail]>
NNTP-Posting-Host: rainbow.rmii.com
X-Newsreader: TIN [version 1.2 PL2]

Jerry Parker ([e-mail]) wrote:
: Dave Benson's Small Wonder Labs now has an Web Page with all the
: latest offerings.

...and, it is? ??   ???    ????     ?????      ??????


From [e-mail] Thu Jan 02 17:50:03 1997
Path: news1.epix.net!news3.epix.net!uunet!in2.uu.net!204.177.71.9!viper.shadow.net!usenet
From: [e-mail] (cRiTTa66)
Newsgroups: alt.radio.amateur,alt.radio.amateur.club,alt.radio.amateur.club.clarc,rec.ham-radio,rec.ham-radio.swap,rec.radio.amateur,rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.amateur.misc
Subject: Re: Mods to the Yaesu FT-50R
Date: Tue, 24 Dec 1996 19:19:11 GMT
Organization: iNdependent
Lines: 17
Message-ID: <32c02ca0.1272252@news>
References: <01bbed10$e0380d10$d787c7cd@sci> <59bluu$[e-mail]>
NNTP-Posting-Host: ppp-mia-72.shadow.net
X-Newsreader: Forte Agent .99e/32.227
Xref: news1.epix.net rec.radio.amateur.equipment:44985 rec.radio.amateur.homebrew:22348 rec.radio.amateur.misc:121586

http://www.shadow.net/~critta66/ft50.html


On Thu, 19 Dec 1996 15:08:32 GMT, [e-mail] (Gary Hosler)
wrote:

>"Program / Case Manager" <[e-mail]> wrote:
>
>>Anyone know of mods to the Yaesu FT-50R?
>
>What is it that you are trying to modify?  Something not working
>properly?  Could you be a bit more specific?
>
>de KN0Z  Gary
>
>Opinions expressed herein are my own and may not represent those of my employ
er.



From [e-mail] Thu Jan 02 17:50:04 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!howland.erols.net!newsfeed.internetmci.com!newsfeed.direct.ca!nntp.portal.ca!news.bc.net!rover.ucs.ualberta.ca!news.agtac.net!news.oanet.com!usenet
From: Gerald Caouette <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew,sci.electronics.design
Subject: Re: Wanted: Tips for constructing water cooled load
Date: Tue, 24 Dec 1996 11:53:50 -0800
Organization: Central News Services
Lines: 21
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]> <[e-mail]>
NNTP-Posting-Host: dialin35.oanet.com
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 2.01 (Win16; U)
CC: [e-mail]
Xref: news1.epix.net rec.radio.amateur.homebrew:22334 sci.electronics.design:28679

Jim Potter

Jim you might want to look at heating elements
the coaxial type wire inside a stainless steel jacket
simalar to the tye used in most modern oven ranges.

Cromalox and Hotwatt come to mind as a supplier of the
raw element stock and if one gets all their material and dimensional
data it might be possible to find a jacket/wire combination that will
also have close to the 250 ohm desired impedance then just immerse in
the coolant of your choice.

probably not much help
but
Merry Xmas
73
de
[e-mail]
QRV
3.7 CW evenings



From [e-mail] Thu Jan 02 17:50:05 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!newsfeed.internetmci.com!in2.uu.net!198.68.191.16!news.accessone.com!news
From: [e-mail] (Ed Mitchell)
Newsgroups: rec.radio.amateur.misc,rec.radio.amateur.digital.misc,rec.radio.amateur.policy,rec.radio.amateur.homebrew
Subject: www.hamradio-online.com: FCC postpones RF safety rules until September 1997
Date: 24 Dec 1996 20:48:27 GMT
Organization: Virtual Publishing Co.
Lines: 13
Message-ID: <59pfir$[e-mail]>
NNTP-Posting-Host: vbook.accessone.com
X-Newsreader: WinVN 0.99.5
Xref: news1.epix.net rec.radio.amateur.misc:121604 rec.radio.amateur.digital.misc:20856 rec.radio.amateur.policy:44621 rec.radio.amateur.homebrew:22354

The FCC, respondig to numerous petitions filed by the ARRL and other
organizations has postponed implementation of the new RF safety rules until
September 1997. Under the new rules, Amateurs must certify the RF safety of
their stations if they operate at 50 watts or more output power.

The complete story is available at http://www.hamradio-online.com

------------------------
Ed (KF7VY) and Kim (N7VPL) Mitchell
email to [e-mail]
Visit Ham Radio Online, it's free! at
http://www.hamradio-online.com



From [e-mail] Thu Jan 02 17:50:05 1997
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!news.bbnplanet.com!su-news-hub1.bbnplanet.com!newsfeed.internetmci.com!in2.uu.net!198.68.191.16!news.accessone.com!news
From: [e-mail] (Ed Mitchell)
Newsgroups: rec.radio.amateur.misc,rec.radio.amateur.digital.misc,rec.radio.amateur.policy,rec.radio.amateur.homebrew,rec.radio.scanner,rec.radio.shortwave,aus.radio.amateur.misc,aus.radio.amateur.digital
Subject: www.hamradio-online.com: How Your Government Can Monitor Your Communications
Date: 24 Dec 1996 20:52:20 GMT
Organization: Virtual Publishing Co.
Lines: 14
Message-ID: <59pfq4$[e-mail]>
NNTP-Posting-Host: vbook.accessone.com
X-Newsreader: WinVN 0.99.5
Xref: news1.epix.net rec.radio.amateur.misc:121596 rec.radio.amateur.digital.misc:20855 rec.radio.amateur.policy:44615 rec.radio.amateur.homebrew:22352 rec.radio.scanner:73923 rec.radio.shortwave:91048 aus.radio.amateur.misc:1687 aus.radio.amateur.digital:308

With permission, we've reprinted a fascinating story from CovertAction
Quarterly, on worldwide government agencies ability to monitor your email, FAX
,
computer and voice communications. While some may conclude this falls into the

"conspiracy theory" class of news, we have primary sources that confirmed
portions of the story as true. Makes for interesting reading.

Check it out at http://www.hamradio-online.com

------------------------
Ed (KF7VY) and Kim (N7VPL) Mitchell
email to [e-mail]
Visit Ham Radio Online, it's free! at
http://www.hamradio-online.com



From [e-mail] Thu Jan 02 17:50:06 1997
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!newsfeed.internetmci.com!in2.uu.net!198.68.191.16!news.accessone.com!news
From: [e-mail] (Ed Mitchell)
Newsgroups: rec.radio.amateur.misc,rec.radio.amateur.digital.misc,rec.radio.amateur.policy,rec.radio.amateur.homebrew
Subject: www.hamradio-online.com: FCC RF Safety Rules *** CORRECTION ***
Date: 24 Dec 1996 20:56:01 GMT
Organization: Virtual Publishing Co.
Lines: 13
Message-ID: <59pg11$[e-mail]>
NNTP-Posting-Host: vbook.accessone.com
X-Newsreader: WinVN 0.99.5
Xref: news1.epix.net rec.radio.amateur.misc:121595 rec.radio.amateur.digital.misc:20854 rec.radio.amateur.policy:44613 rec.radio.amateur.homebrew:22351

Previous posting should have noted that the FCC RF Safety Rules
compliance is postponed until September 1997 for non-Amateur services and unti
l
January 1998 for the Amateur Radio Service. Sorry if this causes you any
confusion.

See http://www.hamradio-online.com

------------------------
Ed (KF7VY) and Kim (N7VPL) Mitchell
email to [e-mail]
Visit Ham Radio Online, it's free! at
http://www.hamradio-online.com



From [e-mail] Thu Jan 02 17:50:07 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!uwm.edu!msunews!news
From: Jim Alberts <[e-mail]>
Newsgroups: rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.amateur.misc,rec.radio.scanner,rec.radio.swap,alt.radio.scanner
Subject: Re: PRO 26 MOD ? is there one?
Date: Tue, 24 Dec 1996 15:56:28 -0500
Organization: Michigan State University
Lines: 35
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
NNTP-Posting-Host: pm097-21.dialip.mich.net
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-MSUnetID: alberts
X-Mailer: Mozilla 3.01Gold (Win95; I)
To: Greg Milligan <[e-mail]>
Xref: news1.epix.net rec.radio.amateur.equipment:44989 rec.radio.amateur.homebrew:22353 rec.radio.amateur.misc:121597 rec.radio.scanner:73924 rec.radio.swap:100978 alt.radio.scanner:43587

Greg Milligan wrote:
>
> In article <[e-mail]>, [e-mail] wrote:
>
> > Is there a mod for cellular for the Pro 26?  I have one source that says
> > there is.  I would like to get a few more references before I attempt
> > it.  Any help would be greatly appreciated.  Thank you.
> >
> >
> > Nick Yatko
> > [e-mail]
>
> Nick you can find various bits of info at the tandy support web site
>
> http://support.tandy.com/support_electronics/15613.html
>
> and a cell modification provided by Ross Voorhees (KB0PKT) at
>
> http://www.zianet.com/kc5kto/mods/pro26cell.html
>
> Hope this helps.
> --
> Greg Milligan
>
> The University of Sheffield, Department of Clinical Neurology, Floor 'N',
> Royal Hallamshire Hospital, Glossop Road, Sheffield S10 2JF, UK.
> Tel: [phone]    Fax: [phone]   EMail:[e-mail]
> World Wide Web: http://www.shef.ac.uk/uni/academic/A-C/cn/index.html
> Amateur Radio (AX25 Packet Network): G1CPU@GB7WRG.#19.GBR.EU

Cellular Group advertises that they can modify the Pro 26 along with
many others to receive cell freq. I don't happen to have their address
handy at the moment. They advertise in Monitoring Times all the time.
Maybe someone else has their address or it is on the Monitoring Times
web page.


From [e-mail] Thu Jan 02 17:50:09 1997
Newsgroups: alt.radio.pirate,rec.radio.amateur.homebrew
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!news.bbnplanet.com!su-news-hub1.bbnplanet.com!su-news-feed4.bbnplanet.com!autodesk.com!toad.com!amdahl.com!ogma.ccc.amdahl.com!netnews
From: Sid Boyce <[e-mail]>
Subject: Re: Wanted: Plans for a radio jammer or spark gap transmitter
X-Nntp-Posting-Host: 199.228.216.4
Content-Type: text/plain; charset=us-ascii
To: [e-mail]
Message-ID: <[e-mail]>
Sender: [e-mail] (Usenet Administration)
Content-Transfer-Encoding: 7bit
Organization: amdahl.com
References: <[e-mail]>
Mime-Version: 1.0
Date: Tue, 24 Dec 1996 23:10:23 GMT
X-Mailer: Mozilla 3.01 (X11; I; Linux 2.0.27 i586)
Lines: 18
Xref: news1.epix.net alt.radio.pirate:22145 rec.radio.amateur.homebrew:22386

[e-mail] wrote:
>
> I'm looking for some good plans for a spark gap transmitter or anything else
 that could be used for a medium range (20 to 200 feet) radio jammer. I've bee
n looking for some all today on the Internet with no luck, and if anyone has a
ny plans at all, e-mail me:  [e-mail] and I'd be greatfull. If you d
o reply to this, make sure to e-mail me as well because I don't get to read Us
enet newsgroups as often as I'd like to and I'm likely to miss the posting (es
pecially with Christmas coming up
> TW, this is for IMFORMATIONAL PURPOSES ONLY. Today's not the first day I've
been looking for some plans, and I've all but given up.
>
> -----
> [e-mail]
> -------------------==== Posted via Deja News ====-----------------------
>       http://www.dejanews.com/     Search, Read, Post to Usenet
        In the RAF I used  a square wave oscillator connected to the central
heating system, worked a treat.
Regards
--
... Sid Boyce...Amdahl(UK)[e-mail]
                   -----------------------------------
Any opinions expressed above are mine and do not necessarily represent
 the opinions or policies of Amdahl Corporation.



From [e-mail] Thu Jan 02 17:50:10 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.homebrew
Subject: Re: Good source for amplifier tips
Date: 24 Dec 1996 23:35:14 GMT
Organization: The Santa Fe Institute
Lines: 12
Message-ID: <01bbf1f0$dcf1cda0$[e-mail]>
References: <[e-mail]> <[e-mail]>
NNTP-Posting-Host: 198.59.109.166
X-Newsreader: Microsoft Internet News 4.70.1155


> Perhaps this will give us insight into your claims and measurements.

  C'mon, Tom...My grandpappy always said, "Once you take the high ground,
you never have to look back."

  Remember it's Christmas...Peace to All and Good Will amongst Men!

  david





From [e-mail] Thu Jan 02 17:50:12 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!feed1.news.erols.com!news-xfer.netaxs.com!tezcat!news.sprintlink.net!news-chi-8.sprintlink.net!ralph.vnet.net!news
From: [e-mail] (Si Ballenger)
Newsgroups: alt.radio.pirate,rec.radio.amateur.homebrew
Subject: Re: Wanted: Plans for a radio jammer or spark gap transmitter
Date: Tue, 24 Dec 1996 23:46:44 GMT
Organization: maybe later...
Lines: 18
Message-ID: <59pq14$[e-mail]>
References: <[e-mail]> <59p6d8$[e-mail]> <59ol8h$[e-mail]>
NNTP-Posting-Host: shb.vnet.net
X-No-Archive: Yes
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Xref: news1.epix.net alt.radio.pirate:22137 rec.radio.amateur.homebrew:22365

[e-mail] (John Lundgren) wrote:


>Hay, I've got a problem.  I looked at my engine the other day when I was
>changing oil.  Mebbe you could tell me what's wrong.  I have a 4 cylinder
>Ford ranger, and I counted four spark plugs on one side of the engine.
>Then I looked on the other side of the engine and there were four more.
>It doesn't have a distributor either.

>Real strange, huh?

I've got a 85' Nissian truck with 4 cyl. and 8 plugs. Appearantly the only
reason for the extra plugs is to make it idle quiter (I don't think the extra
set is used when the engine is under load. Seems like a waste). Your lack of a
distrabutor on the engine probably means you have a system where the plugs
fire more than once a cycle. Heard a story once of a guy that found a spare
engine in the rear trunk of his VW.  ;-)



From [e-mail] Thu Jan 02 17:50:13 1997
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!feed1.news.erols.com!howland.erols.net!newsfeed.internetmci.com!paperboy.ids.net!anomaly.ideamation.com!anomaly.ideamation.com!not-for-mail
From: [e-mail] (Michael P. Deignan)
Newsgroups: rec.radio.amateur.misc,rec.radio.amateur.digital.misc,rec.radio.amateur.policy,rec.radio.amateur.homebrew,rec.radio.scanner,rec.radio.shortwave,aus.radio.amateur.misc,aus.radio.amateur.digital
Subject: Re: www.hamradio-online.com: How Your Government Can Monitor Your Communications
Date: 24 Dec 1996 18:49:38 -0500
Organization: The Ace Tomato Company
Lines: 15
Message-ID: <59pq6i$[e-mail]>
References: <59pfq4$[e-mail]>
NNTP-Posting-Host: anomaly.ideamation.com
Xref: news1.epix.net rec.radio.amateur.misc:121615 rec.radio.amateur.digital.misc:20861 rec.radio.amateur.policy:44628 rec.radio.amateur.homebrew:22366 rec.radio.scanner:73934 rec.radio.shortwave:91063 aus.radio.amateur.misc:1688 aus.radio.amateur.digital:309

In article <59pfq4$[e-mail]>,
        Ed Mitchell <[e-mail]> wrote:

>With permission, we've reprinted a fascinating story from CovertAction
>Quarterly, on worldwide government agencies ability to monitor your email, FA
X,
>computer and voice communications.

Old news. Government agencies have had the capability for years.

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] Thu Jan 02 17:50:14 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.homebrew
Subject: Mailing List Reflector
Date: 24 Dec 1996 17:18:02 -0700
Organization: Primenet Services for the Internet
Lines: 20
Message-ID: <[e-mail]>
Reply-To: [e-mail]
X-Posted-By: @198.68.46.89 (ke7gh)
X-Mailer: Mozilla 3.0Gold (Win95; I)
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
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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 17:50:15 1997
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!worldnet.att.net!news.alt.net!newspost1.alt.net!usenet
From: "Peter Gottlieb" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Clamping Diode
Date: 25 Dec 1996 00:26:35 GMT
Organization: Altopia Corp. - Affordable Usenet Access - http://www.alt.net
Lines: 24
Message-ID: <01bbf1fa$32387760$310f2399@peter-s>
References: <59l13l$[e-mail]> <[e-mail]>
X-Newsreader: Microsoft Internet News 4.70.1155

Wes Stewart <[e-mail]> wrote in article
<[e-mail]>...
> The term might describe many things.  For instance, a common function is
to
> clamp (limit) the reverse voltage spike generated in a switched inductive
load
> (such as a relay) when the current is turned off.  A transistor switch in
this
> case might be destroyed by the reverse polarity voltage applied to the
> collector.  The diode across the coil limits this voltage to
approximately
> .65V and saves the transistor.


It's a positive spike - check it with a 'scope.  And the diode will slow
down the
release of the relay because it keeps current flowing longer in the coil.
If you
use a MOSFET usually you can forget the diode because many 'Fets are rated
for breakdown operation.

But your main point is entirely correct.




From [e-mail] Thu Jan 02 17:50:16 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!gatech!csulb.edu!hammer.uoregon.edu!news-peer.gsl.net!news.gsl.net!news.sprintlink.net!news-peer.sprintlink.net!worldnet.att.net!newsadm
From: "John H." <[e-mail]>
Newsgroups: alt.radio.pirate,rec.radio.amateur.homebrew
Subject: Re: Wanted: Plans for a radio jammer or spark gap transmitter
Date: Tue, 24 Dec 1996 19:36:14 -0500
Organization: AT&T WorldNet Services
Lines: 18
Message-ID: <[e-mail]>
References: <[e-mail]>
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Xref: news1.epix.net alt.radio.pirate:22139 rec.radio.amateur.homebrew:22369

[e-mail] wrote:
>
> I'm looking for some good plans for a spark gap transmitter or anything else
 that could be used for a medium range (20 to 200 feet) radio jammer. I've bee
n loo
>
> -----
> [e-mail]
> -------------------==== Posted via Deja News ====-----------------------
>       http://www.dejanews.com/     Search, Read, Post to Usenet

How about a Tesla coil from Edmund Scientific. For experimental use
only, right?! hehehehe!!!!   ;-)

--
John H.          ((((((((((/\)))))))))
                          /  \
                         /87.9\
                        / FM   \
http://www.GeoCities.com/CapeCanaveral/6702


From [e-mail] Thu Jan 02 17:50:17 1997
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.magicnet.net!news.sprintlink.net!news-atl-21.sprintlink.net!news.sprintlink.net!news-pull.sprintlink.net!news.sprintlink.net!news-dc-10.sprintlink.net!news.alt.net!newspost1.alt.net!usenet
From: "Peter Gottlieb" <[e-mail]>
Newsgroups: alt.radio.pirate,rec.radio.amateur.homebrew
Subject: Re: Wanted: Plans for a radio jammer or spark gap transmitter
Date: 25 Dec 1996 00:36:48 GMT
Organization: Altopia Corp. - Affordable Usenet Access - http://www.alt.net
Lines: 15
Message-ID: <01bbf1fb$a043bde0$310f2399@peter-s>
References: <[e-mail]> <[e-mail]>
X-Newsreader: Microsoft Internet News 4.70.1155
Xref: news1.epix.net alt.radio.pirate:22140 rec.radio.amateur.homebrew:22370

> His suspicions were confirmed by the loud laughter coming
> from the neigboring room. Details of his threats on the lives of the
> conspirators are omitted. Likewise, the names of the perpetrators have
> been omitted.

We simply used a signal gen and little RF amp.  Makes a nice silence on
an FM radio.  For AM and records (this was before CD's) we used Motorola
4 Watt UHF portables placed against the common wall right behind the
stereo.  Kinda makes the speaker cones want to pop out, ya know?

The silencing acquired a term with us...  we called it "Waveteking," as in:
"We had to Wavetek the neighbors three times today!"

...Peter



From [e-mail] Thu Jan 02 17:50:18 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.sprintlink.net!news-peer.sprintlink.net!news.sprintlink.net!news-pull.sprintlink.net!news.sprintlink.net!news-dc-10.sprintlink.net!news.alt.net!newspost1.alt.net!usenet
From: "Peter Gottlieb" <[e-mail]>
Newsgroups: alt.radio.pirate,rec.radio.amateur.homebrew
Subject: Re: Wanted: Plans for a radio jammer or spark gap transmitter
Date: 25 Dec 1996 00:38:25 GMT
Organization: Altopia Corp. - Affordable Usenet Access - http://www.alt.net
Lines: 11
Message-ID: <01bbf1fb$da7979a0$310f2399@peter-s>
References: <[e-mail]> <01bbf19b$62523440$ce04fa26@larry> <59ol1i$[e-mail]>
X-Newsreader: Microsoft Internet News 4.70.1155
Xref: news1.epix.net alt.radio.pirate:22138 rec.radio.amateur.homebrew:22368

John Lundgren <[e-mail]> wrote in article
<59ol1i$[e-mail]>...
> Well, you chopped off the part where he said it was 'for informational
> purposes only'.  Yeah, right.


Well its better to let the guy let out his aggressions by a teeny jammer
than coming over with
a machete.




From [e-mail] Thu Jan 02 17:50:19 1997
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-pull.sprintlink.net!news.sprintlink.net!news-dc-10.sprintlink.net!news.alt.net!newspost1.alt.net!usenet
From: "Peter Gottlieb" <[e-mail]>
Newsgroups: alt.radio.pirate,rec.radio.amateur.homebrew
Subject: Re: Wanted: Plans for a radio jammer or spark gap transmitter
Date: 25 Dec 1996 00:39:44 GMT
Organization: Altopia Corp. - Affordable Usenet Access - http://www.alt.net
Lines: 13
Message-ID: <01bbf1fc$092828a0$310f2399@peter-s>
References: <[e-mail]> <59p6d8$[e-mail]> <59ol8h$[e-mail]>
X-Newsreader: Microsoft Internet News 4.70.1155
Xref: news1.epix.net alt.radio.pirate:22146 rec.radio.amateur.homebrew:22387

John Lundgren <[e-mail]> wrote in article
<59ol8h$[e-mail]>...
> Hay, I've got a problem.  I looked at my engine the other day when I was
> changing oil.  Mebbe you could tell me what's wrong.  I have a 4 cylinder

> Ford ranger, and I counted four spark plugs on one side of the engine.
> Then I looked on the other side of the engine and there were four more.
> It doesn't have a distributor either.
>
> Real strange, huh?

Not strange at all.  Autos are sold through DEALERS, not distributors.



From [e-mail] Thu Jan 02 17:50:20 1997
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.iarc.com!news.maxwell.syr.edu!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!worldnet.att.net!newsadm
From: [e-mail] (J. Fred Riley)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: TL-922 Arcing - the Saga Ends???
Date: Wed, 25 Dec 1996 01:13:07 GMT
Organization: AT&T WorldNet Services
Lines: 17
Message-ID: <[e-mail]>
References: <01bbf1bc$98d59360$[e-mail]>
NNTP-Posting-Host: 207.147.105.41
X-Newsreader: Forte Free Agent 1.1/32.230

On 24 Dec 1996 17:21:08 GMT, "David B. Holtkamp (K5KH)"
<[e-mail]> wrote:
>  You might remember me -- I'm the fellow with the TL-922 that was
>experiencing intermittent arcing. Rich
>tried very hard to help me out.
snip
> lighting protectors were arcing to ground when I reached
>some critical power level on the PA

OK.  But the question was: "How are the low Q parasitic suppressors
doing in preventing the VHF parasitic that was causing the capacitor
to arc?"  Breath was never more baited.


Fred

[e-mail]  [e-mail] [e-mail]


From [e-mail] Thu Jan 02 17:50:21 1997
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!zombie.ncsc.mil!newsgate.duke.edu!agate!howland.erols.net!worldnet.att.net!newsadm
From: [e-mail] (J. Fred Riley)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: Wed, 25 Dec 1996 01:20:11 GMT
Organization: AT&T WorldNet Services
Lines: 12
Message-ID: <[e-mail]>
References: <01bbf1bb$53725200$[e-mail]> <[e-mail]> <01bbf1f0$5bc36e00$[e-mail]>
NNTP-Posting-Host: 207.147.105.41
X-Newsreader: Forte Free Agent 1.1/32.230

On 24 Dec 1996 23:31:39 GMT, "David B. Holtkamp (K5KH)"
<[e-mail]> wrote:
>I do see quite a noticable reduction in antenna charging "spikes" that go
>"pop" in my receiver when the surge suppressor is in place.

The answer to this I gotta hear; 'specially the theory part.



Fred

[e-mail]  [e-mail] [e-mail]


From [e-mail] Thu Jan 02 17:50:22 1997
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!usenet.eel.ufl.edu!arclight.uoregon.edu!enews.sgi.com!news.sgi.com!news-out.microserve.net!news-in.microserve.net!not-for-mail
From: [e-mail] (Steven Kerns)
Newsgroups: rec.radio.amateur.digital.misc,alt.ham-radio.ssb,rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.amateur.space
Subject: Re: Kits for phase-3D?
Date: 25 Dec 1996 01:35:56 GMT
Organization: Penn Biomedical Support, Inc.
Lines: 20
Distribution: world
Message-ID: <59q0ds$72c$[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ppp10.talon.net
Mime-Version: 1.0
Content-Type: Text/Plain; charset=US-ASCII
X-Newsreader: WinVN 0.99.7
Xref: news1.epix.net rec.radio.amateur.digital.misc:20864 rec.radio.amateur.equipment:45006 rec.radio.amateur.homebrew:22374 rec.radio.amateur.space:9203

Try Down East Microwave; http\\downeastmicrowave.com

They have a lot of neat stuff for VHF/UHF/microwave.

73 Steve N3FTI

In article <[e-mail]>, [e-mail] says...
>
>Does anyone know of any 6-meter, 2-meter and 70-cm SSB kits that would
>be good to use for the Phase-3D sat when it gets in orbit.  I'm a
>college student with limited funds.  I would like to work the sat when
>it get up but can not buy the high price equipment that is needed but
>would like to build a small sat station if possible.
>
>Thanks
>
>
>Timothy
>KD4IKY



From [e-mail] Thu Jan 02 17:50:22 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!dciteleport.com!newsfeed.internetmci.com!malgudi.oar.net!news.muohio.edu!news.muohio.edu!nntp
Newsgroups: rec.radio.amateur.homebrew
Subject: WTD: Harrison 6209A manual
Message-ID: <[e-mail]>
From: "James C. Garland" <[e-mail]>
Date: Tue, 24 Dec 1996 21:36:52 -0400
Organization: Miami University
Nntp-Posting-Host: 134.53.65.12
X-Mailer: Mozilla 2.02 (Macintosh; I; PPC)
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Lines: 6

I need a manual or circuit diagram for a Harrison 6209A
regulated power supply (0-320C, 0-100mA). I picked one up
cheap recently and need the schematic in order to repair it.
Thanks.

Jim W8ZR


From [e-mail] Thu Jan 02 17:50:23 1997
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!newspump.sol.net!posts.execpc.com!usenet
From: John Lentz <[e-mail]>
Newsgroups: alt.radio.pirate,rec.radio.amateur.homebrew
Subject: Re: Wanted: Plans for a radio jammer or spark gap transmitter
Date: Tue, 24 Dec 1996 17:53:11 -0800
Organization: sol.net Network Services - Milwaukee, WI
Lines: 31
Message-ID: <[e-mail]>
References: <[e-mail]> <59p6d8$[e-mail]> <59ol8h$[e-mail]>
NNTP-Posting-Host: newsreaders.sol.net
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
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Cache-Post-Path: smyrno.sol.net!unknown@206.55.72.37
Xref: news1.epix.net alt.radio.pirate:22136 rec.radio.amateur.homebrew:22364

John Lundgren wrote:

>
> Hay, I've got a problem.  I looked at my engine the other day when I was
> changing oil.  Mebbe you could tell me what's wrong.  I have a 4 cylinder
> Ford ranger, and I counted four spark plugs on one side of the engine.
> Then I looked on the other side of the engine and there were four more.
> It doesn't have a distributor either.
>
> Real strange, huh?
>
> --
> #===================================================================#
> |    John Lundgren - Elec Tech - Info Tech Svcs. |    jlundgre@     |
> |    Rancho Santiago Community College District  |   deltanet.com   |
> |     17th St at Bristol \ Santa Ana, CA 92706   | http://www.rancho|
> | My opinions are my own, and not my employer's. |    .cc.ca.us     |
> |   Most FAQs are available through Thomas Fine's WWW FAQ archive:  |
> |http://www.cis.ohio-state.edu:80/hypertext/faq/usenet/FAQ-List.html|
> |     "Babe Ruth struck out 1,330 times...  keep on swinging."      |
> |     says the lid on the jar of Laredo & Lefty's Picante Salsa     |
> !  You MAY NOT use my email address for unsolicited Email or lists! !
> #======P=G=P==k=e=y==a=v=a=i=l=a=b=l=e==u=p=o=n==r=e=q=u=e=s=t======#


   Does your Ford Ranger operate?

    If so, then whats the problem? As long as it is running WITHOUT a distribu
tor, then
maybe it doesn't take in any gas. With that you would be very lucky!

John L.


From [e-mail] Thu Jan 02 17:50:24 1997
Path: news1.epix.net!news3.epix.net!uunet!in2.uu.net!204.191.213.61!ott.istar!istar.net!news.nstn.ca!tor.istar!east.istar!virginia.bmts.com!primeline.net!tait
From: Gary Tait <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew,sci.electronics.design
Subject: Re: Wanted: Tips for constructing water cooled load
Date: Tue, 24 Dec 1996 20:56:11 -0500
Organization: Bruce Municipal Telephone System
Lines: 15
Message-ID: <[e-mail]>
References: <[e-mail]> <59e1vd$[e-mail]> <[e-mail]>
NNTP-Posting-Host: ns.primeline.net
Mime-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
To: Mark Robinson <[e-mail]>
In-Reply-To: <[e-mail]>
Xref: news1.epix.net rec.radio.amateur.homebrew:22337 sci.electronics.design:28683

On Sat, 21 Dec 1996, Mark Robinson wrote:

#> : I am wanting to build a non-inductive 8 kW load for 300 kHz, CW.  The
#
#Given the low frequency, what about a few toaster elements, or 1kW
#linear quartz halogen flood lamp bulbs (adjust impedance by adjusting
#drive :)
#

No, toaster elements ,and lightbulbs are inductive as well, and no
good as an RF load.

Gary Tait , VE3VBF




From [e-mail] Thu Jan 02 17:50:25 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!howland.erols.net!cliffs.rs.itd.umich.edu!portc01.blue.aol.com!newsstand.cit.cornell.edu!cu-dialup-0905.cit.cornell.edu!user
From: [e-mail] (Joel Govostes)
Newsgroups: rec.radio.amateur.homebrew
Subject: Heath HW101- KEYING PROBLEMS
Date: 25 Dec 1996 02:00:58 GMT
Organization: Cornell University
Lines: 36
Sender: [e-mail] (Verified)
Message-ID: <[e-mail]>
NNTP-Posting-Host: cu-dialup-0905.cit.cornell.edu

Hi All.

I have an HW101 which is giving me some difficulty.  I just recently had
it overhauled, but find it is acting fishy when it comes to CW keying.

The rig does fine in "test" mode, and loads up with no problem.  BUT when
I switch it to CW and try to send, one of the main relays won't hold!

When I close the key, the transmitter relays kick in, receiver mutes, the
sidetone comes on, and there is output.  All fine.  BUT if I hold the key
down, for more than a second or two, the relay kicks back out, the the
transmit signal is cut off.  I still hear the sidetone, though.

SO if I wish to hold the key down and transmit for a few seconds, to check
SWR or whatever, the transmitter will not remain ON past a second or two.
I just hear the relay kick back off again. This is in the Push-To-Talk or
VOX mode (doesn't seem to matter which).   I have no similar problems when
transmitting SSB.

If I HOLD the key down, for an extended time, the relay will keep kicking
in and out and the transmit signal will go on and off at about a 1-second
interval, ad infinitum.

Could someone *please* give me some suggestions on this?  Why might the
relay not be "holding?"   I also notice that sometimes the first couple of
taps on the key will not even put the rig in transmit mode immediately, so
the tx won't send til I'm in the middle of the second or third letter!

The initial repairs were pretty expensive but I want to keep this rig
going. (I inherited it from my wife's grandfather, W3GCN, who is now quite
ill.)  All other functions seem A-OK.

At this point, I can't even send my call (N1AEP), because by the time I
get to the last "dah" in the "1", the transmitter relay kicks out.  It is
very frustrating.    Any help would be greatly appreciated.   73,  Joel
N1AEP


From [e-mail] Thu Jan 02 17:50:27 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.sprintlink.net!news-peer.sprintlink.net!newsfeed.gte.net!usenet
From: [e-mail] (L.D.Brewer 2-Way Radio)
Newsgroups: alt.radio.pirate,rec.radio.amateur.homebrew
Subject: Re: Too Many plugs , Was: Wanted: Plans for ....
Date: Wed, 25 Dec 1996 03:51:58 GMT
Organization: L.D. Brewers 2-Way Radio
Lines: 33
Message-ID: <[e-mail]>
References: <[e-mail]> <59p6d8$[e-mail]> <59ol8h$[e-mail]> <59pp36$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: tpm228157.gte.net
X-Newsreader: Forte Agent .99d/32.182
Xref: news1.epix.net alt.radio.pirate:22142 rec.radio.amateur.homebrew:22380

On Tue, 24 Dec 1996 23:21:03 -0800, woody white <"eMail "@
my.www.page.Mailto> wrote:

>Don't have one, but I understand that some engines now have 2
>plugs/cylinder for better ignition distribution and a coil for each
>cylinder (usual case for motorcycle engines).
>              _Woody_
>
Welllll.....

In the area of motorcycles, I can tell you we have been
"Dual Plugging" Harleys for years.

The adding of the exra plug makes the fuel burn more efficiently
and can actually produce more horsepower.

Last year I purchased a Dodge Ram truck with a V-10. NO distributor,
but an interesting looking set of coils and wires going to the plugs !

Looks like technology is going EVERYWHERE, but I don't see the
alignment between automotive technology, and micropower broadcasting.

Perhaps I am just "closed minded" :)

Anyway, Happy Holidays from all of us to all of you !

Doug

L.D.Brewer 2-Way Radio
http://www.ldbrewer.com
[e-mail]
1-800-886-8023



From [e-mail] Thu Jan 02 17:50:27 1997
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From: [e-mail] (The Nihilist)
Newsgroups: rec.radio.amateur.homebrew
Subject: CB/Walkie Talkie Mods?
Date: Wed, 25 Dec 1996 04:12:05 GMT
Organization: Nihilism-R-Us
Lines: 18
Message-ID: <[e-mail]>
Reply-To: [e-mail]
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X-Newsreader: Forte Free Agent 1.1/16.230


           I'm curious as to whether or not a CB and/or toy walkie
talkies can be modified to use different frequencies.
           For instance;  I work for a place where I can get ahold of
crystals with, say, 7.91430  MHz written on them.  If I was to get 2
of these and solder them into the slot originally occupied by the
walkie talkies' 49 MHz crystal, would that work?

           As far as CBs go, if I bought an old CB that was crystal
controlled, then went to RadioShack and bought those ancient scanner
crystals and plugged them in, would this work for both broadcasting
and receiving?


Thanks in advance for any help.


The Nihilist


From [e-mail] Thu Jan 02 17:50:28 1997
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From: [e-mail] (derek hutter)
Newsgroups: rec.radio.amateur.digital.misc,alt.ham-radio.ssb,rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.amateur.space
Subject: Re: Kits for phase-3D?
Date: 25 Dec 1996 04:26:52 GMT
Organization: Pacifier Internet Server [phone]
Lines: 21
Message-ID: <59qaec$[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ip87.van3.pacifier.com
Mime-Version: 1.0
Xref: news1.epix.net rec.radio.amateur.digital.misc:20866 rec.radio.amateur.equipment:45010 rec.radio.amateur.homebrew:22376 rec.radio.amateur.space:9206

In article <[e-mail]>, [e-mail] says...
>
>Does anyone know of any 6-meter, 2-meter and 70-cm SSB kits that would
>be good to use for the Phase-3D sat when it gets in orbit.  I'm a
>college student with limited funds.  I would like to work the sat when
>it get up but can not buy the high price equipment that is needed but
>would like to build a small sat station if possible.
>
>Thanks
>
>
>Timothy
>KD4IKY

Tim,

 Down East Microwave, Steve has a WEB site.

Derek K7XD




From [e-mail] Thu Jan 02 17:50:29 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: 25 Dec 1996 05:14:28 GMT
Organization: AOL http://www.aol.com
Lines: 7
Message-ID: <[e-mail]>
References: <[e-mail]>
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X-Admin: [e-mail]
X-Newsreader: AOL Offline Reader

>  C'mon, Tom...My grandpappy always said, "Once you take the high ground,
>you never have to look back."
>
>  Remember it's Christmas...Peace to All and Good Will amongst Men!

My grandpap used to say "You reap what you sow". That fits this case
better.


From [e-mail] Thu Jan 02 17:50:30 1997
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From: [e-mail] (lbliao)
Newsgroups: sci.electronics.design,sci.electronics.misc,rec.radio.swap,rec.radio.amateur.homebrew
Subject: Ideas for Low Frequency Tunable Filters
Date: 25 Dec 1996 06:17:07 GMT
Organization: California Institute of Technology, Pasadena
Lines: 10
Message-ID: <59qgt3$[e-mail]>
NNTP-Posting-Host: alumnae.caltech.edu
Xref: news1.epix.net sci.electronics.design:28695 sci.electronics.misc:19090 rec.radio.swap:100945 rec.radio.amateur.homebrew:22340

I am looking for a low frequency tunable filter, in the range of 0.05Hz to
say 10Hz. The filter could have a response of say double pole, so that it
is a peaking filter. The Peaking frequency should be variable electronically,
which means that a variable resistor is ruled out.


Thanks a lot!
lbliao




From [e-mail] Thu Jan 02 17:50:31 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: MC13135 Application Notes?
Date: Tue, 24 Dec 1996 22:20:58 -0800
Organization: AT&T WorldNet Services
Lines: 8
Message-ID: <[e-mail]>
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Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.01 (Win95; I)

I would like to know if there are any application notes on the
Motorola MC13135 other than the info on the Motorola web page.

Specifically, I would like info/formulas on converting the values
on their application circuit (Fig. 15 on MC13135 Data Sheet) to
receive at 72MHz instead of 49MHz.

Thanks


From [e-mail] Thu Jan 02 17:50:33 1997
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From: "Richard M. Corrigan" <[e-mail]>
Newsgroups: rec.radio.amateur.misc,rec.radio.amateur.digital.misc,rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.shortwave
Subject: CW Interface
Date: Wed, 25 Dec 1996 15:57:34 +0900
Organization: BenchMark Communications Systems
Lines: 13
Message-ID: <[e-mail]>
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I recently heard of a cable that attaches from you Reciever to
the serial port of a computer which allows CW to be translated
by your Computer for display on your monitor.  Is this true?
I thought that a TNC was needed.  If it is true does anyone
have the pin outs to build such a cable or maybe a source that
I could contact to obtain one.

                Thanks and Merry Christmas

                       Rich
,




From [e-mail] Thu Jan 02 17:50:34 1997
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From: [e-mail] (John Kolb)
Newsgroups: alt.radio.pirate,rec.radio.amateur.homebrew
Subject: Re: Wanted: Plans for a radio jammer or spark gap transmitter
Followup-To: alt.radio.pirate,rec.radio.amateur.homebrew
Date: 25 Dec 1996 07:06:23 GMT
Organization: CTS Network Services (CTSNET), San Diego, CA
Lines: 10
Message-ID: <59qjpf$[e-mail]>
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NNTP-Posting-Host: sd-i2.cts.com
Xref: news1.epix.net alt.radio.pirate:22143 rec.radio.amateur.homebrew:22385

Peter Gottlieb ([e-mail]) wrote:

: The silencing acquired a term with us...  we called it "Waveteking," as in:
: "We had to Wavetek the neighbors three times today!"

I doubt that Wavetek Corp, San Diego CA would like thaat use of their
name  :)

John  ex Wavetek tech



From [e-mail] Thu Jan 02 17:50:35 1997
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From: woody white <"eMail "@ my.www.page.Mailto>
Newsgroups: alt.radio.pirate,rec.radio.amateur.homebrew
Subject: Too Many plugs , Was: Wanted: Plans for ....
Date: Tue, 24 Dec 1996 23:21:03 -0800
Organization: http://www.geocities.com/capecanaveral/3722
Lines: 34
Message-ID: <59pp36$[e-mail]>
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Don't have one, but I understand that some engines now have 2
plugs/cylinder for better ignition distribution and a coil for each
cylinder (usual case for motorcycle engines).
              _Woody_


> Hay, I've got a problem.  I looked at my engine the other day when I was
> changing oil.  Mebbe you could tell me what's wrong.  I have a 4 cylinder
> Ford ranger, and I counted four spark plugs on one side of the engine.
> Then I looked on the other side of the engine and there were four more.
> It doesn't have a distributor either.
>
> Real strange, huh?
>
> --
> #===================================================================#
> |    John Lundgren - Elec Tech - Info Tech Svcs. |    jlundgre@     |
> |    Rancho Santiago Community College District  |   deltanet.com   |
> |     17th St at Bristol \ Santa Ana, CA 92706   | http://www.rancho|
> | My opinions are my own, and not my employer's. |    .cc.ca.us     |
> |   Most FAQs are available through Thomas Fine's WWW FAQ archive:  |
> |http://www.cis.ohio-state.edu:80/hypertext/faq/usenet/FAQ-List.html|
> |     "Babe Ruth struck out 1,330 times...  keep on swinging."      |
> |     says the lid on the jar of Laredo & Lefty's Picante Salsa     |
> !  You MAY NOT use my email address for unsolicited Email or lists! !
> #======P=G=P==k=e=y==a=v=a=i=l=a=b=l=e==u=p=o=n==r=e=q=u=e=s=t======#

--
de  Woody, WB4QXE, woody_white@worldnet_att_net (_=. No AutoMail)
Work: Electron Microscopist/Microanalysist
Balance: Ham radio "homebrewer", shade tree mechanic,
'90 Nissan 240SX, wish still had my Mcycle too!
http://www.geocities.com/capecanaveral/3722
.


From [e-mail] Thu Jan 02 17:50:36 1997
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From: [e-mail] (Bob Ecclestone)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Coax Connectors Impedance (yes, there *are* 75 ohm BNCs)
Date: Wed, 25 Dec 1996 07:58:47 GMT
Organization: Customer of Access One Pty Ltd, Melbourne, Australia
Lines: 57
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]> <59eic1$[e-mail]>
NNTP-Posting-Host: cheese.pcug.org.au
X-Newsreader: Forte Free Agent 1.0.82

[e-mail] (Dave Martindale) wrote:

>[e-mail] writes:
>>In regard to Jeanne's query, I believe there are 75-ohm BNC's, as well as
>>50-ohm types.  Could someone more knowledgeable tell us how to
>>distinguish them?
>>                                     Dave KE9ED

>Many people have described how to tell BNC connectors designed for RG-59
>cable by the larger clamp diameter.  However, these are still 50-ohm
>connectors being used on 75 ohm cable.

>There *are* BNC connectors with a characteristic impedance of 75 ohms,
>and you will find them on some high-quality video equipment.  You can
>identify them because the dielectric inside the connector itself is
>air, not Teflon.  The physical dimensions of the mating parts are the same,
>so the 50- and 75-ohm versions will connect to each other.  But the female
>75-ohm connector has a bare center conductor socket without the usual
>Teflon cylinder around it, while the male connector has no Teflon cylinder
>just inside the ground contact barrel.

>I guess keeping the conductor diameters the same but changing the dielectric
>to air shifts the impedance to 75 ohms.  Of course, the voltage rating is
>reduced - but these connectors are used with 1 V signals.

>       Dave

This is still a very contentious subject!

However the bottom line is that, by definition, "BNC" is 50 ohm.
"BNC" = Bayonet "N" Connector, which is 50 ohm.

The secret is the ratio of inner conductor outside diameter to outer
conductor inside diameter (follow??!) The ratio always (should) come
out to 50 ohms. The dielectric used will alter the loss factor (Q) and
propagation velocity but will not (within reasonable limits) affect
the characteristic impedance.

The centre conductor of a 75 ohm BNC would have to be significantly
smaller diameter than the 50 ohm variety, to the point where it would
be dificult to maintain the 75 ohm dimensions at the cable
termination, be it solder or crimp. The slight advantage over the pin
engagemnent length would not be worth the trouble.

Despite the folklore folks, BNCs are still 50 ohm.

Anyone from Kings or any other connector manufacturer out there care
to get into this one?.

73's Bob VK1ZRE

---
Bob Ecclestone                            [e-mail]

"Imagination is more important than knowledge" Albert Einstein
---



From [e-mail] Thu Jan 02 17:50:37 1997
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From: [e-mail] (R. L. Measures )
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: Wed, 25 Dec 1996 01:42:38 -0800
Organization: Internet Access of Ventura County
Lines: 69
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]> <[e-mail]> <01bbf1bb$53725200$[e-mail]> <59p66e$[e-mail]>
NNTP-Posting-Host: port22.vcnet.com

In article <59p66e$[e-mail]>, [e-mail] (Jack Giehl) wrote:

> In article <01bbf1bb$53725200$[e-mail]>, "David
B. Holtkamp (K5KH)" <[e-mail]> wrote:
> >Dear Rich, Tom and all others who've helped me here,
> >
> >  You might remember me -- I'm the fellow with the TL-922 that was
> >experiencing intermittent arcing. Rich (especially), Tom and several others
> >tried very hard to help me out.
>
> David,
>
> I had a TL-922 about 10 years ago.  I was concerned that there was a gas
> discharge arc suppressor across the output, and that the manual warned about

> running CW with the amp in the SSB mode.
>
> After several months of operation on 75 meters running SSB with vox,
> arcing started to occur.  To my dismay I discovered that the band switch was

> arcing.  The 40 meter switch connection was badly burned and unusable.  On
> further investigation, I discovered the cause for this was that the RF input

> and output switching was performed by a rather large SLOW relay.  At the sam
e
> time, another relay was activated that enabled the bias and switched the
front
> panel lights.  The problem was that the RF relay was still experiencing
> contact bouncing with drive applied and bias enabled!
>
> I solved the problem by removing the large relay, replacing it with a P&B 3P
DT
> 110 VDC relay, with two of the poles performing the RF switching, and the
> third pole used to key the other relay.
>
> The amp NEVER arced again, and the P&B relay was much quieter.  I was also
> able to run the amp with CW in the SSB mode with no arcing.
>
> Kenwood has made a lot of money selling replacement band switches for TL-922

> amps.
>
True enough,  Jack.  Sagadenki, the company who manufactures the
bandswitch, made made money too. BTW, the crispy-crittered bandswitch in
"Parasitics Revisited" (Sept./Oct 1990 QST) was removed from a TL-922.
Some 922 owners have reported that other components failed during episodes
of bandswitch and/or tune capacitor arcing.  For instance, the zener bias
diode shorted, and/or a current meter movement failed and/or a 1A grid
choke imploded, and/or one or both tubes suddenly developed a grid to
filament short after a 'big bang' was heard.  Such damage can not be
satisfactorily explained by a simple HF switching transient.  I believe
its like Murphy said:  "Everything is more complicated than it looks"...
IMO, current transients can cause intermittent VHF parasitic
oscillations.

As technology marches on, at some point you may find that your P&B 3PDT
110 VDC relay can't switch fast enough to keep up with some of the newer
radios.  I have heard that some radios switch in 5mS.  A T/R switching
circuit that switches in 2mS is shown in "The Nearly Perfect Amplifier" in
the Jan. 1994 QST.  This circuit is a natural for the TL-922 because it
requires a +110v power supply.

The reason that Kenwood proscribes using CW on the 922's SSB (HV) tap is
because the 922's HV transformer does not have enough current capacity.
...................................  ...................................
...................................  ...................................
...................................  ...................................
...................................  ...................................
...................................  ...................................
...................................  ...................................
...................................  ...................................
...................................  ...................................

--
--Rich-- ag6k, 805-386-3734


From [e-mail] Thu Jan 02 17:50:39 1997
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From: [e-mail] (John Lundgren)
Newsgroups: alt.radio.pirate,rec.radio.amateur.homebrew
Subject: Re: Wanted: Plans for a radio jammer or spark gap transmitter
Followup-To: alt.radio.pirate,rec.radio.amateur.homebrew
Date: 25 Dec 1996 10:21:10 GMT
Organization: Delta Internet Services, Anaheim, CA
Lines: 54
Message-ID: <59qv6m$[e-mail]>
References: <[e-mail]> <59p6d8$[e-mail]> <59ol8h$[e-mail]> <[e-mail]>
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Xref: news1.epix.net alt.radio.pirate:22147 rec.radio.amateur.homebrew:22389

John Lentz ([e-mail]) wrote:
: John Lundgren wrote:

: >
: > Hay, I've got a problem.  I looked at my engine the other day when I was
: > changing oil.  Mebbe you could tell me what's wrong.  I have a 4 cylinder
: > Ford ranger, and I counted four spark plugs on one side of the engine.
: > Then I looked on the other side of the engine and there were four more.
: > It doesn't have a distributor either.
: >
: > Real strange, huh?
: >
: > --

:    Does your Ford Ranger operate?

Yeah.

:     If so, then whats the problem? As long as it is running WITHOUT a distri
butor, then
: maybe it doesn't take in any gas. With that you would be very lucky!

I wish I was so lucky ( 20 MPG).

Beats walking.  I had a flat the other day.  Got a drywall screw in the
tire.  I wish they would come up with a self-sealing tire.

I had a Delta capacitive discharge ignition on my old van, and I
connected it to an ignition coil on the bench.  I put a square wave gen
in place of the points, and cranked it up.  Man, the spark jumped 3 or 4
cm from the paper clip I had in the HT lead to the case!  About a
100KV.  Nasty!  No RFI tho, since it's CD.

You could generate RFI by taking the suppression caps out of a vacuum
cleaner motor or other small appliance.  Connect some wire to it so that
it will radiate in the FM band.  But be careful and don't get zapped.

Another thought comes to mind.  Get a Ramsey FM-4 or other FM mono TX and
instead of operating it on 12VDC, put it on 12VAC with a rectifier in
series with the AC lead.  The pulsating DC should give harmonics all over
the FM band.

--
#===================================================================#
|    John Lundgren - Elec Tech - Info Tech Svcs. |    jlundgre@     |
|    Rancho Santiago Community College District  |   deltanet.com   |
|     17th St at Bristol \ Santa Ana, CA 92706   | http://www.rancho|
| My opinions are my own, and not my employer's. |    .cc.ca.us     |
|   Most FAQs are available through Thomas Fine's WWW FAQ archive:  |
|http://www.cis.ohio-state.edu:80/hypertext/faq/usenet/FAQ-List.html|
|     "Babe Ruth struck out 1,330 times...  keep on swinging."      |
|     says the lid on the jar of Laredo & Lefty's Picante Salsa     |
!  You MAY NOT use my email address for unsolicited Email or lists! !
#======P=G=P==k=e=y==a=v=a=i=l=a=b=l=e==u=p=o=n==r=e=q=u=e=s=t======#



From [e-mail] Thu Jan 02 17:50:40 1997
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From: [e-mail] (John Lundgren)
Newsgroups: alt.radio.pirate,rec.radio.amateur.homebrew
Subject: Re: Too Many plugs , Was: Wanted: Plans for ....
Followup-To: alt.radio.pirate,rec.radio.amateur.homebrew
Date: 25 Dec 1996 10:50:27 GMT
Organization: Delta Internet Services, Anaheim, CA
Lines: 51
Message-ID: <59r0tj$[e-mail]>
References: <[e-mail]> <59p6d8$[e-mail]> <59ol8h$[e-mail]> <59pp36$[e-mail]> <[e-mail]>
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L.D.Brewer 2-Way Radio ([e-mail]) wrote:
: On Tue, 24 Dec 1996 23:21:03 -0800, woody white <"eMail "@
: my.www.page.Mailto> wrote:

: >Don't have one, but I understand that some engines now have 2
: >plugs/cylinder for better ignition distribution and a coil for each
: >cylinder (usual case for motorcycle engines).
: >              _Woody_
: >
: Welllll.....

: In the area of motorcycles, I can tell you we have been
: "Dual Plugging" Harleys for years.

: The adding of the exra plug makes the fuel burn more efficiently
: and can actually produce more horsepower.

: Last year I purchased a Dodge Ram truck with a V-10. NO distributor,
: but an interesting looking set of coils and wires going to the plugs !

: Looks like technology is going EVERYWHERE, but I don't see the
: alignment between automotive technology, and micropower broadcasting.

Well this thread started out with a request for a jammer using a spark
gap, so the connection is not that far off.

: Perhaps I am just "closed minded" :)

: Anyway, Happy Holidays from all of us to all of you !

: Doug

: L.D.Brewer 2-Way Radio
: http://www.ldbrewer.com
: [e-mail]
: 1-800-886-8023


--
#===================================================================#
|    John Lundgren - Elec Tech - Info Tech Svcs. |    jlundgre@     |
|    Rancho Santiago Community College District  |   deltanet.com   |
|     17th St at Bristol \ Santa Ana, CA 92706   | http://www.rancho|
| My opinions are my own, and not my employer's. |    .cc.ca.us     |
|   Most FAQs are available through Thomas Fine's WWW FAQ archive:  |
|http://www.cis.ohio-state.edu:80/hypertext/faq/usenet/FAQ-List.html|
|     "Babe Ruth struck out 1,330 times...  keep on swinging."      |
|     says the lid on the jar of Laredo & Lefty's Picante Salsa     |
!  You MAY NOT use my email address for unsolicited Email or lists! !
#======P=G=P==k=e=y==a=v=a=i=l=a=b=l=e==u=p=o=n==r=e=q=u=e=s=t======#



From [e-mail] Thu Jan 02 17:50:42 1997
Path: news1.epix.net!news3.epix.net!uunet!in1.uu.net!199.171.190.20!news.deltanet.com!news.deltanet.com!jlundgre
From: [e-mail] (John Lundgren)
Newsgroups: alt.radio.pirate,rec.radio.amateur.homebrew
Subject: Re: Too Many plugs , Was: Wanted: Plans for ....
Followup-To: alt.radio.pirate,rec.radio.amateur.homebrew
Date: 25 Dec 1996 10:55:13 GMT
Organization: Delta Internet Services, Anaheim, CA
Lines: 45
Message-ID: <59r16h$[e-mail]>
References: <[e-mail]> <59p6d8$[e-mail]> <59ol8h$[e-mail]> <59pp36$[e-mail]>
NNTP-Posting-Host: delta1.deltanet.com
X-Newsreader: TIN [version 1.2 PL2]
Xref: news1.epix.net alt.radio.pirate:22148 rec.radio.amateur.homebrew:22390

woody white ("eMail"@my.www.page.Mailto) wrote:
: Don't have one, but I understand that some engines now have 2
: plugs/cylinder for better ignition distribution and a coil for each
: cylinder (usual case for motorcycle engines).
:               _Woody_

: > Hay, I've got a problem.  I looked at my engine the other day when I was
: > changing oil.  Mebbe you could tell me what's wrong.  I have a 4 cylinder
: > Ford ranger, and I counted four spark plugs on one side of the engine.
: > Then I looked on the other side of the engine and there were four more.
: > It doesn't have a distributor either.
: >
: > Real strange, huh?
: >
: > --

: --
: de  Woody, WB4QXE, woody_white@worldnet_att_net (_=. No AutoMail)
: Work: Electron Microscopist/Microanalysist
: Balance: Ham radio "homebrewer", shade tree mechanic,
: '90 Nissan 240SX, wish still had my Mcycle too!
: http://www.geocities.com/capecanaveral/3722
: .

What's the highest power an electron microscope can magnify?  From what I
understand, the object has to be plated to make it conductive, so the
electrons will whatever.  So you can't see things that are live like a
bacterium.  Am I on the right track?  Maybe technology has advanced to
where this isn't the case any more.

Happy holidays.

--
#===================================================================#
|    John Lundgren - Elec Tech - Info Tech Svcs. |    jlundgre@     |
|    Rancho Santiago Community College District  |   deltanet.com   |
|     17th St at Bristol \ Santa Ana, CA 92706   | http://www.rancho|
| My opinions are my own, and not my employer's. |    .cc.ca.us     |
|   Most FAQs are available through Thomas Fine's WWW FAQ archive:  |
|http://www.cis.ohio-state.edu:80/hypertext/faq/usenet/FAQ-List.html|
|     "Babe Ruth struck out 1,330 times...  keep on swinging."      |
|     says the lid on the jar of Laredo & Lefty's Picante Salsa     |
!  You MAY NOT use my email address for unsolicited Email or lists! !
#======P=G=P==k=e=y==a=v=a=i=l=a=b=l=e==u=p=o=n==r=e=q=u=e=s=t======#



From [e-mail] Thu Jan 02 17:50:43 1997
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.iarc.com!cpk-news-feed1.bbnplanet.com!news.bbnplanet.com!su-news-hub1.bbnplanet.com!www.nntp.primenet.com!nntp.primenet.com!newsfeed1.aimnet.com!nntp.ucr.edu!info.ucla.edu!nnrp.info.ucla.edu!psgrain!qiclab.scn.rain.com!nntp0.teleport.com!singtech
From: [e-mail] (Charles Cagle)
Newsgroups: alt.fan.art-bell,alt.sci.physics.relativity,sci.astro,sci.astro.amateur,sci.physics,rec.radio.amateur.homebrew,rec.radio.amateur.antennas
Subject: Re: FAREWELL TO THE "SHIP OF THE MIND", AND TO ITS MASTER, DR. CARL SAGAN
Date: 25 Dec 1996 11:33:29 GMT
Organization: Singularity Technologies, Inc.
Lines: 11
Message-ID: <[e-mail]>
References: <5977v4$[e-mail]> <32b78403.9982069@news2> <[e-mail]> <[e-mail]>
NNTP-Posting-Host: ip-salem1-05.teleport.com
X-Newsreader: Yet Another NewsWatcher 2.2.0b7
Xref: news1.epix.net alt.fan.art-bell:31500 sci.astro:151792 sci.astro.amateur:69342 sci.physics:232091 rec.radio.amateur.homebrew:22392

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

Some fawning nonsense over the death of Carl Sagan.   Sagan was more of a
showman than a scientist.  He promoted as facts things, that at best, were
conjecture.  He could not believe in God so he looked for aliens.   He
thought life should be ubiquitous in the universe but did not understand
that the universe itself is alive.

--
C. Cagle
SingTech


From [e-mail] Thu Jan 02 17:50:43 1997
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](Jeff Anderson)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Coax Connectors Impedance (yes, there *are* 75 ohm BNCs)
Date: 25 Dec 1996 12:53:56 GMT
Organization: Netcom
Lines: 19
Message-ID: <59r854$[e-mail]>
References: <[e-mail]> <[e-mail]> <59eic1$[e-mail]> <[e-mail]>
NNTP-Posting-Host: pax-ca25-39.ix.netcom.com
X-NETCOM-Date: Wed Dec 25  6:53:56 AM CST 1996

In <[e-mail]> [e-mail] (Bob
Ecclestone) writes:

>Despite the folklore folks, BNCs are still 50 ohm.
>
>Anyone from Kings or any other connector manufacturer out there care
>to get into this one?.
>
>73's Bob VK1ZRE
>

I don't represent Kings, but in their data book they list both "BNC"
and "BNC 75 OHM."  As stated in prvious posts, the 75 ohm BNC lacks the
inner dielectric, and there is a different taper to the center mating
pin.

Happy holidays to all,

- Jeff, WA6AHL


From [e-mail] Thu Jan 02 17:50:45 1997
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!zombie.ncsc.mil!newsgate.duke.edu!agate!howland.erols.net!newspump.sol.net!mindspring!uunet!in3.uu.net!206.55.3.16!news2.mnsinc.com!news1.mnsinc.com!usenet
From: [e-mail] (Brian Carling)
Newsgroups: rec.radio.amateur.equipment,rec.radio.amateur.homebrew
Subject: New Radio Information
Date: Wed, 25 Dec 1996 13:02:45 GMT
Organization: Glowbugs
Lines: 19
Distribution: inet
Message-ID: <59rj6b$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: bry.mnsinc.com
X-Newsreader: Forte Free Agent 1.0.82
Xref: news1.epix.net rec.radio.amateur.equipment:45042 rec.radio.amateur.homebrew:22397

Hi guys - I have been organizing my links and things a little better
at the web page if anyone would enjoy seeing them in a more
organized fashion, take a look at

http://www.mnsinc.com/bry/hamlynx.htm#tubeproj

for the Glowbugs projects OR:

http://www.mnsinc.com/bry/hamlynx.htm#qrp
http://www.mnsinc.com/bry/hamlynx.htm#boatanch
etc.

MERRY CHRISTMAS & ENJOY!

73 from Bry  (((Amateur Radio G3XLQ / AF4K)))
http://www.mnsinc.com/bry
E-mail:  [e-mail]
Home of MEGALIST ham radio files, SWL info. etc. etc.



From [e-mail] Thu Jan 02 17:50:46 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!feed1.news.erols.com!news
From: [e-mail] (Michael Horowitz)
Newsgroups: rec.radio.amateur.homebrew
Subject: RC vs LC
Date: Wed, 25 Dec 1996 15:55:20 GMT
Organization: Erol's Internet Services
Lines: 11
Message-ID: <59r8ec$[e-mail]>
NNTP-Posting-Host: spg-as15s11.erols.com
X-Newsreader: Forte Free Agent 1.0.82

Folks -

   I read where LC combonations make up resonate circuits and filters,
and I see formula for their calculations. I also see RC circuits
performing as filters, just as the LC circuits do.

   Does anyone know the formula used to calculate the cutoff frequency
of a given combination of R and C?

   Thanks in advance - Mike



From [e-mail] Thu Jan 02 17:50:47 1997
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.iarc.com!cpk-news-feed1.bbnplanet.com!cpk-news-hub1.bbnplanet.com!news.bbnplanet.com!cam-news-hub1.bbnplanet.com!howland.erols.net!cliffs.rs.itd.umich.edu!news.cic.net!condor.ic.net!news2.acs.oakland.edu!newsfeed.concentric.net!news-master!news
From: [e-mail] (Darren Garrison)
Newsgroups: alt.fan.art-bell,alt.sci.physics.relativity,sci.astro,sci.astro.amateur,sci.physics,rec.radio.amateur.homebrew,rec.radio.amateur.antennas
Subject: Re: FAREWELL TO THE "SHIP OF THE MIND", AND TO ITS MASTER, DR. CARL SAGAN
Date: Wed, 25 Dec 1996 16:08:17 GMT
Organization: Concentric Internet Services
Lines: 14
Message-ID: <[e-mail]>
References: <5977v4$[e-mail]> <32b78403.9982069@news2> <[e-mail]> <[e-mail]> <[e-mail]>
NNTP-Posting-Host: cnc082052.concentric.net
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[e-mail] (Charles Cagle) wrote:

>In article <[e-mail]>, [e-mail] wrote:
>
>Some fawning nonsense over the death of Carl Sagan.   Sagan was more of a
>showman than a scientist.  He promoted as facts things, that at best, were
>conjecture.  He could not believe in God so he looked for aliens.   He
>thought life should be ubiquitous in the universe but did not understand
>that the universe itself is alive.
>
>--
>
Better to be an intelligent, literate, inquisitive showman than to be
superstitiuous and gullible.


From [e-mail] Thu Jan 02 17:50:48 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!insync!uunet!in2.uu.net!206.55.3.16!news2.mnsinc.com!news1.mnsinc.com!usenet
From: [e-mail] (Brian Carling)
Newsgroups: rec.radio.amateur.homebrew
Subject: 6BM8 Transmitter Articles
Date: Wed, 25 Dec 1996 16:09:24 GMT
Organization: Glowbugs
Lines: 33
Distribution: inet
Message-ID: <59ru4a$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: bry.mnsinc.com
X-Newsreader: Forte Free Agent 1.0.82

Does ANYONE know what has happened to this article?

It has been "disappeared" off of the WWW!

Does anyone know WHO the site belongs to?

http://www.cosmosbbs.com/

OR -

http://www.cosmosbbs.com/rac.jpg

The original articles folks were looking for there were:

http://www.cosmosbbs.com/6bm8wir.jpg

AND

http://www.cosmosbbs.com/6bm8sch.jpg

I was sorry to see them go, and will try to post them here or at
N6EV's site if possible.

MINE is running out of storage space!

HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!


73 from Bry  (((Amateur Radio G3XLQ / AF4K)))
http://www.mnsinc.com/bry
E-mail:  [e-mail]
Home of MEGALIST ham radio files, SWL info. etc. etc.



From [e-mail] Thu Jan 02 17:50:49 1997
Path: news1.epix.net!news3.epix.net!uunet!in2.uu.net!205.252.116.190!feed1.news.erols.com!howland.erols.net!news-peer.gsl.net!news.gsl.net!EU.net!Portugal.EU.net!alce!gameover.alce.pt!Pedro.Braz
From: [e-mail] (Pedro Braz)
Date: Wed, 25 Dec 96 16:24:19 GMT
Message-ID: <wgcid$16$g16000$h41$[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: TM-251E
Organization: Associacao Lusa de Correio Electronico
Lines: 17

* Forwarded from REC.RADIO.AMATEUR.MISC by Pedro Braz (16:16000/41).
* Originally by: Pedro Braz (16:16000/41), 25 Dec 96 16:22.
* Originally to: All.

Hello All.

Hello and Merry Christmas to you all.

I've bought a KenWood TM-251E and want to expand the receive band, I can't
find any mods on the internet, does anybody lnow how to do it?

e-mail: [e-mail]


                        thks
Pedro



From [e-mail] Thu Jan 02 17:50:50 1997
Path: news1.epix.net!news3.epix.net!uunet!in2.uu.net!199.94.215.18!cam-news-hub1.bbnplanet.com!news.bbnplanet.com!cpk-news-hub1.bbnplanet.com!cpk-news-feed3.bbnplanet.com!news.ipass.net![e-mail]
From: "David A. Cooley" <[e-mail]>
Newsgroups: alt.radio.pirate,rec.radio.amateur.homebrew
Subject: Re: Wanted: Plans for a radio jammer or spark gap transmitter
Date: Wed, 25 Dec 1996 11:34:05 -0500
Organization: IPass.net
Lines: 21
Message-ID: <[e-mail]>
References: <[e-mail]> <59p6d8$[e-mail]> <59ol8h$[e-mail]> <[e-mail]> <59qv6m$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: customs530.ipass.net
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.01 (Win95; I)
Xref: news1.epix.net alt.radio.pirate:22153 rec.radio.amateur.homebrew:22399

John Lundgren wrote:

>
> Beats walking.  I had a flat the other day.  Got a drywall screw in the
> tire.  I wish they would come up with a self-sealing tire.
>

Several manufacturers have them... The price is outrageous though... I
believe a 235-60-15 self sealing goodyear was around $350.00!


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 17:50:51 1997
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-4.sprintlink.net!ralph.vnet.net!news
From: [e-mail] (Si Ballenger)
Newsgroups: alt.radio.pirate,rec.radio.amateur.homebrew
Subject: Re: Wanted: Plans for a radio jammer or spark gap transmitter
Date: Wed, 25 Dec 1996 16:48:45 GMT
Organization: maybe later...
Lines: 21
Message-ID: <59rltc$[e-mail]>
References: <[e-mail]> <59p6d8$[e-mail]> <59ol8h$[e-mail]> <[e-mail]> <59qv6m$[e-mail]>
NNTP-Posting-Host: shb.vnet.net
X-No-Archive: Yes
X-Newsreader: Forte Free Agent 1.0.82
Xref: news1.epix.net alt.radio.pirate:22154 rec.radio.amateur.homebrew:22400

[e-mail] (John Lundgren) wrote:

>I had a Delta capacitive discharge ignition on my old van, and I
>connected it to an ignition coil on the bench.  I put a square wave gen
>in place of the points, and cranked it up.  Man, the spark jumped 3 or 4
>cm from the paper clip I had in the HT lead to the case!  About a
>100KV.  Nasty!  No RFI tho, since it's CD.

>You could generate RFI by taking the suppression caps out of a vacuum
>cleaner motor or other small appliance.  Connect some wire to it so that
>it will radiate in the FM band.  But be careful and don't get zapped.

>Another thought comes to mind.  Get a Ramsey FM-4 or other FM mono TX and
>instead of operating it on 12VDC, put it on 12VAC with a rectifier in
>series with the AC lead.  The pulsating DC should give harmonics all over
>the FM band.

Back to radio lala land: isn't FM pretty much imune to the spark gap types of
rfi due to it being a fully modulated signal. I don't hear those multi-mile
sparks on my radio during a thunder storm.



From [e-mail] Thu Jan 02 17:50:52 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.net!news.idt.net!news.bbnplanet.com!cam-news-hub1.bbnplanet.com!howland.erols.net!portc02.blue.aol.com!audrey01.news.aol.com!not-for-mail
From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: 25 Dec 1996 17:13:44 GMT
Organization: AOL http://www.aol.com
Lines: 20
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]
X-Newsreader: AOL Offline Reader

>The reason that Kenwood proscribes using CW on the 922's SSB (HV) tap is
>because the 922's HV transformer does not have enough current capacity.

No, the real reason the 922 is limited to one kW input on CW is it is a
copy of the 220, a one KW dc input PA. The 922 even includes the error
caused by installing grid chokes and bypass caps from the grids to the
chassis.

Even if the transformer is made bigger, other components and cooling is
marginal. The transformer problem is one of core size (KVA rating), rather
than just current.

It is not relay transients that cause arcing, it is operating the PA
briefly without a load when the relay switches incorrectly. This problem
can be cured by something as simple as tweaking the relay contact going to
the output line so it closes just before the input side of the relay.
Without closing the output contact first, nearly every PA will arc
something in the tank over.

73 Tom


From [e-mail] Thu Jan 02 17:50:53 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!news.magicnet.net!iag.net!enews.sgi.com!arclight.uoregon.edu!newsfeed.direct.ca!usenet
From: [e-mail] (Jeff Groberman)
Newsgroups: rec.radio.amateur.homebrew
Subject: Home brew rotator controller?
Date: Wed, 25 Dec 1996 17:35:26 GMT
Organization: Canada Internet Direct, Inc.
Lines: 6
Message-ID: <59rop3$22r$[e-mail]>
NNTP-Posting-Host: van-pm-0212.direct.ca
X-Newsreader: Forte Free Agent 1.0.82

I have acquired a 12 volt antenna rotator - unfortunately no
controller.  Does anyone have an idea for a circuit that would control
the rotator.  Reversing polarity is easy, but knowing where the
rotator is pointing is difficult.  Any ideas?
Jeff



From [e-mail] Thu Jan 02 17:50:54 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.stealth.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] (K1BQT)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: MC13135 Application Notes?
Date: 25 Dec 1996 18:01:09 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]

>Specifically, I would like info/formulas on converting the values
>on their application circuit (Fig. 15 on MC13135 Data Sheet) to
>receive at 72MHz instead of 49MHz.

 All you need do is scale the values provided for 49-MHz up in frequency
(the impedance shift at the mixer input probably isn't great enough to
worry about).  Same applies for the oscillator--if you are using the
chip's onboard circuit.  No need to over-engineer it.

Rick  K1BQT



From [e-mail] Thu Jan 02 17:50:57 1997
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!zombie.ncsc.mil!newsgate.duke.edu!news.mathworks.com!uunet!in2.uu.net!204.255.92.12!news.ofthe.net!not-for-mail
From: [e-mail]
Newsgroups: alt.fan.art-bell,alt.sci.physics.relativity,sci.astro,sci.astro.amateur,sci.physics,rec.radio.amateur.homebrew,rec.radio.amateur.antennas
Subject: Re: FAREWELL TO THE "SHIP OF THE MIND", AND TO ITS MASTER, DR. CARL SAGAN
Date: Wed, 25 Dec 1996 19:04:56 GMT
Organization: HubNet - Premier Internet Solutions Provider
Lines: 46
Message-ID: <59ru22$afo$[e-mail]>
References: <5977v4$[e-mail]> <32b78403.9982069@news2> <[e-mail]> <[e-mail]> <[e-mail]>
NNTP-Posting-Host: lbb18.ofthe.net
X-Newsreader: Forte Free Agent 1.0.82
Xref: news1.epix.net alt.fan.art-bell:31534 sci.astro:151831 sci.astro.amateur:69389 sci.physics:232128 rec.radio.amateur.homebrew:22404

[e-mail] (Charles Cagle) wrote:

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

>Some fawning nonsense over the death of Carl Sagan.

Thank you for your impressions.  They weren't worth the effort to read
them, but thank you anyway.

>Sagan was more of a
>showman than a scientist.

So this is a great crime against humanity?  It would be more proper to
say that he was a great populizer of science.  And, probably, more
accurate.

>He promoted as facts things, that at best, were
>conjecture.

Thank you for the wonderful references you provided.

>He could not believe in God so he looked for aliens.

Now we are getting to the point!  He didn't believe in God so he isn't
a nice guy!  Lots of people don't believe in God and don't turn out
like Hitler.  Whether or not he believed in God, is his right.

> He
>thought life should be ubiquitous in the universe but did not understand
>that the universe itself is alive.

Thank you again for posting your evidence.  We will give it the full
weight it deserves.

>--
>C. Cagle
>SingTech

Sing to old SingTech?




Information is not knowledge, knowledge is not wisdom,
wisdom is not truth, truth is not beauty, beauty is not love



From [e-mail] Thu Jan 02 17:50:57 1997
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!usenet.eel.ufl.edu!news-peer.gsl.net!news.gsl.net!howland.erols.net!feed1.news.erols.com!news
From: [e-mail] (Michael Horowitz)
Newsgroups: rec.radio.amateur.homebrew
Subject: Disc Capacitor Markings
Date: Wed, 25 Dec 1996 20:13:04 GMT
Organization: Erol's Internet Services
Lines: 7
Message-ID: <59rne1$[e-mail]>
NNTP-Posting-Host: spg-as11s40.erols.com
X-Newsreader: Forte Free Agent 1.0.82

Curious about the relationship between the markings on disc capacitors
and their values, I cruised the shelves the other day. Found the
following: '103k' on a box of .01uf, '47p' on a box marked 47pf,
'224k' on a box marked .22uf. The latter made me think the
relationship between the value and the markings was shaky.
Can anyone shed any light on what I was seeing? - Mike



From [e-mail] Thu Jan 02 17:50:58 1997
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From: [e-mail]
Newsgroups: alt.radio.pirate,rec.radio.amateur.homebrew
Subject: Re: Wanted: Plans for a radio jammer or spark gap transmitter
Date: Wed, 25 Dec 1996 12:33:50 -0800
Organization: SCVNET
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David A. Cooley wrote:
>
> John Lundgren wrote:
>
> >
> > Beats walking.  I had a flat the other day.  Got a drywall screw in the
> > tire.  I wish they would come up with a self-sealing tire.
> >
>
> Several manufacturers have them... The price is outrageous though... I
> believe a 235-60-15 self sealing goodyear was around $350.00!

Or, go to your local motorcycle shop and buy some stuff called "Slime".
Put this in your tires and never get a flat again! (unless you really
put a big hole in the tire!

However, warn the guy at the tire shop before he dismounts a
Slime-trated tire, as the stuff isn't called "Slime" without good
reason!

Meanwhile back at r.r.a.h....

George, N7TNJ


From [e-mail] Thu Jan 02 17:50:59 1997
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From: KD1YV <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Coax Connectors Impedance (yes, there *are* 75 ohm BNCs)
Date: Wed, 25 Dec 1996 16:01:07 -0500
Organization: Hamily !
Lines: 42
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Bob Ecclestone wrote:
>
> [e-mail] (Dave Martindale) wrote:
>
> >[e-mail] writes:
> >>In regard to Jeanne's query, I believe there are 75-ohm BNC's, as well as
> >>50-ohm types.  Could someone more knowledgeable tell us how to
> >>distinguish them?
> >>                                     Dave KE9ED
> >
> >There *are* BNC connectors with a characteristic impedance of 75 ohms,
> >and you will find them on some high-quality video equipment.  You can
> >identify them because the dielectric inside the connector itself is
> >air, not Teflon.  The physical dimensions of the mating parts are the same,
> >so the 50- and 75-ohm versions will connect to each other.  But the female
> >75-ohm connector has a bare center conductor socket without the usual
> >Teflon cylinder around it, while the male connector has no Teflon cylinder
> >just inside the ground contact barrel.
>
> >I guess keeping the conductor diameters the same but changing the dielectri
c
> >to air shifts the impedance to 75 ohms.  Of course, the voltage rating is
> >reduced - but these connectors are used with 1 V signals.
>
> >       Dave
>
> This is still a very contentious subject!
>
> However the bottom line is that, by definition, "BNC" is 50 ohm.
> "BNC" = Bayonet "N" Connector, which is 50 ohm.{snip}

Hmmm, ok, in computer connections, we used RG-62, which I believe is 92 ohm ca
ble.
The BNCs that we used were specifically designed for the cable (it's noticably
smaller diameter than RG-58 or RG-59.)

They were Amphenol connectors, although I don't have the part number here.

Anybody care to speculate if those connectors were really 50 ohm?  Seems like
a significant mismatch would occur.

--
73 de Jim, KD1YV
http://pw1.netcom.com/~jimkd1yv/hamily.html


From [e-mail] Thu Jan 02 17:51:02 1997
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From: Tom Woolner <[e-mail]>
Newsgroups: rec.radio.amateur.misc,rec.radio.amateur.digital.misc,rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.shortwave
Subject: Re: CW Interface
Date: Wed, 25 Dec 1996 21:46:36 +0000
Organization: Cat City Dog Pound
Lines: 22
Distribution: world
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In article <[e-mail]>, "Richard M. Corrigan"
<[e-mail]> writes
>I recently heard of a cable that attaches from you Reciever to
>the serial port of a computer which allows CW to be translated
>by your Computer for display on your monitor.  Is this true?
>I thought that a TNC was needed.  If it is true does anyone
>have the pin outs to build such a cable or maybe a source that
>I could contact to obtain one.
>
Yes it's true.  The cable has a small pcb enclosed in the 25pin D
connector, mounting a simple limiter amp. e.g. 741.  This is powered from
spare lines on the COM port.

The software - HamCom - drives the lines high + and low - for the rail
supplies and it polls a line from the amp. output at high speed.  It senses
data present and calculates validity and data value from the results.   This
can be code, rtty, hffax, etc.

Regards,
--
Tom Woolner



From [e-mail] Thu Jan 02 17:51:02 1997
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From: [e-mail] (Clint Bradford)
Newsgroups: rec.radio.amateur.homebrew
Subject: RE: QST on CD  BEWARE!!!!!
Date: Wed, 25 Dec 1996 21:53:00 GMT
Message-ID: <[e-mail]>
Organization: ATTENTION to Details BBS - Mira Loma, CA
Distribution: world
References: <59rseq$[e-mail]>
Lines: 14


>>Got both QST CD sets for Xmas.  With great anticipation, I loaded them
>>and set out to search for an article.  It took no time at all to
>>discover the search engine / viewer associated with the package truly
>>SUCKS!

I hope, Woody, that you present your finding in a calm, rational manner
- and send them to the ARRL. I am sure they will be quite receptive to
constructive criticism!

------------------------------------------------------------------------
Clint Bradford, KE6LCS/KAF3359    909.681.6210 Voice    [e-mail]
ATTENTION to Details              909.681.6221 BBS        [e-mail]
------------------------------------------------------------------------


From [e-mail] Thu Jan 02 17:51:03 1997
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From: [e-mail] (Ross Alexander)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: QST on CD BEWARE!!!!!
Date: 25 Dec 1996 22:10:27 GMT
Organization: Athabasca University
Lines: 21
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woody white <"eMail "@ my.www.page.Mailto> writes:

>Caveat Emptor!!!!!!

>Got both QST CD sets for Xmas.  With great anticipation, I loaded
>them and set out to search for an article.  It took no time at all to
>discover the search engine / viewer associated with the package truly
>SUCKS!

Since I don't run DOS (sorry, I'm one of those unix geeks) this isn't
much of a disappointment BUT could you tell us all this: are the
articles themselves broken out into individual files and in some
more-or-less parseable format (like flat ascii)?  In other words,
can one contemplate indexing the CD contents with standard WAIS tools
or something similar, or is the information wadded up into some
binary blob that can only be decoded with the supplied software?

regards,
Ross ve6pdq
--
Ross Alexander, ve6pdq  --  [phone]  --  [e-mail]


From [e-mail] Thu Jan 02 17:51:04 1997
Newsgroups: alt.radio.pirate,rec.radio.amateur.homebrew
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From: [e-mail] (Mark Zenier)
Subject: Re: Wanted: Plans for a radio jammer or spark gap transmitter
Message-ID: <[e-mail]>
Followup-To: alt.radio.pirate,rec.radio.amateur.homebrew
Organization: NETCOM On-line Communication Services (408 261-4700 guest)
References: <[e-mail]>
Date: Wed, 25 Dec 1996 22:37:09 GMT
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Xref: news1.epix.net alt.radio.pirate:22187 rec.radio.amateur.homebrew:22450

in <[e-mail]>,
:  [e-mail] wrote:
: I'm looking for some good plans for a spark gap transmitter or anything
: else that could be used for a medium range (20 to 200 feet) radio jammer.

Just put up a couple of strings of christmas lights with an intermittent
connection in one, like one of my (not yet located) neighbors.  Blows your
shortwave reception all to hell.  ZZZzzit ZZZzzit ZZZzzit ZZZzzit ZZZzzit.

Mark Zenier  [e-mail]  [e-mail]




From [e-mail] Thu Jan 02 17:51:05 1997
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From: "Ian White, G3SEK" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Disc Capacitor Markings
Date: Wed, 25 Dec 1996 23:15:43 +0000
Organization: IFW Technical Services
Lines: 43
Distribution: world
Message-ID: <[e-mail]>
References: <59rne1$[e-mail]>
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Michael Horowitz wrote:
>Curious about the relationship between the markings on disc capacitors
>and their values, I cruised the shelves the other day. Found the
>following: '103k' on a box of .01uf, '47p' on a box marked 47pf,
>'224k' on a box marked .22uf.

There are several different systems in common use.

47p is obvious.

"103k" and "224k" are less easy to read. First of all, discard the "k" -
it refers to the dielectric material and has nothing to do with the
capacitance. That leaves you with three digits to interpret.

In the three-digit system, the capacitance is in picofarads. The first
two digits are significant, and the third is the number of zeros
following the first two. So "103" is 10 followed by three zeros, ie
10000pF which is indeed 0.01uF. Likewise "224" is 22 followed by four
zeros, ie 220000pF which is 0.22uF. This system is also universally used
for chip resistors, so "103" would be 10kohms and 224 would be 220k.

The one you have to watch for is "220" etc, because the final 0 means
"no zeros". In other words "220" would mean 22 ohms or 22pF under this
marking system. But under a third system, "220" could mean simply "two
hundred and twenty", so sometimes the only solution is to measure the
component.

Yet another system would mark these same capacitors as "10n" and "22n",
where "n" stands for "nanofarad" (1000pf). To avoid confusion due to the
decimal point being illegible, the "n" is sometimes used instead, so
"4n7" would mean 4.7nF, and "6p8" would mean 6.8pF. The same applies to
resistors, so that "4k7" would be 4.7k and "2M2" would be 2.2 Mohm.

A very useful clue to identify the marking system is to check for
preferred and non-preferred values. For example, "224" would never mean
224pF because 224 isn't a standard capacitor value. It has to be some
multiple of the industry-standard preferred value 22.


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 17:51:06 1997
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From: J M Woodgate <[e-mail]>
Newsgroups: sci.electronics.design,sci.electronics.misc,rec.radio.amateur.homebrew
Subject: Re: Ideas for Low Frequency Tunable Filters
Date: Wed, 25 Dec 1996 23:46:20 +0000 (GMT)
Organization: J. M. Woodgate and Associates
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In article <59qgt3$[e-mail]>, lbliao
<URL:mailto:[e-mail]> wrote:
>
> I am looking for a low frequency tunable filter, in the range of 0.05Hz to
> say 10Hz. The filter could have a response of say double pole, so that it
> is a peaking filter. The Peaking frequency should be variable electronically
,
> which means that a variable resistor is ruled out.
>
>
> Thanks a lot!
> lbliao
>
>

Look at Maxim product data. They do both continuous-time (linear) and
switched-capacitor filters, both of which can be made
electronically-tunable, and you can get up to at least 8th-order responses
from a single chip. I have no connection with Maxim except as a satisifed
user. Maxim also treat small users better than many semiconductor
manufaturers do.

--
Regards, John Woodgate Tel. [phone]
 Fax [phone] OOO (Own Opinions Only)



From [e-mail] Thu Jan 02 17:51:08 1997
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From: "Ian White, G3SEK" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Coax Connectors Impedance (yes, there *are* 75 ohm BNCs)
Date: Thu, 26 Dec 1996 00:06:36 +0000
Organization: IFW Technical Services
Lines: 70
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 <[e-mail]> <59eic1$[e-mail]>
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Bob Ecclestone wrote:
>[e-mail] (Dave Martindale) wrote:
>
>>[e-mail] writes:
>>>In regard to Jeanne's query, I believe there are 75-ohm BNC's, as well as
>>>50-ohm types.  Could someone more knowledgeable tell us how to
>>>distinguish them?
>>>                                     Dave KE9ED
>
>
>This is still a very contentious subject!
>
>However the bottom line is that, by definition, "BNC" is 50 ohm.

Of course BNCs are available in both 50 and 75 ohm - check any connector
maufacturer's catalog and most distributors' catalogs too!

>"BNC" = Bayonet "N" Connector, which is 50 ohm.

"BNC" stands for Bayonet Neil Concelman (Neil invented the N, Concelman
the C which is a large bayonet connector, and the BNC uses ideas from
both).

Like BNCs, Ns are also available in 75 ohm, though much less commonly.

>
>The secret is the ratio of inner conductor outside diameter to outer
>conductor inside diameter (follow??!)

Yes...

>The ratio always (should) come
>out to 50 ohms.

 ... unless of course it was designed as a 75 ohm connector.

>The dielectric used will alter the loss factor (Q) and
>propagation velocity but will not (within reasonable limits) affect
>the characteristic impedance.
>
It depends what you define as "reasonable limits". In a solid dielectric
transmission line, the impedance is inversely proportional to the square
root of the dielectric constant. A coaxial connector is a short section
of transmission line, partly air and partly solid dielectric. So the
dielectric does matter - but in practice it's always PTFE in Ns and
BNCs.

>The centre conductor of a 75 ohm BNC would have to be significantly
>smaller diameter than the 50 ohm variety, to the point where it would
>be dificult to maintain the 75 ohm dimensions at the cable
>termination, be it solder or crimp. The slight advantage over the pin
>engagemnent length would not be worth the trouble.
>
All that is based on the incorrect notion that 75 ohm BNC's don't exist.
In reality they use a combination of reduced inner-conductor diameters
and air gaps to raise the impedance.

>Despite the folklore folks, BNCs are still 50 ohm.
>
Sorry, that just ain't true. Both impedances are freely available.

>Anyone from Kings or any other connector manufacturer out there care
>to get into this one?.

No need - just read the catalogs.

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 17:51:10 1997
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From: [e-mail] (Thomas Mahanna)
Newsgroups: sci.electronics.design,sci.electronics.misc,rec.radio.amateur.homebrew
Subject: Re: Ideas for Low Frequency Tunable Filters
Date: 25 Dec 1996 19:55:53 -0500
Organization: ZIPNET.NET
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: > I am looking for a low frequency tunable filter, in the range of 0.05Hz to
: > say 10Hz. The filter could have a response of say double pole, so that it
: > is a peaking filter. The Peaking frequency should be variable electronical
ly,
: > which means that a variable resistor is ruled out.

How about an MF-10? They're cheap, and easy to find. You tune them with a
clock that's 100x Fc. You can get a 4th order BPF with one chip (both
sections 2nd order X2). Meets all your requirements. Sounds interesting,
tell me more about your project. I have used the filters extensively.
Nice, cheap, easy.

-Tom



From [e-mail] Thu Jan 02 17:51:11 1997
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From: [e-mail] (John Lundgren)
Newsgroups: alt.radio.pirate,rec.radio.amateur.homebrew
Subject: Re: Wanted: Plans for a radio jammer or spark gap transmitter
Followup-To: alt.radio.pirate,rec.radio.amateur.homebrew
Date: 26 Dec 1996 01:22:18 GMT
Organization: Delta Internet Services, Anaheim, CA
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Message-ID: <59sk0a$[e-mail]>
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Si Ballenger ([e-mail]) wrote:
: [e-mail] (John Lundgren) wrote:

: >I had a Delta capacitive discharge ignition on my old van, and I
: >connected it to an ignition coil on the bench.  I put a square wave gen
: >in place of the points, and cranked it up.  Man, the spark jumped 3 or 4
: >cm from the paper clip I had in the HT lead to the case!  About a
: >100KV.  Nasty!  No RFI tho, since it's CD.

: >You could generate RFI by taking the suppression caps out of a vacuum
: >cleaner motor or other small appliance.  Connect some wire to it so that
: >it will radiate in the FM band.  But be careful and don't get zapped.

: >Another thought comes to mind.  Get a Ramsey FM-4 or other FM mono TX and
: >instead of operating it on 12VDC, put it on 12VAC with a rectifier in
: >series with the AC lead.  The pulsating DC should give harmonics all over
: >the FM band.

: Back to radio lala land: isn't FM pretty much imune to the spark gap types o
f
: rfi due to it being a fully modulated signal. I don't hear those multi-mile
: sparks on my radio during a thunder storm.

I think you meant fully _limited_ signal.

Well, the original post (cut out here) said that it only had to work a
few dozen feet.  At that distance, any RFI generator could overpower a
strong station and cause interference.  And then there is the possibility
of getting right into the IFs at 10.7 MHz, for some more interference.

Like with murphy's law, doo-doo happens.  Try it before saying it won't work.

--
#===================================================================#
|    John Lundgren - Elec Tech - Info Tech Svcs. |    jlundgre@     |
|    Rancho Santiago Community College District  |   deltanet.com   |
|     17th St at Bristol \ Santa Ana, CA 92706   | http://www.rancho|
| My opinions are my own, and not my employer's. |    .cc.ca.us     |
|   Most FAQs are available through Thomas Fine's WWW FAQ archive:  |
|http://www.cis.ohio-state.edu:80/hypertext/faq/usenet/FAQ-List.html|
|     "Babe Ruth struck out 1,330 times...  keep on swinging."      |
|     says the lid on the jar of Laredo & Lefty's Picante Salsa     |
!  You MAY NOT use my email address for unsolicited Email or lists! !
#======P=G=P==k=e=y==a=v=a=i=l=a=b=l=e==u=p=o=n==r=e=q=u=e=s=t======#



From [e-mail] Thu Jan 02 17:51:12 1997
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From: [e-mail] (Jim Kehler)
Newsgroups: rec.radio.amateur.misc,rec.radio.amateur.digital.misc,rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.shortwave
Subject: Re: CW Interface
Date: Thu, 26 Dec 1996 01:39:09 GMT
Organization: Kuentos Communications Inc.
Lines: 43
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Tom Woolner <[e-mail]> wrote:

>In article <[e-mail]>, "Richard M. Corrigan"
><[e-mail]> writes
>>I recently heard of a cable that attaches from you Reciever to
>>the serial port of a computer which allows CW to be translated
>>by your Computer for display on your monitor.  Is this true?
>>I thought that a TNC was needed.  If it is true does anyone
>>have the pin outs to build such a cable or maybe a source that
>>I could contact to obtain one.
>>
>Yes it's true.  The cable has a small pcb enclosed in the 25pin D
>connector, mounting a simple limiter amp. e.g. 741.  This is powered from
>spare lines on the COM port.

>The software - HamCom - drives the lines high + and low - for the rail
>supplies and it polls a line from the amp. output at high speed.  It senses
>data present and calculates validity and data value from the results.   This
>can be code, rtty, hffax, etc.

>Regards,
>--
>Tom Woolner

Richard,
     Check this page:

http://www.concentric.net/~n9zle/hc.html

Bruce, N9ZLE sells the hardware interface you need, and will give you the
HamComm/JVFax shareware you need to make it work.  It plugs into a
serial port on your computer, copies CW, RTTY, PACKET (crude form), SSTV,
and WEFAX pictures.  It costs a whopping $20 usually, but they are on sale
for $15 for Christmas.  Once you get the software, there are schematics in
the DOC files to show you how to build other interfaces if you are interested.
I bought one a few months ago, and use if for HF WEFAX pictures, and it
works great.  Be aware that there isn't any hardware that copies 'perfect'
CW.  How well any of the hardware devises copy is very dependent on the
strength of the received signal and the way the CW is being sent.

73, Jim KH2D




From [e-mail] Thu Jan 02 17:51:14 1997
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From: "David B. Holtkamp (K5KH)" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: 26 Dec 1996 01:50:09 GMT
Organization: The Santa Fe Institute
Lines: 54
Message-ID: <01bbf2cc$dcb4b0a0$[e-mail]>
References: <01bbf1bb$53725200$[e-mail]> <[e-mail]> <01bbf1f0$5bc36e00$[e-mail]> <[e-mail]>
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J. Fred Riley <[e-mail]> wrote in article
<[e-mail]>...
> On 24 Dec 1996 23:31:39 GMT, "David B. Holtkamp (K5KH)"
> <[e-mail]> wrote:
> >I do see quite a noticable reduction in antenna charging "spikes" that
go
> >"pop" in my receiver when the surge suppressor is in place.
>
> The answer to this I gotta hear; 'specially the theory part.

  Well, Fred, I'm not sure I can explain it to your satisfaction, but here
goes:

  We have a lot of dust, wind, and other charge-buildup sources around here
(quite dry most of the year at 7000+ ft in northern NM). I know from
experience that with the same antennas that I described earlier (G5RV and
LPA), the static buildup (particularly when the wind was blowing) would
cause loud "pops" to be heard in my HF receiver more on the lower bands but
would be audible (but less strong) up to 10 m. These pops I guess were the
static discharge through the front end of my receiver, an event that
undoubtedly does not do it any good.

  In fact, the static buildup is sometimes strong enough (in clear weather
and absolutely no lightning for hundreds of miles) that placing the
unterminated antenna connector near a good ground will demonstrate
significant sparks that are visible to the eye in a darkened room. One got
me while I was holding the connector once and grounded from my hand through
my knee into the grounded metal desk through my clothing. I was shocked --
pardon the pun -- but convinced of the reality of this charging. Other
times of the year it is not nearly so intense (light right now) but in the
Spring particularly, it is bad.

  I've also had an alarming experience when holding my LPA antenna lead
when lightning did strike a few miles away. It was a sizable strong shock
that didn't quite throw me but definitely caought my attention.  I'm
guessing the distance to the lightning strike because I didn't see the
flash directly, but heard the thunder some seconds later.  Subsequently I
was much, much more careful when holding antennas when lightning was
nearby.  Calculations for a several mile distant source at instantaneous
field strengths of many kv/m divided by r**2 and then multiplied by the
length of my antenna resulted in voltages in the hundreds of volts range.
Not to be ignored.

  As for the static pops, its a lot harder to do some sort of quantitative
analysis there, but I know from experience that I still hear the pops on
the receiver under similar static charging conditions, but the amplitude is
much reduced. Hence my conclusion that the Alpha Deltas were doing me some
good in that area.

  Hope all this is helpful!

  73s de david (K5KH)


From [e-mail] Thu Jan 02 17:51:16 1997
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From: "David B. Holtkamp (K5KH)" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: 26 Dec 1996 01:57:47 GMT
Organization: The Santa Fe Institute
Lines: 48
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> A gap would save both the bandswitch and air variable. I'd build the gap
> out of a very hard metal that has a high melting temperature. Stainless
> steel or nichrome come to mind, although there are other suitable
> materials. In the AL-82/1200/1500 the bracket that mounts the tank coil
to
> the air variable is designed with an intentional overlap that puts it
near
> the frame of the tuning capacitor. You could probably add a wide nichrome
> or stainless steel conductor to the stud of the air variable placing it
> near the frame.
>

   Thanks for the suggestions, Tom. Next time I go in, I'll take a look
around and see if I can mount something suitable where it can arc without
damaging the plates. Hopefully as you suggest, this might also preserve the
bandswitch.

>
> I am not experienced enough in plasma to answer that, but since I build
> PA's used by people who are very experienced in plasma I can ask someone.
> My gut feeling is the rise time has little to do with it in this case,
> since lightning in a cable wouldn't have a slew rate much faster than
> normal RF. But that is only a guess.

  Fair enough. I'm a nuclear physicist and never did like plasma physics
much anyway <hi>.  I think the rise time is critical for initiating a
breakdown of the gas. Remember how the old fluorescent lights used to work?
Seems like I remember that they had a HV pulse to get the discharge going,
but once triggered, it is easy to maintain. I think if one went to a much
slower rising pulse, the required voltages/powers are higher.

  As for comparisons with RF, the frequency of the RF is not really
relevant as much as the rise time of the power pulse. I think they are
significantly different from a lightning strike.

  But let's ask around. I'd be delighted to be corrected on this one
(too!).


>
> Bingo. Not only that, but it would allow you to use one with less voltage
> breakdown.

  Yep! This is the better place to put one of these, no doubt.


  73s de david (K5KH)


From [e-mail] Thu Jan 02 17:51:16 1997
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From: "David B. Holtkamp (K5KH)" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: 26 Dec 1996 02:04:22 GMT
Organization: The Santa Fe Institute
Lines: 24
Message-ID: <01bbf2ce$d9423440$[e-mail]>
References: <01bbf1bb$53725200$[e-mail]> <[e-mail]> <01bbf1f0$5bc36e00$[e-mail]> <[e-mail]>
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> These static pops are typically a few thousand volts, though their energy

> is minute. That's the corona breakover voltage of the antenna tip.

  Consistent corona discharge probably would occur only at higher altitudes
than mine (I'm at 7000 or so - I'd expect chronic corona problems at
10000). In fact, I think one fellow who had a lot to do with the design of
quad antennas built them because his yagis kept dissolving in teh chronic
corona discharges at high altitudes in Peru. Don't remember all the
details, but was interesting.

> Bad idea. The suppressor should be the outer perimeter of your station
> defense.
>

  Yep. Sounds right to me, but I'm working to find a solution.


  Thank you very, very much for your knowledge and insight into these
issues. I really appreciate your thoughts and suggestions!!!

  73s de david (K5KH)




From [e-mail] Thu Jan 02 17:51:17 1997
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From: [e-mail] (Edward J. Zeranski)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Coax Connectors Impedance (yes, there *are* 75 ohm BNCs)
Date: Thu, 26 Dec 1996 02:06:45 GMT
Organization: self
Lines: 24
Message-ID: <59sn49$[e-mail]>
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>The centre conductor of a 75 ohm BNC would have to be significantly
>smaller diameter than the 50 ohm variety, to the point where it would
>be dificult to maintain the 75 ohm dimensions at the cable
>termination, be it solder or crimp. The slight advantage over the pin
>engagemnent length would not be worth the trouble.

>Despite the folklore folks, BNCs are still 50 ohm.

>Anyone from Kings or any other connector manufacturer out there care
>to get into this one?.

>73's Bob VK1ZRE

>---
        We used 75ohm connectors  and cable on some level/interface converters
we built a few years ago. Trompeter was source. The patch cords for 75
ohms are violet, 78 ohms blue, and 50 ohms green.  The 75s looked like
the 50s except for the dialectric as mentioned in the original post.
The 78 onm cable was twinax.





From [e-mail] Thu Jan 02 17:51:18 1997
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From: "Ron Sibbitt" <[e-mail]>
Newsgroups: rec.ham-radio.swap,rec.radio.amateur.boatanchors,rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.swap
Subject: -FS-  450ohm Ladder-Line DPDT Switchs
Date: 26 Dec 1996 02:22:52 GMT
Organization: A.R.S. N8LMT
Lines: 20
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FOR SALE:
Double-Pole - Double-Throw Knife Switches
these are great for use in 450 or 300 ohm
ladder line antenna systems, to switch
between two antennas or from one antenna to
two different tuners, etc... they are made
in USA by Leviton, plastic base, all brass
metal parts, 1.25" x 2.25" in size, 6/32 brass
screws for connections. I have seen similar
ones at radio shack (for switching tv lead-in),
but these Levitons are a LOT more heavy duty.
I have used them at KW levels with no problems.
I have about 50 of them left...
I'll mail you 3 switchs for $10. postpaid (USA).

Ron Sibbitt  N8LMT
5885 Galbraith Line Road
Croswell, MI 48422

Ph 810-679-3535    e-mail  [e-mail]


From [e-mail] Thu Jan 02 17:51:19 1997
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From: woody white <"eMail "@ my.www.page.Mailto>
Newsgroups: rec.radio.amateur.homebrew
Subject: QST on CD  BEWARE!!!!!
Date: Wed, 25 Dec 1996 18:30:39 -0800
Organization: http://www.geocities.com/capecanaveral/3722
Lines: 35
Message-ID: <59rseq$[e-mail]>
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Caveat Emptor!!!!!!

Got both QST CD sets for Xmas.  With great anticipation, I loaded them
and set out to search for an article.  It took no time at all to discover
the search engine / viewer associated with the package truly SUCKS!  You
can enter EXACT key words for the title (* wildcard is permitted) or the
author or call,  - or recall an (month) issue.  If you remember an
article, but not who wrote it or the exact title, you are SOL!  ...Start
loading one issue after another (10 years!) and PAGING through until you
find the table of contents, then type that into the search engine.
I didn't think QST would be so crude.

I am going to call QST and complain.  If enough of us do, or tell them we
won't buy it until improved, maybe, just maybe, they will offer what
should be a free upgraded search engine with some sophistication!

A MINIMUM improvment would be a seperate "file" containing the table of
contents for all issues archived.  This should then be set up so that you
could page through the ToC and click on the article - then the program
would ask for the appropriate CD and fetch the article.  That would seem
to me to be a patently obvious feature for such a large database.  That
is my first thought.  I may have more ideas if I can bring myself to ever
use the thing, as awkward as it is!

I I have missed something here let me know and I will be humbled.  If
not, I am disgruntled.   Any comments are welcome!

73,
--
de  Woody, WB4QXE, woody_white@worldnet_att_net (_=. No AutoMail)
Work: Electron Microscopist/Microanalysist
Balance: Ham radio "homebrewer", shade tree mechanic,
'90 Nissan 240SX, wish still had my Mcycle too!
http://www.geocities.com/capecanaveral/3722
.


From [e-mail] Thu Jan 02 17:51:21 1997
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From: "Dale R. Parfitt" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: QST AUG-96 2mtr notch filter"L1"?
Date: Wed, 25 Dec 1996 22:06:19 -0500
Organization: PAR Electronics
Lines: 37
Message-ID: <[e-mail]>
References: <59mbsq$[e-mail]>
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To: Jack Kovar KE0AX <[e-mail]>

Jack Kovar KE0AX wrote:
>
>         QST has a great article in AUG 96 page 42 for building your own
>
> notch filter for 2 meter pager inteference problems.
>
> My problem is that I have not been able to find discribed value for L1.
>
> Should I just use the formula for series resonant circuits and put in a
>
> value of 1 to 14 pf for C2?
>
> I have a box of bidirectional couplers with a male to female N connectors.
>
> SMA sampling ports are dented.
>
> A dandy box for this project if anyone is interested in one.
>
> ANYWAY if someone would care to throw a value at me for L1 I will run
>
> and check my math.
>
>                                         Thanks,
>
>                                                 Jack Kovar
>                                                    K0VAR
>
>                                         Toddville, Iowa
> Hi Jack,
The value appeared in a feedback about 2 or 3 issues after the original
article. The problem I see with the design is the relatively shallow
notch- about 20 to 30 dB as I recall. Our filters achieve a notch depth
of over 50 dB with an in-band insertion loss of 0.5 dB worst case. In
addition, ours are transparent at 70 cM for dual band rigs w/ a single
RF port.

Dale W4OP


From [e-mail] Thu Jan 02 17:51:22 1997
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From: [e-mail] (Dave)
Newsgroups: rec.radio.amateur.boatanchors,rec.radio.amateur.homebrew,rec.radio.swap
Subject: WTB: Old Heath SB-610, SB-430, SB-101/2, dead ones - just want the cases
Date: 26 Dec 1996 04:04:43 GMT
Organization: Netcom
Lines: 53
Message-ID: <59stgr$[e-mail]>
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Hi again! NEED MORE OLD SB-xxx BOXES!! (smaller ones):


I'm the guy hunting old SB-xxx boxes.  You've probably seen my
posts lately.  I am building a completely homebrew vintage station using
old SB boxes for the chassis, and completely reworking them.  It's
coming along well so far.  I've been trading around the groups
to acquire all of the luscious parts of the last 40 years that they
just don't make anymore.

I now have 2 SB-101/2 boxes, and now I'm turning my attention to the
speaker, and the station console which will contain a vintage design
tube speed keyer, 24 hour mechanical (!) clock, and tube TR switch.



Here's what I need to buy:

I need to find ANY old SB-610, SB-614, SB-xxx, SB-xxx-matching-speaker box,
SB-430, or ANY other of the smaller SB-series boxes that have the same
box style, but are smaller.  GUTS ARE NOT NECESSARY, but won't go to
waste if included.  I save EVERYTHING to homebrew with.  Price range
of $10 to $25 is about as high as I can go.  Other than the case, faceplate,
and chassis being undented, looks are absolutely unimportant, and if
ugly = cheap, then sell me ugly!




The station lineup will be a 3 tube (actually 6 sections, so in the old
days would have been 6 tube!) super-het for 80m with a converter for
160, 40 & up. The transmitter is all band 160-10 (no warc) 50 watts CW only
with a built-in VFO.  When I find a third SB-102 or SB-101 box, that
will be for an 811 (250 watt) amplifier to match the series.

I'm painting all the boxes Collins-esque two tone grey. All of the dials are
old National or clones of that, including SCN verniers.

So dig in those garages and see what old dead SB stuff is there.  I have
been paying around $20 for a SB-102 case, less parts (one had parts and
the fellow generously left 'em in - not a speck to be wasted!).  Again, I
don't need ANY working units or any boxes with values much higher than
$10-$25.  I just can't afford them.

email inquiries to:

Dave    [e-mail]

Tacoma, WA

Thanks alot in advance, and Happy Holidays to all.


From [e-mail] Thu Jan 02 17:51:22 1997
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From: "CJ Lagos" <[e-mail]>
Newsgroups: rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.amateur.misc
Subject: Wanted: TM-V7A Mod
Date: 26 Dec 1996 05:12:47 GMT
Organization: Midnight Communications
Lines: 2
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If anyone has a TM-V7A mod PLEASE send it to [e-mail]
Thank you.


From [e-mail] Thu Jan 02 17:51:23 1997
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From: "W.S.H." <[e-mail]>
Newsgroups: rec.radio,rec.radio.amateur.homebrew,rec.radio.amateur.misc,rec.radio.cb,rec.radio.scanner
Subject: PL Codes??
Date: 26 Dec 1996 05:17:08 GMT
Organization: HTS/PCSD
Lines: 21
Message-ID: <01bbf2ec$683f4080$[e-mail]>
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Please correct me if I'm Wrong!

USER    FREQ
   08         88.5
   12       100.0
   16       114.8
   18       123.0
   19       127.3
   20       131.8
   21       136.5
   24       151.4

Please correct my mistakes or please advise is the above is correct. It
will be of great assistance!!

Please send replies to the following e-mail address!

Thanks in ADVANCE!
--
Shane H.
[e-mail]


From [e-mail] Thu Jan 02 17:51:24 1997
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From: [e-mail] (Robert M. Bratcher Jr.)
Newsgroups: alt.radio.pirate,rec.radio.amateur.homebrew
Subject: Re: Wanted: Plans for a radio jammer or spark gap transmitter
Date: Thu, 26 Dec 1996 05:33:01 GMT
Organization: AT&T WorldNet Services
Lines: 11
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]> <01bbf1fb$a043bde0$310f2399@peter-s> <59qjpf$[e-mail]>
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Take a relay. Wire it as a buzzer. Feed raw AC to it.
Instant SPARK Gap! I fed 18 volts from a toy train transformer to one
in my teens (back in the early 70's). Connected to a 100 ft longwire
antenna it radiated for 6 blocks...

Robert M. Bratcher Jr.
E-mail to:
[e-mail]
Record collector, 8mm, super 8, 16 and 35mm Film collector.
I like old radio's too.
Collins, Hallicrafters, National & Hammurland are my Favorites!


From [e-mail] Thu Jan 02 17:51:25 1997
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From: [e-mail] (Rog42)
Newsgroups: rec.radio.amateur.homebrew
Subject: F.S. - Tubes, radios, books and more...
Date: 26 Dec 1996 06:23:52 GMT
Organization: AOL http://www.aol.com
Lines: 7
Message-ID: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

FOR SALE:  Tubes, test equipment, radios including Hallicrafters,
Hammarlund, and Philco. Other older tube type radios and radio related
publications.  Schematics for many radios just $1.  Tube Manuals, Tube
Substitution books, Service Manuals, QST magazines, much more from the
30's, 40's, 50's, 60's.  Now over 1500 different tube types in stock -
E-mail [e-mail] and ask for my latest offerings on RADIO list  -
#1224-T.


From [e-mail] Thu Jan 02 17:51:26 1997
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From: Doug Schiffer <[e-mail]>
Newsgroups: alt.fan.art-bell,alt.sci.physics.relativity,sci.astro,sci.astro.amateur,sci.physics,rec.radio.amateur.homebrew,rec.radio.amateur.antennas
Subject: Re: FAREWELL TO THE "SHIP OF THE MIND", AND TO ITS MASTER, DR. CARL SAGAN
Date: Thu, 26 Dec 1996 01:38:43 -0500
Organization: ServiceTech, Inc.
Lines: 40
Message-ID: <[e-mail]>
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Charles Cagle wrote:
>
> In article <[e-mail]>, [e-mail] wrote:
>
> Some fawning nonsense over the death of Carl Sagan.

Will so many remember you at your death?

> Sagan was more of a
> showman than a scientist.

A corpus of over 200 scientific papers written by Sagan soundly refutes
your vaccous claim.

>  He promoted as facts things, that at best, were conjecture.
   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Gentle readers of this, please make a note of this comment.

Exactly WHAT are you refering to?  Please, exactly which conjectures did
Carl promote?  Be specific.

>  He could not believe in God so he looked for aliens.

In my mind, aliens are more likely that a god or gods.  And Carl
frequently made note that it was entirely possible that we are alone
in the cosmos.

BTW: Doesn't a god fit into your category of "conjecture"?

>  He thought life should be ubiquitous in the universe but did not  >understa
nd that the universe itself is alive.

Your statement makes it implied that YOU think that the universe is
alive.

Support your claim, or admit it is not fact, but is pure conjecture
on your part.

It seems to me that you are doing exactly what you claim Sagan did.
And further, I'll bet you don't have 200+ scientific papers to your
name.


From [e-mail] Thu Jan 02 17:51:28 1997
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From: woody white <"eMail "@ my.www.page.Mailto>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: QST on CD BEWARE!!!!!
Date: Wed, 25 Dec 1996 22:53:44 -0800
Organization: http://www.geocities.com/capecanaveral/3722
Lines: 36
Message-ID: <59sbs2$[e-mail]>
References: <59rseq$[e-mail]> <59s8oj$[e-mail]>
NNTP-Posting-Host: 207.146.142.159
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 2.01E (Win16; I)

A quick (DOS) look at the stuff indicates the bulk of the data is *.tif
files broken down by subdirectories into year/month with a code number
for the filename.   :-( so far as other search methods...
_Woody_

Ross Alexander wrote:
>
> woody white <"eMail "@ my.www.page.Mailto> writes:
>
> >Caveat Emptor!!!!!!
>
> >Got both QST CD sets for Xmas.  With great anticipation, I loaded
> >them and set out to search for an article.  It took no time at all to
> >discover the search engine / viewer associated with the package truly
> >SUCKS!
>
> Since I don't run DOS (sorry, I'm one of those unix geeks) this isn't
> much of a disappointment BUT could you tell us all this: are the
> articles themselves broken out into individual files and in some
> more-or-less parseable format (like flat ascii)?  In other words,
> can one contemplate indexing the CD contents with standard WAIS tools
> or something similar, or is the information wadded up into some
> binary blob that can only be decoded with the supplied software?
>
> regards,
> Ross ve6pdq
> --
> Ross Alexander, ve6pdq  --  [phone]  --  [e-mail]

--
de  Woody, WB4QXE, woody_white@worldnet_att_net (_=. No AutoMail)
Work: Electron Microscopist/Microanalysist
Balance: Ham radio "homebrewer", shade tree mechanic,
'90 Nissan 240SX, wish still had my Mcycle too!
http://www.geocities.com/capecanaveral/3722
.


From [e-mail] Thu Jan 02 17:51:29 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.amateur.misc,rec.radio.scanner,rec.radio.swap,alt.radio.scanner
Subject: Re: PRO 26 MOD ? is there one?
Date: Thu, 26 Dec 1996 09:24:43 GMT
Organization: Netspace Internet Services
Lines: 22
Message-ID: <59t8qn$[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: node13.wamego.midusa.net
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[e-mail] wrote:

>Is there a mod for cellular for the Pro 26?  I have one source that says
>there is.  I would like to get a few more references before I attempt
>it.  Any help would be greatly appreciated.  Thank you.


>Nick Yatko
>[e-mail]

There is a mod for the Pro-26, but you will have to order some parts
for it. You can either order just the UK CPU which takes a
considerable amount of skill, or you can get the logic board with the
CPU already attached. The latter doesnt even require soldering skills,
mainly screwdriver skills. Look at http://www.demon.co.uk/javiation/
for more information under the the Pro-26 subpage. This mod would make
the Pro-26 an awesome handheld. I wish that I had a few extra $$ to
spend.

Wiggie




From [e-mail] Thu Jan 02 17:51:31 1997
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From: [e-mail] (R. L. Measures )
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: Thu, 26 Dec 1996 04:39:23 -0800
Organization: Internet Access of Ventura County
Lines: 10
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
NNTP-Posting-Host: port16.vcnet.com

In article <[e-mail]>,
[e-mail] wrote:
...snip....
> My grandpap used to say "You reap what you sow". That fits this case
> better.

Amen to that.

--
--Rich-- ag6k, 805-386-3734


From [e-mail] Thu Jan 02 17:51:32 1997
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From: [e-mail] (W6KKT Jesse)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Clamping Diode
Date: Thu, 26 Dec 1996 13:39:13 GMT
Organization: Microserve Information Systems (800)-380-INET
Lines: 30
Distribution: world
Message-ID: <[e-mail]>
References: <59l13l$[e-mail]> <[e-mail]> <01bbf1fa$32387760$310f2399@peter-s>
NNTP-Posting-Host: dyn0.frazmtn.com
X-Newsreader: Forte Agent .99e/16.227

On 25 Dec 1996 00:26:35 GMT, "Peter Gottlieb" <[e-mail]>
wrote:

>Wes Stewart <[e-mail]> wrote in article
><[e-mail]>...
>> The term might describe many things.  For instance, a common function is
>to
>> clamp (limit) the reverse voltage spike generated in a switched inductive
>load
>> (such as a relay) when the current is turned off.  A transistor switch in
>this
>> case might be destroyed by the reverse polarity voltage applied to the
>> collector.  The diode across the coil limits this voltage to
>approximately
>> .65V and saves the transistor.
>
>
>It's a positive spike - check it with a 'scope.  And the diode will slow
>down the
>release of the relay because it keeps current flowing longer in the coil.
>If you
>use a MOSFET usually you can forget the diode because many 'Fets are rated
>for breakdown operation.
>
>But your main point is entirely correct.
>
>
Hi Peter,  I use diodes across relay coils when I wan't them to open
faster not slower!  Where have I gone wrong?
73, Jesse, W6KKT


From [e-mail] Thu Jan 02 17:51:34 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Coax Connectors Impedance (yes, there *are* 75 ohm BNCs)
Date: 26 Dec 1996 15:05:39 GMT
Organization: AOL http://www.aol.com
Lines: 39
Message-ID: <[e-mail]>
References: <59sn49$[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]
X-Newsreader: AOL Offline Reader

In article <59sn49$[e-mail]>, [e-mail]
(Edward J. Zeranski) writes:

>
>>Despite the folklore folks, BNCs are still 50 ohm.
>
>>Anyone from Kings or any other connector manufacturer out there care
>>to get into this one?.
>
>>73's Bob VK1ZRE
>
>>---
>       We used 75ohm connectors  and cable on some level/interface
converters
>we built a few years ago. Trompeter was source. The patch cords for 75
>ohms are violet, 78 ohms blue, and 50 ohms green.  The 75s looked like
>the 50s except for the dialectric as mentioned in the original post.
>The 78 onm cable was twinax.

There are 75 ohm BNC's and N's, and 50 ohm BNC and N's.

I have both types downstairs. The 75 ohm N's have a smaller pin, screwing
a 50 ohm male into the female 75 ohms N will ruin it.

The 75 BNC's use the same center conductor, but have mostly air dielectric
inside instead of a sold PTFE or poly insulation.

My Suhner Connector catalog lists 50 ohm and 75 ohm connectors (under
different part numbers) for BNC, TNC, and N types.

Suhner includes a warning on N types that 75 ohm and 50 ohm connectors can
not be mated because of center pin size differences, but they also
indicate it is NOT a problem with BNC's and TNC's because only the
dielectric is different!

So there really are 50 or 75 ohms BNC, TNC and N connectors. But there are
no 50 ohm UHF type connectors,, hi.

73 Tom


From [e-mail] Thu Jan 02 17:51:35 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: 26 Dec 1996 15:05:42 GMT
Organization: AOL http://www.aol.com
Lines: 44
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] (R. L. Measures ) writes:

> Such damage can not be
>satisfactorily explained by a simple HF switching transient.  I believe
>its like Murphy said:  "Everything is more complicated than it looks"...
>IMO, current transients can cause intermittent VHF parasitic
>oscillations.

In the past you claimed there was only ONE cause of PA problems for
everything from boiling gold to melting glass, and acing tubes to sparking
capacitors, PARASITICS. Even though we now suddenly hear a Murphy quote
saying everything is more complicated than it looks, the answer is
still.....PARASITICS.

The new claim is:  The HF risetime of 1/2 uS or faster is too slow to
induce parasitics, but relay switching or bias rise time is not.

Look at what happens when the relay is closed. The cathode bypass and
coupling capacitors are all charged to cut off bias, and the dc common
mode current in the filament choke is near zero.

When the relay closes, the bypass capacitors must discharge through the
relay contacts and meter shunts to ground. The coupling capacitors must
discharge through the dominant common mode impedance of the filament
choke. We know the current rise time of the choke is much slower than the
HF operating frequency, or the choke wouldn't be a good choke. Rise time
from relay closure has to be much slower than the operating frequencies
rise time, or none of these bypass and coupling components would be
effective.

Closing the relay too late or too slow ONLY causes a problem if the PA is
operated without a load (even for a few RF cycles). If Jack would have
just tweeked the contacts slightly, making the output RF contact close
before the input RF contact, the problem also would have gone away.

As with the problem Dave had (caused by the lightning suppressor arcing)
Jack ran the PA without a load for a second. In both cases it allowed the
tank circuit to build up HF energy until something arced.

The parasitic induced tank arcing claim, like so many others, is
incorrect.

73 Tom


From [e-mail] Thu Jan 02 17:51:37 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!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.homebrew
Subject: Re: Good source for amplifier tips
Date: 26 Dec 1996 15:05:46 GMT
Organization: AOL http://www.aol.com
Lines: 77
Message-ID: <[e-mail]>
References: <01bbf2ce$d9423440$[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]
X-Newsreader: AOL Offline Reader

In article <01bbf2ce$d9423440$[e-mail]>, "David B.
Holtkamp (K5KH)" <[e-mail]> writes:

>  Consistent corona discharge probably would occur only at higher
altitudes
>than mine (I'm at 7000 or so - I'd expect chronic corona problems at
>10000). In fact, I think one fellow who had a lot to do with the design
of
>quad antennas built them because his yagis kept dissolving in teh chronic
>corona discharges at high altitudes in Peru. Don't remember all the
>details, but was interesting.

I have corona problems here Dave, at a few hundred feet above sea level.
In Death Valley, they even occur below sea level. We are talking receive,
not transmit.

The problem is the accumulation of charges during proper weather
conditions. There are a great many causes. Dust storms, snow storms, rian
storms (even on the horizon) or even wind can cause this effect.

I disagree with the theory that ionization of the discharge tube would
help your receive problems. While I do not know a lot about the mechanics
of the dischrage tube, I have considerable experience with receiving
systems and noise elimination.

There are two sources of noise invoved in this, one is the sizzle or whine
of the actual corona discharge, the other is the pop of an small arc in
the system. Grounding the antenna, using a bleeder resistor, or any for of
discharge tube will NOT affect the sizzle or whining noise from corona.
Only a change in voltage gradient or RF impednce of the antenna near the
point of discharge will affect this type of noise.

A quad is quieter than a vertical for one reason, the quad antenna has a
less abrupt point at the highest end and the sharpest ends (corners) are
usually not at the high impedance area of the antenna. The high impedance
noise source has to directly couple noise energy into the antenna at a
lower impedance point. The antenna also has a large area spread out over
the highest point in the system, minimizing discharge.

Since current is very low in the discharge (but the voltage very high),
the discharge off the high end impedance of the vertical couples noise
energy into the antenna more effectively. Plus the tendency for corona is
generally greater in the vertical, because a single point sticks up and
concentrates the electric field.

The smoother, rounnder, and larger the area of the antenna, the less
corona.

So much for the sizzle.

The pop is caused when something (for example the feed cable) charges up.
Eventually the voltage breakdown of a coupling capacitor (such as the
variable capacitors in a T network tuner) or air gap (as found in a switch
or connector) breaks down. That's the loud pop.

You will hear this pop with a gas discharge tube, or a spark gap. The only
cure for this pop is a leakage path across "the thing" charging up. Either
a high value resistor or a choke works equally well, since the charging
current is very very low.

DC grounded elements eliminate the "pop" caused by the sudden arc
discharge described above, but can NOT reduce or eliminate corna noises at
the operating frequency. A 100k resistor across the feedline would do as
much as a choke, and both would be much more effective than the gas
discharge tube at reducng that effect.

Personally, I think the discharge tube is a waste of time unless you want
additional but marginal protection for close-by strikes. The only sure
protection is to totally disconnect the feedlines and AC connections from
the rig by unplugging them.

The goal is to save money on repairs, and that transmission surge
suppressor has already cost money and time. A $10 relay and ten cent
resistor would do much more, unless you plan on operating during lightning
storms.

73 Tom


From [e-mail] Thu Jan 02 17:51:38 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!newsfeed.internetmci.com!news.tds.net!news
From: Tim Gillespie <[e-mail]>
Newsgroups: alt.fan.art-bell,alt.sci.physics.relativity,sci.astro,sci.physics,rec.radio.amateur.homebrew,rec.radio.amateur.antennas
Subject: Re: FAREWELL TO THE "SHIP OF THE MIND", AND TO ITS MASTER, DR. CARL SAGAN
Date: Thu, 26 Dec 1996 10:06:46 -0500
Organization: TDS Telecom - Madison, WI
Lines: 26
Message-ID: <[e-mail]>
References: <5977v4$[e-mail]> <32b78403.9982069@news2> <[e-mail]> <[e-mail]> <[e-mail]>
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Charles Cagle wrote:
>
> In article <[e-mail]>, [e-mail] wrote:
>
> Some fawning nonsense over the death of Carl Sagan.

I'll leave the utter irony of this statement as an exercise for the
reader.

> Sagan was more of a showman than a scientist.

Carl Sagan was the chairman of the Astronomy department at Cornell
University. Furthermore, he was a scientific consultant to NASA on many
projects. Sounds like a scientist to me. Unfortunately, most scientists
do not have a talent for making scientific ideas known to the layman.
Carl Sagan did have that talent. All of his books (even the fiction)
conveyed scientific knowledge to the layman in a way that was lucid and
understandable. And, yes, he was a showman. His presence in the Cosmos
series was what made the series so compelling.

> He promoted as facts things, that at best, were conjecture.

This is another pitiful jab. I suggest, Mr. Cagle, that you actually
READ some of Sagan's material. When you do, you will see that Dr. Sagan
NEVER stated ANYTIHNG as fact that was not widely known to be fact.
Anything that was speculative was clearly stated as such.


From [e-mail] Thu Jan 02 17:51:39 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!news1.digital.com!pa.dec.com!nntpd.lkg.dec.com!peavax.eng.pko.dec.com!usenet
From: "L.Mark Pilant" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: QST on CD  BEWARE!!!!!
Date: Thu, 26 Dec 1996 10:26:14 -0500
Organization: Digital Equipment Corporation
Lines: 43
Message-ID: <[e-mail]>
References: <59rseq$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: pilant.zko.dec.com
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
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I also got both CD sets, and have a few comments.  First off, what you
get:

    1)  A rather simple search engine (as has already been noted).
    2)  Individual scanned (black and white) images of each page of
        an issue.  (This includes the front cover, but I'm not sure
        about the back cover.)
    3)  "Database" containing the article name, column name, author's
        name and call, issue, and page number.

Given the pages were scanned and not OCRed, there isn't much you can
do for searching the actual issue text.  However, I did find the data
file used to build the database on the first CD of both sets.  This
contains all the index information in a raw text format.

Without too much work, it would be possible to build a better search
engine.  It would be nice if the ARRL was able to do/offer this, but
time will tell.  Certainly, it would be possible to move the raw data
files to a system with better tools.

One thing I also noted: the search engine doesn't use standard Microsoft
data entry accelerators.  In other words, TAB doesn't get you to the
next field, but ENTER does; HOME and END don't work in the text entry
fields, but the arrow keys do.  Sigh...

Having worked in the software field for the past 20+ years, I'd say
there is room for improvement (a understatement :-)

HOWEVER, if you look at the CD sets as a way to acquire the information
with about the same search capabilities as a paper index (such as you
might find published in the January issues of many magazines), you'd
be just about on target.  (My main gripe here is the search results
don't include the issue, so you can spend a lot of time swapping CDs.
I've already let the ARRL know about this.)

I'm happy with my purchase, and I'll be purchasing the remaining CDs
whe they come out.  I'd expect the ARRL to offer improvements as more
and more people use the software and offer suggestions.

73

- Mark  N1VQW
[e-mail]


From [e-mail] Thu Jan 02 17:51:40 1997
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From: Jake Brodsky <[e-mail]>
Newsgroups: alt.radio.pirate,rec.radio.amateur.homebrew
Subject: Re: Wanted: Plans for a radio jammer or spark gap transmitter
Date: Thu, 26 Dec 1996 10:58:46 -0500
Organization: Utter Chaos
Lines: 16
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]> <01bbf1fb$a043bde0$310f2399@peter-s>
Reply-To: [e-mail]
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Peter Gottlieb wrote:

> We simply used a signal gen and little RF amp.  Makes a nice silence on
> an FM radio.  For AM and records (this was before CD's) we used Motorola
> 4 Watt UHF portables placed against the common wall right behind the
> stereo.  Kinda makes the speaker cones want to pop out, ya know?

I did the same thing, several years ago, using an IFR service monitor.
Used a real slow subadible signal and real wide FM deviation. The
target of this awfulness took WEEKS to figure out what was going on.

--
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 17:51:41 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!newsfeed.internetmci.com!news.zeitgeist.net!news.greatbasin.net!usenet
From: [e-mail] (L. T. Dollars V)
Newsgroups: alt.fan.art-bell,alt.sci.physics.relativity,sci.astro,sci.astro.amateur,sci.physics,rec.radio.amateur.homebrew,rec.radio.amateur.antennas
Subject: Re: FAREWELL TO THE "SHIP OF THE MIND", AND TO ITS MASTER, DR. CARL SAGAN
Date: Thu, 26 Dec 1996 16:19:52 GMT
Organization: Western Bunker Provisioners, Inc.
Lines: 25
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On 25 Dec 1996 11:33:29 GMT, [e-mail] (Charles Cagle)
wrote:

->In article <[e-mail]>, [e-mail] wrote:
->
->Some fawning nonsense over the death of Carl Sagan.   Sagan was more
of a
->showman than a scientist.  He promoted as facts things, that at
best, were
->conjecture.  He could not believe in God so he looked for aliens.
He
->thought life should be ubiquitous in the universe but did not
understand
->that the universe itself is alive.
->
->--
->C. Cagle
->SingTech

Damn straight. Sagan didn't even get NOMINATED for the
Angstrom Medal. What I want to know is how cheap
showmen like Sagan are so well known when true
beacons of light like Velikovsky's are shrouded
and shunned by the dominantliberalmedia.



From [e-mail] Thu Jan 02 17:51:42 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!news.sprintlink.net!news-peer.sprintlink.net!howland.erols.net!cliffs.rs.itd.umich.edu!newsxfer2.itd.umich.edu!uunet!in1.uu.net!128.138.240.25!boulder!spot.Colorado.EDU!tiemann
From: [e-mail] (TIEMANN BRUCE)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Clamping Diode
Date: 26 Dec 1996 17:22:37 GMT
Organization: University of Colorado, Boulder
Lines: 21
Message-ID: <59uc8t$[e-mail]>
NNTP-Posting-Host: spot.colorado.edu
NNTP-Posting-User: tiemann

In article <[e-mail]>,
W6KKT Jesse <[e-mail]> wrote:

>Hi Peter,  I use diodes across relay coils when I wan't them to open
>faster not slower!  Where have I gone wrong?

You haven't.  The fastest passive way to rid inductors of current is to
decide how much back bias you are willing to tolerate, and then put a
ZENER DIODE of this rating across the coil in series with a regular diode
going the other way (to prevent conduction when the coil is energized).

A regular diode only drops 0.6 volts, so that voltage times the coil's
diminishing current is the power dissipated in the diode - equal to the
rate of energy loss stored in the coil's magnetic field.  If you could
tolerate 60 volts, then the power (same current x 60 volts instead of 0.6
volts) would be 100 times more, and the magnetic energy in the coil would
be sapped 100 times more rapidly.

Bruce
N6URH



From [e-mail] Thu Jan 02 17:51:43 1997
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From: "Joe B. Clark" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: M.E.M.F.T.A.C., info wanted-------MODULATION OF EARTH'S MAG. FIELD-appeared in early '60's QST!!!
Date: Thu, 26 Dec 1996 11:27:45 -0600
Organization: TCA Communications
Lines: 57
Message-ID: <[e-mail]>
Reply-To: [e-mail]
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------------30405D7A695C10
Content-Transfer-Encoding: 7bit
Content-Type: text/plain; charset=us-ascii

Does anyone have the old QST (from the early '60's) that describes this
novel form of communication? A few points I remember---required low
power, about 50W to reliably communicate several thousand miles, free
from qrm,etc. Involved unique antenna systems by which you could "tune"
to a specific magnetic line of force (earth's magnetic field), modulate
it, and use as a medium for communication.  I have never seen
m.e.m.f.t.a.c. (modulation of earth's magnetic field to affect
communication) mentioned again.

Any info is welcome.

Thanks very much, es bcnu!

de kc5itc, Joe, in Tx

73 es holiday wishes!

------------30405D7A695C10
Content-Transfer-Encoding: 7bit
Content-Type: text/html; charset=us-ascii

<HTML><BODY>

<DT>Does anyone have the old QST (from the early '60's) that describes
this novel form of communication? A few points I remember---required low
power, about 50W to reliably communicate several thousand miles, free from
qrm,etc. Involved unique antenna systems by which you could "tune"
to a specific magnetic line of force (earth's magnetic field), modulate
it, and use as a medium for communication.  I have never seen m.e.m.f.t.a
.c.
(modulation of earth's magnetic field to affect communication) mentioned
again. </DT>

<DT> </DT>

<DT>Any info is welcome.</DT>

<DT> </DT>

<DT>Thanks very much, es bcnu!</DT>

<DT> </DT>

<DT>de kc5itc, Joe, in Tx</DT>

<DT> </DT>

<DT>73 es holiday wishes! </DT>

</BODY>
</HTML>
------------30405D7A695C10--



From [e-mail] Thu Jan 02 17:51:44 1997
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!uunet!in3.uu.net!198.6.9.51!news.thepoint.net!news.iquest.net!PAT
From: [e-mail] (Patrick Croft)
Newsgroups: rec.radio.amateur.homebrew
Subject: Need HV Pwr Supply Parts
Date: 26 Dec 1996 18:48:16 GMT
Organization: IQuest Network Services
Lines: 11
Message-ID: <59uheg$[e-mail]>
NNTP-Posting-Host: ind-0005-16.iquest.net
X-Newsreader: News Xpress Version 1.0 Beta #4

Rebuilding a old homebrew amp.  I would be interested in purchasing power supp
ly components like;

Plate transformer w/240vac pri - rated from 3KVA up, goal of 5-6KV DC, will us
e doubler or bridge, so...
                  Ideally, a hypersil, but, what you got?
Oil filter cap(s) rated for the above, and providing a total of 80+ MFD.  Goin
g in a rack, so needn't be small.

Once I get this completed, I'll be adding/upgrading the decks, so let me know
if you have Heavy Duty amp items.

Happy frying!

WB9IQI



From [e-mail] Thu Jan 02 17:51:46 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.idt.net!feed1.news.erols.com!news
From: Schiwapew Woapalanne <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Wanted: Plans for a radio jammer or spark gap transmitter
Date: Thu, 26 Dec 1996 11:20:34 -0800
Organization: Wipunxit Wiechcheu
Lines: 45
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: spg-as37s05.erols.com
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.0 (Win16; U)
To: [e-mail]

> [e-mail] wrote:
> >
> > I'm looking for some good plans for a spark gap transmitter or anything el
se that could be used for a medium range (20 to 200 feet) radio jammer. I've b
een loo
> >
> > -----
> > [e-mail]
> > -------------------==== Posted via Deja News ====-----------------------
> >       http://www.dejanews.com/     Search, Read, Post to Usenet
>
> How about a Tesla coil from Edmund Scientific. For experimental use
> only, right?! hehehehe!!!!   ;-)
>
><snip><

FOR INFORMATIONAL PURPOSES

.....and if a Tesla Coil is too scientific, check out the JC WHITNEY
automotive supplies catalog.  They sell Model T Ford Ignition Coils.
They were about $50, last time I noticed them - suggested "tongue in
cheek"
or perhaps "tongue on secondary electrodes"?   ;-{

:::::::::::::::::::::::::LEGAL DISCLAIMER
FOLLOWS::::::::::::::::::::::::::

Before using the Model T Ford Ignition Coil for other than its intended
purposes; contact the Federal Communications Commission to determine
what
class of license is currently required, should this utilization exceed
the letter and spirit of Part 15 (or other applicable section) of the
FCC
Rules and Regulations.  Note that Broad Band Jamming, while perceived as
useful
for loud neighborhood radios, may also interfere with Public Safety,
Aviation,
Marine Distress (depending where one is located), wireless baby
monitors, etc.

Willful and knowingly violating the Communications Act of 1934 (Yes, it
is still
valid) is punishable by a fine of up to $10,000, a prison term of not
more than
two years, or both!  (As they say on TV,  It's the law!)

::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::


From [e-mail] Thu Jan 02 17:51:47 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
From: Schiwapew Woapalanne <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: CB/Walkie Talkie Mods?
Date: Thu, 26 Dec 1996 11:37:15 -0800
Organization: Wipunxit Wiechcheu
Lines: 42
Message-ID: <[e-mail]>
References: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: spg-as37s05.erols.com
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.0 (Win16; U)
To: [e-mail]

The Nihilist wrote:
>
>
>QUEST:  I'm curious as to whether or not a CB and/or toy walkie
> talkies can be modified to use different frequencies.

ANS:  Yes, they can but you are limited by law and type acceptance
practices from doing this.  There are some instances wherein they
may legally be converted to the Amateur Service.  As you didn't list
a call sign of any sort, it is difficult to advise more specifically.

>QUEST:  For instance;  I work for a place where I can get ahold of
> crystals with, say, 7.91430  MHz written on them.  If I was to get 2
> of these and solder them into the slot originally occupied by the
> walkie talkies' 49 MHz crystal, would that work?

ANS:  I doubt if this will work.  It would depend on the type of crystal
being used in the transmit and receive portions of the Walkie-Talkie.
Your hypothetical 7.91430 MHz crystal is probably a fundemental freq
type.
Most of the cheap W/Ts use multiple 3rd or 5th overtone crystals
operating
on the desired frequency.  Some of the more expensive types may use low
freq crystals, but have more complex hetrodyning circuitry.
>
>  QUEST:  As far as CBs go, if I bought an old CB that was crystal
> controlled, then went to RadioShack and bought those ancient scanner
> crystals and plugged them in, would this work for both broadcasting
> and receiving?

ANS:  You might luck out and it would work, but it is very doubtful
that the scanner xtals would get you any place close to where you want
to
be.  Also, as this would obviously not be converting into the licensed
amateur service range, it would be illegal and would not comply with
normal type acceptance guidelines.
>
> Thanks in advance for any help.

ANS:  You're welcome.   :-}  Dave
>
> The Nihilist


From [e-mail] Thu Jan 02 17:51:49 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!news.kei.com!news.thenet.net!uunet!in3.uu.net!165.87.194.248!news-m01.ny.us.ibm.net!news-s01.ny.us.ibm.net!not-for-mail
From: Andy Moss <[e-mail]>
Newsgroups: rec.radio,rec.radio.amateur.homebrew,rec.radio.amateur.misc,rec.radio.cb,rec.radio.scanner
Subject: Re: PL Codes??
Date: Thu, 26 Dec 1996 11:57:13 -0800
Organization: Trailing-Edge Technologies
Lines: 38
Message-ID: <[e-mail]>
References: <01bbf2ec$683f4080$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: slip129-37-157-160.on.ca.ibm.net
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
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To: "W.S.H." <[e-mail]>
Xref: news1.epix.net rec.radio.amateur.homebrew:22453 rec.radio.amateur.misc:121797 rec.radio.cb:39989 rec.radio.scanner:74120

W.S.H. wrote:
>
> Please correct me if I'm Wrong!
>
> USER    FREQ
>    08         88.5
>    12       100.0
>    16       114.8
>    18       123.0
>    19       127.3
>    20       131.8
>    21       136.5
>    24       151.4
>
> Please correct my mistakes or please advise is the above is correct. It
> will be of great assistance!!

Shane, CTCSS tones are usually numbered/identified with a LL (letter
letter) or LN (letter number) type scheme.

Ie:     100.0Hz = 1Z
        123.0Hz = 3Z
        241.8Hz = M6

There are about 42 odd standardized CTCSS tone frequencies.  Many CTCSS
encoder/decoder circuits can not deal with more than 32 different tones
- simply because they don't have enough divider/address lines/aka DIP
switches.  If your radio is using the above numbers for CTCSS tone
frequencies they could be totally different on another radio.  To
confuse the matter some more, there are several non-standard CTCSS tone
frequencies in use too.  I find it best to use the full frequency in Hz
just to avoid any possible confusion.  Hopefully your encoder/decoder
with be compatible.


--
Andy Moss
"I often fantasize about my inability to daydream....."


From [e-mail] Thu Jan 02 17:51:50 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!arclight.uoregon.edu!news.reference.com!news.mtholyoke.edu!umass.edu!robby.oit.umass.edu!nscs26p14.remote.umass.edu
From: "Andy" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Converting 49 MHz radios to 6M
Date: 26 Dec 96 20:35:18 GMT
Organization: University of Massachusetts, Amherst
Lines: 6
Message-ID: <01bbf36c$5ee05bc0$[e-mail]>
NNTP-Posting-Host: robby.oit.umass.edu
X-Newsreader: Microsoft Internet News 4.70.1155

A while back (maybe 6 months) somebody posted a message about converting RS
walkie talkies to 6M.  Supposedly, they had a crystal for transmit and
receive, and all you had to do was change the crystals, because the
frequencie difference was so little.  Has anyone had any experience with
this or converting any other walie talkies?  Thanks,
                Andy, KB0MMU


From [e-mail] Thu Jan 02 17:51:50 1997
Path: news1.epix.net!news3.epix.net!uunet!in3.uu.net!199.94.215.18!news.bbnplanet.com!cam-news-hub1.bbnplanet.com!cam-news-feed5.bbnplanet.com!llnews.ll.mit.edu!usenet
From: [e-mail] (Max)
Newsgroups: sci.electronics.design,sci.electronics.misc,rec,rec.radio.swap,rec.radio.amateur.homebrew
Subject: PCB line impedance
Date: Thu, 26 Dec 1996 20:43:28 GMT
Organization: M.I.T. Lincoln Laboratory
Lines: 15
Message-ID: <32c2dab2.12141631@llnews>
X-Newsreader: Forte Free Agent 1.1/32.230
Xref: news1.epix.net sci.electronics.design:28802 sci.electronics.misc:19177 rec.radio.swap:101313 rec.radio.amateur.homebrew:22463



http://users.aol.com/maxfro/private/mstrip.html

The above URL will calculate the impedance of your line traces.
also a list of Dielectric Constants of Material is availabe there too.

I will add a list of popular types of circuit board material "Er" that
is available, like FR-4, Duroid, and etc...

any browser that supports JavaScript, Netscape, IE, etc...will work.

Thanks,
Max



From [e-mail] Thu Jan 02 17:51:51 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.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!199.60.19.15!news.island.net!slip30
From: [e-mail] (Steve & Gale Carlisle)
Newsgroups: rec.radio.amateur.homebrew
Subject: Need help for SERVO CONTROL
Date: 26 Dec 1996 20:48:48 GMT
Organization: Island Internet Customer
Lines: 14
Message-ID: <59uobg$[e-mail]>
NNTP-Posting-Host: slip30.north.island.net
X-Newsreader: News Xpress Version 1.0 Beta #3




        I am hopeing a fellow HAM would be able to give me some advice on the
        design of a low cost,  CLOSED LOOP SERVO CONTROLLER that would support
        ttl signals that provide for motor pulse(step) and direction. All the
        info that I have come across so far deals with motion control chips
        like the LM628/629. These chips are very expensive and require a host
        processor. This application is for antenna control. The servo,s that I
        have provide the incremental encoder output pulses. Any help on this
        project would be greatly appreciated.


                                                Thanks, Steve Carlisle VE7AHL


From [e-mail] Thu Jan 02 17:51:52 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.idt.net!feed1.news.erols.com!news.bconnex.net!news.abs.net!aplcen.apl.jhu.edu!cpk-news-feed3.bbnplanet.com!news.ipass.net![e-mail]
From: "David A. Cooley" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: GE Master II conversion
Date: Thu, 26 Dec 1996 15:52:26 -0500
Organization: IPass.net
Lines: 12
Message-ID: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: customs541.ipass.net
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Hello all,
Acquiring a GE Master II low VHF radio tomorrow and was wondering where
I can find instructions for converting it to 6m.
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 17:51:53 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!agate!news.ucsc.edu!sol.ucolick.org!sutin
From: [e-mail] (Brian Sutin)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Converting 49 MHz radios to 6M
Date: 26 Dec 1996 20:57:13 GMT
Organization: Lick Observatory UCSC
Lines: 17
Message-ID: <59uor9$[e-mail]>
References: <01bbf36c$5ee05bc0$[e-mail]>
NNTP-Posting-Host: sol.ucolick.org

"Andy" <[e-mail]> writes:
>A while back (maybe 6 months) somebody posted a message about converting RS
>walkie talkies to 6M.  Supposedly, they had a crystal for transmit and
>receive, and all you had to do was change the crystals, because the
>frequencie difference was so little.  Has anyone had any experience with
>this or converting any other walie talkies?  Thanks,
>               Andy, KB0MMU

Helmet-mounted military-surplus 50 MHz tranceivers can be purchased for
about $50 each, and already cover most of the 6M ham band.  All you have
to do is get a 3.2V battery/supply.  Unlike RS HT's, these won't break
when you shoot them, either.

Brian Sutin *** UCO/Lick Observatory *** Santa Cruz, CA 95064 *** KD6TLA
Boruch bn Michael bn Lion bn Benjamin bn Moishe bn Nachum Sutin Ha'Levi
  Fred:   "May I rescue you?"                                  `Top Hat'
  Ginger: "No, thank you.  I prefer being in distress."        RKO  1935


From [e-mail] Thu Jan 02 17:51:55 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!news.kei.com!newsfeed.internetmci.com!newsserv.freeway.net!not-for-mail
From: ken cubilo <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: klm multi2700 help
Date: Thu, 26 Dec 1996 18:16:17 -0500
Organization: ken cubilo electric inc.
Lines: 8
Message-ID: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: pm7-07.freeway.net
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
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X-Mailer: Mozilla 3.0Gold (Win95; I)

dont know if this is the proper group for this question but here goes
does anyone know on a old klm multi2700 2mtr xcvr if there is some
sort of rf front end protection hidden somewhere  rx section was zapped
by 10 watts tx due to relay failure. have replaced transistors but
cant get good performance out of the unit.the if boards are fine
i also dont have a schematic so am shooting in the dark any help
greatly appreciated
73 we8w


From [e-mail] Thu Jan 02 17:51:57 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.spies.com!stevem
From: [e-mail] (Stephen E. Muther)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Converting 49 MHz radios to 6M
Date: 26 Dec 1996 23:22:07 GMT
Organization: Canonical Nameworks
Lines: 39
Message-ID: <59v1av$[e-mail]>
References: <01bbf36c$5ee05bc0$[e-mail]> <59uor9$[e-mail]>
NNTP-Posting-Host: vax.area.com

In article <59uor9$[e-mail]>,
Brian Sutin <[e-mail]> wrote:
>"Andy" <[e-mail]> writes:
>>A while back (maybe 6 months) somebody posted a message about converting RS
>>walkie talkies to 6M.  Supposedly, they had a crystal for transmit and
>>receive, and all you had to do was change the crystals, because the
>>frequencie difference was so little.  Has anyone had any experience with
>>this or converting any other walie talkies?  Thanks,
>>              Andy, KB0MMU
>
>Helmet-mounted military-surplus 50 MHz tranceivers can be purchased for
>about $50 each, and already cover most of the 6M ham band.  All you have
>to do is get a 3.2V battery/supply.  Unlike RS HT's, these won't break
>when you shoot them, either.
>
>Brian Sutin *** UCO/Lick Observatory *** Santa Cruz, CA 95064 *** KD6TLA
>Boruch bn Michael bn Lion bn Benjamin bn Moishe bn Nachum Sutin Ha'Levi
>  Fred:   "May I rescue you?"                                  `Top Hat'
>  Ginger: "No, thank you.  I prefer being in distress."        RKO  1935

All you have to do with the RS units is replace the crystals.  The TX
crystal is at the operating frequency (3rd or 5th overtone) the RX
crystal is the receive freq. - the 10.7MHz IF.  All I did was blow up
the tiny schematic in the back of the manual on a copy machine and
send it to Cal Crystal with a note saying "Make me TX and RX crystals
for 52.525MHz that will work in this radio." and they took it from
there.  International Crystals can also do this.

You can adjust the input antenna matching coil and TX PA coil for
slight improvements, but in general, they don't need to be
modified any further. I also looked up the RX IC and found out
where to put a squelch control and added one.

I'd like to hear more about the military headsets.  Where does one
get them for $50?

Steve M.
WF6R



From [e-mail] Thu Jan 02 17:51:58 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!news.kei.com!newsfeed.internetmci.com!in2.uu.net!199.171.190.20!news.deltanet.com!news.deltanet.com!jlundgre
From: [e-mail] (John Lundgren)
Newsgroups: alt.radio.pirate,rec.radio.amateur.homebrew
Subject: Re: Wanted: Plans for a radio jammer or spark gap transmitter
Date: 27 Dec 1996 00:26:14 GMT
Organization: Delta Internet Services, Anaheim, Ca
Lines: 30
Message-ID: <59v536$[e-mail]>
References: <[e-mail]> <[e-mail]>
NNTP-Posting-Host: delta1.deltanet.com
X-Newsreader: TIN [version 1.2 PL2]
Xref: news1.epix.net alt.radio.pirate:22193 rec.radio.amateur.homebrew:22477

Mark Zenier ([e-mail]) wrote:
: in <[e-mail]>,
: :  [e-mail] wrote:
: : I'm looking for some good plans for a spark gap transmitter or anything
: : else that could be used for a medium range (20 to 200 feet) radio jammer.

: Just put up a couple of strings of christmas lights with an intermittent
: connection in one, like one of my (not yet located) neighbors.  Blows your
: shortwave reception all to hell.  ZZZzzit ZZZzzit ZZZzzit ZZZzzit ZZZzzit.

: Mark Zenier  [e-mail]  [e-mail]

My shortwave reception is shotto hell because of RFI from TV sets, 4.5
MHz, EMI from the flyback and horizontal circuitry, etc.  Then there is
the RFI from all the computers around me.  It's sure hard to receive
decent signals on any receiver below 30 MHz.

--
#===================================================================#
|    John Lundgren - Elec Tech - Info Tech Svcs. |    jlundgre@     |
|    Rancho Santiago Community College District  |   deltanet.com   |
|     17th St at Bristol \ Santa Ana, CA 92706   | http://www.rancho|
| My opinions are my own, and not my employer's. |    .cc.ca.us     |
|   Most FAQs are available through Thomas Fine's WWW FAQ archive:  |
|http://www.cis.ohio-state.edu:80/hypertext/faq/usenet/FAQ-List.html|
|     "Babe Ruth struck out 1,330 times...  keep on swinging."      |
|     says the lid on the jar of Laredo & Lefty's Picante Salsa     |
!  You MAY NOT use my email address for unsolicited Email or lists! !
#======P=G=P==k=e=y==a=v=a=i=l=a=b=l=e==u=p=o=n==r=e=q=u=e=s=t======#



From [e-mail] Thu Jan 02 17:52:00 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!newsfeed.internetmci.com!paperboy.ids.net!brainiac.com!usenet
From: Kevin Koziol <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Converting 49 MHz radios to 6M
Date: 27 Dec 1996 00:50:25 GMT
Organization: KD1NW
Lines: 8
Message-ID: <59v6gh$[e-mail]>
References: <01bbf36c$5ee05bc0$[e-mail]> <59uor9$[e-mail]> <59v1av$[e-mail]>
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I think you can get the headset units from Fair Radio. They should have the ba
tteries too. I
think these units put out about 100 mW. They are popular with paintball enthus
iasts. If anyone
get crystals made for the RS units please ask for the specs on the crystals an
d post it here.
It would be easier when ordering crystals for these radios. I like the sound o
f the RS units,
I don't think I would go out in public with a radio helmet! I imagine the RS u
nits operate at
a similar power level as the headset, right? Seems like a cheap way to outfit
my wife and I
with a couple of 6 meter handhelds. 73 KD1NW



From [e-mail] Thu Jan 02 17:52:01 1997
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From: "Ron Sibbitt" <[e-mail]>
Newsgroups: rec.ham-radio.swap,rec.radio.amateur.boatanchors,rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.swap
Subject: Re: -FS-  450ohm Ladder-Line DPDT Switchs
Date: 27 Dec 1996 00:55:47 GMT
Organization: A.R.S. N8LMT
Lines: 18
Message-ID: <01bbf390$1901a900$616794ce@n8lmt>
References: <01bbf2d3$03dc2180$LocalHost@n8lmt>
NNTP-Posting-Host: 206.148.103.97
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Sorry Everybody! but.....
****SOLD OUT****
NO SWITCHES LEFT !!!!!


Ron Sibbitt <[e-mail]> wrote in article
<01bbf2d3$03dc2180$LocalHost@n8lmt>...
> FOR SALE:
> Double-Pole - Double-Throw Knife Switches
> these are great for use in 450 or 300 ohm
> ladder line antenna systems, .....etc...etc....
>
> Ron Sibbitt  N8LMT
> 5885 Galbraith Line Road
> Croswell, MI 48422
>
> Ph 810-679-3535    e-mail  [e-mail]
>


From [e-mail] Thu Jan 02 17:52:01 1997
Path: news1.epix.net!news3.epix.net!uunet!in3.uu.net!194.112.16.44!news.nacamar.de!nntp.uio.no!in1.nntp.cais.net!news2.cais.com!news
From: "Ron Sibbitt" <[e-mail]>
Newsgroups: rec.ham-radio.swap,rec.radio.amateur.boatanchors,rec.radio.amateur.homebrew,rec.radio.swap
Subject: 450ohm Ladder-Line Switches **SOLD OUT**
Date: 27 Dec 1996 01:02:01 GMT
Organization: A.R.S. N8LMT
Lines: 3
Message-ID: <01bbf390$fac56020$616794ce@n8lmt>
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sorry, none left...
tnx to all who got a few!!
73, ron


From [e-mail] Thu Jan 02 17:52:03 1997
Path: news1.epix.net!news3.epix.net!uunet!in2.uu.net!205.252.116.190!feed1.news.erols.com!news.bbnplanet.com!cpk-news-hub1.bbnplanet.com!newsfeed.internetmci.com!idir.net!gawain
From: [e-mail] (Jeff Lutes)
Newsgroups: rec.radio.amateur.homebrew,sci.electronics.design
Subject: Re: Wanted: Tips for constructing water cooled load
Date: Fri, 27 Dec 96 01:31:34 GMT
Organization: Internet Direct Communications
Lines: 32
Message-ID: <59v8u8$[e-mail]>
References: <[e-mail]> <59e1vd$[e-mail]> <[e-mail]> <[e-mail]>
NNTP-Posting-Host: gawain.computer-services.com
X-Newsreader: News Xpress 2.0 Beta #2
Xref: news1.epix.net rec.radio.amateur.homebrew:22447 sci.electronics.design:28785

Try this one...have seen one built for a MUCH larger load...but should still
work:

        Powder the following components:
                Copper
                non-conductive plastic
                graphite

Mix them (play with the ratios to get the correct value) and pack them into a
piece of PVC pipe.  Place a copper conductor through the end caps and seal the

end caps on the pipe.  (i.e. build a resistor from HELL).

The one I saw was actually in a 5-gallon bucket full of oil for cooling.


In article <[e-mail]>, Gary Tait

<[e-mail]> wrote:
>On Sat, 21 Dec 1996, Mark Robinson wrote:
>
>#> : I am wanting to build a non-inductive 8 kW load for 300 kHz, CW.  The
>#
>#Given the low frequency, what about a few toaster elements, or 1kW
>#linear quartz halogen flood lamp bulbs (adjust impedance by adjusting
>#drive :)
>#
>
>No, toaster elements ,and lightbulbs are inductive as well, and no
>good as an RF load.
>
>Gary Tait , VE3VBF
>
>


From [e-mail] Thu Jan 02 17:52:04 1997
Path: news1.epix.net!news3.epix.net!uunet!in1.uu.net!128.83.139.5!cs.utexas.edu!news.cs.utah.edu!news.cc.utah.edu!news
From: David Whipple <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: homebrew yagi
Date: Thu, 26 Dec 1996 19:06:46 -0700
Organization: University of Utah Computer Center
Lines: 13
Message-ID: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: ctsasync55.cc.utah.edu
Mime-Version: 1.0
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I'm pretty new and electronic-illeterate.  Is there anything wrong with
using a wooden frame and wires to create a cheap, makeshift yagi?  I
know you can make quat antennas with the same materials, but I'd be
interesting in any way of making a _cheap_ 2 meter yagi without needing
too much expertize.  I've made a simple groundplane with a chasis mount
and a couple of wire coathangers, and I'd like a yagi equally as cheap.

Any input would be great.

Thanks

David
KC7MJR


From [e-mail] Thu Jan 02 17:52:05 1997
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.homebrew
Subject: Re: GE Master II conversion
Date: Thu, 26 Dec 1996 18:44:47 -0800
Organization: ABC Radio Network Engineering - Dallas
Lines: 25
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
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To: [e-mail]

David A. Cooley wrote:
>
> Hello all,
> Acquiring a GE Master II low VHF radio tomorrow and was wondering where
> I can find instructions for converting it to 6m.
> Thanks,
> Dave

What band range is the GE MSTR II???If the combination number doesnt end
with a 33 (IE: MC74KAN33) but a 23 or 13, you are out of luck...a 33 is
the 42-50Mhz version...the 13 is good to go to 10mtrs (25-36 Mhz)...the
23 series is good for nothing except parts (36-42 Mhz!)

To move a MSTR II 33 series to 6mtrs, order new xtals from any good
manfacturer like ICM (say for 52.525 Mhz simplex), solder the xtals in
CAREFULLY into the ICOMs, and then retune! make sure the radio WORKS on
the current channel first before attempting to retune...
You will need a signal generator (for the rcvr), a voltmeter or GE test
set to tune the LO and exciter, and a wattmeter to set the output!

73
Chris
WB5ITT

GE/Midland/Motorola Certified Tech


From [e-mail] Thu Jan 02 17:52:06 1997
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From: "Dale R. Parfitt" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Coax Connectors Impedance (yes, there *are* 75 ohm BNCs)
Date: Thu, 26 Dec 1996 22:47:13 -0500
Organization: PAR Electronics
Lines: 78
Message-ID: <[e-mail]>
References: <[e-mail]>
         <[e-mail]> <59eic1$[e-mail]>
         <[e-mail]> <[e-mail]>
NNTP-Posting-Host: wpb-175.magg.net
Mime-Version: 1.0
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Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 2.02 (Win95; I)
To: "Ian White, G3SEK" <[e-mail]>

Ian White, G3SEK wrote:
>
> Bob Ecclestone wrote:
> >[e-mail] (Dave Martindale) wrote:
> >
> >>[e-mail] writes:
> >>>In regard to Jeanne's query, I believe there are 75-ohm BNC's, as well as
> >>>50-ohm types.  Could someone more knowledgeable tell us how to
> >>>distinguish them?
> >>>                                     Dave KE9ED
> >
> >
> >This is still a very contentious subject!
> >
> >However the bottom line is that, by definition, "BNC" is 50 ohm.
>
> Of course BNCs are available in both 50 and 75 ohm - check any connector
> maufacturer's catalog and most distributors' catalogs too!
>
> >"BNC" = Bayonet "N" Connector, which is 50 ohm.
>
> "BNC" stands for Bayonet Neil Concelman (Neil invented the N, Concelman
> the C which is a large bayonet connector, and the BNC uses ideas from
> both).
>
> Like BNCs, Ns are also available in 75 ohm, though much less commonly.
>
> >
> >The secret is the ratio of inner conductor outside diameter to outer
> >conductor inside diameter (follow??!)
>
> Yes...
>
> >The ratio always (should) come
> >out to 50 ohms.
>
>  ... unless of course it was designed as a 75 ohm connector.
>
> >The dielectric used will alter the loss factor (Q) and
> >propagation velocity but will not (within reasonable limits) affect
> >the characteristic impedance.
> >
> It depends what you define as "reasonable limits". In a solid dielectric
> transmission line, the impedance is inversely proportional to the square
> root of the dielectric constant. A coaxial connector is a short section
> of transmission line, partly air and partly solid dielectric. So the
> dielectric does matter - but in practice it's always PTFE in Ns and
> BNCs.
>
> >The centre conductor of a 75 ohm BNC would have to be significantly
> >smaller diameter than the 50 ohm variety, to the point where it would
> >be dificult to maintain the 75 ohm dimensions at the cable
> >termination, be it solder or crimp. The slight advantage over the pin
> >engagemnent length would not be worth the trouble.
> >
> All that is based on the incorrect notion that 75 ohm BNC's don't exist.
> In reality they use a combination of reduced inner-conductor diameters
> and air gaps to raise the impedance.
>
> >Despite the folklore folks, BNCs are still 50 ohm.
> >
> Sorry, that just ain't true. Both impedances are freely available.
>
> >Anyone from Kings or any other connector manufacturer out there care
> >to get into this one?.
>
> No need - just read the catalogs.
>
> 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.

Ian's comments are absolutely correct, including the derivation of BNC.
Anyone that does not believe that 75 Ohm BNC or N connectors exist
simply does not know what they are talking about.

Dale W4OP


From [e-mail] Thu Jan 02 17:52:07 1997
Path: news1.epix.net!news3.epix.net!uunet!in1.uu.net!206.229.87.25!news.sprintlink.net!news-peer.sprintlink.net!news.bbnplanet.com!cpk-news-hub1.bbnplanet.com!mindspring!cssun.mathcs.emory.edu!news.service.emory.edu!hobbes.cc.uga.edu!not-for-mail
From: [e-mail] (Michael Covington)
Newsgroups: rec.radio.amateur.homebrew
Subject: Hamfest, Los Angeles?
Date: 27 Dec 1996 04:31:43 GMT
Organization: University of Georgia, Athens
Lines: 10
Message-ID: <59vjff$[e-mail]>
NNTP-Posting-Host: aisun1.ai.uga.edu
X-Newsreader: TIN [UNIX 1.3 PL.1(UGAI)]

Is there a hamfest or swap meet in the Los Angeles area on Jan. 12?

I seem to recall some huge thing held at TRW every month, or something...
what are the dates?

--
Michael A. Covington                http://www.ai.uga.edu/faculty/covington/
Artificial Intelligence Center                                           <><
The University of Georgia               Unless otherwise indicated, I am not
Athens, GA 30602-7415 U.S.A.         speaking officially for the University.


From [e-mail] Thu Jan 02 17:52:08 1997
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From: [e-mail]
Newsgroups: alt.radio.scanner,rec.radio.scanner,rec.radio.swap,rec.radio.amateur.homebrew,rec.radio.amateur.equipment,
Subject: RS PRO 26
Date: Thu, 26 Dec 1996 22:38:59 -0600
Lines: 4
Message-ID: <[e-mail]>
NNTP-Posting-Host: slip166-72-206-140.tx.us.ibm.net
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I posted a few days ago saying I could get hold of a RS PRO-26 for $200
from a PAWN shop.  It sells for around $450 from RS.  I believe this is
a good price even though I would only get a 30 day warrenty.  No one
responded What do you think about the deal?


From [e-mail] Thu Jan 02 17:52:09 1997
Path: news1.epix.net!news3.epix.net!uunet!in3.uu.net!206.229.87.25!news.sprintlink.net!news-peer.sprintlink.net!news-peer.gsl.net!news.gsl.net!uwm.edu!msunews!news
From: Jim Alberts <[e-mail]>
Newsgroups: alt.radio.scanner,rec.radio.scanner,rec.radio.swap,rec.radio.amateur.homebrew,rec.radio.amateur.equipment,
Subject: Re: RS PRO 26
Date: Thu, 26 Dec 1996 23:47:25 -0500
Organization: Michigan State University
Lines: 7
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: pm131-03.dialip.mich.net
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[e-mail] wrote:
>
> I posted a few days ago saying I could get hold of a RS PRO-26 for $200
> from a PAWN shop.  It sells for around $450 from RS.  I believe this is
> a good price even though I would only get a 30 day warrenty.  No one
> responded What do you think about the deal?
I purchased mine new for about $350 so I would say $200 is a fair deal.


From [e-mail] Thu Jan 02 17:52:10 1997
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From: [e-mail](Randal Dean)
Newsgroups: alt.fan.art-bell,alt.sci.physics.relativity,sci.astro,sci.astro.amateur,sci.physics,rec.radio.amateur.homebrew,rec.radio.amateur.antennas
Subject: Re: FAREWELL TO THE "SHIP OF THE MIND", AND TO ITS MASTER, DR. CARL SAGAN
Date: 27 Dec 1996 04:56:05 GMT
Organization: Netcom
Lines: 31
Message-ID: <59vkt5$[e-mail]>
References: <5977v4$[e-mail]> <32b78403.9982069@news2> <[e-mail]> <[e-mail]> <[e-mail]> <[e-mail]>
NNTP-Posting-Host: dal-tx5-39.ix.netcom.com
X-NETCOM-Date: Thu Dec 26 10:56:05 PM CST 1996
Xref: news1.epix.net alt.fan.art-bell:31642 sci.astro:152097 sci.astro.amateur:69620 sci.physics:232310 rec.radio.amateur.homebrew:22482

In <[e-mail]> [e-mail] (L. T.
Dollars V) writes:
>
>On 25 Dec 1996 11:33:29 GMT, [e-mail] (Charles Cagle)
>wrote:
>
>->In article <[e-mail]>, [e-mail] wrote:
>->
>->Some fawning nonsense over the death of Carl Sagan.   Sagan was more
>of a
>->showman than a scientist.  He promoted as facts things, that at
>best, were
>->conjecture.  He could not believe in God so he looked for aliens.
>He
>->thought life should be ubiquitous in the universe but did not
>understand
>->that the universe itself is alive.
>->
>->--
>->C. Cagle
>->SingTech
>
>Damn straight. Sagan didn't even get NOMINATED for the
>Angstrom Medal. What I want to know is how cheap
>showmen like Sagan are so well known when true
>beacons of light like Velikovsky's are shrouded
>and shunned by the dominantliberalmedia.
>

Certainly thy tongue is firmly planted in thy cheek---I most fervently
hope so.


From [e-mail] Thu Jan 02 17:52:11 1997
Path: news1.epix.net!news3.epix.net!uunet!in3.uu.net!206.66.12.35!news-in.iadfw.net!usenet
From: [e-mail] (Eric Haskell)
Newsgroups: rec.radio.amateur.homebrew
Subject: WTB: HP8444 Trac. Gen. need Output module
Date: Fri, 27 Dec 1996 05:16:16 GMT
Organization: INTERNET AMERICA
Lines: 3
Message-ID: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: fw1-26.ppp.iadfw.net
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Newsreader: Forte Agent .99g/32.339

Please state 8444 price and condition.
Eric Haskell
[e-mail]


From [e-mail] Thu Jan 02 17:52:11 1997
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!newsxfer2.itd.umich.edu!uunet!in2.uu.net!198.147.103.4!rocky.scvnet.com!usenet
From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: homebrew yagi
Date: Thu, 26 Dec 1996 21:48:50 -0800
Organization: SCVNET
Lines: 22
Message-ID: <[e-mail]>
References: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: p187.scvnet.com
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
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To: [e-mail]

David Whipple wrote:
>
> I'm pretty new and electronic-illeterate.  Is there anything wrong with
> using a wooden frame and wires to create a cheap, makeshift yagi?  I
> know you can make quat antennas with the same materials, but I'd be
> interesting in any way of making a _cheap_ 2 meter yagi without needing
> too much expertize.  I've made a simple groundplane with a chasis mount
> and a couple of wire coathangers, and I'd like a yagi equally as cheap.
>
> Any input would be great.
>
> Thanks
>
> David
> KC7MJR

A couple of years back QST had an article called "7dB for 7 bucks" that
outlined how to make a cheap 2m yagi from PVC pipe and brazing rod.  The
antenna worked great and we still have several folks in our club using
them for T-hunting.  Check the article out!

George, N7TNJ


From [e-mail] Thu Jan 02 17:52:13 1997
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!arclight.uoregon.edu!news.bc.net!rover.ucs.ualberta.ca!news.agtac.net!news.oanet.com!usenet
From: Gerald Caouette <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Home brew rotator controller?
Date: Fri, 27 Dec 1996 00:55:25 -0800
Organization: Central News Services
Lines: 29
Message-ID: <[e-mail]>
References: <59rop3$22r$[e-mail]>
NNTP-Posting-Host: dialin122.oanet.com
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 2.01 (Win16; U)
To: Jeff Groberman <[e-mail]>
CC: [e-mail]

Jeff Groberman wrote:
>
> I have acquired a 12 volt antenna rotator - unfortunately no
> controller.  Does anyone have an idea for a circuit that would control
> the rotator.  Reversing polarity is easy, but knowing where the
> rotator is pointing is difficult.  Any ideas?

Jeff

A couple of suggestions

The first is a pair of selsyn units from a surplus dealer


The second and perhaps more fun is a multi turn variable resistor
and a meter used in a bridge type circuit- Junk box and theory put
into practice.


And for the more resourceful a rotary / bianary position encoder
with corresponding interface and computer software - great practice
for the digital boys out there

0h yea the low tech way is look out window

Have a great new year
de
[e-mail]



From [e-mail] Thu Jan 02 17:52:14 1997
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From: [e-mail] (Russ Renaud)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: homebrew yagi
Date: 27 Dec 1996 13:08:43 GMT
Organization: The National Capital FreeNet
Lines: 17
Message-ID: <5a0hor$[e-mail]>
References: <[e-mail]>
Reply-To: [e-mail] (Russ Renaud)
NNTP-Posting-Host: freenet2.carleton.ca
X-Given-Sender: [e-mail] (Russ Renaud)


David Whipple ([e-mail]) writes:
> I'm pretty new and electronic-illeterate.  Is there anything wrong with
> using a wooden frame and wires to create a cheap, makeshift yagi?  I
> know you can make quat antennas with the same materials, but I'd be
> interesting in any way of making a _cheap_ 2 meter yagi without needing
> too much expertize.  I've made a simple groundplane with a chasis mount
> and a couple of wire coathangers, and I'd like a yagi equally as cheap.
>

There's nothing wrong with that approach.  Having said that, if you
look around, I'm sure you will find someone with an old TV antenna
that they are willing to give away.  You should be able to recycle
that into a 3 to 5 element 2 metre yagi.

have fun!
73 de va3rr/aa8lu


From [e-mail] Thu Jan 02 17:52:15 1997
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From: [e-mail] (Ben Blavat)
Newsgroups: rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.amateur.misc
Subject: Re: Wanted: TM-V7A Mod
Date: Fri, 27 Dec 1996 13:57:07 GMT
Organization: Great Think Inc.
Lines: 7
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References: <01bbf2eb$c25fdf80$0a66f0c6@general>
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Likely you'll be the one posting the MOD, as your one of  the few who have
one! <grin>
Why don't you post a reveiw of your new rig, I know everyone is interested!
Good luck with the new iron.
73's from
Benjamin Blavat, [e-mail]
webphone, PGPhone


From [e-mail] Thu Jan 02 17:52:16 1997
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From: barry0!@!fastlink.com.au (Barry O'Grady)
Newsgroups: rec.ham-radio.swap,rec.radio.amateur,rec.radio.amateur.boatanchor,rec.radio.amateur.swap,rec.radio.amateur.homebrew,rec.radio.swap
Subject: Re: FS COMMAND SETS
Date: Fri, 27 Dec 1996 14:05:42 GMT
Organization: Organisation
Lines: 28
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References: <59k1j9$[e-mail]>
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[e-mail] (KB6WKW) wrote:

:This is what I have. All responses welcome.
:I have a command set - R-27/ARC-5. It's got the following six tubes:
:Tube Nr.       Condition
:12SK7           - good
:12SF7           - good
:12V6            - good
:12SQ7           - good
:12SK8           - Unknown*
:12SK7           - Bad**
:
:The cabinet is still intact, but it's missing the lid(?) that goes on
:top over the tube compartment, and there is no dynamotor. The inside is
:clean - no burned parts, etc.  Don't know if it works or not.
:
:The whole thing weighs 7 pounds.I'm asking $45.00 plus shipping and
:handling.

I have two command receivers that are complete except for dynamotor
and are in good working order. If one in unknown condition with a known
faulty tube is worth $45 does that make mine worth $60 each?

One covers 190 to 550 Khz and the other covers 3 to 6 Mhz.

Barry
VK2TLC



From [e-mail] Thu Jan 02 17:52:17 1997
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From: [e-mail] (Spencer Trombly)
Newsgroups: rec.radio.amateur.homebrew
Subject: 8Kw dummy load
Date: 27 Dec 96 15:35:19 GMT
Organization: ucsd usenet gateway
Lines: 9
Message-ID: <Pine.SUN.3.94.961227102705.3060A-100000@polaris>
References: <[e-mail]>
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]

Try some electric base-board heaters. I have some that are 1Kw at 240vac.
They are linear and about 4 feet long, nice big fins to get rid of the
heat. There are actually 2 500 watt elements in each heater wired in
parallel.
73
spencer





From [e-mail] Thu Jan 02 17:52:19 1997
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From: "David B. Holtkamp (K5KH)" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: 27 Dec 1996 15:39:40 GMT
Organization: The Santa Fe Institute
Lines: 37
Message-ID: <01bbf409$e3950da0$[e-mail]>
References: <01bbf1bb$53725200$[e-mail]> <[e-mail]> <01bbf1f0$5bc36e00$[e-mail]> <[e-mail]>
NNTP-Posting-Host: dial131.roadrunner.com
X-Newsreader: Microsoft Internet News 4.70.1155

Sorry to break this into two replies, but I had some other questions:

>  You need a different static drain
> arrangement if you'll be transmitting in conditions where corona can
occur.
> A high value choke shunted to Earth works dandy for draining static.

  Could you elaborate a bit on "high value choke"? I'm guessing you mean to
connect it between the center conductor and a good ground...to drain off
the charge. How would it work if I use the same coax for transmit and
receive? I'm concerned about transmitting into a line with the choke on it.
Might work fine for a seperate receive antenna...but wasn't sure about
shared xmit/recv. What are your thoughts on this one?





> Polyphaser uses a
> much superior design which has a series capacitor in the inner conductor
> path.... If you don't provide a DC shunted load, however,
> the AD and Lynics suppressors work fine.

  Thanks for the info on this issue. I imagine the series capacitor will
work fine on xmit, but are there higher insertion losses on recv from using
this style of suppressor?

  I'm fairly sure my antennas are higher impedance sources (G5RV and log
periodic) so they aren't like a low impedance antenna ( a loop). But what
did you mean by the comment "If you don't provide a DC shunted load..." ?
Was that also in reference to a low impedance antenna configuration? If so,
I'm still in good shape there as well.

  Again, thanks for your info and insights!

  73s de david (K5KH)



From [e-mail] Thu Jan 02 17:52:19 1997
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From: "David B. Holtkamp (K5KH)" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew,sci.electronics.design
Subject: Re: Wanted: Tips for constructing water cooled load
Date: 27 Dec 1996 15:47:27 GMT
Organization: The Santa Fe Institute
Lines: 9
Message-ID: <01bbf40a$fa2faf60$[e-mail]>
References: <[e-mail]>
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> My
> current thinking is to use Carborundum resistors with water cooling.

  Hey, Jim! Invite me over when you get it running and we'll have a
marshmellow roast!

  Best wishes de david (K5KH)


From [e-mail] Thu Jan 02 17:52:20 1997
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From: Jake Brodsky <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: M.E.M.F.T.A.C., info wanted-------MODULATION OF EARTH'S MAG. FIELD-appeared in early '60's QST!!!
Date: Fri, 27 Dec 1996 10:47:29 -0500
Organization: Utter Chaos
Lines: 26
Message-ID: <[e-mail]>
References: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: spg-as46s63.erols.com
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Joe B. Clark wrote:
>
> Does anyone have the old QST (from the early '60's) that describes
> this novel form of communication? A few points I remember---required
> low power, about 50W to reliably communicate several thousand miles,
> free from qrm,etc. Involved unique antenna systems by which you could
> "tune" to a specific magnetic line of force (earth's magnetic field),
> modulate it, and use as a medium for communication.  I have never seen
> m.e.m.f.t.a.c. (modulation of earth's magnetic field to affect
> communication) mentioned again.

I'm not sure if this is the same thing, but I remember having
read that Tesla calculated the earth's resonant frequency (Was
it 7.69 Hz?) and he somehow got the notion that if you excited
the electromagnetic spectrum at this rate, you'd be able to
communicate world wide.

Unfortunately, building a transmitter and a receiver for
this frequency isn't a small affair.  Further, the
communications bandwidth isn't very good.  You weren't reading
one of those famous april fools articles, were you?

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 17:52:21 1997
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From: "Andy" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Converting 49 MHz radios to 6M
Date: 27 Dec 96 16:24:05 GMT
Organization: University of Massachusetts, Amherst
Lines: 24
Message-ID: <01bbf412$7023be80$[e-mail]>
References: <01bbf36c$5ee05bc0$[e-mail]> <59uor9$[e-mail]> <59v1av$[e-mail]> <59v6gh$[e-mail]>
NNTP-Posting-Host: robby.oit.umass.edu
X-Newsreader: Microsoft Internet News 4.70.1155



Kevin Koziol <[e-mail]> wrote in article
<59v6gh$[e-mail]>...
> I think you can get the headset units from Fair Radio. They should have
the batteries too. I
> think these units put out about 100 mW. They are popular with paintball
enthusiasts. If anyone
> get crystals made for the RS units please ask for the specs on the
crystals and post it here.
> It would be easier when ordering crystals for these radios. I like the
sound of the RS units,
> I don't think I would go out in public with a radio helmet! I imagine the
RS units operate at
> a similar power level as the headset, right? Seems like a cheap way to
outfit my wife and I
> with a couple of 6 meter handhelds. 73 KD1NW
>
>
Alright, I think thast I'm going to try this.  I got a $50 gift certificate
to RS for christmas, so I might even get their 5 channel walkie talkie
(expansion for other crystals?)  I'll order the crystals and post the specs
here once I get them.
                Andy, KB0MMU


From [e-mail] Thu Jan 02 17:52:23 1997
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From: [e-mail] (Brian Carling)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: klm multi2700 help
Date: Fri, 27 Dec 1996 16:29:09 GMT
Organization: Glowbugs
Lines: 19
Distribution: inet
Message-ID: <5a1814$[e-mail]>
References: <[e-mail]>
Reply-To: [e-mail]
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WARNING - if you ever DO getting it going, it is a REAL splatter generator
on SSB!

ken cubilo <[e-mail]> whistled a happy tune like:

|>dont know if this is the proper group for this question but here goes
|>does anyone know on a old klm multi2700 2mtr xcvr if there is some
|>sort of rf front end protection hidden somewhere  rx section was zapped
|>by 10 watts tx due to relay failure. have replaced transistors but
|>cant get good performance out of the unit.the if boards are fine
|>i also dont have a schematic so am shooting in the dark any help
|>greatly appreciated
|>73 we8w

73 from Bry  (((Amateur Radio G3XLQ / AF4K)))
http://www.mnsinc.com/bry
E-mail:  [e-mail]
Home of MEGALIST ham radio files, SWL info. etc. etc.



From [e-mail] Thu Jan 02 17:52:23 1997
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From: "Andy" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Converting 49 MHz radios to 6M
Date: 27 Dec 96 16:37:42 GMT
Organization: University of Massachusetts, Amherst
Lines: 5
Message-ID: <01bbf414$5740ac00$[e-mail]>
References: <01bbf36c$5ee05bc0$[e-mail]>
NNTP-Posting-Host: robby.oit.umass.edu
X-Newsreader: Microsoft Internet News 4.70.1155



2 questions, what's the address of Cal Crystals, and, is there a cheaper
crystal supplier (Jan, International, etc.)  Thanks, Andy.



From [e-mail] Thu Jan 02 17:52:24 1997
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From: ballen@204.140.227.4
Newsgroups: alt.radio.scanner,rec.radio.scanner,rec.radio.swap,rec.radio.amateur.homebrew,rec.radio.amateur.equipment,
Subject: Re: RS PRO 26
Date: Fri, 27 Dec 1996 12:00:20 -0700
Organization: Zip News
Lines: 5
Message-ID: <32C41CC4.573F@204.140.227.4>
References: <[e-mail]> <[e-mail]>
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I just received a Pro-26 for a xmas present. Does anyone know any mods
for the cellular lockout????
Bill N6XD




From [e-mail] Thu Jan 02 17:52:26 1997
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From: "Ian White, G3SEK" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: QST View - A Review
Date: Fri, 27 Dec 1996 21:01:46 +0000
Organization: IFW Technical Services
Lines: 70
Distribution: world
Message-ID: <[e-mail]>
References: <[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>

Thanks to L.Mark Pilant for a very useful review.

It seems that the search engine is exactly the same as for the 1995 CD-
ROM which was published last April - with all its strengths and
weaknesses.

A year's issues appear first as a vertical list on the left-hand part of
the screen, rather like a directory list in Windows File Manager. You
can then expand each issue into a number of general areas, and then each
area into individual articles etc - all the way down to the small-ads if
you want. The selected text appears on the right-hand part of the
screen.

When you enter a word or phrase to search for, the number of "hits"
appears next to each month's issue in the vertical list, and in the
right-hand text window is the text begining at your first "hit", which
is highlighted. You can very easily jump along from one highlight to the
next.

It should now be clear to the sender of an earlier message that the
whole text is indexed and fully searchable, and is not simply scanned-in
pages. Only the diagrams are scanned-in, and are accessible by clicking
on the references in the text. If you choose to print a selected
article, all the diagrams and photographs are automatically included,
each on its own  page.

What disappointed me about the 1995 CD-ROM was that it makes no use of
the Classified Index which appears in the December issue. It's there, of
course, but all the index entries are "dead" - you can look but you
can't click to jump directly to an identified article. Worse still, the
Index only gives month and page numbers, and there's no way to jump
directly to a page number. (Mark: is this the same in the new QST sets?)

I agree with Mark about the dialog boxes and other features that are not
fully Windows compliant, and therefore more difficult to use, but
presumably these "misfeatures" are built into the search engine that
ARRL bought as a package. The other annoyance is that the Help system
doesn't work like normal Windows Help - it uses the search engine
itself. Now if you're having trouble using the search engine...
see what I mean?

Mark said:
>If I had it to do all over, would I purchase these CD sets?  Without
>question: Yes.  Will I be buying future sets?  Yes.

Based on experience with the 1995 QST CD-ROM (which also includes QEX
and NCJ), and Mark's review, I will be buying the CD sets.

>Are these for everyone?  No.

Not if you already have the relevant QSTs and the space to store them.
For everyone else they're well worth considering.

One final thought: when reading articles on-screen, and viewing each
diagram in its own separate window, I found something getting in the way
of my understanding. It was easier when the articles were printed out,
becasue then I could flick from page to page and leave bookmarks
(fingers) at the most interesting parts. But printed output from the CD-
ROM is done in word-processor style with long lines across the whole
page, and illustrations on separate pages. That still isn't as easy to
understand as the original QST pages, printed in columns for ease of
reading, and with the relevant illustrations on the same page wherever
possible. It showed very clearly how much the page layout contributes to
ease of understanding - we'll miss it in a few years, when it's gone.


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 17:52:29 1997
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From: [e-mail] (Christopher P. Winter)
Newsgroups: alt.fan.art-bell,alt.sci.physics.relativity,sci.astro,sci.astro.amateur,sci.physics,rec.radio.amateur.homebrew,rec.radio.amateur.antennas
Subject: Re: FAREWELL TO THE "SHIP OF THE MIND", AND TO ITS MASTER, DR. CARL SAGAN
Date: Fri, 27 Dec 1996 22:28:18 GMT
Organization: Netcom
Lines: 2
Message-ID: <5a1ik2$[e-mail]>
References: <5977v4$[e-mail]> <32b78403.9982069@news2> <[e-mail]> <[e-mail]> <[e-mail]> <[e-mail]> <59vkt5$[e-mail]>
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I don't think you need to worry.  <G>



From [e-mail] Thu Jan 02 17:52:30 1997
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From: [e-mail] (Christopher P. Winter)
Newsgroups: alt.fan.art-bell,alt.sci.physics.relativity,sci.astro,sci.astro.amateur,sci.physics,rec.radio.amateur.homebrew,rec.radio.amateur.antennas
Subject: Re: FAREWELL TO THE "SHIP OF THE MIND", AND TO ITS MASTER, DR. CARL SAGAN
Date: Fri, 27 Dec 1996 22:39:07 GMT
Organization: Netcom
Lines: 9
Message-ID: <5a1j8a$[e-mail]>
References: <5977v4$[e-mail]> <32b78403.9982069@news2> <[e-mail]> <[e-mail]> <[e-mail]>
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Ah, the universe itself is life.  Nothing conjectural about that; not
a bit of it.

And thanks for setting us straight about Dr. Sagan.  I guess we were
all deluded by the more than 200 scientific papers, the decades of
productive work on the Pioneer and Voyager missions, and the teaching
at Cornell.




From [e-mail] Thu Jan 02 17:52:31 1997
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From: [e-mail] (Steve McAllister)
Newsgroups: rec.antiques.radio+phono,rec.audio.tubes,rec.radio.amateur.boatanchors,rec.radio.amateur.homebrew
Subject: What are tiny tubes?
Date: Fri, 27 Dec 1996 22:51:30 GMT
Organization: Heller Information Services, Inc.
Lines: 15
Message-ID: <5a1k1c$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: pm6-126.his.com
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I'm fairly new to working with vacuum tube radios.  Recently, I bought
box of tubes to use and there were about 60-70 tiny little tubes --
about 5/16 - 3/8" in diameter and about 1 - 1 1/4" long.  Some had
regular pins coming off of the bottom, but most have insulated wire,
about an inclh long.  Some of the numbers are:  JG-6021, JG-6111,
AF-5840, JG-5896, 5641, JHS-5977, AF-5636, ...

Are these "pencil tubes"?  What were these little guys used for?
Portable electronics?    Do they have any practical use now?

Thanks and happy new year!
Steve





From [e-mail] Thu Jan 02 17:52:32 1997
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From: [e-mail] (P.J. "Josh" Rovero)
Newsgroups: rec.antiques.radio+phono,rec.audio.tubes,rec.radio.amateur.boatanchors,rec.radio.amateur.homebrew
Subject: Re: What are tiny tubes?
Date: 28 Dec 1996 00:39:52 GMT
Organization: Connix - The Connecticut Internet Exchange
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In <5a1k1c$[e-mail]>, [e-mail] (Steve McAllister) writes:
>I'm fairly new to working with vacuum tube radios.  Recently, I bought
>box of tubes to use and there were about 60-70 tiny little tubes --
>about 5/16 - 3/8" in diameter and about 1 - 1 1/4" long.  Some had
>regular pins coming off of the bottom, but most have insulated wire,
>about an inclh long.  Some of the numbers are:  JG-6021, JG-6111,
>AF-5840, JG-5896, 5641, JHS-5977, AF-5636, ...
>
>Are these "pencil tubes"?  What were these little guys used for?
>Portable electronics?    Do they have any practical use now?

These are "sub-miniature" or pencil tubes.  The 5840 and 5636
are used in the RCA SRR-11/12/13 & 13A receivers.  Can't really
help with the others.

P.J. "Josh" Rovero                     email:   [e-mail]
Oceanographer                           work:   [e-mail]
Meteorologist                          radio:   KK1D
Curmudgeon at large                      web:   http://www.connix.com/~provero
/



From [e-mail] Thu Jan 02 17:52:32 1997
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From: [e-mail] (Joel Govostes)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Heath HW101- KEYING PROBLEMS
Date: 28 Dec 1996 02:00:03 GMT
Organization: Cornell University
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Problem solved -- the anti-vox was set too high!  Thanks for the suggestions,
73
N1AEP           Freeville, NY


From [e-mail] Thu Jan 02 17:52:34 1997
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From: Dave Curtis <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: IVEX WinBoard PCB layout - using it? panelizing boards?
Date: Fri, 27 Dec 1996 18:02:15 -0800
Lines: 34
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For about a week I've been doing some PCB layout experiments
using WinBoard from IVEX. (See below for "what is...?")
Anyone else using it?  Has anyone had boards fabbed from
its output?  I'm still at the stage of doing small layouts
and learning my way around.  So far, I've done 5 small
two-layer boards that include copper pours, and also I've
started my own component library and added a few things for
odd-ball footprints.

Now my problem:  I'm trying to make a panel out of the small
boards so that I only pay for plotting and set-up once for
these boards.  But those darn copper pours don't drag, and they
don't cut and paste.  And if I re-enter them, they don't
connect up to the pads that they used to.  Anyone solved
this problem??  Or is there another cheap/free tool that
can be used to make panels out of disjoint Gerber files?

What is WinBoard?  It is a PCB layout package that runs on
Windows.  (I'm using Win95)  Reasonably powerful, though
mildly buggy (anyone who has hung around design automation
software for any length of time will not be surprized at
that... :-/  ...)  Seems like a nice package for the
hobbyist, as you pay for the capacity that you want...
you buy it "by the pin".  A limited capacity version is
available for download at http://www.ivex.com/
This is *not* intended to be a review, a testimonial,
or a flame -- until I've either fabbed some boards
or given up I wouldn't think of writing any of the above.

73, Dave N6NZ  (f.k.a. NG0X)
[e-mail]  or [e-mail]

Not associated with IVEX -- just trying to be a customer.
Not speaking for Intel, either.


From [e-mail] Thu Jan 02 17:52:35 1997
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From: David Crittle <[e-mail]>
Newsgroups: rec.antiques.radio+phono,rec.audio.tubes,rec.radio.amateur.boatanchors,rec.radio.amateur.homebrew
Subject: Re: What are tiny tubes?
Date: Sat, 28 Dec 1996 12:10:47 +1000
Organization: Retrovox
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Steve McAllister wrote:
>
> I'm fairly new to working with vacuum tube radios.  Recently, I bought
> box of tubes to use and there were about 60-70 tiny little tubes --
> about 5/16 - 3/8" in diameter and about 1 - 1 1/4" long.  Some had
> regular pins coming off of the bottom, but most have insulated wire,
> about an inclh long.  Some of the numbers are:  JG-6021, JG-6111,
> AF-5840, JG-5896, 5641, JHS-5977, AF-5636, ...
>
> Are these "pencil tubes"?  What were these little guys used for?
> Portable electronics?    Do they have any practical use now?
>
> Thanks and happy new year!


These tubes are little preamp triodes and pentodes. Sure, they can
still be used, just like their bigger brothers. Not all tube handbooks
have data on them, but it is not impossible to find. Most operate in
convential circuits, but usually with lower maximum ratings compared
to bigger tubes.

The GE ESSENTIAL CHARACTERISTICS book reprinted and sold by Antique
Electronic Supply lists data on these types.


David Crittle

email: [e-mail]


From [e-mail] Thu Jan 02 17:52:37 1997
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From: [e-mail] (Andrew R. Mitz)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Heath HW101- KEYING PROBLEMS
Date: 28 Dec 1996 02:16:42 GMT
Organization: LTJ
Lines: 36
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Joel Govostes ([e-mail]) wrote:
: Hi All.

: I have an HW101 which is giving me some difficulty.  I just recently had
: it overhauled, but find it is acting fishy when it comes to CW keying.

: The rig does fine in "test" mode, and loads up with no problem.  BUT when
: I switch it to CW and try to send, one of the main relays won't hold!

: When I close the key, the transmitter relays kick in, receiver mutes, the
: sidetone comes on, and there is output.  All fine.  BUT if I hold the key
: down, for more than a second or two, the relay kicks back out, the the
: transmit signal is cut off.  I still hear the sidetone, though.

: SO if I wish to hold the key down and transmit for a few seconds, to check
: SWR or whatever, the transmitter will not remain ON past a second or two.
: I just hear the relay kick back off again. This is in the Push-To-Talk or
: VOX mode (doesn't seem to matter which).   I have no similar problems when
: transmitting SSB.

: If I HOLD the key down, for an extended time, the relay will keep kicking
: in and out and the transmit signal will go on and off at about a 1-second
: interval, ad infinitum.

: Could someone *please* give me some suggestions on this?  Why might the
: relay not be "holding?"   I also notice that sometimes the first couple of
: taps on the key will not even put the rig in transmit mode immediately, so
: the tx won't send til I'm in the middle of the second or third letter!

I have seen this problem before in an HW-100.  I would look very
carefully at the VOX circuitry. Also, make sure the 6146's are not
gassy.

--
Andy Mitz   (WA3LTJ)
[e-mail]


From [e-mail] Thu Jan 02 17:52:39 1997
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From: Michael Black <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Converting 49 MHz radios to 6M
Date: Fri, 27 Dec 1996 21:26:16 -0500
Organization: Communications Accessibles Montreal, Quebec Canada
Lines: 29
Message-ID: <[e-mail]>
References: <01bbf36c$5ee05bc0$[e-mail]> <59uor9$[e-mail]> <59v1av$[e-mail]> <59v6gh$[e-mail]> <01bbf412$7023be80$[e-mail]>
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Be careful with those multi-channel 49MHz walkie talkies.  I've not seen
the insides or the schematic for one, but someone posted some information
about them some time back, I think in this newsgroup, saying that they
were synthesized units.  He also indicated that there did not seem to
be a way of modifying them for a new frequency range.  If I remember
correctly, it was some guy in Ontario.  I can't remember his call or
his name, and while he did post here quite a bit back then, I've seen
no sign of him lately.

The single channel units are a different matter, as long as you get
the more expensive ones that use a superhet receiver.  I've not tried it,
but there is nothing in them that prevents them from being moved to
the six meter band.  Two crystals, and some retuning should do it.  Since
they aren't meant to be tuned, you might need to lower the capacitance
across the coils, or change the coils to make them work on six.

       Michael  VE2BVW


On 27 Dec 1996, Andy wrote:

> Alright, I think thast I'm going to try this.  I got a $50 gift certificate
> to RS for christmas, so I might even get their 5 channel walkie talkie
> (expansion for other crystals?)  I'll order the crystals and post the specs
> here once I get them.
>               Andy, KB0MMU
>
>



From [e-mail] Thu Jan 02 17:52:40 1997
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From: Madjid <[e-mail]>
Newsgroups: rec.radio.amateur.misc,rec.radio.amateur.digital.misc,rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.shortwave
Subject: Re: CW Interface
Date: Fri, 27 Dec 1996 21:27:42 -0500
Organization: ORION Microsystems
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References: <[e-mail]>
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Richard M. Corrigan wrote:
>
> I recently heard of a cable that attaches from you Reciever to
> the serial port of a computer which allows CW to be translated
> by your Computer for display on your monitor.  Is this true?
> I thought that a TNC was needed.  If it is true does anyone
> have the pin outs to build such a cable or maybe a source that
> I could contact to obtain one.

Yes it can be done with just one op-amp and a PCB
the size of the RS232 connector. Get Hamcomm (see below)
there is a schematics inside for simple and more complex
interfaces.

http://oak.oakland.edu:8080/pub/hamradio/arrl/bbs/programs/hamcom31.exe

There is also on the Web someone selling some cheap interfaces for
Hamcomm (never tested one but must be a one op-amp solution too)
  http://www.cris.com/~n9zle/hc.html

-------------------
Madjid, VE2GMI - Home Page: http://www.CAM.ORG/~mboukri
NEC4WIN Antenna simulation for Windows


From [e-mail] Thu Jan 02 17:52:41 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Hamfest, Los Angeles?
Date: 28 Dec 1996 02:46:47 GMT
Organization: AOL http://www.aol.com
Lines: 18
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References: <59vjff$[e-mail]>
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In article <59vjff$[e-mail]>, [e-mail] (Michael
Covington) writes:

>
>Is there a hamfest or swap meet in the Los Angeles area on Jan. 12?
>
>I seem to recall some huge thing held at TRW every month, or something...
>what are the dates?
>
>--
>Michael A. Covington
http://www.ai.uga.edu/faculty/covington/
>Artificial Intelligence Ce

No it's tomorrow   Dec. 28.

And the last Sat. of every month  .   Marine and Aviation in El Segundo.
              cheers


From [e-mail] Thu Jan 02 17:52:42 1997
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From: "David Lawson" <[e-mail]>
Newsgroups: rec.antiques.radio+phono,rec.audio.tubes,rec.radio.amateur.boatanchors,rec.radio.amateur.homebrew
Subject: Re: What are tiny tubes?
Date: 28 Dec 1996 03:11:02 GMT
Organization: Digital Designs
Lines: 19
Message-ID: <01bbf46b$cdc8fd80$[e-mail]>
References: <5a1k1c$[e-mail]>
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Steve McAllister <[e-mail]> wrote in article
<5a1k1c$[e-mail]>...
> I'm fairly new to working with vacuum tube radios.  Recently, I bought
> box of tubes to use and there were about 60-70 tiny little tubes --
> about 5/16 - 3/8" in diameter and about 1 - 1 1/4" long.  Some had
> regular pins coming off of the bottom, but most have insulated wire,
> about an inclh long.  Some of the numbers are:  JG-6021, JG-6111,
> AF-5840, JG-5896, 5641, JHS-5977, AF-5636, ...
>
> Are these "pencil tubes"?  What were these little guys used for?
> Portable electronics?    Do they have any practical use now?
>
this style was also used in pairs to make flip-flips and other gates. i
worked on a piece of crypto gear (kw-37) that used LOTS of them. 1.25v
filament and 60v on the plate.
david lawson
wa1ymc


From [e-mail] Thu Jan 02 17:52:43 1997
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From: [e-mail] (WB6HRO)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Hamfest, Los Angeles?
Date: 28 Dec 1996 03:23:01 GMT
Organization: The Loop
Lines: 18
Distribution: world
Message-ID: <5a23ql$[e-mail]>
References: <59vjff$[e-mail]>
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>   [e-mail] (Michael Covington) writes:
>  Is there a hamfest or swap meet in the Los Angeles area on Jan. 12?
>
>  I seem to recall some huge thing held at TRW every month, or something...
>  what are the dates?
>
>  --
>  Michael A. Covington                http://www.ai.uga.edu/faculty/covington
/
>  Artificial Intelligence Center                                           <>
<
>  The University of Georgia               Unless otherwise indicated, I am no
t
>  Athens, GA 30602-7415 U.S.A.         speaking officially for the University
.
>
>>>>
Well the DeVry swap meet is on the third Sat of every month.

While TRW is on the last Sat of the month.

de WB6HRO


From [e-mail] Thu Jan 02 17:52:44 1997
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From: [e-mail] (PDRUNEN)
Newsgroups: rec.radio.amateur.homebrew
Subject: DTMF decoding program and schematic
Date: 28 Dec 1996 04:06:30 GMT
Organization: AOL http://www.aol.com
Lines: 15
Message-ID: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

Hi,

I have written a window's based DTMF decoding program.  The program
requires a DTMF decoding chip (M8870) be connected to the printer port of
the computer.

The schematic diagram is part of the program and is very easy to
construct.  If interested, please email me for a copy of the demo.

The demo decodes all the tones without limit.  It does not save the tone
to a file on the hard drive.

Paul
KJ4UO
[e-mail]


From [e-mail] Thu Jan 02 17:52:44 1997
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From: [e-mail] (Bea and Marvin Jones)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: QST View - A Review
Date: 28 Dec 1996 04:21:05 GMT
Organization: Rocky Mountain Internet - (800) 900-RMII
Lines: 19
Distribution: world
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Ian White, G3SEK ([e-mail]) wrote:
: Thanks to L.Mark Pilant for a very useful review.

<-Big Snip->

: It showed very clearly how much the page layout contributes to
: ease of understanding - we'll miss it in a few years, when it's gone.

Ya, right....  :-)  <rotfl>>>>>>>>>>>>


73 es Happy New Year
Jonesy W3DHJ
__
SK

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


From [e-mail] Thu Jan 02 17:52:46 1997
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From: "D. Douglas Smith" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: FS Drake Radio Equipment
Date: Fri, 27 Dec 1996 20:41:53 -0800
Organization: scescape internet
Lines: 19
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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 17:52:48 1997
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From: "glenn schultz" <[e-mail]>
Newsgroups: alt.radio.scanner,rec.radio.scanner,rec.radio.swap,rec.radio.amateur.homebrew,rec.radio.amateur.equipment
Subject: Re: RS PRO 26
Date: 28 Dec 1996 04:49:32 GMT
Organization: Spacestar Communications, Minneapolis, MN, USA
Lines: 26
Message-ID: <01bbf46f$c70102a0$[e-mail]>
References: <[e-mail]>
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I've bought 3 scanners from Pawnshops and have always gotten good prices
and good products. They take them only if they work properly, because they
don't want to lose their collateral if the units don't work. Also, most
people that pawn their equipment don't intend to lose their items, but just
don't have the money to get it back. I'm on very friendly terms with three
pawnshops in my area, and they will let me know if they have something I
might be interested in. One even has ham gear once in a while. If it were
me, I would grab that scanner before someone else does!
--
Glenn Schultz
10X 68391
N0VYK

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Check out the Ionospheric Protection League
Amateur and Antique Radio Homepage
==>>   http://www.spacestar.net/users/glenn/index.html

[e-mail] wrote in article <[e-mail]>...
> I posted a few days ago saying I could get hold of a RS PRO-26 for $200
> from a PAWN shop.  It sells for around $450 from RS.  I believe this is
> a good price even though I would only get a 30 day warrenty.  No one
> responded What do you think about the deal?
>


From [e-mail] Thu Jan 02 17:52:49 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
From: "J Mullins" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Telecommunications Act of 1996
Date: 28 Dec 1996 05:10:40 GMT
Organization: Erol's Internet Services
Lines: 31
Message-ID: <01bbf47d$243282c0$[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 17:52:50 1997
Newsgroups: rec.radio.amateur.homebrew
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!eskimo!news
From: [e-mail] (Bill Turner)
Subject: Re: 8Kw dummy load
X-Nntp-Posting-Host: wrt.ndip.eskimo.net
Content-Type: text/plain; charset=us-ascii
Message-ID: <[e-mail]>
Sender: [e-mail] (News User Id)
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Organization: Eskimo North (206) For-Ever
X-Newsreader: Forte Agent .99f/16.299
References: <[e-mail]> <Pine.SUN.3.94.961227102705.3060A-100000@polaris>
Mime-Version: 1.0
Date: Sat, 28 Dec 1996 05:12:53 GMT
Lines: 16

[e-mail] (Spencer Trombly) wrote:

>Try some electric base-board heaters. I have some that are 1Kw at 240vac.
>They are linear and about 4 feet long, nice big fins to get rid of the
>heat. There are actually 2 500 watt elements in each heater wired in
>parallel.
>73
>spencer
--------------------------------------------------
If you use the heaters as-is, you'll have a problem with their inductive
reactance - small but easily avoidable.  Place a variable capacitor in series
with them and tune for minimum SWR.  I've used this with light bulbs and other
odd loads and it works like a charm.

73, Bill W7TI
[e-mail]


From [e-mail] Thu Jan 02 17:52:51 1997
Newsgroups: rec.antiques.radio+phono,rec.audio.tubes,rec.radio.amateur.boatanchors,rec.radio.amateur.homebrew
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!wa2ise
From: [e-mail] (Robert Casey)
Subject: Re: What are tiny tubes?
Message-ID: <[e-mail]>
Organization: Netcom Online Communications Services (408-241-9760 login: guest)
References: <5a1k1c$[e-mail]>
Date: Sat, 28 Dec 1996 05:44:58 GMT
Lines: 24
Sender: [e-mail]
Xref: news1.epix.net rec.antiques.radio+phono:34274 rec.audio.tubes:20311 rec.radio.amateur.boatanchors:1313 rec.radio.amateur.homebrew:22509

In article <5a1k1c$[e-mail]> [e-mail] writes:
>I'm fairly new to working with vacuum tube radios.  Recently, I bought
>box of tubes to use and there were about 60-70 tiny little tubes --
>about 5/16 - 3/8" in diameter and about 1 - 1 1/4" long.  Some had
>regular pins coming off of the bottom, but most have insulated wire,
>about an inclh long.  Some of the numbers are:  JG-6021, JG-6111,
>AF-5840, JG-5896, 5641, JHS-5977, AF-5636, ...
>
>Are these "pencil tubes"?  What were these little guys used for?
>Portable electronics?    Do they have any practical use now?
>
>Thanks and happy new year!
>Steve

Those are "sub-miniature" tubes.  Mostly used in military radios
in the late 50's early 60's.  Look at my web page:

http://www.netcom.com/~wa2ise/radios/penciltubes.html

for info on the ones you mentioned above, and likely others you
have.

If you don't need them, I would be interested in them.  my e-mail
is:  [e-mail]


From [e-mail] Thu Jan 02 17:52:52 1997
Path: news1.epix.net!news3.epix.net!uunet!in2.uu.net!169.132.11.200!news.idt.net!www.nntp.primenet.com!nntp.primenet.com!nntp.uio.no!in1.nntp.cais.net!news2.cais.com!news
From: Mark Weaver <[e-mail]>
Newsgroups: rec.antiques.radio+phono,rec.audio.tubes,rec.radio.amateur.boatanchors,rec.radio.amateur.homebrew
Subject: Re: What are tiny tubes?
Date: Fri, 27 Dec 1996 21:47:10 -0800
Organization: Posted via CAIS Internet <[e-mail]>
Lines: 23
Message-ID: <[e-mail]>
References: <5a1k1c$[e-mail]>
Reply-To: [e-mail]
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Xref: news1.epix.net rec.antiques.radio+phono:34539 rec.audio.tubes:20490 rec.radio.amateur.boatanchors:1411 rec.radio.amateur.homebrew:22621

Steve McAllister wrote:
>
> I'm fairly new to working with vacuum tube radios.  Recently, I bought
> box of tubes to use and there were about 60-70 tiny little tubes --
> about 5/16 - 3/8" in diameter and about 1 - 1 1/4" long.  Some had
> regular pins coming off of the bottom, but most have insulated wire,
> about an inclh long.  Some of the numbers are:  JG-6021, JG-6111,
> AF-5840, JG-5896, 5641, JHS-5977, AF-5636, ...
>
> Are these "pencil tubes"?  What were these little guys used for?
> Portable electronics?    Do they have any practical use now?
>
> Thanks and happy new year!
> Steve

Yes they're called Pencil Tubes and they were used in portable
electronics.  They have no practical use now that I have been able to
find.  I had a bunch of them and some of them are quite expensive retail
but no one will buy them. I tried for months and never got anyone
interested so I dumped them at a ham fest in a package deal with a bunch
of other tubes that are not in demand.

Mark


From [e-mail] Thu Jan 02 17:52:53 1997
Newsgroups: alt.fan.art-bell,alt.sci.physics.relativity,sci.astro,sci.physics,rec.radio.amateur.homebrew
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!cliffs.rs.itd.umich.edu!howland.erols.net!portc02.blue.aol.com!news.bbnplanet.com!cpk-news-hub1.bbnplanet.com!news.mindspring.com!cssun.mathcs.emory.edu!news.radio.org!wa4mei!ke4zv!gary
From: [e-mail] (Gary Coffman)
Subject: Re: FAREWELL TO THE "SHIP OF THE MIND", AND TO ITS MASTER, DR. CARL SAGAN
Message-ID: <[e-mail]>
Reply-To: [e-mail] (Gary Coffman)
Organization: Destructive Testing Systems
References: <[e-mail]> <[e-mail]>
Date: Sat, 28 Dec 1996 05:57:09 GMT
Lines: 47
Xref: news1.epix.net alt.fan.art-bell:31675 sci.astro:152138 sci.physics:232346 rec.radio.amateur.homebrew:22514

In article <[e-mail]> Tim Gillespie <[e-mail]>
writes:
>Charles Cagle wrote:
>> He promoted as facts things, that at best, were conjecture.
>
>This is another pitiful jab. I suggest, Mr. Cagle, that you actually
>READ some of Sagan's material. When you do, you will see that Dr. Sagan
>NEVER stated ANYTIHNG as fact that was not widely known to be fact.
>Anything that was speculative was clearly stated as such.

Although I had a general respect for Dr. Sagan, and mourn his passing,
I must say your defense is a bit too vigorous. Dr. Sagan pulled several
boners in his published works. We can't really hold his now infamous
nuclear winter theory against him, though in retrospect it is obvious
where he went wrong. At the time there wasn't any hard data to show
his aerosol dwell time assumptions were off by orders of magnitude.
He based his assumptions on the behavior of Martian dust storms and
naively applied them to Earth's atmosphere. It took the Kuwaiti oil
fires to demonstrate the fallacy of that. The presence of water vapor
in Earth's atmosphere, but virtually absent in the Martian atmosphere,
makes the difference, causing the aerosols to quickly rain out. But he
pulled a real howler in The Dragons of Eden when he calculated that
the information rate of the human visual system tops out at 5,000 bps.

He based that on the assumption that the human visual system can only
handle a 2500 pixel area of 20 bit color depth once every 10 seconds.
Anyone at all familiar with television or movies would instantly know
that's absurd. In a 10 second commercial, the eye has to process 92
million pixels at an equivalent color depth of 24 bits. And advertisers
pay big money for high quality productions because the eye *can* do that.
If Dr. Sagan were right, advertisers could save big money by using cheapy
VHS equipment to produce their 10 second ads. In fact if he were right,
a 10 second ad would have no impact at all since he claimed it takes
that long just to absorb a 2500 pixel segment of one frame.

The now outlawed practice of subliminal advertising demonstated
that the eye can process a 307,000 pixel image of 24 bit color
depth in 1/30th of a second to the extent of influencing purchasing
decisions. That's a data rate of 220.8 Mbit/sec. And that one fact,
known since at least the 1950s, blows his entire chapter two thesis
on the nature of memory storage in the brain into a cocked hat.

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] Thu Jan 02 17:52:56 1997
Newsgroups: rec.radio.amateur.homebrew
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-peer.gsl.net!news.gsl.net!uwm.edu!news.he.net!metro.atlanta.com!news.radio.org!wa4mei!ke4zv!gary
From: [e-mail] (Gary Coffman)
Subject: Re: Good source for amplifier tips
Message-ID: <[e-mail]>
Reply-To: [e-mail] (Gary Coffman)
Organization: Destructive Testing Systems
References: <01bbf1bb$53725200$[e-mail]> <[e-mail]> <01bbf1f0$5bc36e00$[e-mail]> <[e-mail]> <01bbf409$e3950da0$[e-mail]>
Date: Sat, 28 Dec 1996 06:07:42 GMT
Lines: 52

In article <01bbf409$e3950da0$[e-mail]> "David B. Holt
kamp (K5KH)" <[e-mail]> writes:
>Sorry to break this into two replies, but I had some other questions:
>>  You need a different static drain
>> arrangement if you'll be transmitting in conditions where corona can
>occur.
>> A high value choke shunted to Earth works dandy for draining static.
>
>  Could you elaborate a bit on "high value choke"? I'm guessing you mean to
>connect it between the center conductor and a good ground...to drain off
>the charge. How would it work if I use the same coax for transmit and
>receive? I'm concerned about transmitting into a line with the choke on it.
>Might work fine for a seperate receive antenna...but wasn't sure about
>shared xmit/recv. What are your thoughts on this one?

A choke of several millihenries, or a high value resistor, either of
which have a high impedance at HF compared to the 50 ohm line they
are shunting, will drain static, a DC phenomenon, while being virtually
invisible to the RF system. The choke, or resistor, should have no
effect on transmission or reception.

>> Polyphaser uses a
>> much superior design which has a series capacitor in the inner conductor
>> path.... If you don't provide a DC shunted load, however,
>> the AD and Lynics suppressors work fine.
>
>  Thanks for the info on this issue. I imagine the series capacitor will
>work fine on xmit, but are there higher insertion losses on recv from using
>this style of suppressor?

No. The value of the capacitor is sufficient to present a negligible
impedance to HF RF. If this weren't so, it would affect transmit.
Most HF receivers are voltage driven, not power driven, and aren't
fussy about the match presented to them.

>  I'm fairly sure my antennas are higher impedance sources (G5RV and log
>periodic) so they aren't like a low impedance antenna ( a loop). But what
>did you mean by the comment "If you don't provide a DC shunted load..." ?
>Was that also in reference to a low impedance antenna configuration? If so,
>I'm still in good shape there as well.

On receive, the *receiver* is the load presented to the line, not the
antenna. I was talking specifically about cavity resonators where the
input loop is DC shorted. However, some receivers use a shunt coil
in their inputs, and that would have a similar, though not so pronounced,
effect.

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] Thu Jan 02 17:52:59 1997
Newsgroups: rec.radio.amateur.homebrew
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!howland.erols.net!cliffs.rs.itd.umich.edu!newsxfer2.itd.umich.edu!uunet!in1.uu.net!155.229.2.176!metro.atlanta.com!news.radio.org!wa4mei!ke4zv!gary
From: [e-mail] (Gary Coffman)
Subject: Re: homebrew yagi
Message-ID: <[e-mail]>
Reply-To: [e-mail] (Gary Coffman)
Organization: Destructive Testing Systems
References: <[e-mail]>
Date: Sat, 28 Dec 1996 06:19:16 GMT
Lines: 26

In article <[e-mail]> [e-mail] writes:
>
>I'm pretty new and electronic-illeterate.  Is there anything wrong with
>using a wooden frame and wires to create a cheap, makeshift yagi?  I
>know you can make quat antennas with the same materials, but I'd be
>interesting in any way of making a _cheap_ 2 meter yagi without needing
>too much expertize.  I've made a simple groundplane with a chasis mount
>and a couple of wire coathangers, and I'd like a yagi equally as cheap.

Sure. You can make a yagi from a length of 2x2 and some aluminum
clothesline wire. The wire is stiff enough to form elements. Just
drill the 2x2 and insert the wires where you want elements. You
can use PVC pipe as a boom too, but spar varnished wood 2x2 lasts
better in the sunlight than PVC. It's cheaper and easier to work
with too. Any of the yagi design programs floating around the
net will give you the dimensions and spacings for the elements.
Note that spacings will be different for a non-conductive boom
than for a metal boom. Make sure the program knows how to handle
this.

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] Thu Jan 02 17:53:00 1997
Newsgroups: rec.radio.amateur.homebrew
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!howland.erols.net!cliffs.rs.itd.umich.edu!newsxfer2.itd.umich.edu!uunet!in2.uu.net!155.229.2.176!metro.atlanta.com!news.radio.org!wa4mei!ke4zv!gary
From: [e-mail] (Gary Coffman)
Subject: Re: Technican information wanted on ICOM  IC-BP3 batery pack
Message-ID: <[e-mail]>
Reply-To: [e-mail] (Gary Coffman)
Organization: Destructive Testing Systems
References: <01bbeeaf$8b7049a0$LocalHost@206.48.181.1.206.48.177.1>
Date: Sat, 28 Dec 1996 06:24:29 GMT
Lines: 22

In article <01bbeeaf$8b7049a0$LocalHost@206.48.181.1.206.48.177.1> "Geert Pire
ns" <[e-mail]> writes:
>Can someone tell me more of the ICOM IC-BP3 battery pack?
>
>I only know that I can charge this pack with 13.8 volt, but haw long must I
>charge this pack ?
>
>And what for charger do I need charge this type battery pack? 13.8 v / ?mA
>????????

The BP3 is *not* a rapid charge pack. You must use a *constant current*
source and set the current for 40 mA. A 3 terminal regulator can be
configured to act as a constant current source. The voltage used is
unimportant as long as it is high enough to allow the regulator to
maintain a 40 mA charging rate into the battery. Charge for 14 hours
to fully recharge the depleted pack.

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] Thu Jan 02 17:53:01 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!news.bbnplanet.com!su-news-hub1.bbnplanet.com!news.pbi.net!news.PBI.net!news.westworld.com!207.104.240.192
From: Jay123a <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Hamfest, Los Angeles?
Date: Fri, 27 Dec 1996 22:55:10 -0800
Organization: http://www.ptw.com
Lines: 16
Message-ID: <[e-mail]>
References: <59vjff$[e-mail]>
NNTP-Posting-Host: mothra.westworld.com
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.01 (Win16; I)
To: Michael Covington <[e-mail]>

Michael Covington wrote:
>
> Is there a hamfest or swap meet in the Los Angeles area on Jan. 12?
>
> I seem to recall some huge thing held at TRW every month, or something...
> what are the dates?
>
> --
> Michael A. Covington                http://www.ai.uga.edu/faculty/covington/
> Artificial Intelligence Center                                           <><
> The University of Georgia               Unless otherwise indicated, I am not
> Athens, GA 30602-7415 U.S.A.         speaking officially for the University.

Hello Michael: The TRW swap meet is every last saturday of the month.
Tomorrow!
Jay  at  [e-mail]


From [e-mail] Thu Jan 02 17:53:02 1997
Path: news1.epix.net!news3.epix.net!uunet!in3.uu.net!204.238.120.21!jump.net!news-relay.us.dell.com!natinst.com!HOPPER.acm.ORG!ACM.ORG!MULLIGAN
From: [e-mail] (F. Barry Mulligan)
Newsgroups: rec.radio,rec.radio.amateur.homebrew,rec.radio.amateur.misc,rec.radio.cb,rec.radio.scanner
Subject: Re: PL Codes??
Date: 28 Dec 1996 08:43:27 GMT
Organization: ACM Network Services
Lines: 34
Message-ID: <5a2mjf$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: pascal.acm.org
Xref: news1.epix.net rec.radio.amateur.homebrew:22572 rec.radio.amateur.misc:122175 rec.radio.cb:40228 rec.radio.scanner:74504

    The following list will be included in the Jan '97 release of the FAF.
Any comments or corrections would be greatly appreciated. (The FAF lists
specific U.S. frequencies and channels in various bands of interest to
scanner listeners.)


From the  FAF - Frequently Asked Frequencies
      on  ftp://oak.oakland.edu
      as  /pub/hamradio/docs/misc/scanner.faf


CTCSS (PL) Frequencies

    Freq    Designator     Freq    Designator     Freq    Designator
    (Hz)     EIA  Ham      (Hz)     EIA  Ham      (Hz)     EIA  Ham

     67.0    L1   01       110.9    2Z   15       179.9    6B   29
     71.9    L2   02       114.8    2A   16       186.2    7Z   30
     74.4    WA   03       118.8    2B   17       192.8    7A   31
     77.0    L3   04       123.0    3Z   18       203.5    M1   32
     79.7    SP   05       127.3    3A   19       206.5    8Z
     82.5    L4   06       131.8    3B   20       210.7    M2   33
     85.4    YA   07       136.5    4Z   21       218.1    M3   34
     88.5    L4A  08       141.3    4A   22       225.7    M4   35
     91.5    ZZ   09       146.2    4B   23       229.1    9Z
     94.8    L5   10       151.4    5Z   24       233.6    M5   36
     97.4    ZB   11       156.7    5A   25       241.8    M6   37
    100.0    1Z   12       162.2    5B   26       250.3    M7   38
    103.5    1A   13       167.9    6Z   27       254.1    OZ
    107.2    1B   14       173.8    6A   28

        Motorola differs from EIA with:  XZ (L1), XA (L2), XB (L3),
    YZ (L4), YB (L4A), ZA (L5). ICOMM does not use 97.4 and uses one
    less than the amateur numbers above that (i.e. ICOM #25 = 162.2).


From [e-mail] Thu Jan 02 17:53:04 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!news.bbnplanet.com!su-news-hub1.bbnplanet.com!newsfeed.internetmci.com!news.io.com!usenet
From: Pin 2 Hot <pinksnd@**io.com>
Newsgroups: rec.radio.amateur.homebrew,sci.electronics.design
Subject: Re: Wanted: Tips for constructing water cooled load
Date: Sat, 28 Dec 1996 02:52:34 -0600
Organization: Pink Sound & Lighting
Lines: 71
Message-ID: <5a2mss$[e-mail]>
References: <[e-mail]> <59e1vd$[e-mail]> <[e-mail]> <[e-mail]> <59v8u8$[e-mail]>
Reply-To: pinksnd@**io.com
NNTP-Posting-Host: dialup-01-014.austin.io.com
Mime-Version: 1.0
Content-Type: text/plain; charset=iso-8859-1
Content-Transfer-Encoding: 8bit
X-Mailer: Mozilla 3.0 (Win95; I)
Xref: news1.epix.net rec.radio.amateur.homebrew:22518 sci.electronics.design:28845

Jeff Lutes wrote:
>
> Try this one...have seen one built for a MUCH larger load...but should still
> work:
>
>         Powder the following components:
>                 Copper
>                 non-conductive plastic
>                 graphite
>
> Mix them (play with the ratios to get the correct value) and pack them into
a
> piece of PVC pipe.  Place a copper conductor through the end caps and seal t
he
> end caps on the pipe.  (i.e. build a resistor from HELL).

ò Other than an obnoxious negative temperature coeficent (from the
enclosed mixture building up pressure, and acting like a carbon granule
microphone
from an old telephone), how you gonna dissipate ~27000 or so BTU/Hr
through
1 or 2 sq. ft. of PVC plastic ╝" thick? We're talking enough heat to
bring 5
gallons of water from room temperature to boiling in about 12 minutes
(if
I did the math right). And oil heats even faster, due to lower specific
heat.
How long do you need to dissipate this power for?

> The one I saw was actually in a 5-gallon bucket full of oil for cooling.

ò You can expect to see gobs of rehardened PVC floating on the surface
of that 5 gallon bucket. Yes, they'll float, from all the trapped
bubbles
of clorine gas liberated in the fire.  :)

However, if you pack it into some sort of long ceramic pipe, it might
work.

> In article <[e-mail]>, Gary Ta
it
> <[e-mail]> wrote:
> >On Sat, 21 Dec 1996, Mark Robinson wrote:

> >#> : I am wanting to build a non-inductive 8 kW load for 300 kHz, CW.  The
> >#
> >#Given the low frequency, what about a few toaster elements, or 1kW
> >#linear quartz halogen flood lamp bulbs (adjust impedance by adjusting
> >#drive :)

> >No, toaster elements ,and lightbulbs are inductive as well, and no
> >good as an RF load.
> >
> >Gary Tait , VE3VBF

ò How about some fairly thick bare nichrome wire supported from some
ceramic
structure, hanging down in a zig-zag pattern, in an oil-filled 55 gallon
drum? If you zig-zag carefully, you can keep the inductance down quite
low,
where it might be acceptable at 300Khz, depending on your needs.
Besides,
the capacitance of a grounded metal drum just might balance it out. :)

Also, IMHO, at 2Kv, water is not a safe option due to the shock hazard.



My 2ó
--
Gene

When replying by e-mail, please remove the asterisks from my e-mail
address, they are there in an attempt to thwart the automailers.


From [e-mail] Thu Jan 02 17:53:06 1997
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From: Jim Cross <[e-mail]>
Newsgroups: rec.antiques.radio+phono,rec.audio.tubes,rec.radio.amateur.boatanchors,rec.radio.amateur.homebrew
Subject: Re: What are tiny tubes?
Date: Sat, 28 Dec 1996 05:19:24 -0400
Organization: Vacuum Tubes Unlimited
Lines: 23
Message-ID: <[e-mail]>
References: <5a1k1c$[e-mail]> <5a1q8o$[e-mail]>
Reply-To: [e-mail]
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P.J. Josh Rovero wrote:
>
> In <5a1k1c$[e-mail]>, [e-mail] (Steve McAllister) writes
:
> >I'm fairly new to working with vacuum tube radios.  Recently, I bought
> >box of tubes to use and there were about 60-70 tiny little tubes --
> >about 5/16 - 3/8" in diameter and about 1 - 1 1/4" long.  Some had
> >regular pins coming off of the bottom, but most have insulated wire,
> >about an inclh long.  Some of the numbers are:  JG-6021, JG-6111,
> >AF-5840, JG-5896, 5641, JHS-5977, AF-5636, ...
> >
> >Are these "pencil tubes"?  What were these little guys used for?
> >Portable electronics?    Do they have any practical use now?
>
> These are "sub-miniature" or pencil tubes.  The 5840 and 5636
> are used in the RCA SRR-11/12/13 & 13A receivers.  Can't really
> help with the others.

Technically, these should be referred to as subminiatures and not
"pencil tubes". The term "pencil tube" is usually applied to a series of
UHF tubes developed by RCA which are not necessarily small, but are tall
and thin. Types include 5675, 5794, 5876, 5893, 6263, and 6562.

Jim Cross - [e-mail]


From [e-mail] Thu Jan 02 17:53:07 1997
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From: [e-mail] (Antonio Pajuelo)
Newsgroups: rec.radio.amateur.homebrew
Subject: Subscribe
Date: 28 Dec 96 12:35:06 GMT
Organization: ucsd usenet gateway
Lines: 2
Message-ID: <[e-mail]>
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]

add ham-homebrew



From [e-mail] Thu Jan 02 17:53:08 1997
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From: "Rene Jansen" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: mods Kenwood TS850S
Date: 28 Dec 1996 12:47:16 GMT
Organization: Flevonet
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X-Newsreader: Microsoft Internet News 4.70.1155

Who can tell me were to find
some mods for my TS 850S
on the www

'73 Rene [e-mail]


From [e-mail] Thu Jan 02 17:53:09 1997
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From: [e-mail] (R. L. Measures )
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: Sat, 28 Dec 1996 05:10:04 -0800
Organization: Internet Access of Ventura County
Lines: 32
Message-ID: <[e-mail]>
References: <01bbf1bb$53725200$[e-mail]> <[e-mail]> <01bbf1f0$5bc36e00$[e-mail]> <[e-mail]> <01bbf409$e3950da0$[e-mail]> <[e-mail]>
NNTP-Posting-Host: port28.vcnet.com

In article <[e-mail]>, [e-mail]
(Gary Coffman) wrote:

> In article <01bbf409$e3950da0$[e-mail]> "David
B. Holtkamp (K5KH)" <[e-mail]> writes:
> >Sorry to break this into two replies, but I had some other questions:
> >>  You need a different static drain
> >> arrangement if you'll be transmitting in conditions where corona can
> >occur.
> >> A high value choke shunted to Earth works dandy for draining static.
> >
> >  Could you elaborate a bit on "high value choke"? I'm guessing you mean to
> >connect it between the center conductor and a good ground...to drain off
> >the charge. How would it work if I use the same coax for transmit and
> >receive? I'm concerned about transmitting into a line with the choke on it.
> >Might work fine for a seperate receive antenna...but wasn't sure about
> >shared xmit/recv. What are your thoughts on this one?
>
> A choke of several millihenries, or a high value resistor, either of
> which have a high impedance at HF compared to the 50 ohm line they
> are shunting, will drain static, a DC phenomenon, while being virtually
> invisible to the RF system. The choke, or resistor, should have no
> effect on transmission or reception.
>
I use a resistor to bleed the charge on my 70 foot vertical.  Before I
added the bleeder resistor, during windy weather, the charge on the
vertical would arc over  a 3500v air variable tuning capacitor about every
half minute.  I prefer resistors to chokes because chokes have internal
self resonances and resistors don't.

--
--Rich-- ag6k, 805-386-3734


From [e-mail] Thu Jan 02 17:53:11 1997
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From: [e-mail] (Roy Lewallen)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: RC vs LC
Date: Sat, 28 Dec 96 14:22:42 GMT
Organization: EZNEC Antenna Software
Lines: 17
Message-ID: <5a3afn$1p5$[e-mail]>
References: <59r8ec$[e-mail]>
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X-Newsreader: News Xpress Version 1.0 Beta #3

In article <59r8ec$[e-mail]>,
   [e-mail] (Michael Horowitz) wrote:
>Folks -
>
>   I read where LC combonations make up resonate circuits and filters,
>and I see formula for their calculations. I also see RC circuits
>performing as filters, just as the LC circuits do.
>
>   Does anyone know the formula used to calculate the cutoff frequency
>of a given combination of R and C?
>
>   Thanks in advance - Mike
>
Cutoff frequency (-3 dB) for a single RC section is 1/(2*pi*R*C), where the
frequency is in hertz, C in farads, R in ohms.

Roy Lewallen, W7EL


From [e-mail] Thu Jan 02 17:53:13 1997
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From: [e-mail] (R. L. Measures )
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: Sat, 28 Dec 1996 07:57:39 -0800
Organization: Internet Access of Ventura County
Lines: 25
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
NNTP-Posting-Host: port52.vcnet.com

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

> In article <[e-mail]>,
> [e-mail] (R. L. Measures ) writes:
>
> > Such damage can not be
> >satisfactorily explained by a simple HF switching transient.  I believe
> >its like Murphy said:  "Everything is more complicated than it looks"...
> >IMO, current transients can cause intermittent VHF parasitic
> >oscillations.
>
> In the past you claimed there was only ONE cause of PA problems for
> everything from boiling gold to melting glass, and acing tubes to sparking
> capacitors, PARASITICS. Even though we now suddenly hear a Murphy quote
> saying everything is more complicated than it looks, the answer is
> still.....PARASITICS.
>
> The new claim is:  The HF risetime of 1/2 uS or faster is too slow to
> induce parasitics, but relay switching or bias rise time is not.
>
Does anyone have a clue as to who allegedly made these new claims?

--
--Rich-- ag6k, 805-386-3734


From [e-mail] Thu Jan 02 17:53:14 1997
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From: Ron Myers <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: homebrew yagi
Date: Sat, 28 Dec 1996 11:40:26 -0500
Organization: Info Avenue INTERNET Access
Lines: 32
Message-ID: <[e-mail]>
References: <[e-mail]> <5a0hor$[e-mail]>
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Russ Renaud wrote:
>
> David Whipple ([e-mail]) writes:
> > I'm pretty new and electronic-illeterate.  Is there anything wrong with
> > using a wooden frame and wires to create a cheap, makeshift yagi?  I
> > know you can make quat antennas with the same materials, but I'd be
> > interesting in any way of making a _cheap_ 2 meter yagi without needing
> > too much expertize.  I've made a simple groundplane with a chasis mount
> > and a couple of wire coathangers, and I'd like a yagi equally as cheap.
> >
>
> There's nothing wrong with that approach.  Having said that, if you
> look around, I'm sure you will find someone with an old TV antenna
> that they are willing to give away.  You should be able to recycle
> that into a 3 to 5 element 2 metre yagi.
>
> have fun!
> 73 de va3rr/aa8lu
Be advised, when creating a yagi antenna with wire on a wooden frame:
        even tho it is a valid approach, the bandwidth of the antenna is
        directly affected by the diameter of the wire used.
It is better to use tubing, and I have made several using tips from the
antenna book (ARRL) and old Television antennae Low channels yield
longer source stock, and aluminum conduit for the boom (don't go over
5-6 elements or it becomes unwieldy) and long self-tapping screws to
hold the elements to the boom.
for the gamma match:  I used a piece of stripped coax inserted into the
end of the gamma element for the series capacitor, and slid the tube
back and forth to tune it.
I had good results until Hurricaine Hugo remodeled my farm ... now
nothing.
73's Ron ... KB4EG


From [e-mail] Thu Jan 02 17:53:16 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!arclight.uoregon.edu!feed1.news.erols.com!news.dra.com!news.he.net!newshub.internex.net!masters0.news.internex.net!usenet
From: "Ron Curry" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: PC Repeater Software
Date: 28 Dec 1996 16:47:00 GMT
Organization: Insight Technology
Lines: 8
Message-ID: <01bbf4de$92fea6a0$[e-mail]>
NNTP-Posting-Host: 205.158.161.58
X-Newsreader: Microsoft Internet News 4.70.1155

Anyone written any software to make a PC into a repeater controller?


--
Ron Curry
KE6WED
[e-mail]
[e-mail]


From [e-mail] Thu Jan 02 17:53:17 1997
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From: Andy Zorca <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Auctions on Ham and Electronic Parts & Commercial SUrplus
Date: Sat, 28 Dec 1996 09:00:45 -0800
Organization: CampusMCI
Lines: 5
Message-ID: <[e-mail]>
Reply-To: [e-mail]
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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 17:53:18 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: 28 Dec 1996 17:38:51 GMT
Organization: AOL http://www.aol.com
Lines: 53
Message-ID: <[e-mail]>
References: <01bbf409$e3950da0$[e-mail]>
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X-Admin: [e-mail]
X-Newsreader: AOL Offline Reader

Hi Dave and Gary,

In article <[e-mail]>, [e-mail]
(Gary Coffman) writes:

>A choke of several millihenries, or a high value resistor, either of
>which have a high impedance at HF compared to the 50 ohm line they
>are shunting, will drain static, a DC phenomenon, while being virtually
>invisible to the RF system. The choke, or resistor, should have no
>effect on transmission or reception.

A several millihenry choke may not have a high impedance at HF. It likely
will have series resonances that render it useless as a choke on some HF
frequencies. A 100 microhenry choke would be more than enough impedance,
about 1000 ohms on 160, and much less prone to unwanted resonances. Use a
choke of 50 to 100 microhenries.

>>  Thanks for the info on this issue. I imagine the series capacitor will
>>work fine on xmit, but are there higher insertion losses on recv from
using
>>this style of suppressor?
>
>No. The value of the capacitor is sufficient to present a negligible
>impedance to HF RF. If this weren't so, it would affect transmit.
>Most HF receivers are voltage driven, not power driven, and aren't
>fussy about the match presented to them.

Most HF receivers are power driven. They have a finite receive input
impedance, and it is almost always between 20 and 100 ohms in most rigs.
That requires power, not voltage alone. To require "voltage", the input
impedance woiuld be near infinite.

If the capacitor passes HF RF, then I suspect it is almost useless for
lightning. It would only be effective at VLF frequencies and lower as an
isolating device. Lightning and nearby stroke induced EMF has a rise time
that is very fast, so the cap looks like it is not even there.

>On receive, the *receiver* is the load presented to the line, not the
>antenna. I was talking specifically about cavity resonators where the
>input loop is DC shorted. However, some receivers use a shunt coil
>in their inputs, and that would have a similar, though not so pronounced,
>effect.

Protecting an HF receiver, via a surge suppressor that will carry
kilowatts of RF, is wishful thinking. As little as 50 volts of surge for a
few microseconds can ruin a receiver's front end. It's best to disconnect
antenna and main connections when the equipment is not in use. A simple T
network antenna tuner or high pass or band pass filter would do much more
than any of these gas tube gimmicks for protecting a receiver. A pair of
clamp diodes and a fuse link, plus a hardened front end would be better
than transmit type surge suppressors.

73 Tom


From [e-mail] Thu Jan 02 17:53:19 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Coax Connectors Impedance (yes, there *are* 75 ohm BNCs)
Date: 28 Dec 1996 17:38:56 GMT
Organization: AOL http://www.aol.com
Lines: 29
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]>, "Ian White, G3SEK"
<[e-mail]> writes:

>
>"BNC" stands for Bayonet Neil Concelman (Neil invented the N, Concelman
>the C which is a large bayonet connector, and the BNC uses ideas from
>both).
>
>Like BNCs, Ns are also available in 75 ohm, though much less commonly.
>
>

Ian,

I agree with everything you said except this.

The real inventor was Chuck Collingwood. He did this for the mitary in the
early 40's or 50's. He used them in a military repair depot, to do quick
connections to test equipment. He didn't even have the outer shell on the
connector, it was like an N male without the outer screw on part.

Collingwood had a real big nose, and his co-workers called him big nose
Chuck. They would ask each other for one of BNC's connectors, and the name
stuck even after the bayonete piece was added.

Never trust one source for critical data
Tom

PS Have a happy new year


From [e-mail] Thu Jan 02 17:53:22 1997
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From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: M.E.M.F.T.A.C., info wanted-------MODULATION OF EARTH'S MAG. FIELD-appear...
Date: 28 Dec 1996 17:38:59 GMT
Organization: AOL http://www.aol.com
Lines: 37
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]>, "Joe B. Clark" <[e-mail]>
writes:

>
>Does anyone have the old QST (from the early '60's) that describes this
>novel form of communication? A few points I remember---required low
>power, about 50W to reliably communicate several thousand miles, free
>from qrm,etc. Involved unique antenna systems by which you could "tune"
>to a specific magnetic line of force (earth's magnetic field), modulate
>it, and use as a medium for communication.  I have never seen
>m.e.m.f.t.a.c. (modulation of earth's magnetic field to affect
>communication) mentioned again.
>
>Any info is welcome.
>
>Thanks very much, es bcnu!
>
>de kc5itc, Joe, in Tx

If I recall right, that was in the April 62 or 63 issue Joe. Read it
carefully.

In the following April issue, they had a passive electron accelerator that
screwed into the transmission line. It used a large diameter conductor
that tapered into a narrow exit wire.

The idea is to copy a hose nozzle. The lazy electrons in the big conductor
would bunch up and squirt out the small opening. The velocity would
increase, and so the voltage would go up. The same current would flow, and
at higher voltage. So power would increase without any external power
source.

If you collect all the April QST's from the 60's, you will find many
articles of things that were wonderful ideas but never quite caught on.
They key is it's mostly in the April issues.

73 Tom


From [e-mail] Thu Jan 02 17:53:23 1997
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From: [e-mail] (brian whatcott)
Newsgroups: rec.radio.amateur.homebrew,sci.electronics.design
Subject: Re: Wanted: Tips for constructing water cooled load
Date: 28 Dec 1996 19:41:04 GMT
Organization: Zip News
Lines: 34
Message-ID: <5a3t4g$[e-mail]>
References: <[e-mail]> <59e1vd$[e-mail]> <[e-mail]> <[e-mail]> <59v8u8$[e-mail]> <5a2mss$[e-mail]>
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Xref: news1.epix.net rec.radio.amateur.homebrew:22545 sci.electronics.design:28883

In article <5a2mss$[e-mail]>, pinksnd@**io.com says...
>

>> >No, toaster elements ,and lightbulbs are inductive as well, and no
>> >good as an RF load.
>> >
>> >Gary Tait , VE3VBF
>
>ò How about some fairly thick bare nichrome wire supported from some
>ceramic
>structure, hanging down in a zig-zag pattern, in an oil-filled 55
gallon
>drum? If you zig-zag carefully, you can keep the inductance down quite
>low,
>where it might be acceptable at 300Khz, depending on your needs.
>Besides,
>the capacitance of a grounded metal drum just might balance it out. :)
>
>Also, IMHO, at 2Kv, water is not a safe option due to the shock
hazard.
>
>
>
>My 2ó
>--
>Gene
>
In my view, the inductance of a dummy 8kw load at 300 kHz is the
LEAST of your worries. But perhaps he meant 300 MHz?

Regards
brian whatcott <[e-mail]>
Altus OK



From [e-mail] Thu Jan 02 17:53:24 1997
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From: [e-mail] (Leonard G. Barton)
Newsgroups: rec.antiques.radio+phono,rec.audio.tubes,rec.radio.amateur.boatanchors,rec.radio.amateur.homebrew
Subject: Re: What are tiny tubes?
Date: 28 Dec 1996 19:49:41 GMT
Organization: Value Net Internetwork Services Inc.
Lines: 20
Message-ID: <5a3tkm$[e-mail]>
References: <>
NNTP-Posting-Host: k16.value.net
Xref: news1.epix.net rec.antiques.radio+phono:34302 rec.audio.tubes:20336 rec.radio.amateur.boatanchors:1324 rec.radio.amateur.homebrew:22532

[e-mail] (Steve McAllister) writes:
> I'm fairly new to working with vacuum tube radios.  Recently, I bought
> box of tubes to use and there were about 60-70 tiny little tubes --
> about 5/16 - 3/8" in diameter and about 1 - 1 1/4" long.  Some had
> regular pins coming off of the bottom, but most have insulated wire,
> about an inclh long.  Some of the numbers are:  JG-6021, JG-6111,
> AF-5840, JG-5896, 5641, JHS-5977, AF-5636, ...
>
> Are these "pencil tubes"?  What were these little guys used for?
> Portable electronics?    Do they have any practical use now?
>
> Thanks and happy new year!
> Steve
>
>
>
I saw these tubes in war surplus sonobouys (an anti-submaraine warfare device
dropped from an aircraft) in the early 1960's.  These were driven from a salt
water activated battery.



From [e-mail] Thu Jan 02 17:53:25 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!mr.net!news.idt.net!feed1.news.erols.com!news.bbnplanet.com!cpk-news-hub1.bbnplanet.com!mindspring!news9.agis.net!agis!newsgod1.agis.net!newspeer1.agis.net!agis!news.minn.net!news
From: "John Lockhart" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Electrolytic Capacitors
Date: 28 Dec 1996 21:01:33 GMT
Organization: Minn Net
Lines: 18
Message-ID: <01bbf4ff$6384b560$39c99dcc@default>
NNTP-Posting-Host: dialup-57.minn.net
X-Newsreader: Microsoft Internet News 4.70.1155


I bought some surplus 470 uF 450 VDC Rubycon electrolytic
capacitors recently and have a couple of questions on using
them.

I don't see a vent hole/plug - do they vent up ("blow their top)
or down?

I'm amazed at their small size (about 1 3/4" H by 1 1/4" Diam).
Is this a typical package size for 470 uF at 450 V nowadays??
(want to leave room for replacement in future)

Thanks for your help.  I don't want to build them into a project/
repair incorrectly.

73,

John  W0DC


From [e-mail] Thu Jan 02 17:53:27 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!enews.sgi.com!arclight.uoregon.edu!news-peer.gsl.net!news.gsl.net!news-lond.gsl.net!news.gsl.net!dispatch.news.demon.net!demon!ifwtech.demon.co.uk!ifwtech.demon.co.uk!G3SEK
From: "Ian White, G3SEK" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Coax Connectors Impedance (yes, there *are* 75 ohm BNCs)
Date: Sat, 28 Dec 1996 21:08:58 +0000
Organization: IFW Technical Services
Lines: 37
Distribution: world
Message-ID: <[e-mail]>
References: <[e-mail]>
 <[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>

Tom, W8JI wrote:
>In article <[e-mail]>, "Ian White, G3SEK"
><[e-mail]> writes:
>
>>
>>"BNC" stands for Bayonet Neil Concelman (Neil invented the N, Concelman
>>the C which is a large bayonet connector, and the BNC uses ideas from
>>both).
>>
>>Like BNCs, Ns are also available in 75 ohm, though much less commonly.
>>
>>
>
>Ian,
>
>I agree with everything you said except this.
>
>The real inventor was Chuck Collingwood. He did this for the mitary in the
>early 40's or 50's. He used them in a military repair depot, to do quick
>connections to test equipment. He didn't even have the outer shell on the
>connector, it was like an N male without the outer screw on part.
>
>Collingwood had a real big nose, and his co-workers called him big nose
>Chuck. They would ask each other for one of BNC's connectors, and the name
>stuck even after the bayonete piece was added.
>
>Never trust one source for critical data

That's always my problem - the more sources there are, the harder it is
to decide which one not to trust!

>
>PS Have a happy new year

Thanks, and the same to you-all.

73 from Ian G3SEK


From [e-mail] Thu Jan 02 17:53:28 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
From: Mark Taylor <[e-mail]>
Newsgroups: rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.amateur.misc
Subject: Re: Wanted: TM-V7A Mod
Date: Sat, 28 Dec 1996 21:54:33 -0500
Organization: Erol's Internet Services
Lines: 9
Message-ID: <[e-mail]>
References: <01bbf2eb$c25fdf80$0a66f0c6@general>
NNTP-Posting-Host: spg-as23s47.erols.com
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
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Xref: news1.epix.net rec.radio.amateur.equipment:45320 rec.radio.amateur.homebrew:22536 rec.radio.amateur.misc:122002

I would be very interested to know what the extended recieve is. anyone
know?
--
We laugh at honor, and are shocked to find traitors in our midst.
C.S. Lewis

They that can give up an essential liberty to purchase a little temporary
safety deserve neither liberty nor safety.   Ben Franklin



From [e-mail] Thu Jan 02 17:53:29 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.homebrew
Subject: Re: Telecommunications Act of 1996
Date: 29 Dec 1996 04:33:20 GMT
Organization: AOL http://www.aol.com
Lines: 20
Message-ID: <[e-mail]>
References: <01bbf47d$243282c0$[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]
X-Newsreader: AOL Offline Reader

In article <01bbf47d$243282c0$[e-mail]>, "J Mullins"
<[e-mail]> writes:

>   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 key phrase that would cover amateur antennas isn't there.  We usually
have antennas which not ony receive but transmit.  It would have been nice
if the FCC had pre-empted amateur antennas from covenants and
restrictions, but so far, it has not done so.  Relying on that pre-emption
will give an amateur a sinking feeling if the homeowner's association or
municipality or whatever is being sued has a competent atty.  The
communications acts of 1996 have been an almost unmitigated disaster for
amateurs so far.  Congress mandated sale of amateur frequencies, and we
got nothing in return for example.  -art clemons-


From [e-mail] Thu Jan 02 17:53:31 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!worldnet.att.net!newsadm
From: Brian Chesire <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Need help for SERVO CONTROL
Date: Sat, 28 Dec 1996 21:56:19 -0800
Organization: AT&T WorldNet Services
Lines: 24
Message-ID: <[e-mail]>
References: <59uobg$[e-mail]>
NNTP-Posting-Host: 207.147.234.64
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.0C-WorldNet  (Win16; I)

Steve & Gale Carlisle wrote:
>
>         I am hopeing a fellow HAM would be able to give me some advice on th
e
>         design of a low cost,  CLOSED LOOP SERVO CONTROLLER that would suppo
rt
>         ttl signals that provide for motor pulse(step) and direction. All th
e
>         info that I have come across so far deals with motion control chips
>         like the LM628/629. These chips are very expensive and require a hos
t
>         processor. This application is for antenna control. The servo,s that
 I
>         have provide the incremental encoder output pulses. Any help on this
>         project would be greatly appreciated.
>
>                                                 Thanks, Steve Carlisle VE7AH
L
Steve
 If you are using stepper motors consider the UCN5804, available from
alltronics for $4.50 I think. It will drive a unipolar stepper with over
an amp and I think up to 40 volts.
        If you're using DC servo motors, check out tje PIC-SERVO/PIC-ENC chip
set from JR Kerr. All the data is available on the web. They will
control just about any motor driver you can come up with including
national's LMD series and any of the commercial servo amps. Email adress
is [e-mail]
        Hope this helps or at least gets you started in a new direction.

Brian, WA5PPO


From [e-mail] Thu Jan 02 17:53:33 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!news.nap.net!news.wwa.com!news
From: [e-mail] (M Simon)
Newsgroups: rec.radio.amateur.homebrew,sci.electronics.design
Subject: Re: Wanted: Tips for constructing water cooled load
Date: Sun, 29 Dec 1996 06:06:43 GMT
Organization: Space-Time Productions
Lines: 27
Message-ID: <5a51pq$[e-mail]>
References: <[e-mail]> <59e1vd$[e-mail]>
NNTP-Posting-Host: 206.230.95.11
X-Newsreader: Forte Free Agent 1.0.82
Xref: news1.epix.net rec.radio.amateur.homebrew:22539 sci.electronics.design:28873

Adjusting the conductivity of the water (sulfuric acid) and the
immersion level of the plates was used in Idaho to dissipate
100 - 500 MW. The cooling towers were two stories high.

Your needs might not be so extreme.

Simon
-----------------------------------------------------------
lprevo@rulhe1 (Leendert Prevo) wrote:

>Jim Potter ([e-mail]) wrote:
>: I am wanting to build a non-inductive 8 kW load for 300 kHz, CW.  The
>.............


>It may be possible to use 2 plates, immersed in water, as the contacts
>of a resistor. As the water gets hot and evaporates, the barrel has to
>be refilled after some time.
>leendert prevo
>

In the end people get the government they deserve.

Read "The Weapon Shops of Isher" by A.E. vanVogt

Simon



From [e-mail] Thu Jan 02 17:53:34 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!news.sprintlink.net!news-peer.sprintlink.net!uunet!in3.uu.net!199.171.190.20!news.deltanet.com!usenet
From: [e-mail] (Dave Rugh)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: 2m FM project for Theater
Date: 29 Dec 1996 06:36:41 GMT
Organization: Delta Internet Services, Anaheim, CA
Lines: 20
Message-ID: <5a53hp$[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: anx-ana4227.deltanet.com
Mime-Version: 1.0
Content-Type: Text/Plain; charset=US-ASCII
X-Newsreader: WinVN 0.99.7

In article <[e-mail]>, [e-mail] says...
>
>
>Being new to ham radio, and having a problem that could be solved with ham
>radio, I thought I'd ask some help for a litte project.
>
>For a play I am directing, I need to turn on a switch remotely.  (BTW, the
>play is being performed by my Youth Drama Team at my church.)  I thought
>that it might be possible, and simple, to create a reciever that would
>throw a relay after receiving a code from the tone pad on my handheld.
>


If you're near a Fry's Electronics (Northern & Southern Calif) you could
pick up a DTMF encoder/decoder kit and use that. I think they also have
transmitter/receiver pairs used for remote control.  The kits run around
$30 and come with PCBs.

Dave



From [e-mail] Thu Jan 02 17:53:35 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!arclight.uoregon.edu!worldnet.att.net!newsadm
From: [e-mail]
Newsgroups: alt.radio.scanner,rec.radio.scanner,rec.radio.swap,rec.radio.amateur.homebrew,rec.radio.amateur.equipment
Subject: Re: RS PRO 26
Date: Sun, 29 Dec 1996 07:14:36 GMT
Organization: AT&T WorldNet Services
Lines: 17
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: 207.146.65.75
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Newsreader: Forte Agent .99f/32.275
Xref: news1.epix.net alt.radio.scanner:43706 rec.radio.scanner:74362 rec.radio.swap:101673 rec.radio.amateur.homebrew:22541 rec.radio.amateur.equipment:45340

On Thu, 26 Dec 1996 22:38:59 -0600, [e-mail] wrote:
>I posted a few days ago saying I could get hold of a RS PRO-26 for $200
>from a PAWN shop.  It sells for around $450 from RS.  I believe this is
>a good price even though I would only get a 30 day warrenty.  No one
>responded What do you think about the deal?

Buy it! You might even try to talk them down a few bucks. Believe it
or not, I was able to find the same scanner for $100 also at a pawn
shop. I think they must have mistaken it for an older model since it
was a lower number than they were used to seeing. They don't make this
type of mistake often so if you're lucky enough to catch one, grab it!


Enjoy!

John



From [e-mail] Thu Jan 02 17:53:37 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!arclight.uoregon.edu!newsfeeds.sol.net!news.maxwell.syr.edu!horatio.csd.wwwi.com!news.genuity.net!news.lafn.org!usenet
From: Ted Yamada <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: 2m FM project for Theater
Date: Sat, 28 Dec 1996 23:29:31 -0800
Organization: lafn.org
Lines: 31
Message-ID: <[e-mail]>
References: <[e-mail]> <5a53hp$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: 192.168.16.3
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.0Gold (Win95; U)

Dave Rugh wrote:
>
> In article <[e-mail]>, [e-mail] says...
> >
> >
> >Being new to ham radio, and having a problem that could be solved with ham
> >radio, I thought I'd ask some help for a litte project.
> >
> >For a play I am directing, I need to turn on a switch remotely.  (BTW, the
> >play is being performed by my Youth Drama Team at my church.)  I thought
> >that it might be possible, and simple, to create a reciever that would
> >throw a relay after receiving a code from the tone pad on my handheld.
> >
>
> If you're near a Fry's Electronics (Northern & Southern Calif) you could
> pick up a DTMF encoder/decoder kit and use that. I think they also have
> transmitter/receiver pairs used for remote control.  The kits run around
> $30 and come with PCBs.
>
> Dave

Or, go to a good hardware store in your area. Find one of those
battery operated door bells with the remote control(RF) push button.

Get one of the cheap ones, they cost apx $10.00.

Remove the bell/buzzer and replace it with a
transistor + relay + misc , presto!

Ted...
(The one I got here in front of me is made by Nutone)


From [e-mail] Thu Jan 02 17:53:37 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!uwm.edu!homer.alpha.net!news
From: scott <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: WTB: VMP4 Power MOSFET or equivalent !
Date: Sun, 29 Dec 1996 00:30:50 -0800
Organization: Aero Head Aviation/MS Industries
Lines: 5
Message-ID: <[e-mail]>
NNTP-Posting-Host: ppp25.westby.mwt.net
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 2.0 (Win16; U)

Where can a guy find a VMP4 Power MOSFET?  It was made by Siliconix.
Thus far, sources for Siliconix (now TEMIC) parts has come up empty.
Anybody know the specs for it?  How about an equivalent replacement,
maybe an IRF511 or something??  HELP!  2M transverter project stalled
until I can overcome this!  73, Scott, N0EDV.


From [e-mail] Thu Jan 02 17:53:38 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.bbnplanet.com!cpk-news-hub1.bbnplanet.com!mindspring!news9.agis.net!agis!newspeer1.agis.net!agis!atmnet.net!usenet
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]>
NNTP-Posting-Host: 207.67.190.117
X-Newsreader: Microsoft Internet News 4.70.1155
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 17:53:39 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!vixen.cso.uiuc.edu!howland.erols.net!newsfeed.internetmci.com!news.telstra.net!nsw1.news.telstra.net!news02.magna.com.au!news.magna.com.au!trash
From: [e-mail] (Trash)
Newsgroups: rec.radio.amateur.misc,rec.radio.amateur.digital.misc,rec.radio.amateur.policy,rec.radio.amateur.homebrew,rec.radio.scanner,rec.radio.shortwave,aus.radio.amateur.misc,aus.radio.amateur.digital
Subject: Re: www.hamradio-online.com: How Your Government Can Monitor Your Communications
Date: Sun, 29 Dec 96 11:07:13 GMT
Organization: Bastards Inc
Lines: 15
Message-ID: <5a5cfs$[e-mail]>
References: <59pfq4$[e-mail]> <59pq6i$[e-mail]>
NNTP-Posting-Host: trash.magna.com.au
X-Newsreader: News Xpress 2.0 Beta #2
Xref: news1.epix.net rec.radio.amateur.misc:122079 rec.radio.amateur.digital.misc:20934 rec.radio.amateur.policy:44912 rec.radio.amateur.homebrew:22553 rec.radio.scanner:74403 rec.radio.shortwave:91447 aus.radio.amateur.misc:1704 aus.radio.amateur.digital:316

In article <59pq6i$[e-mail]>, [e-mail] (
Michael P. Deignan) wrote:

>>With permission, we've reprinted a fascinating story from CovertAction
>>Quarterly, on worldwide government agencies ability to monitor your email,
> FAX,
>>computer and voice communications.
>
>Old news. Government agencies have had the capability for years.

  And they're still trying to work out what to do with it other than testing
it on 0055 numbers !!!


Ash



From [e-mail] Thu Jan 02 17:53:41 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!news.kei.com!newsfeed.internetmci.com!news.indigo.ie!usenet
From: [e-mail]
Newsgroups: rec.radio.amateur.homebrew
Subject: HAM TOOLKIT CD ROM..AWSOME>>
Date: Sun, 29 Dec 1996 14:36:52 GMT
Organization: Indigo
Lines: 16
Message-ID: <[e-mail]>
NNTP-Posting-Host: ts02-06.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

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 17:53:42 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!not-for-mail
From: Burt Fisher <[e-mail]>
Newsgroups: rec.radio.amateur.misc,rec.radio.amateur.digital.misc,rec.radio.amateur.policy,rec.radio.amateur.homebrew,rec.radio.scanner,rec.radio.shortwave,aus.radio.amateur.misc,aus.radio.amateur.digital
Subject: The Worst Ham page
Date: Sun, 29 Dec 1996 10:06:13 -0500
Organization: The Anti fats
Lines: 17
Message-ID: <[e-mail]>
References: <59pfq4$[e-mail]> <59pq6i$[e-mail]> <5a5cfs$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: 70.ccsnet.com
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.0Gold (Win95; I)
Xref: news1.epix.net rec.radio.amateur.misc:122061 rec.radio.amateur.digital.misc:20930 rec.radio.amateur.policy:44905 rec.radio.amateur.homebrew:22550 rec.radio.scanner:74393 rec.radio.shortwave:91439 aus.radio.amateur.misc:1703 aus.radio.amateur.digital:315

Please visit my World Wide Web Site, you have never seen a page like it.
You will see:

1. A naked chic
2. The writings of me and others on ham radio.
3. The warm side of K1OIK.
4. A test for your SVGA monitor
5. A picture of me and my family.
6. A Nazi connection in ham radio???


Burt Fisher    Teacher of video, broadcasting and electronics
Amateur call           South Dennis, Ma. (Cape Cod)
  K1OIK        If you sit on the fence, it is a pain in the butt

               [e-mail]    [e-mail]
               www.geocities.com/WallStreet/5169


From [e-mail] Thu Jan 02 17:53:43 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!swrinde!ihnp4.ucsd.edu!news1.ucsd.edu!news-mail-gateway
From: [e-mail] (eric)
Newsgroups: rec.radio.amateur.homebrew
Subject: TH79A Problem?
Date: 29 Dec 96 15:25:20 GMT
Organization: ucsd usenet gateway
Lines: 15
Message-ID: <[e-mail]>
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]

I have noticed the display of my TH79A to fade out for several minutes, fade
in and then function normally.  This may occur several times in a forty
minute period of RECEIVE.  Other than the display's fade out, the unit seems
to function (RECEIVE) without problem.  I have not been successful in
determining if the cause is physical- i.e., movement of circuit boards,
case, battery, etc., or electrical.  (Note: I am in a waiting status for my
Italian permit- the reason for no experience with TRANSMIT related problems.)

I would appreciate anyone's help/experience.

Thanks,

Eric
KB2YAM



From [e-mail] Thu Jan 02 17:53:44 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.ecn.uoknor.edu!munnari.OZ.AU!ihnp4.ucsd.edu!news1.ucsd.edu!news-mail-gateway
From: [e-mail] (eric)
Newsgroups: rec.radio.amateur.homebrew
Subject: Used HT ID
Date: 29 Dec 96 15:25:28 GMT
Organization: ucsd usenet gateway
Lines: 15
Message-ID: <[e-mail]>
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]

Can one of the group recommend a used HT for which fits the following
requirements?

--Dual band (2m and 70cm)
--High power (~2-5Watts)
--Manual frequency switching (i.e., thumbwheels- display not necessary)
--Rugged


Thanks

73
Eric,
KB2YAM



From [e-mail] Thu Jan 02 17:53:45 1997
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From: [e-mail] (Dick Flanagan)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Used HT ID
Date: Sun, 29 Dec 1996 10:07:27 -0800
Organization: Libelle Productions, Inc., Minden, Nevada USA
Lines: 23
Distribution: world
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X-Newsreader: Yet Another NewsWatcher 2.3.6

In article <[e-mail]>, [e-mail]
(eric) wrote:

>Can one of the group recommend a used HT for which fits the following
>requirements?
>
>--Dual band (2m and 70cm)
>--High power (~2-5Watts)
>--Manual frequency switching (i.e., thumbwheels- display not necessary)
>--Rugged

Dual-band with thumbwheels might be tough, but one of the most rugged and
bullet-proof high-power dual-band HTs ever built is the ICOM IC-32AT.  It
also is one of the last of the HTs with excellent receiver audio volume.

They come with PL encode and with the appropriate option boards, they can
also be used for PL and DTMF (paging) decode.  I use one as my personal HT
and another as a portable base station.  I have no intention of ever
getting rid of them.

They are currently selling used for around $300.
--
Dick Flanagan W6OLD CFII Minden, Nevada


From [e-mail] Thu Jan 02 17:53:46 1997
From: [e-mail] (Don Phelps)
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!miwok!infoway!don.phelps
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: What are tiny tubes?
Message-ID: <[e-mail]>
Date: Sun, 29 Dec 1996 18:20:56 GMT
Distribution: world
Organization: The Infoway BBS [phone] 28,800 8-N-1
Lines: 20

In the late 60's, we built some low-noise preamps at 60 MHz using
a small tube, called a Nuvistor, I believe.  They had
metal envelopes, about 3/8" by about 1 inch.  They had little pins
in a base recessed in the metal envelope.

These were great little tubes.

Don, N6MCE

 > box of tubes to use and there were about 60-70 tiny little tubes --
 > about 5/16 - 3/8" in diameter and about 1 - 1 1/4" long.  Some had
 > regular pins coming off of the bottom, but most have insulated wire,
 > about an inclh long.  Some of the numbers are:  JG-6021, JG-6111,
 > AF-5840, JG-5896, 5641, JHS-5977, AF-5636, ...

 > Steve


... [e-mail]  1:125/104 POBox 9739 San Rafael,CA 94912
___ Blue Wave/386 v2.30 [NR]


From [e-mail] Thu Jan 02 17:53:48 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!uunet!in2.uu.net!194.20.35.13!news.vol.it!news
From: "Brian E. Cauchi" <[e-mail]>
Newsgroups: alt.ham-radio.digital-voice,es.rec.radio.amateur,fido7.hamradio,rec.radio.amateur,rec.radio.amateur.digital.misc,rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.amateur.misc,rec.radio.amateur.space,rec.radio.shortwave,su.org.ham
Subject: Re: FAX SSTV RTTY WEFAX with SoundBlaster: OK!
Date: 29 Dec 1996 18:53:57 GMT
Organization: Video On Line
Lines: 38
Message-ID: <01bbf5b9$82e63360$0100a8c0@mstcp>
References: <01bbb553$986b4320$0923a6c2@gateway> <01bbd3f3$91a45400$1623a6c2@gateway>
NNTP-Posting-Host: 194.166.35.34
X-Newsreader: Microsoft Internet News 4.70.1155
Xref: news1.epix.net es.rec.radio.amateur:758 fido7.hamradio:182 rec.radio.amateur.digital.misc:20939 rec.radio.amateur.equipment:45381 rec.radio.amateur.homebrew:22557 rec.radio.amateur.misc:122094 rec.radio.amateur.space:9251 rec.radio.shortwave:91450

 Hello.
 I've just updated my FTV program, which does FAX & SSTV using a SoundCard,
 to decode Baudot using the same (FM) demodulation engine.

 Here is a run down of the more interesting features:

 (1) It keeps the demodulated signal in memory, so that the signal can be
 analysed again at a different keying rate or polarity! Garbage can be
 resampled on the fly, which means that minutes of received signals decoded
 at the wrong baud rate or keying polarity are recovered, on the fly, while
 still receiving.

 (2) Keying rate and polarity are analysed automatically - standard baud
 rates are automatically set following analysis.

 (3) Tuning oscilloscope available at all times, without loss of copy.

 (4) Program works in real time.

 (5) I wrote it, and I love it - I myself can't believe it works so well!

 Download your copy of FTV from my web site, at:
 http://www.geocities.com/SiliconValley/2504

 System requirements, and the standard features of FTV are described in the
 following page:
 http://www.geocities.com/SiliconValley/2504/ftv.htm

 By the way, AM signals from low orbiting weather satellites are also
 decoded - no extra interfaces needed. Demodulation mode is user selectable
 in software.

 Hope you all have a load of fun receiving 'words and pictures' - I hope to
 get some feedback !

 Happy New Year 1997
 All the best from Brian, 9H1JS, on the Island of Malta.



From [e-mail] Thu Jan 02 17:53:49 1997
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From: [e-mail] (M. Monninger)
Newsgroups: rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.amateur.boatanchors,rec.radio.swap
Subject: Kneed a Couple Knobs...
Date: 29 Dec 1996 15:50:02 -0700
Organization: None
Lines: 14
Message-ID: <5a6siq$[e-mail]>
X-Posted-By: @206.165.20.14 (markem)
X-Newsreader: News Xpress 2.0 Beta #2
Xref: news1.epix.net rec.radio.amateur.equipment:45418 rec.radio.amateur.homebrew:22564 rec.radio.amateur.boatanchors:1352 rec.radio.swap:101818

Greetings all...

I need a couple large knobs, anywhere between 2 and 2.5 in. diameter. Must be
for 1/4" shaft and have a setscrew. Not picky about style. Would like two
matching knobs, tho. If anyone has a couple laying around they'd be willing to

part with, pls let me know. Or if anyone has a source for them, pls pass it
along. I've looked in all my catalogs and other on-line sources without any
luck. Lots of little ones but no big ones.

Actually, I'm trying to find the large knobs for a Johnson Matchbox tuner. I'd

REALLY like to find a couple for it but will settle for a pair of large
generic knobs.

Thanks, 73, & HNY...     Mark   AA7TA


From [e-mail] Thu Jan 02 17:53:50 1997
Path: news1.epix.net!news3.epix.net!uunet!in1.uu.net!128.83.139.5!cs.utexas.edu!news.cs.utah.edu!news.cc.utah.edu!news
From: David Whipple <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Mods TH79-a
Date: Sun, 29 Dec 1996 16:05:10 -0700
Organization: University of Utah Computer Center
Lines: 6
Message-ID: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: ctsasync71.cc.utah.edu
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.0 (Win95; I)

Does anybody know if there is any truth to the rumored keyboard mod for
exteded receive for the Kenwood TH79-A??  I've read the piece on cutting
out the diode, but if there is a simpler way I'd like to know.

Thanks
KC7MJR


From [e-mail] Thu Jan 02 17:53:51 1997
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From: [e-mail] (Casey)
Newsgroups: rec.radio.amateur.misc,rec.radio.amateur.digital.misc,rec.radio.amateur.policy,rec.radio.amateur.homebrew,rec.radio.scanner,rec.radio.shortwave,aus.radio.amateur.misc,aus.radio.amateur.digital
Subject: Re: The Worst Ham page
Date: Mon, 30 Dec 1996 00:19:44 GMT
Organization: Starfleet Command
Lines: 21
Message-ID: <[e-mail]>
References: <59pfq4$[e-mail]> <59pq6i$[e-mail]> <5a5cfs$[e-mail]> <[e-mail]>
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On Sun, 29 Dec 1996 10:06:13 -0500, Burt Fisher <[e-mail]>
wrote:

>Please visit my World Wide Web Site, you have never seen a page like it.
>You will see:
>
>1. A naked chic
>2. The writings of me and others on ham radio.
>3. The warm side of K1OIK.
>4. A test for your SVGA monitor
>5. A picture of me and my family.
>6. A Nazi connection in ham radio???
>
>
>Burt Fisher    Teacher of video, broadcasting and electronics
>Amateur call           South Dennis, Ma. (Cape Cod)
>  K1OIK        If you sit on the fence, it is a pain in the butt
>
>               [e-mail]    [e-mail]
>               www.geocities.com/WallStreet/5169
Stop wasting bandspace with your sophmoric garbage. Grow up.


From [e-mail] Thu Jan 02 17:53:52 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]
NNTP-Posting-Host: agtc164.cadvision.com
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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 17:53:53 1997
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From: "Jerry and Gail" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: FS: Boonton 103A Inductors
Date: 30 Dec 1996 00:43:55 GMT
Organization: Home
Lines: 23
Message-ID: <01bbf5ec$02ee9de0$05eb2399@newmicronpc>
NNTP-Posting-Host: cust5.max4.san-francisco.ca.ms.uu.net
X-Newsreader: Microsoft Internet News 4.70.1155

For sale: Two sets of Boonton 103A Standard Inductors.

Set 1:  (Cans somewhat cruddy from long storage, but should clean up OK)
   Ten inductors:  O.25, 0.5, 1,  5, 35, 100, 500 microhenry
                           2.5, 10, 25 millihenry

Set 2:  (Cans cleaner than Set 1)
    Sixteen Inductors: 0.25, 0.5, 1, 2.5, 5, 10, 25, 50, 100, 250, 500
microhenry
                                1, 2.5, 5, 10, 25  millihenry

Set 1 has a labelled wooden mounting board that I don't really care to ship
unless the buyer can't live without it! (The labels are frequency range for
each coil.)

Prices:  Set 1,  $35 plus shipping
            Set 2,  $50 plus shipping         Both sets for $75 plus
shipping.

Will deliver within 30 mi more or less from Palo Alto, CA

Jerry   AI6L     [phone]



From [e-mail] Thu Jan 02 17:53:54 1997
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From: [e-mail] (Phil Clements)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Clamping Diode
Date: 30 Dec 1996 00:51:49 GMT
Organization: Your Organization
Lines: 25
Message-ID: <5a73n5$[e-mail]>
References: <59l13l$[e-mail]> <[e-mail]> <01bbf1fa$32387760$310f2399@peter-s> <[e-mail]>
NNTP-Posting-Host: a2p29.connect.net
X-Newsreader: WinVN 0.92.1

In article <[e-mail]>, [e-mail] (W6KKT Jesse
) says:
>
>On 25 Dec 1996 00:26:35 GMT, "Peter Gottlieb" <[e-mail]>
>wrote:
>
>snip....>>
>>It's a positive spike - check it with a 'scope.  And the diode will slow
>>down the
>>release of the relay because it keeps current flowing longer in the coil.
>snip....
>>
>>
>Hi Peter,  I use diodes across relay coils when I wan't them to open
>faster not slower!  Where have I gone wrong?
>73, Jesse, W6KKT

 Hi, Jesse, Peter is correct. if you are trying to use a vacuum relay for
 QSK keying, you can easily measure that the release time is increased by the
 diode accross the coil. This problem is eliminated by putting a zener diode
 of the same voltage rating as the relay in series with the diode accross the
 coil...the band on the zener goes to the minus terminal on the relay. This
 limits the spike, saves the switching transistor, and speeds up the relay
 release time.

 (((73))) Phil, K5PC


From [e-mail] Thu Jan 02 17:53:55 1997
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From: [e-mail] (lbliao)
Newsgroups: sci.electronics.design,sci.electronics.misc,rec.radio.swap,rec.radio.amateur.homebrew
Subject: Rigorous analysis of Twin-T Filter
Date: 30 Dec 1996 01:24:00 GMT
Organization: California Institute of Technology, Pasadena
Lines: 12
Message-ID: <5a75jg$[e-mail]>
NNTP-Posting-Host: alumnae.caltech.edu
Xref: news1.epix.net sci.electronics.design:28946 sci.electronics.misc:19299 rec.radio.swap:101831 rec.radio.amateur.homebrew:22567

I am looking for any book that does the rigorous analysis of the twin T
filter. Preferably, the book or paper should discuss all the modes of
operation of the filter including those when the zeros are in the right
half plane. Information on other filters that are either notch or peaking
at a certain frequency with better performance or lower parts count, or
allowing simple adjustment of the frequency is also welcome.


Thanks a lot!
lbliao




From [e-mail] Thu Jan 02 17:53:56 1997
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From: "Chad Sims" <[e-mail]>
Newsgroups: rec.radio.amateur.misc,rec.radio.amateur.digital.misc,rec.radio.amateur.policy,rec.radio.amateur.homebrew,rec.radio.scanner,rec.radio.shortwave,aus.radio.amateur.misc,aus.radio.amateur.digital
Subject: Re: The Worst Ham page
Date: 30 Dec 1996 02:58:41 GMT
Organization: wsnet.com
Lines: 17
Message-ID: <01bbf5fd$57b60be0$[e-mail]>
References: <59pfq4$[e-mail]> <59pq6i$[e-mail]> <5a5cfs$[e-mail]> <[e-mail]> <[e-mail]>
NNTP-Posting-Host: 206.185.38.32
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Casey <[e-mail]> wrote in article <[e-mail]>...
> On Sun, 29 Dec 1996 10:06:13 -0500, Burt Fisher <[e-mail]>
> wrote:
>
>
> >               [e-mail]    [e-mail]
> >               www.geocities.com/WallStreet/5169
> Stop wasting bandspace with your sophmoric garbage. Grow up.
>
        I liked his webpage. I found a lot of humor in it. And I found your
comments rude and un-called for.

With regards,
Chad



From [e-mail] Thu Jan 02 17:53:57 1997
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From: [e-mail] (Casey)
Newsgroups: rec.radio.amateur.misc,rec.radio.amateur.digital.misc,rec.radio.amateur.policy,rec.radio.amateur.homebrew,rec.radio.scanner,rec.radio.shortwave,aus.radio.amateur.misc,aus.radio.amateur.digital
Subject: Re: The Worst Ham page
Date: Mon, 30 Dec 1996 03:27:17 GMT
Organization: Starfleet Command
Lines: 21
Message-ID: <[e-mail]>
References: <59pfq4$[e-mail]> <59pq6i$[e-mail]> <5a5cfs$[e-mail]> <[e-mail]> <[e-mail]> <01bbf5fd$57b60be0$[e-mail]>
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On 30 Dec 1996 02:58:41 GMT, "Chad Sims" <[e-mail]> wrote:

>
>
>Casey <[e-mail]> wrote in article <[e-mail]>...
>> On Sun, 29 Dec 1996 10:06:13 -0500, Burt Fisher <[e-mail]>
>> wrote:
>>
>>
>> >               [e-mail]    [e-mail]
>> >               www.geocities.com/WallStreet/5169
>> Stop wasting bandspace with your sophmoric garbage. Grow up.
>>
>       I liked his webpage. I found a lot of humor in it. And I found your
>comments rude and un-called for.
>
>With regards,
>Chad
>
Are you Burts Parrot? I bet you sit on his shoulder and go "awwk, your
right Burt"! Awwk, your right Burt!"


From [e-mail] Thu Jan 02 17:53:58 1997
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From: [e-mail] (Casey)
Newsgroups: rec.radio.amateur.misc,rec.radio.amateur.digital.misc,rec.radio.amateur.policy,rec.radio.amateur.homebrew,rec.radio.scanner,rec.radio.shortwave,aus.radio.amateur.misc,aus.radio.amateur.digital
Subject: Re: The Worst Ham page
Date: Mon, 30 Dec 1996 03:36:11 GMT
Organization: Starfleet Command
Lines: 22
Message-ID: <[e-mail]>
References: <59pfq4$[e-mail]> <59pq6i$[e-mail]> <5a5cfs$[e-mail]> <[e-mail]>
NNTP-Posting-Host: ts3p6.ro.com
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On Sun, 29 Dec 1996 10:06:13 -0500, Burt Fisher <[e-mail]>
wrote:

>Please visit my World Wide Web Site, you have never seen a page like it.
>You will see:
>
>1. A naked chic
>2. The writings of me and others on ham radio.
>3. The warm side of K1OIK.
>4. A test for your SVGA monitor
>5. A picture of me and my family.
>6. A Nazi connection in ham radio???
>
>
>Burt Fisher    Teacher of video, broadcasting and electronics
>Amateur call           South Dennis, Ma. (Cape Cod)
>  K1OIK        If you sit on the fence, it is a pain in the butt
>
>               [e-mail]    [e-mail]
>               www.geocities.com/WallStreet/5169
Hey Marc,
 Why don't you send me your real e-mail address you coward?


From [e-mail] Thu Jan 02 17:54:00 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!news.bbnplanet.com!cam-news-hub1.bbnplanet.com!uunet!in1.uu.net!205.137.48.144!news2.agis.net!agis!newspeer1.agis.net!agis!news.monmouth.com!news
From: The Bakers <[e-mail]>
Newsgroups: rec.radio.amateur.misc,rec.radio.amateur.digital.misc,rec.radio.amateur.policy,rec.radio.amateur.homebrew,rec.radio.scanner,rec.radio.shortwave,aus.radio.amateur.misc,aus.radio.amateur.digital
Subject: Re: The Worst Ham page
Date: Sun, 29 Dec 1996 22:42:58 -0500
Organization: Monmouth Internet
Lines: 21
Message-ID: <[e-mail]>
References: <59pfq4$[e-mail]> <59pq6i$[e-mail]> <5a5cfs$[e-mail]> <[e-mail]> <[e-mail]>
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Casey wrote:
>
> On Sun, 29 Dec 1996 10:06:13 -0500, Burt Fisher <[e-mail]>
> wrote:
>
> >Please visit my World Wide Web Site, you have never seen a page like it.
>
..snipped..

> Stop wasting bandspace with your sophmoric garbage. Grow up.


Hey Casey:

How are things at "Starfleet Command" ??
Sheeeeesh, talk about sophomoric !

Burt rules!

M. Baker WA3ZXO
[e-mail]


From [e-mail] Thu Jan 02 17:54:01 1997
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From: Ron D'Eau Claire <[e-mail]>
Newsgroups: rec.antiques.radio+phono,rec.audio.tubes,rec.radio.amateur.boatanchors,rec.radio.amateur.homebrew
Subject: Re: What are tiny tubes?
Date: Sun, 29 Dec 1996 20:32:30 -0800
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Steve McAllister wrote:
>
> I'm fairly new to working with vacuum tube radios.  Recently, I bought
> box of tubes to use and there were about 60-70 tiny little tubes --
> about 5/16 - 3/8" in diameter and about 1 - 1 1/4" long.  Some had
> regular pins coming off of the bottom, but most have insulated wire,
> about an inclh long.  Some of the numbers are:  JG-6021, JG-6111,
> AF-5840, JG-5896, 5641, JHS-5977, AF-5636, ...
>
> Are these "pencil tubes"?  What were these little guys used for?
> Portable electronics?    Do they have any practical use now?
>
> Thanks and happy new year!
> Steve

I had a shirt pocket a.m. broadcast band radio in the 1950's that used
three of them in a regenerative (Armstrong) receiver circuit. One regen
detector plus two audio amps. They were common in the shirt pocket sized
hearing aids of that era too. 1.5 Volt filaments and 15 volts or so on
the plates. I seem to recall that the max plate voltage was about 60
volts.

Ran into them again in the 1960's servicing Collins short-wave receivers
and transcievers used in large USAF aircraft such as B-50 Bombers. They
were used in the VFOs. I suspect that the very low power consumption and
heat was the reason they were chosen, as those VFO's were legendary for
stabilizing quickly after power on and for keeping their calibration
over time. The tubes were right inside the sealed VFO cylindrical
container along with the tuned circuit and other VFO components.

Ron, AC6Y


From [e-mail] Thu Jan 02 17:54:02 1997
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From: [e-mail] (Robert Paschal)
Newsgroups: rec.radio.amateur.homebrew
Subject: 8 kw dummy load
Date: 30 Dec 96 04:40:59 GMT
Organization: ucsd usenet gateway
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Just got our electric power back this pm here in western Washington so am
just reviewing the Dec 27 submissions.

The suggestion for using a baseboard electric heater caught me attention as I
have one stored in the garage.  But -- I would have supposed that the
elements in these are wire-wound --?  It so, would this not introduce a very
large inductive reactance??  Tell me it ain't so.

Bob  AA0MC



From [e-mail] Thu Jan 02 17:54:03 1997
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From: "Lawrence C. Smith" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew,sci.electronics.design
Subject: Re: Wanted: Tips for constructing water cooled load
Date: Mon, 30 Dec 1996 00:07:23 -0500
Organization: International Automation
Lines: 38
Message-ID: <[e-mail]>
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Jeff Lutes wrote:
>
> Try this one...have seen one built for a MUCH larger load...but should still
> work:
>
>         Powder the following components:
>                 Copper
>                 non-conductive plastic
>                 graphite
>
> Mix them (play with the ratios to get the correct value) and pack them into
a
> piece of PVC pipe.  Place a copper conductor through the end caps and seal t
he
> end caps on the pipe.  (i.e. build a resistor from HELL).
>
> The one I saw was actually in a 5-gallon bucket full of oil for cooling.
>
> In article <[e-mail]>, Gary Ta
it
> <[e-mail]> wrote:
> >On Sat, 21 Dec 1996, Mark Robinson wrote:
> >
> >#> : I am wanting to build a non-inductive 8 kW load for 300 kHz, CW.  The
> >#
> >#Given the low frequency, what about a few toaster elements, or 1kW
> >#linear quartz halogen flood lamp bulbs (adjust impedance by adjusting
> >#drive :)
> >#
> >
> >No, toaster elements ,and lightbulbs are inductive as well, and no
> >good as an RF load.
> >
> >Gary Tait , VE3VBF
> >
> >
Grainger (Industrial Catalog Sales Company - should be in your local
phone book) sells replacement heater elements for water heaters -
including ones that dont have to be immersed in water.  I have used
these for power supply loads up to 15,000 watts (8 of them in series
parallel) they are not terribly expensive.


From [e-mail] Thu Jan 02 17:54:04 1997
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From: "Jerry and Gail" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Boonton Inductors sold!!
Date: 30 Dec 1996 05:08:09 GMT
Organization: Home
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NNTP-Posting-Host: cust98.max20.san-francisco.ca.ms.uu.net
X-Newsreader: Microsoft Internet News 4.70.1155

The Boonton inductors, both sets, have been sold.  Thanks, all.

Jerry  AI6L


From [e-mail] Thu Jan 02 17:54:07 1997
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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
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X-Newsreader: Microsoft Internet News 4.70.1160
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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 17:54:08 1997
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From: Gerry & Robin Lempicki <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: inductive coupling a meter?
Date: Sun, 29 Dec 1996 21:17:54 -0800
Organization: University of Massachusetts, Amherst
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I salvaged a few old meters from some old equipment.  I would like to
change the faces and hook these up to indicate power out (not looking
for anything accurate, just a neat large meter needle jumping on
voice/signal modulation...these are abt 6" x 9"...would look cool)  Does
anyone have an idea for hooking these up?  Can I wrap some wire around a
coax to get an indication of power out?  What type of circuit can i
throw together to make this work?  -Gerry


From [e-mail] Thu Jan 02 17:54:08 1997
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From: "Ron Sibbitt" <[e-mail]>
Newsgroups: rec.radio.amateur.boatanchors,rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.swap
Subject: Need Specs on RCA 6293 Tubes...
Date: 30 Dec 1996 05:50:16 GMT
Organization: A.R.S. N8LMT
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Hi i have a pair of RCA 6293 tubes (new in
the box), they look exactly like 6146B tubes !!
but i can't find any info on them, is there an
'online tube manual' anywhere on the net ???
any info appreciated....
73,

--
Ron Sibbitt               [e-mail]
Croswell, MI 48422


From [e-mail] Thu Jan 02 17:54:10 1997
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From: [e-mail] (Wes Stewart)
Newsgroups: rec.antiques.radio+phono,rec.audio.tubes,rec.radio.amateur.boatanchors,rec.radio.amateur.homebrew
Subject: Re: What are tiny tubes?
Date: Mon, 30 Dec 1996 06:05:42 LOCAL
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>Steve McAllister wrote:
>>
>> I'm fairly new to working with vacuum tube radios.  Recently, I bought
>> box of tubes to use and there were about 60-70 tiny little tubes --
>> about 5/16 - 3/8" in diameter and about 1 - 1 1/4" long.  Some had
>> regular pins coming off of the bottom, but most have insulated wire,
>> about an inclh long.  Some of the numbers are:  JG-6021, JG-6111,
>> AF-5840, JG-5896, 5641, JHS-5977, AF-5636, ...
>>
>> Are these "pencil tubes"?  What were these little guys used for?
>> Portable electronics?    Do they have any practical use now?
>>
>> Thanks and happy new year!
>> Steve

The first air-to-air missile, the Falcon, was full of them. They were held
onto circuit boards with springy metal clips (similar to large fuse clips) and

hard-wired in.

N7WS




From [e-mail] Thu Jan 02 17:54:11 1997
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From: [e-mail] (WD5HMM)
Newsgroups: rec.radio.amateur.homebrew
Subject: Headset mic
Date: 30 Dec 1996 07:11:42 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 copy of article in Jan 93 QST on building headset mic.
Can anyone help please?
Jim , N5QL ex WD5HMM
PO  Box 333
Cleburne, TX 76033
[e-mail]


From [e-mail] Thu Jan 02 17:54:13 1997
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From: [e-mail] (Blake Bowers)
Newsgroups: rec.radio.amateur.misc,rec.radio.amateur.digital.misc,rec.radio.amateur.policy,rec.radio.amateur.homebrew,rec.radio.scanner,rec.radio.shortwave,aus.radio.amateur.misc,aus.radio.amateur.digital
Subject: Re: The Worst Ham page
Date: Mon, 30 Dec 1996 07:29:27 GMT
Organization: Altopia Corp. - Affordable Usenet Access - http://www.alt.net
Lines: 18
Message-ID: <5a7j8f$[e-mail]>
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[e-mail] (Casey) wrote:

>On Sun, 29 Dec 1996 10:06:13 -0500, Burt Fisher <[e-mail]>
>wrote:

>>Please visit my World Wide Web Site, you have never seen a page like it.
>>You will see:
>>

>Stop wasting bandspace with your sophmoric garbage. Grow up.

I visited the page, and found it to be a very well made page,
interesting, and informative.

Not sure why you have such a problem, unless of course you had gotten
worked up into a frenzy of anticipation about seeing a naked chic!




From [e-mail] Thu Jan 02 17:54:13 1997
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From: [e-mail] (Blake Bowers)
Newsgroups: rec.radio.amateur.misc,rec.radio.amateur.digital.misc,rec.radio.amateur.policy,rec.radio.amateur.homebrew,rec.radio.scanner,rec.radio.shortwave,aus.radio.amateur.misc,aus.radio.amateur.digital
Subject: Re: The Worst Ham page
Date: Mon, 30 Dec 1996 07:30:36 GMT
Organization: Altopia Corp. - Affordable Usenet Access - http://www.alt.net
Lines: 16
Message-ID: <5a7jak$[e-mail]>
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Burt Fisher <[e-mail]> wrote:

>Please visit my World Wide Web Site, you have never seen a page like it.
>You will see:

Burt,

        I went there.  I saw it.  I liked it.


Good job.   And yes, I had figured out what the naked chic would be,
far in advance of clicking on the icon.

Have a great day.




From [e-mail] Thu Jan 02 17:54:14 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!node2.frontiernet.net!usenet.logical.net!dciteleport.com!worldnet.att.net!feed1.news.erols.com!news-xfer.netaxs.com!news.voicenet.com!news
From: [e-mail] (Jim)
Newsgroups: rec.radio.amateur.homebrew
Subject: WTB AirDux 195-1or2 Pi network
Date: Mon, 30 Dec 1996 10:24:58 GMT
Organization: Voicenet - Internet Access - [phone]
Lines: 7
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Reply-To: [e-mail]
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X-Newsreader: Forte Free Agent 1.0.82

I am in search of an AirDux 195-1 or -2 Pi network for hombrewing
amplifiers. I have one that is missing some turns that could be
repaired but i would prefer to have a whole one. They were also under
other names such as Illumitronics 195-1 or -2 and B&W 195-1 or -2
If you have one of these please email me with price.
Thanks Jim



From [e-mail] Thu Jan 02 17:54:15 1997
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From: Michael <[e-mail]>
Newsgroups: rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.amateur.boatanchors,rec.radio.swap
Subject: Re: Kneed a Couple Knobs...
Date: 30 Dec 1996 11:34:29 GMT
Organization: AT&T WorldNet Services
Lines: 6
Message-ID: <5a89c5$[e-mail]>
References: <5a6siq$[e-mail]>
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Hello
  I think I might have just the knobs you are looking for they would be
great for a tuner.I hope I can find them,let me know if you still need 2
knobs..
                                                 Mike WB2GLW



From [e-mail] Thu Jan 02 17:54:16 1997
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From: [e-mail] (Gordon Symonds)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re:What Are These Tiny Tubes?
Date: 30 Dec 1996 13:02:41 GMT
Organization: The National Capital FreeNet
Lines: 15
Message-ID: <5a8ehh$[e-mail]>
Reply-To: [e-mail] (Gordon Symonds)
NNTP-Posting-Host: freenet5.carleton.ca
X-Given-Sender: [e-mail] (Gordon Symonds)


The ARC-21 Automatic Direction Finder receiver (made by Aircraft Radio
Corp) used between 10 and 20 of these subminiature tubes.  This set was
designed in the late '50s, and I know some of them still to be in use.
It is beautifully designed, and I use one as my regular BCB receiver
(it covers about 300 kHz to 1.8 MHz in 4 bands).

The push-pull drivers for the loop antenna are also subminiature power
pentodes (I think the number is 5906), and they operate  at about 6 watts
dissipation (6V @ 500 ma for the filaments, 120V@30 ma plate idle).
Needless to say, they go gassy quite regularly!

These tubes are a fallout from the WWII effort on proximity fuzes.




From [e-mail] Thu Jan 02 17:54:18 1997
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From: "L.Mark Pilant" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: QST View - A Review
Date: Mon, 30 Dec 1996 09:49:08 -0500
Organization: Digital Equipment Corporation
Lines: 47
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
Reply-To: [e-mail]
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Ian White, G3SEK wrote:

> It should now be clear to the sender of an earlier message that the
> whole text is indexed and fully searchable, and is not simply scanned-in
> pages. Only the diagrams are scanned-in, and are accessible by clicking
> on the references in the text. If you choose to print a selected
> article, all the diagrams and photographs are automatically included,
> each on its own  page.

Ian, while this is probably true for the yearly QST/QEX/NCJ CDs, the
QST View multi-year sets are ALL scanned.  Someone (and I thank them)
spent considerable time creating the index of article, column, author,
etc.

> What disappointed me about the 1995 CD-ROM was that it makes no use of
> the Classified Index which appears in the December issue. It's there, of
> course, but all the index entries are "dead" - you can look but you
> can't click to jump directly to an identified article. Worse still, the
> Index only gives month and page numbers, and there's no way to jump
> directly to a page number. (Mark: is this the same in the new QST sets?)

There isn't any way to directly go to a particular page, but there is
an indirect way.  For the "Article" you specify "*issue".  This will
cause QST View to locate a special entry which pulls all pages for an
issue except the covers.  Once the issue is loaded, you can use the
"Page" pull-down menu to go to a specific page.  (Page 3 is usually the
table of contents, and off you go from there :-)

If you select a multi-page article, the page numbering is relative to
the start of the article, not the issue.  For example, page 1, 2, and
3 of the article may have appeared on pages 74, 75, and 76 of the issue.
QST View only allows you to reference 1, 2, or 3.

> Not if you already have the relevant QSTs and the space to store them.
> For everyone else they're well worth considering.

The CDs certainly do save space.  They also allow you to purchase the
back issues in 5 year blocks; rather than having to buy the entire set
on micro-fiche or try and locate original copies.

However, it is worth point out again, the QST View CD sets to not allow
you to search articles.  All you can do is search the bibliographic
information (title, author, etc.)

73

- Mark  N1VQW


From [e-mail] Thu Jan 02 17:54:20 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!news.sgi.com!howland.erols.net!cliffs.rs.itd.umich.edu!newsxfer2.itd.umich.edu!uunet!not-for-mail
From: Burt Fisher <[e-mail]>
Newsgroups: rec.radio.amateur.misc,rec.radio.amateur.digital.misc,rec.radio.amateur.policy,rec.radio.amateur.homebrew,rec.radio.scanner,rec.radio.shortwave,aus.radio.amateur.misc,aus.radio.amateur.digital
Subject: Re: The Worst Ham page
Date: Mon, 30 Dec 1996 10:48:11 -0500
Organization: The Anti fats
Lines: 15
Message-ID: <[e-mail]>
References: <59pfq4$[e-mail]> <59pq6i$[e-mail]> <5a5cfs$[e-mail]> <[e-mail]> <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: 70.ccsnet.com
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.0Gold (Win95; I)
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Casey wrote:

> Stop wasting bandspace with your sophmoric garbage. Grow up.

Contests and NTS traffic of course are fsr more worthy?

#================#===================================================#
|  Burt Fisher   |  Teacher of video, broadcasting and electronics   |
| Amateur call   |         South Dennis, Ma. (Cape Cod)              |
|    K1OIK       |     http://www.geocities.com/WallStreet/5169      |
#================#===================================================#
|This message was posted from home            [e-mail]       |
#====================================================================#
If you try to milk too much, you won't get a drop
Samantha Fisher


From [e-mail] Thu Jan 02 17:54:22 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!howland.erols.net!news.bbnplanet.com!cam-news-hub1.bbnplanet.com!uunet!not-for-mail
From: Burt Fisher <[e-mail]>
Newsgroups: rec.radio.amateur.misc,rec.radio.amateur.digital.misc,rec.radio.amateur.policy,rec.radio.amateur.homebrew,rec.radio.scanner,rec.radio.shortwave,aus.radio.amateur.misc,aus.radio.amateur.digital
Subject: Re: The Worst Ham page
Date: Mon, 30 Dec 1996 10:49:33 -0500
Organization: The Anti fats
Lines: 16
Message-ID: <[e-mail]>
References: <59pfq4$[e-mail]> <59pq6i$[e-mail]> <5a5cfs$[e-mail]> <[e-mail]> <[e-mail]> <01bbf5fd$57b60be0$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: 70.ccsnet.com
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.0Gold (Win95; I)
Xref: news1.epix.net rec.radio.amateur.misc:122234 rec.radio.amateur.digital.misc:20972 rec.radio.amateur.policy:44977 rec.radio.amateur.homebrew:22591 rec.radio.scanner:74539 rec.radio.shortwave:91535 aus.radio.amateur.misc:1716 aus.radio.amateur.digital:329

Chad Sims wrote:

>         I liked his webpage. I found a lot of humor in it. And I found your
comments rude and un-called for.

Thank you for your comments.
It is meant to be entertaining, you do not have to agree with my views.

#================#===================================================#
|  Burt Fisher   |  Teacher of video, broadcasting and electronics   |
| Amateur call   |         South Dennis, Ma. (Cape Cod)              |
|    K1OIK       |     http://www.geocities.com/WallStreet/5169      |
#================#===================================================#
|This message was posted from home            [e-mail]       |
#====================================================================#
If you try to milk too much, you won't get a drop
Samantha Fisher


From [e-mail] Thu Jan 02 17:54:23 1997
Path: news1.epix.net!news3.epix.net!uunet!not-for-mail
From: Burt Fisher <[e-mail]>
Newsgroups: rec.radio.amateur.misc,rec.radio.amateur.digital.misc,rec.radio.amateur.policy,rec.radio.amateur.homebrew,rec.radio.scanner,rec.radio.shortwave,aus.radio.amateur.misc,aus.radio.amateur.digital
Subject: Re: The Worst Ham page
Date: Mon, 30 Dec 1996 10:51:32 -0500
Organization: The Anti fats
Lines: 24
Message-ID: <[e-mail]>
References: <59pfq4$[e-mail]> <59pq6i$[e-mail]> <5a5cfs$[e-mail]> <[e-mail]> <[e-mail]> <01bbf5fd$57b60be0$[e-mail]> <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: 70.ccsnet.com
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.0Gold (Win95; I)
Xref: news1.epix.net rec.radio.amateur.misc:122232 rec.radio.amateur.digital.misc:20970 rec.radio.amateur.policy:44975 rec.radio.amateur.homebrew:22589 rec.radio.scanner:74537 rec.radio.shortwave:91533 aus.radio.amateur.misc:1714 aus.radio.amateur.digital:327

Casey wrote:

> Are you Burts Parrot? I bet you sit on his shoulder and go "awwk, your
> right Burt"! Awwk, your right Burt!"

If you are into parrots have you listened to contests?

CQ CONTEST, CQ CONTEST, CQ CONTEST, CQ CONTEST, CQ CONTEST, CQ CONTEST,
CQ CONTEST, CQ CONTEST, CQ CONTEST, CQ CONTEST, CQ CONTEST, CQ CONTEST,
CQ CONTEST, CQ CONTEST, CQ CONTEST, CQ CONTEST, CQ CONTEST, CQ CONTEST.
59, please repeat all hi hi,  59, please repeat all hi hi,
59, please repeat all hi hi,  59, please repeat all hi hi,
59, please repeat all hi hi,  59, please repeat all hi hi,


#================#===================================================#
|  Burt Fisher   |  Teacher of video, broadcasting and electronics   |
| Amateur call   |         South Dennis, Ma. (Cape Cod)              |
|    K1OIK       |     http://www.geocities.com/WallStreet/5169      |
#================#===================================================#
|This message was posted from home            [e-mail]       |
#====================================================================#
If you try to milk too much, you won't get a drop
Samantha Fisher


From [e-mail] Thu Jan 02 17:54:24 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!howland.erols.net!cliffs.rs.itd.umich.edu!newsxfer2.itd.umich.edu!uunet!not-for-mail
From: Burt Fisher <[e-mail]>
Newsgroups: rec.radio.amateur.misc,rec.radio.amateur.digital.misc,rec.radio.amateur.policy,rec.radio.amateur.homebrew,rec.radio.scanner,rec.radio.shortwave,aus.radio.amateur.misc,aus.radio.amateur.digital
Subject: Re: The Worst Ham page
Date: Mon, 30 Dec 1996 10:54:09 -0500
Organization: The Anti fats
Lines: 22
Message-ID: <[e-mail]>
References: <59pfq4$[e-mail]> <59pq6i$[e-mail]> <5a5cfs$[e-mail]> <[e-mail]> <[e-mail]> <5a7j8f$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: 70.ccsnet.com
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.0Gold (Win95; I)
Xref: news1.epix.net rec.radio.amateur.misc:122235 rec.radio.amateur.digital.misc:20973 rec.radio.amateur.policy:44978 rec.radio.amateur.homebrew:22592 rec.radio.scanner:74540 rec.radio.shortwave:91536 aus.radio.amateur.misc:1717 aus.radio.amateur.digital:330

Blake Bowers wrote:
>
> I visited the page, and found it to be a very well made page,
> interesting, and informative.

Interesting is my goal, thanks for your comments.

> Not sure why you have such a problem, unless of course you had gotten
> worked up into a frenzy of anticipation about seeing a naked chic!

Not only is the chic naked but the human is the picture has no cloth
you can see on her body, right?

#================#===================================================#
|  Burt Fisher   |  Teacher of video, broadcasting and electronics   |
| Amateur call   |         South Dennis, Ma. (Cape Cod)              |
|    K1OIK       |     http://www.geocities.com/WallStreet/5169      |
#================#===================================================#
|This message was posted from home            [e-mail]       |
#====================================================================#
If you try to milk too much, you won't get a drop
Samantha Fisher


From [e-mail] Thu Jan 02 17:54:27 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!snunews.snu.ac.kr!newsfeed.kreonet.re.kr!newsfeed.dacom.co.kr!melba.bby.com.au!news.mira.net.au!news.vbc.net!vbcnet-west!knews.uk0.vbc.net!btnet!netcom.net.uk!news-lond.gsl.net!news.gsl.net!news-peer.gsl.net!news.gsl.net!howland.erols.net!news.bbnplanet.com!cam-news-hub1.bbnplanet.com!uunet!not-for-mail
From: Burt Fisher <[e-mail]>
Newsgroups: rec.radio.amateur.misc,rec.radio.amateur.digital.misc,rec.radio.amateur.policy,rec.radio.amateur.homebrew,rec.radio.scanner,rec.radio.shortwave,aus.radio.amateur.misc,aus.radio.amateur.digital
Subject: Re: The Worst Ham page
Date: Mon, 30 Dec 1996 10:55:13 -0500
Organization: The Anti fats
Lines: 19
Message-ID: <[e-mail]>
References: <59pfq4$[e-mail]> <59pq6i$[e-mail]> <5a5cfs$[e-mail]> <[e-mail]> <5a7jak$[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: 70.ccsnet.com
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.0Gold (Win95; I)
Xref: news1.epix.net rec.radio.amateur.misc:122237 rec.radio.amateur.digital.misc:20974 rec.radio.amateur.policy:44979 rec.radio.amateur.homebrew:22593 rec.radio.scanner:74541 rec.radio.shortwave:91537 aus.radio.amateur.misc:1718 aus.radio.amateur.digital:331

Blake Bowers wrote:
>
>
>         I went there.  I saw it.  I liked it.
>
> Good job.   And yes, I had figured out what the naked chic would be,
> far in advance of clicking on the icon.

Thank you for having a sense of humor.

#================#===================================================#
|  Burt Fisher   |  Teacher of video, broadcasting and electronics   |
| Amateur call   |         South Dennis, Ma. (Cape Cod)              |
|    K1OIK       |     http://www.geocities.com/WallStreet/5169      |
#================#===================================================#
|This message was posted from home            [e-mail]       |
#====================================================================#
If you try to milk too much, you won't get a drop
Samantha Fisher


From [e-mail] Thu Jan 02 17:54:28 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-out.microserve.net!news-in.microserve.net!news-xfer.netaxs.com!insync!uunet!in2.uu.net!204.97.248.3!news.ime.net!not-for-mail
From: "David Lawson" <[e-mail]>
Newsgroups: rec.antiques.radio+phono,rec.audio.tubes,rec.radio.amateur.boatanchors,rec.radio.amateur.homebrew
Subject: Re: What are tiny tubes?
Date: 30 Dec 1996 18:42:18 GMT
Organization: Digital Designs
Lines: 20
Message-ID: <01bbf680$d3c88040$[e-mail]>
References: <5a1k1c$[e-mail]> <[e-mail]> <[e-mail]>
NNTP-Posting-Host: port-76.ime.net
X-Newsreader: Microsoft Internet News 4.70.1155
Xref: news1.epix.net rec.antiques.radio+phono:34463 rec.audio.tubes:20446 rec.radio.amateur.boatanchors:1377 rec.radio.amateur.homebrew:22595



Wes Stewart <[e-mail]> wrote in article
<[e-mail]>...
>
> >Steve McAllister wrote:
> >>
> >> I'm fairly new to working with vacuum tube radios.  Recently, I bought
> >> box of tubes to use and there were about 60-70 tiny little tubes --
> >> about 5/16 - 3/8" in diameter and about 1 - 1 1/4" long.  Some had
> >> regular pins coming off of the bottom, but most have insulated wire,
> >> about an inclh long.  Some of the numbers are:  JG-6021, JG-6111,
> >> AF-5840, JG-5896, 5641, JHS-5977, AF-5636, ...
> >>
> >> Are these "pencil tubes"?  What were these little guys used for?
> >> Portable electronics?    Do they have any practical use now?
> >>
> >> Thanks and happy new year!
> >> Steve
can you imagine a pentium made with these?


From [e-mail] Thu Jan 02 17:54:29 1997
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!usenet.eel.ufl.edu!news-peer.gsl.net!news.gsl.net!news-paris.gsl.net!news.gsl.net!rain.fr!wanadoo.fr!usenet
From: <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: JST 135 - JRC  - HELP
Date: 30 Dec 1996 19:16:10 GMT
Organization: France Telecom Interactive
Lines: 12
Message-ID: <01bbf685$c64ae160$[e-mail]>
NNTP-Posting-Host: yellow-dij-55.wanadoo.fr
X-Newsreader: Microsoft Internet News 4.70.1155

JST 135 -JRC-
Is there somebody who knows the way of changing this tranceiver in general
coverage transmitter ?

--
Jacques RUTY
17 rue de Futigny
71330 ST GERMAIN DU BOIS
FRANCE

Email: [e-mail]
Packet: F1GTM @ F1TIV.FBFC.FRA.EU


From [e-mail] Thu Jan 02 17:54:30 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!news.sprintlink.net!news-peer.sprintlink.net!news.sprintlink.net!news-pull.sprintlink.net!news.sprintlink.net!news-fw-12.sprintlink.net!news.onramp.net!usenet
From: Clif <[e-mail]>
Newsgroups: rec.radio.amateur.boatanchors,rec.radio.amateur.homebrew,rec.radio.amateur.misc
Subject: Collins, Heathkit, Drake Manuals
Date: Mon, 30 Dec 1996 13:39:13 -0600
Organization: OnRamp Technologies; ISP;  Dallas/Ft Worth/Houston, TX USA
Lines: 8
Message-ID: <[e-mail]>
NNTP-Posting-Host: lbj55.onramp.net
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
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Xref: news1.epix.net rec.radio.amateur.boatanchors:1378 rec.radio.amateur.homebrew:22597 rec.radio.amateur.misc:122288

I am in the process of cleaning out my shop and have several (100+)
owner/operator/service manuals for various pieces of Collins, Heathkit,
and Drake gear. If you have any specific needs email me and I will
check. Also in the pile is a Blue 3ring binder w/Collins Emblem and
contains dealer pricing and brochures for the early 60's to about 71
on Collins equipment (make offer)

email to [e-mail]


From [e-mail] Thu Jan 02 17:54:32 1997
Path: news1.epix.net!news3.epix.net!uunet!in1.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-stk-3.sprintlink.net!news.smartlink.net!infosoftpub.com!george.tamayo
From: [e-mail] (George Tamayo)
Newsgroups: rec.radio.amateur.homebrew
Subject: Please read!
Date: Mon, 30 Dec 1996 21:00:00 (PST)
Organization: Infosoft Publishing Company (805-288-1414)
Lines: 63
Message-ID: <[e-mail]>
Reply-To: [e-mail] (George Tamayo)
NNTP-Posting-Host: pm115-55.smartlink.net
X-mailer: PowrMAIL for PowerBBS Ver. 1.5 (Beta 6b) (rev. 1.00d)

Fellow Amateurs:  Please read the first two paragraphs!

[e-mail] (PAT CLAWSON) said to ALL in comp.bbs.misc:

Boardwatch may have abandoned the BBS sysop, but TeleGrafix is still standing
strong with them.  However, we think that BBS systems must become
Internet-connected if they are to survive in a Webbed world.

First, we need to quit calling these online systems by the moniker "BBS."
The term has come to reflect something on the order of ham radio -- low-rent
communications run by amateurs.  That may accurately reflect some BBS
systems, but we've found that many sysops run very professional online
businesses.

Second, we need to start emphasizing the Power of Telnet and talk about
Telnet Sites, not BBS systems.  A telnettable BBS or legacy system can do
many things the Web can't.  Most of the computer industry and public has
been Web-washed (brainwashed) by all the press hype.  They think the Web
is all there is to the Internet/online experience. Just a couple of days
ago, I was talking to the Internet reporter for one of America's most
prestigious newspapers.  He had never even heard of Telnet, didn't have a
clue what it was -- and his news reports influence literally millions of
Americans. BBS sysops and BBS system manufacturers need to refocus their
efforts, and begin producing tools and content that take advantage of the
Power of Telnet.

Third, Telnet Site operators (such as BBS sysops) must professionalize the
look and feel of their systems.  Most sysops make little investment in
quality graphics for their systems.  In a glitzy Web world, it is little
wonder that the public is turned off by ANSI BBS systems no matter how if
the content on them is of high quality. We constantly hear BBS sysops
complain about having to pay what are very modest sums of money for
RIPscrip graphics -- but the people running Web sites don't think twice
about investing thousands of dollars for a fabulous look.

Despite all the flack we take from BBS sysops, we continue to support
their efforts -- and we always will.  But BBS sysops have to change with
the times, and they have to be willing to invest to upgrade their systems
to compete with (or complement) the Web.

On Christmas, TeleGrafix released the first multimedia Telnet browsers.
RIPtel Visual Telnet is available now from our Web site at
www.telegrafix.com.  This is a huge step forward for the Internet, and it
represents a salvation for BBS sysops by placing Telnet graphically on a
higher level than the Web.

The serious professional operators will get on board the Visual Telnet
train, and they will live to see a brighter day.

Pat Clawson
TeleGrafix Communications Inc.
Winchester, VA

Web: www.telegrafix.com

---
George M. Tamayo - WD6EJO
South Mountain Online
---
 * PowerAccess 1.50 No, I'm NOT an Extended Character.






From [e-mail] Thu Jan 02 17:54:33 1997
Path: news1.epix.net!news3.epix.net!uunet!in3.uu.net!206.229.87.25!news.sprintlink.net!news-peer.sprintlink.net!news.sprintlink.net!news-pull.sprintlink.net!news.sprintlink.net!news-dc-9.sprintlink.net!news.azstarnet.com!pfriedr!pfriedr
From: [e-mail] (pfriedr)
Newsgroups: rec.radio.amateur.homebrew
Subject: Coherer...What is it?
Date: Mon, 30 Dec 1996 22:13:58 LOCAL
Organization: Starnet
Lines: 8
Message-ID: <[e-mail]>
NNTP-Posting-Host: usr16ip14.azstarnet.com
X-Newsreader: Trumpet for Windows [Version 1.0 Rev B final beta #4]

I wonder if one of the old timers out there could tell me something about
"Coherers"---what were they exactly and how did they work?

I get the impression that they functioned as detectors, but I'm puzzled about
references to "tappers" and other key-wound mechanisms designed to agitate
them.

Thanks in advance.


From [e-mail] Thu Jan 02 17:54:35 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!howland.erols.net!newsfeed.internetmci.com!news.intersource.com!news
From: "Ray Hodgkiss, N9YNG" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: PLEASE READ! A thought about keeping CW....
Date: Mon, 30 Dec 1996 18:12:11 -0500
Organization: InterSource, Bloomington, IN
Lines: 34
Message-ID: <[e-mail]>
NNTP-Posting-Host: xyplex1-1-6.kiva.net
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.01 (Win95; I)

I know this may seem not "proper" to start a debate in this newsgroup
about keeping CW as a requirement.  However, I have a thought about this
topic that pertains to homebrewing.

In a nutshell:

        What if people were given a choice about either taking a morse test, or
homebrewing a rig, a piece of equipment, or something else other than an
antenna?  So maybe somebody would have to homebrew a transverter for a 5
wpm code test, a HF rig for a 13 wpm code test, and an amp for a 20 wpm
code test.  VEs can oversee and offer minor assistance, maybe over a few
weekends. (I know that the ITU requires 5 wpm for HF.)

The benefits:

        It would bolster the entire homebrewing aspect of amateur radio. More
kits and literature about homebrewing would appear on the market. It
would also act as a more effective filter, not becasue it would prevent
people from getting their licenses, rather that the assistance from VEs
on the projects (to also prevent cheating) would allow the canidate and
the ham radio community to get to know each other a lot better, and
hence "shame" people into good operating practices.

The drawbacks:

        It would involve a lot more work for everybody, VE and the person
trying to get a license.  However, I believe that the benefits outweigh
the drawbacks.

Please, all comments are appreciated!

73 de N9YNG

Ray Hodgkiss


From [e-mail] Thu Jan 02 17:54:36 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!128.250.1.21!munnari.OZ.AU!ihnp4.ucsd.edu!sdd.hp.com!col.hp.com!usenet
From: Ken Wyatt <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Icom  IC-245 alignment manual needed !!!
Date: Mon, 30 Dec 1996 16:35:27 -0800
Organization: Hewlett-Packard Co.
Lines: 39
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: kw2852.col.hp.com
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.0 (Win16; I)
To: Michael Gladu <[e-mail]>

Michael Gladu wrote:
>
> I am looking for a formal alignment prodecure for an ICOM IC-245 2M
> mobile transceiver.  The unit I am working on has a PLL / display
> problem.  Please email me at:  [e-mail] with any helpful
> information.   Thanx de N1fbz - [e-mail]

This is starting to become a FAQ!  There is nothing wrong with your
alignment.  This is a known problem with the IC-245 and IC-211 2m
radios, the sympton being, erratic display (uncontrollable or missing
segments, etc.) and lack of tuning ability from the knob.

The problem may be fixed, but is rather time consuming and delicate!
ICOM happened to use (to their infinite regret!) brass eyelets to make
connections between the top- and bottom sides of the PLL circuit board.
Now any metalurgist or chemist should know that brass eyelets and copper
circuit traces (plus humidity) will form a small voltage (a battery, of
sorts) that will eventually lead to corrosion and loss of contact
between the two metals. This is what is occuring with your radio.

The fix involves opening up the PLL module (top and bottom), being very
careful not to damage the myriad of wires connecting this module to the
rest of the radio.  The 40-pin(?) PLL IC must also be carefully removed
using solder wick and the usual ESD precautions (ICOM does not have any
more of these available).  The eyelets are obvious and must all be
removed using solder wick.  As you remove each one, replace it with a
small COPPER wire jumper and resolder. Take care that the wire ends
don't short something out! As I recall, there are maybe 20, or so, of
these eyelets; including two located under the PLL IC. Once all the
eyelets have been replaced, reinstall the PLL IC and hopefully, your
radio will be back in working order.

When my 245 had the same problem, ICOM also had me replace all the
polystyrene capacitors in the PLL module. I don't believe doing this
helped with the primary problem, however.

Good Luck!

73, Ken (WA6TTY)


From [e-mail] Thu Jan 02 17:54:37 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!gatech!arclight.uoregon.edu!feed1.news.erols.com!howland.erols.net!vixen.cso.uiuc.edu!newsfeed.internetmci.com!news.intersource.com!ansel.intersource.com!kenwells
From: Ken Wells <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: mods Kenwood TS850S
Date: Mon, 30 Dec 1996 19:53:21 -0500
Organization: InterSource, Bloomington, IN
Lines: 25
Message-ID: <[e-mail]>
References: <5a4d1i$[e-mail]>
NNTP-Posting-Host: ansel.intersource.com
Mime-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
X-Sender: [e-mail]
To: Rene Jansen <[e-mail]>
In-Reply-To: <5a4d1i$[e-mail]>


I don't know about WWW sites, but for about $12 (US) you can get a CD
called QRZ Ham Radio that has a huge number of mods in hypertext format
(windows help format)  There are several good mods for the 850 including
removing the attenuator in the AM broadcast band to improve sensitivity.
The disk also has a great callbook lookup and lots of other software.
  you can find it at your next hamfest.

Good luck.


Ken Wells - NM9P
[e-mail]


On 29 Dec 1996, Rene Jansen wrote:

> Who can tell me were to find
> some mods for my TS 850S
> on the www
>
> '73 Rene [e-mail]
>
>



From [e-mail] Thu Jan 02 17:54:38 1997
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From: [e-mail] (Sam Fant Jr.)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: mods Kenwood TS850S
Date: Tue, 31 Dec 1996 01:00:36 GMT
Organization: PSS InterNet Services, Interneting Florida and beyond 904 253 7100
Lines: 8
Message-ID: <[e-mail]>
References: <01bbf4bd$764d6300$6abf97c2@default>
NNTP-Posting-Host: dab2-23.america.com
X-Newsreader: Forte Agent .99e/32.227

"Rene Jansen" <[e-mail]> wrote:

>Who can tell me were to find
>some mods for my TS 850S
>on the www
>
>'73 Rene [e-mail]



From [e-mail] Thu Jan 02 17:54:40 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-out.microserve.net!news-in.microserve.net!news-xfer.netaxs.com!feed1.news.erols.com!howland.erols.net!cliffs.rs.itd.umich.edu!newsxfer2.itd.umich.edu!uunet!in2.uu.net!206.72.128.98!news.icix.net!news.america.com!usenet
From: [e-mail] (Sam Fant Jr.)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: mods Kenwood TS850S
Date: Tue, 31 Dec 1996 01:00:37 GMT
Organization: PSS InterNet Services, Interneting Florida and beyond 904 253 7100
Lines: 10
Message-ID: <[e-mail]>
References: <01bbf4bd$764d6300$6abf97c2@default>
NNTP-Posting-Host: dab2-23.america.com
X-Newsreader: Forte Agent .99e/32.227

"Rene Jansen" <[e-mail]> wrote:

>Who can tell me were to find
>some mods for my TS 850S
>on the www
>
>'73 Rene [e-mail]

Try This Page.
ftp://ftp.cs.buffalo.edu/pub/ham-radio/mods/


From [e-mail] Thu Jan 02 17:54:41 1997
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From: [e-mail] (Sam Fant Jr.)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: mods Kenwood TS850S
Date: Tue, 31 Dec 1996 01:00:38 GMT
Organization: PSS InterNet Services, Interneting Florida and beyond 904 253 7100
Lines: 9
Message-ID: <[e-mail]>
References: <01bbf4bd$764d6300$6abf97c2@default>
NNTP-Posting-Host: dab2-23.america.com
X-Newsreader: Forte Agent .99e/32.227

"Rene Jansen" <[e-mail]> wrote:

>Who can tell me were to find
>some mods for my TS 850S
>on the www
ftp://ftp.cs.buffalo.edu/pub/ham-radio/mods/
>
>'73 Rene [e-mail]



From [e-mail] Thu Jan 02 17:54:42 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!news-xfer.netaxs.com!newsfeeds.sol.net!uwm.edu!newsspool.doit.wisc.edu!news.doit.wisc.edu!lumkes
From: [e-mail] (John Lumkes)
Newsgroups: rec.radio.amateur.homebrew
Subject: Fixing old Reciever?
Date: 31 Dec 1996 01:29:29 GMT
Organization: College of Engineering, Univ. of Wisconsin--Madison
Lines: 16
Message-ID: <5a9q9p$[e-mail]>
References: <5a4d1i$[e-mail]> <[e-mail]>
NNTP-Posting-Host: hp-18.cae.wisc.edu

Hello,
I have an old Scott R-327 stereo reciever I am playing around with.
It works well in all modes except FM radio, where I can tune (stereo and
signal strength indicator high) but only hear the station with the volume
turned all the way up (along with a slight buzz). AM and CD input work
and sound great. If I spin the tuning dial it is louder as it goes by
a station but when I tune it is only very faint. I am treating this as
a test experiment for learning more about FM and would appreciate
where to begin. i.e., what components to check, what the probable
cause is, etc?

Thanks alot, this newsgroup is a great place to learn.

John Lumkes, AA9QP
[e-mail]



From [e-mail] Thu Jan 02 17:54:43 1997
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!usenet
From: [e-mail] (Mark Schneider)
Newsgroups: rec.radio.amateur.misc,rec.radio.amateur.digital.misc,rec.radio.amateur.policy,rec.radio.amateur.homebrew,rec.radio.scanner,rec.radio.shortwave,aus.radio.amateur.misc,aus.radio.amateur.digital
Subject: Re: The Worst Ham page
Date: Tue, 31 Dec 1996 01:53:18 GMT
Organization: UltraNet Communications, Inc.
Lines: 37
Message-ID: <[e-mail]>
References: <59pfq4$[e-mail]> <59pq6i$[e-mail]> <5a5cfs$[e-mail]> <[e-mail]> <[e-mail]>
NNTP-Posting-Host: d20.mnh.nh.ultra.net
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On Mon, 30 Dec 1996 03:36:11 GMT, [e-mail] (Casey) wrote:

>On Sun, 29 Dec 1996 10:06:13 -0500, Burt Fisher <[e-mail]>
>wrote:
>
>>Please visit my World Wide Web Site, you have never seen a page like it.
>>You will see:
>>
>>1. A naked chic
>>2. The writings of me and others on ham radio.
>>3. The warm side of K1OIK.
>>4. A test for your SVGA monitor
>>5. A picture of me and my family.
>>6. A Nazi connection in ham radio???
>>
>>
>>Burt Fisher    Teacher of video, broadcasting and electronics
>>Amateur call           South Dennis, Ma. (Cape Cod)
>>  K1OIK        If you sit on the fence, it is a pain in the butt
>>
>>               [e-mail]    [e-mail]
>>               www.geocities.com/WallStreet/5169
>Hey Marc,
> Why don't you send me your real e-mail address you coward?


'smatter bunky, upset because you lack creativity to make your own web
page?


***************************************************************
* [e-mail]                                     *

*                                                             *
* Mark Schneider, WI1W     http://www.ultranet.com/~onbelay   *
*    Manchester, NH                                           *
***************************************************************
.


From [e-mail] Thu Jan 02 17:54:45 1997
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!usenet
From: [e-mail] (Mark Schneider)
Newsgroups: rec.radio.amateur.misc,rec.radio.amateur.digital.misc,rec.radio.amateur.policy,rec.radio.amateur.homebrew,rec.radio.scanner,rec.radio.shortwave,aus.radio.amateur.misc,aus.radio.amateur.digital
Subject: Re: The Worst Ham page
Date: Tue, 31 Dec 1996 01:54:38 GMT
Organization: UltraNet Communications, Inc.
Lines: 33
Message-ID: <[e-mail]>
References: <59pfq4$[e-mail]> <59pq6i$[e-mail]> <5a5cfs$[e-mail]> <[e-mail]> <5a7jak$[e-mail]> <[e-mail]>
NNTP-Posting-Host: d20.mnh.nh.ultra.net
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On Mon, 30 Dec 1996 10:55:13 -0500, Burt Fisher <[e-mail]>
wrote:

>Blake Bowers wrote:
>>
>>
>>         I went there.  I saw it.  I liked it.
>>
>> Good job.   And yes, I had figured out what the naked chic would be,
>> far in advance of clicking on the icon.
>
>Thank you for having a sense of humor.
>
**snip**

Yeah, I had an idea about the chick, too. That's a little scary. Great
page, keep modifying it!!


Mark SCHNEIDER -- Trying to figure out what to do with all these
German traits.....hmmmmm, maybe if we just march this group of
neo-nazis and Skinheads into this little sealable room over here,
close the door, climb this ladder over here, and dump these pellets
down this pipe.........


***************************************************************
* [e-mail]                                     *

*                                                             *
* Mark Schneider, WI1W     http://www.ultranet.com/~onbelay   *
*    Manchester, NH                                           *
***************************************************************
.


From [e-mail] Thu Jan 02 17:54:46 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!sdd.hp.com!col.hp.com!news.dtc.hp.com!hpscit.sc.hp.com!rkarlqu
From: [e-mail] (Richard Karlquist)
Newsgroups: sci.electronics.design,sci.electronics.misc,rec.radio.swap,rec.radio.amateur.homebrew
Subject: Re: Rigorous analysis of Twin-T Filter
Date: 31 Dec 1996 02:49:21 GMT
Organization: Hewlett-Packard
Lines: 34
Message-ID: <5a9uvh$[e-mail]>
References: <5a75jg$[e-mail]>
NNTP-Posting-Host: mentor23.scd.hp.com
Xref: news1.epix.net sci.electronics.design:29014 sci.electronics.misc:19347 rec.radio.swap:102020 rec.radio.amateur.homebrew:22611

In article <5a75jg$[e-mail]>,
lbliao <[e-mail]> wrote:
>I am looking for any book that does the rigorous analysis of the twin T
>filter. Preferably, the book or paper should discuss all the modes of
>operation of the filter including those when the zeros are in the right
>half plane. Information on other filters that are either notch or peaking
>at a certain frequency with better performance or lower parts count, or
>allowing simple adjustment of the frequency is also welcome.
>
>
>Thanks a lot!
>lbliao
>
>

There was a paper in the Proceedings of the IRE in the 1950's that analyzed
all the permutations of the Bridged-T network.  The title was something
to the effect of "An analysis of the bridged-T network".  I suggest you
start with that.  I have a copy somewhere.  If I can, I'll post the exact
citation.  The bridged-T network can do most if not all of what the twin T wil
l do.

Another thing to keep in mind is that both of these networks are reduced
(i.e. unbalanced) forms of balanced lattices.  The easiest thing to do
is design whatever you want as a balanced lattice network first, then use
lattice network theorems to unbalance and reduce it.  You can find info
on balanced lattice networks in any advanced network theory book over 30
years old.  These techniques, though largely unknown now, are extremely
powerful.  You should be aware that you cannot realize a real right half
plane zero in an unbalanced network like a twin T or bridged T.  Only a
balanced lattice (or half lattice) can do that.  Other than that, you can
do just about anything you want quite easily, once you master the technique.

Rick Karlquist N6RK
[e-mail]


From [e-mail] Thu Jan 02 17:54:47 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!news-peer.gsl.net!news.gsl.net!portc01.blue.aol.com!audrey01.news.aol.com!not-for-mail
From: [e-mail] (BCSpain)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: PLEASE READ! A thought about keeping CW....
Date: 31 Dec 1996 03:28:48 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]


In a message dated 12-30-96 Ray Hodgkiss, N9YNG, wrote:


>What if people were given a choice about either taking a morse test, or
>homebrewing a rig, a piece of equipment, or something else other than an
>antenna?

I agree that the test should reflect the current state of the hobby. Most
of the guys will talk about tradition and using cw as a filter to keep the
riffraff out but a more techical test that makes people actually learn
something of electronics and operating procedures instead of memorizing
the answers would be a much better filter. Then, you would have people who
are genuinely interested in radio, and operating a radio instead of having
access to a "glorified" CB.

73's
Bryan WB5YIW


From [e-mail] Thu Jan 02 17:54:48 1997
Path: news1.epix.net!news3.epix.net!uunet!in3.uu.net!128.250.1.21!munnari.OZ.AU!ihnp4.ucsd.edu!news1.ucsd.edu!news-mail-gateway
From: [e-mail] (Peter L. Williamson)
Newsgroups: rec.radio.amateur.homebrew
Subject: Help to identify Gasfets
Date: 31 Dec 96 05:37:28 GMT
Organization: ucsd usenet gateway
Lines: 5
Message-ID: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: mail.ucsd.edu
Originator: [e-mail]

Hello,   I have a 1.7 GHz Lna to repair for a friend which has two
faulty Gasfets (Hemt?).  They are in a ceramic package and are marked
353 on the case top.
Can anyone identify these for me?
Tnx in advance Peter VK4AWP.


From [e-mail] Thu Jan 02 17:54:49 1997
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From: [e-mail] (Rog42)
Newsgroups: rec.radio.amateur.homebrew
Subject: F.S. - Tubes and related items...
Date: 31 Dec 1996 07:50:32 GMT
Organization: AOL http://www.aol.com
Lines: 7
Message-ID: <[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

FOR SALE:  Tubes, test equipment, radios including Hallicrafters,
Hammarlund, and Philco. Other older tube type radios and radio related
publications.  Schematics for many radios just $1.  Tube Manuals, Tube
Substitution books, Service Manuals, QST magazines, much more from the
30's, 40's, 50's, 60's.  Now over 1500 different tube types in stock -
E-mail [e-mail] and ask for my latest offerings on RADIO list  -
#1224-T.


From [e-mail] Thu Jan 02 17:54:50 1997
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!voskovec.radio.cz!news.cesnet.cz!01-newsfeed.univie.ac.at!02-newsfeed.univie.ac.at!newsfeed.de.ibm.net!newsfeed.uk.ibm.net!news.ibm.net.il!arclight.uoregon.edu!mr.net!newsfeeds.sol.net!newspump.sol.net!howland.erols.net!feed1.news.erols.com!tezcat!gail.ripco.com!news.wwa.com!news
From: [e-mail] (M Simon)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: PLEASE READ! A thought about keeping CW....
Date: Tue, 31 Dec 1996 07:57:29 GMT
Organization: Space-Time Productions
Lines: 34
Message-ID: <5aah1b$[e-mail]>
References: <[e-mail]> <[e-mail]>
NNTP-Posting-Host: 206.230.95.11
X-Newsreader: Forte Free Agent 1.0.82

If there are not enough hams of whatever capability there will
be no more ham bands.

We don't want filters. We want attractors.

Simon
--------------------------------------------------------------
[e-mail] (BCSpain) wrote:

>
>In a message dated 12-30-96 Ray Hodgkiss, N9YNG, wrote:


>>What if people were given a choice about either taking a morse test, or
>>homebrewing a rig, a piece of equipment, or something else other than an
>>antenna?

>I agree that the test should reflect the current state of the hobby. Most
>of the guys will talk about tradition and using cw as a filter to keep the
>riffraff out but a more techical test that makes people actually learn
>something of electronics and operating procedures instead of memorizing
>the answers would be a much better filter. Then, you would have people who
>are genuinely interested in radio, and operating a radio instead of having
>access to a "glorified" CB.

>73's
>Bryan WB5YIW

In the end people get the government they deserve.

Read "The Weapon Shops of Isher" by A.E. vanVogt

Simon



From [e-mail] Thu Jan 02 17:54:52 1997
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From: Steve Rohrer <[e-mail]>
Newsgroups: rec.radio.amateur.boatanchors,rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.swap
Subject: Re: Need Specs on RCA 6293 Tubes...
Date: Tue, 31 Dec 1996 01:49:07 -0800
Organization: Sprynet News Service
Lines: 28
Message-ID: <[e-mail]>
References: <01bbf614$bf51ab80$5d6794ce@n8lmt>
Reply-To: [e-mail]
NNTP-Posting-Host: dd35-148.compuserve.com
Mime-Version: 1.0
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Xref: news1.epix.net rec.radio.amateur.boatanchors:1400 rec.radio.amateur.equipment:45538 rec.radio.amateur.homebrew:22610 rec.radio.swap:102013

Ron Sibbitt wrote:
>
> Hi i have a pair of RCA 6293 tubes (new in
> the box), they look exactly like 6146B tubes !!
> but i can't find any info on them, is there an
> 'online tube manual' anywhere on the net ???
> any info appreciated....
> 73,

Ron,
  The 6293 is essentially a 6146 intended for "pulse-modulator" (i.e.
radar) service.
As per RCA in 4-63, Typical operation is:
DC Plate Supply Voltage         3000 Volts (!)
DC Grid-No.2 Supply Voltage      300 Volts
DC Grid-No.1 Supply Voltage     -175 Volts
Peak Positive Grid-No.1 Voltage   65 Volts
Plate Current:
        Peak                     1.5 Amp (!)
        Average                  0.015 Amp
DC Grid-No.2 Current             0.004 Amp
DC Grid-No.1 Current             0.0025 Amp
Load Resistance, 100 watts       1500 Ohms

Naturally, these ratings apply to a very short duty cycle.  Pin
connections, and filament voltage appear to be identical to a 6146.

73 - Steve KA4RSZ


From [e-mail] Thu Jan 02 17:54:54 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!cliffs.rs.itd.umich.edu!newsxfer2.itd.umich.edu!uunet!in1.uu.net!205.228.248.26!news.vcnet.com!port27.vcnet.com!user
From: [e-mail] (R. L. Measures )
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: Tue, 31 Dec 1996 02:44:07 -0800
Organization: Internet Access of Ventura County
Lines: 70
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
NNTP-Posting-Host: port18.vcnet.com

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

> In article <[e-mail]>,
> [e-mail] (R. L. Measures ) writes:
>
> >It was not a hypothetical question.  The first time I worked on one of
> >these amplifiers, I noticed that 3-500Z filament was so bright I could
> >read a newspaper with the light from it.  This was no fluke, Tom.  At the
> >time, the line voltage measured 240v with my John Fluke DMM.
>
>
> Rich is correct here IF (big if) his information is accurate. I've seen
> this problem in some PA's, but I have never measured (no pun intended) a
> Command PA or a Henry.
>
> I can't speak for Richard's claims in those cases, but if it is true the
> manufacturers should be VERY concerned about correcting that problem.
>
> >You are only guessing until YOU make the measurements, Tom.  I made the
> >measurements.  I wrote about them in "The Nearly Perfect Amplifier" in
> the
> >January 1994 issue of QST magazine.
>
> I do wonder where Richard got the formula [E1/E2]^23.5.  Is the answer in
> hours, percent, seconds, or ratio? Where does it come from?
>
In paragraph two on page 141 in *Care and Feeding of Power Grid Tubes*,
regarding thoriated tungsten filaments, Eimac says that "Theoretically, a
3% increase in filament voltage will result in a 20 degree Kelvin increase
in temperature, a 20% increase in peak emission, and a 50% decrease in
life due to carbon loss.  This or course, works the other way too.  For a
small decrease in temperature and peak emission, life of the carbide layer
and hence tube life can be increased by a substantial percentage."

In other words, for every 3% increase in filament voltage above what is
needed, a 50% decrease in emissive life results. The formula [E1/E2]^23.4
is the algebraic representation thereof.  The result is the ratio of
useful emissive life. ( However, filament voltage should not be decreased
to the point where pep begins to decrease. )

Applying [E1/E2]^23.4 to an actual case:  The factory-stock TL-922
amplifier applies 5.3v to the 3-500Z filaments.  However, a healthy 3-500Z
will operate quite satisfactorily in communications service with 4.75v on
the filament.  Using the formula: [4.75v/5.3v]^23.4 = {0.8962]^23.4 =
0.077.  In other words, by operating the filaments at 5.3v at instead of
4.75v, emissive life is reduced to about 8% of what could be achived at
the lower filament voltage.  Of course, in actual practice, this is not
quite realizeable because the filament voltage normally needs to be
increased as the tube nears the end of its useful emissive life.  Thus, a
rheostat to control filament voltage is is rather useful.   However, to
the best of my knowledge, none of the commercial manufacturers provide a
means of adjusting filament voltage.  Art Collins typically provided a
means of adjusting an amplifier's filament voltage.

I pretty much covered this on pages 30 and 31 of "The Nearly Perfect
Amplifier" in the January, 1994 issue of QST magazine.   Does it seem
likely that someone who askes the question "Where does it come from?" has
read the"The Nearly Perfect Amplifier"?

In the September 1994 issue of QST magazine, Mr. Rauch criticized the
article in question, apparently without the benefit of having read at
least two pages of the five page article.   In the October 1994 issue of
QST magazine, MFJ/Ameritron took out over 30 full pages of QST
advertising.
---------------------------
e-mail copy to Mr. Rauch

--
--Rich-- ag6k, 805-386-3734


From [e-mail] Thu Jan 02 17:54:56 1997
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!news-out.communique.net!mr.net!newsfeeds.sol.net!newspump.sol.net!mindspring!gatech!smash.gatech.edu!bordelon.gtri.gatech.edu!user
From: [e-mail] (John Bordelon)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Coherer...What is it?
Date: Tue, 31 Dec 1996 08:08:36 -0500
Organization: Georgia Tech Research Institute
Lines: 31
Message-ID: <[e-mail]>
References: <[e-mail]>
NNTP-Posting-Host: bordelon.gtri.gatech.edu

In article <[e-mail]>, [e-mail]
(pfriedr) wrote:

> I wonder if one of the old timers out there could tell me something about
> "Coherers"---what were they exactly and how did they work?
>
> I get the impression that they functioned as detectors, but I'm puzzled abou
t
> references to "tappers" and other key-wound mechanisms designed to agitate
> them.
>
> Thanks in advance.

   The coherer was indeed a detector.  It was a small glass tube filled
with fine iron powder, with electrodes at each end of the tube.  The
incoming signal caused the iron powder to stick together (cohere).  I'm
not exactly sure why.  Connected to the same terminals was another circuit
that operated a telegraph sounder.  Once the powder "cohered" it wanted to
stay that way, even though the incoming signal was not there, so the clock
wound mechanism was a "tapper" that tapped the side of the glass tube and
broke the iron powder granules up when the signal stopped.  The coherer
was NOT very sensitive.  More sensitive was a rectifier diode made by just
barely touching the surface of a nitric acid bath with a platinum wire and
then drawing the wire out until only a thin meniscus of acid extended from
the surface of the acid to the wire.  The platinum wire slowly got eaten
away and required continuous adjustment for optimum sensitivity.  The
presence of an open container of nitric acid on top of the operating table
was a hazard too.  :-) Connections to the wire and to an electrode in the
acid bath were the two terminals of the diode.  The galena (lead sulfide)
detector beat both of these.
   By the way, I'm only 55, so I wasn't around in those halycon days of
yore. :-)  :-)


From [e-mail] Thu Jan 02 17:54:58 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]
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: RC vs LC
Date: 31 Dec 1996 15:04:34 GMT
Organization: AOL http://www.aol.com
Lines: 33
Message-ID: <[e-mail]>
References: <59r8ec$[e-mail]>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]
X-Newsreader: AOL Offline Reader

In article <59r8ec$[e-mail]>, [e-mail] (Michael
Horowitz) writes:

>   I read where LC combonations make up resonate circuits and filters,
>and I see formula for their calculations. I also see RC circuits
>performing as filters, just as the LC circuits do.
>
>   Does anyone know the formula used to calculate the cutoff frequency
>of a given combination of R and C?

Roy L. posted the formula, but there's more that should be added to the
story.  If you want a very sharp cutoff, you really need to build a
filter with resonances (poles) with specific characteristics you will not
be able to get from just passive RC filters.  But if you put R's and C's
in the proper circuit as feedback around amplifiers, you can get the
overall circuit to perform essentially the same task as LC circuits.
The RC circuits are good for low frequency filters, but don't expect
with even good op amps to get much of an active filter above a
megahertz or so.  The formula you'd use for RC networks in feedback
amplifiers depends on the specific configuration, and I'd advise you to
look up a book on active filter design.  There are dozens of different
ones,
from simple cookbooks to very theoretical.

73,
Tom
[e-mail]


Cheers,
Tom
Please email to: [e-mail].
The account from which this was posted is seldom checked for email.


From [e-mail] Thu Jan 02 17:54:59 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!mindspring!news.bbnplanet.com!cpk-news-hub1.bbnplanet.com!feed1.news.erols.com!howland.erols.net!usc!newshub.csu.net!charnel.ecst.csuchico.edu!waldorf.csc.calpoly.edu!nntp-server.caltech.edu!corvette.mst6.lanl.gov!nntp.cs.sandia.gov!SantaFe!usenet
From: "David B. Holtkamp (K5KH)" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: 31 Dec 1996 16:39:04 GMT
Organization: The Santa Fe Institute
Lines: 12
Message-ID: <01bbf736$bf115760$[e-mail]>
References: <01bbf1bb$53725200$[e-mail]> <[e-mail]> <01bbf1f0$5bc36e00$[e-mail]> <[e-mail]> <01bbf409$e3950da0$[e-mail]> <[e-mail]>
NNTP-Posting-Host: dial146.roadrunner.com

> A choke of several millihenries, or a high value resistor, either of
> which have a high impedance at HF compared to the 50 ohm line they
> are shunting, will drain static, a DC phenomenon, while being virtually
> invisible to the RF system. The choke, or resistor, should have no
> effect on transmission or reception.
>

  Thanks for the reply, Gary!

  73s de David (K5KH)




From [e-mail] Thu Jan 02 17:55:00 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!mindspring!cpk-news-hub1.bbnplanet.com!news.bbnplanet.com!cam-news-hub1.bbnplanet.com!howland.erols.net!usc!newshub.csu.net!charnel.ecst.csuchico.edu!waldorf.csc.calpoly.edu!nntp-server.caltech.edu!corvette.mst6.lanl.gov!nntp.cs.sandia.gov!SantaFe!usenet
From: "David B. Holtkamp (K5KH)" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: 31 Dec 1996 16:40:54 GMT
Organization: The Santa Fe Institute
Lines: 15
Message-ID: <01bbf737$00efd440$[e-mail]>
References: <01bbf1bb$53725200$[e-mail]> <[e-mail]> <01bbf1f0$5bc36e00$[e-mail]> <[e-mail]> <01bbf409$e3950da0$[e-mail]> <[e-mail]> <[e-mail]>
NNTP-Posting-Host: dial146.roadrunner.com


> I use a resistor to bleed the charge on my 70 foot vertical.  Before I
> added the bleeder resistor, during windy weather, the charge on the
> vertical would arc over  a 3500v air variable tuning capacitor about
every
> half minute.  I prefer resistors to chokes because chokes have internal
> self resonances and resistors don't.

  Hi Rich!

  By "high value", do you mean 100k+? Or more than $0.25 a piece? <g>

  Thanks for the suggestion!

  73s de David (K5KH)


From [e-mail] Thu Jan 02 17:55:01 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!uwm.edu!fnnews.fnal.gov!nntp-server.caltech.edu!corvette.mst6.lanl.gov!nntp.cs.sandia.gov!SantaFe!usenet
From: "David B. Holtkamp (K5KH)" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: 31 Dec 1996 16:47:15 GMT
Organization: The Santa Fe Institute
Lines: 13
Message-ID: <01bbf737$e3cf5ba0$[e-mail]>
References: <01bbf2ce$d9423440$[e-mail]> <[e-mail]>
NNTP-Posting-Host: dial146.roadrunner.com
X-Newsreader: Microsoft Internet News 4.70.1155


> I have corona problems here Dave, at a few hundred feet above sea level.
> In Death Valley, they even occur below sea level. We are talking receive,
> not transmit.


  Thanks for the long, informative message, Tom. I appreciate the help!

  73s de David (K5KH)

PS My news server has been dead for a few days...sorry for the delay in
replying.



From [e-mail] Thu Jan 02 17:55:03 1997
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!bigboote.WPI.EDU!cam-news-feed2.bbnplanet.com!news.bbnplanet.com!cam-news-hub1.bbnplanet.com!news.idt.net!enews.sgi.com!news.sgi.com!news.spies.com!stevem
From: [e-mail] (Stephen E. Muther)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Fixing old Reciever?
Date: 31 Dec 1996 17:51:13 GMT
Organization: Canonical Nameworks
Lines: 43
Message-ID: <5abjqh$[e-mail]>
References: <5a4d1i$[e-mail]> <[e-mail]> <5a9q9p$[e-mail]>
NNTP-Posting-Host: vax.area.com

In article <5a9q9p$[e-mail]>,
John Lumkes <[e-mail]> wrote:
>Hello,
>I have an old Scott R-327 stereo reciever I am playing around with.
>It works well in all modes except FM radio, where I can tune (stereo and
>signal strength indicator high) but only hear the station with the volume
>turned all the way up (along with a slight buzz). AM and CD input work
>and sound great. If I spin the tuning dial it is louder as it goes by
>a station but when I tune it is only very faint. I am treating this as
>a test experiment for learning more about FM and would appreciate
>where to begin. i.e., what components to check, what the probable
>cause is, etc?
>
>Thanks alot, this newsgroup is a great place to learn.
>
>John Lumkes, AA9QP
>[e-mail]
>

Sounds like a problem with the low level audio buffers at the output
of the stereo multiplex decoder although its unlikely that both
channels would fail at the same time. It could also be the stereo
decoder itself, which could knock out both channels if there were
a failure. Not sure if your receiver is new enough to have ICs in it
but if it does, you can generally find the pinouts for the stereo
decoder IC in the RCA-SK or NTE semiconductor replacement catalogs.
(NTE has a website).  Use a scope to look at the input to the decoder
IC. You should see mono audio with a 19KHz pilot carrier riding on it.
At the left and right outputs from the decoder you should have decoded
stereo audio at a reasonable level (say 100mV p-p or more).
If everything is OK to that point, its probably the buffer amps
between the decoder and the power amplifier.

There are some newsgroups for audio out there.  I would talk it up in
those and do a web search to try and find a schematic
which will help with your trouble shooting. I think SAMS still sells
their PhotoFact schematics but they have always been expensive.


Good luck

Steve M. WF6R



From [e-mail] Thu Jan 02 17:55:04 1997
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!tezcat!gail.ripco.com!uunet!in1.uu.net!205.228.248.26!news.vcnet.com!port33.vcnet.com!user
From: [e-mail] (R. L. Measures )
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Good source for amplifier tips
Date: Tue, 31 Dec 1996 10:11:48 -0800
Organization: Internet Access of Ventura County
Lines: 23
Message-ID: <[e-mail]>
References: <01bbf1bb$53725200$[e-mail]> <[e-mail]> <01bbf1f0$5bc36e00$[e-mail]> <[e-mail]> <01bbf409$e3950da0$[e-mail]> <[e-mail]> <[e-mail]> <01bbf737$00efd440$[e-mail]>
NNTP-Posting-Host: port33.vcnet.com

In article <01bbf737$00efd440$[e-mail]>, "David B.
Holtkamp (K5KH)" <[e-mail]> wrote:

> > I use a resistor to bleed the charge on my 70 foot vertical.  Before I
> > added the bleeder resistor, during windy weather, the charge on the
> > vertical would arc over  a 3500v air variable tuning capacitor about
> every
> > half minute.  I prefer resistors to chokes because chokes have internal
> > self resonances and resistors don't.
>
>   Hi Rich!
>
>   By "high value", do you mean 100k+? Or more than $0.25 a piece? <g>
>
David-------
The vertical is two half waves in phase for 20m.  This is also known as a
Franklin Antenna.   The antenna is mounted on the roof of a wooden
toolshed.  It is fed at roof level against a quarter wave counterpoise.
The feed Z is around 700 ohms.  The bleeder resistor is 10meg-ohms.  This
resistor can tolerate several kilovolts.

--
--Rich-- ag6k, 805-386-3734


From [e-mail] Thu Jan 02 17:55:06 1997
Path: news1.epix.net!news3.epix.net!uunet!in2.uu.net!206.229.87.25!news.sprintlink.net!news-peer.sprintlink.net!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.homebrew
Subject: Re: Good source for amplifier tips
Date: 31 Dec 1996 19:55:43 GMT
Organization: AOL http://www.aol.com
Lines: 35
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] (R. L. Measures ) writes:

>increased as the tube nears the end of its useful emissive life.  Thus, a
>rheostat to control filament voltage is is rather useful.   However, to
>the best of my knowledge, none of the commercial manufacturers provide a
>means of adjusting filament voltage.  Art Collins typically provided a
>means of adjusting an amplifier's filament voltage.

Another fact almost escaped your great storehouse of knowledge, hi! EVERY
Ameritron PA after the early to mid 80's includes taps for adjusting
filament voltage, and instructions for the proper settings for each line
voltage range.

Can anyone confirm Rich's claims the TL-922 has short tube emission life?
I wonder what the tube experience of 922 owners really is. How many 922
owners have replaced tubes from:

low emission (everything works but output is real low)
gas or anode support failure (a sudden loud bang or pop, or an arc in the
tube)
an internal grid short (idle current even when on standby and no output)

Has anyone else measured the voltage to confirm Rich's story? How about
other PA's?

BTW....I did read your article Rich, I'm afraid I just learned to question
any information presented as an absolute "fact". I mostly agree with your
filament approximation, IF the voltages you presented here are the true
voltages in the Kenwood PA.

I'm sure you understand why I ask these questions. I want to be sure the
facts you state here are verifiable by other independent sources.

73 Tom


From [e-mail] Thu Jan 02 17:55:07 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!demos!news1.relcom.ru!EU.net!howland.erols.net!cliffs.rs.itd.umich.edu!portc01.blue.aol.com!audrey01.news.aol.com!not-for-mail
From: [e-mail] (JohnsonHE)
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Ham-Homebrew Digest V96 #560
Date: 31 Dec 1996 20:31:36 GMT
Organization: AOL http://www.aol.com
Lines: 3
Message-ID: <[e-mail]>
References: <Pine.SV4.3.92.961220104503.13922A-100000@bookworm>
NNTP-Posting-Host: ladder01.news.aol.com
X-Admin: [e-mail]

Or, by anyone else!

W4ZCB


From [e-mail] Thu Jan 02 17:55:08 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!news-xfer.netaxs.com!newsfeeds.sol.net!mr.net!news.clark.net!news.usit.net!news
From: paul case <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: help: GE Porta.mobil
Date: Tue, 31 Dec 1996 12:38:52 -0800
Organization: usit.net
Lines: 12
Message-ID: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: bway-slip268.dynamic.usit.net
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.0Gold (Win16; I)

I recently acquired two GE porta-mobil radios. These were originally
used on 44 mhz by the Tennessee Forestry Service. I would like to
convert them to 6 meters but I dont have the schematics on them. The
model# was worn on both of them but i could make out a FCC # which was
hr44las33 if that helps any. They disconnect in the middle. The lower
half is a power supply and the upper half is the tranciever. Possibly
the upper half may have plugged into a module for mobile use but im not
sure. Anyone having schematics or if anyone has done a 6 meter
conversion with these rigs any info will be appreciated

                            Thanks
                            Paul


From [e-mail] Thu Jan 02 17:55:09 1997
Path: news1.epix.net!news3.epix.net!uunet!in3.uu.net!205.252.116.190!feed1.news.erols.com!howland.erols.net!vixen.cso.uiuc.edu!chaos.crhc.uiuc.edu!news2.acs.oakland.edu!newsfeed.concentric.net!news-master!news
From: "Bruce Raisley A.R.S. N9ZLE" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Free internet swap shop!
Date: Tue, 31 Dec 1996 16:47:25 -0500
Organization: Skymaster Products
Lines: 7
Message-ID: <[e-mail]>
NNTP-Posting-Host: cnc035057.concentric.net
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.01Gold (Win95; I)

http://www.concentric.net/~n9zle

Check it out, list your own items on a world wide web page.
As seen in 73s Magazine. Includes graphics. List an item and add
a picture with it. New changes every day come check it out!

                        mailto:[e-mail]


From [e-mail] Thu Jan 02 17:55:09 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!www.nntp.primenet.com!nntp.primenet.com!howland.erols.net!feeder.chicago.cic.net!compuserve.com!news.production.compuserve.com!news
From: Brian Webb <[e-mail]>
Newsgroups: rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.amateur.misc,rec.radio.amateur.space
Subject: New Web Page
Date: 31 Dec 1996 21:48:40 GMT
Organization: Umbra Research
Lines: 8
Message-ID: <5ac1no$nmj$[e-mail]>
Xref: news1.epix.net rec.radio.amateur.equipment:45601 rec.radio.amateur.homebrew:22627 rec.radio.amateur.misc:122453 rec.radio.amateur.space:9282

If you're interested in amateur radio or space, visit my new web
page at:

 http://ourworld.compuserve.com/homepages/rawhide_home_page

Happy New Year,

Brian Webb, KD6NRP


From [e-mail] Thu Jan 02 17:55:11 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!vixen.cso.uiuc.edu!chaos.crhc.uiuc.edu!news2.acs.oakland.edu!newsfeed.concentric.net!news-master!news
From: "Bruce Raisley A.R.S. N9ZLE" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: SSTV,FAX,RTTY,CW and more!
Date: Tue, 31 Dec 1996 16:59:13 -0500
Organization: Skymaster Products
Lines: 12
Message-ID: <[e-mail]>
NNTP-Posting-Host: cnc035057.concentric.net
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.01Gold (Win95; I)

SSTV,WEFAX,RTTY,CW along with a few more modes.
Spectrum analizer, digital scope on your computer all with the
origanal HamComm adapter.

Now you can get a multimode (NEW) for under $35 software included.
Receive version for less than $20 (requires PC speaker to xmit)
Check out this page on the NET!

http://www.concentric.net/~n9zle/hc.html

There is more software available for this item than you can shake a
stick at. Just check out this page.


From [e-mail] Thu Jan 02 17:55:12 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!news-xfer.netaxs.com!news.dra.com!feed1.news.erols.com!howland.erols.net!news-peer.gsl.net!news.gsl.net!news-hk.gsl.net!news.gsl.net!newsgate.cuhk.edu.hk!news.glink.net.hk!uunet!in2.uu.net!198.207.169.10!holonet!colossus.holonet.net!atdbbs!clint.bradford
From: [e-mail] (Clint Bradford)
Newsgroups: rec.radio.amateur.homebrew
Subject: RE: Please read!
Date: Tue, 31 Dec 1996 22:18:00 GMT
Message-ID: <[e-mail]>
Organization: ATTENTION to Details BBS - Mira Loma, CA
Distribution: world
References: <[e-mail]>
Lines: 15


>>But BBS sysops have to change with
>>the times, and they have to be willing to invest to upgrade their
>>systems to compete with (or complement) the Web.

As soon as I can acquire file transfer speeds on the WWW as fast as
those from a BBS...and as soon as I can get LIVE assistance from a real
Sysop...and as soon as "Customer Service" becomes import to
WEBMasters...

THEN - and ONLY THEN - might I consider the WWW to be a "threat" to a
well-designed, well-honed, ANSI-based Bulletin Board System.

-Clint Bradford
 ATTENTION to Details BBS


From [e-mail] Thu Jan 02 17:55:14 1997
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!usenet.eel.ufl.edu!news-peer.gsl.net!news.gsl.net!howland.erols.net!newspump.sol.net!newsfeeds.sol.net!news.maxwell.syr.edu!news.sprintlink.net!news-pen-16.sprintlink.net!hermes.is.co.za!iafrica.com!196-7-116-226
From: [e-mail] (J. L.)
Newsgroups: rec.radio.amateur.homebrew
Subject: Long Delayed Echo mysteries...
Date: Tue, 31 Dec 96 22:25:49 GMT
Organization: UUNET Internet Africa
Lines: 30
Message-ID: <5ac3td$[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 17:55:15 1997
Path: news1.epix.net!news3.epix.net!uunet!in2.uu.net!205.252.116.190!feed1.news.erols.com!news
From: Steve <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Re: Coherer...What is it?
Date: Tue, 31 Dec 1996 14:40:26 -0800
Organization: Erol's Internet Services
Lines: 43
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]>
NNTP-Posting-Host: dam-as13s29.erols.com
Mime-Version: 1.0
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John Bordelon wrote:
>
> In article <[e-mail]>, [e-mail]
> (pfriedr) wrote:
>
> > I wonder if one of the old timers out there could tell me something about
> > "Coherers"---what were they exactly and how did they work?
> >
> > I get the impression that they functioned as detectors, but I'm puzzled ab
out
> > references to "tappers" and other key-wound mechanisms designed to agitate
> > them.
> >
> > Thanks in advance.
>
>    The coherer was indeed a detector.  It was a small glass tube filled
> with fine iron powder, with electrodes at each end of the tube.  The
> incoming signal caused the iron powder to stick together (cohere).  I'm
> not exactly sure why.  Connected to the same terminals was another circuit
> that operated a telegraph sounder.  Once the powder "cohered" it wanted to
> stay that way, even though the incoming signal was not there, so the clock
> wound mechanism was a "tapper" that tapped the side of the glass tube and
> broke the iron powder granules up when the signal stopped.  The coherer
> was NOT very sensitive.  More sensitive was a rectifier diode made by just
> barely touching the surface of a nitric acid bath with a platinum wire and
> then drawing the wire out until only a thin meniscus of acid extended from
> the surface of the acid to the wire.  The platinum wire slowly got eaten
> away and required continuous adjustment for optimum sensitivity.  The
> presence of an open container of nitric acid on top of the operating table
> was a hazard too.  :-) Connections to the wire and to an electrode in the
> acid bath were the two terminals of the diode.  The galena (lead sulfide)
> detector beat both of these.
>    By the way, I'm only 55, so I wasn't around in those halycon days of
> yore. :-)  :-)

There were many different types of coherers, most of which used iron
filings.  The Marconi used Nickel and Silver filings, the Solari used
mercury and some others used carbon.  These things were used from the
1880's to the early 1900's.

If you want more specific info contact the Antique Wireless Association
(AWA).  http://www.ggw.org/freenet/a/awa/

S


From [e-mail] Thu Jan 02 17:55:16 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: sci.electronics.design,sci.electronics.misc,rec.radio.swap,rec.radio.amateur.homebrew
Subject: Re: Rigorous analysis of Twin-T Filter
Date: Tue, 31 Dec 96 23:53:44 GMT
Organization: EZNEC Antenna Software
Lines: 19
Message-ID: <5ac938$2vu$[e-mail]>
References: <5a75jg$[e-mail]>
NNTP-Posting-Host: ip-pdx22-21.teleport.com
X-Newsreader: News Xpress Version 1.0 Beta #3
Xref: news1.epix.net sci.electronics.design:29068 sci.electronics.misc:19391 rec.radio.swap:102126 rec.radio.amateur.homebrew:22634

In article <5a75jg$[e-mail]>,
   [e-mail] (lbliao) wrote:
>I am looking for any book that does the rigorous analysis of the twin T
>filter. Preferably, the book or paper should discuss all the modes of
>operation of the filter including those when the zeros are in the right
>half plane. Information on other filters that are either notch or peaking
>at a certain frequency with better performance or lower parts count, or
>allowing simple adjustment of the frequency is also welcome.

I have a paper by Sanjit K. Mitra ("Synthesizing active filters", IEEE
Spectrum, vol. 6, pp. 47-63, Jan. 1969) which briefly mentions the
twin-Tee. It refers to it as originating with a person named Moschytz, and
references a paper which sounds like it has a lot more analysis. The paper
(which I don't have) is Moschytz, G.S., "Miniaturized filter building
blocks using frequency emphasizing networks", Proc. Nat'l Electron. Conf.,
pp. 364-369, 1967. If you can't find this you might look for other papers
or books by this author. Good luck!

Roy Lewallen, w7EL


From [e-mail] Thu Jan 02 17:55:17 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.homebrew
Subject: Re: inductive coupling a meter?
Date: Wed, 01 Jan 97 00:01:05 GMT
Organization: EZNEC Antenna Software
Lines: 22
Message-ID: <5ac9h0$2vu$[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]>,
   Gerry & Robin Lempicki <[e-mail]> wrote:
>I salvaged a few old meters from some old equipment.  I would like to
>change the faces and hook these up to indicate power out (not looking
>for anything accurate, just a neat large meter needle jumping on
>voice/signal modulation...these are abt 6" x 9"...would look cool)  Does
>anyone have an idea for hooking these up?  Can I wrap some wire around a
>coax to get an indication of power out?  What type of circuit can i
>throw together to make this work?  -Gerry

Hook the cathode (banded) end of a diode to the + meter terminal. Connect a
wire from the - meter terminal to your rig's chassis or something else
that's grounded. Connect a ceramic capacitor (one of the flat jobs, round
or square) of any value from about .001 uF to 0.1 uF between the meter
terminals. Then connect a wire to the other end of the diode and dangle it
around the shack. Start with a short wire so you don't damage the meter
with too much deflection. Adjust the deflection by changing the length and
position of this wire.

Have fun!

Roy Lewallen, W7EL


From [e-mail] Thu Jan 02 17:55:19 1997
Path: news1.epix.net!news3.epix.net!info.cs.uofs.edu!news.ultranet.com!news-out.communique.net!mr.net!newsfeeds.sol.net!newspump.sol.net!news.mindspring.com!usenet
From: "Timothy S. Powell" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: 2meter ssb receiver, need help to build one.
Date: Tue, 31 Dec 1996 16:01:39 -0800
Organization: MindSpring Enterprises, Inc.
Lines: 13
Message-ID: <[e-mail]>
NNTP-Posting-Host: user-168-121-33-127.dialup.mindspring.com
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
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X-Server-Date: 1 Jan 1997 05:18:29 GMT
X-Mailer: Mozilla 3.01 (Win16; I)

Is there any information on the web about building a 2 meter ssb
receiver?  I have the Sam "Radio Handbook" 23rd edition and "The ARRL
Handbook..." 1993 edition.  Both give schematic drawings for all the
stages but not how to determine the values needed.  I might have looked
over that part of the book but I have been looking hard and reading.  I
am looking for a way to build a 2 meter ssb receiver for hearing the sat
P3D.  After I get the receiver working I plan to get to work on a 70cm
ssb transmitter to work P3D when it's up and working, but only one
project at a time.  Thanks for any help you can give me.

Timothy S.Powell

KD4IKY


From [e-mail] Thu Jan 02 17:55:21 1997
Path: news1.epix.net!news4.epix.net!cdc2.cdc.net!news.texas.net!news-xfer.netaxs.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-dc-10.sprintlink.net!news.smartlink.net!infosoftpub.com!george.tamayo
From: [e-mail] (George Tamayo)
Newsgroups: rec.radio.amateur.homebrew
Subject: Message from Pat Clawson
Date: Wed, 01 Jan 1997 00:40:00 (PST)
Organization: Infosoft Publishing Company (805-288-1414)
Lines: 36
Message-ID: <[e-mail]>
Reply-To: [e-mail] (George Tamayo)
NNTP-Posting-Host: pm115-55.smartlink.net
X-mailer: PowrMAIL for PowerBBS Ver. 1.5 (Beta 6b) (rev. 1.00d)

Forwarded Message; [e-mail] (PAT CLAWSON) said to GEORGE TAMAYO

C(>George...
C(>
C(>
C(>My remarks concering BBS systems were not meant in any way as
C(>a slight against ham radio operators.  I've personally been involved
C(>in commercial broadcasting AND amateur radio activities for over
C(>20 years, and I have a very high regard for hams and recognize their
C(>public service activities and technical expertise.
C(>
C(>Still, there is a world of difference between commercial broadcasters
C(>-- who have tens of millions of dollars wrapped up in their stations
C(>-- and the local ham, who has at most several thousand dollars. I was
C(>attempting, perhaps somewhat  inartfully at a very late hour, to make
C(>a similar comparison between BBS sysops and Web site operators.
C(>
C(>I hope you will post this to those newsgroups and lists that you
C(>forwarded my original message.
C(>
C(>Regards,
C(>
C(>Pat Clawson
C(>TeleGrafix Communications
C(>
C(>
C(>

---
George M. Tamayo - WD6EJO
South Mountain Online
---
 * PowerAccess 1.50 That's not line noise--my modem's speaking in tongues!





From [e-mail] Thu Jan 02 17:55:22 1997
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From: [e-mail] (George Tamayo)
Newsgroups: rec.radio.amateur.homebrew
Subject: Message from Pat Clawson
Date: Wed, 01 Jan 1997 00:40:00 (PST)
Organization: Infosoft Publishing Company (805-288-1414)
Lines: 36
Message-ID: <[e-mail]>
Reply-To: [e-mail] (George Tamayo)
NNTP-Posting-Host: pm115-55.smartlink.net
X-mailer: PowrMAIL for PowerBBS Ver. 1.5 (Beta 6b) (rev. 1.00d)

Forwarded Message; [e-mail] (PAT CLAWSON) said to GEORGE TAMAYO

C(>George...
C(>
C(>
C(>My remarks concering BBS systems were not meant in any way as
C(>a slight against ham radio operators.  I've personally been involved
C(>in commercial broadcasting AND amateur radio activities for over
C(>20 years, and I have a very high regard for hams and recognize their
C(>public service activities and technical expertise.
C(>
C(>Still, there is a world of difference between commercial broadcasters
C(>-- who have tens of millions of dollars wrapped up in their stations
C(>-- and the local ham, who has at most several thousand dollars. I was
C(>attempting, perhaps somewhat  inartfully at a very late hour, to make
C(>a similar comparison between BBS sysops and Web site operators.
C(>
C(>I hope you will post this to those newsgroups and lists that you
C(>forwarded my original message.
C(>
C(>Regards,
C(>
C(>Pat Clawson
C(>TeleGrafix Communications
C(>
C(>
C(>

---
George M. Tamayo - WD6EJO
South Mountain Online
---
 * PowerAccess 1.50 That's not line noise--my modem's speaking in tongues!





From [e-mail] Thu Jan 02 17:55:23 1997
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!news-stkh.gsl.net!news.gsl.net!sn.no!nntp.uio.no!in1.nntp.cais.net!news2.cais.com!news
From: "Ron Sibbitt" <[e-mail]>
Newsgroups: rec.ham-radio.swap,rec.radio.amateur.equipment,rec.radio.amateur.homebrew,rec.radio.swap
Subject: -FS-  Pair of Motorola MRF 247  RF Power Transistors
Date: 1 Jan 1997 01:18:16 GMT
Organization: A.R.S. N8LMT
Lines: 12
Message-ID: <01bbf780$de1df380$LocalHost@n8lmt>
NNTP-Posting-Host: 206.148.103.96
X-Newsreader: Microsoft Internet News 4.70.1160
Xref: news1.epix.net rec.radio.amateur.equipment:45598 rec.radio.amateur.homebrew:22626 rec.radio.swap:102106

I have a matched pair of new Motorola
MRF-247 transistors, I bought these
from RF Parts a few years ago to repair
a 160 watt 2m amp....never got around to
doing the job. I want $40.00 for the
pair... i'll pay the postage.

73,
Ron Sibbitt
5885 Galbraith Line Road
Croswell, MI 48422
E-Mail - [e-mail]


From [e-mail] Thu Jan 02 17:55:24 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!in3.uu.net!207.155.38.10!news.qnet.com!usenet
From: "Will, KN6DV" <[e-mail]>
Newsgroups: rec.radio.amateur.homebrew
Subject: Good source for amplifier tips
Date: 1 Jan 1997 03:38:13 GMT
Organization: KN6DV
Lines: 22
Message-ID: <01bbf795$435bd460$[e-mail]>
NNTP-Posting-Host: lanc01-14.ca.qnet.com
X-Newsreader: Microsoft Internet News 4.70.1155

For those who are interested in the on going discussion of the interesting
topic of " Good source for amplifier tips" I have upload part 10 and part
11 you van find the 11 parts via my home page:
--
http://www.av.qnet.com/~kn6dv

This is a uncensored and uncut archive with all the complete articles.
I am sorry for the delay of part 10 and 11 just been busy with Christmas
thing etc.

HAPPY NEW YEAR

73 Will,  KN6DV

[e-mail]


REFORM
Unless the reformer can invent something which substisutes attractive
virtues for atractive vices, he will fail.
(Walter Lippmann)



From [e-mail] Thu Jan 02 17:55:25 1997
Path: news1.epix.net!news3.epix.net!uunet!in2.uu.net!204.71.0.48!newsfeed.internetmci.com!nic.win.hookup.net!noc.van.hookup.net!news.bctel.net![e-mail]
From: K Perry <"K&V _Perry"@bc.sympatico.ca>
Newsgroups: alt.radio.scanner,rec.radio.scanner,rec.radio.swap,rec.radio.amateur.homebrew,rec.radio.amateur.equipment,
Subject: Re: RS PRO 26
Date: Tue, 31 Dec 1996 19:39:52 -0800
Organization: BCTEL Advanced Communications
Lines: 14
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]> <32C41CC4.573F@204.140.227.4>
Reply-To: K&V, [e-mail]
NNTP-Posting-Host: vanc06m04-72.bctel.ca
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The following link has some info on cell mods for your PRO 26.

Good Luck!


K. Perry



ballen@204.140.227.4 wrote:
>
> I just received a Pro-26 for a xmas present. Does anyone know any mods
> for the cellular lockout????
> Bill N6XD


From [e-mail] Thu Jan 02 17:55:26 1997
Path: news1.epix.net!news3.epix.net!uunet!in3.uu.net!204.71.1.48!newsfeed.internetmci.com!nic.win.hookup.net!noc.van.hookup.net!news.bctel.net![e-mail]
From: K Perry <"K&V _Perry"@bc.sympatico.ca>
Newsgroups: alt.radio.scanner,rec.radio.scanner,rec.radio.swap,rec.radio.amateur.homebrew,rec.radio.amateur.equipment,
Subject: Re: RS PRO 26
Date: Tue, 31 Dec 1996 19:41:13 -0800
Organization: BCTEL Advanced Communications
Lines: 15
Message-ID: <[e-mail]>
References: <[e-mail]> <[e-mail]> <32C41CC4.573F@204.140.227.4>
Reply-To: K&V, [e-mail]
NNTP-Posting-Host: vanc06m04-72.bctel.ca
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Mailer: Mozilla 3.0 (Win95; I)
To: ballen@204.140.227.4
Xref: news1.epix.net alt.radio.scanner:43922 rec.radio.scanner:74677 rec.radio.swap:102120 rec.radio.amateur.homebrew:22631 rec.radio.amateur.equipment:45603

The following link has a cell mod for you PRO 26.

Good Luck!


K. Perry

http://www.zianet.com/kc5kto/mods/pro26cell.html


ballen@204.140.227.4 wrote:
>
> I just received a Pro-26 for a xmas present. Does anyone know any mods
> for the cellular lockout????
> Bill N6XD


From [e-mail] Thu Jan 02 17:55:26 1997
Path: news1.epix.net!news4.epix.net!news.sprintlink.net!news-pen-14.sprintlink.net!www.nntp.primenet.com!nntp.primenet.com!EU.net!howland.erols.net!feed1.news.erols.com!news.ecn.uoknor.edu!munnari.OZ.AU!news.uwa.edu.au!not-for-mail
From: [e-mail] (Richard Burden)
Newsgroups: rec.radio.amateur.homebrew
Subject: Please help with unknown bandwidth of Crystal Filter
Date: Wed, 01 Jan 1997 04:16:22 GMT
Organization: The University of Western Australia
Lines: 17
Message-ID: <5acoij$87b$[e-mail]>
NNTP-Posting-Host: rburden.dialup.ecel.uwa.edu.au
X-Newsreader: Forte Free Agent 1.0.82

Hi,

picked up some surplus commercial VHF radios at a recent Hamfest and
wondered if anyone knew the bandwidth for the following crystal filters:

HyQ "QF10701" and "QF10A7"
HCM "10M-4B"
Phillips "10.7N" and "10.7P"
Murata "CFM455F" and "CFM455D"

Thanks in advance,

Richard VK6FKB

ps - if these are of use to you then let me know!!




From [e-mail] Thu Jan 02 17:55:27 1997
Path: news1.epix.net!news3.epix.net!uunet!not-for-mail
From: [e-mail] (BJ Nash)
Newsgroups: rec.radio.amateur.homebrew
Subject: Aviation Radios Available
Date: Wed, 01 Jan 1997 04:47:55 GMT
Organization: AIRCRAFT REMAN
Lines: 15
Message-ID: <[e-mail]>
Reply-To: [e-mail]
NNTP-Posting-Host: 204.255.200.2
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
X-Newsreader: Forte Agent .99g/16.339

Aircraft radios should be a drug on the market because the new regs
mean a lot of them do not meet the 30ppm freq tolerance rule.  Most
are 12 volt units with a freq range of 118.0 to 135.95 mc in tenth mc
steps, 5-10 watts output, AM. Transmit with carbon mikes. Some have
108.0 to 115.95 additional receivers built in to receive VOR and Loc.
stations.  If interested, I have a list of some of them for sale. send
email to [e-mail] for an auto-response list.

BJ nash


AIRCRAFT REMANUFACTURING
1291 E.Vista Way, #150
VISTA, CA. 92084   [phone]     FAX: [phone]
Sales Directory: [e-mail]