QRZ! Ham Radio 5/QRZ Ham Radio Callsign Database - Volume 5.iso/digests/infoham/940687.txt

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Date: Tue, 21 Jun 94 04:30:07 PDT
From: Info-Hams Mailing List and Newsgroup <[e-mail]>
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Subject: Info-Hams Digest V94 #687
To: Info-Hams


Info-Hams Digest            Tue, 21 Jun 94       Volume 94 : Issue  687

Today's Topics:
                       * SpaceNews 13-Jun-94 *
                Do US Fieldday stns seek QSOs wid EU?
                    IPS Daily Report - 20 June 94
                             Need address
                            QSL COLLECTION
                         QSL info for FK8GS?
                             Sign me up!
                         Tech. Question Pool
          Transmission Line Impedance: Why so many? (2 msgs)
         You know its time to retire from the hobby when....

Send Replies or notes for publication to: <[e-mail]>
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Problems you can't solve otherwise to [e-mail].

Archives of past issues of the Info-Hams Digest are available
(by FTP only) from UCSD.Edu in directory "mailarchives/info-hams".

We trust that readers are intelligent enough to realize that all text
herein consists of personal comments and does not represent the official
policies or positions of any party.  Your mileage may vary.  So there.
----------------------------------------------------------------------

Date: Tue, 21 Jun 1994 00:37:42 GMT
From: ihnp4.ucsd.edu!sdd.hp.com!hpscit.sc.hp.com!icon![e-mail]
Subject: * SpaceNews 13-Jun-94 *
To: [e-mail]

Anybody know if AO-27 is still on it's weekend-only schedule?  I haven't
heard it recently, and I also heard some folks talking on AO-21 last night
saying it was not available at all (weekends included).

Any idea on when it will be operating on the amateur bands again?

Greg  KD6KGW

------------------------------

Date: 21 Jun 1994 01:50:01 -0500
From: ihnp4.ucsd.edu!dog.ee.lbl.gov!agate!howland.reston.ans.net!cs.utexas.edu![e-mail]
Subject: Do US Fieldday stns seek QSOs wid EU?
To: [e-mail]

Hi field day fans,

Guess the CW field day is getting closer. During the EU field day
stations are desperately looking for DX stations for multipliers.

Is this the same during the US field day?
What should I know if I want to distribute points to FDers in the
U.S.? What is the exchange code? RST/NR?

73 de IK2RMZ
(please e-mail a copy of your reply to [e-mail])

--
Martin Zurn                           ( [e-mail] )

------------------------------

Date: Mon, 20 Jun 1994 23:12:43 GMT
From: ihnp4.ucsd.edu!dog.ee.lbl.gov!agate!msuinfo!harbinger.cc.monash.edu.au!news.cs.su.oz.au!metro!ipso![e-mail]
Subject: IPS Daily Report - 20 June 94
To: [e-mail]

SUBJ: IPS DAILY SOLAR AND GEOPHYSICAL REPORT
ISSUED AT 20/2330Z JUNE 1994 BY IPS RADIO AND SPACE SERVICES
FROM THE REGIONAL WARNING CENTRE (RWC), SYDNEY.
SUMMARY FOR 20 JUNE AND FORECAST UP TO 23 JUNE

No IPS Disturbance Warning is current
-----------------------------------------------------------

1A. SOLAR SUMMARY
Activity: very low

Flares: none.

Observed 10.7 cm flux/Equivalent Sunspot Number : 076/014

1B. SOLAR FORECAST
             21 June            22 June            23 June
Activity     Very low           Very low           Very low
Fadeouts     None expected      None expected      None expected

Forecast 10.7 cm flux/Equivalent Sunspot Number : 073/009

1C. SOLAR COMMENT
None.
-----------------------------------------------------------

2A. MAGNETIC SUMMARY
Geomagnetic field at Learmonth: quiet to unsettled

Estimated Indices : A   K           Observed A Index 19 June
    Learmonth       13  3332 3233
    Fredericksburg  15                          20
    Planetary       12                          24

Observed Kp for 19 June: 2246 5333


2B. MAGNETIC FORECAST
DATE      Ap    CONDITIONS
21 Jun    18    Quiet to unsettled.
22 Jun    15    Quiet to unsettled.
23 Jun    10    Quiet to unsettled.

2C. MAGNETIC COMMENT
None.
3A. GLOBAL HF PROPAGATION SUMMARY
                LATITUDE BAND
DATE        LOW            MIDDLE         HIGH
20 Jun      normal         normal         fair-normal
PCA Event : None.
3B. GLOBAL HF PROPAGATION FORECAST
                LATITUDE BAND
DATE        LOW            MIDDLE         HIGH
21 Jun      normal         normal         normal
22 Jun      normal         normal         normal
23 Jun      normal         normal         normal
3C. GLOBAL HF PROPAGATION COMMENT
NONE.

-----------------------------------------------------------

4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY
MUFs at Sydney were near predicted monthly values.

Observed T index for 20 June:  38

Predicted Monthly T Index for June is 30.

4B. AUSTRALIAN REGION IONOSPHERIC FORECAST
DATE   T-index  MUFs
21 Jun    35    Near predicted monthly values.
22 Jun    30    Near predicted monthly values.
23 Jun    30    Near predicted monthly values.


4C. AUSTRALIAN REGION COMMENT
None.




--
IPS Regional Warning Centre, Sydney           |IPS Radio and Space Services
email: [e-mail]  fax: [phone]      |PO Box 5606
RWC Duty Forecaster   tel: [phone]      |West Chatswood NSW 2057
Recorded Message      tel: [phone]      |AUSTRALIA

------------------------------

Date: 19 Jun 94 20:46:00 +0000
From: ihnp4.ucsd.edu!agate!howland.reston.ans.net!math.ohio-state.edu!jussieu.fr!univ-lyon1.fr!swidir.switch.ch!newsfeed.ACO.net!Austria.EU.net!hp4at!st!z2!n310!f22!p44!Wolf.Harranth@network.
Subject: Need address
To: [e-mail]

Can anyone help with the address of
KA6UXR Dr. Alexander Comfort   ???
94 Callbook address (121 S Evergreen, Ventura CA 9303) is not correct.

Tnx,
73 de Wolf OE1WHC

------------------------------

Date: 19 Jun 94 20:37:00 +0000
From: library.ucla.edu!europa.eng.gtefsd.com!howland.reston.ans.net!math.ohio-state.edu!jussieu.fr!univ-lyon1.fr!swidir.switch.ch!newsfeed.ACO.net!Austria.EU.net!hp4at!st!z2![e-mail]
Subject: QSL COLLECTION
To: [e-mail]

QSL COLLECTION, an International Curatorium with headquarters in Vienna,
Austria, is the world's biggest collection of about 500.000 QSLs and
Awards of broadcasting stations and radio amateurs. We collect, keep
archivves, research, make available to publishers, and exhibit in public
verifications of radio reception from the early days up to to-day. Our
voluntary work is financed and supported by sponsors all over the world.
QSLs are acquired by bequests, from club stations, QSL managers,
DXpeditions and individuals, sending those cards they no longer wish to
keep. We also welcome declarations of dedication at a later stage and try
to fill gaps by extensive monitoring and by circulating lists of missing
QSLs. If you would like to help us or are interested in our activities,
please ask for further information.

Wolf Harranth OE1WHC, Curator

QSL COLLECTION c/o Radio Austria International, A-1136 Vienna, Austria /
Europe
Echomail: FIDO SHORTWAVE, SHORTWAVE.GER, DARC.GER
          Internet REC.RADIO.SHORTWAVE,
                   REC.RADIO.AMATEUR.MISC
Netmail:  wolf_harranth @ p44.f22.n310.z2.fidonet.org

------------------------------

Date: Mon, 20 Jun 94 19:43:46 PDT
From: pa.dec.com!wrksys.enet.dec.com![e-mail]
Subject: QSL info for FK8GS?
To: [e-mail]

I worked FK8GS on 19 Feb. 1994 on 40 CW during the ARRL DX contest.

No one on the "East Coast Megacluster" [KO0U] can dig up any QSL
information.  Can you?

Please reply to me directly.

73 - Jim AD1C
[e-mail]

------------------------------

Date: Tue, 21 Jun 1994 02:02:24 GMT
From: ihnp4.ucsd.edu!agate!iat.holonet.net!pcappbbs![e-mail]
Subject: Sign me up!
To: [e-mail]

Hey Ron,
    How are you doing?  I now have an address that works!  So you and
your buddy Hugh can send me more mail.

    Well, was the move back worth it?  Are you still having fun?  Is the
new job still a challenge for you?

    In a nut shell, same 'ol' same 'ol around here.  I'm changing
stations at the end of the month.  Going to Palos Verdes Estates.  Less
Butthead people, less runs, more time to study.  I am getting ready to
upgrade this system.  I was thinking about a 486 DX4 100mhgz, but I
don't want to melt down!  So I think that I will go with a 486 DX2 66.
I already put another Hard Drive in.  I kept the original and added a
second.  I got a hold of a used, for two weeks, Conner 240 meg. for
$60.00.  I could'nt pass it up.  That is my windows drive.  I am using
that to slowly make the transition from DOS to Windows.  The key word is
"SLOWLY".  I still do not like the windows enviroment.  So much of the
screen is wasted on the menu and toolbars.  I know, everyone tells me
the same thing.  Get a bigger monitor.  If all of tha junk wasn't there,
I wouldn't need a bigger monitor!  Well, enough of that.

    John bought a Flat in downtown Denver.  He moved in last week.  He
is now truely a Denver YUPPIE.  He seems to like it.  He is still
getting settled in.  This week he is on a business trip, again.  That
guy spends most of his time on the road.  He says that work is going
well.  He seems to be enjoying the whole deal.  That is good for John.
I got a call from Derek Roysden the other day.  I haven't returned his
call yet.  I am kind of scared too!  I'm not sure what to expect.  He is
now in New Mexico.  I wonder if they are ready for him?  No, I'm sure
that he is doing good.  Derek is like a cat, he always lands on his
feet.  Mark and Lisa are doing good.  They are both having fun with the
new baby.  Penny and Greg are good also.  The both of them are about the
same and enjoying Kris.  He will be 1 year old in a couple of weeks.
Man, how time flies.  It just seems like yesterday that I was up at
your place to see Nolan. Wow, I'm starting to feel old.  Just for a
second.

    Anyway, that's it from here.  I glad that this Internet thing is
working.  This will be alot of fun.  I will look forward to hearing from
you soon.  You guys take care and have a good one.

Later,

MIKEY
[e-mail]

------------------------------

Date: 21 Jun 1994 01:05:21 GMT
From: ihnp4.ucsd.edu!sdd.hp.com!math.ohio-state.edu!usc!howland.reston.ans.net!spool.mu.edu!vms.csd.mu.edu![e-mail]
Subject: Tech. Question Pool
To: [e-mail]

I'm looking for the most recent tech. question pool.  If anyone
can provide an electronic copy, or point me to a source
for them in print, I'd be very appreciative.  Also, does
the tech no code exam include the novice exam?

Thanks for the help,
[e-mail]

------------------------------

Date: 20 Jun 1994 23:14:00 GMT
From: ihnp4.ucsd.edu!agate![e-mail]
Subject: Transmission Line Impedance: Why so many?
To: [e-mail]

In article <[e-mail]>,
Gary Coffman <[e-mail]> wrote:
>In article <2u44fg$[e-mail]>
>[e-mail] (D.J.Trynor EE) writes:
>>It seems that there are so many transmission lines impedances (i.e 50, 75,
>>300 ohms).
>>Is there a technical reason for this or was it merely a development of
>>different standards?
>
>At least for coax, there are technical reasons. 75 ohm *air line* (actually
>76.708 ohms) has the lowest loss of any impedance coax. If we replace
>the air with polyethelene, we have 50 ohm cable (actually 51.02 ohms).
>That's because the ratio of conductor diameters for lowest loss is 3.59112:1
>in both cases, the dielectric making the difference in surge impedance.
>
>Gary

This must be for some preset inner conductor diameter.  When I work
the loss of the coax (assuming perfect dielectric -- loss only due
to skin effect), I get:

alpha = R/2Zo

where R = (Rs/2pi)*(1/ro + 1/ri)
and Zo = (sqrt (mu/epsilon)/2pi)*(ln(ro/ri))

So, for a given inner conductor diameter, there will be a specific
impedance for minimum loss, but I don't see how that ratio holds
for all sizes.  Is my math messed up?  Oh, Rs is the skin effect sheet
resistance.

                    -ken

------------------------------

Date: 21 Jun 1994 00:24:48 GMT
From: ihnp4.ucsd.edu!library.ucla.edu!europa.eng.gtefsd.com!howland.reston.ans.net!gatech!taco.cc.ncsu.edu!csemail.cropsci.ncsu.edu![e-mail]
Subject: Transmission Line Impedance: Why so many?
To: [e-mail]

In article <2u44fg$[e-mail]> [e-mail] (D.J.Trynor EE) writes:
>It seems that there are so many transmission lines impedances (i.e 50, 75,
>300 ohms).
>Is there a technical reason for this or was it merely a development of
>different standards?
>
>Don Trynor VE9NZ

The following is *pure* conjecture.

The ideal dipole over perfect ground at perfect height would have
an input impedance of 72 ohms.  So design some 73 ohm coax for a
"perfect match.  ;^)

Then some clown, like myself, notices that many many *real* dipoles
on HF have input impedances of 50-55 ohms...so make some 52 ohm
coax for a match...and, BTW, make 50 ohms the *realistic* standard
termination for xmtrs.

Then someone notices the need for coax to feed a perfect groundplane...
37 ohms (pop quiz: name the designation for that coax).  However,
in reality, one needs one-half of 50 ohms (not one-half of 73 ohms)...
so make some 25 ohm coax (yes there is)...which turns out to be well
suited to direct feeding the driven element of the typical HF
3-element Yagi.

There is further justification of 73 and 93 ohm coaxes (other than
being roots of minimization equations)...how about acting as
quarter wave matching stubs...after all, many antennas have input
impedances quite far from "50" ohms...and input impedance gives no
clue to antenna efficiency.  ;^)

I understand the need for 450 ohm (or there abouts) twin lead...
afterall, in the good old days, real hams had voltage fed antennas
for their *all* frequency capabilities...and real end fed antennas
are supposed to have feed point impedances of 2,000-5,000 ohms...
huh, why not twin lead of 2000 ohms?  Well that is called open wire
line...but 450 ohm ladder line is *mechanically* stable, practical
to manufacture, and close enough for government work.

Well, where did 300 ohm come from?...Early TV and nobody really
understood what was going on, but 300 ohms made the input stage
design easier and *cheaper* in the fledgling TV industry....that
needed as much voltage multiplication as it could get for notoriously
low gain, high noise, parasitically-oscillating front end triodes.

And then there is the 72 ohm twin lead...but no 50 ohm, because the
extruding machine must have some slop room if you want a run of
"good" wire.

Who sez that? I say that!

73/Steve Modena/AB4EL  [e-mail]

------------------------------

Date: Tue, 21 Jun 1994 00:45:39 GMT
From: ihnp4.ucsd.edu!sdd.hp.com!col.hp.com!news.dtc.hp.com!hpscit.sc.hp.com!icon![e-mail]
Subject: You know its time to retire from the hobby when....
To: [e-mail]

.. you use "Destinated" in a sentence.

Greg.  KD6GKW

p.s. I'm already sunk...  My daughters have both tried the call sign trick
on their walkie-talkies.

------------------------------

Date: 20 Jun 1994 15:58:28 -0700
From: swrinde!emory!europa.eng.gtefsd.com!newsxfer.itd.umich.edu!zip.eecs.umich.edu!yeshua.marcam.com!news.kei.com!ssd.intel.com!chnews!ornews.intel.com!ornews.intel.com!@@ihnp4.ucsd.edu
To: [e-mail]

References <2tsecn$[e-mail]>, <2tsu7j$[e-mail]>, <[e-mail]>um
Subject : Re: Simplex spacing on 2mtr

In article <[e-mail]> [e-mail] (Greg Law) writes:
>In article <2tsu7j$[e-mail]> [e-mail] (prvalko) writes:

>>Not that going to .52 is an evil thing, but I guess I still think of it
>>as a "calling" channel... even if it's dead most of the time.  I think
>>that if you have invested in a multi-VFO, extened rcv/(tx),
>>multi-hundred dollar radio... you COULD try something like .55 or .58 or
>>7.42

>Here in Kentucky it's 15KHz, and I know what you mean about people generally
>rag-chewing on 146.520. I don't consider it a 'pet peeve' but I do keep in
>mind that 146.520 is a calling frequency -- make your call, then move on to
>another frequency.

146.52 is the "National Simplex" frequency, according to the ARRL Repeater
Guide and the Operating Manual.
It is not a calling frequency like 144.200 Mhz is for SSB.

I operate simplex most of the time on 2 meters.  If 146.52 was a calling
frequency then I wouldn't listen to it, wouldn't meet and talk to a
lotta cool non-repeater people, and wouldn't have near as much fun.
Nobody listens to Channel 9 on CB for the same reason.  If you want help
you call on the truck driver channel.
Many years ago the group here in PDX that owns the 146.94 repeater decided
to make it a "calling only" repeater.  A 30 sec. alligator was installed and
hams were actively discouraged from ragchewing or even chatting.
The result was that nobody listened to .94 in PDX except a select few who
enforced the "silence is golden" rule.  Out-of-towners who were used to
finding 146.94 as a popular frequency in other cities would only find silence
on the PDX .94 machine.  146.94 is the "National Repeater" frequency if you
look in the guide.  It is not a calling freq.  A calling frequency is where
people need to keep it short due to changing band conditions, long range
propagation effects, and differences in station equipment affecting weak
signal sensitivity.
Ham radio is for experimentation first.  Let's not adopt methods that promote
cliquishness.


--
[e-mail]  WA7LDV

------------------------------

End of Info-Hams Digest V94 #687
******************************