HDTenEightyP/NetNews huggingface dataset:
From: rc@cmr.ncsl.nist.gov (Robert Carpenter)
Newsgroups: rec.radio.amateur.misc
Subject: [Re:] 60 Hz Magnetic Fields in the House
Date: 18 Aug 1992 21:44:57 -0700
Organization: National Institute of Standards and Technology
	formerly National Bureau of Standards
NNTP-Posting-Host: ucsd.edu

Someone, with a VERY long address recently discussed the unbalanced 60 Hz
currents in house wiring. Either the reported measurements were wrong, or
that person should IMMEDIATELY DISCONNECT THE DEVICES ON THOSE CIRCUITS.
Such large unbalance currents seem extremely unusual to me, and would
indicate SERIOUS PROBLEMS. Why is there so much leakage? Ground-fault (GF)
isolators, a form of circuit breaker that is tripped by an unbalance in
the current going out the "hot" lead and coming back the "cold" lead, are
usually set to trip in the vicinity of 1 mA, not AMPERES. The unbalanced
current would be assumed to be flowing in the safety ground, or the hapless
person between the hot wire and ground - the GF isolator trips in either case.

For example, I rented a two-room plus bath and kitchenette unit in FG for
a DXpedition a few years ago. The French approach had a SINGLE GF isolator
for the whole unit. The GF isolator started tripping, so I went around
unplugging devices until it stopped tripping. The offending device was the
stove, which measured many thousands of ohms to ground - only a few tens of mA
leakage to the safety ground.

I suggest that the person make sure that the measuring techniques are sound,
because amperes of current in the safety ground are BAD NEWS.  There
WILL be amperes in the common of the 3-wire-Edison feed from the power
company, because it is the return conductor not a safety ground, and carries
the difference between the loads on the two 115 V halves of the overall 230 V
service, but that mag field will be small because the wires are close
together (and out of the house).

Did you make a calibration of the measuring system over the whole
current range of interest? Is the current input of the DVM sufficiently low
impedance? One-point "calibration" may not be adequate if you change DVM
scales (and input impedance?) during the measurement....

73, Bob W3OTC
(Not an Official posting)
From: gary@ke4zv.uucp (Gary Coffman)
Newsgroups: rec.radio.amateur.misc
Subject: Re: Artists
Date: 13 Aug 92 20:55:13 GMT
Reply-To: gary@ke4zv.UUCP (Gary Coffman)
Organization: Gannett Technologies Group

In article <920811104603.2100b96c@STC10.CTD.ORNL.GOV> SGU@stc10.ctd.ornl.gov writes:
>
>>Zack, I think you've just described the difference between tinkerers 
>>and engineers. A good product is *engineered*, the rest just happen
>>to work. The difference between art and engineering is that the artist
>>rarely understands why he's doing something while the engineer usually
>>does. At the very least he has rules of thumb that he follows.
>
>       [[[[STUFF DELETED]]]
>>Gary KE4ZV
>
>As an artist, I must loudly disagree with the statement by KE4ZV. Artists 
>do, indeed, understand why they are doing something.

Perhaps. Let's take an example. Eddy Van Halen taps a guitar string
rather than plucking it. He knows "why" he does it, because it gives
him a sound he likes. But he doesn't know "why" it gives him a different
sound than plucking. He just tinkered around until he found something
he liked and then kept doing it. On the other grasping member, give an
engineer an arbitrary acoustic waveform to generate, and he'll engineer
a method to do it *and* be able to tell you *why* it generates that
waveform. There are different levels of "why" operating here.

Gary KE4ZV
From: lancelot@cruzio.santa-cruz.ca.us
Newsgroups: rec.radio.amateur.misc
Subject: Sat Freqs
Keywords: Amateur Satellites, Frequencies
Date: Sun, 16 Aug 92 11:12:51 PDT
Reply-To: lancelot@cruzio.santa-cruz.ca.us
Distribution: usa


Where can I find a listing of amateur Satellite frequencies:
Beacons, uplink, downlink? thx. and '73...
-- 

Brett Breitwieser / KC6UPU @ N0ARY.#NOCAL.CA.USA / grid CM86XX
lancelot@cruzio.santa-cruz.ca.us   (...netcom!cruzio!lancelot)
425 Ninth Ave., Santa Cruz, CA. 95062-3915 / (408)475-9156 voice
"Volo ut syntaxis mea splendescat in litore, veniente aestate."
From: julian@bongo.UUCP (Julian Macassey)
Newsgroups: rec.radio.amateur.misc
Subject: Re: Empire of the Radio (PBS)
Date: 11 Aug 92 15:51:24 GMT
Reply-To: julian@bongo.info.com (Julian Macassey)
Organization: The Hole in the Wall  Hollywood California U.S.A.

In article <998@vk2bea.UUCP> michael@vk2bea.UUCP (Michael G. Katzmann) writes:
>
Discussion on TV Programme "Empire of the Air" deleted
>E.O.A. claimed that Armstrong invented the Superhet, but I grew up
>believing that a French inventor (who's name escapes me) was responsible.
>Does any one know the real story?

	I recall learning that Armstrong invented the superhet, FM and
I believe another receiver type, I am not sure if it was the TRF or
not. I learnt most of this stuff in the U.K., but I have to admit many
of my books were U.S. publications. Many from the dastardly ARRL, so I
could have been tainted. 

	I used to have a book, it may have been "Elements of Radio"
Marcus & Marcus, that had an appendix in the back with listing the
progress of radio (electronics for the young-uns) with all the 
great names in there.


-- 
Julian Macassey, julian@bongo.info.com  N6ARE@K6VE.#SOCAL.CA.USA.NA
742 1/2 North Hayworth Avenue Hollywood CA 90046-7142 voice (213) 653-4495
Newsgroups: rec.radio.amateur.misc
From: root@chamber.in-berlin.de (Patrick Wendt)
Subject: 150kHz - 30MHz receive-only antenna wanted.
Organization: Zombie's Burial Chamber, Berlin, West Germany.
Date: Mon, 17 Aug 1992 15:22:54 GMT

Hi !

Is there any kind of antenna available which covers the
whole area between 150kHz and 30MHz for receiving activity ?

I just wanna listen on shortwave-frequencies as I'm not
allowed to transmit, well, not yet. But listening can
bring up performance for example in CW.

I've not the possibility to use long wires or huge
antennas, so I look for a small receive-only antenna
as mentioned above.

Thanx in advance, 73 de Pat, DD6PF.

-- 
 ----------------------------------------------------------------------------
 -  Patrick Wendt  |   root@chamber.in-berlin.de |  Zombies Burial Chamber  -
 -      DD6PF      |   root@megiddo.in-berlin.de | Public UNIX Sys-V 386/33 -
 - - - - - - - - - | pwendt@opal.cs.tu-berlin.de | Data: +49 30 / 402 56 92 -
 - Berlin, Germany | HamRadio-BBS: DD6PF @ DB0GR | HST D.S. 14400bps V32bis -
 ----------------------------------------------------------------------------
     And all what we see or seem is but a dream within a dream.    E.A.P.
Newsgroups: rec.radio.amateur.misc
From: geertj@ica.philips.nl (Geert Jan de Groot)
Subject: Re: Orbiting FM Repeater ?
Keywords: satellite
Organization: Philips Consumer Electronics, Eindhoven, The Netherlands
Date: Sat, 15 Aug 1992 16:07:19 GMT

wdlee@ccwf.cc.utexas.edu (david lee) writes:

>Netfolks,
> My buddy just told me about an FM repeater on board a satellite.
>He said the uplink freq. is near 430 MHz, and the downlink
>is 145.985 MHz. What is the designation of this satellite?
>I need to look up its orbital elements in the NORAD lists.
>Do you know the designation? or the exact uplink freq?
>Thanks!
>David, N5TLZ

You have found one of the test-modes on RUDAK, the digital communication
experiment on board of OSCAR21. OSCAR21 is built into a Russian measuring
satelite, GEOS 1, that, because of the changes in Russia, isn't 
used now.

OSCAR21 has two linear transponders on it. Both of them are built in russia.
RUDAK-2, built in Germany by AMSAT-DL, is connected to one of them; it has 
several input frequencies and several output frequencies. It can transmit/
receive several different modes, including FSK and PSK. The modulation can
also be generated via software allowing modes like RSM. All those receiver/
transmitters are connected to a CPU consisting of a 65SC02 and a RTX2000
DSP processor. It can be programmed to do several different things. It really
is too complicated to explain all this, check the proceedings of the 
AMSAT-UK satelite colloquium or the 9th ARRL networking conference.

RUDAK-2 has had some difficulites. An amplifier in the input stage sometimes
starts to oscillate and it is very difficult to stop it. There have been
contact problems in an input attenuator. Because of the changing situation
in Russia, the command station for GEOS1 was closed for a while with
all on-board electronics switched off. The current limiter of the power supply
is set only 10% above average current draw: if RUDAK starts computing real hard,
it would draw more current (CMOS technology) and trip the current limiter.

On one of the input receivers, there is a direct analog audio output, i.e.
before the FSK demodulator. It is fed to the RTX2000 for test purposes. As a
test, the RTS2000 fed this signal to the FM transmitter directly, making
a FM relay. This was done mainly for testing, but was great fun to use.
Peter DB2OS told me he would start some other experiments soon and I have
not heard the  'repeater' since, just telemetry now.
I don't know when (if) the repeater would be restarted, it was only a test-mode,
but ask Peter himself via OSCAR22.

While at it, this year's AMSAT-UK colloquium had a great topic about Phase 3D,
the replacement for OSCAR10. Building this vehicle costs a lot of money.
The potential possibilities are enourmous: it will have a 10DB better
link budget as the older birds so it can be worked with an easier installation.
If you're looking for a Good Cause for earnings from a hamfest, Phase-3D
is it! Ask the AMSAT organisation in your country, or ask Ron Broadbent,
G3AAJ, Karl Meinzer, DJ4ZC, or AMSAT-NA what you can do..

Thanks, 73

Geert Jan PE1HZG

Newsgroups: rec.radio.amateur.misc
From: kwfriber@mtu.edu (Kenberg Frieth)
Subject: Re: Numeric address of HAM.NJIT.EDU
Organization: Michigan Technological University
Date: Wed, 19 Aug 1992 12:38:34 GMT

In article <m0mKixR-0009N7C@rsoft.rsoft.bc.ca> miles@mindlink.bc.CA (Ya'akov Miles) writes:
>The numeric address of HAM.NJIT.EDU is 128.235.1.10

While we're asking about the server, how do you use it?  I realize this is
probably a FAQ.
Ken Friberg n8pbe
From: skitch@nadc.navy.mil (M. Squicciarini)
Newsgroups: rec.radio.amateur.misc
Subject: Compack HF Beam
Date: 21 Aug 1992 03:48:13 -0700
Organization: UCSD Usenet Gateway
NNTP-Posting-Host: ucsd.edu

Dave wanted to know about the Butternut Butterfly so I'll tell you about
my experiences with that ant.  I've had it on the roof mounted on a tripod
for about 4 years now.  The beam arrived with about 100 parts to assemble
and I took my time and spent the next few days putting it together total 
time about 10 hours.  Getting it on the roof was no problem since it weighs 
very little.  The tune up requires alot of trial and error.  I was never
able to get the swr below 4:1 on 24 MHz but on all the other bands I was able
to get the adverties swr.  In the instructions they caution about keeping 
the ant away from any structure and much to my surprise when I rotated the 
ant the swr changed.  My guess is an interaction with the roof.  
How did it perform.  I can only camparede it to my ground mounted vertical and
the Butterfly was much better.  I know that's not much of a comparison but 
that all I had.  I've worked alot of DX and had alot of fun.  
Would I get another one.  I don't think I would.  I will put up a tower at
my next home and put up either a Quad or tri band Yagi.  
That was more then my 2 cents worth.  

	73 -- marty -- nr3z     	skitch@nadc.navy.mil
From: jdelancy@tecnet1.jcte.jcs.mil
Newsgroups: rec.radio.amateur.misc
Subject: HELP! In Need of ....
Date: 13 Aug 1992 19:06:22 -0700
Organization: UCSD Usenet Gateway
NNTP-Posting-Host: ucsd.edu


Can anyone point at a source, or have (for sale, beg, borrow, lend,
or give away) a relay for a Collins 30S1 Amp that's called the
PLATE CONTACTOR RELAY (in working order of course) ??

I also understand that a group called Collins Collectors exist.
Does anyone know about them, i.e. how to get to "know them"?

Any leads appreciated..

jd--K1ZAT/
From: ron@pilot.njin.net (Ron Natalie)
Newsgroups: rec.radio.amateur.misc
Subject: Re: HT in the car???
Date: 16 Aug 92 21:03:27 GMT
Distribution: rec
Organization: Rutgers Univ., New Brunswick, N.J.

> I am interested in making my HT more useable in my car.  I have
> thought about buying an antenna and then hooking it the antenna
> connector on the HT.

This in itself is an improvement.  That's the mode I've used for
quite some time.

> I have 12v from the car to give me at least 5w.
> What I was wondering is how I can boost the power to say 25w.

I don't know about homebrew, but there are certainly autosensing
amps that fit the bill perfectly.  My favorite is the RF Concepts
dual band amp that is installed in my wife's car.  It's really simple.
FT470->AMP->Antenna.  Automatically senses both bands.  Has receive
preamp as well.

-Ron
Newsgroups: rec.radio.amateur.misc
From: towne@unixg.ubc.ca ()
Subject: MFJ 1278 GOING BRAIN DEAD IN KISS MODE! PLEASE HELP!
Summary: ANY HELP IS APPRECIATED.
Keywords: WORKS IN AX.25 MODE, BUT DOES NOT IN KISS MODE.
Organization: University of British Columbia, Vancouver, B.C., Canada
Date: Thu, 20 Aug 1992 22:52:19 GMT

Well I have been using the MFJ 1278 for TCP/IP (KISS MODE) working 
flawlessly for the last year. Well now when I start up kiss mode and
start running msys or ka9q it works for a few seconds, and then
stop working. (Specifically it will not key the transmitter.)
PS-The battery inside the TNC is fine (first thing i checked).


The kicker:

If I use AX.25 mode and run normal packet it works perfectly.
I called MFJ and they said that they want me to ship it to them
for a modification for $60 US. (PS it is out of warranty)

IF you even think that you might have an idea, I would appreciate
any help, suggestions, hints.

Sincerely
Jerry Sturge
From: shaw@email.ncsc.navy.MIL (Shaw)
Newsgroups: rec.radio.amateur.misc
Subject: Dentron Clipperton-L
Date: 14 Aug 1992 12:04:26 -0700
Organization: UCSD Usenet Gateway
NNTP-Posting-Host: ucsd.edu

Dentron manufactured the Clipperton-L linear about 10 years ago.  My amp has a power supply problem with one or more open capacitors in the voltage doubler circuit. I need information on whether Dentron or someone else has capacitors available. Appararent
l
y Dentron is out of business (no telephone) and the Sprague capacitors are proprietary so no one stocks the 100uF, 500V electrolytic capacitors. HELP!

BOB AC4MI (not a Tibet callletter)
Newsgroups: rec.radio.amateur.misc
From: sheth@calvin.cs.scarolina.edu (Vipul Arun Sheth)
Subject: Need info. on equipment
Keywords: info help equipment
Organization: USC  Department of Computer Science
Date: 17 Aug 92 18:52:34 GMT



Hi everybody,
I am very much new to the world of amateur radio.
I am interested in knowing details on the kind of equipment required to communicate with other HAM's in India from the U.S and also the approx. cost of such equipment .

Please reply to my e-mail address as i do not read this group regularly

Thanks
Newsgroups: rec.radio.amateur.misc
Subject: PIN Diode Sources?
From: fred-mckenzie@ksc.nasa.gov (Fred McKenzie)
Date: 21 Aug 92 09:46:15 EST
Followup-To: rec.radio.amateur.misc
Distribution: world
Organization: NASA/Kennedy Space Center, Florida

I'm interested in building the "Dual Duckie" direction finding system.  It
was published in QST several years ago, and has appeared in at least one
edition of the ARRL Handbook.  I believe there was someone selling a kit of
parts for it, as well.

I haven't been able to locate a PIN diode for this project.  There were
three or four listed in the article, but none are available from my normal
sources.  Does anyone know of such a source?  Is anyone still selling the
kit for the "Dual Duckie"?

fred-mckenzie@ksc.nasa.gov
Newsgroups: rec.radio.amateur.misc
From: ewing-martin@CS.YALE.EDU (Martin Ewing)
Subject: Re: QST, in my opinion...
Organization: Yale Univ. Sci & Eng Comp Facility, New Haven CT 06520
Date: Sun, 16 Aug 1992 22:58:23 GMT

In article <pschleck.713810554@cwis> pschleck@cwis.unomaha.edu (Paul W Schleck KD3FU) writes:
>ewing-martin@CS.YALE.EDU (Martin Ewing) writes:
>
>>One thing that QST might do would be to have a "My turn" column for
>>general opinion pieces, including hopefully some from Fred.
>
>>73, Martin, AA6E 
>
>They do, it's called the Op-Ed page and was just recently added.  Maybe
>some E-mail to the league at 2155052@mcimail.com (with your US Mail
>address) might send a writer's guide to a prospective author.
>
>73, Paul W. Schleck, KD3FU
>
>pschleck@unomaha.edu
>

Oops! You're right of course.  But the reason I overlooked those columns
may be that their content is really predictable.  Usually they're in
the spirit of "rotten operating", The Old Man, Wouff Hong (sp?), and
all that.  A lively op-ed page would have some thoughtful critiques
of ARRL, QST, demographics -- and an (at least somewhat) iconoclastic
style.  E.g. the famous piece from Fred.  (Maybe W2NSD -10 db.)

QST -- you're not very pithy!

73, Martin


Newsgroups: rec.radio.amateur.misc
From: paulb@harley.tti.com (Paul Blumstein)
Subject: Re: The "other" D. Wills
Keywords: aka, impersonator, etc.
Organization: Are you kidding?
Distribution: usa
Date: Fri, 14 Aug 1992 00:03:07 GMT

In article <sc3mhj_.wills@netcom.com> wills@netcom.com (Dave Wills) writes:
+Someone has been posting to this newsgroup and signing "D. Wills."
+
+I personally disavow any knowledge of the identity of this person
+who 'claims' to be the REAL D. Wills.  Any statements he has regarding
+Morris Code are his alone, and not supported by me.
+
+Besides, my cat knows Morris Code, and this is the only way I can get
+him to listen.
+
+The "Other" REAL D. Wills

One of the worst cases of schizophrenia that I ever saw.
____________________________________________________________________________
				I AM THE RNA!
----------------------------------------------------------------------------
 Paul D. Blumstein, paulb@harley.tti.com, DoD #36, ABATE, AMA, HOG, KD6LAA
(note paulb@tti.com no longer works; paulb@ttidca.tti.com goes away soon)
            Transaction Technology, Inc., Santa Monica, CA
From: vail@tegra.COM (Johnathan Vail)
Newsgroups: rec.radio.amateur.misc
Subject: Re: Antenna drilling
Date: 13 Aug 92 21:15:02 GMT
Organization: Tegra, Inc., Billerica, MA
In-reply-to: brian@ucsd.edu's message of 13 Aug 92 16:16:25 GMT


In article <16e1spINNcek@network.ucsd.edu> brian@ucsd.edu (Brian Kantor) writes:

   The best tool for drilling an antenna hole in a car is one made for the
   purpose.  The Motorola antenna tool is superb - it starts with just a
   centerpunched dimple, drills the pilot hole, then saws out the 3/4"
   hole, and polishes the paint off the perimeter of the hole so that the
   NMO mount makes good contact, all without snagging the headliner
   - and all in one operation!

and it is magnetic for removing the cutout and some chips.

   Your local two-way shop probably has one.  Perhaps they'll let you
   borrow it, or maybe they'll do the hole for you for a nominal fee.

or just take your car with the headliner loose and the hole already
"dimpled" and buy the antenna mount from a 2-way shop. they should be
happy to drill for you.  it literally takes less than a minute for
them if you have it ready beforehand.

then you take the time later to run the cable, etc.

worked for me.

   Otherwise, use a Greenlee punch.  You'll wish you had.

definately the next best thing.



"Don't Ever Antagonize The Horn"
 _____
|     | Johnathan Vail     vail@tegra.com     (508) 663-7435
|Tegra| jv@n1dxg.ampr.org    N1DXG@448.625-(WorldNet)
 -----  MEMBER: League for Programming Freedom (league@prep.ai.mit.edu)
From: brian@ucsd.edu (Brian Kantor)
Newsgroups: rec.radio.amateur.misc
Subject: Re: Warning: Not-so-linear Amplifiers
Date: 13 Aug 1992 16:32:06 GMT
Organization: The Avant-Garde of the Now, Ltd.
NNTP-Posting-Host: ucsd.edu

The "CB linear" amplifiers I'm familiar with (from 20 years ago, when a
company I worked for was shipping 3,000 a month) use two transistors in
a push-pull circuit.  The input and output are ferrite transformers -
couple of turns of teflon hookup wire through some brass rivets soldered
to two pieces of circuit board.  There are tuning caps at both the input
and the output to fiddle out component variation and stray capacity, but
the amp really isn't a tuned device.

Although there isn't any static bias, they are self-biasing and run
class B or thereabouts.  If not overdriven, they are really pretty good
and will amplify an AM signal without significant distortion.  If you
overdrive them (more than about 5 watts in) they'll spew chunks.

An Argonaut could drive them to 100 watts on 10 meters, and with a fan
on the amp heatsink, I was able to get 500 watts out on 40 meter CW.

I still see them at the swapmeets.  Apparently they're quite highly valued.

That company later went on to design and sell the only CB Linear
featuring a 4CX250 in it.  500 watts of AM output (claimed).  I dunno
how many of THOSE they sold - I'd changed jobs by the time that one hit
the market.
		- Brian
Newsgroups: rec.radio.amateur.misc
From: tlc20700@uxa.cso.uiuc.edu (Thomas L. Carney)
Subject: Re: Excellent customer service story
Organization: University of Illinois at Urbana
Date: Sat, 22 Aug 1992 22:20:49 GMT

mikemr@microsoft.COM writes:

>I recently bought an old, used Bird model 4314 peak-reading
>wattmeter. It worked fine in average-power mode (equivalent
>to the model 43) but didn't work in peak-power mode. I called
>Bird and spoke with one of their customer service people. He
>not only researched the problem and called me back with several
>possible solutions, but he found an old manual for the meter
>(it's been out of production for a long time), photocopied it
>and mailed it to me. All this for no charge, for a meter that
>Bird didn't sell me. This company definitely know the meaning
>of "service."

Hey KENWOOD, ICOM, YAESU!!!!!!   Listen up!!!!

Some American companies have found ways to beat the Japanese in the 
microwave, SATCOM, and fiber optic industries... better customer 
service... and it looks like it's spreading to amateur radio.