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1994-11-13
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Date: Wed, 18 May 94 04:30:07 PDT
From: Info-Hams Mailing List and Newsgroup <info-hams@ucsd.edu>
Errors-To: Info-Hams-Errors@UCSD.Edu
Reply-To: Info-Hams@UCSD.Edu
Precedence: Bulk
Subject: Info-Hams Digest V94 #541
To: Info-Hams
Info-Hams Digest Wed, 18 May 94 Volume 94 : Issue 541
Today's Topics:
Atlas 210X Info Wanted
Azden AZ61 Feedback
Daily Summary of Solar Geophysical Activity for 16 May
Man named Loomis invented radio?
Sonobuoy conversion articles
subscribe info-ham Laurent PELLISSIER
Send Replies or notes for publication to: <Info-Hams@UCSD.Edu>
Send subscription requests to: <Info-Hams-REQUEST@UCSD.Edu>
Problems you can't solve otherwise to brian@ucsd.edu.
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, 17 May 94 19:48:56 GMT
From: news.mtholyoke.edu!nic.umass.edu!usenet@uunet.uu.net
Subject: Atlas 210X Info Wanted
To: info-hams@ucsd.edu
In Article <leigh.769140754@coyote>
leigh@coyote.rain.org (Leigh Marrin) writes:
>I've been loaned an old Atlas 210X HF transciever, and have an option to
>buy it for a mere 50 dollars.
>Using a dummy load, it puts about 50 watts of CW out. But using a Hustler
>40 meter coil & whip, power drops down to about QRP levels, even though
>the SWR is around 1.5:1. An old-timer with experience with the Atlas
>says this is fairly common; he says the early solid state rigs did not
>like loaded whips, and required a special matching network. (He also
>says that a conventional antenna tuner won't work.)
The loaded whip, even when resonant, will have an impedance much lower than
50 ohms. One of the accessories originally available from Atlas was an
impedance transformer to raise the impedance of a mobile whip. You could
probably make one using a large toroid core. But there is no reason a tuner
shouldn't work if it properly transforms the whip impedance to 50 ohms.
I used an Atlas 210X last year when I was operating in Nicaragua
as YN1ASW. I used an MFJ 949E tuner to load a variety of antennas. I
did have one difficulty, and that was parasitic oscillations that developed
on some bands as I increased the power level. I determined that these
oscillations were due to the fact that any particular load, whether coupled
directly or through an antenna tuner, might present a complex reactive
impedance at some frequency, even though it presents a resistive impedance
at the desired operating frequency. Such oscillations did nort occur with
a dummy load.
I was able to partially tame these problems by putting a one or two watt
resistor of several thousand ohms resistance in parallel with the antenna
tuner. At the desired frequency this would absorb a negligible part of the
output, since it was effectively in parallel with a 50 ohm load, but at
frequencies where the antenna and/or tuner looked like a reactive load
this contributed some damping and helped to stabilize the rig. This wasn't
completely effective for all antennas and power levels, but I had limited
access to parts for trying more elaborate solutions.
You'll probably also find that output is very sensitive to supply voltage,
and will be substantially lower at 11.8 volts than at 13.6 volts.
>Also, on the large selector knob on the front panel, there is a setting
>marked "CAL". I can find no mention in the manual as to what "CAL" is
This turns on the calibrator -- you should hear a loud signal every 100
khZ if it is working properly.
>Any other input on the Atlas 210X would be appreciated. ...
Hi Manuals had a rather good packet on the 210/215 at the time I acquired
mine, in mid 1992. They had a number of factory modifications in the package.
The earlier your particular 210X the more useful these will be, since most of
the mods were incorporated into later production units. You'll have to send
in your $2 for a Hi Manuals catalog to see if they currently have the Atlas
info.
73 and good luck,
Al, N1AW
Albert S. Woodhull
Hampshire College, Amherst, MA, USA
awoodhull@hamp.hampshire.edu
------------------------------
Date: 18 May 94 03:23:18 GMT
From: news-mail-gateway@ucsd.edu
Subject: Azden AZ61 Feedback
To: info-hams@ucsd.edu
Hi All,
PHD Hamfest is this weekend in Kansas City, and I need to make a
buying decision on this rig. Does anyone own one, and if so, what
are your opinions - pro/con?
Are there any problems with this HT?
Is the price reasonable (features etc)?
etc.. etc.. etc..
I have read the spec sheet, but have not seen one. HRO does not
carry Azden. Associated Radio (my favorite candy store) sells Azden, but
they do not have this particular unit in stock.
Any feedback would be greatly appreciated.
73 de KB0LRB
Lynn Geitgey
geitgey@ukanvm.cc.ukans.edu
------------------------------
Date: 17 May 94 04:29:01 GMT
From: agate!library.ucla.edu!news.mic.ucla.edu!unixg.ubc.ca!quartz.ucs.ualberta.ca!alberta!ve6mgs!usenet@ucbvax.berkeley.edu
Subject: Daily Summary of Solar Geophysical Activity for 16 May
To: info-hams@ucsd.edu
/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
DAILY SUMMARY OF SOLAR GEOPHYSICAL ACTIVITY
16 MAY, 1994
/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
(Based In-Part On SESC Observational Data)
SOLAR AND GEOPHYSICAL ACTIVITY INDICES FOR 16 MAY, 1994
-------------------------------------------------------
!!BEGIN!! (1.0) S.T.D. Solar Geophysical Data Broadcast for DAY 136, 05/16/94
10.7 FLUX=091.4 90-AVG=087 SSN=058 BKI=4533 5433 BAI=026
BGND-XRAY=A7.7 FLU1=1.7E+06 FLU10=2.3E+04 PKI=4454 6433 PAI=030
BOU-DEV=042,070,031,039,072,046,033,022 DEV-AVG=044 NT SWF=00:000
XRAY-MAX= B5.3 @ 1011UT XRAY-MIN= A5.6 @ 2009UT XRAY-AVG= B1.1
NEUTN-MAX= +002% @ 0445UT NEUTN-MIN= -003% @ 1710UT NEUTN-AVG= -0.2%
PCA-MAX= +0.2DB @ 1905UT PCA-MIN= -0.5DB @ 0150UT PCA-AVG= +0.0DB
BOUTF-MAX=55346NT @ 0005UT BOUTF-MIN=55295NT @ 1643UT BOUTF-AVG=55318NT
GOES7-MAX=P:+000NT@ 0000UT GOES7-MIN=N:+000NT@ 0000UT G7-AVG=+078,+000,+000
GOES6-MAX=P:+140NT@ 1821UT GOES6-MIN=N:-104NT@ 0601UT G6-AVG=+104,+031,-044
FLUXFCST=STD:090,095,095;SESC:090,095,095 BAI/PAI-FCST=020,015,010/020,015,010
KFCST=3324 4223 2224 4222 27DAY-AP=016,010 27DAY-KP=5344 2233 3333 2212
WARNINGS=
ALERTS=
!!END-DATA!!
NOTE: The Effective Sunspot Number for 15 MAY 94 was 22.3.
The Full Kp Indices for 15 MAY 94 are: 3- 3o 5+ 6o 4o 3o 3+ 4-
The 3-Hr Ap Indices for 15 MAY 94 are: 14 15 54 80 30 15 20 23
Greater than 2 MeV Electron Fluence for 16 MAY is: 3.9E+08
SYNOPSIS OF ACTIVITY
--------------------
Solar activity was very low. Region 7723 (N05W26)
was the only flare producer with a pair of B-class subflares
over the past 24 hours.
Solar activity forecast: solar activity is expected to be
very low to low. Region 7722 (N08E12) still has the best,
although slim, chance of producing C-class flares.
The geomagnetic field has been at unsettled to minor storm
levels over the past 24 hours. High latitude stations saw
active to severe storm conditions. Activity is most likely
because of a well positioned coronal hole. Energetic electron
flux (GT 2 mev) ranged from normal to high levels through the
period.
Geophysical activity forecast: the geomagnetic field is
expected to be unsettled to active levels in middle latitudes
and active to minor storm levels at high latitudes for the next
24 hours. Activity is expected to subside to mostly unsettled
thereafter.
Event probabilities 17 may-19 may
Class M 01/01/01
Class X 01/01/01
Proton 01/01/01
PCAF Green
Geomagnetic activity probabilities 17 may-19 may
A. Middle Latitudes
Active 20/30/20
Minor Storm 25/20/10
Major-Severe Storm 10/10/05
B. High Latitudes
Active 25/25/25
Minor Storm 25/20/10
Major-Severe Storm 10/10/05
HF propagation conditions were near-normal for the low and
middle latitude paths. High and polar latitude paths were
generally below-normal with an excursion to useless propagation
conditions for transpolar and transauroral paths between
approximately 12:00 UTC and 15:00 UTC due to a period of major
to severe geomagnetic storming during that interval.
Conditions then improved throughout the remainder of the day
and were beginning to approach near-normal values by the end of
the UTC day. Additional periods of minor signal degradation
may be observed over the high and polar latitude paths over the
next 24 hours. Conditions should begin improving more solidly
over the next 24 to 48 hours as this disturbance subsides
toward quieter levels.
COPIES OF JOINT USAF/NOAA SESC SOLAR GEOPHYSICAL REPORTS
========================================================
REGIONS WITH SUNSPOTS. LOCATIONS VALID AT 16/2400Z MAY
------------------------------------------------------
NMBR LOCATION LO AREA Z LL NN MAG TYPE
7722 N08E12 122 0380 DKO 06 010 BETA
7723 N05W26 160 0010 HRX 02 002 ALPHA
7725 N04W09 143 0000 AXX 00 001 ALPHA
7726 N10E24 110 0010 AXX 05 005 ALPHA
7720 S08W68 202 PLAGE
7721 S12W11 145 PLAGE
REGIONS DUE TO RETURN 17 MAY TO 19 MAY
NMBR LAT LO
7710 S14 041
LISTING OF SOLAR ENERGETIC EVENTS FOR 16 MAY, 1994
--------------------------------------------------
BEGIN MAX END RGN LOC XRAY OP 245MHZ 10CM SWEEP
NONE
POSSIBLE CORONAL MASS EJECTION EVENTS FOR 16 MAY, 1994
------------------------------------------------------
BEGIN MAX END LOCATION TYPE SIZE DUR II IV
NO EVENTS OBSERVED
INFERRED CORONAL HOLES. LOCATIONS VALID AT 16/2400Z
---------------------------------------------------
ISOLATED HOLES AND POLAR EXTENSIONS
EAST SOUTH WEST NORTH CAR TYPE POL AREA OBSN
NO DATA AVAILABLE FOR ANALYSIS
SUMMARY OF FLARE EVENTS FOR THE PREVIOUS UTC DAY
------------------------------------------------
Date Begin Max End Xray Op Region Locn 2695 MHz 8800 MHz 15.4 GHz
------ ---- ---- ---- ---- -- ------ ------ --------- --------- ---------
15 May: 1722 1739 1757 B6.0 SF 7726 N09E39
REGION FLARE STATISTICS FOR THE PREVIOUS UTC DAY
------------------------------------------------
C M X S 1 2 3 4 Total (%)
-- -- -- -- -- -- -- -- --- ------
Region 7726: 0 0 0 1 0 0 0 0 001 (100.0)
Uncorrellated: 0 0 0 0 0 0 0 0 000 ( 0.0)
Total Events: 001 optical and x-ray.
EVENTS WITH SWEEPS AND/OR OPTICAL PHENOMENA FOR THE LAST UTC DAY
----------------------------------------------------------------
Date Begin Max End Xray Op Region Locn Sweeps/Optical Observations
------ ---- ---- ---- ---- -- ------ ------ ---------------------------
NO EVENTS OBSERVED.
NOTES:
All times are in Universal Time (UT). Characters preceding begin, max,
and end times are defined as: B = Before, U = Uncertain, A = After.
All times associated with x-ray flares (ex. flares which produce
associated x-ray bursts) refer to the begin, max, and end times of the
x-rays. Flares which are not associated with x-ray signatures use the
optical observations to determine the begin, max, and end times.
Acronyms used to identify sweeps and optical phenomena include:
II = Type II Sweep Frequency Event
III = Type III Sweep
IV = Type IV Sweep
V = Type V Sweep
Continuum = Continuum Radio Event
Loop = Loop Prominence System,
Spray = Limb Spray,
Surge = Bright Limb Surge,
EPL = Eruptive Prominence on the Limb.
** End of Daily Report **
------------------------------
Date: 18 May 94 05:46:35 GMT
From: agate!howland.reston.ans.net!gatech!news-feed-1.peachnet.edu!emory!cherry.atlanta.com!nanovx!wa4mei!ke4zv!gary@ucbvax.berkeley.edu
Subject: Man named Loomis invented radio?
To: info-hams@ucsd.edu
In article <1994May17.145749.20098@kocrsv01.delcoelect.com> c22jrb@kocrsv01.delcoelect.com (Jim Buchanan) writes:
>In article <2r8f28$ha2@vixen.cso.uiuc.edu>, btbg1194@uxa.cso.uiuc.edu (Bradley T Banko) writes:
>[...]
>> I read something recently that a man named Loomis might have
>> "invented" radio in the late 1800's before Marconi & Hertz et al.
>[...]
>> Does anybody else know more about this?
>
>Dr. Loomis was a dentist. If I remember correctly, he used a non-powered
>system where he simply connected his "transmitting" antennae to ground via
>a telegraph key. I assume that at all time a very small potential
>difference existed between the antennae and ground, when the key opened and
>closed, a small current flowed and excited the antennae at its resonant
>frequency. I'm not sure what he used as a detector, but it did work.
Loomis took advantage of the roughly 300 volts/meter potential in the
atmosphere to activate his transmitter. The current flow is small, except
during thunderstorms, but it was sufficient to generate a detectable signal
at a distance in the days before widespread use of electricity.
Nathan B. Stubblefield's work was much further advanced. He sent *voice*
signals over distances greater than 30 miles before Marconi et al sent
spark signals. His system was powered by batteries and apparently worked
on the principle of sheet conductance. (He was very secretive about the
exact details.) He conducted a demonstration for Congress where he
communicated by voice with a ship in the Potomac from the shore. His was
the first "underground" radio station.
And of course there was Tesla. He had radio controlled boats operating
in the lake of Central Park in one demonstration well before Marconi
generated his first sparks. Tesla was fasinated by resonance phenomina.
Gary
--
Gary Coffman KE4ZV | You make it, | gatech!wa4mei!ke4zv!gary
Destructive Testing Systems | we break it. | uunet!rsiatl!ke4zv!gary
534 Shannon Way | Guaranteed! | emory!kd4nc!ke4zv!gary
Lawrenceville, GA 30244 | |
------------------------------
Date: 18 May 1994 02:35:12 GMT
From: ihnp4.ucsd.edu!library.ucla.edu!psgrain!charnel.ecst.csuchico.edu!olivea!news.bu.edu!dartvax.dartmouth.edu!usenet@network.ucsd.edu
Subject: Sonobuoy conversion articles
To: info-hams@ucsd.edu
In article <2835@bridge2.NSD.3Com.COM>
peter_simpson@3com.com (Peter Z. Simpson) writes:
> Here's what I found using "From Beverages to OSCAR"...a ham radio article
> database from Didah Publishing (they advertise in QST and Communications Quarterly,
> I believe):
>
> 5 FQ XTAL DECK FOR THE SONOBABY Ham Radio 10/72 p.26
> CONVERTING SSQ-23A SONOBUOY TO 2MFM 73 Magazine 3/70 p.96
> SONOBUOY-VHF FM XMTR Ham Radio 10/71 p.8
> SONOBUOY-VHF FM XMTR (feedback) Ham Radio 12/71 p.96
Thanks a lot! The buoys I've got are all SSQ-23A, so it looks like
this will be a tremendous help! Now, all I've got to do is remember to
get down to the inter-library loan desk tomorrow...
---
=======================================================================
Kenneth E. Harker N1PVB Dartmouth College Amateur Packet Radio
kenneth.e.harker@dartmouth.edu Hinman Box 1262 n1pvb@w1et.nh.usa.na
(603) 643-5716 Hanover, NH 03755 or n1pvb-5 on 144.99
=======================================================================
(PGP Public Key now available on request)
------------------------------
Date: 18 May 94 09:05:25 GMT
From: news-mail-gateway@ucsd.edu
Subject: subscribe info-ham Laurent PELLISSIER
To: info-hams@ucsd.edu
subscribe info-ham Laurent PELLISSIER
------------------------------
Date: 18 May 94 06:12:20 GMT
From: agate!howland.reston.ans.net!gatech!swrinde!emory!cherry.atlanta.com!nanovx!wa4mei!ke4zv!gary@ucbvax.berkeley.edu
To: info-hams@ucsd.edu
References <94137.114515TONY@wvnvm.wvnet.edu>, <1994May17.122113.1@dcd00.fnal.gov>, <2rb0eq$srh@cville-srv.wam.umd.edu>
Reply-To : gary@ke4zv.atl.ga.us (Gary Coffman)
Subject : Re: Need Advice
In article <2rb0eq$srh@cville-srv.wam.umd.edu> ham@wam.umd.edu (Scott Richard Rosenfeld) writes:
>How about a nice, older HW-101 or IC-701 or Kenwood TS-120/130S?
>Why only 2 meters? People just don't get it. VHF stuff is expensive,
>and who wants older VHF equipment (for the most part)? Older HF stuff
>is still very current and functional - and cheap, AND you can work
>around the world with it. When did that cease to be the driving
>force in amateur radio? Two meters IS all that's left :-(
VHF/UHF is in general much more useful and much more popular than HF
for genuine communications. Older equipment is very much available,
servicable, and cheap, but newer equipment does tend to attract many
buyers. Because VHF/UHF *is* so much more popular than HF, there is a
much wider variety of new equipment from which to choose.
If budget is a consideration, however, I just bought a VHF 90 watt
transportable rig at Dayton for $8. It works too! It's a GE Master
Exec in a GE transport case with a TPL amp and marine battery. Just
add an antenna and you're in business. Or, if you must buy Japanese,
I saw dozens of IC2s for sale for under $100. That's a perfectly
servicable belt rig, better than many current models.
What's the point of "working around the world" if you don't have anything
interesting to *say* to the other operator? Just exchanging meaningless
signal reports isn't interesting. It has been done to death already by
others. On VHF/UHF you're much more likely to establish long term friendships
with other operators, and to engage them in interesting conversations on
a near daily basis. That's rather rare on HF, except on 75 meters, and
that's such a zoo of noise and interference that the contacts are rarely
pleasant.
Gary
--
Gary Coffman KE4ZV | You make it, | gatech!wa4mei!ke4zv!gary
Destructive Testing Systems | we break it. | uunet!rsiatl!ke4zv!gary
534 Shannon Way | Guaranteed! | emory!kd4nc!ke4zv!gary
Lawrenceville, GA 30244 | |
------------------------------
Date: 18 May 94 08:09:35 GMT
From: dog.ee.lbl.gov!overload.lbl.gov!agate!howland.reston.ans.net!cs.utexas.edu!not-for-mail@ucbvax.berkeley.edu
To: info-hams@ucsd.edu
References <1994May16.141525.863@pacs.sunbelt.net>, <CpwzA0.3zt9@austin.ibm.com>, <rogjdCpy6yC.Gq9@netcom.com>
Subject : Re: HAM RADIO RUDENESS
rogjd@netcom.com (Roger Buffington) writes:
>blood@austin.ibm.com wrote:
>: Ive decided to quit saving for a HF rig after following this discussion.
>Don't feel that way. Get the HF rig and ignore the few jerks who are
>rude on the air. There are not many of them.
My advice would be to move to Europe. At least when the people are rude,
it is not in english :)
(Might be in italian but I didn't say that) :)
------------------------------
End of Info-Hams Digest V94 #541
******************************