Date: Tue, 15 Feb 94 04:30:31 PST
From: Ham-Equip Mailing List and Newsgroup <ham-equip@ucsd.edu>
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Subject: Ham-Equip Digest V94 #33
To: Ham-Equip
Ham-Equip Digest Tue, 15 Feb 94 Volume 94 : Issue 33
Today's Topics:
Comments on MFJ ant. bridges and freq. counters
Experience with Ray-O-Vac "Renewal" batteries - disappointment (2 msgs)
GLB Channelizer GLB400B
Ground Plane antenna gain
HT Recs out there?
Looking for LOGIKEY keyer
Opinions wanted on mobile dual-banders
sell:laptop,KAM ALL MODE,c64/1541drive
sell johnson ranger?
Vertical Antennas
Yaesu FT-5100 packet connection
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----------------------------------------------------------------------
Date: Mon, 14 Feb 1994 16:13:49 GMT
From: ncrgw2.ncr.com!ncrhub2!whq2-top!SIDBTST1!Ronald.D.Doyle@uunet.uu.net
Subject: Comments on MFJ ant. bridges and freq. counters
To: ham-equip@ucsd.edu
Hi and thanks for reading this.
I am looking into buying an antenna bridge from MFJ. Does anybody have any experience
good or bad with MFJ 203, 205, 207, 208, and 209 bridges ?
I am also looking at the MFJ 249 Frequency Counter. Any comments about this piece of
gear will also be greatly appreciated.
Tnx again. I will repost any comments that I get so all will benifit.
73 - Ron Doyle N8VAR
---------------------------------------------------------------
Ronald Doyle, Worldwide Customer Services, AT&T GIS- Dayton
NCR: 622-3179 <Ronald.Doyle@DaytonOH.NCR.COM>
(513) 445-3179 FAX: 445-7542
------------------------------
Date: 14 Feb 94 15:13:20 GMT
From: library.ucla.edu!europa.eng.gtefsd.com!howland.reston.ans.net!vixen.cso.uiuc.edu!newsrelay.iastate.edu!news.iastate.edu!pv6624.vincent.iastate.edu!seldon@network.ucsd.edu
Subject: Experience with Ray-O-Vac "Renewal" batteries - disappointment
To: ham-equip@ucsd.edu
In <dgfCL6L1t.Mx1@netcom.com> dgf@netcom.com (David Feldman) writes:
...<stuff deleted>...
>I have not tried the other size cells. I'm posting this here because this test
>was a pre-cursor to use in some ham (ATV portable) applications where I needed
>higher energy storage density by weight but did not need numerous recharge
>cycles (compared to NiCads). I believe they are not suitable for this
>application based on my test.
>Comments? 73 Dave WB0GAZ
You could always try the same test with 8 batteries in a series parallel
configuration. This should reduce the current drain on each individual
battery, and still provide you with 6 volts.
Good Luck, and 73 Nick N9STF
--
Seldon
seldon@iastate.edu
14, 15. . . What ever it takes.
------------------------------
Date: Sun, 13 Feb 1994 21:01:02 GMT
From: ucsnews!sol.ctr.columbia.edu!howland.reston.ans.net!agate!library.ucla.edu!csulb.edu!csus.edu!netcom.com!dgf@network.ucsd.edu
Subject: Experience with Ray-O-Vac "Renewal" batteries - disappointment
To: ham-equip@ucsd.edu
I purchased four "D" cells and their recharger. My application requires
6VDC at about 5 amps continuous. When new, the cells decreased from 6V
(series connected) output to about 4V output rather linearly during about
30 minutes of loading. I recharged the cells as directed, and repeated the
usage. After only 15 charge/discharge cycles, the battery reached 4V output
after only 5 minutes of usage (again, a linear time/voltage discharge).
I looked for one "weak" cell in the string, but each cell was similar to
the others at any given point in time. I tried this test only on one set of
4 cells purchased at the same time from a local retailer.
Does this experience match yours? Is 5 amps too much to ask of one of their
"D" cells? I expected the cells to have greater energy storage capacity than
4AH 1.2V D-cell nicads, but in fact this doesn't seem to be the case in my
experiment. The cells are not characterized on their package (unlike a NiCad)
but, believing the advertisements and intuition, I would have expected >4AH
by a considerable margin. Has anyone characterized these cells objectively?
I have not tried the other size cells. I'm posting this here because this test
was a pre-cursor to use in some ham (ATV portable) applications where I needed
higher energy storage density by weight but did not need numerous recharge
cycles (compared to NiCads). I believe they are not suitable for this
application based on my test.
Comments? 73 Dave WB0GAZ
------------------------------
Date: 14 Feb 94 18:19:00 GMT
From: news-mail-gateway@ucsd.edu
Subject: GLB Channelizer GLB400B
To: ham-equip@ucsd.edu
I pick up a GLB400B channelizer and am wondering if anyone has any
information regarding this unit. I believe it is a synthesizer meant to
operate with crystal type 2m transceivers. I would appreciate any
information.
Thank you.
CF Lee, ve7lcf
------------------------------
Date: Wed, 9 Feb 1994 10:00:13 GMT
From: agate!howland.reston.ans.net!pipex!bbc!ant!boyer@network.ucsd.edu
Subject: Ground Plane antenna gain
To: ham-equip@ucsd.edu
I can tell you all this much about 1/4 wave aerials. They usually have less
gain than 1/2 dipole, because of ground imperfections. However if your
aerial uses your transmission line, then this may appear the other way
around. 1/4 wave ground plane aerials are 1/2 wave dipoles if you have a
perfectly conducting infinte ground.
John b
John.boye@rd.eng.bbc.co.uk
------------------------------
Date: 13 Feb 1994 17:18:35 GMT
From: agate!howland.reston.ans.net!news.moneng.mei.com!uwm.edu!msuinfo!cravitma@ames.arpa
Subject: HT Recs out there?
To: ham-equip@ucsd.edu
On 12 Feb 1994 23:06:18 GMT, strange alien beings caused Jesse L Wei (jlw3@cec3.wustl.edu) to write:
> I've been looking primarily at dual-banders, especially the ICOM IC-W2A.
> Any complaints or complements for this or Kenwood's or Yaesu's or Alinco's?
> I also like the look of having a wide band receiver as the IC-2SRA, but
> as I already have a PRO-43, I know I don't need it. What are your
> recommendations? Go new? Go used (I think that there will be an ARRL
> convention in Dallas area this summer, is that right?)???
I have a Yaesu FT-470 dual-bander that I am quite happy with, and the model
that replaced it (the FT-530 looks quite nice as well). I have also heard a
lot of good things about the Alinco DJ-580, which looks like a wholely
excellent radio for not an exorbitant amount of money. The Icoms, in my
opinion, tend to be a little pricey.
> I'm kind of flexible on price range--I'm willing to spend a little more
> if I know I'll be using it for a LONG time.
The FT-530 and Alinco DJ-580T are both running in the $375-450 range. I'm
not sure how much the FT-470 that I have is since it was a gift, but I think
around $400.
> Where is a good place to buy? Mail order? Tucker's Electronics (ads in
I find Tucker's pricing to be a little expensive. I am partial to AES (in
Milwaukee, among other place) myself, but if you shop around in the ads in
CQ or something like that you may be able to do better than AES's prices.
> _CQ_, etc) is close to my house in Dallas. Any suggestions about
> dual-band vs. just 2m or 70cm?
If it were me, I'd get the dual-bander myself. No sense locking yourself out of
all that fun stuff available on 440. I almost made that mistake, and then
decided that to ask for a dual-bander would be a lot less painful than kicking
myself later for not having one.
> Any and all suggestions are appreciated. Thanks in advance.
If you need any more info etc, please feel free to drop me email
(cravitma@cps.msu.edu)
Congratulations on passing your test.
/Matthew N9VWG
------------------------------
Date: 11 Feb 1994 15:52:28 GMT
From: mvb.saic.com!unogate!news.service.uci.edu!usc!elroy.jpl.nasa.gov!swrinde!cs.utexas.edu!math.ohio-state.edu!news.acns.nwu.edu!casbah.acns.nwu.edu!rdewan@network.ucsd.edu
Subject: Looking for LOGIKEY keyer
To: ham-equip@ucsd.edu
In article <slayCL0wC3.u0@netcom.com>, Sandy Lynch <slay@netcom.com> wrote:
>Hannes Hogni Vilhjalmsson (hhv@rhi.hi.is) wrote:
>: Can anyone tell me the present address of the Logikey Company,
>: or any other outlet for their LOGIKEY microprocessor based morse
>: keyer?
>
>If I'm not mistaken, the LogiKey is the commercial version of the CMOS
>Super Keyer II which was first described in the November 1990 issue of QST.
>That keyer is available in Kit Form (i.e. parts, pcb, but no switches,
>boxes, or batteries) from:
>
> Idiom Press
> Box 583
> Deerfield, IL 60015
>
>When I bought mine (it is a WONDERFUL keyer), I paid $45 + $3 for domestic
>USA shipping. Foreign orders were $45 + $5.
The Logikey keyer also is sold by the same company: Idiom Press. Last
I saw in an ad, the price for Logikey was $129 +s&H
BTW, Idiom Press is run by Bob Locher, W9KNI, top US operator in
the just released CW DXCC list. He is also the author of a book
on DXing and the author of the DXing chapter in ARRL Operating Guide.
He is an A1 operator.
Rajiv
aa9ch
r-dewan@nwu.edu
------------------------------
Date: Wed, 9 Feb 1994 09:47:19 GMT
From: hobbes!earth.armory.com!dev@uunet.uu.net
Subject: Opinions wanted on mobile dual-banders
To: ham-equip@ucsd.edu
i posted this a little while ago just to the equipmet group, but
seeing as i got little response, i'm widening my audience a bit. :-)
anyways, i'm looking to get a mobile dual-bander for my car. and of
course i'm interested in finding out what other people have and
why the like or dis-like it. i'm interested in what sort of
features they have, what features they do or don't need on it,
what's really good to have (expanded recieve? backlit DTMF mic?).
tell me your experiences, etc.
i've noticed that most of the units only do tx from 440 to 450
in the 70cm band. that seems a little weird to me. only the
Yaseu seems to do 430 to 450. these sorts of oddities is what
is confusing me as to what to buy.
any help on this would be really appreciated.
--
David Vangerov, KD6WXQ
dev@deeptht.armory.com
------------------------------
Date: 15 Feb 1994 01:45:34 GMT
From: scubed!ihnp4.ucsd.edu!sdd.hp.com!vixen.cso.uiuc.edu!howland.reston.ans.net!cs.utexas.edu!swrinde!sgiblab!sgigate.sgi.com!olivea!news.bu.edu!mdibella@network.ucsd.edu
Subject: sell:laptop,KAM ALL MODE,c64/1541drive
To: ham-equip@ucsd.edu
i have for sale a tandy 1500 laptop (8088 at 10?mhz) 20MB HD 640K ram,
Kantronics KAM ALL MODE w/software cables ect... and a commodore 64c and a
1541-II drive
(1500 laptop already has hostmaster and deskmate for use with kam)
tel # is 617-352-8502 or 617-646-8481 73's de n1gct (mike)
------------------------------
Date: 15 Feb 1994 01:41:22 GMT
From: scubed!ihnp4.ucsd.edu!sdd.hp.com!vixen.cso.uiuc.edu!howland.reston.ans.net!cs.utexas.edu!swrinde!sgiblab!sgigate.sgi.com!olivea!news.bu.edu!mdibella@network.ucsd.edu
Subject: sell johnson ranger?
To: ham-equip@ucsd.edu
i'm looking for a johnson ranger-- an almost any shape (working or not)
i'm willing to do a trade of some sort with a kam all mode and commodore 64
and 1541-II drive # here is 617-352-8502 or 617-646-8481
73's de n1gct (mike)
------------------------------
Date: 11 Feb 1994 15:50:21 GMT
From: mvb.saic.com!unogate!news.service.uci.edu!usc!sdd.hp.com!col.hp.com!jms@network.ucsd.edu
Subject: Vertical Antennas
To: ham-equip@ucsd.edu
Alan Bloom (alanb@sr.hp.com) wrote:
: Gary Coffman (gary@ke4zv.atl.ga.us) wrote:
: : Yes, yes, I understand that, but look at what you're saying, "the
: : current is *still* 1A in *each* 1/4-wave element." Since the dipole
: : has *two* elements, 1+1=2, it's instant flow is twice the current
: : of a single element.
: If you installed RF ammeters in each element, they would read the
: same no matter whether the ground plane is present or no. (Since
: the RF generator and both elements are in series, the current must
: be the same in each.) Each 1/4-wave element radiates 1/2 the total
: power no matter whether the ground plane is present or no.
: (Is anybody else still following this convoluted discussion?)
: AL N1AL
Yes, but you're both over my head. I still read it, though.
Mike, K0TER
------------------------------
Date: Tue, 15 Feb 1994 00:36:06 GMT
From: amd!amdint.amd.com!dvorak.amd.com!positron!brian@decwrl.dec.com
Subject: Yaesu FT-5100 packet connection
To: ham-equip@ucsd.edu
Bill Plymale writes:
> I'm trying to interface a Yaesu FT-5100 to a MFJ-1270B TNC via
> the 5100's DATA IN/OUT jack. I constructed a connector based on
> the instructions in the 5100 manual. The problem is that the
> transmit audio level out of the TNC is way too low.
It may not be the audio from the TNC -- the 5100's data connection
port has been changed recently. I own two 5100's -- one is a year old
and one is a month old. The "old" 5100 works perfectly well with the
TNC wired into the data port on the back of the radio. The "new" 5100
keys up the transmitter but doesn't provide any audio output when it
transmits.
I called Yaesu about this and it seems that they've changed the data
port on the back of the radio to allow direct 9600 baud connection.
In doing this, they made it impossible to run 1200 and 2400 baud
packet through the data port. Wiring directly to the mike connector
does still work, so that's the "correct" way to do it now. The
manuals haven't been updated to reflect the new hardware yet.
Bummer. Now I've got two "identical" radios and two distinctly
different ways to plug in a TNC.
Brian McMinn N5PSS brian@amd.com
------------------------------
End of Ham-Equip Digest V94 #33
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