[amsat-bb] Re: AO-07 RX - TX more questions...

George Henry ka3hsw at earthlink.net
Tue Feb 6 20:33:11 PST 2007

I used to operate RS-10/11, RS-12/13, and RS-15 with a Drake T-4XB driving a 
Drake TC-2 transmit converter, putting out about 40 watts to a homebrew 
turnstile (later, to an Eggbeater), and the matching Drake R-4B and a simple 
dipole in the attic (no preamp) for the mode A downlink.  Also had the Drake 
SC-2 receive converter for modes T and KT...  Made lots of Q's with some 
people who were very amused at my "hollow state" station!  Not sure if your 
Allied receiver is quite as stable as the R-4B was after it had warmed up 
for a half hour or so, but hey, my first SSTV and RTTY SWL'ing was with an 
old Hallicrafters S-41G (talk about drift...) and a Radio Shack Color 

George, KA3HSW

----- Original Message ----- 
From: "Tyler Harpster" <tyler881 at adelphia.net>
To: <AMSAT-BB at amsat.org>
Sent: Tuesday, February 06, 2007 9:49 PM
Subject: [amsat-bb] AO-07 RX - TX more questions...

> With my ARR 28 MHz preamp sitting here beside me and plenty of plans for
> antennas, I have a few more questions:
> 1)  Can I really pick up AO-7 with my antique Allied Communications tube
> receiver if I put the preamp at the antenna?
> 2)  How much EIRP do I need on the uplink?  Can I use my IC-706 barefoot, 
> or
> am I looking at a Mirage amp?  I think the 706 puts out 50 watts on 2
> meters.  I'd probably be using a 3 element beam for uplink with something
> like 9? db gain.  I think I saw something like a 90 watt EIRP would be
> sufficient for the uplink.
> Thanks for everyones help so far!
> 73 DE KM3G
> Tyler
> 3)  Do I really gain a few more db in gain if I suffer while I put the
> antenna up in the supercold weather here in PA, or is that just an urban
> myth?   :-)
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