[amsat-bb] Help with AO-73

[Alan]

Bob,

I have been playing around at the edges of the transponder on weekend daytime passes.  I have found that the short term satellite LO stability is good so long as it has not just entered/exited eclipse.  You may need to make a relatively large correction in the uplink frequency, but once you get it matched, it is good for the entire pass with only minor tweaking.  Unfortunately, combining FDT with manual tuning for an UV bird is probably the worst possible combination!  So when in Rome, be a Roman candle!  

Now, if I could just remember to click on the right part of the screen.

73s,

Alan
WA4SCA


<-----Original Message-----
<From: amsat-bb-bounces at amsat.org [mailto:amsat-bb-bounces at amsat.org] On Behalf Of Bob- W7LRD
<Sent: Monday, September 08, 2014 11:13 AM
<To: Andrew Glasbrenner
<Cc: amsat-bb at amsat.org; Fraser Bonnett
<Subject: Re: [amsat-bb] Help with AO-73
<
<I disable the computer control for frequency control and do it the old fashion way.� I does take a bit of "work" almost
<constantly tweeking knobs, but it does work, and after a few efforts it is really quite easy and simple.�
<73 Bob W7LRD
<
<----- Original Message -----
<
<From: "Andrew Glasbrenner" <glasbrenner at mindspring.com>
<To: "Fraser Bonnett" <FraserBonnett at verizon.net>, amsat-bb at amsat.org
<Sent: Monday, September 8, 2014 7:20:51 AM
<Subject: Re: [amsat-bb] Help with AO-73
<
<
<>
<>
<>If I don't use SAT mode, I'd be constantly switching between VFO's, pressing
<>buttons and re-tuning constantly?
<>
<>
<>
<>So I guess, I need to find someone who is successfully working AO-73 with an
<>IC-9100?
<>suggestions would be appreciated.
<>
<
<Forget SatPC32 for this one. When you switch to AO-73, let it initially set the frequency, then click the C button and shut
<SatPC32 tracking off.
<
<Find a clear freq or a station you want to call. One of the buttons ( I think main or sub, it's a bit different on my 910 or 821)
<will let you tune the uplink while leaving the downlink static. Do that, tune while transmitting until you hear yourself. Have
<QSO or call CQ, and every transmission tune the uplink the first 0.5 second to keep on your receive. If the station you are
<working moves on the downlink, lock the vfos back together, tune him in, then go back to just tuning the uplink.
<
<It sounds worse than it is, but this is the procedure for when you don't have computer control (or it doesn't work, like with
<AO-73). Give it a try, it's not hard.
<
<73, Drew KO4MA
<
<PS This works for all the mode B birds. On Mode J, tune the downlink (the higher frequency).
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<_______________________________________________
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