[amsat-bb] AO-73 RECEIVER DRIFT

David G0MRF g0mrf at aol.com
Thu Jan 21 08:24:38 UTC 2016

Hi Jeff
Thanks for that report.
I am aware that the command stations use one of the internal temperature sensors to get the uplink 'in the right place' but I didn't know it was so repeatable.
The internal temp appears to reach a minimum about 10 minutes after it exits eclipse, so presumably the drift slows at that point then heads in the opposite direction.

Still a bit of a luddite here and just tune until I hear my downlink !

Best wishes

David  G0MRF
-----Original Message-----
From: jeffory broughton <jefforybroughton at gmail.com>
To: amsat-bb <amsat-bb at amsat.org>
Sent: Thu, 21 Jan 2016 1:49
Subject: [amsat-bb] AO-73 RECEIVER DRIFT

The AO-73 satellite is one of my favorite .It has a phenomenal transmitter
and receiver.I checked the amount of drift a year ago and again this
It is exactly the same, 200 hz per 30 Seconds or 400 per min.I had been
correcting during a qso with the cat box open ,clicking away with my
mouse.I just discovered that the plus and minus buttons in my keyboard are
actually a XIT control ! I watch the clock in the upper right corner of
satpc32 and tap away.
I am able to stay right on during the entire pass. Hope this helps others.
I know some folks avoid this bird because until you figure this out it can
be tough to work.WB8RJY JEFF

jeff broughton
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