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@gmail.com To: amsat-bb amsat-bb@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 evening. 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 _______________________________________________ Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb