Yep, it drifts. Best to tune that one by hand in my opinion. G0MRF addressed it in an email to the -bb a while ago if I recall correctly.
73, Drew KO4MA
Sent from my iPhone
On Jan 10, 2014, at 4:26 PM, "Peter Wilson" protest@virginmedia.com wrote:
Hi all,
I'm having great fun on all the operational satellites, including AO-73.
However, I find that even using CAT control I have to adjust the uplink frequency almost constantly throughout the pass.
I have to shift buy about 3500Hz overall from start to finish, increasing all the time.
Is everyone else seeing the same effect?
Peter
G8KEK
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