I also worked AO-73 for the first time this weekend (thanks all involved for the new sat) and noticed the frequency shift also. As the bird came up I found my D/L at about 5k higher than the advertised center frequency. What was different was that by the end of the pass, the D/L ended up about 10k higher than the Doppler adjustment supplied by PCSat32. It was like, as the transponder was being used and warmed up it went higher in frequency. I found that during several QSO's I made, I had to adjust the D/L up several times. As I had just worked VO-52 this was noticeably different. I'm not complaining, I just thought this worth mentioning :-)
73 Jeff kb2m
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Rich/wa4bue Sent: Monday, December 9, 2013 6:04 AM To: [email protected] Subject: [amsat-bb] Re: Auburn sat
Hi all, Another question AO 73
I made my first contact on AO 73 this weekend with KB2M. I read on the BB that the frequency was about 10 Khz higher for the uplink and that the linear transponder wss not stable yet. I did not expect the Doppler to be shifting as much as it was on both the the QSO freqs and the Telem freqs. Maybe I had the wrong keps in! The Keps we installed were dated November 23rd.
Thank you for your help.
R W4BUE / K4AMG