[amsat-bb] Receiving FO-29 verses AO-7

Todd superiortrading at gci.net
Sat Dec 20 16:43:57 UTC 2014

I am new to the Sat world and hope somebody can steer me in the right 
direction with a issue I have working FO-29. It seems I have no problem 
most times working AO-7's transponder and the SO-50 fm bird but can't 
seem to receive well with FO-29. I can hear the beacon (weak) but can't 
seem to hear my signal come back down. I am using a CW signal and using 
a Icom 706 and 746 rigs. SatPC32 is controlling both radios. Antenna is 
a cross polarized modified Cushcraft A6270-13S with the six meter 
elements left off and the UHF elements rotated 90 degrees. I have a 
Comet diplexer on the boom. I had problems with desense before rotating 
the elements. I have gone through everything I can think of using 
SatPC32 in calibrating but still can't tune the downlink CW signal. 
Yesterday FO-29 came by and I could hear my cw signal but seemed like I 
couldn't tune it in correctly (pitch). I don't have that problem at all 
with AO-7 and can tune the correct cw pitch and voice audio with no 
problem. I am wondering if the maybe the two radios are interfering with 
each other on those frequencies or at 435 the antenna still has some 
desense happening? The only difference is VU for AO-7 and UV for FO-29 
and 432MHz verses 435 for FO-29.

More information about the AMSAT-BB mailing list