[amsat-bb] AO-92 L Band

Greg D ko6th.greg at gmail.com
Mon Feb 5 05:17:20 UTC 2018

Yes, definitely need to shoot a little high on the L-band uplink.  I was
running it about 10khz high, but it seemed to have some tolerance for
being off by a few.  Made contact on the 04:47z pass with Patrick
WD9EWK, and also heard AD5MT, but couldn't complete the contact.  Manual
tuning of the FT-736R uplink, watching Gpredict's display, with computer
control of the FT847 downlink and antenna rotisserie.  That's the first
contact on L-band since, um, AO-51?  Nice to know it still all works! 
Now I need to figure out how to get Gpredict to run both radios...

Stations heard have a "distant" sound to them - kind of hard to
describe, and not something I've heard on other satellites.  I think the
lower part of the audio frequency response may not be as strong as the
upper part.  Also, the audio was kind of quiet overall (comparing to the
unsquelched hash).  {shrug}  Certainly not a big problem, however you do
have to listen carefully.  Headphones required.

Greg  KO6TH

Mike Seguin wrote:
> I just had a very noisy 6 degree max pass here in VT. There was nobody
> in the footprint on L Band so I tested nominal frequency for the uplink.
> This time the nominal was ~ 8.5 kHz high. 1267.3585
> More testing is needed, especially with lower power to fine tune.
> Mike

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