[amsat-bb] AO-92 L Band

Jean Marc Momple jean.marc.momple at gmail.com
Mon Feb 5 18:03:39 UTC 2018


I confirm that the uplink frequency  on L-mode is about 9kHz high. I made a QSO with ZS2BK, my good friend Andre yesterday and also check same on the previous pass of AO-92, being in the middle of the Indian Ocean and having the SAT for myself to test during the whole passage it was easy to confirm same.

On the other hand I believe that the SAT is very sensitive on L-mode, to explain I was made to understand that one needs about 100W EIRP to have reliable com on this bird on this mode, I was able to trigger it with about 70W EIRP as from horizon (ele. 0 deg.), and ZS2BK in spite some fading was crystal clear sometimes with about only 24W EIRP. We need a few more passes to determine the exact requirement and will do so this side.

Not to mentioning the U/V mode which is superb, 3 local HAM’s in 3B8 were able to make a QSO with Baofeng’s last Wednesday...

I hope my feedback is constructive.


Jean Marc (3B8DU)

> On Feb 5, 2018, at 4:21 AM, Mike Seguin <n1jez at burlingtontelecom.net> 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
> -- 
> 73,
> Mike, N1JEZ
> "A closed mouth gathers no feet"
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