[amsat-bb] AO-92 L Band
n1jez at burlingtontelecom.net
Mon Feb 5 18:14:31 UTC 2018
Hi Jean Marc,
Tnx for the info. Yes, this is very helpful. Lowering uplink power helps
tremendously in finding the ideal frequency.
Reports so far all seem to be in substantial agreement.
On 2/5/2018 1:03 PM, Jean Marc Momple wrote:
> 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.
"A closed mouth gathers no feet"
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