[amsat-bb] RE: AO-40 on Saturday

["andrea bonaiuto" <it9gsv@xxxxxxxxxxx>]

Wayne Estes W9AE wrote :

>U-band uplink continues to be strange.  It's good for an hour, then >bad 
>for
>an hour, then good for an hour, then bad again.  Possibly a radar >signal
>affecting the AGC.  LEILA was surprisingly inactive when all of us U->band
>operators had to crank up the uplink power to be heard during the "bad
>U-band" periods.  Maybe LEILA was too busy trying to notch the radar 
> >signals
>up above 2401.400.

I agree Wane, on Saturday when we have discuss with Dom I8CVS and Shlomo 
4X1AS that was my same impression.
During the first morning (11:00 P.M local time) I'm able to heard my uplink 
very weak but befor the end of pass when sat was at maximun higth from the 
earth our signal was excellent and the squint angle was abt 9 degrees.
I can't undestant what happened to AO-40 , maybe is the AGC level or whe can 
see this effect when there are many stations.. I don't know.

So, after our QSO I have tested with Dom I8CVS my Reception system because 
usually I call on AO-40 other stations without answers.
I have strong signals from other peoples but at 60% of case nobody listen 
me...very strange!
I use a cheap downconverter by Cal Amp and I'm able to listen the trasponder 
noise level with my 80cm offset dish and 5 turn LHCP helix.
I'm sure is not like commercial downconverter whic mostly hams have but I 
can receive them and no viceversa.
In uplink I'm using only 13el RHCP with Max power 35watt on 70cm and I heard 
my downlink .

Please Ham...remember is important to improve reception and no 
transmission...I'm sure if I receive my signal you must listen the same or 
you have problem...sorry.


73 de Andrea IT9GSV@amsat.org
http://www.qsl.net/it9gsv







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