[amsat-bb] Re: [ao51-modes]

Clare Fowler lcfowler at magma.ca
Fri Dec 8 06:43:01 PST 2006

On the 02:00 UTC first pass after the switchover one I found
AO-51 was in L(ssb)/S and was able to tune myself in however
did not have time to really check it out.
This am on 14:00 UTC pass had good overhead pass and
worked well. My FT-736R with 10 W out read an uplink
freq of 12687015 for reasonable audio.  However there is
some change in freq of +/- about 100 Hz required to keep it right on.
The audio level is low.

I heard someone else trying but could not copy anything.

My uplink is 4 x 27 turn helix array with a circumference of
1 wavelength and pitch angle of 12.5 degrees which
according to published NEC modeling should not work
nearly as well as they do. See my article in May/June 2006
AMSAT Journal.
> ----- Original Message ----- 
> From: "OZ1MY"
> Subject: [amsat-bb] Re: [ao51-modes] AO-51 schedule mode-L(SSB)/S
> Hi all,
> Just tried it and it works - but used a lot of power
> on the L band uplink.
> Power at antennas approximately 15 W PEP
> Antennas are 2 19 turn helix types
> Downlink the usual BBQ Grill dish 60 by 90 cm linear polarisation
> Had to change the frequency in the SatPC32 doppler file
> 1321 Hz up. I am using USB on the uplink.
> Now it is:
> AO-51,2401198,1268701.321,FM,USB,Nor,2256000,0,Voice L/S
> Heard one or two other stations trying to get on frequency.
> 73 OZ1MY
> Ib
> -- Original Message ----- 
>> From: "Andrew Glasbrenner"
>> Sent: Friday, December 08, 2006 4:02 AM
>> Subject: [ao51-modes] AO-51 schedule
>>There is a minor change in the schedule as published. Instead of 
>> switching
>> to L SSB/U tonight, we ended up in L SSB/S. This will run through 
>> tomorrow
>> evening, when we will change to the announced L SSB/U mode until 
>> 11DEC2006
>> at ~200Z when we go back to the normal V/U repeater and BBS mode. Sorry
>> the confusion, consider it a one day bonus mode!
>> 73, Drew KO4MA
>> AMSAT-NA VP Operations

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