Re: [amsat-bb] AO-40, K-band Tx Test Successful!

["John Wilcox" <ns1z@xxxxxxxx>]

Oh, GEEZ!! Just when we were getting comfortable with our MDS conversions,
another challenge.

Where do we look for equipment to convert? I'm ready to start!

Great Job, Team!

----- Original Message -----
From: Stacey E. Mills <w4sm@cstone.net>
To: Amsat Bulletin Board <amsat-bb@AMSAT.Org>
Sent: Monday, September 10, 2001 2:09 AM
Subject: [amsat-bb] AO-40, K-band Tx Test Successful!


>
> On Orbit 396, MA=118 to 138, the K-band (24.048 GHz) transmitter was
active
> and connected to the same inputs as the S2 transmitter.  The passband and
> beacon were first detected by Petra G4KGC (radio op) and Charlie Suckling
> G3WDG (dish op) at 1930 utc,  MA=122.  Shortly thereafter the beacon and
> passband were also detected by Michael Fletcher, OH2AUE.  The Suckling's
> used a 22 cm offset dish and reported signals 6 dB above the noise
> floor.  Michael used a 60 cm dish and reported that the beacon was 7 db
> above the noise floor under less than ideal conditions with overcast skies
> and occasional rain.  Both used linear feeds and reported good, stable
> signals except for cyclic deep fades due to the linear polarization of the
> K-Tx antenna,  the linear polarization of their feeds, and the rotation of
> AO-40.  A circularly polarized feed should eliminate these spin fades.
>
> The command team is delighted to report this additional functional
> transmitter on AO-40!!!
>
> ---W4SM for the AO-40 Command Team
>
> --
>   _______________________________________________________________________
>   Stacey E. Mills, W4SM    WWW:    http://www.cstone.net/~w4sm/ham1.html
>    Charlottesville, VA     PGP key: http://www.cstone.net/~w4sm/key
>   _______________________________________________________________________
>
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