[amsat-bb] Not hearing S-band on AO-51
mat_62 at netcommander.com
Thu Sep 14 17:01:25 PDT 2006
I've been trying to get a handle on my S-band receiving setup for a
couple of months now. It seems when the bird has been in V-S mode that
I've had one problem or another that hasn't allowed me to test it. I
don't have an L-band antenna up at the moment so I thought I would at
least listen to some passes the past couple of evenings to see how my
receive would work.
I have a AIDC 3731 downconverter and a small BBQ-grill dish on my Az/El
rotator system. The IF of the downconverter is at 123 Mhz. I built
another converter that was featued in the AMSAT Journal awhile back.
The purpose of this converter is to further reduce the 123 Mhz output
to 6 meters where I can feed it into my TS-2000X. Unfortunately I
haven't heard anything with this setup. I've had some near overhead
passes and once my dish gets above about 30 degrees or so it is pointing
at clear sky. I thought maybe my homebrew converter was to blame so I
dug up an HT that will receive directly on 123 Mhz. Still nothing.
I can hear the noise level increase and decrease if I cut power on and
off to the downconverter so I assume it's working. Could I be wrong in
The other thing is that it's been kind of rainy and overcast here the
past couple of evenings. Would this affect my reception?
I don't know what I should be trying here. It's pretty new to me. I know
a BBQ grill dish isn't the best antenna but it seems to me it should
work ok considering people hear the bird with this same downconverter
and a small corner reflector plus an HT.
Any ideas or suggestions out there?
TNX and 73,
AMSAT # 36017
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