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Re: AO-40 S-Band Test



AO-40 sounded great here in EM17 Ks. using a BBQ dish 24dbi and a conifer
preamp copied telementery out to MA 9, heard signals clear out to 50.000km
before quiting. signals souned very stable.

Greg Wycoff
NØZHE EM17ej Ks.

Home web page
http://www.havilandtelco.com/homepages/GREGWYCOFF



-----Original Message-----
From: Bill Hurlock <bill@hurlock.net>
To: Jesse Morris <w4mvb@juno.com>
Cc: Amsat-bb@AMSAT.Org <Amsat-bb@AMSAT.Org>
Date: Sunday, January 14, 2001 1:48 PM
Subject: Re: [amsat-bb] AO-40 S-Band Test


>I too got on it a bit late, MA 6. The signal from the bird was down here as
>compared to other days that I have heard it. Normally it is up around S7 -
9
>on peaks but today it was down closer to the noise. I was able to copy it
out
>to about MA 30 for me before I had to leave. I was only able to decode very
>small fragments for the ASCII bulletins on the front end of the A blocks.
>System here is the B-B-Q grill ant and the Drake with all mods, no external
>preamp out to 2 meters on a 735R. Coax run is about 30 feet of 9913 with a
>flex piece accross the rotor. Using Nino's decoder.
>
>Jesse Morris wrote:
>
>> Good morning to all.
>>
>> Tried some more experiments with the S2 beacon on AO-40 today with mixed
>> results.  Pass was not nearly as good as last Sunday.  I acquired the
>> beacon late.  Elevation was about 8 degrees and the squint angel was
>> around 30 degrees as indicated by IT and kep set #23.  The signal was
>> right in the noise when I first heard it using the same setup as last
>> Sunday.  I switched to the antenna with the conventional matching (vice
>> the grounded link match in the W0OQC design) and could not hear the
>> beacon at all.  After a couple of minutes the signal got a little
>> stronger and I could hear it with the conventional antenna but the
>> grounded match antenna was better.  I can't think of any reason for that
>> except that I just haven't gotten the other antenna matched correctly.  I
>> still don't have a way to adjust the match so I am trying to use the
>> "cook book" approach.  At a squint angle of about 35 degrees I switched
>> to a  LHCP antenna but heard nothing.  Just about the time I thought the
>> signal was getting stronger (somewhere between a squint angles of 38 and
>> 40 degrees) I lost the signal.  I thought it happened as a result of
>> switching the cable between antennas but I never was able to hear the
>> signal again.  As I'm writing this I begin the think that maybe the trunk
>> of the medium sized oak tree in the front yard might have been there
>> culprit.  If so,  I gave up too quickly.  I need another shot at a little
>> better pass than we had this morning.
>>
>> As a reminder, I am using a Drake converter with only the two IF coils
>> and caps removed followed by a down converter to ten meters.  No pre amp.
>>  I would appreciate hearing from anyone who copied the beacon this
>> morning concerning the strength of the signal.
>>
>> 73 de Jess - W4MVB
>> ----
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>
>----
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