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Re: AO-07 - 27 June 2002



I heard this once too, but it use on mode B.  It was a deep fade on my 
signal for about 30 seconds,  but the beacon was still going strong.  Then 
I worked Randy toward the end of the pass. I can remember if I've seen 
photos of AO-7 showing the antenna arrangement around the bird.


At 11:05 AM 6/27/02 -0400, you wrote:
>de W4MVB
>
>AO-07 was in Mode A during the latest pass - 1337 - 1359 UTC.  I acquired
>the 29.502 beacon shortly after horizon break and it got stronger as the
>elevation increased.  Frequency was stable.  After a few minutes of
>listening to the wrong passband I found Jerry, W0SAT calling CQ with good
>signal strength and stable frequency.  We managed a brief QSO but at
>about CPA the signal started FM'ing and loosing signal strength.  After a
>short period the passband signal and the beacon were gone.  It sounded
>like a gradual fade and not a mode switch.  I did not hear any other
>beacon.  I did not hear anyone else in the passband but I did not listen
>to the entire passband.  I had not heard the bird act like this before.
>It sounded like a power "brown out" but I think it should have been in
>sunlight for the entire pass.  The spacecraft might have rotated or
>perhaps there is a battery function at work in some way.
>
>73 de Jess - W4MVB
>
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