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Re: Re: Re: AO-7 CODESTORE test opportunity



Hi Steve, N3TE

Unfortunately Larry Kayser,VA3LK the maximum expert for AO-7 
was SK october 5, 2004 but I have a file in wich I collected all messages 
that Larry published about AO-7 in this reflector AMSAT-BB

If Larry Kayser letters after AO-7 resurrections are of public interest I 
can resend it regularly via AMSAT-BB

I will do the job depending on the number of requests.

73" de

i8CVS Domenico
 
----- Original Message ----- 
From: "Steve Fick" <n3te@amsat.org>
To: <amsat-bb@amsat.org>
Sent: Tuesday, January 24, 2006 2:59 AM
Subject: [amsat-bb] Re: Re: AO-7 CODESTORE test opportunity


> Hi Mike,
> 
> Thanks for the reply. From the various posts I've found on the subject
> of controlling AO-7, it wasn't clear that anyone now has the wherewithal
> to transmit commands.
> 
> I agree completely that no test invoking even the slightest doubt should
> be attempted when the next "system reset" is many weeks away.
> 
> I have no way to know whether the command set allows the CODESTORE
> memory to be refreshed (or the 24 hour timer to be reset) without
> running the risk of disrupting other operations.
> 
> If my guess is correct that the intermittent carrier I hear is the
> CODESTORE circuit (instead of the TLM circuit) controlling the CW
> beacon, the CODESTORE circuit is already on - I haven't heard any
> telemetry since the bird came out of eclipse.
> 
> The timing of my posting the question was inspired by the one advantage 
> of refreshing the memory with the bird under continuous power - the
> uploaded message would persist for more than one orbit.
> 
> Now for a safer question. Since the "resurrection" of AO-7, has anyone 
> looked at the schematics of the 24 hour timer, the BCR, and the 
> transponder control circuitry in an attempt to explore the causes of the 
> seasonal mode preferences? As a practicing EE, I volunteer to join any 
> team that may be pursuing this question.
> 
> 73,
> 
> Steve N3TE
> ----
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