[amsat-bb] confirmation of logic failure, AO-7

[Larry Kayser <kayser@xxxxxxxxxxxx>]

Greetings All:

I have just been bashing away at Ray Soifer, W2RS, in the LF world and he 
as an aside sent me the following.

>On AO-7, I see that Modes A and B are on at the same time fairly 
>frequently, and also Mode B +435.1.  I've yet to hear Codestore or the 
>45.45B beacons, though.

Well if Ray is seeing Mode A and Mode B at the same time and frequently 
where has everyone else been listening?  He also sees Mode B and 435.1.

Now we can have a pretty good idea why the passbands are grinding up 
signals folks.  If you hearing the downlinks in really bad shape take a 
look around.  If the 435.1 beacon is ON at the same time the MODE B RX in 
ON, then you have the equivalent of receive and transmit on the same band 
at the same time only a few inches apart, no wonder the transponder would 
be as deaf as a doornail!!!

So now it is even more important to get control of AO-7!

How often does this happen?

Note to the chap building the command transmitter.  Bigger amp and antenna 
needed if your going to get into the receiver when an inband transmitter is 
working on the inband receiver your trying to get into.  This was last done 
when UOSAT managed to get AO-11/UOSAT 2 talking to itself on the same band 
once.

I spoke of new knowledge about AO-7,  this is new knowledge, very important 
knowledge.  The game plan has changed now, we are dealing with a different 
level of problem.

We need to know how often this is happening and especially we need to know 
if there is any time difference of startup at the dark to light terminator 
crossing.  There is a lot of work for a lot of people to get done.

Larry
VA3LK


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