[amsat-bb] G-5400B voltages

[Phil - KB9CRY <kb9cry@xxxxxxxxxxx>]

I might be having the same problem as Gopal is having.  I find that the 
output signals from the controller to Nova (via a KCT) are jumping up 
and down periodically.  The controller seems to be indicating the 
correct position (azimuth problem only) of the antennas but the output 
from the controller to Nova has the problem.  So in the middle of a 
tracking, the antenna will start swinging back and forth and losing the 
sat.  I've tried to twist the ouptut pot back and forth to "wipe" any 
dirt out (like one would do with an AF gain control) but to no avail.  
I've also tried to reset the pot so that the max position is not at the 
end of the pot's travel, but no luck.  So my questions are:

1.  Is this merely a problem with the output pot on the controller?
I do have a spare 5400B controller that I can put inline.
2.  Is this a problem with the rotator? 
I don't think so since the controller to rotator seem real stable and 
right on.
3.  Can I replace the 5400B with a 5500B controller but still use the 
5400B rotator?
I do have a 5500B controller which I'd rather use than the spare 5400B 
controller. 

In the meantime I just have to manually track the LEOs and hope to 
resolve the problem before AO-40 is back on the air.  Tnx for all the 
help folks, this is a wonderful reflector.  Phil  KB9CRY

Gopal Madhavan wrote:

>I am having some problems with using the az-el rotor with a Labjack/Nova
>piggyback and Nova for Windows.
>
>The problem is that the on-screen indication of antenna positions varies
>considerably from the actual position and the azimuth rotor does not
>track properly with it going to full clockwise position.
>
>  
>

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