Re: [amsat-bb] G-5400B voltages

["Reid Bristor, Sr. Consultant" <rbristor@xxxxxxxxxxxxxxxxx>]

As I had mentioned to the previous individual, your may be the same problem. I am also using the KCT here and it is also possible that the A to D chip on the KCT could be bad. However, I found that it can handle a lot more abuse then the controller.



At 07:14 AM 1/1/2004 -0600, Phil - KB9CRY wrote:
>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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Reid Bristor
Bristor Associates
URL:    www.bristor-assoc.com
Phone:  (321) 213-1708
FAX:    (321) 253-1162

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