Re: [amsat-bb] Yaesu G-5500 voltages

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

I have had similar problems with this unit and found that my problem was indeed the output pots. They had been nailed by lightning or at least a very close strike. As a result, it charred the pot(s) at one end. The output voltages are suppose to be a max of 5 volts and should be adjustable slightly above to calibrate, Since the pot(s) were charred at one end and operating open ended, adjusting the pots did little in getting the calibration to come in. Hopefully that is all that is wrong with your. The pots were rather inexpensive and being in the "lightning capital" of the world, I had bought extras to play it safe. The meter calibrated pots were fine and the unit was controller
manually without problems.


At 06:09 PM 1/1/2004 +0530, Gopal Madhavan wrote:
>Hello everyone and a Happy 2004 to all.
>
>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.
>
>I have been in touch with Mike at Nova and am doing some testing and or
>that wonder if anyone knows what the maximum voltage on the meter
>circuit via the rotor pots should be. The default max seems to be 5.000
>V but on measurement the az and el voltages seem to be much higher and
>that may be a source of problem.
>
>I have used external pots to test to eliminate problems with the pots in
>the rotors
>
>Any advice would be very much appreciated
>
>Gopal VU2GMN
>
>
>----
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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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