On 10/03/2020 13:59, John Brier via AMSAT-BB wrote:
Hi fellow satops,
I have a Yaesu G-5500 I got used a couple years ago. In February I hooked it up for the first time on the ground with an LVB Tracker and MacDoppler.
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Sounds like the position pots in the rotor (not the controller) are dirty. That does make some sense with it not being used for several years. Step one (the easy way) is to use the manual control levers on the controller and repeatedly move the rotors from end to end while watching the needles. If you are a bit lucky, after a few passes back and forth, the needles will start responding correctly. Keep trying at least a dozen full passes back and forth before giving up on this method. The next method requires disassembly of the rotor - now you know why I suggest giving the first method lots of tries before giving up on it. If you have to resort to the second method, I will let someone who has done that more recently than I (about 20 years) give instructions.