I'm fixing up an older Channel Master light-duty rotor to turn a small 2m
wooden quad I've built for my attic, but one of the plastic gears in the
control unit disintegrated in my hand during the rennovation. The rest of
the control unit is in rough shape too.

I'm thinking of building my own power supply/control unit for this rotor,
but I'm not clear on just how these 3-wire units actually control the rotor.
Any ideas? I can perhaps make my own simple PS, and figure out the
direction-setting power scheme, but getting feedback on the antenna position
to prevent over-turn cound be tricky.

Thanks to all who reply...

VE9XYZ Kevin