Original poster: "resonance" <resonance@xxxxxxxxxxxx> Tony: That was 4-12 uF not picoFarads.This for a small 1/20th to 1/10th HP motor. For a larger RTTY type synchro motor the value is usually around 10-12 uF and sometimes higher. Values higher than this typically feature a disconnect centrifugal switch inside the motor housing at the real tailshaft. If you operate the motor with more than this amount of capacitance the high currents could damage the windings or burn the motor up. Good idea to monitor the currents while you are testing to be sure it is within the range stamped on the motor's plate.
Dr. Resonance
Original poster: "Anthony R. Mollner" <penny831@xxxxxxxxxxxxx> I see now. Thanks Gerry, I hope to do some tests tomorrow. I dug out an old momentary push button that's perfect for this now all I need to do is to get a Cap. that will work. I have a few but I think they are to high a value. Dr. Res. suggested 4 pf but what I have is in the 7-8 value. I might try them anyways and see what happens. Tony