Original poster: "Dr. Resonance" <resonance-at-jvlnet-dot-com> It was asynchro, ie, not a synchro motor. Dr. Resonance > > I got to thinking ( uhoh) and the original question was about 300BPS being > a SRSG... how can a SRSG be synchronized at other than 100 or 120 Hz if > running on wall current? ????