08-24-2013, 01:45 PM
I'm confused with this one. As Morzh said, a standard phono motor (since the late 30's, anyway) is an AC synchronous motor. I've run these anywhere from 60 to 130 volts without affecting the speed (the torque, yes, but not the speed). I've owned phonographs that used the standard 115 volt motor as a voltage drop for the tube in the amplifier (50C5), and the motor ran fine.