On 2015-11-19 6:20 AM, Brian Walenz wrote: The capacitor is likely on a separate winding and the tank circuit created by this winding and the capacitor works to regulate the output voltage also referred to as a "Constant Voltage Transformer". If this capacitor goes short you get zero output from the transformer a lesson I learned early in my career as a service rep. When the capacitors are going bad they will sometimes swell up and even burst. Early capacitors of this type where filled with an oil that contained PCBs but by the mid 70s some manufacturers had replaced them with capacitors that did not contain PCBs on all in service machines. Paul.