Home › Forums › Design and Building › 2 Stroke Amplifier Design and Building › Squeal and hum on 2stroke › Re: Re: Squeal and hum on 2stroke

January 25, 2013 at 1:35 am #5769
beelzebum
Participant

If your primary leads are swapped, then it will be sending positive feedback instead of negative through your circuit. It looks like this could be your problem. As for the NFB resistor, most people forget that the OT is DC ground on the secondary. so that resistor has to be out of circuit to test.