bruno2000
Well-known member
After seeing all the great responses to another Output Oscillating, I have this problem and am stumped. This is the output stage of the PYE 4060 compressor, except for C*1. That cap is not in the original schematic. The transformer was wound by one of the most respected transformer wizards on the Forum. Without this cap, the circuit oscillates. Looks like noise on the scope. I've tried all kinds of "grounding", but nothing helps much except for the cap. it's 100nF which seems huge. Lower values don't touch it. Put the same cap across TR6, and it oscillates again. The circuit draws about 160mA which also seems excessive. Suggestions?
Thanks!
Best Bruno2000
Thanks!
Best Bruno2000