In Reply to: Please help finding this darn hum posted by airtime on December 30, 2021 at 15:33:14:
Some testing steps to try:
Lift one leg of C1 to localise fault options.
Put a shorting link across R3.
Put a 100uF across R9.
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Follow Ups
- RE: Please help finding this darn hum - trobbins 17:04:54 12/30/21 (1)
- RE: Please help finding this darn hum - airtime 18:43:19 12/30/21 (0)