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K200 B-1 LF oscillation [message #26414] Wed, 29 November 2017 15:49 Go to previous message
HRCAS is currently offline  HRCAS
Messages: 1
Registered: November 2017
Junior Member
Hello to all.
An K200 B-1 I've been rebuilding has begun producing a loud LF pulse with an instrument plugged in when I get beyond 50% of throttle. This occurs only on Ch 2. Shorting the 500pf cap (I replaced it when the problem began) between the input jacks is a help. but not a solution. Any thoughts or suggestions would be welcome. BTW all transistors are modern parts.
Thanks,
HR

[Updated on: Wed, 29 November 2017 15:53]

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