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I know this thread is old but I have a problem with the same amp. When it gets warmed up, generally toward the end of tuning the relays begin to chatter and sometimes stay stuck chattering even after the mic is unkeyed. I have checked every component on the relay board with no luck. All the filter caps were replaced along with the voltage doubler diodes. Could it be bad relays? Even the hv relay does it from time to time. Oscillation perhaps? I'm by far no radio technician but I know a few basics. Any help would be appreciated, tia

[QUOTE="bradstar773, post: 762661, member: 44023"] I know this thread is old but I have a problem with the same amp. When it gets warmed up, generally toward the end of tuning the relays begin to chatter and sometimes stay stuck chattering even after the mic is unkeyed. I have checked every component on the relay board with no luck. All the filter caps were replaced along with the voltage doubler diodes. Could it be bad relays? Even the hv relay does it from time to time. Oscillation perhaps? I'm by far no radio technician but I know a few basics. Any help would be appreciated, tia [/QUOTE]

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