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Old 11-27-2021, 05:39 AM   #2
stj
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Default Re: Frying amplifier finals... audio, not rf...

i often help a guy fixing amps - dont get them myself.

the most common cause of final destruction is faulty bits in the pre-drive either overdriving the finals or turning both parts of a push/pull pair on together or overlapped!

it can be anything - last one was just an out-of-value resistor shifting the bias enough to make one transistor drive against the other!!!
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