Re: Cyrus III amplifier - output stage failure.
Everything pre driver stage appears OK. But before powering up fully, it will get a lamp limiter and a variac and mid-point monitoring during power on. I've often wondered about changing the emitter resistors in output stages from the .22 fitted to say 22ohm. This would obviously limit the current during testing, and if there was a fault in the voltage amp stage, I think the amp would still work, but produce very little power, but show up any voltage offset etc.
Waiting for the drivers at the moment, will post again when they're fitted.
SJM.
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