Output stage, the stage before the output stage, hopefully the feedback network, the bias circuitry for the output stage ..... It's a different amplifier.
Can you even buy TO3 transistors any more? (TO3, as opposed to TO3P which is a different beast). I think with the exception of MIL they have all been long obsoleted.
Can you even buy TO3 transistors any more? (TO3, as opposed to TO3P which is a different beast). I think with the exception of MIL they have all been long obsoleted.