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In Reply to: RE: That is correct. posted by Michael Samra on April 18, 2016 at 15:03:43
It seems like there is no real damage done to the amp. It looks like the 845 have worn out and need to be replaced. the tube lineup is 12at7 - 2a3 - 845. If the owner subbed a 12ax7 for the at7 would that drive the amp harder? If the ax7 has more gain would not the signal to the 2a3 be more and thus working the 845 even harder? cheers, Dak
Follow Ups:
"If the ax7 has more gain would not the signal to the 2a3 be more and thus working the 845 even harder? "
Only if he turns it up. (or, to say it the other way around, only if he didn't turn the volume control down to compensate for the added gain of the 12ax7 vs. the 12at7)
Or to say it yet another way, if he listens at the same level as he always did the 845 would not be "worked" any harder.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
Hi Tre, the upshot of the whole problem is that i found the bias pot on one amp was burnt out. So, i replaced both pots with beefier AB units and now the amp plays and sounds good. The bias voltage is controllable and works as it should.
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