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In Reply to: RE: Something is screwy here posted by Blackdog on July 25, 2015 at 04:53:52
At idle, they both read far too low and can't be biased higher. I wonder what's going on?
Follow Ups:
What amp? There a number of reasons for low bias current.
Dan Santoni
Two custom made DIY PP amps, one by Jeff Larson and the other by Peter McAlister.Both sound very good.
I don't know the Jeff Larson, but the McAlister's lack of bias could be anything from changes he made, variations in tubes or his poor build quality.
Typically when you can't get bias current high enough it's too low a plate voltage, variation in output tubes or bias voltage too high overall.
Dan Santoni
I had the amp rebuilt by a tech. It sounds lovely.
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