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You said the amp is working. If there is no bias current, I would expect audible crossover distortion on clean settings.
What is the DC voltage on the power tube grids?
Edit: re-reading, you are getting more than 600mV (OL for fluke 117) when checking the bias test point on mV range?
What is the DC voltage on the power tube grids?
Edit: re-reading, you are getting more than 600mV (OL for fluke 117) when checking the bias test point on mV range?
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