V4 PCB component repair/updating

[beedoola]

for the most part I agree with Liquids on the biasing. 60% is the max I would set the bias.

generally speaking, I don't find tubes reacting to playing as a bad thing... but if only 2 of the tubes are doing it... It makes me wonder. are both sides of the power amp seeing input signal?

Two seemed to be doing it more than the others, the others were doing it as well.

I'm a little hesitant (not confident enough) to try measuring the Plate voltage as Liquids suggested. I have a Bias Probe on the way and I'll read the MA for each tube once I get it.