I drilled my chassis and installed a second bias pot. I wired one pot in to each output tube. I pulled out the 1/4 mono jack for the bias and installed a stereo jack in which two meters are wired.
So you now have one control for each output tube and one meter for each tube. You can now adjust your little hart away and use your unmatched tubes.
So you now have one control for each output tube and one meter for each tube. You can now adjust your little hart away and use your unmatched tubes.
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