Notice the two white horizontal cylindrical InfiniCaps. The voltage measured on the right lead of each InfiniCap to ground should be about +160VDC with a maximum allowable DC imbalance of 20VDC between the two. The right channel imbalance here was about 20VDC and the left channel was 30VDC. After swapping some driver tubes around and more iterations at adjusting the trimpots, I was able to get less than 6VDC imbalance on each channel. This took a lot of time because between tube swaps, the amp had to be powered off then turned back on and left idle for several minutes for the circuit to stabilize before making more adjustments. Click photo to move to next picture.
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