Thinking about bringing the KSA5 clone, balanced Dynalo, and the single ended version of the current feedback amp...still trying to work schedule. I've got a date with the summit of Mount Washington right after I need to pack for.
Wow, it's almost invisible to the eye, but checks easy with the DMM. I thought someone had swapped my obecalp prescription....now I know what was going on.
Use a battery and DC as input, it's a DC amp. Measure the output voltage with a meter....you'll see whatever imbalance you have, including effects of the pot.