Voltages all good, heater supply cap also replaced. I need to dig in with a scope and isolate a few things, was hoping someone else had a similar issue I could shortcut from. The thing still sounds great but does not have a black background at high volume, most music swamps the sound. Will dig up the schematic again (somewhere in the shop) and plan a next move. Might even get another kit to use while fixing this one, I hate being without good sound...