Strange conundrum. I put new power tubes in my beloved Satch a year ago...sensed that I seemed to need higher volume settings with the band. Figured I needed a rebias. Opened it up, and it was way low. I put in a new matched set to be sure, but the pots top out at about 40 ma per pair. It sounds fine, everything functions, no burned or discolored parts, amp is quiet and sweet toned as always. It's a 2016 model I bought used but mint a couple of years ago. I'm baffled...techs are hard to find around where I live. Am I crazy or missing something simple?