Tube Amp Archive

Not a Bassman50, sorry, should have said Bassman 50watt head. Sticker code either a QD or OD so '66 was wrong, circuit listed as AB165. Dude I got it from said it was '66 (that was in 1984, cost $50. He was a navy electronics tech and had put in a 3 prong cord, replaced all but one filter cap, also ...

AB165, 220k 'terminal strip' resistors removed. Just recapped it (filter, bias and bypass caps only) and began testing it. Cap job restored the volume I had noticed reduced (had not played it in many years). Problem 1.: When volume and treble controls are maxed, sound is cut off. Certain manipulatio...