-CB- said:jackthehack said:They frown on you disassembling things at GuitarCenter; tried out one of the '65 Twin Reverb reissues a while back, definitely does not have tubes soldered in, but couldn't see circuit board. Think it is supposed to be the AA769 schematic. It's been a long time since I played through a real '60s Blackface Twin, but the reissue didn't seem to have as much power or "crunch", but could be my recollection, I guess....
Its AB763, by 69 they had the dual bias thing, mostly grid bias, with medium value grid resistors to "even things out" between unmatched tubes.(it sucked bad). They went from bias level, to bias balance, to "self balance" and back to bias balance.
Its the speakers Jack. Old twins had JBL or higher end Oxford speakers. Todays Twin... sadly... has crap. Putting a set of Vintage 30's in a Twin is good. Putting old JBL D120's is better.
Wish I'd known that a couple of weeks ago; it's that time of the year and somebody was giving one away on the local Craigslist...