Here's the story. I ran across my Grandpa's old tube amp - a late 50's (?) Guild 100-J. Besides being a musician, my Grandpa was a TV repairman. I found the amp in the basement, taken apart, but working. However, a huge output transformer was wired into the circuit (aparantly the old one went bad and he wired one up that he had lying around) but the OT that is wired up is far to big for the chassis. I would like to replace the OT and restore the amp to working condition. Does anyone know what kind of OT I should get as a replacement? Any suggestions would be greatly appreciated.