
The first silverface Twins used the blackface AB763 circuit until May 1968, when Fender switched to the AC568. Since the tube complement was the same, Fender just used up their stock of printed tube charts saying AB763 until they ran out. Thus many silverface amps are mislabeled and this has created some confusion, causing some owners to think they have AB763 circuits when in fact they are AC568s.
The Twin Reverb, along with all other silverface models, had an aluminum frame (trim) surrounding the sparkling blue grillcloth from late 1967 to 1969. Early silverface amplifiers made between 1967 and 1968 had black lines on the brushed aluminum control plate, still retaining the '60s "tailed" design. This feature was offered on models produced prior to the "tailless" period in 1973.
The rating of the amplifier's output power was also upgraded to 100 watts.
From about 1973 forward, a master volume with pull-boost (on a push-pull control) became a standard feature on all dual-channel silverfaced Fender models (usually known as "master volume" amps). Original master volume amps from late 1972 were made for a short time without that "pull boost" circuit on the master volume control.

We currently have 2 of these amps for hire at Tym guitars. We have one early 70's 100W and one later 70's 135W. Check out our HIRE list or cantact the shop for more details.
No comments:
Post a Comment