Fender quad reverb dating

*As a bonus, the necessary resistors & detailed instructions on how to properly set the bias of your newly blackfaced amp (using only a multimeter & calculator) are included.

Another bonus: I include two brand new Mallory M150 caps for your driver (in most SF twins one of the original caps will be too short to make the “new” blackface connection).

Model/Circuit Number: AC568, AA769, AA270 Years of Production: 1968 – 1982 Era: Silverface Configuration: Combo Controls: Silver, forward facing w/ blue labels Knobs: Black skirted w/ chrome center, numbered 1 – 10 Faceplate Bias: Fixed, adjustment pot or balance pot Rectifier: Solid State Comments: A master volume was added in 1972.

Other late seventies circuit changes included a Line Out jack, hum balance pot, and a pull boost sw.

This ensures maximum efficiency, optimum performance and the best possible tone from your Fender! Because matched sets sound SO MUCH better than unmatched!

Instructions for reading color codes on resistors included.

Fender switched back to the blackface era cosmetics some time in 1980.

Twin Reverbs produced between late 19 have a black control panel and silver sparkle grille cloth.

After the preceding looks of the early 50's (TV front from 1950 to 51/2; wide panel '52–54), Leo Fender changed the cabinet design again, this time opting for no extra wood on the front of the amp, except for the narrow top and bottom panels that hold the baffle board to the cabinet.

The early models of the larger "narrow-panel" tweeds are also remarkable for their refined electronics whose circuit design incorporated dual 5U4 rectifiers in the Twin and Bassman models, another improvement given Fender's quest for a louder, cleaner amplifier.

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