Dating fender bandmaster amps


22-Nov-2019 14:53

Model/Circuit Number: AB763, AB568, AB569, AA1069, AA270, AA1070 Years of Production: 1968 – 1981 Era: Silverface Configuration: Combo Controls: Silver, forward facing w/ blue labels Knobs: Black skirted with chrome center, numbered 1 – 10 Faceplate Bias: Fixed, adjustment pot (AB763) or balance pot (all others) Rectifier: 5U4GB , Some later production models seem to have come without the 5U4 rectifier and had solid state rectification instead.

Comments: Fender added int he Master Volume control with pull-knob Boost in 1975.

It’s unknown if the tweed covering was a mistake (“Oops, I thought this was a 4x10 Bassman cabinet that I was covering”) or intentional, perhaps as a special order.

Non-Schumacher transformers – It’s been universally accepted that Fender only used Schumacher transformers on amps made in the 1960s and 1970s.

The fist Master volume controls were first installed in 72.

The raised “Fender” grille logo lost its tail around 76.

I promise the tables will still be there after you finish reading.

Okay, I know you’re all just dying to skip ahead to the serial number tables but try to contain your excitement and read through the article first.

Serial Number: There is no information readily available for dating Fender amps by serial number but there are people working on it. Circuit Code: In 1963 Fender stoped using model numbers to identify schematics and began using the model name and an assigned circuit number.

These are marked with EIA code “831” and are most prevalent during the 1966-68 time period.