Dating fender twin amps
Fender often used the same circuit for many years so this is not a very accurate method for amp dating.The code is simple, the first two letters are the revision, where AA is the first revision, AB is the second, etc.Here is a cool link to a Vintage Fender Amp price history chart that tracks sales data for specific amp models by the month.Date Code: Wide panel, narrow panel, brown, blonde, and black face amps have a date code hand-stamped on the tube chart. The first letter translates to the year and the second to the month. Example: FG=July 1956, QA=January 1967, and a reissue CG=July 1992 EIA Source-Date Codes: Electronic components such as transformers, potentiometers, speakers, and some capacitors are often stampted with a date code indicating who manufactured them and when.The code follows the format: XXXYY ZZ where: XXX = a two or three (possibly four on newer amps) digit number indicating the manufacturer.
The fist Master volume controls were first installed in 72.Next, (if applicable) look for the date code on the tube chart.If your amp dosen’t have a date code, flip the amp upside-down and check the transformers, and speakers for their manufacturer codes.If possible, open up the chassis and check a few of the pots’ and capacitors’ manufacturer codes.Remember, many components could have been changed over the years, speakers blow, caps dry out, transformers melt down, and pots wear out.
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In the silverface era Eminence, Oxford, Utah and Rola were more often used and Jensen was phased out.