Dating marshall amps serial number

For Sale Ampeg SVT Head, Vintage, 60s70s; For Sale Ampeg I toured with this amp from the time i bought I've been told the serial number dates it either 69.

Ampeg B25B Guitar Bass Amp 1975 according to the Dating Ampeg Amplifiers website.

So if you find pots from late 68 and transformers from early 69 you can be pretty sure your amp is a 1969.

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.

(see chart below) YY = is a one or two digit code indicating the year.

Dating Ampeg's from this era is approximate, the amp's serial number is.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.These circuit numbers which are located on the tube chart can be usefull for getting a rough date on an amp.Fender often used the same circuit for many years so this is not a very accurate method for amp dating.

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