Fender potentiometer dating
The first letter is the year and the second letter is the month. If the tube chart is not in the amp or has been torn or damaged and you cannot read the ink stamped letters you can date the amp by the codes on the potentiometers.
While dating Fender amps made before 1994 by serial number is all but impossible (as records of these numbers were never kept), all hope is not lost—the charts below should prove helpful in dating your Fender amp.This sticker is a chart that shows the types of tube types used and the order of their physical location in the amplifier, and may be rubber-stamped with two-letter date codes that denote the year (first letter) and month (second letter) of production.These stamped letters may appear in various positions on the chart.Although the dates derived using the charts below will likely be a good approximation, they should not be considered exact.All Fender amplifiers manufactured from 1990 to the present include a date code, printed on the quality assurance (QA) sticker on the back of the amp chassis.Electronic components such as transformers, potentiometers, speakers, and some capacitors are often stamped with a date code, which indicates the manufacturer and the manufacturing date.
The code follows the format: = a number from 1 - 52 indicating the week of manufacture.
The following chart, was originally printed in VG magazine, by Gerald Weber.
If you see any data that is not listed here or notice any errors, for 1970’s and earlier Fender amps, please send us an email and we will update the chart.
On the inside of your vintage Fender amplifier there is a paper chart with the tube locations for that particular model. On the tube chart there will be a rubber ink stamp with two letters.
In the chart below you will see the letters that coincide with the year and month of the amps manufacture.
If you are unable to determine the approximate production year of your amplifier using the above charts, there are other means of dating Fender amps.