Dating vintage potentiometers

dating vintage potentiometers

How can I tell how old my potentiometers are?

When dating an instrument by the ‘pot code,’ keep two things in mind: The potentiometers must be original to the piece (new solder, or a date code that is off by ten or more years is a good giveaway to spot replacement pots); and the pot code only indicates when the potentiometer was manufactured!

How to read a potentiometer date code?

One problem with potentiometer date codes is that they are often covered up with solder! Sometimes you have to piece together the code from multiple potentiometers. The bottom right pot has the numbers 1376xxx visible. The pot above that one seems to indicate 13767xx indicating 1967.

Who made potentiometers in the 60s and 70s?

Most 60s-70s Gibson potentiometers were made by CTS (Chicago Telephone Company), although other manufacturers did also supply pots to Gibson. Pots usually have several identification numbers. One is the manufacturers id code with date, and another is the Gibson part number.

How to date cba-811-1053 potentiometer?

The CBA-811-1053 isnt helpful for our dating purposes. Next is 500k which is the max resistance of the potentiometer, also not useful for dating. The code we are looking for starts with 137. 137 is the manufacturer code, in this case indicating CTS or Chicago Telephone Supply. The next part of the code will have three or four digits.

How can I tell how old a guitar is by its potentiometer?

With the potentiometer decoder you can decipher when and by which manufacturer it was made. The potentiometers (pots) on the guitar offer a possibility to date the age by their source code. Assuming that the pots are original and therefore have not been replaced. The source code on pots indicates the manufacturer and date when they are made.

What is the year and month code on an Egen potentiometer?

Egen potentiometers have a simple two letter date code in the format MY (although occasionally they used YM). The month code ran A-I (Jan-Dec). The year code may not encompass the entire alphabet (then again it may), but the most relevant section covering British guitar construction (early-mid 1960s) ran H-O (1960-1967).

What does the code on a potentiometer mean?

On the potentiometer is a code that gives information about the manufacturer and the year and week when it is made. Stamped or punched you can see a six- or seven-digit source code on the back or side of the potentiometer. Sometimes there is a space or dash between the manufacturer code and the year/week code.

How do you check the rating of a potentiometer?

Steps Find out what the rating of the potentiometer is. Get an ohmmeter which you will set to a setting that is higher that your potentiometers total resistance. Take a closer look at the potentiometer. Take the probes of your ohmmeter. Turn the controller all the way to the other side.

What does cba-811-1053 mean on a potentiometer?

The CBA-811-1053 isnt helpful for our dating purposes. Next is 500k which is the max resistance of the potentiometer, also not useful for dating. The code we are looking for starts with 137. 137 is the manufacturer code, in this case indicating CTS or Chicago Telephone Supply.

How do I find a potentiometer for a Gibson Guitar?

You can look up Gibson potentiometers by their part number in the Gibson pot index on this site. There are very many electronic companies worldwide producing potentiometers, but most American vintage guitars of the 20th Century used pots by just a few manufacturers.

How to read a potentiometer date code?

One problem with potentiometer date codes is that they are often covered up with solder! Sometimes you have to piece together the code from multiple potentiometers. The bottom right pot has the numbers 1376xxx visible. The pot above that one seems to indicate 13767xx indicating 1967.

What is the EIA code for potentiometer?

There are very many electronic companies worldwide producing potentiometers, but most American vintage guitars of the 20th Century used pots by just a few manufacturers. American pot manufacturers had their own numerical EIA (Electronic Industries Alliance) codes, for example 134 = Centralab, 137 = CTS and 304 = Stackpole.

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