Gibson potentiometer dating

gibson potentiometer dating

Are all Gibson potentiometers the same?

As always with Gibson, there a probably many vintage guitars that dont conform to the catalog descriptions, which are often incomplete and may even contain errors. Gibson pots are NOT all the same. Most 60s-70s Gibson potentiometers were made by CTS (Chicago Telephone Company), although other manufacturers did also supply pots to Gibson.

How do you date a potentiometer on a guitar?

Pot dates can be a useful tool in dating guitars. But remember this is the date that the potentiometer was produced. Pots in an older guitar may have been replaced, and this should be considered, especially if the date suggested does not fit with other features of the guitar.

What do the numbers on a Gibson pot code mean?

One is the manufacturers id code with date, and another is the Gibson part number. The manufacturers code has six (1950s) or seven digits, starting with 137 (CTS) or 134 (Centralab), and ending in format y/ww or yy/ww [where y is the year, and w is the week of the year]. For more information on Gibson pot codes (and others), see Reading Pot Codes

How many digits are in a potentiometer date code?

The four digit codes will have two digits for the last two numbers of the year and two digits for the week of the year. One problem with potentiometer date codes is that they are often covered up with solder!

Who made Gibson potentiometers in the 60s?

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.

Are all Gibson pots the same?

As always with Gibson, there a probably many vintage guitars that dont conform to the catalog descriptions, which are often incomplete and may even contain errors. Gibson pots are NOT all the same.

How is a potentiometer used in a guitar circuit?

A potentiometer can be used in one of two ways – as a voltage divider (fig 1) or as a variable resistor (aka rheostat – fig 2). Potentiometers in guitar circuits are used to control volume and tone. For volume applications, they are configured as voltage dividers and for tone they are wired as variable resistors.

What do the numbers on a Gibson pot code mean?

One is the manufacturers id code with date, and another is the Gibson part number. The manufacturers code has six (1950s) or seven digits, starting with 137 (CTS) or 134 (Centralab), and ending in format y/ww or yy/ww [where y is the year, and w is the week of the year]. For more information on Gibson pot codes (and others), see Reading Pot Codes

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 do the numbers on a potentiometer mean?

Potentiometer values are often marked with a readable string indicating the total resistance, such as 100k for a 100 kΩ potentiometer. Sometimes a 3 digit coding system similar to SMD resistor coding is used. In this system the first digits indicate the value and the last digit indicates the multiplier.

How many digits are in a 4 digit date code?

The four digit codes will have two digits for the last two numbers of the year and two digits for the week of the year. 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.

What does the 4 digit EIA code mean on potentiometers?

With 4 digits, the first 2 digits are the last 2 digits of the year. IRC (International Resistive Company) used a different date code system. Example: 214 4190 500k 6 27 is produced in July (week 27), 195 6 . Not all manufacturers have or use an EIA code on the potentiometers.

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