Welp, here's another hard to i.d. pot

Discussion in 'Guitars in General' started by Bruceman, Dec 27, 2009.


  1. Bruceman

    Bruceman Member

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    Pulled my Supro OLD lap steel apart to find this on the pot

    Stackpole
    W401A

    My first thought is, someone will ask if it's a stacked, or double pole. No. Just a volume control. There is no tone control. A one knob special.

    [​IMG]
    [​IMG]


    Any ideas on year?
     
  2. Bluzeboy

    Bluzeboy Member

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    [FONT=verdana,arial,helv,helvetica][SIZE=-1]The source-date code on a pot is a 6 or 7 digit code impressed into the casing of the potentiometer. For speakers this code can be 5, 6, 7 or 8 digits long, and it's ink-stamped or paint-stamped on the "bell housing" of the speaker. [/SIZE][/FONT] [FONT=verdana,arial,helv,helvetica][SIZE=-1]In either case, the code works the same. The first 3 digits on a pot, or the first 2, 3 or 4 digits on a speaker are the source or manufacturer code. [/SIZE][/FONT]
    [FONT=verdana,arial,helv,helvetica][SIZE=-1]The remaining 3 or 4 digits are the date code. In 3 digit dates code, the 1st digit is the last digit of the year. On 4 digits date codes, the 1st and 2nd digits are the last two digits of the year. In either case, the remaining 2 digits are the week of manufacture (01 to 52). With this in mind, remember if the last two digits of the source-date code are greater than 52, you're not looking at the source-date code! [/SIZE][/FONT]
    [FONT=verdana,arial,helv,helvetica][SIZE=-1] Also it's worth mentioning: [/SIZE][/FONT]

    • [FONT=verdana,arial,helv,helvetica][SIZE=-1][/SIZE][/FONT][FONT=verdana,arial,helv,helvetica][SIZE=-1]
    • Sometimes there is a space or hyphen between the manuafacturer code and the year/week code.
    • 3 digit date codes were used in the 1940's and 1950's. Stackpole for example converted from three to four digit date codes in late 1959.
    • 4 digit date codes were used in the 1960's and later (this makes determining the year much simplier!)
    • On 3 digit date codes, you have to "guess" the decade of the pot or speaker. Usually this isn't too difficult.[/SIZE]
      From Vintage Guitars Info - Dating Vintage Pots/Speakers
      [/FONT]
     
  3. Bruceman

    Bruceman Member

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    Thanks, seen that. At least we know it's pre 1959.
    :)
    Sure like to know what year it is.
     

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