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  1. #1
    Les Paul Forum Member Kim R's Avatar
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    Centralab Pot Codes

    Hi All,

    I've never been an expert on pot codes, but now find myself on the search for some replacement parts for old guitars. I have a couple of example pots on my bench, and might be able to learn a few things from the resident LPF experts.

    Could someone kindly decipher these for me?

    A) 134738
    BA211-1053
    500K-C2

    B) 134319
    BA011-1053
    500K-C2

    C) 1346536
    BA C96 50K


    Thanks, in advance!
    ______________________

    K

  2. #2
    Les Paul Forum Member plaintop's Avatar
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    Re: Centralab Pot Codes

    I'm curious too.

  3. #3

    Re: Centralab Pot Codes

    The 134 is the makers code in this case as you know Centralab. The first one is a 1957 made in the 38th week of that year. The next one is a 1953 made in the 19th week of that year and the last one is a 1965 made in the 36th week of 1965.
    They are 500K which were used in most Gibson's from that time period i don't know what the other #'s mean , but they are most likly batch codes. Hope this helps out a bit.

  4. #4
    Les Paul Forum Member Kim R's Avatar
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    Re: Centralab Pot Codes

    Sunburst1,

    Thank you so much.. !!

    What a resource we have here in shared knowledge!
    ______________________

    K

  5. #5

    Re: Centralab Pot Codes

    Quote Originally Posted by FlyingNotes
    Sunburst1,

    Thank you so much.. !!

    What a resource we have here in shared knowledge!

    Your welcome , but i just leared this stuff by reading reference guides. This info i got from the Gruhn's Guide To Vintage Guitars. You shoud pick it up , it has a lot of great info every one into vintage guitars should know imo.

  6. #6
    Les Paul Forum Member kthesheep's Avatar
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    Re: Centralab Pot Codes

    First 3 Digits:
    Manufacturer of the potentiometer.
    Some common makers (but not all) codes are these...
    137 - CTS
    704 - Stackpole
    140 - Clarostat
    134 - Centralab
    381 - Bourns Networks
    106 - Allen-Bradley
    On some pots, the Manufacturer number is separated by a space, hyphen, or a period.
    If 6 Digits:
    The 4th is the last digit of the year the pot was made between 1947 and 1959.
    If 7 Digits:
    The 4th and 5th Digits:
    These correspond to the last 2 digits of the year of manufacture.
    Last 2 Digits:
    These represent the week of the year of manufacture (01-52). If the last 2 numbers are higher than 52, it is not a pot code, but is probably a part number.
    I hope this is helpful to those who need it. I have found that with "House Brand" guitars such as Silvertone, sometimes pot-code dating is a good way to zero in on date of manufacture since there were so many makers and no real serial number dating systems.


    Kim


  7. #7
    Les Paul Forum Member Kim R's Avatar
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    Re: Centralab Pot Codes

    Thanks, Kim!

    Kim (the other)
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    K

  8. #8
    Les Paul Forum Member Kim R's Avatar
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    Re: Centralab Pot Codes

    Now this will make everyone laugh:

    Anyone have any Centralab 500K pots from 1953 or 54 for sale?? :2lol
    ______________________

    K

  9. #9
    Les Paul Forum Member fretwire's Avatar
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    Re: Centralab Pot Codes

    Also, the "C2" denotes the percent of taper as per Centralab's percent taper chart.

    "Real amps glow in the dark."

  10. #10
    Les Paul Forum Co-Owner TW59's Avatar
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    Re: Centralab Pot Codes

    Quote Originally Posted by fretwire
    Also, the "C2" denotes the percent of taper as per Centralab's percent taper chart.
    Can you post that chart or the info, please? ;)
    Pauls to the walls!

    Hüter der Flammen!

    PLEASE SUPPORT www.burstserial.com !!
    Click here: www.burstserial.com

  11. #11
    Les Paul Forum Member fretwire's Avatar
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    Re: Centralab Pot Codes

    Quote Originally Posted by TW59
    Can you post that chart or the info, please? ;)
    I wish I could. I learned this from a post by Dave P. a while back but his image of the chart he posted in that thread is long gone from his server.

    "Real amps glow in the dark."

  12. #12

  13. #13
    Les Paul Forum Member Kim R's Avatar
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    Re: Centralab Pot Codes

    Thanks to everyone for the nearly instant help! :dude
    ______________________

    K

  14. #14
    Les Paul Forum Co-Owner TW59's Avatar
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    Re: Centralab Pot Codes

    Thanks. :dude
    Pauls to the walls!

    Hüter der Flammen!

    PLEASE SUPPORT www.burstserial.com !!
    Click here: www.burstserial.com

  15. #15
    Les Paul Forum Member kthesheep's Avatar
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    Re: Centralab Pot Codes

    toneomatic,
    Thanks for the chart:yay

    Kim


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