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Old CTS Potentiometer's How Do You Tell??

Discussion in 'Amp Tech Center' started by Wicked-T, Jan 13, 2018 at 8:31 PM.

  1. Wicked-T

    Wicked-T Tele-Meister

    Age:
    48
    344
    Apr 1, 2017
    USA
    If there's no markings on it how do you tell that if it's a audio or linear pot??

    Thanks
     

  2. Hobs

    Hobs TDPRI Member

    18
    Sep 16, 2011
    Nashville, TN
    Set it to half-way through the travel, then measure ohms from the ground side terminal to the wiper (middle) terminal. If the reading is, more or less, half of the pot's rated resistance, it's a linear.
    If it's a lot less than half, it's audio.
     
    Thin69 and Wicked-T like this.

  3. Wicked-T

    Wicked-T Tele-Meister

    Age:
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    Thank you I just tested two of them and one is linear one is reversed.
     

  4. moosie

    moosie Doctor of Teleocity Silver Supporter

    Age:
    60
    Jul 18, 2010
    Western Connecticut
    Yeah, I was going to add, if it's a lot more than half, measured to ground side, then it's a reverse audio taper. Which is not to be confused with an anti-log reverse rotation pot.
     

  5. Wicked-T

    Wicked-T Tele-Meister

    Age:
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    One more question, can you hear any sound difference between let's say a
    1.012meg and a .867meg pot's in a amp?
     
    Last edited: Jan 15, 2018 at 2:00 PM

  6. Hobs

    Hobs TDPRI Member

    18
    Sep 16, 2011
    Nashville, TN
    As a volume/gain/level pot, probably not. In a tonestack, maybe.
     

  7. Wicked-T

    Wicked-T Tele-Meister

    Age:
    48
    344
    Apr 1, 2017
    USA
    I'm putting it in my Deluxe amp, it's the tone/power switch knob.
     

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