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Anti-log master volume pot??

Discussion in 'Amp Tech Center' started by MikeBee, Mar 2, 2021.

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  1. Mar 2, 2021 #1
    MikeBee

    MikeBee TDPRI Member

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    Hi all,
    Working on this amp for a friend. Master volume pot broken off. Back of pot says "Alpha c5k ohm". In googling that, getting a lot of hits "anti-log".

    What does that mean? and
    Is it the appropriate type of pot?
    It does solder into a pc board.

    I do have some electrical experience, a lot of mechanical experience, good at soldering. Any thing I should be aware of? Especially safety wise. Looks like an easy fix. Local shop quoted $160. Thank you, MikeB
    [​IMG]

    [​IMG]
     
  2. Mar 2, 2021 #2
    goldguitarguy

    goldguitarguy Tele-Meister

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    Also known as reverse or inverse taper...It differs from linear and audio tapers. A47029C1-1DFC-4EAA-B410-56B55EF71C2C.jpeg
     
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  3. Mar 2, 2021 #3
    goldguitarguy

    goldguitarguy Tele-Meister

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    Safety wise, amplifiers can hold lethal voltages long after they’ve been turned off and unplugged. If you are not comfortable or don’t have a multi meter it’s best to leave them unplugged 24hrs before working inside the chassis.

    if you have a multi meter and are comfortable you can test the voltages near the filter caps and learn how “drain filter capacitors” online.
     
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  4. Mar 2, 2021 #4
    goldguitarguy

    goldguitarguy Tele-Meister

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  5. Mar 3, 2021 #5
    MikeBee

    MikeBee TDPRI Member

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    Got one ordered plus a couple other items.
    Thanks for the help, MikeB
     
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