pot resistance question

Discussion in 'Luthier's Guitar & Bass Technical Discussion' started by buddastrat, Jul 1, 2008.

  1. buddastrat

    buddastrat Member

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    Say a humbucker is run with a 250K pot for volume and no tone control vs. a 500K vol and 500K tone in a normal strat circuit. Is the load the same?


    I've often run a 250K volume pot with no tone control for my strat humbucker in the bridge positions. I like using 250K because the taper is much more gradual for adjustments and swells. 500K always jump. I've tried the RS pots and they still don't swell as nice as a 250K. The best 500K I had were some Hamer pots made by CTS. These were $12 a piece!

    For an HSS I know there's a resistor trick for using a 500K pot and allowing the singles to see 250K, but then I'd be stuck with that crappy taper of a 500K, correct?

    Anyone find some 500K that do swell real gradually? I'm thinking it's just because the pot has the same amount of rotation as a 250K that it simply can't be as gradual.
     
  2. Jack Briggs

    Jack Briggs Member

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    There is the difference of 250K in the load.

    A better way to do what you want is keep the 500K pot for volume, change out the tone to 250K. On the volume pot, solder a 220K 1/4 watt resistor across the input and output (left leg and wiper, viewed from the bottom). This will even out the taper without affecting the tone.
     
  3. testing1two

    testing1two Gold Supporting Member

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  4. buddastrat

    buddastrat Member

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  5. EADGBE

    EADGBE Member

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    Yes the load is the same.

    1000K+1000K=500K load.

    500K+500K=250K load, etc.

    And I don't think the cap adds any load per say.
     
  6. buddastrat

    buddastrat Member

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    Wait a minute, then I misunderstood what Jack said. I thought he said there's a difference.

    I don't use a tone control for the bridge pickup, and prefer to just use a 250K, for simplicity and the taper works so nice. I just don't want to lose too much highs.

    So on Gibson that come with 300K pots running a vol and tone, would that be 150K load for each humbucker? Wouldn't that be real muddy/muffled?
     
  7. EADGBE

    EADGBE Member

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    Yes.
    Well they're pretty dark sounding. And some might say more beefy sounding.
     

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