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500k passive tone pot with a center detent?

Discussion in 'Pickups & Electronics [BG]' started by gebass6, Feb 7, 2016.


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  1. gebass6

    gebass6 We're not all trying to play the same music.

    May 3, 2009
    N.E Illinois
    I have a passive bass.The tone pot has no center detent.Just a constant taper.
    It's been a long time since the last time I've had a passive bass and don't remember if they were all the same.
    Is there such thing?
    500k passive tone pot center detent?
    I've been looking.Everything refers to blend/pickup knobs.
    Or is this only a characteristic of active electronics
     
    Last edited: Feb 7, 2016
  2. Leo Smith

    Leo Smith

    Oct 21, 2009
    Brooklyn, NY
    Passive tone controls don't have a center detent. They go 0 to 100 like a volume control.
     
  3. gebass6

    gebass6 We're not all trying to play the same music.

    May 3, 2009
    N.E Illinois
    OK.
    That answers my question.
    It doesn't exist.
     
  4. Will_White

    Will_White

    Jul 1, 2011
    Salem, OR
    Most passive tones just cut the treble and start with full treble on 10, with a passive system you can only cut so a there's no boost when you turn it one way cut when you turn it the other like an active tone control, if you want an apparent treble "boost" you can cut the bass with a modified TBX tone control so it cuts the bass one way and the treble the other and it would have a center denent.
     
  5. gebass6

    gebass6 We're not all trying to play the same music.

    May 3, 2009
    N.E Illinois
    I was just looking for a passive tone knob that would help me mark the center point of the sweep.
     
  6. Unfortunately, most pots with center detents are linear taper. You want an audio taper for a tone control. Audio taper pots with center detents are rare (possibly nonexistent) because no one would have any use for them. That begs the question of why you want one. What is special about the arbitrarily defined resistance at the center of the rotation?

    In any case, it is possible for you to buy a pot with a center detent and swap the wafer out with a 500k audio taper pot.
     
    Scatabrain likes this.
  7. gebass6

    gebass6 We're not all trying to play the same music.

    May 3, 2009
    N.E Illinois
    That's getting DEEP into something that I didn't intend to get into.
    And don't really understand.

    When I change the knobs I'll just point the set screw at the mid point of the sweep.
     
  8. Nah they do. Bartolini tct preamps have 500KA with centre click. I'd contact Bartolini for spare parts.
     
  9. gebass6

    gebass6 We're not all trying to play the same music.

    May 3, 2009
    N.E Illinois
    Can you tell if this is linear or audio taper?
    The ad doesn't specifically say that it is a tone pot.BARTOLINI Center Detented 500K Pot Potentiometer CD500KA NEW
     
  10. 500kA means 500k Ohms, A taper. The A taper is generally audio.

    Reading further, the listing states that it is audio taper.

    That should be the pot that you are looking for.
     
    gebass6 likes this.
  11. gebass6

    gebass6 We're not all trying to play the same music.

    May 3, 2009
    N.E Illinois
    Thanks!It's ordered!
     
  12. gebass6

    gebass6 We're not all trying to play the same music.

    May 3, 2009
    N.E Illinois
  13. Nice one. Good luck with the bass...
     
  14. Will_White

    Will_White

    Jul 1, 2011
    Salem, OR
    Why do you want a pot with a center denent? I'm genuinely curious.
     
  15. gebass6

    gebass6 We're not all trying to play the same music.

    May 3, 2009
    N.E Illinois
    Post #5 Explained.
     
  16. But what is the reason for wanting to mark the center point of the sweep? For a passive tone control, that is just a random setting.
     
  17. gebass6

    gebass6 We're not all trying to play the same music.

    May 3, 2009
    N.E Illinois
    The halfway point between full on and off.
     
  18. It isn't a halfway point. The taper is not symmetrical.
     
    Leo Smith and Will_White like this.
  19. omie

    omie Supporting Member

    Apr 5, 2011
    Arizona
    Even if it's not 'dead center' it can still help give a quick indication of where you are on the sweep of the knob for fast adjustments.

    I've been gigging with my first active bass the last few months and its occured to me that I wish that indent was on my passives.
     
    gebass6 likes this.

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