Wiring Help

Discussion in 'Pickups & Electronics [BG]' started by CH Design, Feb 12, 2014.


  1. CH Design

    CH Design Supporting Member

    Joined:
    Apr 25, 2007
    Location:
    Ottawa, ON
  2. line6man

    line6man

    Joined:
    Jun 20, 2008
    Location:
    Close to Los Angeles, CA
    It cannot be done with a single pole switch. You need a DP3T switch, which takes the form of a 4PDT On/On/On, but is externally jumpered to a DP3T pattern.

    Perhaps more worthwhile would be a separate killswitch.
  3. mrmills

    mrmills

    Joined:
    Jun 22, 2009
    Location:
    Kent, UK
    What pickups (and how many) do you have?
  4. line6man

    line6man

    Joined:
    Jun 20, 2008
    Location:
    Close to Los Angeles, CA
    Pickups have nothing to do with active/passive switching.
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  6. CH Design

    CH Design Supporting Member

    Joined:
    Apr 25, 2007
    Location:
    Ottawa, ON
    I thought it was a DPDT (double pole, double throw) switch. Does that change anything?
    FWIW, I have room for one switch on bass I am building. I don't really need either a mute or active/passive, but since I have the hole drilled for a switch, I want to use it for something. The only switch I have right now is a 3-way (On/On/On). If I can't get all three functions in one switch, I'll just get a 2-way switch for mute or active/passive.

    Two Big Singles.
  7. line6man

    line6man

    Joined:
    Jun 20, 2008
    Location:
    Close to Los Angeles, CA
    It is a SP3T switch that takes the form of a DPDT switch with a "split" middle position that switches one common to a NO throw, and the other common to a NC throw. These kind of switches are usually externally jumpered to SP3T switching patterns, but can be used in specialized applications as DPDT switches for series/single coil/parallel and such.

    The problem is that you need three throws on one of the poles, in order to do active, passive, and mute. You only have two throws on this type of switch, so it is not possible. What you would need is a DP3T mini toggle, which will take the form of a 4PDT switch, with two external jumpers wired in, to create the DP3T switching pattern.
  8. CH Design

    CH Design Supporting Member

    Joined:
    Apr 25, 2007
    Location:
    Ottawa, ON
    Thanks line6man. It sounds like a new switch is in order.
  9. mrmills

    mrmills

    Joined:
    Jun 22, 2009
    Location:
    Kent, UK
    The number of pickups do if you want to use a SPDT/DPDT switch. I just had an idea.
  10. line6man

    line6man

    Joined:
    Jun 20, 2008
    Location:
    Close to Los Angeles, CA
    Nope. It bears no relation to active/passive switching. Active/passive switching takes the single output from volume pots, blends, pickup selectors, etc., after the pickups are summed together in whatever manner is chosen for the bass.

    The exception is when you do active/passive switching for multiple-input preamps. This is a rarity, and typically involves making choices on the nature of pickup selection for passive mode. (Both pickups parallel, additional passive volume controls, etc.)
  11. mrmills

    mrmills

    Joined:
    Jun 22, 2009
    Location:
    Kent, UK
    As I said I had an idea, I don't want to argue with you.
  12. line6man

    line6man

    Joined:
    Jun 20, 2008
    Location:
    Close to Los Angeles, CA
    I'm not arguing. :meh:

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