Push-pull for tapped Humbucker?

Discussion in 'Luthier's Guitar & Bass Technical Discussion' started by JingleJungle, Jul 6, 2006.


  1. JingleJungle

    JingleJungle Member

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    I had a HB wound w/ a tap @ 75% of the winds (full DC resistance is 13.5 KOhm, alnico V mag).
    I'm just wondering...can I use a plain push-push (or pull) DPDT pot in order to access both windings or must I use something more exotic?
    I happened on this guy's schematics collection and I notice that he is indeed using a 6 way on-on-on switch on the schematics that call for a tap.

    Any suggestions?

    Thx,

    JJ
     
  2. Jim Collins

    Jim Collins Member

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    Does your pickup have six leads, plus an independent ground for the base? That is what it would have if each coil had a true tap -- each coil would have one beginning, one middle (tap), and one full end. A push/pull with a DPDT is what you need.
     
  3. stratzrus

    stratzrus Philadelphia Jazz, Funk, and R&B Supporting Member

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    Eddie Carlino told me that push-push pots are less likeley to pop when switching. If you want to explore this, he can be reached at Carlino Guitars after 3PM.

    stratzrus
     
  4. JingleJungle

    JingleJungle Member

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    OK, here I am again...
    Yes, the p.up has indeed 6 leads + indipendent ground.
    Guess I'm cool w/ the push-push pot, then.

    FWIW however I've noticed that the ones Nik Huber uses (Yamaha IIRC - and fairly expensive) every now and then do pop.
    Why is that, BTW?

    Best,

    JJ
     
  5. Jim Collins

    Jim Collins Member

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    Push/push pots also seem to be more prone to failure than push/pulls. Why that is, I don't know.
     
  6. stratzrus

    stratzrus Philadelphia Jazz, Funk, and R&B Supporting Member

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    Thanks Jim, I hadn't heard about reliability issues with push/push pots.

    If true, maybe it's because they require some sort of spring action to return from in to out, unlike push/pull. More parts often equal less reliability, but it would be interesting to know the failure rate and expected mechanical life of the two.

    stratzrus
     
  7. DigitalTube

    DigitalTube Member

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    I agree, I've had mine replaced twice, they only lasted a few months, next time will replace with Push/pull.
    E.B.
     
  8. Festus

    Festus Supporting Member

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    Yup, I'll second the push/push failure problem. I've had several go bad in just a few month's time. Went back to push/pull pots.
     

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