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Push/pull volume on a PJ bass wiring, no time control, can it be done?

Discussion in 'Pickups & Electronics [BG]' started by Morson93, Oct 22, 2016.


  1. Morson93

    Morson93

    Jan 27, 2009
    Okay so i've just modded one of my jazz basses to fit a PJ set and i was considering using a 3 way switch, however i've got one of the "hoppus" style pickguards and kind of want to keep the simple look with one volume control. So i got thinking and was wondering if it would be possible to wire a coil tap pot (CTS Audio Taper) with both pickups on when it's down, and just the P pickup when pulled up? Incase anyone is curious, the pickups are a set of Seymour Duncan quarter pounders

    Thanks!
     
  2. walterw

    walterw Supportive Fender Gold Supporting Member Commercial User

    Feb 20, 2009
    alpha-music.com
    that's not a "coil tap" pot, it's just a push-pull pot.

    yes, you can absolutely do that, it's pretty easy.

    i recommend a 500k linear push pull.
     
    Killed_by_Death likes this.
  3. Morson93

    Morson93

    Jan 27, 2009
    That must be where i've been going wrong then!

    I've been searching for a diagram but can't find any for just the one volume pot,

    Do you have any idea where i could find one or anyone who could draw one up?

    Thanks!
     
  4. Morson93

    Morson93

    Jan 27, 2009
    Could anyone please point me in the right direction on wiring this configuration?

    Preferably with a diagram of some sort?

    Thanks guys!
     
  5. I'll draw a diagram, tonight.

    All you are doing is wiring your pickups in parallel, with a switch on one of them. You shouldn't need a diagram for that.
     
    lz4005 likes this.
  6. Crater

    Crater

    Oct 12, 2011
    Dallas, TX area
    I can draw schematics, but I don't do pictorial 'diagrams'.... :unsure:

    PJ1V0TPPJpup_zpstyi4erar.

    L1, L2 is the P pickup; L3 is the J pickup, R1 is the master volume, S1 is the switch on the push-pull pot. I drew it as a DPDT switch because every push-pull pot has a DPDT switch; this diagram shows you only need to use 2 of the 6 terminals on the switch. Use an ohm meter to confirm which contacts are connected with the switch in the down position.
     
    SteveCS likes this.
  7. Morson93

    Morson93

    Jan 27, 2009
    Huge thank you for the drawing Crater, but I have one question. If the switch is S1 but the master is R1, would I need two pots? Or would I wire the P like a standard pot, and then the jazz to 2 of the 6 terminals?
     
  8. Morson93

    Morson93

    Jan 27, 2009
    IMG_2510.JPG

    IMG_2511.JPG

    The pot I have is a CTS SPST style pot, it only has 2 terminals underneath the pot? Could I simply wire the jazz to the 2 terminals underneath?
     
  9. honeyiscool

    honeyiscool Supporting Member

    Jan 28, 2011
    San Diego, CA
  10. testing1two

    testing1two Gold Supporting Member

    Feb 25, 2009
    Southern California
    img_2510-.
    Pot:
    Left (#1) - Signal wire from P pickup
    Middle (#2) - wire to Output jack tip (+) terminal
    Right (#3) - ground

    Switch*:
    Left: Signal wire from J pickup
    Right: jumper wire to volume pot lug #1
    *If switch operation is backwards, reverse these wires

    Pot Casing (grounds):
    Ground/- wire from P pickup
    Ground/- wire from J pickup
    Ground wire to output jack sleeve (ground) terminal
    Ground wire from bridge
     
    Morson93 likes this.
  11. Crater

    Crater

    Oct 12, 2011
    Dallas, TX area
    Is that a push-pull pot? It looks like one of those volume pots with the built-in on/off switch that are used on table radios. In other words, turning the pot all the way to zero and then a little further turns the switch clicks off (open). If that's the case, that won't work for what you want to do.
     
  12. testing1two

    testing1two Gold Supporting Member

    Feb 25, 2009
    Southern California
    I think it's one of these: http://www.stewmac.com/Pickups_and_...n=2016-10-gp&gclid=CJKylP3l9s8CFYJmfgodbb0Dmw
     
    Crater likes this.
  13. Morson93

    Morson93

    Jan 27, 2009
    Perfect, thanks very much dude I'll give that a try tomorrow!!


    Nope, definitely a push/pull, I have one on a Ibanez to split my invader!
     
    Crater likes this.
  14. Morson93

    Morson93

    Jan 27, 2009
    Thanks for all your help guys, now I can finally get this project finished!

    Will post pics when all is finished if anyone interested!
     
  15. I didn't get to draw the diagram in time, but it looks like we have this covered now. Cheers.
     
    Morson93 likes this.
  16. Hopkins

    Hopkins Supporting Member Commercial User

    Nov 17, 2010
    Houston Tx
    Owner/Builder @Hopkins Guitars
    I would suggest against that CTS push/pull in favor of one with a DPDT type switch. You don't need a DPDT but I have used one of those types of CTS push/pulls and found them to be extremely over sized and very sloppy feeling. They are just not a good product IMHO

    I have never had any issue with the ones that look like this
    pushpullpot.
     
    walterw, rojo412 and line6man like this.
  17. Morson93

    Morson93

    Jan 27, 2009
    IMG_2546.JPG IMG_2544.JPG IMG_2547.JPG Finally got the time to try this out, and it worked a treat!! Thanks for the input everyone and especially to testing1two!
     
  18. walterw

    walterw Supportive Fender Gold Supporting Member Commercial User

    Feb 20, 2009
    alpha-music.com
    +1

    it'll work fine, but that big SPST pot is made for amps, the push-pull part is really too stiff for instruments. the bourns push-pull (and even push-push) pots are excellent and feel "normal" in the guitar.
     

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