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P/J bass wiring with V/T/ 3 way toggle switch?

Discussion in 'Pickups & Electronics [BG]' started by Skywalker83, Feb 1, 2010.


  1. Skywalker83

    Skywalker83

    Joined:
    Oct 19, 2008
    Location:
    Tampere, Finland
    I've found a few p/j wiring diagrams, but cant find the right one for my wishes. Can anyone point me in the right direction? Line6man?

    Master volume/ Master tone/ 3 way toggle switch
     
  2. Rickett Customs

    Rickett Customs

    Joined:
    Jul 30, 2007
    Location:
    Southern Maryland
    Disclosures:
    Luthier: Rickett Customs...........www.rickettcustomguitars.com
    The pickups (+) would first go to the 3way toggle (outer lugs). center lug of the 3way will go to the master volume, then to the tone, there should also be a grounding point on the toggle itself...... sorry no diagram handy currently....
     
  3. line6man

    line6man

    Joined:
    Jun 20, 2008
    Location:
    Close to Los Angeles, CA
    [​IMG]

    I have this diagram is with the tone control running after the volume, like on a Jazz bass.
    Did you want it running before the volume like on a P?
     
  4. Rickett Customs

    Rickett Customs

    Joined:
    Jul 30, 2007
    Location:
    Southern Maryland
    Disclosures:
    Luthier: Rickett Customs...........www.rickettcustomguitars.com
    You da man.
     
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  6. JTE

    JTE Supporting Member

    Joined:
    Mar 12, 2008
    Location:
    Central Illinois, USA
    Yeah, the output of the switch goes to a regular P-Bass style volume/tone control segment, and the PUPs go before the switch. Basic current flow tells you the rest.

    John
     
  7. Skywalker83

    Skywalker83

    Joined:
    Oct 19, 2008
    Location:
    Tampere, Finland
    Yeah Line6man, i'm looking for it running before the volume like on a P bass.
     
  8. line6man

    line6man

    Joined:
    Jun 20, 2008
    Location:
    Close to Los Angeles, CA
    Ok, quick redraw...
    [​IMG]
     
  9. Arvin

    Arvin Underwound Supporting Member

    Joined:
    Sep 26, 2008
    Location:
    On the bench
    Not to hijack the thread or anything, but what differences could one expect from the two different wiring schemes? (volume before tone vs. tone before volume)

    I've wondered this for a while, but haven't been curious enough to go to the trouble to re-wire one of my P-basses and A/B them.
     
  10. H3R3T1K

    H3R3T1K

    Joined:
    Nov 4, 2013
    Location:
    Freiburg im Breisgau, Germany
    Been wondering about the same question. What's the tonal difference between having the tone before or after the volume? Thinking about rewiring my PJ (vol/blend/tone) using one of the two schemes.
     
  11. line6man

    line6man

    Joined:
    Jun 20, 2008
    Location:
    Close to Los Angeles, CA
    It is not desirable to have the tone control parallel to the output, when the volume pot is wired with its wiper terminal as the output. This is because the signal impedance in this part of the circuit varies considerably with the volume pot's setting. It works better when the tone control is parallel to the pickup, because the impedance is less variable there.
     
  12. KingRazor

    KingRazor

    Joined:
    Jun 4, 2010
    Location:
    Beaverton, Oregon USA
    I'm sure this is obvious to anyone who understands wiring but for ignorant people such as myself...

    Does the tone control being parallel to the pickup mean it comes before or after the volume?
     
  13. line6man

    line6man

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    Jun 20, 2008
    Location:
    Close to Los Angeles, CA
    Before.
     
  14. H3R3T1K

    H3R3T1K

    Joined:
    Nov 4, 2013
    Location:
    Freiburg im Breisgau, Germany
    So having a J-bass wired P-bass style is actually "better"?
     
  15. line6man

    line6man

    Joined:
    Jun 20, 2008
    Location:
    Close to Los Angeles, CA
    There is only one way to wire a Jazz bass if you want two volumes and a tone. There is no choice but to use the wiper terminals of the volume pots as inputs (To avoid muting the output, when either volume is rolled down.) and the tone control parallel to the output. (To allow it to work over both pickups when the volumes are turned down.)

    Note, however, that the tone control is parallel to the output, but this is the part of the circuit with the least variation in signal impedance, since the wiper terminals on the volume pots are used as inputs.
     
  16. KingRazor

    KingRazor

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    Location:
    Beaverton, Oregon USA
    Do you have this same limitation if you use a blend pot?
     
  17. line6man

    line6man

    Joined:
    Jun 20, 2008
    Location:
    Close to Los Angeles, CA
    A blend pot is two volume pots in inverse-parallel. So the tone control goes after it. Usually, there is also a master volume pot with its wiper terminal wired as an output, so the tone control goes parallel to the connection between volume and blend.
     
  18. acebase62

    acebase62 Supporting Member

    Joined:
    Jun 29, 2010
    Some of the 1980s Fender Jazz Bass Specials (P-J pickups, MIJ) came stock with V-V-T and a 3 way toggle switch. In the middle position, both pickups were on, but each had their own volume.

    I found this setup more versatile than the V-T with a 3 way switch found on some of the 1980s Yamaha BB basses.
     
  19. T. Brookins

    T. Brookins Supporting Member

    Joined:
    Oct 21, 2003
    Location:
    Saint Louis MO. USA, Earth.
    Switching the two occupied terminals on the tone pot shouldn't make a difference, right? The "seen" Impedance of the output shunted to ground through the capacitor will be the same. Tone before volume is better because a change in impedance affects rolloff characteristics.
     

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