J-bass series wiring, used P-bass schematic. Tone pot issue.

Discussion in 'Pickups & Electronics [BG]' started by Hagelslag, Jul 29, 2009.

  1. Hagelslag

    Hagelslag

    Dec 19, 2008
    The Netherlands
    Hi,

    I have a J-bass (with split coil Nordstrand's) on which I never use the bridge pup, so this evening in an experimental mood I rewired the pickups in series just to hear what it sounds like.

    I didn't use any push pull switches but just used a P-bass schematic for Volume/Tone controls and wired the pickups in series with each other (hot of neck pup to ground of bridge pup).

    The result was quite pleasing I must say, but the tone control didn't seem to do that much. Some difference in tone was noticable, but it stayed on the bassy/ darkish sound.

    I then switched the 0.047 cap for a 0.022 i had lying around and the sound did get brighter, but now hardly any change can be heard when turning the tone pot.

    So now my questions:

    Is this due to using 250K pots while the 2 pickups where both already humbuckers (2 split coil Nordstrands)? If yes, should I switch to 500K pot's?

    Or is using a P-bass wiring schematic wrong?

    And finally, how do I get a tone control in there with some more variety?

    Thanks!
     
  2. jworrellbass

    jworrellbass Commercial User

    May 17, 2009
    Colorado Springs CO
    Owner, builder: jworrellbass
    If you have humbuckers you should use 500k or even a 1meg pot. As far as wiring goes google jazz bass, don't use the stew mac diagram they have the tone pot wrong.
     
  3. slyjoe

    slyjoe Supporting Member

    Jun 28, 2008
    Valley of the Sun (AZ)
    Why is the stew mac tone pot wiring wrong?
     
  4. jworrellbass

    jworrellbass Commercial User

    May 17, 2009
    Colorado Springs CO
    Owner, builder: jworrellbass
    The wire from the volume pots should go to the center lug of the tone, they have it going to one of the outer lugs. I wired a bass like Stew Mac's drawing and it sounded like crap. After looking and looking I finally googled another jazz bass diagram, wired it like the picture and low and behold it sounded great. www.axesrus.com/images/BASS1.jpg That's what I used.
     
  5. slyjoe

    slyjoe Supporting Member

    Jun 28, 2008
    Valley of the Sun (AZ)
    You may have something else wrong with the wiring - it doesn't matter if you go to the center lug or the outer lug - you just have to move the cap up a lug (and get the correct outer lug, otherwise it will work backwards).

    However you wire it, electrically it is just a variable resistance in series with a capacitor to ground.
     
  6. jworrellbass

    jworrellbass Commercial User

    May 17, 2009
    Colorado Springs CO
    Owner, builder: jworrellbass
    I tried the stew mac and it didn't work. I tried the link I put up and it worked. I talked to a tech at a local guitar shop and he had the same problem.
     
  7. Hagelslag

    Hagelslag

    Dec 19, 2008
    The Netherlands
    Thanks, I'll try 500K's when i get the chance.

    I connected the two pickups in series, basically making it one big pickup, so I don't see the problem in using a P-bass wiring. Is there one?

    I did keep the cap location on the tone pot the same btw (wire from volume to center lug and cap to ground on outer lug).
     
  8. jworrellbass

    jworrellbass Commercial User

    May 17, 2009
    Colorado Springs CO
    Owner, builder: jworrellbass
    Sounds like it sould work.
     
  9. Hagelslag

    Hagelslag

    Dec 19, 2008
    The Netherlands
    Yes, I does work. Badass sound, but very little tonal variation. Think I'll just do the push/pull switch thing.

    Tnx.