Bartolini P+J problems

Discussion in 'Pickups & Electronics [BG]' started by thmsjordan, Feb 18, 2010.


  1. thmsjordan

    thmsjordan

    Jan 10, 2010
    Eschew Obfuscation
    I recently put together a Warmoth Fretless bass and used Bartolini pickups with the build.

    Precision pickup was a 8CBP pickup
    Jazz pickup was a split coil 9J-L1

    I used this wiring diagram
    http://www.bassemporium.com/pdfs/pjbassstandard.jpg

    I used 250k audio taper pots and had a luthier check my work as soon as gremlins showed up. It all checks out OK.

    My problems are as follows:

    1. When the P bass pickup is full up and the J pickup is added to the mix, it loses low end and the bass is somehow cancelled out, leaving a more J like tone. Frustrating when just adding the J pickup for seasoning as I like to do.

    2. The taper of the pots seems off. Both pots are extremely low volume until the last tiny bit of the range of the pot. I thought this might be due to a wrong taper pot but after replacing them, the problem remains.

    3. While the resistance of the pots checks out on a meter and they both adequately zero out any signal while on the meter, the bass has a low volume even when the pots are completely down.

    I am completely out of my depth here, I do not understand these problems, and while I can solder a circuit well (electrician dad - he is stumped too) I can't see any reason other than using a wrong wiring diagram that these problems are occurring.

    Any ideas?
     
  2. Primary

    Primary TB Assistant

    Here are some related products that TB members are talking about. Clicking on a product will take you to TB’s partner, Primary, where you can find links to TB discussions about these products.

     
    Aug 1, 2021

Share This Page

  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.