Results 1 to 5 of 5

Thread: Jazz PJ wiring issue

  1. #1
    Woodgrinder/Pickupwinder copperheadroads's Avatar
    Join Date
    Jun 2009
    Location
    Iceburg Alley ,Newfoundland,CAN
    Posts
    2,066
    Thumbs Up/Down
    Received: 7/0
    Given: 5/0

    Jazz PJ wiring issue

    I have a Jazzbass with the Precision bass pickup in the neck position & both pickups are wound so the P don't overpower the Jazz .& using the stock pot configuring v/v/t . but the problem I'm having is when both pickups are on full i get a drop in volume & treble & I don't think it is out of phase problems as I've reversed the wires of the jazz pickup & it still didn't correct the problem . Any one know a solution for this ? I've read one thread about "insertion loss" feel free to comment .

    0 Not allowed! Not allowed!
    "UP here in the Canada we shoot things we don't understand"

  2. #2
    Woodgrinder/Pickupwinder copperheadroads's Avatar
    Join Date
    Jun 2009
    Location
    Iceburg Alley ,Newfoundland,CAN
    Posts
    2,066
    Thumbs Up/Down
    Received: 7/0
    Given: 5/0
    Really Nobody ? now i notice this with any jazzbass with both volumes at full you do get a slight treble roll off ..try it

    0 Not allowed! Not allowed!
    "UP here in the Canada we shoot things we don't understand"

  3. #3
    Supporting Member Steve A.'s Avatar
    Join Date
    May 2006
    Posts
    4,447
    Thumbs Up/Down
    Received: 65/0
    Given: 56/0
    I think it has to do with the mismatch of the pickups. If you get a better sound with one pot turned down a little bit (say to 9) you can add a resistor so that the pot never goes to 10.

    I noticed a similar effect when combining a series wired HB with a parallel wired one.

    Steve A.

    P.S. If you need help determining the correct resistor to add post your readings*** here and I will do the math.

    *** I'd need all 3 readings (1-2, 2-3,1-3) with the pot set to 10 and with the pot set to whatever setting works best. (If you can temporarily disconnect the hot leads it would be more accurate.)

    0 Not allowed! Not allowed!

  4. #4
    Better Tone thru Mathematics bob p's Avatar
    Join Date
    May 2006
    Location
    Chicago, USA
    Posts
    4,908
    Thumbs Up/Down
    Received: 38/0
    Given: 0/0
    Isn't this what they call "VVT Syndrome"? Loads of threads on it over at Talkbass.

    0 Not allowed! Not allowed!
    "Stand back, I'm holding a calculator." - chinrest

    "I happen to have an original 1955 Stratocaster! The neck and body have been replaced with top quality Warmoth parts, I upgraded the hardware and put in custom, hand wound pickups. It's fabulous. There's nothing like that vintage tone or owning an original." - Chuck H

  5. #5
    Old Timer Leo_Gnardo's Avatar
    Join Date
    Sep 2012
    Location
    Dogpatch-on-Hudson
    Posts
    4,925
    Thumbs Up/Down
    Received: 82/0
    Given: 57/0
    Quote Originally Posted by copperheadroads View Post
    I have a Jazzbass with the Precision bass pickup in the neck position & both pickups are wound so the P don't overpower the Jazz .& using the stock pot configuring v/v/t . but the problem I'm having is when both pickups are on full i get a drop in volume & treble & I don't think it is out of phase problems as I've reversed the wires of the jazz pickup & it still didn't correct the problem . Any one know a solution for this ? I've read one thread about "insertion loss" feel free to comment .
    Had the same "problem" when I had a Jazz bass. One potential solution in the modern day, a simple FET preamp following each pickup, you could easily make yourself a copy of the old Alembic Stratoblaster for instance, then mix the pre outputs say with a couple 10K resistors.

    With the simple 2-pot mixer in the stock Jazz bass wiring, one pickup gets loaded down by the other when both are on 10 resulting in that loss of treble response. I s'pose you could sum the outputs of each volume pot with a pair of resistors, say 100K to 220K, but that would leave you with a high impedance output, an overall signal loss, and likely easier to pick up hum/buzz on the guitar cable. 3rd solution, same resistance mixer but feed that into a FET preamp within the bass. No easy way out without adding a battery.

    How's them iceburgs?

    0 Not allowed! Not allowed!

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. PJ bass wiring problem
    By StarryNight in forum Pickup Makers
    Replies: 42
    Last Post: 04-04-2018, 09:27 PM
  2. PJ pickup
    By Rodent in forum Pickup Makers
    Replies: 65
    Last Post: 03-19-2015, 06:36 PM
  3. Pickup Wiring Issue
    By bjfly17 in forum Guitar Tech
    Replies: 12
    Last Post: 02-26-2014, 01:33 AM
  4. 5 String Jazz Bass Pickup Issue
    By TheGrateOz in forum Pickup Makers
    Replies: 4
    Last Post: 02-27-2013, 03:58 PM
  5. Fender Power Jazz Bass Special wiring
    By Axtman in forum Guitar Tech
    Replies: 4
    Last Post: 04-01-2008, 04:57 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •