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Should I ground a magnetic PU?

Discussion in 'Electric Upright Basses (EUB's) [DB]' started by bassteban, May 14, 2005.


  1. This info will be applied to(forgive me)an EUB I'm building, but as I've seen bass guitar pickups rigged up onto DBs I'm posting over here. Anyone who has used a magnetic BG pickup on DB, did you/do you ground the strings? Thank you.

    In my defense, I do own a real bass.
     
  2. paintandsk8

    paintandsk8 Pushin' my soul through the wire...

    May 12, 2003
    West Lafayette, IN
    need more info. Are you using just a mag, and if so what kind? Are you blending this with a piezo? Are you using any type of volume or tone controls?
     
  3. paintandsk8

    paintandsk8 Pushin' my soul through the wire...

    May 12, 2003
    West Lafayette, IN
    I will tell you that the mag set-up I used was active, and therefore a ground wasn't needed
     
  4. Passive w/a volume & tone knob- no piezo on this one, for simplicity's sake. As to which PU specifically, I'm thinking of using 3 halves of a P-Bass unit. I have an idea how to mount it so I can adjust it back & forth(parallel w/the strings)to find the 'sweet spot', if this bass will have one. :rolleyes:
     
  5. Why 3 halves? You making a 6 string?

    With two halves, the P-bass pickup is humbucking - with 3, I suspect you'll lose the noise-cancelling function (or at least some of it) so you might want to consider some extra shielding.
     
  6. I currently have half a P-bass pickup on a one-string bass I made (similar to this: http://www.cnet.ne.jp/atlansia/SOLITAIRE.ARS.JPG )

    It has the 4 pole pieces in line with the string - I've toyed with the idea of making an EUB pickup out of 4 halves of P-Bass pickup, one in-line with each string.

    btw, I did find it helped to ground the the string(s).
     
  7. mje

    mje

    Aug 1, 2002
    Southeast Michigan
    Easy answer: Try it, and if it hums, ground the strings to the signal ground. Whether it hums will depend on your pickups, preamp and strings.
     
  8. paintandsk8

    paintandsk8 Pushin' my soul through the wire...

    May 12, 2003
    West Lafayette, IN
    Yeah, that's definetly your best bet. Try it out before your final installation though, no need drilling unnecessary holes or anything like that.
     
  9. Because of the neck angle I'm using, the strings(& consequently the pickup)will be much higher above the body than most EUB, & any BG I've ever seen, so I don't know what I can do for shielding. I really gotta get some pics up. :rolleyes:
     
  10. It sounds like the only potential problem re:grounding vs not grounding would be hum or noise- not(pardon my stupiditiveness)a low-voltage electrical shock?
    And thanks for all the input, guys.
     
  11. paintandsk8

    paintandsk8 Pushin' my soul through the wire...

    May 12, 2003
    West Lafayette, IN
    Well there is some danger with getting shocked in certain circumstances when using string grounding. There is alot of info about that in the pickups forum on the BG side pickups forum, if you wanted to research it.