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Wiring/Component Question

Discussion in 'Pickups & Electronics [BG]' started by meycom, Jun 16, 2019.

  1. Jun 16, 2019 #1
    meycom

    meycom Supporting Member

    Nov 29, 2008
    Southern Wis.
    I have a US Masters 5 string bass that has an interesting component
    in the wiring(pic's). It almost looks like a pickup and I'm looking into the way
    it is wired. Is it possible it is something like a signal booster(transformer)??
    It is all passive.
    Any ideas ???

    Jeff
    20190616_131824.jpg 20190616_131830.jpg
     
    Last edited: Jun 16, 2019
  2. Jun 16, 2019 #2
    CharlieB

    CharlieB

    Jun 15, 2019
    Have no idea what that is.... but just for grins, maybe its an inductor? I know that Bill Lawrence made some bass worthy Q-Filters (inductors) that when dialed in thru a tone control, replacing the capacitor, would scoop out the mids, rather than cut highs.
     
  3. Jun 16, 2019 #3
    Paulabass

    Paulabass

    Sep 18, 2017
    Dummy coil for noise reduction?
     
    Rock Salad and NKBassman like this.
  4. Jun 16, 2019 #4
    meycom

    meycom Supporting Member

    Nov 29, 2008
    Southern Wis.
    Thanks for the feedback guys, still trying to wrap my head around the wiring. There are two
    SPDT switches there, that I thought were coil splitters. Nope.
     
  5. Jun 16, 2019 #5
    Slater

    Slater Leave that thing alone.

    Apr 17, 2000
    The Great Lakes State
    That would be my guess, but I really don’t know…
     
  6. Jun 17, 2019 #6
    Arie X

    Arie X

    Oct 19, 2015
    and that thing was just stuffed in there?
     
  7. Jun 17, 2019 #7
    Crater

    Crater

    Oct 12, 2011
    Dallas, TX area
    Looks like someone used half of a p-bass pickup (and coil form) to make a "varitone" inductor.
     
  8. Jun 17, 2019 #8
    IamBF

    IamBF

    Mar 4, 2019
    Crystal Lake, IL
    I like your profile pic!
     
    meycom likes this.
  9. Jun 17, 2019 #9
    meycom

    meycom Supporting Member

    Nov 29, 2008
    Southern Wis.
    I used to play with a guy from Crystal Lake!!
     
  10. Jun 17, 2019 #10
    meycom

    meycom Supporting Member

    Nov 29, 2008
    Southern Wis.
    Yep, just loose in there?? I'm working on a wiring schematic for it..
     
  11. Jun 17, 2019 #11
    meycom

    meycom Supporting Member

    Nov 29, 2008
    Southern Wis.
    Yes, that's exactly what it looks like!! A P-Bass pickup.
     
  12. Jun 18, 2019 #12
    Versatek6

    Versatek6 Fretless is like Trombone

    Oct 7, 2008
    Twin Cities, MN
    It's a sealed circuit, epoxied into a P-bass pickup casing.
    Here is how USM described the circuit:

    upload_2019-6-18_11-25-33.png

    As I understand, it is a notch filter, which narrows the badwidth of wide-range pickups. It works like a parametric EQ, but in a fixed frequency range. I believe the EQ Type switch has a middle position that bypasses the circuit, making the tone knob a regular treble roll-off.

    upload_2019-6-18_11-38-4.png
     
  13. Jun 18, 2019 #13
    Arie X

    Arie X

    Oct 19, 2015
    huh, i actually have a coil winder and can wind small choke coils, and etc.. with it. maybe someday i'll experiment.
     
  14. Jun 18, 2019 #14
    Killed_by_Death

    Killed_by_Death Snaggletooth Inactive

    Jan 2, 2015
    14 Megameters from Groong Tehp
    I'm sure the question we're all thinking now is:

    Does it perform as advertised?