Results 1 to 4 of 4

Thread: Using a dummy coil with Piezo

  1. #1
    Registered User Steve Sorensen's Avatar
    Join Date
    Sep 2009
    Location
    Santa Clarita, CA
    Posts
    2,337

    Default Using a dummy coil with Piezo

    I recently saw a suggestion for using a dummy coil to balance out the impedance of a piezo with installed in a solid body electric.

    Got me wondering if this variation on a Strat wiring set-up would work for Neck-Piezo-Bridge pickups?

    Click image for larger version. 

Name:	Piezo as dummy.jpg 
Views:	22 
Size:	48.2 KB 
ID:	194530

    Steve

  2. #2
    Registered User poul hansen's Avatar
    Join Date
    Jun 2020
    Location
    Danmark
    Posts
    223

    Default Re: Using a dummy coil with Piezo

    Quote Originally Posted by Steve Sorensen View Post
    I recently saw a suggestion for using a dummy coil to balance out the impedance of a piezo with installed in a solid body electric.

    Got me wondering if this variation on a Strat wiring set-up would work for Neck-Piezo-Bridge pickups?

    Click image for larger version. 

Name:	Piezo as dummy.jpg 
Views:	22 
Size:	48.2 KB 
ID:	194530

    Steve
    No idea if it works but you'll need an inductance value and maybe impedance.

    A coil is not just a coil.
    Kentucky KM-805
    Hora M1086 Portuguese II
    Hora M1088 Mandola
    Hora M1087 Octave
    Dean Tennessee Acoustic-Electric
    Richmond RMA-110-VS
    Noname (German?) mandolin
    Mandoline Pochette by Franz Janisch, Wien
    Mandolinetto Neapolitane

  3. #3
    Dave Sheets
    Join Date
    Feb 2015
    Location
    Buffalo NY Area
    Posts
    417

    Default Re: Using a dummy coil with Piezo

    Looks to me like the dummy coil is wired in series with the piezo, so the net impedance would be greater than that of the piezo alone.

    You could build yourself a test rig easily enough, just add a dummy coil pickup in the signal chain outside the instrument and see if you like the changes it produces.


    There would be a small change in the inductance (rolling off some highs), altering the tone a bit, but since the piezo already has a high impedance, I wouldn't expect much of a change in total impedance.

    Most electric guitars with both magnetic and piezo pickups seem to use a powered onboard pre-amp to actively mix the high impedance (piezo) signal with the low impedance magnetic signal.
    -Dave
    Flatiron A
    Way too many other instruments

  4. The following members say thank you to Dave Sheets for this post:


  5. #4

    Default Re: Using a dummy coil with Piezo

    I built a little circuit with a transistor etc, that is powered from a 9v battery. Although it is an amplifier circuit it doesn’t increase the volume but matches the impedance.

  6. The following members say thank you to sonic for this post:


Posting Permissions

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