Resonator

Discussion in 'Other Guitars' started by gasket, Apr 4, 2018.

  1. gasket

    gasket Active Member

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    Hi all, I'm in the early stages of putting together a "PitBull" electric resonator kit.
    It came with pre-wired pots, I've made a drawing (attached) but no instruction on how to connect the mini-humbucker or Peizo. I understand the Piezo may require a pre-amp but the humbucker doesn't yet no pre-amp or switch in the kit.
    Any experience out there fitting Peizos into electric guitars?

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    Last edited: Apr 4, 2018
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  2. plankton

    plankton Well-Known Member

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    I can't answer your question, but I've seen this kit and was interested, kind of like an old Mosrite.

    Please keep us updated on the build, I'd love to hear your thoughts on the process as well as on the finished product.

    Good luck!
     
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  3. gasket

    gasket Active Member

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    The first PitBull kit I did was straightforward. This one isn't for beginners, early days and it's fighting me at every step. I'll win the wood, glue and paint war but require help with the wiring plan.
     
  4. gasket

    gasket Active Member

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    The first job was to increase the humbucker cavity width to allow pickup to fit between the neck and cone cover.

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    Done!

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    I'm still desperate for some help with the Peizo wiring, any help welcome.
     
  5. Dave Johnson

    Dave Johnson Well-Known Member

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    Got your message Mr. Gasket!
    I have successfully used piezos before without a preamp, however they will sound pretty harsh & bright
    without a lot of tone tweaking on the amp.
    My best luck has been 250k pots with piezos, tends to tame a bit of the harshness.
    With two volume pots it will be more manageable, plus giving you the ability to blend.

    So first, I'd replace that middle 500k pot with a 250k pot and wire lug #1 to the back of the pot as shown on
    your diagram. That will be the piezo volume pot.

    The piezo strip has to sandwich between the saddle & the spider. String pressure excites it.
    Another way would be with a contact piezo epoxied directly to the cone.

    Snip the mini plug off the piezo and separate the hot + from the shield.
    Then wire the piezo + to the middle lug #2 and ground the braided wire.
    Next wire lug #1 to the back of the 500k pot, this will be humbucker volume.
    Now wire your mini humbucker + to the middle lug #2 on the humbucker volume and ground the braded wire.

    The last pot is your tone pot. It's good to go as is.

    Pickups are now wired up.

    Next step is a string ground for the humbucker.
    Somehow you have to get that long ground wire from the back of the pots, to the tailpiece.
    Hopefully you will have access thru the control cavity, if not, just one more hole to drill.


    Then you're done! Have a well deserved beer!
     
    Last edited: Apr 5, 2018
  6. gasket

    gasket Active Member

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    Dave, thank you very much "once again" for sharing. You may recall you supplied the Seymour Duncan pickups that transformed my 12 string 335 a year or so back :-)

    My understanding of your instructions is ...

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    If so, is the A500K pot OK, or should it be changed to a B500K and should the 250 and 500 B pots be changed to A type?

    You said, "I have successfully used piezos before without a preamp, however they will sound pretty harsh & bright without a lot of tone tweaking on the amp". Are you suggesting if I can find a preamp small enough to machine into the thin solid body the result should be a noticeable positive softening of the tone? Remember this Piezo is for a resonator not a classic toned acoustic.
     
  7. Dave Johnson

    Dave Johnson Well-Known Member

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    You don't NEED a preamp with the piezo.
    Like you said, you're not expecting a clean "acoustic" sound, and the piezo will add some hair & bite that the mini bucker may be lacking.
    The separate volumes for each pickup will provide ample blending of the two signals, eliminating the need to complicate things with a blend pot and or 3 way switch.
    The diagram is perfect as it is now . Things will work as discussed.
    The A & the B on the pots is just the taper of the pot. A is audio, B is linear.
    They do the same things, just behave differently doing it. I use A on everything. Makes life easier.

    I realize that where you are, finding a 250k pot may be challenging. Yes the 500k will work, it will just let a bit more signal thru.

    Don't forget the string ground to the tailpiece.
     
  8. gasket

    gasket Active Member

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    Sorry to over work my question ... if I set it up as per your instruction, will I have the ability to blend the sound AND turn either the Peizo or mini-humbucker volume to zero giving the same result as switching between pickups?
     
  9. Dave Johnson

    Dave Johnson Well-Known Member

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    Yes Sir! the beauty of independent wiring.
     
  10. gasket

    gasket Active Member

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    GREAT!!!
    Thanks heaps Dave, I'm hoping to set the neck this weekend. I'll chase up a 250K pot and update this thread as the job progresses.
     
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  11. gasket

    gasket Active Member

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    Finally got the glue to set the neck, it isn't a race. :D

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  12. Logan

    Logan Well-Known Member

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    Beautiful!
     
  13. gasket

    gasket Active Member

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    The wiring shown (photo in post #6) prepared under Dave Johnson's instruction will be put together soon now that the job is gathering momentum. Any comments please regarding using the kit supplied cap (2A473J) in following photo. The numbers mean nothing to me, it's a part of the original supplied harness with THREE 500K pots. I'll be running a 500K volume pot for the mini humbucker, a 250K volume pot for the Peizo and a 500K pot for tone.

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  14. Dave Johnson

    Dave Johnson Well-Known Member

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    The cap numbers signify a 100v .047uf cap.
    Perfect for this application.
    You're headed in the right direction.
    Love watching the progress in these creative threads.
     
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  15. gasket

    gasket Active Member

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    Great stuff, a small $ saving and a bigger time saving chasing about for another.
    Thanks kindly for your input!
     
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  16. eS.G.

    eS.G. Well-Known Member

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    this thread looks familiar
     
  17. gasket

    gasket Active Member

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    Today I found time to put some wire between the upgraded DiMarzio pots. Fine soldering isn't something I'm claiming any skill at but when tested it does exactly what it should. Some insulating to prevent any earthing out and it will be time to move on to making a bridge and stringing it up.

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  18. gasket

    gasket Active Member

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    As planned I wanted this kit to make acoustic and electric noise before any attempt to finish. It now breathes and I'm very pleased with the sound. I say sound rather than tone at this early stage. Nothing is really screwed up yet I haven't even cut the bridge grooves. I'm also glad I assembled before paint as I'm not so sure now, small possibility I may run with a natural timber look. I'm liking what I see, will live with it for a couple of days.
    Rubbish photo quality, I must stop taking photos at night in this badly lit room.

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  19. gasket

    gasket Active Member

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    Been two weeks but finally had a little time to advance the job.
    Cut a shape (from square) on the headstock and considering all of the chrome on the body am toying with a polished alloy headstock veneer. With tuners fitted and a custom logo breaking it up I'm thinking it could work.
    Opinions welcome.

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    A quick mock up to get the vibe.

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  20. gasket

    gasket Active Member

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    Made the decision, glued and clamped early today.
    Late afternoon clean up, screw the tuners on.
    Sitting back, long hard look, decided I'm happy with it :-)

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