PR vintage footswitch wiring

Discussion in 'Amp Tech Center' started by jsnwhite619, Apr 17, 2019.

  1. jsnwhite619

    jsnwhite619 Friend of Leo's

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    I just finished up a Princeton clone and the generic footswitch I got didn't work right - tremolo would cut off either way, but reverb buzzed really loud when on, nothing when off. I've never owned/used one before, so any help how to rewire this one to work?

    [​IMG]

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  2. D'tar

    D'tar Friend of Leo's

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    This should work.


    upload_2019-4-17_15-4-33.png
     
  3. D'tar

    D'tar Friend of Leo's

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    Not sure about your 3 terminals there. In one position you want an open circuit. In the other you want a closed circuit. You may have to use your meter to figure out which terminals to use.

    upload_2019-4-17_15-48-32.png
     
  4. corliss1

    corliss1 Friend of Leo's Platinum Supporter

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    And worth noting, reverb is always the shielded wire on these footswitches.
     
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  5. Deeve

    Deeve Friend of Leo's Silver Supporter

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    New information (to me)
    This friendly board is a wonderful thing.
    Thanks.
    Peace - Deeve
     
  6. jsnwhite619

    jsnwhite619 Friend of Leo's

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    Thanks guys...they had this thing all jacked up! We ought to come up with something that works a little better!


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  7. corliss1

    corliss1 Friend of Leo's Platinum Supporter

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    Yup - whenever I get a vintage Fender and the reverb buzzes first thing is to make sure the trem/rev wires are plugged into the right spots because it will still physically work and switch the functions on and off, but have the unshielded wire on the reverb will add noise.
     
  8. schmee

    schmee Poster Extraordinaire

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    It always amazes me Leo used RCA jacks for that on the BF/SF era. It's kind of kluged design. Why not just a stereo jack? Less labor too.
     
  9. jsnwhite619

    jsnwhite619 Friend of Leo's

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    It works! Thanks for the help. It was a generic switch from AmplifiedParts. Judging from the previous wiring and the pictures here - and what turned out to work - the reverb wire with the shield was run to the tremolo switch, the reverb wire was then not shielded, and nothing was grounded to the switch housing. So, swapping the wires, there was barely any shielding wire actually making contact, and adding a ground wire, both switches work with no hum or pop when the switches engage.

    If we could buy exactly what we wanted, we probably wouldn't building our own stuff? ;-)
     
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  10. jsnwhite619

    jsnwhite619 Friend of Leo's

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    I forgot to mention last night, but I didn't think I was ever going to get the rubber cover back on there. Finally, I put a pot of water on the stove, and when it was hot I dropped the cover in for a couple minutes. Got it out, dried it quickly, and it slipped right on with no trouble. So, a tip for anyone with the same problem.

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