This is a library of perfboard and single-sided PCB effect layouts for guitar and bass. I'm not an electrical engineer by any stretch of the imagination, just a DIY'er who likes drawing layouts. It is meant for the hobbyist (so commercial use of any of these layout is not allowed without permission) and as a way to give back to the online DIY community.

Thursday, October 12, 2017

Wampler Tweed '57

Here's another (and more complicated) amp emulator, and another great design from Brian Wampler. This one stacks JFET stages much like the Cranked AC. It emulates a dirty Fender tube amp with a 3-band tone stack. I added trimmers so it's easier to bias the JFETs and it's laid out for board mounted pots in a 125B enclosure.


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26 comments:

  1. UnknownOctober 12, 2017 at 10:09 AM

    Great!! Please the black 65!!! Excellent Work!!!

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  2. UnknownOctober 12, 2017 at 10:15 AM

    dude! please, make a sea machine layout! (it's the mad bean's gravity wave!) :D

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    Replies
    1. Effects LayoutsOctober 12, 2017 at 10:17 AM

      What's wrong with building Bean's layout? He's got some awesome etchable layouts. Built a few myself.

      Delete
    2. Ian H NelsonOctober 12, 2017 at 3:56 PM

      There's a stripboard layout on http://tagboardeffects.blogspot.com/ if you don't want to etch a board.

      Delete
    3. UnknownOctober 13, 2017 at 11:24 AM

      nothing really, i would love to see your take on the sea machine :D you make great layouts

      Delete
  3. UnknownOctober 12, 2017 at 6:56 PM

    Can't you just build the madbean layout on perf instead of a pcb?

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    Replies
    1. Ian H NelsonOctober 16, 2017 at 8:31 PM

      Not really, the traces on the Madbean pcb are a lot smaller than perf hole spacing, so if you just transferred directly to perf, it wouldn't even fit in a 1590BB. The stripboard layout I posted above is reasonably sized, just do that one.

      Delete
  4. UnknownOctober 16, 2017 at 5:43 PM

    Man I wish the J201s wouldn't cost an arm and an leg, this seems like a fun build.

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  5. UnknownOctober 20, 2017 at 5:13 AM

    If you go the smd route you can get them at Tayda for 17 cents a piece. (I think). You have to get adaptors though. You can get them from OSH park if you don't want to etch them yourself. They are better and cheaper than the adaptors you can get on evilbay ��

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  6. UnknownOctober 22, 2017 at 12:38 AM

    Mark it....just finished...Fired it up and it worked first go. I'm surprised considering how hung over I am. I built it on perf.

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  7. SenorChuyOctober 27, 2017 at 4:05 PM

    Which smd is used in place of the j201 and will the results be the same?

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    Replies
    1. Effects LayoutsOctober 30, 2017 at 9:35 AM

      MMBFJ201 is the SMD equivalent. Results will be the same as through hole J201s (possibly better considering the inconsistency of through hole J201s available).

      Delete
  8. UnknownJanuary 8, 2018 at 8:38 AM

    i cant find 1uf non polar, can be subtitute with 1uf elco? thanks

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    Replies
    1. Effects LayoutsJanuary 8, 2018 at 10:49 AM

      You should be able to. For the 1uF directly above Q6 the positive side should connect to the trimmer next to it, and for the 1uF to the right of Q6, the positive side should connect to the middle pin of Q6 (the source).

      Delete
    2. UnknownJanuary 9, 2018 at 12:55 AM

      Aw thank you so much

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    3. UnknownJanuary 10, 2018 at 1:28 PM

      finally i can find the caps. doesnt works with elcos. works fine. beautiful overdrive. thanks

      Delete
  9. cacopandaMay 4, 2018 at 9:59 AM

    Can I use this as a preamp?

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  10. Edgar CruzJune 24, 2018 at 1:13 AM

    I have built this pedal and I have been impressed with its sound! I want to congratulate you for the excellent work done! Regards!!

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  11. John GovanAugust 15, 2018 at 1:54 AM

    My problem is 2N5457 sounds much louder than my J201. I'm confused why because according to the forum, j201 have much more gain.

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  12. Pabloc82November 20, 2018 at 8:41 AM


    Hi, I wanted to know if it's really verified? I am going to use smd MMBF5457 to replace the j201, my question is if it is correct that the Q6 will get the 9v directly as a fi gure in the schematic?

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  13. UnknownNovember 4, 2019 at 3:50 PM

    How connect the pin to the switch select?

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  14. BILFebruary 8, 2021 at 8:46 PM

    Hello everybody!
    I tried making tweed '57.

    In conclusion, it didn't work.
    Only when you play strongly the guitar, noise is a little out state.

    Can you find the cause by measuring the voltage of the FET?
    regards best.

    ReplyDelete
  15. Seba CacciaApril 28, 2021 at 11:14 PM

    How do you set your trimpots? How do you calculate de voltaje passing which one and what is the setup correctly for this pedal? I have done a couple of pedals and this works just perfectly but I don't know so much about electronics, so I don't know how to set up this trimpots... Should someone teach me? I'm from Argentina.

    ReplyDelete
  16. OktriJuly 10, 2023 at 8:39 AM

    For the sw or switch, it use toggle switch on-on with 6 pin?

    ReplyDelete

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