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.

Monday, February 13, 2017

Electro Harmonix Soul Preacher

There have been a few different iterations of the Soul Preacher. This one follows the version that isn't based around an OTA chip (much like a DynaComp), but is rather much closer to an Orange Squeezer. The original used a buffered bypass, and I've included an extra pad for the buffer out if you want to build it that way. Here's the schematic for reference.

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19 comments:

  1. UnknownFebruary 14, 2017 at 9:20 AM

    what would i need to change to make it work ok with bass guitar?

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    Replies
    1. Effects LayoutsFebruary 14, 2017 at 10:47 AM

      It may work fine as is. But if not, probably some capacitor values. You'd have to experiment.

      Delete
  2. Michael GalanFebruary 14, 2017 at 7:22 PM

    would i need to jumper the pads for buffer if i elect not to use a buffer?

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  3. BerkicauFebruary 15, 2017 at 3:46 AM

    I bet that germanium can't be replaced, am I right?

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  4. danAugust 23, 2017 at 1:16 AM

    is verified???

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  5. DiegottoMay 27, 2019 at 11:22 PM

    My build has too much clipping, what could it be?

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  6. IvanJanuary 31, 2020 at 6:17 AM

    esta es la replica del soul food ? necesito ese eecto .sonaria genial.

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    Replies
    1. Effects LayoutsJanuary 31, 2020 at 12:15 PM


      No, the Soul Food is a Klon copy. This is a compressor

      Delete
  7. Dave25February 7, 2020 at 5:32 PM

    I'm confused about the out and buffered out how do you use these two together?

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    Replies
    1. Effects LayoutsFebruary 8, 2020 at 1:26 PM

      To use the buffered out you'd use a DPDT footswitch. Wire the In pad to the input jack, the Out pad to lug 1 of the footswitch, lug 2 to the output jack, and lug 3 to the Buffered Out pad. Then use the other side of the footswitch for LED on/off indication. The input buffer of the circuit will always be in the signal path, with the compressor portion bypassed by the footswitch.

      Delete
  8. Ricco SeixasFebruary 21, 2021 at 6:23 PM

    Verified!!! I did the pcb version and it works well, it looks very good with ne5532. thanks, your work with the layouts is amazing !!!

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  9. Jun dJune 7, 2021 at 4:59 AM

    Ready to build this one this week!

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  10. Zaraki1337December 7, 2021 at 12:19 AM

    Lol

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  11. Zaraki1337December 8, 2021 at 3:54 AM

    has anyone tried with 4148 instead of 1n34a?

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  12. nediamDecember 12, 2021 at 4:34 PM

    There is a lot of clipping. Does anyone has that problem?

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