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, July 30, 2020

Mad Professor Simble

This is been traced for a few weeks now over on FSB and I've meant to lay it out since then, but just now getting around to it. If you don't know, it's an amp-in-a-box type trying to emulate a Dumble amp. Apparently it sounds very good with smaller amps. Should fit nicely in a 1590B with board mounted pots as per usual.



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20 comments:

  1. bcruzin2August 2, 2020 at 5:28 PM

    Just when I thought I was free...you pulled me back in, mark this one verified, sounds great.

    ReplyDelete
    Replies
    1. AnonymousAugust 8, 2020 at 2:33 PM

      Thanks for verifying! I'll be waiting for parts on this one.

      Delete
  2. UnknownAugust 8, 2020 at 2:00 AM

    Pleace man, Line selector Boss!

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  3. morbido13August 8, 2020 at 5:47 AM

    I can't believe I missed this one.
    Very nice sounding pedal.
    I used an LM833 instead of the TLC2272

    ReplyDelete
  4. Ryohei JPNAugust 10, 2020 at 4:44 AM

    Verified. I like it very much. Thank you for sharing as always.

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  5. constantineaudioNovember 9, 2020 at 11:06 AM

    Best clone pedal I've ever played, Thank you.

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  6. SandorJanuary 9, 2021 at 9:23 PM

    I also made it with LM833. Very good pedal. Somehow similar to a Zendrive. I made it in one box with an Orange Squeezer with external Compression pot. This Simble just loves the squeezer. Seriosly, if you are a strat blues player these two are all what you need.

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  7. UnknownJanuary 15, 2021 at 12:42 PM

    Hello, I'm note sure I'm reading good about 2 values. On the circuit I'm hesitating between 8.2nf and 82 nf for a capa. and between 2.2 M and 22M for a resistor. Can somebody confirm please.

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  8. UnknownJanuary 15, 2021 at 2:37 PM

    Thank you very much for your answer. I'm gonna do it...

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  9. philgJanuary 28, 2021 at 7:09 PM

    Well - I get output - how come it's not overdriving- any suggestions anyone?

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  10. RogueAugust 5, 2021 at 12:58 PM

    Salió andando de una!!!

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  11. UnknownSeptember 20, 2021 at 6:14 PM

    Muy buen aporte!! Muchas gracias, funcionando a la primera!!

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  12. RenegadrianSeptember 29, 2021 at 11:07 AM

    anyone got the schem for the simble booster?!

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  13. UnknownJanuary 3, 2022 at 12:38 PM

    The pedal sounds beautiful but the volume is low. Only near the end of the potentiometer's travel does it exceed the volume of the off pedal. Is it a fault?

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    Replies
    1. zikMay 20, 2022 at 10:32 AM

      The same low level issue here? Any idea about possible reason?

      Delete
    2. Davist10December 30, 2022 at 2:55 PM

      The same low level issue here. On the other hand, the gain is too high, it was far from mad professor's simble. Here was a higain

      Delete
  14. AlejandroMay 29, 2022 at 2:21 PM

    Thanks for sharing all this beautiful information!! Would a tl072 work?

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  15. MassatonyFebruary 17, 2023 at 9:06 PM

    Checked everything and still can't get anything out of the countour pot. Everything else works great.

    ReplyDelete
  16. andyApril 26, 2023 at 12:18 PM

    hello everything is fine? I checked here and I didn't find the dumbloid? did you make a pcb for it?
    https://docs.pedalpcb.com/project/SpecialOD.pdf

    ReplyDelete

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