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.

Wednesday, May 18, 2016

Run Off Groove Big Daddy/Grace

Here are two great sounding, yet simple circuits from Run Off Groove. The Big Daddy uses a JFET gain stage to push a 386 chip, while the Grace uses a JFET buffer in front of the 386 for added sparkle. Schematics, sound clips, and more info can be found on the ROG site.


13 comments:

  1. As I can send you a message ??

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  2. Bigdaddy is ok. Grace not so much. The 6.8nF capacitor in Grace must be connected to the source, not the drain, according to the schematic.

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  3. Hi!

    Can i use 3.3 cap (50V) instead 2.2?
    Can i use 13k instead 15k resisitor?
    Can i use 4.8M-4.9M instead 4.7M resisitor?

    Its critical for sound?

    Thank you so much and have a good day.

    Sergey,

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  4. I don't understand the difference in sound between Big Daddy and Grace. I never listened them.

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  5. I want to attach a daughter-board BMP Tone Stack or a Hi-cut filter on the Big Daddy. Where do I put In and Out from daughter-board (Toneboard) to the FX PCB? :)

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    Replies
    1. Easiest way is to wire the out of the Big Daddy to the input of the daughterboard.

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  6. Ok thanx, what about out on daughterboard? Would that be the new output to 3pdt ?

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