Tuesday 16 April 2024

OKKO Holy Grit

 Schematic is avaiable HERE.



11 comments:

  1. Cool! I used to own this and it was a great do-it-all dirt box. Clean boost to almost fuzz.

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  2. Nice!
    I like the eq design, with the bass being pre-dirt and the treble being post-dirt.
    Thank you for the layout!

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  3. By the way, couldn't the 3 trimmers and the switch be replaced by a single 20K potentiometer?

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    1. I guess you can but I'm not sure how useful it will be since the switches toggles between three bias settings.

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  4. Tag it! Works just like the original.

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    1. Just in case anybody wonders, yes, the treble control is very subtle on the original pedal too.

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    2. The 2N3053 isn't really essential either. I just tried with some mil spec 107's at 270 and 289 hfe and it's actually a lot better. still goes from clean to fuzz, but with a lot more presence.

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    3. Thanks Ben for the verification and report!

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  5. Hi. How do you recommend setting the three trimmers to get as close to the original as possible?

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    1. Hi there, If you click on the schematic link above there’s a small section that gives you the values and how to set them. Cheers, Ben.

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