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, March 23, 2016

Mad Professor Stone Grey Distortion

Here's the Stone Grey Distortion from Mad Professor. It's reminiscent of the Distortion +/OD250 circuit, but with a hex inverter stuck after the opamp. It also uses 2 JFETs in the feedback loop of the opamp for clipping. Original op amp is the TL051, but other single opamps can be used (Tl061, 71, etc). Should be an easy fit in a 1590B. Mind the jumper under the CB4069UBE.



7 comments:

  1. Built this today with a TL071 and 2N3819 and it sounds great. I tired my Jazzmaster on it and my SG. I doubt I have to say it but this thing loves the burst buckers. The SG got some great crunch sounds and with drop D tuning it was instant Soundgarden sound. Outshined!

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  2. cody, have you tried using tl072?

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    Replies
    1. The TL072 won't work in this as it's a dual op amp. This effect uses a single op amp. Other options would include TL061, NE5534, or LF351. A LM741 would also work in a pinch, but probably wouldn't sound as good.

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  3. suhr riot pcb please brother!!!

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  4. do you have a pdf file of this pedal? is it 1590b size? thanks

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    Replies
    1. It's in the Transfer Image Library tab at the top of the page. Yes, it'll fit in a 1590B.

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  5. any substitute components for 2N3819??

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