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, August 9, 2017

MXR Custom Badass '78 Distortion

I've wanted to draw this one up for a while. It's a fantastic clone/variation of the  Boss DS-1 Distortion. I had one for a while and loved it, but ended up selling it to fund some other stuff. But I'm definitely adding this one to the pile. You can sub a TL072 or JRC4558 in place of the TLC2262 if you need to.


10 comments:

  1. It's verified. But I had to replace the 47K resistor with a 100K resistor to avoid unwanted distortion. The signal was too high at the TL072's input. Sorry for my bad english...

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  2. Hello, I built this but I dont get distortion till I max out the pot I checked everything

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    1. You try replacing that pot? Could be faulty or maybe you used the wrong taper.

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  3. I did , changes the B100K , tried 250K, but same result, changed the IC, looked the broken traces, shorts, component orientations, checked solder joings, values but no result, maybe my etching was bad or I missed something

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    Replies
    1. Usual suspect is Mpsa14, I will try others and some Mpsa14 too

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  4. I build it, i use bc 517 transistor for mpsa 14 replace...and to 072 IC...but no sound....please help me

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  5. Hi, qty=3 1uF caps drawn as rectangles are Electrolytic with No Polarity ? thanks,.

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    Replies
    1. Those are non-polarized film caps. I get them from Tayda: https://www.taydaelectronics.com/capacitors/polyester-film-box-type-capacitors/1uf-100v-5-polyester-film-box-type-capacitor.html

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  6. Hi guys, is the numbering order on TONE (1-2-3) correct ? the other pots are on the oposite order. Thanks.

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