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.


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13 comments:

  1. Marcus CorradiniSeptember 2, 2017 at 9:16 PM

    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...

    ReplyDelete
  2. Simurgh666June 30, 2018 at 8:22 AM

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

    ReplyDelete
    Replies
    1. Effects LayoutsJune 30, 2018 at 11:47 AM

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

      Delete
  3. Simurgh666June 30, 2018 at 11:57 AM

    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

    ReplyDelete
    Replies
    1. Simurgh666June 30, 2018 at 12:00 PM

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

      Delete
  4. WawanDecember 8, 2020 at 5:36 AM

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

    ReplyDelete
  5. Nicolini de SemolaMarch 29, 2021 at 12:31 PM

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

    ReplyDelete
    Replies
    1. Effects LayoutsMarch 29, 2021 at 1:26 PM

      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

      Delete
  6. Nicolini de SemolaAugust 16, 2021 at 9:20 PM

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

    ReplyDelete
  7. diyOctober 23, 2023 at 3:39 PM

    Hello!

    I made the effect from your site, exactly it is mxr custom badass 78.

    But I don't understand where you solder the input from the guitar, where the footswitch and where the output. I'm a noob and can't figure it out.
    Can you explain me where to solder?

    With best regards.

    ReplyDelete
  8. GutbucketSeptember 4, 2024 at 1:15 PM

    Wheres the schematic for this sucker ?

    ReplyDelete
    Replies
    1. Effects LayoutsSeptember 4, 2024 at 1:41 PM

      FSB: https://www.freestompboxes.org/viewtopic.php?f=1&t=13121&p=231535#p231535

      Delete

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