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.

Friday, April 24, 2015

Marshall ShredMaster

Here's another one from Marshall's great pedal line from the early 90s. When it was released it was considered a high gain distortion, though probably wouldn't be categorized as such today. It was made famous by Thom Yorke and Jonny Greenwood from Radiohead and covers more than just shredder territory.




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21 comments:

  1. AnonymousJuly 27, 2015 at 2:28 AM

    works, verified
    lots of noise, i think i must use shielded cable

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  2. UnknownAugust 23, 2015 at 10:45 PM

    this is sample demo https://www.youtube.com/watch?v=LUjgR1zy-i8

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  3. AnonymousApril 2, 2016 at 4:04 PM

    I made the PCB version of this one. I had to reverse legs 1 & 3 on the Level pot to get it to go ccw-quieter/cw louder. My build is hella noisy, too... But I'm thinking once it's in the enclosure with some shielded wiring it should be good.

    Thanks for the drill layout on this one, too! Saves me a lot of time and screw-ups. I'm terrible at Photoshop! ;)

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  4. Vander EffectsOctober 23, 2016 at 5:52 PM

    Hi! I made this pedal and works fine, but here is my question: how can I increase more gain?

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  5. UnknownSeptember 4, 2017 at 4:31 AM

    its not working
    can anyone help me plz ( of course if anything in this website really works ! :) )

    ReplyDelete
  6. Analog PedalsJanuary 7, 2020 at 6:33 PM

    This circuit sounds incredible! Perfect control over eq, break up seems to be pretty much perfect (not too much and not too little). Great design!

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  7. Tommy KerafAugust 19, 2020 at 5:49 AM

    I could'nt get 41k resisotrs .. is it ok to use 39k instead?

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    Replies
    1. Effects LayoutsAugust 19, 2020 at 8:28 AM

      That's probably a typo on my part. Those 2 resistors form the voltage divider, so as long as you use 2 resistors of the same value it will be fine. What's most commonly used is anything between 10k and 100k.

      Delete
    2. Tommy KerafAugust 20, 2020 at 12:36 AM

      Thanks a lot for your explanation ..
      is there a way to increase the treble here?

      Delete
    3. exploMay 20, 2021 at 11:05 AM

      Yes, there is an error in layout - look here - correct schematic. Cut trace right after treble 2 pin (wiper) and solder it to pin 5 of TL072. Cut pin 5 of this TL072 from bias grid. Solder a wire from bias grid to the point where you cut trace after treble pot wiper. Voila - treble is usable. http://www.matsumin.net/diy/jisaku1/shred_m_mini/shred_Schematic_phnompenh.gif

      Delete
  8. exploMay 20, 2021 at 11:11 AM

    Hello, there is an error in layout - look here - correct schematic. Cut trace right after treble 2 pin (wiper) and solder it to pin 5 of TL072. Cut pin 5 of this TL072 from bias grid. Solder a wire from bias grid to the point where you cut trace after treble pot wiper. Voila - treble is usable. http://www.matsumin.net/diy/jisaku1/shred_m_mini/shred_Schematic_phnompenh.gif <-correct schematic

    http://www.klimaco.net/MUSIC_RND_PIX/a_msm.gif <- wrong schematic, look carefully just after treble pot.

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    Replies
    1. JRG770December 31, 2021 at 1:54 PM

      Yes you are correct Thank You

      Delete
    2. JRG770December 31, 2021 at 1:57 PM

      But also in the the original the r10 3k3 should go to ground but in this layout it id going to vref. It makes a difference if you test and compare on breadboard.

      Delete
  9. sam2372May 22, 2021 at 8:16 AM

    Hello, just to be sure i edited original layout with your instructions, did you mean it like this? My edit of original layout -> https://ibb.co/X2Mgvt3
    Thanks for answer!

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    Replies
    1. exploMay 23, 2021 at 3:06 PM

      I've done it with my one and it works perfectly. It's quick job - try it and hear it by Yourself ;)

      Delete
    2. exploMay 23, 2021 at 3:08 PM

      Yes, it is extactly according to correct schematic. I've talked to friends of mine that builds pedal clones for living and that is 100% same as original.

      Delete
    3. sam2372May 24, 2021 at 4:19 AM

      Amazing! I'm going to build this one, so your comment was really helpful, thank you :)

      Delete
  10. Fiqri AdrilezOctober 7, 2021 at 6:48 AM

    Thanks bro, my pedal is so rich treble. does anyone know the mod to add pot middle? maybe if ad would be perfect.

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    Replies
    1. JRG770December 31, 2021 at 1:59 PM

      Did you solve this problem ? Usually this pedal is too dark and some people change )at least) the c3 in cap to 100p, or 300 p etc... for more treble

      Delete

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