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.




20 comments:

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

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

    ReplyDelete
  3. 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! ;)

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

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

    ReplyDelete
  6. 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!

    ReplyDelete
  7. Is the PCB layout already updated verified? it seems so many input and comments before ...

    ReplyDelete
    Replies
    1. sorry .. I mean Ultra Flanger .. please delete this comment

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

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

      Delete
    3. 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
  9. 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.

    ReplyDelete
  10. 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!

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

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

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

    ReplyDelete