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Monday, 12 January 2015

MXR Distortion III

Being so similar to Wylde Signature and GT-OD, i can understand why this one was still missing from the library. Well. Up the 100n to 220n-1µ from inverting input of the driver amp to VRef and swap the clippers for LEDs. Should be worth your while...



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39 comments:

  1. Travis12 January 2015 at 17:45

    Hah I have one of these floating around in my studio. It's not very good but it could be modded to sound better. As it is it's a bit thin and fizzy

    ReplyDelete
  2. Hozy3112 January 2015 at 18:47

    Nice one. May have to give this one a go. Thanks guys for this website and all the work you do. I am relatively new to pedal building but must say i have truly found my passion/obsession.

    ReplyDelete
  3. ξεναγός νεκρόπολης14 January 2015 at 01:14

    tag it Miro!
    verified!
    i didn't have any 1.8m resistors, so i've used 1.5m.
    all pots working as they should.
    my mates are planing an iron maiden tribute band(lol!), and i wanted to build a distortion+ cause i've read that that was what they had in their first steps!...so when i saw that today i said why not??lets see if my friend likes that!!
    thanks man!

    ReplyDelete
  4. Travis14 January 2015 at 01:31

    This is really different to the Distortion +

    You should build them both to check it out
    http://3.bp.blogspot.com/_y7gcfRKQFgA/TDb740PvQNI/AAAAAAAAAL0/-uvn7bPmzr0/s1600/MXR+Distortion+%2B.png

    ReplyDelete
    Replies
    1. ξεναγός νεκρόπολης14 January 2015 at 01:52

      yes man....i know...i've build that with mods, months ago but i've burned it somehow!!!the first and only circuit that i've burned(don't know how!). i think i'll rebuild it!thanks!

      Delete
    2. mirosol14 January 2015 at 21:54

      ...you should try DOD 250 instead.
      +m

      Delete
  5. ξεναγός νεκρόπολης17 January 2015 at 12:42

    hi miro!
    is that dod250 close to what i'm looking for?i thought that it was an overdrive.my friend is looking for a distortion with lots of treble.
    this one (mxr distIII) is great but not much like maiden...
    but the more i play with it the more i love it so i'll keep it for myself!!
    i think i should build dod and the old mxr for my friend to taste and then box the best one.

    anyway..
    finally the working voltages

    supply 9,00v
    ic
    1. 4,36
    2. 6,2
    3. 2,9
    4. 0
    5. 4,2
    6. 4,37
    7. 4,38
    8. 8,7

    mpsa14
    e. 3,66
    b. 2,52
    c. 8,72

    (i don't remember how the pots where set so pin2 might look a bit hi. or am i wrong?)

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    Replies
    1. PHYCO PEDAL MANIAC23 June 2022 at 15:40

      Hello first time here i have build the schematic the voltages are similar to yours but i have no voltage on emmiter and base. I have checked all connections, but the outputt isnt what it should be

      Delete
  6. Unknown9 March 2015 at 09:50

    Hi everybody,
    coul'd i replace the MPS A14 for a MPS A13 ?

    franck

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  7. Unknown11 March 2015 at 22:27

    Should be no problem.

    ReplyDelete
    Replies
    1. Unknown6 April 2015 at 15:39

      hi sorry i haven't seen your replie...
      Thx I try ! i'll tell you !

      Franck

      Delete
  8. Juan Manuel Vidal18 March 2015 at 17:58

    Good day, I don´t wamt to sound grumpy, but when gonna post new projects? I like to see more.

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    Replies
    1. IvIark18 March 2015 at 18:50

      I'm on a bit of a sabbatical at the moment and having a break from it. I will be back before long but at the moment don't have much energy for it, and have got too many time consuming things taking up my time with my normal life.

      I will definitely be back though, but don't want to put an estimate on when at this time. There should be plenty of projects to keep you busy in the meantime though, and I will be joining in the conversations and troubleshooting when I can.

      Delete
    2. Juan Manuel Vidal19 March 2015 at 16:01

      Thanks for the reply. I hope to see more projects in no long, and also hope you enjoy the personal time and finish with success your things.

      Saludos from Mexico.

      Delete
  9. Unknown4 April 2015 at 16:41

    Hi
    when you say outpout 2 to output you mean the output 2 pot is the output of the pc board ?

    Franck

    ReplyDelete
  10. Travis4 April 2015 at 17:14

    Lug 2 of the output aka volume pot is connected to the effect output lug of your bypass switch. This is the same on almost every circuit you'll build on here

    ReplyDelete
  11. Travis4 April 2015 at 17:15

    Definitely take a look at the offboard wiring tab on this site to answer all of your basic wiring questions

    ReplyDelete
  12. Unknown4 April 2015 at 22:14

    I'm sorry but its not always clear for a newbies like me…
    I' like the idea that my work will work at the first time ! before do a wrong think i ask ! :)

    Franck

    ReplyDelete
  13. Unknown4 April 2015 at 22:35

    seriously I know nothing about electronics, may be just what is a resistor or a transistor or capacitor, but I've done a lot of pedals just the first problem asked me ... if you want to see, I'm on a stupid project, which was to fiare fair housing with materials recovery :) ... I'm printer, signmakers so I can tinker full of stuff ! I've used Dibond & plexi glass 3 mm…
    here is the link :
    https://imageshack.com/a/6NXz/1

    ReplyDelete
  14. Travis5 April 2015 at 08:19

    Very cool. Any plans to print graphics on it?

    ReplyDelete
    Replies
    1. Zach5 April 2015 at 08:23

      thats really fucking cool man.

      Delete
    2. Unknown12 April 2015 at 01:02

      The project if finish ! Everything work really good…
      by the left :
      -Javaboost
      -Tremolovox
      -Phase 90 MXR
      -Disto MXR III (realy cool)
      le liens
      https://imageshack.com/a/6NXz/1

      The effects are all very good quality !
      the next box at the next month…
      Chorus, compressor, tremolo, disto, flanger… :)
      See you laters guy,

      Franck

      Delete
    3. Unknown6 June 2016 at 05:56

      Hi frank, did work with the MPS A14?

      Delete
  15. Unknown5 April 2015 at 08:34

    Yes i have ! it"s a prototype and i do it without graphic, but when every things will be ok
    I" will print them…

    Franck

    ReplyDelete
  16. Unknown6 April 2015 at 15:47

    Hi,
    is anybody try the JRC 4558 in replace to 33178 P ?
    Ordered it but... It's coming along... i wait it since 4 weeks and i'n not to receive it in 2 weeks... :(
    If somebody know about the really difference, please tell me...

    Franck

    ReplyDelete
    Replies
    1. Unknown10 April 2015 at 10:52

      HI,
      i've tried JRC 4558 at replace to the 33178 P
      It's work ! look work good, but i don't know the really sound difference…

      franck

      Delete
    2. Unknown11 April 2015 at 22:26

      Ok les Gars !!!
      I watched the datashit the shema of 2646 , but I I've read backwards so the 've mounted the 2n2646 at reverse… Now it' good

      Franck

      Delete
  17. RockyT8 May 2015 at 04:05

    Anyone have gut shots of this build? Id really appreciate it, im not getting any sound out of my pedal.

    ReplyDelete
    Replies
    1. Unknown21 June 2015 at 12:21

      explain me other time please i don't understand what yeoman !

      Delete
  18. BigZed21 November 2015 at 19:38

    Hi Guys,
    Will this work with a bass guitar?

    ReplyDelete
    Replies
    1. Zach21 November 2015 at 23:15

      no reason why not. you may need to do some tweaking to allow more bass frequencies to come in to make it more bass friendly.

      Delete
  19. Unknown14 October 2016 at 12:43

    This comment has been removed by the author.

    ReplyDelete
  20. Unknown14 October 2016 at 12:48

    Hello everybody,
    Can I replace MC33178p with MC33078N? Cannot find an MC33178p...
    My other options would be an JRC4558 and a TL072CN.
    What would you guys suggest?

    ReplyDelete
    Replies
    1. Rathma2412 February 2021 at 22:07

      Yes, you can use TL072CP or maybe OPA2134A. I just built this, sounds cool, but a little bit thin sound for me. I'll modify a little later.
      I used some parts with not exactly thesame values as on the picture.

      Delete
  21. Unknown19 January 2017 at 08:33

    Hi everyone,

    any idea how to connect an indicator LED?

    ReplyDelete
    Replies
    1. Unknown19 January 2017 at 10:29

      http://1.bp.blogspot.com/-k5Sh68yVU18/TzGRFKbiALI/AAAAAAAAAlk/CbfaaduUjYQ/s1600/%21Offboard+wiring.png

      Delete
  22. supermario28 February 2017 at 15:45

    Just made it. Couldn't find MPSA14, so MPSA13 was used, IC is 4558.
    After turning on there is very loud and continous squeeeeeak, and guitar sounds like from fuzz.
    Any ideas?
    Thanks.

    ReplyDelete
  23. PHYCO PEDAL MANIAC23 June 2022 at 15:43

    Hello first time here i have build the schematic the voltages are similar to yours but i have no voltage on emmiter and base. I have checked all connections, but the outputt isnt what it should be

    ReplyDelete