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.

Tuesday, April 7, 2015

Marshall Guv'nor

The Marshall Guv'nor is one of the more highly regarded overdrive/distortion pedals of the late 80s, early 90s. With it's amp-like dynamics and a wide range of versatile tones, the Mk. I version of this pedal is still highly sought after. Many artists have used it, though Gary Moore is most associated with it, thanks to his "Still Got the Blues" album. 

You can use right angle PCB pots, mounted from the solder-side of the board if you like. It should fit nicely in a 1590B.


at
Labels: , ,

16 comments:

  1. Septriadi ErfansyahApril 28, 2015 at 1:18 PM

    verified sir, jus worng pot gain 3,, must 3 to 1.. heee

    ReplyDelete
  2. dtgehringApril 28, 2015 at 4:00 PM

    Thanks for the verify! I've updated the layout to swap the gain pot so it will work with right angle PCB pots.

    ReplyDelete
  3. Septriadi ErfansyahApril 28, 2015 at 11:46 PM

    i have one request sir, you can make layout wampler euphoria/ectasy sir. I send in tab *request a layout not work

    ReplyDelete
  4. UnknownAugust 23, 2015 at 10:43 PM

    see sample demo on https://www.youtube.com/watch?v=9_NwmkolDfo

    ReplyDelete
  5. AnonymousApril 15, 2017 at 11:46 AM

    I have two questions about this circuit. I built this and everything is working, but it seems to significantly cut the output volume. Is there any way of correcting this? Also, there is no significant increase in the gain until I turn the gain pot to about 3/4 and then from there to all the way up it increases to a medium high gain. Is that the way this circuit is supposed to work?

    ReplyDelete
    Replies
    1. Effects LayoutsApril 27, 2017 at 9:49 AM

      Most of these older Marshall effects aren't all that loud. You might want to replace the Gain pot with a log taper 100k.

      Delete
    2. UnknownJune 7, 2017 at 7:58 PM

      I'm having the exact same issues as you Rick (gain and output volume). We may have buggered something on the board. I have an original Guv'nor and it's output is far louder. I'll see if I can find out what it is.

      Delete
  6. Ian H NelsonAugust 7, 2017 at 4:00 PM

    Should the cap coming off lug 1 of Treble pot be 68nf? Looks that way in the schematic I have.

    ReplyDelete
  7. EdoAugust 16, 2017 at 3:07 PM

    The 2.2K should go to lug 1 gain pot, not lug 3

    ReplyDelete
  8. Star Dust - Hand Made PedalsNovember 20, 2017 at 11:56 PM

    this layout is wrong in the gain section

    ReplyDelete
  9. Arnold DikstaalFebruary 12, 2018 at 5:46 AM

    and also the level/volume is incorrect. The 470p is placed after the 22k to out. In the gain section the 2k2 and 100n should be on pin 1 not 3.

    ReplyDelete
  10. Arnold DikstaalFebruary 12, 2018 at 6:31 AM

    And the 6n8 on pin 1 of treble should be 68n

    ReplyDelete
  11. tertiumsquidFebruary 6, 2020 at 4:40 AM

    Can confirm, if you want this pedal to actually sound like a Guv'nor, you've gotta swap the 6.8nf cap to 68nf and move the 2.2k from the gain pot lug 3 to lug 1 - I drilled an extra hole in the trace directly left of the 2.2k to do that. Once that's done, it sound monstrous.

    ReplyDelete
    Replies
    1. Taciano CanassaApril 1, 2020 at 12:22 AM

      Your right! i just look the factory schematic from frestomboxes. This pedal deserves a rework. Best marshall tones ever made!

      Delete
  12. PampaApril 14, 2021 at 4:19 PM

    This comment has been removed by the author.

    ReplyDelete

Subscribe to: Post Comments (Atom)