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.

Monday, June 29, 2015

Run Off Groove May Queen

Here's another "Brian May in a box" circuits, this time from Run Off Groove. The May Queen is a treble booster/overdrive that should get you pretty close to those classic Queen tones. The cap between 9v and the drain of Q3 in the layout below is optional. It's a high end filter, so the larger the values will cut more treble frequencies (2.2n is just a good starting point–adjust to taste). I've added polarity protection, power filtering, and a pull down resistor at the input. You might be able to cram it into a 1590a. For the schematic, transistor voltages, and sound samples, check out RunOffGroove.com.


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7 comments:

  1. UnknownAugust 26, 2015 at 3:35 AM

    I built one of these a while ago using the ROF perfboard layout. They are bloody brutal. Great solo hi-gain Vox sorta tone. Difficult to get to do anything else though! Fun build :)

    ReplyDelete
  2. AnonymousOctober 4, 2016 at 6:11 PM

    hey dude, this sound awesome but i have a question... exactly what function does the trimmer? and if i use a potentiometer instead of it, can i have more control of the effect? like a tone or gain control?

    ReplyDelete
    Replies
    1. Effects LayoutsOctober 5, 2016 at 7:39 AM

      The trimmer biases the JFET. It won't be very useful as an external control.

      Delete
    2. AnonymousOctober 5, 2016 at 1:20 PM

      thanks for the info man

      Delete
  3. guitarFebruary 20, 2017 at 6:14 PM

    How can I add a gain control ?

    ReplyDelete
  4. shimanekoNovember 5, 2020 at 7:54 AM

    Good day! This layout is verified.

    ReplyDelete

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