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.

Wednesday, May 25, 2016

Fairfield Barbershop - 1590A

Continuing on with my 1590A kick, here's one for the Barbershop Overdrive from Fairfield Circuitry. I've modified a few things: first, the polarity protection of the original is a bit excessive, so that's been simplified. And secondly, I included 2 trimmers to help set the bias of the J201s (you're welcome, Cody). With 3 pots you'll need to use 9mm pots and the 220uF cap is on it side to fit better in the enclosure and hopefully not get in the way of the input jack. Drilling template can be found here.


  1. Very nice. great idea these 1590A pcbs
    Thank you

  2. Just noticed the comment on the trimmers.. lol nice. I hate 201's so much that I will take anything to help bias them. Thanks man.

  3. Hi, I'm wondering if you still have the component layout for your V1 layout. I had the V1 PCB etched a while ago, and I am in the process of populating the board, but noticed that you had replaced the image with a second revision of your layout.

    1. Here you go.

      Note that you'll need to swap the wires for the in/out jacks for V1, but it should work ok.

  4. Replies
    1. Typically adjust to half the supply voltage (so around 4.5v) then adjust to taste with the trimmers.

  5. Verified:

    Sag b10k-> b5k