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, March 2, 2018

Jext Telez White Pedal

Here's a pretty cool one for Fuzz Friday–the Jext Telez White Pedal. It's a recreation of an onboard overdrive unit in a vintage Vox amp used by George Harrison in the late 60s. Schematic can be found here. Pots are board mounted and I've tweaked the Yoko switch to just be a toggle instead of a rotary like the originals, and it should fit nicely in a 125B.


  1. verified, with the exception of the gain pot working backwards.

    1. Thanks John! I did the Tagboardeffects vero layout on this one, but ran into some oscillation issues in the upper end of the gain knob that I've not sorted out. I was hoping to see this layout work so that I could have another go at it. It's an awesome sounding pedal!

    2. Hi Wad, I'm looking to build this. A few people have encountered the oscillation problem. How did you manage to sort it? Thanks.

  2. Thanks for catching that, John. Fixed now.

  3. After build gain pot did not work. Problem was in lane that connected resistor 18К to ground. I downloaded schematic on first day after publication :) Now picture is right.

    Effect works perfectly, very cool pedal. I used Dunlop inductor with a green dot. Thanks for this and sorry for my english!

  4. Thanks for sharing! Does orientation of the inductor matter? I picked up the same Dunlop one a few others here got as well. But never used an inductor before so not sure if it's orientation sensitive.

  5. Vorrei costruire il pedale, non ho capito i collegamenti dell'interruttore rotativo, dove posso trovare uno schema dei collegamenti esterni?
    Si può usare un induttore fasel al posto del Dunlop.
    Nicolino Pagano