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.


14 comments:

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

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    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!

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    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.

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    3. (just noticed your comment... sorry)
      Never did fix it using the vero layout. I'm using David's layout here without oscillation. No issues!

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

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    1. Awesome! Much appreciated, David.

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  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!

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  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.

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  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.
    Grazie
    Nicolino Pagano

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    1. Questo non utilizza un interruttore rotativo. Usare un DPDT on-on-on interruttore a levetta.

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  6. Great pedal! Used rotary switch for 4 points, added 15n cap!

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  7. This is verified.. I used a notch filter gyrator instead of the wha inductor,..sounds great!

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    1. hi, just wondering how you implemented a gyrator instead of an inductor. would love to know more.

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  8. Hi, I've done this one a few weeks ago, it works fine ! But the gain pot is working backwards, and didnt give a lot of difference between light gain or fuzz... Is there any solution for this issue ? Thanks

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