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.


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15 comments:

  1. johnkMarch 5, 2018 at 10:12 PM

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

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    1. AnonymousMarch 5, 2018 at 11:16 PM

      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!

      Delete
    2. OcularDawnMay 8, 2018 at 12:48 AM

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

      Delete
    3. AnonymousSeptember 2, 2019 at 7:15 PM

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

      Delete
  2. Effects LayoutsMarch 6, 2018 at 1:34 PM

    Thanks for catching that, John. Fixed now.

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    1. AnonymousMarch 7, 2018 at 1:05 PM

      Awesome! Much appreciated, David.

      Delete
  3. AnonymousMay 6, 2018 at 11:49 AM

    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. UnknownJune 8, 2018 at 11:49 AM

    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. UnknownFebruary 13, 2019 at 1:42 AM

    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. AnonymousSeptember 2, 2019 at 7:14 PM

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

      Delete
  6. ZZOYDSeptember 26, 2019 at 2:51 PM

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

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  7. UnknownJune 14, 2020 at 11:45 PM

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

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    1. UnknownAugust 19, 2020 at 9:30 AM

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

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    2. UnknownNovember 17, 2024 at 4:02 AM

      Not him but found this article to be useful: https://sound-au.com/articles/gyrator-filters.htm

      Delete
  8. ArthurJanuary 8, 2021 at 5:51 PM

    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

    ReplyDelete

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