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, August 23, 2019

Prescription Electronics Clean Octave Blend

Got a request for this one for Fuzz Friday. Originals fetch crazy prices online. It's an octave fuzz with a clean blend. If you want a fabricated version of this, check out the Corn Cobb on the store.. Schematic over on FSB. Should squeeze nicely in a 1590B.



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5 comments:

  1. Tim MikhailouskiAugust 23, 2019 at 9:47 AM

    Please check if Blend knob is connected properly

    ReplyDelete
    Replies
    1. Effects LayoutsAugust 23, 2019 at 11:05 AM

      It follows the lug numbering of the traced schematic.

      Delete
  2. NickOctober 1, 2019 at 6:20 AM

    It works. But Octave pot works weird. It regulates well just in last 30% of turn but also makes the sound louder. perhaps should experiment with values and type of the pot.

    ReplyDelete
  3. layout of from japanMarch 13, 2022 at 7:06 PM

    Nice to meet you from Japan
    My name is murowani and I'm DIY effector.
    Prescription Electronics Experience
    I want the layout of. Not anywhere.
    https://www.youtube.com/watch?v=v5CKowpzu8I

    ReplyDelete
  4. Mark HammerApril 11, 2022 at 10:07 PM

    1) The Octave pot should be reverse log ("C" taper) to provide a smooth change in intensity as you rotate clockwise.

    2) The two 1N4001 diodes should be fairly close in forward voltage for best octaving. Let's say within 10-20mv of each other.

    3) A secondary non-octave mode can be obtained by cutting the trace connecting the 1N4001 diode that takes its feed from the emitter of Q4. That nice long trace allows for drilling a small hole on each side of the cut, to connect wires to a toggle or footswitch. Both the Foxx TOne Machine and Fulltone Ultimate Octave select between octave and regular at-pitch fuzz by connecting and disconnecting that diode. That's all their respective "Octave" footswitches do. And it can be done with the COB as well. I did it to mine and it's worth doing.

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