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, January 29, 2016

Dunlop JH-F1 Jimi Hendrix Fuzz Face

Happy #FuzzFriday! Got a request for this one. It's the classic silicon Fuzz Face circuit with a few added components.


  1. Replies
    1. The 47µF cap is the power filter. Replacing it with a lower cap shouldn't change the sound of the effect.

  2. VR50K and VR 10K
    How to adjust?

  3. Use 2n3904 para q1 y 2n2222 para q2. Lo importante es el hfe y medir los voltajes para los transistores... Suena lindo

  4. Hi, im trying to put together my first one. So, I've a couple of questions:

    1.The output comes from the Volume Pot #2?
    2.How to bias? and/or at what value each transistor should be?

    Thank you in advance!

    1. Yes, output from Vol 2. You'll need to measure the voltage on the collector of each transistor with a multimeter. Adjust the trim pots till you get the voltage listed in the layout above.

    2. Thank you for answer so fast!
      Some more precisions:
      1. should I measure voltaage from colletor with one multimeter needle and the other one on the emiter? or on ground?
      2. Its listed "Q1,2 B108-260 hFE for both"
      So, how much its 260 hFE in Volts.?

    3. One on the collector, one on ground.

      A lot of digital multimeters have sockets for measuring hFE, though there are other ways of doing it. Best to google it ;)

    4. OK thank you. Seems that his hobbie means to keep learning new things all the time. Cheers.
      : )

    5. Verified! It's working. After some tests its working fine. Thanks.

  5. Hi guys... Im building this as my first project...but I'm not able to find 3.16k and 82.5 resistor... can I use another with similar values?