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, July 7, 2017

Höfner Buzz Tone

Pretty unique fuzz box from Höfner for Fuzz Friday. Pretty straight forward 3-transistor design that should make for a pretty easy build. Board mounted pots for less off-board wiring and if you want a bit more gain, replace the 47uF input cap on the left side of the board with a 22uF cap. Here's the schematic for reference.


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7 comments:

  1. Rocky DeeJanuary 29, 2018 at 6:31 AM

    Thanks for the layout.

    I see no one has commented yet. Not much interest for this circuit in general I think.

    Here's my take. There is a serious lack of gain, even with the alteration of the input cap. It pretty much makes it unusable for anything other than light fuzz, if that. My depth control tends to cut the signal completely at the extremes of the pots throw (As in no sound all the way right, and no sound all the way left. Most gain in the center. I have no idea why that is.

    I swapped out the 22K input resistor for 1K to increase gain. I also changed Q1 and Q2 with 2N5089's and man! What a different beast!

    I also placed a 10K resistor instead of the depth pot and placed a 10K pot at the front of the circuit as an input gain control. And what a difference. It is now a great fuzz. Thick, creamy and very authentic sounding.

    Thanks again.

    ReplyDelete
    Replies
    1. Sidahmed BkhFebruary 13, 2018 at 10:57 AM

      Hi Rocky Dee, I'm trying to build this little one and I was trying to understand how did you place the 5k1 resistor instead of depth (I mean where do i have to solder this resistor on the board), same thing for the 100k gain control pot, I didnt understand how to do that :)

      Thanks

      Delete
  2. Rocky DeeJanuary 29, 2018 at 10:05 AM

    Sorry, slight correction to the above. got better results from whats below.

    5k1 resistor instead of the depth pot and a 100K pot on the input.

    ReplyDelete
    Replies
    1. Effects LayoutsJanuary 29, 2018 at 11:03 AM

      Thank's for the build report, Rocky! Lots of good info.

      Delete
  3. Max PietriniMarch 5, 2019 at 12:26 PM

    Verified. 22k pot for depth. Sound amazing.

    ReplyDelete
  4. ZZOYDJuly 27, 2020 at 12:42 PM

    i built it with pnp germanium MP39, Hfe 120-130, used this scheme: https://imgur.com/a/SjuM1U3
    working realy tru amazing. Use Sag 2kom to get 3V

    ReplyDelete
  5. ZZOYDJuly 31, 2020 at 5:04 PM

    I used negative earth & 2 kom Sag, which connected to +. So i get 3,6,9 volts.djnt forget to add electrolitic cap before 22 k on in. Its all for germanium Selmer Buzz tone, Early Floyds.

    ReplyDelete

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