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, June 28, 2019

Allies Fuzz

Got a request for this one for Fuzz Friday. Designed by Masaru Kubota it's based on Roger Mayer's Axis Fuzz with a fair bit of tweaks. Here's the schematic for reference.

 I revamped Roger Mayer's Axis Fuzz and stuck on a phase stage to make the circuit sound like a tube amp.  You probably notice the Dallas-Arbiter Fuzz Face biasing configuration.  You can use a regular low-pass RC network, ala the ProCo Rat, to make the circuit sound like a "open" tube amp.  This fuzz sounds ALOT like the "Modern Lead" amp model on my Zoom GM-200.  You'll be surprised at how much this circuit sounds like a tube amp.


10 comments:

  1. Hi! What about hfe of both transistors:it have to be equal or differ must be?

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    1. I don't think you have to match them, especially since one is NPN and the other is PNP.

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  2. is not in the image transfer library?

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    1. Sorry about that. It's in the Misc. folder now

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  3. Verified. Sound amazing. 1N34 instead 5817. Thank you.

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    1. That diode is for power polarity protection and won't affect the tone at all. A germanium isn't great for that. Swap it for a 4001 or similar rectifier diode if you don't have any schotky diodes available.

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  4. I wasn't sure what kind of diode I got and put this on. Usually 4001 or similar is my choice. Thanks again for your work

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  5. Nice Fuzz. I used Q1 2n2222,Q2 2n3906, Good soud & gain. Tried Q2 Ge PNP Hfe from 35 to 90 (hfe without difference), good sound. Tried Q1 & Q2 Ge, very good, but i took pot on in to decrease gain!So, thanks, David!

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