Saturday 19 January 2013
Last one from Masaru Kubota's schematics: This fuzz kicks ass. 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. The only thing "missing" is the desirable, fine-grain, underlying sheen, but who notices at a really loud rock show? The response feels really good. It even sounds really good with my horrible-sounding silverface CBS Fender Bassman (complete with aluminum trim and a mis-matched Fender cabinet loaded with P.A. speakers with whizzer cones). I hereby dedicate this schematic to not my father, my father was one of the Japanese-Americans in the American Internment Camps of World War II, but to Harry Meyer, my mother's first husband, who escaped from East Germany to become a representative of the BRD at the Hague in the Netherlands. For uniformity, all fixed resistors, except for the power supply resistor and of course the potentiometers, can be 100k resistors, to give a smoother response and for easier assembly.
A little thing worth noting; the schematic calls for 500 ohm pot for fuzz. As those are easily available, but no other design uses them, i sticked with 1K and placed 1K resistor in parallel with it. That makes the taper sort of an log, which might not give you the best feel for the control. So, use 1K pot as stated in the layout, or source some 500 ohm pots, use one of those and remove the 1K resistor between 1M and D1.