Oscar's Bearded Fuzz Mojo version

[heuermh]

Just wanted to pull this into a separate thread from here

http://guitar-fx-layouts.42897.x6.nabble.com/Just-can-t-figure-it-out-td28753.html

Schematic


Layout


Breadboard version of vero layout



I wasn't impressed with MPSA18 or any of the usual Si transistors so I went through my box of random reclaimed stuff and found one that fit like a glove, but I can't identify it.

It's metal can and has "ITT 449 417-154", I'm guessing it is a Zenith?  Hfe of 93.  Other transistors around Hfe 100 sound pretty good.

[Travis]

ITT is a semiconductor manufacturer. I have no clue about the part number though sorry!

[notnews]

wow, this is the lowest parts-count fuzz I've ever seen. how does this thing sound?

I know a transistor's sound depends a lot on the circuit surrounding it, but in a way this circuit is a good way to test how different transistors sound intrinsically.

Cool work... and really cool mojo caps.

[Travis]

It's a Bazz Fuss with a gain pot. Most of the clipping is going to come from the diode. In my opinion you should test transistors in the circuit you plan on actually using them in

[heuermh]

Travis wrote

Most of the clipping is going to come from the diode.

Oh great, I need to go through my pile of random diodes too?  :)

Thanks for the layout!

[heuermh]

Here's my version on vero and boxed up.

I cut the board to fit the caps, added a giant resistor to match, and adjusted the layout.