This was originally placed here when it actually belongs in the Boutique Stompboxes dissected... section. This is NOT n original circuit :oops:

It has been moved to here:

MXR DISTORTION+ SCRIPT LOGO 1973

UNIVOX SUPER FUZZ

Univox SUPER-FUZZ_front.jpg

Univox SUPER-FUZZ-guts.jpg

Univox SUPER-FUZZ-knobs.jpg

univox_superfuzz_schematic.gif

univox_sf_layout.gif

Redrawn version in Eagle

SUPER FUZZ_layout.pdf

SUPER FUZZ_etch.pdf

Last year, I received an old Kasha Guitar OD pedal in for repair. It was gooped and zero hints of a schematic available on the web and no response from Kasha communiques. So I meticulously removed the goop and traced it. I was quite surprised to discover this OD uses zero clipping diodes. The only active components in it are two JFETs. Enjoy! (Posted again because the images on the original posting will NOT display.)

If you decide to build or breadboard this out, the Vgs(off) of the JFETs...

Reworked the old THE OP-AMP BIG MUFF π - VERSION 4 Circa 1978 (EH3003B)

Old:

New
ICBM.png
firstopampboard-2.jpg

Please see below post

here we are

V1 triangle
bmbck-2.gif
muff-smooth.png

Yes, that is what I tried to say ... the Shin Ei fuzz pot looks somewhat like the Bender's trimpot ... So that means that the Shin Ei fuzz control is actually a feedback control ... Would it than make more sense (as in; more effect on fuzz sound) to wire it as a series resistor as the trim pot in the Bender?

MXR Envelope Filter
filter.png

Original MXR Blue Box (script version) - Unverified

MXR-blueboxall.png

Little Muff (1973ish)

Done a layout clone for the Little Muff, feel free to download and BYO

Off board info from Arn C.

MXR Dyna Comp Effects Pedal
MXR.png

3rd Party Colorsound Jumbo Tonebender
(AKA B&M Champion Fuzz Unit, B&M Fuzz Unit, CMI Fuzz Unit, GB Fuzz, Pro'Traffic Fuzz Unit)

3 knob Fuzz Face Arbiter Treble And Bass Face

Park Fuzz Sound (Tone Bender MkIII)
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DOD-250.png ....

ACE TONE FUZZ MASTER FM-2
atpcb.png