ToneFreak Severe Distortion

Basically, a Marshall Guvnor derivative distortion pedal which is more similar of that from MI Audio's Crunchbox. Clipping is at the feedback loop of the opamp rather than shunting it to ground as seen in the latter.
A few notes:
- the VOLUME pot's Wiper(2) is the effect OUT.
- An SPDT with CENTER OFF toggle switch is used(this is much of a PRESENCE function similar to Crunchbox, only with a fixed 4.7K resistor). "center" pad refers to the CENTER pole of the toggle switch.
- CLIPPING selector switch, use an SPDT with CENTER OFF toggle switch same as mentioned above. Pads located between the 51pF cap and 10K resistor just above the opamp.
- Si refers to Silicon diode(i.e. 1N4148 or similar)
- Ge refers to Germanium diode(i.e. 1N34A, 1N60, etc)
- All SQUARE pads of the diode is the CATHODE.
- The 1M resistor beside the JUMPER, the 100pF and 2.2uF cap is actually 560K in actual SEVERE units.
- Leave the pads empty labeled as "LED" just above the 1N4001 protection diode.

There you have it!. Rawk on!.

Layout Download

Tech 21 XXL

Here you go as requested, this is the Tech 21 XXL distortion layout minus the CMOS switching and the input buffer of the original circuit. You may want to add a capacitor from 0.1uF-1uF in the jumper labeled as "Cin?" and also changing the biasing ressistor labeled "100K??" into a 1M resistor. Anyway, that is just only a suggestion. Pots are all 100K LINEAR.

Layout Download

DNA Gain F***er 2

This is the layout of the Gain F***er 2 distortion from DNA Analogic. Pads are provided to FETs and bipolar transistors that has different pinouts. Pots are all 100K. I would recommend using log tapers at DRIVE and LEVEL controls, a reverse audio taper at CUT, and a linear one at the FXXX control. Enjoy!

Layout Download