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Copyright © 2015 by modkitsdiy.com

Use these instructions to learn:

How to build an effects pedal for fuzz with non-selective frequency tripler.

The Contortionist II kit is an all analog, high octane fuzz box. It produces fuzz with layered octave 
overtones similar to those produced by an electronic-bow. The frequency multiplier circuitry creates 
harmonics that swell and recede depending on gain setting, pick attack, neck position and pickup. This is a 
high gain circuit that can put out up to 2 volts and will provide ample amounts of sustain.

Added features to the original contortionist circuit include a tone control and LED.

THE CONTORTIONIST II (K-965)

Warning:  This circuit was designed for use with a 9 VDC power supply only.

TO 

AMP 

IN

FROM 

GUITAR 

OUT

Unplug when not in use 

to save battery life.

VOLUME

FUZZ

9 VDC

CENTER (-) 

ADAPTER

LED

The Contortionist II

Modkitsdiy.com

High Octane Fuzz Box

TONE

Summary of Contents for CONTORTIONIST II

Page 1: ...monics that swell and recede depending on gain setting pick attack neck position and pickup This is a high gain circuit that can put out up to 2 volts and will provide ample amounts of sustain Added f...

Page 2: ...d tip screwdrivers 3 mm tip Channellock Pliers or similar type Ruler Hobby Vise or other means to secure box while working TABLE OF CONTENTS TOOL LIST p 2 PARTS LIST DRAWINGS pp 3 4 SOLDERING TIPS p 6...

Page 3: ...9 BLUE 4 FT PARTS LIST 1 3 RING LUG SLEEVE LUG TIP LUG GROUND LUG TIP LUG Potentiometers 24 mm diameter R VA1KL 1 1 2 3 R VA250KA 1 Terminal Strip with 8 Terminals P 0802H 2 DC Power Jack S H750 1 Ter...

Page 4: ...1 NPN BJT 2N3904TAR 2N 3904 E B C 22 F 50V C ET22 50 1 22 F Polarized Capacitor 50V 330pF Capacitor 3kV C D330 3000 1 3M W R A3M 1 orange black green gold 3M 331K 0 1 F Capacitor 100V C PEID1 100 2 10...

Page 5: ...made at that terminal That way you can decide whether it s best for you to solder the connection and leave space open for future connections or hold off on soldering until after every connection at t...

Page 6: ...e a good solder joint Take your time with each connection and make sure that all components are connected and will remain connected if your project is bumped or shaken Bend the component lead or wire...

Page 7: ...enclosure Make sure the center solder lug of the input jack is facing up Correct positioning of the jack makes soldering the connections easier Mount the output jack in the 3 8 hole on the right side...

Page 8: ...connect terminal 15 to the power jack s positive lug CENTER PIN LUG POSITIVE SWITCH LUG POSITIVE LUG Strip and tin a 1 piece of wire and connect terminal 5 to 7 Suggestion 4 wires components will be c...

Page 9: ...or 2N 3906 E B C Connect the 2N3906 transistor to terminals 12 13 and 14 as listed below Solder all of the connections at these terminals now Terminals 12 Collector Terminals 13 Base Terminals 14 Emit...

Page 10: ...g a battery for power remember to unplug from the input jack of the pedal to turn it off and save battery life It s always a good idea to thoroughly double check your connections before applying power...

Page 11: ...1 2 3 1 2 3 1 2 3 15 32 1 8 5 16 5 16 1 4 9 32 1 8 1 8 1 8 1 8 3 8 3 8 15 32 TOP LEFT SIDE RIGHT SIDE DRAWING 1 DRAWING 2 11 INSIDE VIEW OF THE ENCLOSURE 250KA 1KL 100KA...

Page 12: ...4 5 6 7 8 9 18 TIP TIP SLEEVE SLEEVE RING FUZZ VOLUME TONE 1 2 3 1 2 3 1 2 3 250KA 1KL 100KA 1 1 8 9 16 19 17 12 6 14 4 2 7 10 11 13 15 2 3 4 5 6 7 8 9 18 TIP TIP SLEEVE SLEEVE RING FUZZ VOLUME TONE 1...

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