Mod The Erratic Clutch Deluxe User manual

The Erratic Clutch
Deluxe
Modkitsdiy.com
1Copyright © 2018 by modkitsdiy.com
Use these instructions to learn:
How to build an effects pedal for fuzzy synth/organ sounds.
The Erratic Clutch Deluxe is a unique effect pedal that gives you fuzzy square wave distortion as well as a
monophonic sub-octave square wave using a total of only four transistors. The two signals can be used
individually or mixed together for a raw synthy output. Full of character and quirk, this pedal will give you
a truly original sound.
The Erratic Clutch Deluxe (K-997)
TO
AMP
IN
FROM
GUITAR
OUT
Unplug when not in use
to save battery life.
SUB SQUAREWAVE
LEVEL SQUAREWAVE
LEVEL
Warning: This circuit was designed for use with a 9 VDC power supply only.
BIAS
OUTPUT
SELECTOR

TABLE OF CONTENTS
TOOL LIST 2
PARTS LIST DRAWINGS 3-4
FINAL ASSEMBLY REFERENCE DRAWING 5
SOLDERING TIPS 6
STEP BY STEP ASSEMBLY INSTRUCTIONS 7-10
Section 1 (Drawings 1 & 2) 7
Section 2 (Drawing 3) 8
Section 3 (Drawing 4) 8-9
Section 4 (Drawing 5) 9
Section 5 (Drawing 6) 10
Section 6 (Drawing 7) 10
Section 7 (Drawing 8) 10
Section 8 (Finishing Up) 10
ASSEMBLY DRAWINGS (8 Drawings) 11-14
These are the last 4 pages. They should be separated and used as a reference to help assemble the
kit correctly. Hi-res color versions available on modkitsdiy.com
2
Visit www.modkitsdiy.com if you have any problems when first turning on your pedal for
troubleshooting help. Remember to use caution when applying power to the pedal to avoid electric
shock.
TOOL LIST
 Wire Strippers
 Needle Nose Pliers
 Hex Key (Allen Wrench)
 Cutting Pliers
 Desoldering Pump
 Solder (60/40 rosin core)
 Soldering Station
 Phillips Head Screwdrivers
 Slotted tip screwdrivers (3 mm tip)
 Channellock Pliers (or similar type)
 Ruler
 Hobby Vise (or other means to secure box while working)

PARTS LIST 1
3
#4 Screw (1/4" long)
S-HS440-14 (6)
#4 Nut
S-HHN440 (6)
#4 Lock Washer
S-HLW4 (6)
Terminal Strip with 8 Terminals
P-0802H (3)
Potentiometers: 100KL and 100KA
R-VAM100KL-SS (1)
R-VAM100KA-SS (2)
Stranded Wire (22 AWG) - Red
K-PUL1569 (3.5 FT)
Enclosure
P-H1590BBCE-BK (1)
Knob (Black with Line)
P-K345 (2)
Battery Clip
S-H155 (1)
¼” Mono Jack (Output Jack)
W-SC-11 (1)
GROUND LUG
TIP LUG
¼” Stereo Jack (Input Jack)
W-SC-12B (1)
RING LUG
SLEEVE LUG
TIP LUG
DPDT Mini Toggle Switch
P-H542 (1)
DC Power Jack
S-H750 (1)
Knob (Black with Line)
P-K344 (1)
3PDT LED Foot Switch
P-H590-RB (1)
1
2
3
4
5
6
7
8
9
CbACr

PARTS LIST 2
4
P-Q2N5088 (4)
NPN BJT (2N5088)
2N
5088
E B C
brown
black
yellow gold
100K
100kΩResistor ½ W
R-A100K (2)
10µF 50V
C-ET10-50 (2)
10µF Polarized Capacitor 50V
brown
black
green gold
1M
1MΩResistor ½ W
R-A1M (2)
gray
red red gold
8.2K
8.2kΩResistor ½ W
R-A8D2K (2)
orange
white
brown gold
390
R-A390 (1)
390ΩResistor ½ W
blue
gray
yellow gold
680K
R-A680K (1)
680kΩResistor ½ W
C-PEID01-100 (2)
0.01µF Capacitor
103
1N4148 High Speed Diode
P-Q971 (2)
yellow
violet
orange gold
47K
R-A47K (2)
47kΩResistor ½ W
red
yellow
black brown
240K
R-M240K (2)
240kΩResistor ½ W
0.22µF Capacitor 100V
C-PEID22-100 (1)
224J
224
green
blue
orange gold
56K
R-A56K (2)
56kΩResistor ½ W
red
black
green gold
2M
2MΩResistor ½ W
R-A2M (1)
330pFCapacitor
C-D330-3000 (2)
331

FINAL ASSEMBLY REFERENCE DRAWING
This is a large version of the final assembly drawing. Refer to this drawing as you make your way through each step of the instructions. Before you make a new
connection at a particular terminal or solder lug, notice how many other connections will be 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 that location has been made.
5
1
2
3
4
6
7
8
9
1 2 3
45 6
1
100KA
C
C
100K
RED
BLK
100KA100KL
TIP TIP
SLEEVE
RING
SLEEVE
240K
390
224
8.2K
56K
56K
10µF 50V
331
C
331
2N
5088
8.2K
100K
103
103
47K
2M 240k
1M
1M
680k
10µF 50V
47K
E B C
EB
E B C
EB
2N
5088
Cb A Cr

SOLDERING TIPS
1. Bend the component lead
and wrap it around the
connection point.
2. Wrap the component lead
so that it can hold itself to the
connection point.
3. Heat up both component
lead and connection point with
the soldering iron.
4. Apply solder to both
component lead and
connection point.
2. Apply fresh solder to mix in
with old solder joint
1. Heat up old solder joint
with the soldering iron.
3. Use a de-soldering tool to
remove the old solder joint
while it is heated.
De-Soldering Tip
6
It is important to make a good solder joint at each connection point. A cold solder joint is a connection that
may look connected but is actually disconnected or intermittently connected. (A cold solder joint can keep
your project from working.)
Follow these tips to make 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.
1. Bend the component lead or wire ending and wrap it around the connection point.
Make sure it is not too close to a neighboring component which could cause an
unintended connection.
2. Wrap the component lead so that it can hold itself to the connection point.
3. Touch the soldering iron to both the component lead and the connection point allowing both to
warm up just before applying the solder to them.
4. Be sure to adequately cover both component lead and connection point with melted solder.
Remove the soldering iron from your work and allow the solder joint to cool. (The
solder joint should be shiny and smooth after solidifying.)
Cut off any excess wire or component leads with cutting pliers.
Clean the soldering iron's tip by wiping it across the wet sponge again after making the
solder joint.

7
SECTION 1
Please refer to DRAWING 1 and DRAWING 2.
Orient the box with ¾” hole nearest you.
 Mount one 100KA pot in the 9/32" hole on the top left side of the box. Make sure that all three lugs
are facing down toward the bottom of the box. Fasten the nut and tighten.
 Mount the 100KL pot in the 9/32" hole on the top center of the box.
Make sure that all three lugs are facing down toward the bottom of
the box. Fasten the nut and tighten.
 Mount the remaining 100KA pot in the 9/32" hole on the top right side
of the box. Make sure that all three lugs are facing down toward the
bottom of the box. Fasten the nut and tighten.
 Bend back and remove the alignment tab on the top of each potentiometer
using a pair of pliers before mounting the pots so that they can mount flush
against the enclosure surface.
Alignment
Tab
 Mount the 8 lug terminal strips to the 1/8" holes as shown in drawing 2
using the #4 screw nut and lock washer. The lock washer goes under
the nut inside the chassis.
Be sure that no lugs are touching the sides of the box or other hardware
added. We will refer to terminal numbers 1 through 24 as #1, #2, etc.
SLEEVE LUG
TIP LUG
Output Jack
RING LUG
SLEEVE LUG
TIP LUG
Input Jack
 Mount the DC power jack in the 15/32" hole on the
left side of the enclosure. Orient its solder lugs so
that the center-pin lug is facing the bottom side of the
enclosure.
 Mount the LED footswitch to the ¾” hole. Be sure to orient the LED leads
towards the bottom with A on the left and Cbon the right.
You must remove the button cap with a hex key before mounting.
 Mount input jack in 3/8" hole on left side of box with hardware provided.
Washer goes under nut on outside of box. Make sure to orient the
jack as shown in Drawing 2. When positioned correctly, tighten nut.
 Mount output jack in 3/8" hole on right side of box with hardware provided.
Washer goes under nut on outside of box. Make sure to orient the
jack as shown in Drawing 2. When positioned correctly, tighten nut.
1
2
3
4
6
7
8
9
1 2 3 4 5 6 7 8
14 13 12 11 10 91516
18 19 20 21 22 23 2417
 Mount the toggle switch in the remaining ¼” hole. Orient it so that the switch
moves left to right.
CENTER
PIN LUG
POSITIVE
SWITCH LUG
POSITIVE
LUG
1 2 3
45 6
Cb ACr
**This build guide uses a lot of right angle bends. This is so the instructions are not only legible but it
also helps to keep leads from shorting since multiple components will be stacked on top of each
other. The right angles are not necessary as long as you make sure that no leads are shorted.**

8
SECTION 2
Please refer to DRAWING 3.
 Strip and tin a ¾” piece of wire and connect the lug 3 on the footswitch
to lug 9 on the footswitch. Solder both connections now.
 Strip and tin a 2” piece of wire and connect lug 8 of the footswitch to
the output jack’s tip lug. Solder both connections now.
 Strip and tin a 2” piece of wire and connect lug 2 of the footswitch to
the input jack’s tip lug. Solder both connections now.
 Strip and tin a 6 ½” piece of wire and connect lug 7 of the footswitch to
the wire joining 2 and 5 of the toggle switch. Solder the connection at
lug 7 of the footswitch as well as the connection at the toggle switch
now.
 Strip ¾” of insulation off of the end of a piece of wire. First tin then snip the
exposed wire from the rest of the wire. Use this piece to connect the center-pin
of the DC power jack to #1. Solder the center pin connection now.
123
CENTER
PIN LUG
POSITIVE
SWITCH LUG
POSITIVE
LUG
1
2
3
4
6
7
8
9
4
6
 Strip ½” of insulation off of the end of a piece of wire. First tin then snip the exposed wire from the rest of
the wire. Use this piece to join lug 5 with lug 2 of the toggle switch. Solder both connections now.
 Strip and tin a 1 ¾” piece of wire and connect #21 to #24 using the bottom
holes for both connections. Solder the connection at #21 now.
 Strip and tin a 1 ½” piece of wire and connect #3 to #15 using the bottom
holes for both connections. Solder both connections now.
 Strip and tin a 5” piece of wire and connect #2 to lug 2 of the 100KL pot using
the bottom hole for the connection at #2. Solder both connections now.
 Connect an 8.2k resistor from #14 to #13 using the bottom holes
for both connections. Solder the connection at #14 now.
 Connect a 100k resistor from #13 to #11 using the bottom holes for both connections.
 Connect the 390 ohm resistor from #4 to #13 using the bottom
holes for both connections. Solder the connection at #4 now.
SECTION 3
Please refer to DRAWING 4.
 Strip and tin a 2” piece of wire and connect the Crof the footswitch to
the sleeve lug of the input jack. Solder both connections now.
 Strip and tin a 1 ¼” piece of wire and connect lug 4 of the
footswitch to #4. Solder both connections now.
 Strip and tin a 1 ½” piece of wire and connect #13 to #20 using the
bottom holes for both connections. Solder the connection at #20 now.
1 2 3 4 5 6 7 8
14 13 12 11 10 91516
18 19 20 21 22 23 2417
bottom holes
SLEEVE LUG
TIP LUG
Output Jack
RING LUG
SLEEVE LUG
TIP LUG
Input Jack
1 2 3
45 6
Cb ACr

9
10µF 50V
negative end
123
black band
 Connect a 10uF capacitor from #14 to #19. Be sure to orient the capacitor
so that the negative lead is connected to #19 and the positive to #14.
1
2
3
4
6
7
8
9
Cb ACr
 Connect a 10uF capacitor from #11 to #22. Be sure to orient the capacitor
so that the negative lead is connected to #22 and the positive to #11.
 Strip ½” of insulation off of the end of a piece of wire. First tin then snip the exposed wire from the rest of
the wire. Use this piece to join lug 3 of the left 100KA pot to bottom hole of #17. Solder both connections
now.
 Strip ½” of insulation off of the end of a piece of wire. First tin then snip the exposed wire from the rest of
the wire. Use this piece to join lug 3 of the right 100KA pot to the bottom hole of #24. Solder both
connections now.
 Connect the 2M resistor from #20 to lug 1 of the 100KL pot. Solder both connections now.
 Connect a 240k resistor from #21 to lug 3 of the 100KL pot. Solder both connections now.
SECTION 4
Please refer to DRAWING 5.
 Strip and tin a ¾” piece of wire and connect lug 5 of the footswitch
to the A pin of the footswitch. Solder both connections now.
 Connect an 8.2k resistor from #3 to #13.
 Connect a 100k resistor from #6 to #13. Solder the connection
at #13 now.
 Connect the 0.22µF capacitor from #2 to lug 1 of the footswitch.
Solder the connection at lug 1 of the footswitch now.
 Connect a 47k resistor from #18 to lug 3 of the toggle switch.
Solder the connection at lug 3 of the toggle switch now.
 Connect a 47k resistor from #23 to lug 4 of the toggle switch.
Solder the connection at lug 4 of the toggle switch now.
 Strip and tin a 1” piece of wire and connect #18 to lug 2
of the left 100KA pot. Solder both connections now.
 Strip and tin a 1” piece of wire and connect #23 to lug 2
of the right 100KA pot. Solder both connections now.
 Strip and tin a 2 ½” piece of wire and connect the positive lug of DC power
jack to bottom hole at #13. Solder the both connections now.
 Connect a 56k resistor from #7 to #11 using the bottom holes
for both connections. Solder both connections now.
 Connect a 56k resistor from #6 to #10 using the bottom holes
for both connections. Solder both connections now.
CENTER
PIN LUG
POSITIVE
SWITCH LUG
POSITIVE
LUG
1 2 3 4 5 6 7 8
14 13 12 11 10 91516
18 19 20 21 22 23 2417
1 2 3
45 6

10
 Locate the battery clip. Connect the red wire to the positive-switch lug of the DC power jack.
Connect the black wire to the ring lug of the input jack. Solder both connections now.
 Connect a 2N5088 transistor to #11, #10, and #9. Make sure the
flat side of the transistor is facing up with the body pointing towards
the footswitch. The orientation must match drawing 7. Solder
connections on #11 and #9 now.
#9: Emitter
#10: Base
#11: Collector
2N
5088
EBC
SECTION 8
Attach the knobs provided to the potentiometer shafts. Install a 9 volt battery, close the cover using
the screws provided (battery not required when using 9v DC power supply). Plug a guitar into input
jack on right. This turns the unit on. Plug a cable into output jack and plug it into your amplifier.
-Unplug from the input jack of the unit to turn it off and save power.
It’s always a good idea to thoroughly double-check your connections before applying power.
 Connect a 0.01µF capacitor from #5 to #14.
 Connect a 0.01µF capacitor from #14 to #12.
 Connect a 1M resistor from #5 to #6.
 Connect a 1M resistor from #12 to #11.
SECTION 7
Please refer to DRAWING 8.
 Connect a 2N5088 transistor to #16, #15, and #14. Make sure the
flat side of the transistor is facing down with the body pointing
towards the footswitch. The orientation must match drawing 8.
Solder connections on #16, #15, and #14 now.
#16: Emitter
#15: Base
#14: Collector
2N
3906
CBE
 Connect a diode from #5 to #7 with the black band connecting to #5. Solder connection at #5 now.
 Connect a diode from #12 to #10 with the black band connecting to #12. Solder both connections now.
 Connect a 2N5088 transistor to #6, #7, and #8. Make sure the flat
side of the transistor is facing down with the body pointing towards
the pots. The orientation must match drawing 8. Solder
connections on #6, #7, and #8 now.
#6: Emitter
#7: Base
#8: Collector
2N
3906
C B E
black band
SECTION 6
Please refer to DRAWING 7.
 Connect a 2N5088 transistor to #1, #2, and #3. Make sure the flat
side of the transistor is facing up with the body pointing towards
the pots. The orientation must match drawing 7. Solder
connections on #1, #2, and #3 now.
#1: Emitter
#2: Base
#3: Collector
2N
5088
E B C
SECTION 5
Please refer to DRAWING 6.
 Connect a 330pF capacitor from #7 to #11.
 Connect a 330pF capacitor from #6 to #10. Be careful not to short these two capacitors.
 Connect the 680k resistor from #19 to lug 1 of the left 100KA pot. Solder both connections now.
 Connect a 240k resistor from #22 to lug 1 of the right 100KA pot. Solder both connections now.
1 2 3 4 5 6 7 8
14 13 12 11 10 91516
18 19 20 21 22 23 2417
123
Finishing Up

DRAWING 1
LEFT SIDE
RIGHT SIDE
DRAWING 2
11
123 1231 2 3
1 2 3 4 5 6 7 8
14 13 12 11 10 9
1
2
3
4
5
6
7
8
9
INPUT OUTPUT
1 2 3
45 6
3/4"
1/8"1/8"
1/8" 1/8"
1/4"
3/8"
3/8"
15/32"
9/32"9/32" 9/32"
1/8"1/8"
INSIDE VIEW OF THE
ENCLOSURE
1516
18 19 20 21 22 23 2417
TIP TIP
SLEEVE
RING
SLEEVE
1
2
3
4
6
7
8
9
100KA 100KA100KL
5
Cb ACr

1 2 3
45 6
DRAWING 3
12
TIP TIP
SLEEVE
RING
SLEEVE
1
2
3
4
6
7
8
9
1 2 3
45 6
DRAWING 4
TIP TIP
SLEEVE
RING
SLEEVE
1
2
3
4
6
7
8
9
100KA 100KA100KL
100KA 100KA100KL
100K
390
8.2K
56K
56K
2M 240k
100K
390
8.2K
10µF 50V 10µF 50V
5
5
3 5 6 7 8
11 10 916
18 19 20 21 22 23 2417
3 5 8
916
18 20 21 23 2417
Cb ACr
Cb ACr

1
2
3
4
6
7
8
9
1 2 3
45 6
DRAWING 5
DRAWING 6
13
100KA
100K
100KA100KL
TIP TIP
SLEEVE
RING
SLEEVE
240K
390
224
8.2K
56K
56K
10µF 50V
331
331
8.2K
100K
47K
2M 240k
1M
680k
10µF 50V
47K
1
2
3
4
6
7
8
9
1 2 3
45 6
100KA
100K
100KA100KL
TIP TIP
SLEEVE
RING
SLEEVE
390
224
8.2K
56K
56K
10µF 50V
8.2K
100K
47K
2M 240k
10µF 50V
47K
5
5 8
916
20 21 2417
8
916
20 21 2417
Cb ACr
Cb ACr

DRAWING 7
1
2
3
4
6
7
8
9
1 2 3
45 6
DRAWING 8
14
100KA
C
C
100K
RED
BLK
100KA100KL
TIP TIP
SLEEVE
RING
SLEEVE
240K
390
224
8.2K
56K
56K
10µF 50V
331
C
331
2N
5088
8.2K
100K
103
103
47K
2M 240k
1M
1M
680k
10µF 50V
47K
1
2
3
4
6
7
8
9
1 2 3
45 6
100KA
100K
100KA100KL
TIP TIP
SLEEVE
RING
SLEEVE
240K
390
224
8.2K
56K
56K
10µF 50V
331
331
2N
5088
8.2K
100K
103
103
47K
2M 240k
1M
1M
680k
10µF 50V
47K
E B C
EBC
E B C
EB
E B C
EB
2N
5088
2N
5088
5
5
8
916
20 21 2417
8
916
20 21 2417
Cb ACr
Cb ACr