PedalPCB Pumbaa Distortion User manual

Copyright © 2023 - PedalPCB.com Page 1 of 5Pumbaa Distortion
Pumbaa Distortion
Revised 12/15/22
All trademarks and registered trademarks are the property of their respective owners. The company, product, and service names used in this web site
are for identication purposes only. Use of these names, logos, and brands does not imply endorsement.
• Volume
• Gain
• Tone
• Calibre
CONTROLS AND FEATURES

Copyright © 2023 - PedalPCB.com Page 2 of 5
Pumbaa Distortion
Pumbaa Distortion
Parts List (Page 1 of 1)
LOCATION VALUE TYPE NOTES
R1 10M Resistor, 1/4W
R2 10M Resistor, 1/4W
R3 5K1 Resistor, 1/4W
R4 1K Resistor, 1/4W
R5 100K Resistor, 1/4W
R6 560R Resistor, 1/4W
R7 1K Resistor, 1/4W
R8 1K5 Resistor, 1/4W
R9 2M2 Resistor, 1/4W
R10 1M8 Resistor, 1/4W
R11 10K Resistor, 1/4W
R12 220R Resistor, 1/4W
R13 10K Resistor, 1/4W
R14 10K Resistor, 1/4W
R100 4K7 Resistor, 1/4W * LED current limiting resistor
C1 100n Film capacitor, 7.2 x 2.5mm
C2 22n Film capacitor, 7.2 x 2.5mm
C3 1n Film capacitor, 7.2 x 2.5mm
C4 4u7 Electrolytic capacitor, 5.0mm
C5 1n Film capacitor, 7.2 x 2.5mm
C6 33p Ceramic capacitor
C7 4u7 Electrolytic capacitor, 5.0mm
C8 3n3 Film capacitor, 7.2 x 2.5mm
C9 22n Film capacitor, 7.2 x 2.5mm
C10 1u Film capacitor, 7.2 x 5.0mm
C11 47u Electrolytic capacitor, 6.3mm
C12 100u Electrolytic capacitor, 6.3mm
D1 9V1 Zener diode 1/2W, 9.1V
D2 5mm Red 5mm Red LED
D3 5mm Red 5mm Red LED
D4 1N4148 Signal diode, DO-35
D5 1N4148 Signal diode, DO-35
D100 1N5817 Schottky diode, DO-41
Q1 BS170 N-Channel MOSFET
Q2 2N5457 JFET transistor, N-channel
IC1 OPA604AP Single op-amp, DIP8
VOLUME A100K 16mm right-angle PCB mount pot
GAIN A100K 16mm right-angle PCB mount pot
TONE A100K 16mm right-angle PCB mount pot
CALIBRE C5K 16mm right-angle PCB mount pot

Copyright © 2022 - PedalPCB.com Page 3 of 5
Pumbaa Distortion
Pumbaa Distortion
Schematic Diagram

Copyright © 2023 - PedalPCB.com Page 4 of 5
Pumbaa Distortion
Pumbaa Distortion
Wiring Diagram

F
O
O
T
S
W
I
T
C
H
P
O
T
E
N
T
I
O
M
E
T
E
R
P
O
T
E
N
T
I
O
M
E
T
E
R
P
O
T
E
N
T
I
O
M
E
T
E
R
P
O
T
E
N
T
I
O
M
E
T
E
R
L
E
D
D
C
J
A
C
K
I
N
P
U
T
J
A
C
K
O
U
T
P
U
T
J
A
C
K
Copyright © 2023 - PedalPCB.com Page 5 of 5
Pumbaa Distortion
Pumbaa Distortion
Drill Template
125B Enclosure
Volume Gain
Tone Calibre