Big Muff

This is the legendary Big Muff! This unique fuzz distortion pedal provides rich harmonics and a huge dose of sustain.
Steps

Created by DHEA
Status: Active
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Designators and components Step 2 of 5

COMPONENT LIST (Big Muff Version 3)

PCB
BIG MUFF DIY PCB GUITAR EFFECT

Resistors
R1     1M        1M OHM 1/4W 1% METAL FILM RESISTOR
R2     39k       39K OHM 1/4W 1% METAL FILM RESISTOR
R3     47k       47K OHM 1/4W 1% METAL FILM RESISTOR
R4     470k     470K OHM 1/4W 1% METAL FILM RESISTOR
R5     10k       10K OHM 1/4W 1% METAL FILM RESISTOR
R6     100       100 OHM 1/4W 1% METAL FILM RESISTOR
R7     1k         1K OHM 1/4W 1% METAL FILM RESISTOR
R8     10k       10K OHM 1/4W 1% METAL FILM RESISTOR
R9     100k     100K OHM 1/4W 1% METAL FILM RESISTOR
R10    470k    470K OHM 1/4W 1% METAL FILM RESISTOR
R11    10k      10K OHM 1/4W 1% METAL FILM RESISTOR
R12    150      150 OHM 1/4W 1% METAL FILM RESISTOR
R13    10k      10K OHM 1/4W 1% METAL FILM RESISTOR
R14    100k    100K OHM 1/4W 1% METAL FILM RESISTOR
R15    470k    470K OHM 1/4W 1% METAL FILM RESISTOR
R16    10k      10K OHM 1/4W 1% METAL FILM RESISTOR
R17    150      150 OHM 1/4W 1% METAL FILM RESISTOR
R18    39k      39K OHM 1/4W 1% METAL FILM RESISTOR
R19    22k      22K OHM 1/4W 1% METAL FILM RESISTOR
R20    430k    430K OHM 1/4W 1% METAL FILM RESISTOR
R21    100k    100K OHM 1/4W 1% METAL FILM RESISTOR
R22    15k      15K OHM 1/4W 1% METAL FILM RESISTOR
R23    3.3k     3.3k OHM 1/4W 1% METAL FILM RESISTOR

Capacitors
C1    100n      100NF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C2    470p      470PF 50V CERAMIC DISC CAPACITOR
C3    1u          1UF 50V ELECTROLYTIC CAPACITOR 5X11MM
C4    1u          1UF 50V ELECTROLYTIC CAPACITOR 5X11MM
C5    470p      470PF 50V CERAMIC DISC CAPACITOR
C6    100n      100NF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C7    1u          1UF 50V ELECTROLYTIC CAPACITOR 5X11MM
C8    470p      470PF 50V CERAMIC DISC CAPACITOR
C9    100n      100NF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C10   3.9n      3.9NF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C11   10n       10NF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C12   100n     100NF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C13   100n     100NF 100V 5% POLYESTER FILM BOX TYPE CAPACITOR
C14   100u    100UF 35V ELECTROLYTIC CAPACITOR 6X11MM

Transistors
Q1    2N5088     2N5088 GEReNAL PURPOSE TRANSISTOR
Q2    2N5088     2N5088 GEReNAL PURPOSE TRANSISTOR
Q3    2N5088     2N5088 GEReNAL PURPOSE TRANSISTOR
Q4    2N5088     2N5088 GEReNAL PURPOSE TRANSISTOR
Transistor equivalents:  2N5089, BC549C, BC239 , 2N5210...

Diodes
D1    1N4148      1N4148 SWITCHING SIGNAL DIODE
D2    1N4148      1N4148 SWITCHING SIGNAL DIODE
D3    1N4148      1N4148 SWITCHING SIGNAL DIODE
D4    1N4148      1N4148 SWITCHING SIGNAL DIODE

Potentiometers
SUSTAIN    100K-B     100K ohm linear potentiometer
VOL           100K-B     100K OHM LINEAR POTENTIOMETER
TONE         100K-B     100K OHM LINEAR POTENTIOMETER

SEVERAL VERSIONS COMPONENT LIST

PCB

 

PCB SCHEMATIC

 

GENERAL DESCRIPTION OF COMPONENTS

Resistors

The resistors should be ¼ Watt metal type. You can either use a multimeter or the color bands to obtain their values. Resistors do not have polarity, you can place them in any direction.

Electrolytic capacitors

Electrolytic capacitors have their value printed on them. The negative polarity pin is indicated by a white strip along the can. They also have a longer leg indicating the positive pin. The maximum voltage rating never can be exceeded, make sure you are using at least double voltage rating than your power supply. For example, if you are using a 9V power supply, use a electrolytic capacitor with at least 18V maximum voltage rating.

Polyester capacitors

The polyester capacitors have their value marked with three numbers. Read as picofarads (pF), the first two are the 1st and 2nd digits and the third is the multiplier code. These capacitors do not have polarity, you can place them in any direction.

Ceramic capacitors

The ceramic capacitors have their value marked with three numbers. Read as picofarads (pF), the first two are the 1st and 2nd digits and the third is the multiplier code. These capacitors do not have polarity, you can assemble them in any direction.

Diodes

Diodes have their model printed on them. The polarity (cathode) is indicated by the ring near the side. This ring is also marked on the PCB.

Led diodes

Led diodes have polarity, the cathode is indicated as a flat surface on the side of the diode and also it is the shorter led. On the PCB, the cathode is marked as a flat side and anode as a round side.

Transistors

Transistors are three terminals components and their model is printed on them. To indicate the correct orientation, one side of the transistor is flat and the other one is round.

Potentiometers

Potentiometers have their resistance value marked on them. They are marked with A, B or C for logarithmic, linear and reverse logarithmic, respectively.