Big Muff

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

Steps

Designators and components Step 2 of 5

COMPONENT LIST (Big Muff 3rd Edition)

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-A 100K ohm LOG potentiometer
VOL 100K-A 100K OHM LOG POTENTIOMETER
TONE 100K-B 100K OHM LINEAR POTENTIOMETER

SEVERAL BIG MUFF VERSIONS

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.

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Big Muff

Steps

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Designators and components Step 2 of 5