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Mad Professor Fire Red Fuzz

Based on the Mad Professor Fire Red Fuzz· 3 other boards clone it

Category: Fuzz
Controls: Fuzz · Tone · Volume
Price: see vendor
Tags: freestompboxes.org trace

Read the post at Revolution Deux Schematic image

From the vendor

A Big Muff derivative with BC550C stages: an input boost, a pot-controlled fuzz level, then two clipping stages, the first clipped by a pair of 2N3819 JFETs used as diodes and the second by 1N4148s. A Big Muff-style tone stack is followed by a 2N5485 JFET output stage.

Schematic

The schematic is in the post. Open it at Revolution Deux. No KiCad fragment has been drawn for this circuit yet.

Parts list 51 rows

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Ref	Value	Normalized	Type	Notes
Resistors 25
R23	3K	3k		LED resistor; read from the schematic by eye
R21	100	100		read from the schematic by eye
R1	33K	33k		read from the schematic by eye
R2	1M	1M		read from the schematic by eye
R5	470K	470k		read from the schematic by eye
R3	100K	100k		read from the schematic by eye
R6	15K	15k		read from the schematic by eye
R4	100	100		read from the schematic by eye
R7	470	470		read from the schematic by eye
R9	8.2K	8.2k		read from the schematic by eye
R15	470K	470k		read from the schematic by eye
R16	10K	10k		read from the schematic by eye
R8	100K	100k		read from the schematic by eye
R10	100	100		read from the schematic by eye
R24	8.2K	8.2k		read from the schematic by eye
R17	470K	470k		read from the schematic by eye
R19	15K	15k		read from the schematic by eye
R18	100K	100k		read from the schematic by eye
R25	150	150		read from the schematic by eye
R12	22K	22k		read from the schematic by eye
R11	22K	22k		read from the schematic by eye
R13	68K	68k		read from the schematic by eye
R14	2K	2k		read from the schematic by eye
R20	6.8K	6.8k		read from the schematic by eye
R22	14.7K	14.7k		read from the schematic by eye
Capacitors 13
C13	100u	100u		electrolytic, 35V; read from the schematic by eye
C1	100n	100n		read from the schematic by eye
C9	1u	1u		electrolytic, 50V; read from the schematic by eye
C5	100n	100n		read from the schematic by eye
C2	100n	100n		read from the schematic by eye
C3	470p	470p		read from the schematic by eye
C4	100n	100n		read from the schematic by eye
C12	1u	1u		electrolytic, 50V; read from the schematic by eye
C7	3.9n	3.9n		read from the schematic by eye
C6	10n	10n		read from the schematic by eye
C8	220n	220n		read from the schematic by eye
C11	10u	10u		electrolytic, 50V; read from the schematic by eye
C10	1u	1u		electrolytic, 50V; read from the schematic by eye
Diodes 4
D4	5.1V zener	5V1		to LED; read from the schematic by eye
D3	1N4007	1N4007		read from the schematic by eye
D1	1N4148	1N4148		read from the schematic by eye
D2	1N4148	1N4148		read from the schematic by eye
Transistors 6
Q1	BC550C	BC550C		read from the schematic by eye
Q4	2N3819	2N3819		JFET clipper; read from the schematic by eye
Q5	2N3819	2N3819		JFET clipper; read from the schematic by eye
Q2	BC550C	BC550C		read from the schematic by eye
Q3	BC550C	BC550C		read from the schematic by eye
Q6	2N5485	2N5485		read from the schematic by eye
Potentiometers 3
Fuzz	A100K	A100k	Potentiometer	read from the schematic by eye
Tone	B100K	B100k	Potentiometer	read from the schematic by eye
Volume	B100K	B100k	Potentiometer	read from the schematic by eye

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