Akashic Guitar effects circuit lookup
FUZZFREQUENCYEQUALIZELEVEL

125B · 4 knobs

Dirtbox Layouts

Exar SF-02 Super Fuzz

Based on the Univox Super-Fuzz· 37 other boards clone it

Category
Distortion
Controls
Fuzz · Frequency · Equalize · Level
Build
Vero· 24×21
Layout
Unverified · no build reported at Dirtbox Layouts yet
Tags
Distortion, Eq, Exar, Fuzz
Open the layout at Dirtbox Layouts Schematic

From the post

Another Exar box traced by Vitali from Drunk Beaver pedals. I've been curious about this one for a while. It turns out that the fuzz section are a Boss DS-1 derivate. The interesting part lies in the Eq section. The Frequency pot controls both a Big Muff tonestack (with a very deep mid scoop notch) and an active bandpass filter. The Equilize control pans between both filters... It came out quite big but it will fit in 125b box if mounted sideways. Schematic is avaiable HERE.

Schematic

This is a board layout, a drawing of where each part goes, and the post may link the schematic it was drawn from. Open the layout at Dirtbox Layouts. No KiCad fragment has been drawn for this circuit yet.

Parts list 32 rows

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Check before you build · 2 values the reader of this layout was not sure of
  • 2,3K at column 17 rows K-M and column 21 rows H-J: printed clearly as 2,3K both times, unusual value (possibly meant 3.3K or 2.2K)
  • 1nF at column 4 rows T-U (bottom left): printed 1nF but drawn as an electrolytic can, may be a misprint for 1uF
RefValueNormalizedTypeNotes
Resistors 12
×810K10kread from the layout by eye
×4100K100kread from the layout by eye
×31M1Mread from the layout by eye
×422K22kread from the layout by eye
×34.7K4.7kread from the layout by eye
×22.3K2.3kread from the layout by eye
×239K39kread from the layout by eye
×1470K470kread from the layout by eye
×12.2K2.2kread from the layout by eye
×11K1kread from the layout by eye
×122Ω22read from the layout by eye
×1??LED resistor, value not given; read from the layout by eye
Capacitors 8
×647nF47nread from the layout by eye
×31nF1nread from the layout by eye
×11nF1nelectrolytic; read from the layout by eye
×2680pF680pread from the layout by eye
×51uF1uelectrolytic; read from the layout by eye
×110uF10uelectrolytic; read from the layout by eye
×147uF47uelectrolytic; read from the layout by eye
×1100uF100uelectrolytic; read from the layout by eye
Diodes 3
D11N41481N4148read from the layout by eye
D21N41481N4148read from the layout by eye
D31N58171N5817read from the layout by eye
Transistors 3
Q1J113J113JFET; read from the layout by eye
Q2BC550BBC550Bread from the layout by eye
Q3BC550BBC550Bread from the layout by eye
ICs 2
IC1JRC4558DJRC4558Dread from the layout by eye
IC2JRC4558DJRC4558Dread from the layout by eye
Potentiometers 4
FuzzA220KA220kPotentiometerread from the layout by eye
FrequencyB100KB100kPotentiometerdual; read from the layout by eye
EqualizeB100KB100kPotentiometerread from the layout by eye
LevelB10KB10kPotentiometerread from the layout by eye

Other boards based on the Univox Super-Fuzz