Akashic Guitar effects circuit lookup
FUZZVOLUME

Enclosure not stated · 2 knobs

Tagboard Effects

Dunlop - Eric Johnson Signature Fuzz Face EJF1Verified

Based on the Dallas Arbiter Fuzz Face· 62 other boards clone it

Category
Fuzz
Controls
Fuzz · Volume
Build
Vero· 10×9
Layout
Verified · Tagboard Effects marks it as built and working
Tags
Dunlop, Fuzz
Open the layout at Tagboard Effects

From the post

There is an ongoing discussion on FSB about this pedal, because we know that there are some hidden surface mount components underneath the board, and so this is based on a best guess by Marc Ahlfs after some experimentation he did on the circuit.

Info from Dunlop about the original:

No one cares more about tone than Eric Johnson, and his choice for getting sweet, singing lead tones is the Eric Johnson Signature Fuzz Face. EJ worked closely with Fuzz Face guru Jeorge Tripps to create his signature pedal. It is inspired by EJ’s prized personal Fuzz Faces and is built to his incredibly strict specifications, featuring hand-selected BC183 silicon transistors (for higher gain), custom repro ’68-’69 knobs, and a vintage-style hammertone finish. The result: a beautifully dynamic, expressive, and powerful pedal. “I first heard the Fuzz Face when I was about 12 and loved playing through it,” he says. “It’s the classic tone used by Jimi Hendrix, one of my greatest influences. No other pedal gets this type of sound. It’s the pinnacle of psychedelic fuzz.”

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 Tagboard Effects. No KiCad fragment has been drawn for this circuit yet.

Parts list 16 rows

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Check before you build · 3 values the reader of this layout was not sure of
  • 6K resistor next to the trimmer: printed clearly, unusual value
  • 15u electrolytic at the bottom right: printed clearly, unusual value
  • 1u capacitor at the left is drawn as a brown oval (not a can), type not stated
RefValueNormalizedTypeNotes
Resistors 6
×16K6kread from the layout by eye
×1330R330read from the layout by eye
×11M1Mread from the layout by eye
×139K39kread from the layout by eye
×1120K120kread from the layout by eye
×127R27read from the layout by eye
Capacitors 5
×110n10nread from the layout by eye
×127p27pread from the layout by eye
×11u1uread from the layout by eye
×147u47uelectrolytic; read from the layout by eye
×115u15uelectrolytic; read from the layout by eye
Transistors 2
Q1BC183LBC183L250 hfe; read from the layout by eye
Q2BC183CBC183C650 hfe; read from the layout by eye
Potentiometers 2
FuzzB1KB1kPotentiometerread from the layout by eye
VolumeC500KC500kPotentiometerread from the layout by eye
Trimmers 1
×15K5kbias Q2 collector to 3V; read from the layout by eye

Other boards based on the Dallas Arbiter Fuzz Face