Akashic Guitar effects circuit lookup
VOLUMEDRIVEBASSMIDTREBLECUTCLIP

125B · 7 knobs

PedalPCB· PCB674

Zorkmid Overdrive

Based on the Paul Cochrane Zefram Overdrive· 1 other board clones it

Category
Fuzz· OD / Distortion / Fuzz
Controls
Volume · Drive · Bass · Mid · Treble · Cut · Clip
Price
$12.00in stock
Tags
125B
Buy the PCB at PedalPCB Build document3/16/25

From the vendor

Controls

• Volume

• Drive

• Bass

• Mid

• Treble

• Cut (Toggle switch)

• Clip (Toggle switch)

Details

• Designed for a 125B enclosure with top-mounted jacks

The company, product and service names used in this web site are for identification purposes only. All trademarks and registered trademarks are the property of their respective owners. This product is not manufactured or distributed by Paul C Audio, maker of the Paul C Zefram Overdrive.

PedalPCB is not affiliated with Paul C Audio or Paul Cochrane.

Schematic

The schematic is in the vendor's build document, page 3. Open the build document. No KiCad fragment has been drawn for this circuit yet.

Parts list 53 rows

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RefValueNormalizedTypeNotes
Resistors 15
R11M1MResistor, 1/4W
R21M1MResistor, 1/4W
R31K1kResistor, 1/4W
R44K74.7kResistor, 1/4W
R52K22.2kResistor, 1/4W
R63K33.3kResistor, 1/4W
R79K19.1kResistor, 1/4W
R8680R680Resistor, 1/4W
R93K33.3kResistor, 1/4W
R104K74.7kResistor, 1/4W
R111K51.5kResistor, 1/4W
R121K51.5kResistor, 1/4W
R1347K47kResistor, 1/4W
R10022R22Resistor, 1/4W
CLR4K74.7kResistor, 1/4W* LED current limiting resistor
Capacitors 19
C133n33nFilm capacitor, 7.2 x 2.5mm
C2100p100pCeramic capacitor
C31n51.5nFilm capacitor, 7.2 x 2.5mm
C4100n100nFilm capacitor, 7.2 x 2.5mm
C51u1uFilm capacitor, 7.2 x 5.0mm
C633n33nFilm capacitor, 7.2 x 2.5mm
C7100p100pCeramic capacitor
C833n33nFilm capacitor, 7.2 x 2.5mm
C91u1uFilm capacitor, 7.2 x 5.0mm
C1033n33nFilm capacitor, 7.2 x 2.5mm
C111u1uFilm capacitor, 7.2 x 5.0mm
C1247n47nFilm capacitor, 7.2 x 2.5mm
C100100u100uElectrolytic capacitor, 5mm
C101100u100uElectrolytic capacitor, 5mm
C102100u100uElectrolytic capacitor, 5mm
C103100n100nFilm capacitor, 7.2 x 2.5mm
C104100n100nFilm capacitor, 7.2 x 2.5mm
C105100n100nFilm capacitor, 7.2 x 2.5mm
C106100n100nFilm capacitor, 7.2 x 2.5mm
Diodes 9
D11N41481N4148Signal diode, DO-35
D21N41481N4148Signal diode, DO-35
D31N41481N4148Signal diode, DO-35
D41N41481N4148Signal diode, DO-35
D51N41481N4148Signal diode, DO-35
D61N41481N4148Signal diode, DO-35
D71N41481N4148Signal diode, DO-35
D1001N58171N5817Schottky diode, DO-41
D1011N47421N4742 / 12VZener diode 1W, 12V
ICs 3
IC1TL072TL072Dual op-amp, DIP8
IC2RC4558RC4558Dual op-amp, DIP8
IC3TC1044SCPATC1044SCPACharge pump IC, DIP8
Potentiometers 5
VOLUMEA10KA10k16mm right-angle PCB mount pot
GAINA500KA500k16mm right-angle PCB mount pot
TREBLEC10KC10k16mm right-angle PCB mount pot
MIDC50KC50k16mm right-angle PCB mount pot
BASSC25KC25k16mm right-angle PCB mount pot
Switches 2
CUTON/OFF/ONON/OFF/ONToggle switch, DPDT3-position (ON/OFF/ON)
CLIPON/OFF/ONON/OFF/ONToggle switch, SPDT3-position (ON/OFF/ON)

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