Akashic Guitar effects circuit lookup
VOLUMEDRIVETREBLEBASS

125B · 4 knobs

PedalPCB· PCB251

Son of Ben Preamp

Based on the Benson Preamp· 7 other boards clone it

Category
Preamp / Amp-in-a-box· Preamps
Controls
Volume · Drive · Treble · Bass
Price
$8.00in stock
Tags
125B, 125B 4-Knob (Type 1)
Buy the PCB at PedalPCB Build document11/12/24 Tayda drill template

From the vendor

Controls

• Volume

• Drive

• Treble

• Bass

Details

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

Schematic

The schematic is in the vendor's build document, page 4. Open the build document. No KiCad fragment has been drawn for this circuit yet.

Parts list 37 rows

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RefValueNormalizedTypeNotes
Resistors 14
R11M1MResistor, 1/4W
R2220K220kResistor, 1/4W
R31M1MResistor, 1/4W
R41K1kResistor, 1/4W
R510K10kResistor, 1/4W
R6470K470kResistor, 1/4W
R7470K470kResistor, 1/4W
R81K1kResistor, 1/4W
R910K10kResistor, 1/4W
R10100K100kResistor, 1/4W
R111K1kResistor, 1/4W
R1210K10kResistor, 1/4W
R1347K47kResistor, 1/4W
R1004K74.7kResistor, 1/4W
Capacitors 12
C1100n100nFilm capacitor, 7.2 x 2.5mm
C222n22nFilm capacitor, 7.2 x 2.5mm
C3250p250pCeramic capacitor
C4470p470pCeramic capacitor
C510u10uElectrolytic capacitor, 5mm
C622n22nFilm capacitor, 7.2 x 2.5mm
C722n22nFilm capacitor, 7.2 x 2.5mm
C822n22nFilm capacitor, 7.2 x 2.5mm
C92n22.2nFilm capacitor, 7.2 x 2.5mm
C1010u10uElectrolytic capacitor, 5mm*Optional (see Page 3)
C100100u100uElectrolytic capacitor, 5mm
C101100n100nFilm capacitor, 7.2 x 2.5mm
Diodes 1
D1001N58171N5817Schottky diode, DO-41
Transistors 3
Q1J201J201JFET transistor, N-channel*Alternate MMBFJ201 (SMD)
Q2J201J201JFET transistor, N-channel*Alternate MMBFJ201 (SMD)
Q3J201J201JFET transistor, N-channel*Alternate MMBFJ201 (SMD)
Potentiometers 3
VOLUMEA100KA100k16mm right-angle PCB mount pot
DRIVEA1MA1M16mm right-angle PCB mount pot
TREBLEA250KA250k16mm right-angle PCB mount pot
Trimmers 3
TRIM150K50kTrim potentiometer3362P-style
TRIM250K50kTrim potentiometer3362P-style
TRIM350K50kTrim potentiometer3362P-style
Other 1
BASS********** Refer to Page 3

Other boards based on the Benson Preamp