Aft Preamp

Based on the EQD Bows· 2 other boards clone it

From the vendor

Controls

• Level

• Tone – Treble / Full(Toggle switch)

Specifications

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

Documentation

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

Ref	Value	Normalized	Type
Resistors 7
R1	1M	1M	Resistor, 1/4W
R2	10K	10k	Resistor, 1/4W
R3	68K	68k	Resistor, 1/4W
R4	470K	470k	Resistor, 1/4W
R5	100R	100	Resistor, 1/4W
R6	1M	1M	Resistor, 1/4W
R100	4K7	4.7k	Resistor, 1/4W
Capacitors 6
C1	100n	100n	Film capacitor, 7.2 x 2.5mm
C2	4n7	4.7n	Film capacitor, 7.2 x 2.5mm
C3	47u	47u	Electrolytic capacitor, 5mm
C4	100n	100n	Film capacitor, 7.2 x 2.5mm
C5	100n	100n	Film capacitor, 7.2 x 2.5mm
C100	100u	100u	Electrolytic capacitor, 5mm
Diodes 1
D100	1N5817	1N5817	Schottky diode, DO-41
Transistors 1
Q1	OC139	OC139	Germanium transistor, NPN
Potentiometers 1
LEVEL	B10K	B10k	16mm right-angle PCB mount pot