PedalPCB· PCB433

Clandestine Preamp

Based on the Chase Tone Secret Preamp· 1 other board clones it

From the vendor

Controls

• Volume

• EQ (Toggle switch)

Specifications

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

Documentation

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.

Ref	Value	Normalized	Type	Notes
Resistors 10
R1	100K	100k	Resistor, 1/4W
R2	1M	1M	Resistor, 1/4W
R3	3K3	3.3k	Resistor, 1/4W
R4	1M	1M	Resistor, 1/4W
R5	1M	1M	Resistor, 1/4W
R6	240K	240k	Resistor, 1/4W
R7	100K	100k	Resistor, 1/4W
R8	100K	100k	Resistor, 1/4W
R100	4K7	4.7k	Resistor, 1/4W
R101	1K	1k	Resistor, 1/4W
Capacitors 10
C1	220p	220p	Ceramic capacitor
C2	22n	22n	Film capacitor, 7.2 x 2.5mm
C3	22n	22n	Film capacitor, 7.2 x 2.5mm
C4	100n	100n	Film capacitor, 7.2 x 2.5mm
C5	10n	10n	Film capacitor, 7.2 x 2.5mm
C100	220u	220u	Electrolytic capacitor, 5mm
C101	10u	10u	Electrolytic capacitor, 5mm	� 25V minimum
C102	10u	10u	Electrolytic capacitor, 5mm	� 25V minimum
C103	10u	10u	Electrolytic capacitor, 5mm	� 25V minimum
C104	220u	220u	Electrolytic capacitor, 5mm	� 25V minimum
Diodes 6
D100	1N5817	1N5817	Schottky diode, DO-41
D101	1N5817	1N5817	Schottky diode, DO-41
D102	1N5817	1N5817	Schottky diode, DO-41
D103	1N5817	1N5817	Schottky diode, DO-41
D104	1N5817	1N5817	Schottky diode, DO-41
D105	1N4748A	1N4748A	Zener diode 1W, 22V
Transistors 1
Q1	2N5457	2N5457	JFET transistor, N-channel
ICs 1
IC100	TC1044SCPA	TC1044SCPA	Charge pump IC, DIP8
Potentiometers 1
VOLUME	A500K	A500k	16mm right-angle PCB mount pot
Trimmers 1
TRIM	50K	50k	Trimmer potentiometer, 3362P type
Switches 1
EQ	ON/OFF/ON	ON/OFF/ON	Toggle switch, SPDT	3-position (ON/OFF/ON)