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EP3 Preamp

Based on the Maestro Echoplex EP-3 Preamp· 6 other boards clone it

Schematic

The schematic image is on the project page. Open it at PCBWay.

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Ref	Value	Normalized	Type	Notes
Resistors 11
×1	60	60		value drawn as 60; read from the schematic by eye
×1	3k3	3.3k		read from the schematic by eye
×1	4k7	4.7k		read from the schematic by eye
×1	10k	10k		read from the schematic by eye
×1	15k	15k		read from the schematic by eye
×2	22k	22k		read from the schematic by eye
×3	100k	100k		read from the schematic by eye
×2	220k	220k		read from the schematic by eye
×1	470k	470k		read from the schematic by eye
×4	1M	1M		read from the schematic by eye
×1	2M2	2.2M		read from the schematic by eye
Capacitors 7
×2	220p	220p		read from the schematic by eye
×3	22n	22n		read from the schematic by eye
×3	100n	100n		read from the schematic by eye
×3	470n	470n		read from the schematic by eye
×2	10u	10u		electrolytic; read from the schematic by eye
×1	47u	47u		electrolytic; read from the schematic by eye
×1	100u	100u		electrolytic; read from the schematic by eye
Diodes 2
×3	1N5817	1N5817		read from the schematic by eye
×1	1N4742A	1N4742A / 12V		12V zener; read from the schematic by eye
Transistors 2
×1	2N5484	2N5484		read from the schematic by eye
×1	2N5485	2N5485		read from the schematic by eye
ICs 1
×1	LT1054CP	LT1054CP		charge pump; read from the schematic by eye
Potentiometers 1
Volume	B500k	B500k	Potentiometer	read from the schematic by eye
Switches 1
Fat	SPDT	SPDT		toggle switching the 22n/47u source bypass; read from the schematic by eye