1590B · 3 knobs

Dragonbeard Jr

Based on the Bixonic Expandora· 7 other boards clone it

Schematic

The schematic is in the vendor's build document, page 12. Open the build document. No KiCad fragment has been drawn for this circuit yet.

Ref	Value	Normalized	Type
Resistors 22
R1	2M2	2.2M
R2	100k	100k
R3	2M2	2.2M
R4	2M2	2.2M
R5	43k	43k
R6	370R	370
R7	1k1	1.1k
R8	47R	47
R9	560R	560
R10	1k1	1.1k
R11	1k5	1.5k
R12	1M	1M
R13	1k1	1.1k
R14	100k	100k
R15	51k	51k
R16	820k	820k
R17	4k7	4.7k
R18	47k	47k
R19	4k7	4.7k
R20	47R	47
R21	10k	10k
R22	10k	10k
Capacitors 19
C1	100n	100n
C2	33pF	33p
C3	1uF	1u
C4	22n	22n
C5	1n	1n
C6	33pF	33p
C7	100pF	100p
C8	2u2	2.2u
C9	4u7	4.7u
C10	4u7	4.7u
C11	3n3	3.3n
C12	100n	100n
C13	1uF	1u
C14	100n	100n
C15	100uF	100u
C16	100n	100n
C17	10uF	10u
C18	10uF	10u
C19	100n	100n
Diodes 5
D1	1n914	1N914
D2	1n914	1N914
D3	1n914	1N914
D4	1n4001	1N4001
D5	1n914	1N914
Transistors 1
Q1	2N5087	2N5087
ICs 3
IC1	LM308	LM308
IC2	LM308	LM308
IC3	4558	4558
Potentiometers 3
TONE	100KC	C100k	Potentiometer
GAIN	1MB	B1M	Potentiometer
LVL	1MB	B1M	Potentiometer