Enclosure not stated · 4 knobs

Korg Tone Booster

Based on the Korg TNB-1 Tone Booster· 3 other boards clone it

Category: Boost· Tone Control and EQs
Controls: Gain · Treble · Bass · Out Level
Price: see vendor
Tags: Tone Control and EQs

Open the schematic at Experimentalists Anonymous

Schematic

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Parts list 48 rows

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Check before you build · 1 value the reader of this schematic was not sure of

D2: legend reads SRIK 2, probably SR1K-2

Ref	Value	Normalized	Type	Notes
Resistors 22
R1	100K	100k		read from the schematic by eye
R2	1M	1M		read from the schematic by eye
R3	1K	1k		read from the schematic by eye
R4	1.2K	1.2k		read from the schematic by eye
R5	1.8K	1.8k		read from the schematic by eye
R6	10K	10k		read from the schematic by eye
R7	100K	100k		read from the schematic by eye
R8	330K	330k		read from the schematic by eye
R9	4.7M	4.7M		read from the schematic by eye
R10	1M	1M		read from the schematic by eye
R11	10K	10k		read from the schematic by eye
R12	22K	22k		read from the schematic by eye
R13	1M	1M		read from the schematic by eye
R14	100K	100k		read from the schematic by eye
R15	10K	10k		read from the schematic by eye
R16	10K	10k		read from the schematic by eye
R17	330K	330k		read from the schematic by eye
R18	1.2K	1.2k		read from the schematic by eye
R19	10K	10k		read from the schematic by eye
R20	10K	10k		read from the schematic by eye
R21	470	470		drawn 470Ω; read from the schematic by eye
R22	47K	47k		read from the schematic by eye
Capacitors 13
C1	100uF	100u		16V electrolytic; read from the schematic by eye
C2	0.047uF	47n		read from the schematic by eye
C3	1uF	1u		50V electrolytic, marked MS; read from the schematic by eye
C4	220pF	220p		drawn 220p; read from the schematic by eye
C5	0.022uF	22n		read from the schematic by eye
C6	0.1uF	100n		marked MS; read from the schematic by eye
C7	0.022uF	22n		read from the schematic by eye
C8	10uF	10u		16V electrolytic; read from the schematic by eye
C9	0.022uF	22n		read from the schematic by eye
C10	1uF	1u		50V electrolytic; read from the schematic by eye
C11	10uF	10u		16V electrolytic; read from the schematic by eye
C12	0.068uF	68n		read from the schematic by eye
C13	10uF	10u		16V electrolytic; read from the schematic by eye
Diodes 4
D1	1S1555	1S1555		per the drawing's note: diodes without designation are 1S1555; read from the schematic by eye
D2	SR1K-2	SR1K-2		drawn SRIK 2; polarity-protection diode; read from the schematic by eye
D3	1S1555	1S1555		no type drawn beside it; per the drawing's note; read from the schematic by eye
D6	RD5.6EB1	RD5.6EB1		5.6V zener; read from the schematic by eye
Transistors 3
Q1	2SK30A(O)	2SK30A(O)		JFET switch (marked MS); read from the schematic by eye
Q2	2SK30A(O)	2SK30A(O)		JFET input buffer; read from the schematic by eye
Q3	2SC2785K	2SC2785K		drawn C2785K; read from the schematic by eye
ICs 1
IC1	TL072	TL072		drawn TL-072; read from the schematic by eye
Potentiometers 4
Gain	C1M	C1M	Potentiometer	drawn 1MC (C taper); read from the schematic by eye
Treble	B200K	B200k	Potentiometer	drawn 200KB; read from the schematic by eye
Bass	A200K	A200k	Potentiometer	drawn 200KA; read from the schematic by eye
Out Level	B10K	B10k	Potentiometer	drawn 10KB; read from the schematic by eye
LEDs 1
LED	PR5534S	PR5534S		status LED, no designator; read from the schematic by eye

Other boards based on the Korg TNB-1 Tone Booster

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Korg TNB-1 Tone Booster Tagboard Effects