Enclosure not stated · 5 knobs

VHT MK / SLO100 JFET-MosFET Guitar preamp

Category: Preamp / Amp-in-a-box
Controls: Drive · Treble · Bass · Mid · Volume
Price: see vendorin stock
Tags: Guitar preamp

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Schematic

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

Parts list 58 rows

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Variant

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

Modern SLO 100 R20: designator printed twice (33k and 47k), both listed

Ref	Value	Normalized	Type	Notes
Resistors 26
R1	1M	1M		read from the schematic by eye
R2	68k	68k		read from the schematic by eye
R3	22k	22k		22k*: select for about +4V at V1 drain; read from the schematic by eye
R4	1k5	1.5k		read from the schematic by eye
R5	68k	68k		read from the schematic by eye
R6	1k	1k		read from the schematic by eye
R7	47k	47k		read from the schematic by eye
R8	33k	33k		read from the schematic by eye
R9	33k	33k		read from the schematic by eye
R10	56k	56k		read from the schematic by eye
R11	43k	43k		read from the schematic by eye
R12	33k	33k		read from the schematic by eye
R13	220k	220k		read from the schematic by eye
R14	2k	2k		read from the schematic by eye
R15	100k	100k		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	33k	33k		read from the schematic by eye
R19	56k	56k		read from the schematic by eye
R20	43k	43k		read from the schematic by eye
R21	47k	47k		read from the schematic by eye
R22	24k	24k		read from the schematic by eye
R23	24k	24k		read from the schematic by eye
R24	47k	47k		read from the schematic by eye
R25	10k	10k		read from the schematic by eye
R26	1M	1M		read from the schematic by eye
Capacitors 19
C1	100u	100u		read from the schematic by eye
C2	100p	100p		read from the schematic by eye
C3	220n	220n		read from the schematic by eye
C4	1u	1u		read from the schematic by eye
C5	22n	22n		read from the schematic by eye
C6	470p	470p		read from the schematic by eye
C7	47n	47n		read from the schematic by eye
C8	22n	22n		read from the schematic by eye
C9	100u	100u		read from the schematic by eye
C10	100p	100p		read from the schematic by eye
C11	22n	22n		read from the schematic by eye
C12	470p	470p		read from the schematic by eye
C13	2u2	2.2u		read from the schematic by eye
C14	100u	100u		read from the schematic by eye
C15	100u	100u		read from the schematic by eye
C16	470p	470p		read from the schematic by eye
C17	22n	22n		read from the schematic by eye
C18	22n	22n		read from the schematic by eye
C19	470n	470n		read from the schematic by eye
Diodes 2
D1	1N4148	1N4148		read from the schematic by eye
D2	1N4148	1N4148		read from the schematic by eye
Transistors 6
V1	KP303A	KP303A		KP303 is the Soviet КП303 JFET; read from the schematic by eye
V2	2N7000	2N7000		read from the schematic by eye
V3	KP303A	KP303A		KP303 is the Soviet КП303 JFET; read from the schematic by eye
V4	2N7000	2N7000		read from the schematic by eye
V5	KP303E	KP303E		KP303 is the Soviet КП303 JFET; read from the schematic by eye
V6	KP303E	KP303E		KP303 is the Soviet КП303 JFET; read from the schematic by eye
Potentiometers 5
Drive	A100k	A100k	Potentiometer	read from the schematic by eye
Treble	A220k	A220k	Potentiometer	read from the schematic by eye
Bass	B1M	B1M	Potentiometer	read from the schematic by eye
Mid	A22k	A22k	Potentiometer	read from the schematic by eye
Volume	B1M	B1M	Potentiometer	read from the schematic by eye