Enclosure not stated · 3 knobs

Electro Harmonix Clone Theory MN3007

Based on the Electro-Harmonix Clone Theory MN3007

Category: Vibrato / Chorus· Chorus
Controls: Ch/Vib · Rate · Depth
Price: see vendor
Tags: Chorus

Open the schematic at Experimentalists Anonymous

Schematic

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Parts list 71 rows

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Check before you build · 2 values the reader of this schematic was not sure of

D1/D2: drawn 1N4301, probably 1N4001
D3: drawn 1N9658, unclear zener part number

Ref	Value	Normalized	Type	Notes
Resistors 33
R1	1M	1M		read from the schematic by eye
R3	100k	100k		read from the schematic by eye
R4	390k	390k		read from the schematic by eye
R5	10k	10k		read from the schematic by eye
R6	2M2	2.2M		read from the schematic by eye
R8	100k	100k		read from the schematic by eye
R9	6k8	6.8k		read from the schematic by eye
R10	2k4	2.4k		read from the schematic by eye
R11	2k4	2.4k		read from the schematic by eye
R13	200k	200k		read from the schematic by eye
R14	200k	200k		read from the schematic by eye
R15	100k	100k		read from the schematic by eye
R16	51k	51k		read from the schematic by eye
R17	150k	150k		drawn with an odd hatched body, possibly a selected part; read from the schematic by eye
R18	150k	150k		read from the schematic by eye
R19	330	330		read from the schematic by eye
R20	1k1	1.1k		read from the schematic by eye
R21	82k	82k		read from the schematic by eye
R22	82k	82k		read from the schematic by eye
R23	100k	100k		read from the schematic by eye
R24	300k	300k		read from the schematic by eye
R25	300k	300k		read from the schematic by eye
R26	51k	51k		read from the schematic by eye
R28	12k	12k		read from the schematic by eye
R29	12k	12k		read from the schematic by eye
R31	68k	68k		read from the schematic by eye
R32	120k	120k		read from the schematic by eye
R33	100k	100k		read from the schematic by eye
R34	100k	100k		read from the schematic by eye
R35	62k	62k		read from the schematic by eye
R36	22k	22k		read from the schematic by eye
R37	330k	330k		read from the schematic by eye
R38	470	470		original power supply; read from the schematic by eye
Capacitors 24
C1	0.1uF	100n		read from the schematic by eye
C2	4.7uF	4.7u		electrolytic; read from the schematic by eye
C3	27p	27p		read from the schematic by eye
C4	0.022uF	22n		read from the schematic by eye
C5	0.1uF	100n		read from the schematic by eye
C6	0.1uF	100n		read from the schematic by eye
C7	2n2	2.2n		read from the schematic by eye
C8	0.022uF	22n		read from the schematic by eye
C9	1.0uF	1u		electrolytic; read from the schematic by eye
C10	680p	680p		read from the schematic by eye
C11	680p	680p		read from the schematic by eye
C12	1.0uF	1u		electrolytic; read from the schematic by eye
C13	0.1uF	100n		read from the schematic by eye
C14	3n3	3.3n		read from the schematic by eye
C15	0.15uF	150n		read from the schematic by eye
C16	4.7uF	4.7u		electrolytic; read from the schematic by eye
C17	0.22uF	220n		read from the schematic by eye
C18	27p	27p		read from the schematic by eye
C19	1.0uF	1u		electrolytic; read from the schematic by eye
C20	0.22uF	220n		read from the schematic by eye
C21	1.0uF	1u		electrolytic; read from the schematic by eye
C22	620p	620p		read from the schematic by eye
C23	470uF	470u		electrolytic, original power supply; read from the schematic by eye
C24	470uF	470u		electrolytic, original power supply; read from the schematic by eye
Diodes 3
D1	1N4301	1N4301		as drawn (likely 1N4001), original power supply; read from the schematic by eye
D2	1N4301	1N4301		as drawn (likely 1N4001), original power supply; read from the schematic by eye
D3	1N9658	1N9658		zener, as drawn, original power supply; read from the schematic by eye
Transistors 1
Q1	2N4302	2N4302		N-JFET; read from the schematic by eye
ICs 4
IC1	?	?		dual op amp, no part number given; read from the schematic by eye
IC2	?	?		dual op amp, no part number given; read from the schematic by eye
×1	MN3007	MN3007		BBD, no designator drawn; read from the schematic by eye
×1	CD4047	CD4047		clock, no designator drawn; read from the schematic by eye
Potentiometers 3
Ch/Vib	B10K	B10k	Potentiometer	R2, 10k-lin; read from the schematic by eye
Rate	1M	1M	Potentiometer	R30, 1M ccw (reverse) log; read from the schematic by eye
Depth	B100K	B100k	Potentiometer	R27, 100k-lin; read from the schematic by eye
Trimmers 2
Bias	100k	100k		R7, 100k-trim; read from the schematic by eye
Gain	100k	100k		R12, 100k-trim; read from the schematic by eye
Switches 1
S1	DPDT	DPDT		chorus/vibrato - vibraflange; read from the schematic by eye