Enclosure not stated · 4 knobs

Shin-ei Uni-Vibe

Based on the Shin-ei Uni-Vibe· 11 other boards clone it

Category: Vibrato / Chorus
Controls: Volume · Chorus/Vibrato · Speed · Intensity
Price: see vendor

Read the post at Revolution Deux Schematic image Original schematic GeoFex: The Technology of the Univibe Forum Vibe project GeoFex NeoVibe update General Guitar Gadgets NeoVibe

From the vendor

The classic Uni-Vibe: a four-stage phase shifter built from discrete transistor stages, with mismatched phase-shift capacitors and four LDRs lit by an incandescent lamp. Its phase-shift-oscillator LFO gives a skewed, asymmetric sine wave and the famous throbbing pulse. The post points to the Forum Vibe and NeoVibe projects as ways to build a close replica.

The post recommends the Forum Vibe 'Mods' version (easier to tune in) or the NeoVibe as a close replica of the original.

Schematic

The schematic is in the post. Open it at Revolution Deux. No KiCad fragment has been drawn for this circuit yet.

Parts list 97 rows

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

The drawing prints alternate values in gray beside some parts (R1 22k, C4 n33, C6 15n, C8 22n, C11 n47, C14 4n7); C8 is .22u in black but 22n in gray, so check which you want.
The redraw does not name the transistors; the Univox factory schematic (image 3) gives 2SC828 for all except Q1, a 2SC539.

Ref	Value	Normalized	Type	Notes
Resistors 49
R1	27K	27k		gray 22k beside it; read from the schematic by eye
R2	47K	47k		read from the schematic by eye
R3	1.2M	1.2M		read from the schematic by eye
R4	1.2M	1.2M		read from the schematic by eye
R5	100K	100k		read from the schematic by eye
R6	47K	47k		read from the schematic by eye
R7	6.8K	6.8k		read from the schematic by eye
R8	4.7K	4.7k		read from the schematic by eye
R9	3.6K	3.6k		read from the schematic by eye
R10	1.2K	1.2k		read from the schematic by eye
R11	4.7K	4.7k		read from the schematic by eye
R12	100K	100k		read from the schematic by eye
R13	100K	100k		read from the schematic by eye
R14	47K	47k		read from the schematic by eye
R15	4.7K	4.7k		read from the schematic by eye
R16	4.7K	4.7k		read from the schematic by eye
R17	4.7K	4.7k		read from the schematic by eye
R18	100K	100k		read from the schematic by eye
R19	100K	100k		read from the schematic by eye
R20	47K	47k		read from the schematic by eye
R21	4.7K	4.7k		read from the schematic by eye
R22	4.7K	4.7k		read from the schematic by eye
R23	4.7K	4.7k		read from the schematic by eye
R24	100K	100k		read from the schematic by eye
R25	100K	100k		read from the schematic by eye
R26	47K	47k		read from the schematic by eye
R27	4.7K	4.7k		read from the schematic by eye
R28	4.7K	4.7k		read from the schematic by eye
R29	4.7K	4.7k		read from the schematic by eye
R30	100K	100k		read from the schematic by eye
R31	68K	68k		read from the schematic by eye
R32	47K	47k		read from the schematic by eye
R33	22K	22k		read from the schematic by eye
R34	100K	100k		read from the schematic by eye
R35	100K	100k		read from the schematic by eye
R36	47K	47k		read from the schematic by eye
R37	220K	220k		read from the schematic by eye
R38	3.3K	3.3k		read from the schematic by eye
R39	4.7K	4.7k		read from the schematic by eye
R40	2.2M	2.2M		read from the schematic by eye
R41	220K	220k		read from the schematic by eye
R42	220K	220k		read from the schematic by eye
R43	2.2K-4.7K	2.2k-4.7k		read from the schematic by eye
R44	2.2K-4.7K	2.2k-4.7k		read from the schematic by eye
R45	4.7K	4.7k		read from the schematic by eye
R46	4.7K	4.7k		read from the schematic by eye
R48	100K	100k		read from the schematic by eye
R49	47K	47k		read from the schematic by eye
R47	150	150		read from the schematic by eye
Capacitors 23
C1	1u	1u		electrolytic; read from the schematic by eye
C2	1u	1u		electrolytic; read from the schematic by eye
C3	1u	1u		electrolytic; read from the schematic by eye
C4	330p	330p		read from the schematic by eye
C5	1u	1u		electrolytic; read from the schematic by eye
C6	15n	15n		.015uF; read from the schematic by eye
C7	1u	1u		electrolytic; read from the schematic by eye
C8	220n	220n		.22uF; gray 22n beside it; read from the schematic by eye
C9	1u	1u		electrolytic; read from the schematic by eye
C10	1u	1u		electrolytic; read from the schematic by eye
C11	470p	470p		read from the schematic by eye
C12	1u	1u		electrolytic; read from the schematic by eye
C13	1u	1u		electrolytic; read from the schematic by eye
C14	4.7n	4.7n		.0047uF; read from the schematic by eye
C15	1u	1u		electrolytic; read from the schematic by eye
C16	1u	1u		electrolytic; read from the schematic by eye
C17	1u	1u		electrolytic; read from the schematic by eye
C18	1u	1u		electrolytic; read from the schematic by eye
C19	1u	1u		read from the schematic by eye
C20	1u	1u		read from the schematic by eye
C21	1u	1u		read from the schematic by eye
C22	10u	10u		electrolytic; read from the schematic by eye
C23	10u	10u		electrolytic; 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 13
Q1	2SC539	2SC539		from the Univox schematic; read from the schematic by eye
Q2	2SC828	2SC828		read from the schematic by eye
Q3	2SC828	2SC828		read from the schematic by eye
Q4	2SC828	2SC828		read from the schematic by eye
Q5	2SC828	2SC828		read from the schematic by eye
Q6	2SC828	2SC828		read from the schematic by eye
Q7	2SC828	2SC828		read from the schematic by eye
Q8	2SC828	2SC828		read from the schematic by eye
Q9	2SC828	2SC828		read from the schematic by eye
Q10	2SC828	2SC828		read from the schematic by eye
Q11	2SC828	2SC828		read from the schematic by eye
Q12	2SC828	2SC828		read from the schematic by eye
Q13	2SC828	2SC828		lamp driver; read from the schematic by eye
Potentiometers 4
Volume	100K	100k	Potentiometer	VR3; read from the schematic by eye
Speed	C100K	C100k	Potentiometer, dual	VR1; read from the schematic by eye
Intensity	B50K	B50k	Potentiometer	VR2, linear; read from the schematic by eye
TR1	500	500	Potentiometer	trimmer, lamp bias; read from the schematic by eye
Switches 1
Chorus/Vibrato	SPDT	SPDT		read from the schematic by eye
Other 5
LDR1	LDR	LDR		CdS cell, MKY-78; read from the schematic by eye
LDR2	LDR	LDR		CdS cell; read from the schematic by eye
LDR3	LDR	LDR		CdS cell; read from the schematic by eye
LDR4	LDR	LDR		CdS cell; read from the schematic by eye
Lamp	incandescent lamp	INCANDESCENT LAMP		lights the four LDRs; read from the schematic by eye

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