Enclosure not stated
Univibe
Based on the Shin-ei Uni-Vibe· 11 other boards clone it
- Category
- Vibrato / Chorus· Vibrato and Pitch Shift
- Price
- see vendor
- Tags
- Vibrato and Pitch Shift
Schematic
The schematic is the archived file. Open it at Experimentalists Anonymous, or browse its folder.
Parts list 47 rows
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Check before you build · 4 values the reader of this schematic was not sure of
- unlabelled resistor in the lamp driver emitter: no value drawn
- 4.7nF stage cap: drawn '4N7uF'
- 220uF supply caps: drawn '220' with polarity marks
- 50k: could be a trimmer rather than a panel pot
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 25 | ||||
| ×2 | 22K | 22k | input jacks; read from the schematic by eye | |
| ×1 | 47k | 47k | input bias to ground; read from the schematic by eye | |
| ×1 | 100K | 100k | preamp B+ dropper; read from the schematic by eye | |
| ×2 | 1.2M | 1.2M | preamp bias and feedback; read from the schematic by eye | |
| ×1 | 47K | 47k | preamp collector; read from the schematic by eye | |
| ×1 | 4.7K | 4.7k | preamp collector; read from the schematic by eye | |
| ×1 | 3.3K | 3.3k | preamp emitter; read from the schematic by eye | |
| ×1 | 6.8k | 6.8k | preamp emitter; read from the schematic by eye | |
| ×1 | 1.2K | 1.2k | preamp emitter; read from the schematic by eye | |
| ×7 | 100k | 100k | phase stages: three base-bias from B+, four base to ground; read from the schematic by eye | |
| ×1 | 68k | 68k | last stage base bias; read from the schematic by eye | |
| ×10 | 4k7 | 4.7k | phase stages: collectors, emitters and LDR series; read from the schematic by eye | |
| ×4 | 47k | 47k | phase stage emitters; read from the schematic by eye | |
| ×1 | 22k | 22k | output emitter follower; read from the schematic by eye | |
| ×2 | 100k | 100k | output mix: series and to ground; read from the schematic by eye | |
| ×2 | 47k | 47k | output mix; read from the schematic by eye | |
| ×1 | 220k | 220k | output mix; read from the schematic by eye | |
| ×1 | 3.3k | 3.3k | LFO; read from the schematic by eye | |
| ×1 | 2.2M | 2.2M | LFO; read from the schematic by eye | |
| ×4 | 4.7k | 4.7k | LFO: base to ground, two in phase-shift network, emitter; read from the schematic by eye | |
| ×2 | 220k | 220k | LFO phase-shift network; read from the schematic by eye | |
| ×2 | 47k | 47k | lamp driver base; read from the schematic by eye | |
| ×1 | 100k | 100k | lamp driver; read from the schematic by eye | |
| ×1 | ? | ? | lamp driver emitter below the 1k trim; value not drawn; read from the schematic by eye | |
| ×2 | 470 | 470 | supply filter; read from the schematic by eye | |
| Capacitors 11 | ||||
| ×5 | 1uF | 1u | preamp: B+ filter, input coupling, emitter bypass, output to phase stages and to output; read from the schematic by eye | |
| ×1 | 330pF | 330p | preamp; read from the schematic by eye | |
| ×1 | 15nF | 15n | phase stage 1; read from the schematic by eye | |
| ×1 | 220nF | 220n | phase stage 2; read from the schematic by eye | |
| ×1 | 470nF | 470n | phase stage 3; read from the schematic by eye | |
| ×1 | 4.7nF | 4.7n | phase stage 4; drawn '4N7uF'; read from the schematic by eye | |
| ×8 | 1uF | 1u | phase stages coupling and output, electrolytic; read from the schematic by eye | |
| ×3 | 1uF | 1u | LFO, electrolytic; read from the schematic by eye | |
| ×2 | 10uF | 10u | LFO to lamp driver, electrolytic; read from the schematic by eye | |
| ×2 | 220uF | 220u | supply filter, drawn '220'; read from the schematic by eye | |
| ×1 | 1000uF | 1m | supply filter; read from the schematic by eye | |
| Diodes 2 | ||||
| ×2 | Diode | DIODE | LFO clamp; no part number given; read from the schematic by eye | |
| ×1 | Diode | DIODE | supply rectifier; no part number given; read from the schematic by eye | |
| Transistors 2 | ||||
| ×1 | 2SC539 | 2SC539 | input transistor; read from the schematic by eye | |
| ×12 | 2SC828 | 2SC828 | all other NPN transistors; read from the schematic by eye | |
| Opto 1 | ||||
| ×1 | MXY-7BX4 | MXY-7BX4 | CdS module: four LDRs and an incandescent lamp; read from the schematic by eye | |
| Potentiometers 3 | ||||
| Speed | 250k | 250k | Potentiometer | dual-gang, in the pedal assembly; read from the schematic by eye |
| ×1 | 100k | 100k | Potentiometer | output level, unnamed; read from the schematic by eye |
| ×1 | 50k | 50k | Potentiometer | intensity/depth to the lamp driver, unnamed; read from the schematic by eye |
| Trimmers 1 | ||||
| ×1 | 1k | 1k | lamp driver bias; read from the schematic by eye | |
| Switches 2 | ||||
| Chorus/Vibrato | SPDT | SPDT | read from the schematic by eye | |
| Cancel | SPST | SPST | stops the LFO; drawn as a pushbutton contact; read from the schematic by eye | |
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