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Oberheim PS-1 (PDF)
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Schematic
The schematic is the archived file. Open it at Experimentalists Anonymous, or browse its folder.
Parts list 27 rows
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Check before you build · 1 value the reader of this schematic was not sure of
- 220K/10K in LFO: labels sit between two resistors, read 220K to -15 and 10K to ground
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 9 | ||||
| ×18 | 100k | 100k | all-pass stages; read from the schematic by eye | |
| ×3 | 100K | 100k | read from the schematic by eye | |
| ×12 | 10K | 10k | read from the schematic by eye | |
| ×6 | 4.7K | 4.7k | read from the schematic by eye | |
| ×4 | 33K | 33k | read from the schematic by eye | |
| ×6 | 1M | 1M | read from the schematic by eye | |
| ×1 | 220K | 220k | LFO, to -15; read from the schematic by eye | |
| ×2 | 150K | 150k | read from the schematic by eye | |
| ×2 | 270 | 270 | supply; read from the schematic by eye | |
| Capacitors 5 | ||||
| ×6 | 0.01uF | 10n | all-pass stages; read from the schematic by eye | |
| ×2 | 0.33uF | 330n | read from the schematic by eye | |
| ×1 | 220uF | 220u | read from the schematic by eye | |
| ×1 | 4.7uF | 4.7u | read from the schematic by eye | |
| ×2 | 470uF | 470u | 25V; read from the schematic by eye | |
| Diodes 2 | ||||
| ×4 | 1N4002 | 1N4002 | rectifier; read from the schematic by eye | |
| ×2 | 1N965 | 1N965 / 15V | zener; read from the schematic by eye | |
| Transistors 4 | ||||
| ×4 | 2N3638A | 2N3638A | all bipolars; read from the schematic by eye | |
| ×3 | 2N4302 | 2N4302 | JFET; read from the schematic by eye | |
| ×1 | P1069C | P1069C | JFET; read from the schematic by eye | |
| ×6 | ? | ? | JFET, marked selected, no part number; read from the schematic by eye | |
| ICs 1 | ||||
| ×4 | 1458 | 1458 | dual op amp; read from the schematic by eye | |
| Trimmers 3 | ||||
| DC Offset | 10K | 10k | output offset; read from the schematic by eye | |
| Osc. Ampl. | 10K | 10k | read from the schematic by eye | |
| FET Bias | 10K | 10k | read from the schematic by eye | |
| Switches 3 | ||||
| ×1 | SPDT | SPDT | Off/Slow Phase switch, drawn as single throw; read from the schematic by eye | |
| Medium Phase | SPST | SPST | read from the schematic by eye | |
| Fast Phase | SPST | SPST | read from the schematic by eye | |