Enclosure not stated
CEM3340 VCO
- Category
- Ring Mod / Synth· Oscillators LFOs and Signal Generators
- Price
- see vendor
- Tags
- Oscillators LFOs and Signal Generators
Schematic
The schematic is the archived file. Open it at Experimentalists Anonymous, or browse its folder.
Parts list 41 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 22 | ||||
| R1 | 27K | 27k | read from the schematic by eye | |
| R3 | 5600 | 5.6k | read from the schematic by eye | |
| R4 | 680 | 680 | drawn 680 ohm; read from the schematic by eye | |
| R5 | 6800 | 6.8k | read from the schematic by eye | |
| R6 | 3900 | 3.9k | read from the schematic by eye | |
| R8 | 5600 | 5.6k | read from the schematic by eye | |
| R9 | 5600 | 5.6k | read from the schematic by eye | |
| R11 | 1M | 1M | FM2 input, crossed out on the drawing; read from the schematic by eye | |
| R12 | 1M | 1M | FM1 input; read from the schematic by eye | |
| R13 | 470 | 470 | drawn 470 ohm, in series with C4; designator R13 is printed twice; read from the schematic by eye | |
| ×1 | 2.2M | 2.2M | second resistor also labelled R13 (designator clash), to the lin scale trimmer; read from the schematic by eye | |
| R14 | 1800 | 1.8k | read from the schematic by eye | |
| R15 | 330K | 330k | to +V; read from the schematic by eye | |
| R16 | 470 | 470 | drawn 470 ohm, in series with C5; read from the schematic by eye | |
| R17 | 51.1K | 51.1k | 1%; 100K crossed out and replaced by 51.1k (CV3); read from the schematic by eye | |
| R18 | 51.1K | 51.1k | 1%; 100K crossed out and replaced by 51.1k (CV2); read from the schematic by eye | |
| R19 | 51.1K | 51.1k | 1%; 100K crossed out and replaced by 51.1k (CV1); read from the schematic by eye | |
| R20 | 680K | 680k | read from the schematic by eye | |
| R23 | 10K | 10k | read from the schematic by eye | |
| ×1 | 100K | 100k | handwritten, coarse input; read from the schematic by eye | |
| ×1 | 1M | 1M | handwritten, fine input; read from the schematic by eye | |
| ×1 | 120K | 120k | handwritten, PW bias divider; read from the schematic by eye | |
| Capacitors 8 | ||||
| C1 | 0.001uF | 1n | drawn .001uf, marked (nc) on hard sync; read from the schematic by eye | |
| C2 | 0.001uF | 1n | drawn .001uf, soft sync; read from the schematic by eye | |
| C3 | 1200pF | 1.2n | polystyrene (POLY), timing cap; read from the schematic by eye | |
| C4 | 0.01uF | 10n | drawn .01uf; read from the schematic by eye | |
| C5 | 1n | 1n | .01uf crossed out and replaced by 1n; read from the schematic by eye | |
| C6 | 33uF | 33u | 33mfd 16V; read from the schematic by eye | |
| C7 | 33uF | 33u | 33mfd 16V; read from the schematic by eye | |
| ×1 | 10uF | 10u | drawn 10µ, PW bias filter; read from the schematic by eye | |
| ICs 2 | ||||
| IC1 | CEM3340 | CEM3340 | VCO; read from the schematic by eye | |
| ×1 | LM358 | LM358 | dual op amp, PW bias buffer; read from the schematic by eye | |
| Potentiometers 2 | ||||
| PW | ? | ? | Potentiometer | panel pulse-width pot, no value given; read from the schematic by eye |
| ×2 | ? | ? | Potentiometer | CV source pot and coarse (0-15V) pot sketched beside the inputs, no values; read from the schematic by eye |
| Trimmers 5 | ||||
| R2 | 10K | 10k | scale adjust; read from the schematic by eye | |
| R7 | 10K | 10k | hi freq track; read from the schematic by eye | |
| ×2 | 200K | 200k | variable resistors on Bus A and Bus B inputs; read from the schematic by eye | |
| ×1 | 50K | 50k | PW bias set (2.5V); read from the schematic by eye | |
| ×1 | ? | ? | lin scale trimmer between -V and +V, no value given; read from the schematic by eye | |
| Switches 2 | ||||
| ×2 | SPST | SPST | Bus A and Bus B input switches; read from the schematic by eye | |
| ×1 | SPDT | SPDT | FM1 source: Bus C or +2.5V; read from the schematic by eye | |