Enclosure not stated
Dual 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 26 rows
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Check before you build · 2 values the reader of this schematic was not sure of
- 40 resistors, 14 capacitors and all 6 trimmers have no value on the drawing
- CA3046: two packages per core assumed since both are drawn as section A
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 8 | ||||
| ×16 | 100K | 100k | 8 per VCO core; read from the schematic by eye | |
| ×4 | 49.9K | 49.9k | 2 per VCO core; read from the schematic by eye | |
| ×2 | 24.9K | 24.9k | 1 per VCO core; read from the schematic by eye | |
| ×2 | 200K | 200k | 1 per VCO core; read from the schematic by eye | |
| ×2 | 4.99K | 4.99k | 1 per VCO core; read from the schematic by eye | |
| ×2 | 499 | 499 | 1 per VCO core; read from the schematic by eye | |
| ×4 | 200 | 200 | 2 per VCO core, THAT140 emitters; read from the schematic by eye | |
| ×40 | ? | ? | 20 per VCO core drawn as 'R' with no value (input mixer, expo converter, comparator, outputs); read from the schematic by eye | |
| Capacitors 2 | ||||
| ×12 | ? | ? | 6 per VCO core drawn as 'CAP' with no value (timing/integrator caps and supply decoupling); read from the schematic by eye | |
| ×2 | ? | ? | polarized supply caps on the edge-connector sheet, no value; read from the schematic by eye | |
| Diodes 1 | ||||
| ×10 | 1N914 | 1N914 | 5 per VCO core; read from the schematic by eye | |
| Transistors 1 | ||||
| ×4 | 2N3906 | 2N3906 | 2 per VCO core; read from the schematic by eye | |
| ICs 8 | ||||
| ×4 | CA3046 | CA3046 | transistor array, two drawn per VCO core (both as Q?A, pins 1-5); read from the schematic by eye | |
| ×2 | THAT140 | THAT140 | matched transistor array, one per VCO core; read from the schematic by eye | |
| ×2 | LF347 | LF347 | quad op amp, one per VCO core; read from the schematic by eye | |
| ×2 | LF353 | LF353 | dual op amp, one per VCO core; read from the schematic by eye | |
| ×2 | CA3140 | CA3140 | one per VCO core; read from the schematic by eye | |
| ×2 | LM311 | LM311 | comparator, one per VCO core; read from the schematic by eye | |
| ×4 | LM336 | LM336 | 2.5V reference, two per VCO core; read from the schematic by eye | |
| ×1 | LM13700 | LM13700 | dual OTA shared: section A in VCO1, section B in VCO2; read from the schematic by eye | |
| Trimmers 6 | ||||
| VCO1 Scale | ? | ? | no value drawn; read from the schematic by eye | |
| VCO1 High Freq Track | ? | ? | no value drawn; read from the schematic by eye | |
| VCO1 Ref | ? | ? | pot across the LM336 reference, unnamed, no value drawn; read from the schematic by eye | |
| VCO2 Scale | ? | ? | no value drawn; read from the schematic by eye | |
| VCO2 High Freq Track | ? | ? | no value drawn; read from the schematic by eye | |
| VCO2 Ref | ? | ? | pot across the LM336 reference, unnamed, no value drawn; read from the schematic by eye | |