Enclosure not stated · 1 knob
Tube Theremin
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- Ring Mod / Synth· Full Synths Drum Synths and Misc Synth
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- Full Synths Drum Synths and Misc Synth
Schematic
The schematic is the archived file. Open it at Experimentalists Anonymous, or browse its folder.
Parts list 24 rows
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Check before you build · 2 values the reader of this schematic was not sure of
- V3 cathode resistor: no value drawn
- Oscillator coils: no inductance given
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 4 | ||||
| ×6 | 1M | 1M | grid resistors; read from the schematic by eye | |
| ×2 | 470K | 470k | plate loads V2b, V3a; read from the schematic by eye | |
| ×2 | 1K | 1k | V2b cathode; B+ supply dropper; read from the schematic by eye | |
| ×1 | ? | ? | V3a/V3b shared cathode resistor, no value drawn; read from the schematic by eye | |
| Capacitors 10 | ||||
| ×3 | 220pF | 220p | oscillator grid caps; read from the schematic by eye | |
| ×1 | 150pF | 150p | pitch oscillator V1 tank; read from the schematic by eye | |
| ×2 | 150pF | 150p | variable (trimmer) caps: V2a tank, volume tuning tank; read from the schematic by eye | |
| ×1 | 33pF | 33p | V1 tank; read from the schematic by eye | |
| ×5 | 15pF | 15p | oscillator couplings, volume detector coupling, one in parallel with the volume tank; read from the schematic by eye | |
| ×1 | 22pF | 22p | in parallel with volume tank (15pF + 22pF); read from the schematic by eye | |
| ×1 | 47pF | 47p | V4a tank; read from the schematic by eye | |
| ×2 | 0.1uF | 100n | drawn .1uf: mixer coupling, output; read from the schematic by eye | |
| ×2 | 10nF | 10n | mixer filtering; read from the schematic by eye | |
| ×3 | 20uF | 20u | 300V filter caps, B+ supply; read from the schematic by eye | |
| Diodes 2 | ||||
| ×2 | 1N4148 | 1N4148 | drawn as one with (2): volume detector; read from the schematic by eye | |
| ×3 | 82V | 82V | 1W zeners in series, B+ regulator; read from the schematic by eye | |
| Inductors 2 | ||||
| ×4 | ? | ? | tapped oscillator coils, no value given; read from the schematic by eye | |
| ×1 | 5H | 5H | B+ filter choke; read from the schematic by eye | |
| Potentiometers 1 | ||||
| Volume | 100K | 100k | Potentiometer | read from the schematic by eye |
| Other 5 | ||||
| V1 | 12AU7 | 12AU7 | vacuum tube, one triode used (pitch osc); read from the schematic by eye | |
| V2 | 12AU7 | 12AU7 | vacuum tube: variable pitch osc + mixer; read from the schematic by eye | |
| V3 | 12AU7 | 12AU7 | vacuum tube: VCA/output; read from the schematic by eye | |
| V4 | 12AU7 | 12AU7 | vacuum tube, V4a volume osc; read from the schematic by eye | |
| ×1 | 6X4 | 6X4 | rectifier tube; read from the schematic by eye | |