Enclosure not stated · 1 knob
Moog 901B
- Category
- Ring Mod / Synth· Oscillators LFOs and Signal Generators
- Controls
- Frequency Vernier
- 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 76 rows
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Check before you build · 2 values the reader of this schematic was not sure of
- P2-P6: drawn as variable resistors with no panel names; taken as trimmers
- S1: six positions inferred from the five range caps plus LO
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 42 | ||||
| R1 | 10 | 10 | 10 ohm; read from the schematic by eye | |
| R2 | 330 | 330 | read from the schematic by eye | |
| R3 | 3.0K | 3k | read from the schematic by eye | |
| R4 | 43K | 43k | read from the schematic by eye | |
| R5 | 18K | 18k | read from the schematic by eye | |
| R6 | 62K | 62k | read from the schematic by eye | |
| R7 | 33K | 33k | read from the schematic by eye | |
| R8 | 1K | 1k | selected for 2.45V at TPA and sine symmetry; read from the schematic by eye | |
| R9 | 1K | 1k | selected for 2.45V AC at TPA and sine symmetry; read from the schematic by eye | |
| R15 | 820 | 820 | read from the schematic by eye | |
| R16 | 3.3K | 3.3k | read from the schematic by eye | |
| R17 | 430 | 430 | read from the schematic by eye | |
| R18 | 2.2K | 2.2k | read from the schematic by eye | |
| R19 | 11K | 11k | read from the schematic by eye | |
| R20 | 10K | 10k | read from the schematic by eye | |
| R21 | 1K | 1k | read from the schematic by eye | |
| R22 | 100 | 100 | read from the schematic by eye | |
| R23 | 750 | 750 | read from the schematic by eye | |
| R24 | 1.8K | 1.8k | read from the schematic by eye | |
| R25 | 10K | 10k | read from the schematic by eye | |
| R26 | ? | ? | no value printed; read from the schematic by eye | |
| R27 | 680 | 680 | read from the schematic by eye | |
| R28 | 100 | 100 | read from the schematic by eye | |
| R29 | 13K | 13k | read from the schematic by eye | |
| R30 | 43K | 43k | read from the schematic by eye | |
| R31 | 22K | 22k | read from the schematic by eye | |
| R32 | 22K | 22k | read from the schematic by eye | |
| R33 | 3.3K | 3.3k | read from the schematic by eye | |
| R34 | 2.7K | 2.7k | read from the schematic by eye | |
| R35 | 3.6K | 3.6k | read from the schematic by eye | |
| R36 | 620 | 620 | read from the schematic by eye | |
| R37 | 18K | 18k | read from the schematic by eye | |
| R38 | 18K | 18k | read from the schematic by eye | |
| R39 | 510 | 510 | read from the schematic by eye | |
| R40 | 510 | 510 | read from the schematic by eye | |
| R41 | 120 | 120 | read from the schematic by eye | |
| R42 | 270 | 270 | read from the schematic by eye | |
| R43 | 120 | 120 | read from the schematic by eye | |
| R44 | 2.4K | 2.4k | read from the schematic by eye | |
| ×1 | 270K | 270k | undesignated, from Tracking trimmer P2; read from the schematic by eye | |
| ×1 | 4.7 | 4.7 | undesignated, in series with S1A wiper; read from the schematic by eye | |
| ×1 | 2.7 | 2.7 | undesignated, -6V supply decoupling; read from the schematic by eye | |
| Capacitors 11 | ||||
| C1 | 100uF | 100u | 25V electrolytic; read from the schematic by eye | |
| C2 | 10uF | 10u | electrolytic, LO range; read from the schematic by eye | |
| C3 | 0.2uF | 200n | 32' range; read from the schematic by eye | |
| C4 | 0.1uF | 100n | read from the schematic by eye | |
| C5 | 0.05uF | 50n | read from the schematic by eye | |
| C6 | 0.025uF | 25n | read from the schematic by eye | |
| C7 | 0.012uF | 12n | 2' range; read from the schematic by eye | |
| C8 | 2.5uF | 2.5u | electrolytic; read from the schematic by eye | |
| C10 | 0.005uF | 5n | read from the schematic by eye | |
| ×1 | .0033uF | 3.3n | undesignated, at Q7 emitter; read from the schematic by eye | |
| ×1 | 400uF | 400u | undesignated electrolytic, -6V supply filter; read from the schematic by eye | |
| Diodes 6 | ||||
| D1 | 1N34 | 1N34 | drawn IN34; read from the schematic by eye | |
| D2 | CL-1 | CL-1 | current-limiter / reference part, drawn CL-1; read from the schematic by eye | |
| D3 | 1N34 | 1N34 | drawn IN34; read from the schematic by eye | |
| D4 | 1N34 | 1N34 | drawn IN34; read from the schematic by eye | |
| D5 | 1N34 | 1N34 | drawn IN34; read from the schematic by eye | |
| D6 | 1N34 | 1N34 | drawn IN34; read from the schematic by eye | |
| Transistors 10 | ||||
| Q1 | 2N3707 | 2N3707 | NPN per note 1 (or 2N2926); read from the schematic by eye | |
| Q2 | 2N3707 | 2N3707 | NPN per note 1 (or 2N2926); read from the schematic by eye | |
| Q3 | 2N3707 | 2N3707 | NPN per note 1 (or 2N2926); read from the schematic by eye | |
| Q4 | 2N3707 | 2N3707 | NPN per note 1 (or 2N2926); read from the schematic by eye | |
| Q5 | 2N3707 | 2N3707 | NPN per note 1 (or 2N2926); read from the schematic by eye | |
| Q6 | 2N3707 | 2N3707 | NPN per note 1 (or 2N2926); read from the schematic by eye | |
| Q7 | 2N3702 | 2N3702 | PNP per note 2, selected; read from the schematic by eye | |
| Q8 | 2N3707 | 2N3707 | NPN per note 1 (or 2N2926); read from the schematic by eye | |
| Q9 | 2N3702 | 2N3702 | PNP per note 2; read from the schematic by eye | |
| Q10 | 2N2646 | 2N2646 | unijunction transistor; read from the schematic by eye | |
| Potentiometers 1 | ||||
| Frequency Vernier | 10K | 10k | Potentiometer | P1A/P1B dual-gang 10K; read from the schematic by eye |
| Trimmers 5 | ||||
| Tracking | 10K | 10k | P2; read from the schematic by eye | |
| P3 | 1K | 1k | read from the schematic by eye | |
| Sawtooth Offset | 10K | 10k | P4; read from the schematic by eye | |
| P5 | 1K | 1k | sine output; read from the schematic by eye | |
| Sine Waveform | 1K | 1k | P6; read from the schematic by eye | |
| Switches 1 | ||||
| S1 | 2P6T | 2P6T | range switch S1A/S1B: LO, 32', 16', 8', 4', 2'; read from the schematic by eye | |