Enclosure not stated · 2 knobs
Morley POB
Based on the Morley POB
Schematic
The schematic is the archived file. Open it at Experimentalists Anonymous, or browse its folder.
Parts list 41 rows
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Check before you build · 3 values the reader of this schematic was not sure of
- 68pF input cap: first digit faint, reads 68
- 330K LFO resistor: handwriting could be 820K
- 350K trim value faint
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 17 | ||||
| ×14 | 10K | 10k | incl. 8 in the phase stages and one at the output jack; read from the schematic by eye | |
| ×4 | 12K | 12k | read from the schematic by eye | |
| ×3 | 470K | 470k | read from the schematic by eye | |
| ×2 | 2.2K | 2.2k | input series; LED; read from the schematic by eye | |
| ×1 | 8.2K | 8.2k | read from the schematic by eye | |
| ×1 | 3.3K | 3.3k | read from the schematic by eye | |
| ×1 | 15K | 15k | read from the schematic by eye | |
| ×1 | 100 | 100 | output jack divider, off board; read from the schematic by eye | |
| ×4 | 220K | 220k | phase stages; read from the schematic by eye | |
| ×2 | 22K | 22k | 4.5 V bias divider; read from the schematic by eye | |
| ×2 | 2.2M | 2.2M | LFO; read from the schematic by eye | |
| ×1 | 1M | 1M | LFO; read from the schematic by eye | |
| ×1 | 6.8K | 6.8k | LFO; read from the schematic by eye | |
| ×1 | 390K | 390k | LFO; read from the schematic by eye | |
| ×1 | 330K | 330k | LFO; read from the schematic by eye | |
| ×1 | 68K | 68k | LFO; read from the schematic by eye | |
| ×3 | 1K | 1k | LED drive and indicator; read from the schematic by eye | |
| Capacitors 11 | ||||
| ×5 | .01uF | 10n | input and phase stages; read from the schematic by eye | |
| ×1 | 68pF | 68p | input to ground; read from the schematic by eye | |
| ×1 | .022uF | 22n | read from the schematic by eye | |
| ×2 | 1uF | 1u | electrolytic, output; read from the schematic by eye | |
| ×1 | .0015uF | 1.5n | read from the schematic by eye | |
| ×3 | .047uF | 47n | op amp supply bypass, recirculation, regulator output; read from the schematic by eye | |
| ×2 | .1uF | 100n | regulator input; LFO; read from the schematic by eye | |
| ×1 | 10uF | 10u | electrolytic, bias; read from the schematic by eye | |
| ×1 | .001uF | 1n | LFO; read from the schematic by eye | |
| ×1 | 4.7uF | 4.7u | LFO, drawn non-polar (+ +); read from the schematic by eye | |
| ×1 | 1.0uF | 1u | electrolytic, LFO; read from the schematic by eye | |
| Diodes 1 | ||||
| ×1 | 1N4003 | 1N4003 | DC input; read from the schematic by eye | |
| Transistors 1 | ||||
| ×1 | MPS-A12 | MPSA12 | Darlington LED driver; read from the schematic by eye | |
| ICs 4 | ||||
| A | TL074 | TL074 | read from the schematic by eye | |
| B | TL074 | TL074 | read from the schematic by eye | |
| ×1 | 1458 | 1458 | LFO, both sections; read from the schematic by eye | |
| ×1 | 78L09 | 78L09 | regulator; read from the schematic by eye | |
| Opto 1 | ||||
| LDR1-4 | VT-912 | VT-912 | Coarse grid VT-912; read from the schematic by eye | |
| Potentiometers 2 | ||||
| Speed | 1M | 1M | Potentiometer | reverse audio taper; read from the schematic by eye |
| Recirculation | 100K | 100k | Potentiometer | read from the schematic by eye |
| Trimmers 2 | ||||
| Recirculation Trim | 25K | 25k | read from the schematic by eye | |
| ×1 | 350K | 350k | LFO bias/sweep trim, unlabeled; read from the schematic by eye | |
| LEDs 2 | ||||
| LED1-4 | OPL-209-103 | OPL-209-103 | OPCOA, paired with LDR1-4; read from the schematic by eye | |
| ×2 | LED | LED | red status LEDs (RD), no part number; read from the schematic by eye | |