Enclosure not stated · 2 knobs
Mu-Tron3
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- Other· Filters Wahs and VCFs
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- Filters Wahs and VCFs
Schematic
The schematic is the archived file. Open it at Experimentalists Anonymous, or browse its folder.
Parts list 47 rows
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Check before you build · 3 values the reader of this schematic was not sure of
- R5: reads 1.7k, could be 4.7k
- C8 (4.7uF): designator printed twice
- Gain taper: CCW log
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 21 | ||||
| R1 | 3.3k | 3.3k | read from the schematic by eye | |
| R3 | 120k | 120k | read from the schematic by eye | |
| R4 | 120k | 120k | read from the schematic by eye | |
| R5 | 1.7k | 1.7k | as drawn; could be 4.7k; read from the schematic by eye | |
| R6 | 12k | 12k | read from the schematic by eye | |
| R7 | 22k | 22k | read from the schematic by eye | |
| R8 | 22k | 22k | read from the schematic by eye | |
| R10 | 220k | 220k | read from the schematic by eye | |
| R12 | 220k | 220k | read from the schematic by eye | |
| R13 | 22k | 22k | read from the schematic by eye | |
| R14 | 12k | 12k | read from the schematic by eye | |
| R15 | 1 Meg | 1M | read from the schematic by eye | |
| R16 | 1 Meg | 1M | read from the schematic by eye | |
| R17 | 330Ω | 330 | read from the schematic by eye | |
| R18 | 47k | 47k | read from the schematic by eye | |
| R19 | 180k | 180k | read from the schematic by eye | |
| R20 | 120k | 120k | read from the schematic by eye | |
| R21 | 120k | 120k | read from the schematic by eye | |
| R22 | 120k | 120k | read from the schematic by eye | |
| R23 | ? | ? | value depends on the characteristics of the 0805 opto (select on test); read from the schematic by eye | |
| R25 | 560Ω | 560 | read from the schematic by eye | |
| Capacitors 14 | ||||
| C1 | 4.7uF | 4.7u | electrolytic; read from the schematic by eye | |
| C2 | 0.1uF | 100n | read from the schematic by eye | |
| C3 | 10pF | 10p | read from the schematic by eye | |
| C4 | 2200pF | 2.2n | read from the schematic by eye | |
| C5 | 1800pF | 1.8n | read from the schematic by eye | |
| C6 | 2200pF | 2.2n | read from the schematic by eye | |
| C7 | 1800pF | 1.8n | read from the schematic by eye | |
| C8 | 2.2uF | 2.2u | electrolytic; read from the schematic by eye | |
| C8 | 4.7uF | 4.7u | electrolytic; second cap also labelled C8 (designator clash, probably C9); read from the schematic by eye | |
| C10 | 15uF | 15u | non-polar; read from the schematic by eye | |
| C11 | .01uF | 10n | read from the schematic by eye | |
| C12 | .01uF | 10n | read from the schematic by eye | |
| C13 | .01uF | 10n | read from the schematic by eye | |
| C14 | .01uF | 10n | read from the schematic by eye | |
| Diodes 2 | ||||
| D1 | 1N914 | 1N914 | read from the schematic by eye | |
| D2 | 1N914 | 1N914 | read from the schematic by eye | |
| ICs 3 | ||||
| A1-A2 | 4558 | 4558 | part 0802, dual op amp; read from the schematic by eye | |
| A3-A4 | 4558 | 4558 | part 0802, dual op amp; read from the schematic by eye | |
| A5-A6 | 4558 | 4558 | part 0802, dual op amp; read from the schematic by eye | |
| Opto 1 | ||||
| 0805 | ? | ? | Musitronics LED/photocell opto (part 0805), type not given; read from the schematic by eye | |
| Potentiometers 2 | ||||
| Gain | 1M | 1M | Potentiometer | 0101, drawn '1MΩ CCW log' (reverse log taper); read from the schematic by eye |
| Peak | A150k | A150k | Potentiometer | 0102, drawn '150k CW log'; read from the schematic by eye |
| Switches 4 | ||||
| Power | DPST | DPST | 0501, switches +9V and -9V batteries; read from the schematic by eye | |
| Range | DPDT | DPDT | 0504, high/low; read from the schematic by eye | |
| Mode | SP3T | SP3T | 0502, HP/BP/LP; read from the schematic by eye | |
| Drive | DPDT | DPDT | 0503, up/down; read from the schematic by eye | |