Enclosure not stated · 3 knobs
Maestro Octave
Based on the Maestro OB-1 Octave Box· 1 other board clones it
- Category
- Octave / Pitch· Vibrato and Pitch Shift
- Controls
- Sensitivity · Guitar Volume · Bass Volume
- Price
- see vendor
- Tags
- Vibrato and Pitch Shift
Schematic
The schematic is the archived file. Open it at Experimentalists Anonymous, or browse its folder.
Parts list 53 rows
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Check before you build · 2 values the reader of this schematic was not sure of
- .22uF divider-output cap: value partly obscured by screening
- 1.4uF pick detector cap: odd value, read as drawn
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 22 | ||||
| ×2 | 150K | 150k | read from the schematic by eye | |
| ×1 | 150K | 150k | Q1 base to ground; marked as removed on later versions; read from the schematic by eye | |
| ×3 | 3.3K | 3.3k | read from the schematic by eye | |
| ×2 | 680K | 680k | read from the schematic by eye | |
| ×2 | 68K | 68k | read from the schematic by eye | |
| ×7 | 10K | 10k | read from the schematic by eye | |
| ×1 | 68 | 68 | read from the schematic by eye | |
| ×2 | 100 | 100 | read from the schematic by eye | |
| ×1 | 470 | 470 | read from the schematic by eye | |
| ×3 | 22K | 22k | read from the schematic by eye | |
| ×1 | 120K | 120k | read from the schematic by eye | |
| ×1 | ? | ? | Q3 base bias, factory tailored (no value printed); read from the schematic by eye | |
| ×2 | 100K | 100k | read from the schematic by eye | |
| ×1 | 1M | 1M | read from the schematic by eye | |
| ×3 | 47K | 47k | read from the schematic by eye | |
| ×1 | 82K | 82k | read from the schematic by eye | |
| ×1 | 330K | 330k | read from the schematic by eye | |
| ×1 | 2.2K | 2.2k | read from the schematic by eye | |
| ×2 | 220K | 220k | read from the schematic by eye | |
| ×1 | 1.2K | 1.2k | read from the schematic by eye | |
| ×1 | 1.5M | 1.5M | read from the schematic by eye | |
| ×1 | 4.7K | 4.7k | read from the schematic by eye | |
| Capacitors 14 | ||||
| ×4 | .1uF | 100n | read from the schematic by eye | |
| ×4 | .01uF | 10n | read from the schematic by eye | |
| ×3 | 1uF | 1u | electrolytic; read from the schematic by eye | |
| ×2 | .22uF | 220n | one (divider output filter) partly obscured by screening; read from the schematic by eye | |
| ×1 | .068uF | 68n | read from the schematic by eye | |
| ×1 | .022uF | 22n | read from the schematic by eye | |
| ×1 | 500pF | 500p | read from the schematic by eye | |
| ×1 | 1.4uF | 1.4u | electrolytic, pick detector; read from the schematic by eye | |
| ×1 | .47uF | 470n | read from the schematic by eye | |
| ×1 | .33uF | 330n | read from the schematic by eye | |
| ×1 | .056uF | 56n | read from the schematic by eye | |
| ×1 | 200uF | 200u | electrolytic, across battery; read from the schematic by eye | |
| ×1 | 10uF | 10u | electrolytic, +8V rail; read from the schematic by eye | |
| ×1 | ? | ? | Q10 base to ground, factory tailored (no value printed); read from the schematic by eye | |
| Diodes 3 | ||||
| D1 | 1N4148 | 1N4148 | read from the schematic by eye | |
| D2 | 1N4148 | 1N4148 | read from the schematic by eye | |
| D3 | 1N4148 | 1N4148 | read from the schematic by eye | |
| Transistors 10 | ||||
| Q1 | 2N3392 | 2N3392 | read from the schematic by eye | |
| Q2 | 2N3392 | 2N3392 | read from the schematic by eye | |
| Q3 | 2N3392 | 2N3392 | read from the schematic by eye | |
| Q4 | 2N3392 | 2N3392 | read from the schematic by eye | |
| Q5 | 2N3392 | 2N3392 | read from the schematic by eye | |
| Q6 | 2N3392 | 2N3392 | read from the schematic by eye | |
| Q7 | 2N3392 | 2N3392 | read from the schematic by eye | |
| Q8 | 2N3392 | 2N3392 | read from the schematic by eye | |
| Q9 | 2N3392 | 2N3392 | read from the schematic by eye | |
| Q10 | 2N3392 | 2N3392 | read from the schematic by eye | |
| ICs 1 | ||||
| IC1 | MFC4040 | MFC4040 | divider IC (Motorola 4-pin); read from the schematic by eye | |
| Potentiometers 3 | ||||
| Sensitivity | B10K | B10k | Potentiometer | VR1, linear; read from the schematic by eye |
| Guitar Volume | A10K | A10k | Potentiometer | VR2, audio; read from the schematic by eye |
| Bass Volume | A10K | A10k | Potentiometer | VR3, audio; read from the schematic by eye |
Other boards based on the Maestro OB-1 Octave Box
- Maestro OB-1 Octave Box Dirtbox Layouts