Enclosure not stated · 3 knobs
Ibanez Dirt Box
Based on the Ibanez Dirt Box· 1 other board clones it
- Category
- Distortion
- Build
- Perfboard
- Layout
- Unverified · no build reported at Effects Layouts (blog) yet
- Tags
- Distortion, Fuzz, Ibanez
From the post
Here's a rare one from the 70s by Ibanez. It was originally marketed as the OD-850 Overdrive II (not to be confused with the OD-855). But since the nature of this pedal is more distortion/fuzz territory, it wasn't a great name and it was changed to the Dirt Box. Whatever you want to call it, the circuit is essentially a Distortion +/DOD 250/Ross Distortion with a dual op-amp and a Tube Screamer-like tone control. The 220n capacitor coming off lug 2 of the Tone pot was originally a tantalum cap, but like the Tube Screamer, using a film cap should give better response. The sound is apparently similar to the op-amp version of the old EHX Muff Fuzz (the one that plugged directly into your guitar, not the BMP).
Schematic
This is a board layout, a drawing of where each part goes, and the post may link the schematic it was drawn from. Open the layout at Effects Layouts (blog). No KiCad fragment has been drawn for this circuit yet.
Parts list 22 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 7 | ||||
| ×3 | 1K | 1k | read from the layout by eye | |
| ×3 | 1M | 1M | read from the layout by eye | |
| ×3 | 10K | 10k | read from the layout by eye | |
| ×2 | 4.7K | 4.7k | read from the layout by eye | |
| ×1 | 1.8K | 1.8k | read from the layout by eye | |
| ×1 | 330Ω | 330 | read from the layout by eye | |
| ×1 | 56K | 56k | read from the layout by eye | |
| Capacitors 8 | ||||
| ×3 | 1uF | 1u | electrolytic; read from the layout by eye | |
| ×1 | 47uF | 47u | electrolytic; read from the layout by eye | |
| ×1 | 33uF | 33u | electrolytic; read from the layout by eye | |
| ×2 | 1nF | 1n | read from the layout by eye | |
| ×1 | 220nF | 220n | read from the layout by eye | |
| ×1 | 47nF | 47n | read from the layout by eye | |
| ×1 | 3.3nF | 3.3n | read from the layout by eye | |
| ×1 | 10nF | 10n | read from the layout by eye | |
| Diodes 3 | ||||
| D1 | 1N34A | 1N34A | legend: germanium (1N34a) or silicon (1N4148); read from the layout by eye | |
| D2 | 1N34A | 1N34A | legend: germanium (1N34a) or silicon (1N4148); read from the layout by eye | |
| ×1 | 1N4001 | 1N4001 | read from the layout by eye | |
| ICs 1 | ||||
| ×1 | 1458 | 1458 | dual op-amp, printed as 1458; read from the layout by eye | |
| Potentiometers 3 | ||||
| Sustain | C500K | C500k | Potentiometer | printed 500K Rev log; read from the layout by eye |
| Tone | B20K | B20k | Potentiometer | printed 20K Lin; read from the layout by eye |
| Balance | B50K | B50k | Potentiometer | printed 50K Lin; read from the layout by eye |
Other boards based on the Ibanez Dirt Box
- Ibanez Dirt Box Dirtbox Layouts