Enclosure not stated · 3 knobs
Washburn A-D3 Stack in a Box
Based on the Washburn A-D3 Stack in a Box· 1 other board clones it
- Category
- Distortion
- Build
- Vero· 26×23· 42 cuts, 16 links
- Layout
- Unverified · no build reported at Dirtbox Layouts yet
- Tags
- Distortion, Overdrive, Washburn
From the post
A J-FET amp emulator hailing back from the early 80s, quite ahead of its time. Trimpots are included to be able to bias the FETs and the 5,6k inline with the trimpots is reduced to 2,2k to be able to use a wider range of J FETs. Schematic is avaiable HERE.
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 Dirtbox Layouts. No KiCad fragment has been drawn for this circuit yet.
Parts list 34 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 10 | ||||
| ×5 | 15K | 15k | read from the layout by eye | |
| ×4 | 2.2K | 2.2k | read from the layout by eye | |
| ×10 | 10K | 10k | read from the layout by eye | |
| ×5 | 100K | 100k | read from the layout by eye | |
| ×3 | 1M | 1M | read from the layout by eye | |
| ×2 | 220K | 220k | read from the layout by eye | |
| ×3 | 470K | 470k | read from the layout by eye | |
| ×1 | 100Ω | 100 | read from the layout by eye | |
| ×1 | 220Ω | 220 | read from the layout by eye | |
| ×1 | ? | ? | LED resistor, value not given; read from the layout by eye | |
| Capacitors 13 | ||||
| ×4 | 470nF | 470n | read from the layout by eye | |
| ×3 | 33nF | 33n | read from the layout by eye | |
| ×3 | 100nF | 100n | read from the layout by eye | |
| ×2 | 100pF | 100p | read from the layout by eye | |
| ×2 | 10nF | 10n | read from the layout by eye | |
| ×2 | 47nF | 47n | read from the layout by eye | |
| ×2 | 47pF | 47p | read from the layout by eye | |
| ×1 | 4.7nF | 4.7n | read from the layout by eye | |
| ×1 | 1nF | 1n | read from the layout by eye | |
| ×1 | 22nF | 22n | read from the layout by eye | |
| ×1 | 100uF | 100u | electrolytic; read from the layout by eye | |
| ×1 | 47uF | 47u | electrolytic; read from the layout by eye | |
| ×1 | 1uF | 1u | electrolytic; read from the layout by eye | |
| Diodes 1 | ||||
| D1 | 1N5817 | 1N5817 | read from the layout by eye | |
| Transistors 4 | ||||
| Q1 | 2N5457 | 2N5457 | JFET; legend: 2N5457 or other J-FET (2SK30-GR and Y in original); read from the layout by eye | |
| Q2 | 2N5457 | 2N5457 | JFET; legend: 2N5457 or other J-FET (2SK30-GR and Y in original); read from the layout by eye | |
| Q3 | 2N5457 | 2N5457 | JFET; legend: 2N5457 or other J-FET (2SK30-GR and Y in original); read from the layout by eye | |
| Q4 | 2N5457 | 2N5457 | JFET; legend: 2N5457 or other J-FET (2SK30-GR and Y in original); read from the layout by eye | |
| ICs 2 | ||||
| IC1 | RC4558 | RC4558 | read from the layout by eye | |
| IC2 | RC4558 | RC4558 | read from the layout by eye | |
| Potentiometers 3 | ||||
| Gain | A500K | A500k | Potentiometer | read from the layout by eye |
| Tone | B500K | B500k | Potentiometer | read from the layout by eye |
| Level | A100K | A100k | Potentiometer | read from the layout by eye |
| Trimmers 1 | ||||
| ×4 | 5K | 5k | read from the layout by eye | |
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