Enclosure not stated · 4 knobs
Dunwich Amplification Volt Thrower - Big box versionVerified
Based on the Dunwich Amplification Volt Thrower - Big box version
- Category
- Distortion
- Build
- Vero· 21×21· 40 cuts, 12 links
- Layout
- Verified · Dirtbox Layouts marks it as built and working
- Tags
- Distortion, Dunwich Amplification, Fuzz
From the post
A bit hesistant to upload this one since there is an unknown cap value and pot value. But a quite a few people have requested this one so I guess a 95% accurate trace is ok? Traced by evilarsen, AlexS and myself. It is a Rat based circuit running on 9v/-9v up to 18v/-18v. It is intended for bass but works equally well for heavy down tuned guitar playing. Tonestack is a passive James variant and there is an extra gain/makeup stage before the output. The diode selector rotary switch has a quite interesting configuration. Many of the diodes are stacked and are asymmetric. Probably the keep an even output level across the switching range?
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 29 rows
Report a wrong parseGot parts in a drawer? See what you can build with them.
Check before you build · 1 value the reader of this layout was not sure of
- 30pF, two of them (column 20 top right and column 11 centre): printed clearly, unusual value
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 7 | ||||
| ×3 | 1M | 1M | read from the layout by eye | |
| ×3 | 100K | 100k | read from the layout by eye | |
| ×2 | 470Ω | 470 | read from the layout by eye | |
| ×2 | 1K | 1k | read from the layout by eye | |
| ×1 | 27K | 27k | read from the layout by eye | |
| ×1 | 33Ω | 33 | read from the layout by eye | |
| ×1 | ? | ? | LED resistor, value not given; read from the layout by eye | |
| Capacitors 9 | ||||
| ×2 | 2.2nF | 2.2n | read from the layout by eye | |
| ×1 | 10nF | 10n | read from the layout by eye | |
| ×1 | 1nF | 1n | read from the layout by eye | |
| ×2 | 100pF | 100p | read from the layout by eye | |
| ×2 | 30pF | 30p | read from the layout by eye | |
| C7 | ? | ? | value not given; legend: Unknown value, 330pF works fine; read from the layout by eye | |
| ×2 | 2.2uF | 2.2u | electrolytic; read from the layout by eye | |
| ×1 | 4.7uF | 4.7u | electrolytic; read from the layout by eye | |
| ×2 | 47uF | 47u | electrolytic; read from the layout by eye | |
| Diodes 3 | ||||
| ×6 | 1N4148 | 1N4148 | D4-D9; legend: 1N4148/1N914; read from the layout by eye | |
| ×5 | Schottky | SCHOTTKY | D10-D14; legend: Shottky or germanium; read from the layout by eye | |
| D15 | 1N5819 | 1N5819 | read from the layout by eye | |
| ICs 3 | ||||
| IC1 | LM308 | LM308 | read from the layout by eye | |
| IC2 | OP07 | OP07 | read from the layout by eye | |
| IC3 | LTC1144 | LTC1144 | read from the layout by eye | |
| Potentiometers 4 | ||||
| Gain | A100K | A100k | Potentiometer | read from the layout by eye |
| Bass | C1M | C1M | Potentiometer | read from the layout by eye |
| Volume | A1M | A1M | Potentiometer | read from the layout by eye |
| Treble | A1M | A1M | Potentiometer | read from the layout by eye |
| Trimmers 1 | ||||
| ×2 | 1K | 1k | Other Freq Gain, Low Freq Gain; read from the layout by eye | |
| Switches 1 | ||||
| Switch | 2P6T rotary | 2P6T ROTARY | read from the layout by eye | |
| LEDs 1 | ||||
| ×3 | 3mm red LED | 3MM RED LED | D1-D3, on the board; read from the layout by eye | |