Enclosure not stated · 3 knobs
EarthQuaker Devices DunesVerified
Based on the EarthQuaker Devices Dunes· 5 other boards clone it
From the post
"The Dunes, like the Palisades, is a Tube Screamer variant. Yet it goes a step further from the original, adding a few extra features that go a long way to matching your guitar and pickups, to your amp. The knobs are familiar—Tone, Gain and Volume. In addition, there are three toggle switches that really make things interesting:
Voice: Gives you three tonal differences; MOSFET, Silicon and Normal. These options give you different levels of compression when adding gain, and really change the overall character a lot. The Normal setting has little to no compression if that is desired.
Normal/Bright: Works great when using either darker humbuckers—switch to Bright, or if using single coils, keep it normal. Using the master tone control in conjunction with this switch gives you a lot of useful variation.
Bandwidth: What a traditional Tube Screamer lacks—here, the Dunes gives you the option of adding a lot of deep low end—great for single coils, or switch it back to the more traditional screamer mode, accentuating the midrange, with less emphasis on the bottom end."
PCB and schematic available on PedalPCB website 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 Tagboard Effects. No KiCad fragment has been drawn for this circuit yet.
Parts list 28 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 7 | ||||
| ×5 | 1K | 1k | read from the layout by eye | |
| ×5 | 10K | 10k | read from the layout by eye | |
| ×2 | 22K | 22k | read from the layout by eye | |
| ×2 | 560K | 560k | read from the layout by eye | |
| ×2 | 1M | 1M | read from the layout by eye | |
| ×1 | 330R | 330 | read from the layout by eye | |
| ×1 | 100R | 100 | read from the layout by eye | |
| Capacitors 10 | ||||
| ×1 | 47p | 47p | ceramic; read from the layout by eye | |
| ×1 | 68n | 68n | ceramic; read from the layout by eye | |
| ×2 | 100n | 100n | read from the layout by eye | |
| ×1 | 150n | 150n | read from the layout by eye | |
| ×1 | 220n | 220n | read from the layout by eye | |
| ×1 | 330n | 330n | read from the layout by eye | |
| ×2 | 1u | 1u | electrolytic; read from the layout by eye | |
| ×2 | 10u | 10u | electrolytic; read from the layout by eye | |
| ×1 | 47u | 47u | electrolytic; read from the layout by eye | |
| ×1 | 100u | 100u | electrolytic; read from the layout by eye | |
| Diodes 1 | ||||
| ×3 | 1N4148 | 1N4148 | D2, D3, D4; read from the layout by eye | |
| Transistors 2 | ||||
| ×2 | 2N7000 | 2N7000 | MOSFET; read from the layout by eye | |
| ×2 | MPSA18 | MPSA18 | read from the layout by eye | |
| ICs 1 | ||||
| IC1 | LM833 | LM833 | read from the layout by eye | |
| Potentiometers 3 | ||||
| Volume | B100K | B100k | Potentiometer | read from the layout by eye |
| Tone | B5K | B5k | Potentiometer | read from the layout by eye |
| Drive | A500K | A500k | Potentiometer | read from the layout by eye |
| Switches 3 | ||||
| Voice | SPDT on/off/on | SPDT ON/OFF/ON | Switch 1, toggle; read from the layout by eye | |
| Bandwidth | SPDT | SPDT | Switch 2, toggle; read from the layout by eye | |
| Bright | SPDT | SPDT | Switch 3, toggle; read from the layout by eye | |
| LEDs 1 | ||||
| D1 | 3mm Red LED | 3MM RED LED | on the board; read from the layout by eye | |
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