Enclosure not stated · 4 knobs
EarthQuaker Devices HoofVerified
Based on the EarthQuaker Devices Hoof· 6 other boards clone it
From the post
In honor of it being Pi Day, I thought a Big Muff layout would be appropriate. While not an EHX Muff, the EQD Hoof is a BMP variant. It uses germanium transistors as well as LEDs in place of the typical silicon diodes in the 2 gain stages. It also has a Shift control, which allows you to boost the mids typically scooped in the standard BMP. Pots can be board mounted from the solder-side of the board using right angle PCB pots.
If anyone want to make the Cloven Hoof, use 2N5089 for Q1 and 4, use MPSA13s instead of germaniums for Q2-3, replace D3-4 with 1N4148s, and remove the 470pF cap by Q2.
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 27 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
- Q2, Q3: the legend prints 1N1308; entered as 2N1308, the germanium transistor
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 10 | ||||
| ×1 | 1M | 1M | read from the layout by eye | |
| ×2 | 8.2K | 8.2k | read from the layout by eye | |
| ×2 | 39K | 39k | read from the layout by eye | |
| ×3 | 2.2K | 2.2k | read from the layout by eye | |
| ×4 | 100K | 100k | read from the layout by eye | |
| ×3 | 100Ω | 100 | read from the layout by eye | |
| ×3 | 470K | 470k | read from the layout by eye | |
| ×3 | 15K | 15k | read from the layout by eye | |
| ×1 | 390K | 390k | read from the layout by eye | |
| ×1 | 10K | 10k | read from the layout by eye | |
| Capacitors 4 | ||||
| ×8 | 100nF | 100n | read from the layout by eye | |
| ×2 | 6.8nF | 6.8n | read from the layout by eye | |
| ×3 | 470pF | 470p | read from the layout by eye | |
| ×1 | 100uF | 100u | electrolytic; read from the layout by eye | |
| Diodes 1 | ||||
| ×1 | 1N4001 | 1N4001 | read from the layout by eye | |
| Transistors 4 | ||||
| Q1 | 2N3904 | 2N3904 | read from the layout by eye | |
| Q2 | 2N1308 | 2N1308 | as printed in the legend; likely 2N1308; printed '1N1308' on the drawing; read from the layout by eye | |
| Q3 | 2N1308 | 2N1308 | as printed in the legend; likely 2N1308; printed '1N1308' on the drawing; read from the layout by eye | |
| Q4 | 2N3904 | 2N3904 | read from the layout by eye | |
| Potentiometers 4 | ||||
| Fuzz | B50K | B50k | Potentiometer | read from the layout by eye |
| Tone | B100K | B100k | Potentiometer | read from the layout by eye |
| Shift | B25K | B25k | Potentiometer | read from the layout by eye |
| Volume | A1M | A1M | Potentiometer | pads labelled Level; read from the layout by eye |
| LEDs 4 | ||||
| D1 | 5mm red LED | 5MM RED LED | read from the layout by eye | |
| D2 | 5mm red LED | 5MM RED LED | read from the layout by eye | |
| D3 | 5mm red LED | 5MM RED LED | read from the layout by eye | |
| D4 | 5mm red LED | 5MM RED LED | read from the layout by eye | |
Other boards based on the EarthQuaker Devices Hoof
- Earthquaker Devices Hoof Fuzz Dirtbox Layouts
- Horn Device PCB Guitar Mania · 1590B · €9.90
- Hoof PCBWay: Glory to Ukraine
- Boneyard Hoof Naegele Audio
- Ungula PedalPCB · 125B · $8.00
- EarthQuaker Devices Hoof Fuzz Tagboard Effects