Enclosure not stated · 2 knobs
EarthQuaker Devices Spires Red Channel
Based on the EarthQuaker Devices Spires Red Channel· 1 other board clones it
From the post
For those who don't want the whole Spires circuit with all the offboard wiring comes two separate öayouts for each channel. The red channel is a modified silicon fuzz face with some additional filtering and a fuzz control at the input. MPS3704 transistors seems to be not that common but a quick equivalent search reveals that they are NPN silicon transistors with a minum Hfe at 300. So 2N5088s or the BC54x family might begood subs if you don't have the stock transistors on hand. 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 18 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 6 | ||||
| ×1 | 1K | 1k | read from the layout by eye | |
| ×1 | 47K | 47k | read from the layout by eye | |
| ×1 | 39Ω | 39 | read from the layout by eye | |
| ×2 | 10K | 10k | read from the layout by eye | |
| ×1 | 1.5K | 1.5k | read from the layout by eye | |
| ×1 | 100K | 100k | read from the layout by eye | |
| Capacitors 6 | ||||
| ×3 | 100nF | 100n | read from the layout by eye | |
| ×1 | 15pF | 15p | read from the layout by eye | |
| ×1 | 6.8nF | 6.8n | read from the layout by eye | |
| ×1 | 22uF | 22u | electrolytic; read from the layout by eye | |
| ×1 | 100uF | 100u | electrolytic; read from the layout by eye | |
| ×1 | 4.7uF | 4.7u | electrolytic; read from the layout by eye | |
| Diodes 1 | ||||
| D1 | 1N5817 | 1N5817 | read from the layout by eye | |
| Transistors 2 | ||||
| Q1 | MPS3704 | MPS3704 | read from the layout by eye | |
| Q2 | MPS3704 | MPS3704 | read from the layout by eye | |
| Potentiometers 2 | ||||
| Fuzz | B1M | B1M | Potentiometer | read from the layout by eye |
| Level | B100K | B100k | Potentiometer | read from the layout by eye |
| Trimmers 1 | ||||
| ×1 | 20K | 20k | read from the layout by eye | |
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