Enclosure not stated · 4 knobs
Earthquaker Devices Grey ChannelVerified
Based on the EarthQuaker Devices Grey Channel· 4 other boards clone it
From the post
A dual overdrive based on the classic grey spec DOD 250.
The schematic didn't come from the original EQD pedal.
David has recreated the circuit on his website (Perf & PCB Effects Layouts).
You can find his original and verified layout 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 26 rows
Report a wrong parseGot parts in a drawer? See what you can build with them.
Check before you build · 3 values the reader of this layout was not sure of
- Switch A & B: legend prints 'SPST (On-Off-On)' but three lugs are wired per switch (SwA 1-3, SwB 1-3); entered as SPDT on/off/on
- IC printed only as '1458': kept as printed, prefix not given
- Channel footswitch drawn with six lugs; entered as DPDT, type not stated
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 6 | ||||
| ×2 | 20K | 20k | read from the layout by eye | |
| ×4 | 1M | 1M | read from the layout by eye | |
| ×2 | 470K | 470k | read from the layout by eye | |
| ×2 | 47K | 47k | read from the layout by eye | |
| ×4 | 10K | 10k | read from the layout by eye | |
| ×2 | 4K7 | 4.7k | read from the layout by eye | |
| Capacitors 6 | ||||
| ×2 | 2n2 | 2.2n | read from the layout by eye | |
| ×2 | 22n | 22n | read from the layout by eye | |
| ×2 | 47n | 47n | read from the layout by eye | |
| ×1 | 10u | 10u | electrolytic; read from the layout by eye | |
| ×2 | 22u | 22u | electrolytic; read from the layout by eye | |
| ×1 | 100u | 100u | electrolytic; read from the layout by eye | |
| Diodes 3 | ||||
| ×2 | 1N4148 | 1N4148 | D3, D4; read from the layout by eye | |
| ×2 | 1N34A | 1N34A | D5, D6; read from the layout by eye | |
| D7 | 1N5817 | 1N5817 | read from the layout by eye | |
| Transistors 1 | ||||
| ×2 | 2N7000 | 2N7000 | MOSFET; read from the layout by eye | |
| ICs 1 | ||||
| ×1 | 1458 | 1458 | read from the layout by eye | |
| Potentiometers 4 | ||||
| Level A | A100K | A100k | Potentiometer | read from the layout by eye |
| Level B | A100K | A100k | Potentiometer | read from the layout by eye |
| Gain A | B1M | B1M | Potentiometer | read from the layout by eye |
| Gain B | B1M | B1M | Potentiometer | read from the layout by eye |
| Switches 3 | ||||
| Switch A | SPDT on/off/on | SPDT ON/OFF/ON | toggle; legend: SPST (On-Off-On); read from the layout by eye | |
| Switch B | SPDT on/off/on | SPDT ON/OFF/ON | toggle; legend: SPST (On-Off-On); read from the layout by eye | |
| Channel | DPDT | DPDT | channel footswitch; read from the layout by eye | |
| LEDs 2 | ||||
| ×2 | 5mm red LED | 5MM RED LED | D1, D2, on the board; read from the layout by eye | |
| Channel LED | bi-colour LED | BI-COLOUR LED | off-board; legend: use Bi-Colour LED for Channel Footswitch; read from the layout by eye | |
Other boards based on the EarthQuaker Devices Grey Channel
- Earthquaker Devices Grey Channel Dirtbox Layouts
- Earthquaker Devices Grey Channel Effects Layouts (blog)
- Tv Channel, Dual Channel Overdrive PCB Guitar Mania · 1590BB · €8.90
- Grey Channel PCBWay: Glory to Ukraine