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Base pedal: Dunlop Echoplex EP-3 Preamp
Based on the Echoplex EP-3 preamp. A tone enhancer built around dual JFETs with a charge pump for elevated voltage. Toggle switch selects early version (bright), late version (darker, fatter), or a third full-range mode. Minimal gain, interactive with preceding pedals.
Component Name | Type | Default Part | Qty |
|---|---|---|---|
| 59R | RESISTOR | MFR-25-59R | 1 |
| 3K3 | RESISTOR | 1 | |
| 10K | RESISTOR | 2 | |
| 15K | RESISTOR | MFR-25-15K | 1 |
| 22K | RESISTOR | 2 | |
| 100K | RESISTOR | 3 | |
| 220K | RESISTOR | 2 | |
| 470K | RESISTOR | 1 | |
| 1M | RESISTOR | 4 | |
| 4M7 | RESISTOR | MFR-25-4M7 | 1 |
| 220p MLCC | CAPACITOR | 2 | |
| 22n Film | CAPACITOR | 3 | |
| 22n MLCC | CAPACITOR | MLCC-22N-5MM | 1 |
| 100n Film | CAPACITOR | 1 | |
| 100n MLCC | CAPACITOR | 1 | |
| 470n Film | CAPACITOR | 1 | |
| 470n MLCC | CAPACITOR | MLCC-470N-5MM | 2 |
| 10u Electrolytic | CAPACITOR | ELECTRO-16V-10U | 2 |
| 47u Electrolytic | CAPACITOR | ELECTRO-16V-47U | 1 |
| 100u Electrolytic | CAPACITOR | ELECTRO-16V-100U | 1 |
| LT1054CP | IC | LT1054CP | 1 |
| 2N5484 | TRANSISTOR | 2N5484 | 1 |
| 2N5485 | TRANSISTOR | 2N5485 | 1 |
| 1N4743A | DIODE | 1N4743A | 1 |
| 1N5817 | DIODE | 1N5817 | 3 |
| 5mm Red | LED | 1 | |
| B500K 16mm | POTENTIOMETER | 1 | |
| 3PDT Stomp | SWITCH | 1 | |
| SPDT ON/OFF/ON | SWITCH | 1 | |
| DIP-8 Socket | SOCKET | SOCKET-DIP-8 | 1 |
| 125B | ENCLOSURE | 1 | |
| 9V Battery Snap | CONNECTOR | BATTERY-SNAP-9V | 1 |
| Jack 1/4" TR | JACK | 1 | |
| Jack 1/4" TRS | JACK | 1 | |
| Jack 2.1mm DC | JACK | 1 |