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Base pedal: Dunlop Echoplex EP-3 Preamp
Reproduction of the Echoplex EP-3 tape echo unit's preamp section. Uses a charge pump to generate 18–24V, with a three-position Fat switch selecting between early EP-3, late EP-3, and a thickened tone mode. Tone enhancer with minimal gain above unity.
Component Name | Type | Default Part | Qty |
|---|---|---|---|
| 60R | RESISTOR | MFR-25-60R | 1 |
| 3K3 | RESISTOR | 1 | |
| 4K7 | RESISTOR | 1 | |
| 10K | RESISTOR | 1 | |
| 15K | RESISTOR | MFR-25-15K | 1 |
| 22K | RESISTOR | 2 | |
| 100K | RESISTOR | 3 | |
| 220K | RESISTOR | 2 | |
| 470K | RESISTOR | 1 | |
| 1M | RESISTOR | 5 | |
| 220p MLCC | CAPACITOR | 2 | |
| 22n Film | CAPACITOR | 4 | |
| 100n Film | 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 | 2 |
| LT1054CP | IC | LT1054CP | 1 |
| 2N5484 | TRANSISTOR | 2N5484 | 1 |
| 2N5485 | TRANSISTOR | 2N5485 | 1 |
| 1N4743A | DIODE | 1N4743A | 1 |
| 1N5819 | DIODE | 1N5819 | 2 |
| 5mm Red | LED | 1 | |
| B500K 16mm | POTENTIOMETER | 1 | |
| SPDT ON/OFF/ON | SWITCH | 1 |