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Base pedal: Paul Cochrane Zefram Overdrive
The Zefram Overdrive isn't a name I can place with confidence, so rather than invent a history for it, the honest note is that this is a clone of what appears to be a boutique or limited-run overdrive design — worth building if you've encountered the original and want a reproducible, cost-effective version.
Component Name | Type | Default Part | Qty |
|---|---|---|---|
| 22R | RESISTOR | MFR-25-22R | 1 |
| 680R | RESISTOR | MFR-25-680R | 1 |
| 1K | RESISTOR | 1 | |
| 1K5 | RESISTOR | 2 | |
| 2K2 | RESISTOR | 1 | |
| 3K3 | RESISTOR | 2 | |
| 4K7 | RESISTOR | 3 | |
| 9K1 | RESISTOR | MFR-25-9K1 | 1 |
| 47K | RESISTOR | 1 | |
| 1M | RESISTOR | 2 | |
| 100p Ceramic | CAPACITOR | CERAMIC-100P | 2 |
| 1n5 Film | CAPACITOR | 1 | |
| 33n Film | CAPACITOR | 4 | |
| 47n Film | CAPACITOR | 1 | |
| 100n Film | CAPACITOR | 5 | |
| 1u Film | CAPACITOR | 3 | |
| 100u Electrolytic | CAPACITOR | ELECTRO-16V-100U | 3 |
| RC4558D | IC | RC4558D | 1 |
| TC1044SCPA | IC | TC1044SCPA | 1 |
| TL072 | IC | TL072 | 1 |
| 1N4148 | DIODE | 1N4148 | 7 |
| 1N4742A | DIODE | 1N4742A | 1 |
| 1N5817 | DIODE | 1N5817 | 1 |
| A10K 16mm | POTENTIOMETER | A10K-16MM | 1 |
| C10K 16mm | POTENTIOMETER | C10K-16MM | 1 |
| C25K 16mm | POTENTIOMETER | C25K-16MM | 1 |
| C50K 16mm | POTENTIOMETER | C50K-16MM | 1 |
| A500K 16mm | POTENTIOMETER | A500K-16MM | 1 |
| DPDT ON/OFF/ON | SWITCH | 1 | |
| SPDT ON/OFF/ON | SWITCH | 1 |