Enclosure not stated · 2 knobs
America’s Preamp
Based on the DOD 250 Overdrive Preamp· 11 other boards clone it
- Category
- Overdrive
- Price
- $14.00in stock
From the vendor
America’s Preamp is a DIY project based on the classic DOD 250 Preamp Overdrive. The classic two knob overdrive has been given 9 rotary switches making every 250 version available, even the FX50 and the MXR Distortion+.
Options: PCB only PCB and case
Schematic
The schematic is in the vendor's build document, page 2. Open the build document. No KiCad fragment has been drawn for this circuit yet.
Parts list 52 rows
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ocr read from an image · sch paired from the schematic · fixed corrected by hand. Check marked values against the build document.
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 16 | ||||
| R4D | 1kocr | 1k | ||
| R4C | 4k7ocr | 4.7k | ||
| R10 | 4k7ocr | 4.7k | ||
| R2 | 10kocr | 10k | ||
| R4B | 10kocr | 10k | ||
| R6 | 10kocr | 10k | ||
| R4A | 47kocr | 47k | ||
| R3D | 100kocr | 100k | ||
| R3C | 470kocr | 470k | ||
| R3B | 510kocr | 510k | ||
| R1 | 1Mocr | 1M | ||
| R3A | 1Mocr | 1M | ||
| R5 | 1Mocr | 1M | ||
| R7 | 1Mocr | 1M | ||
| R8 | 1Mocr | 1M | ||
| R9 | 100Rocr | 100 | ||
| Capacitors 24 | ||||
| C3B | 30pocr | 30p | ceramic | |
| C3A | 100pocr | 100p | ceramic | |
| C1C | 470pocr | 470p | ceramic | |
| C6C | 470pocr | 470p | ceramic | |
| C1B | 1nocr | 1n | film box | |
| C6B | 1nocr | 1n | film box | |
| C1A | 2n2ocr | 2.2n | film box | |
| C6A | 2n2ocr | 2.2n | film box | |
| C2D | 10nocr | 10n | film box | |
| C2C | 47nocr | 47n | film box | |
| C4D | 47nocr | 47n | film box | |
| C2B | 100nocr | 100n | film box | |
| C4C | 100nocr | 100n | film box | |
| C5D | 100nocr | 100n | film box | |
| C8 | 100nocr | 100n | film box | |
| C4B | 150nocr | 150n | film box | |
| C2A | 220nocr | 220n | film box | |
| C4A | 220nocr | 220n | film box | |
| C5C | 1uocr | 1u | electro | |
| C5B | 4u7ocr | 4.7u | electro | |
| C3C | 10pocr | 10p | ceramic | |
| C5A | 22uocr | 22u | electro | |
| C9 | 47uocr | 47u | electro | |
| C7 | 100uocr | 100u | electro | |
| Diodes 1 | ||||
| D1 | 1N5817ocr | 1N5817 | ||
| ICs 1 | ||||
| IC1 | LM741ocr | LM741 | or TLO71 | |
| Potentiometers 2 | ||||
| Level | A100Kocr | A100k | Potentiometer | |
| Gain | C500Kocr | C500k | Potentiometer | |
| LEDs 5 | ||||
| LED | LEDocr | LED | yellow LED | |
| CD7 | LEDocr | LED | red LED | |
| CD8 | LEDocr | LED | red LED | |
| CD4 | LEDocr | LED | red LED | |
| LED1 | LEDocr | LED | yellow LED | |
| Other 3 | ||||
| CD1 | Geocr | GE | ||
| CD2 | Geocr | GE | ||
| CD47 | 3mmocr | 3MM | or 5mm | |
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