125B · 5 knobs
PedalPCB· PCB609
Figment Preamp
Based on the Acorn Amplifiers MIGFET 50p Preamp· 1 other board clones it
- Category
- Fuzz· OD / Distortion / Fuzz
- Price
- $12.00in stock
- Tags
- 125B
From the vendor
Controls
• Master
• Volume
• Treble
• Mid
• Bass
Details
• Designed for a 125B enclosure with top-mounted jacks
The company, product and service names used in this web site are for comparative purposes only. All trademarks and registered trademarks are the property of their respective owners. This product is not manufactured or distributed by Acorn Amplifiers, maker of the Acorn Amplifiers MIGFET 50P Preamp.
PedalPCB is in no way affiliated with Acorn Amplifiers.
Schematic
The schematic is in the vendor's build document, page 3. Open the build document. No KiCad fragment has been drawn for this circuit yet.
Parts list 44 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 13 | ||||
| R1 | 10K | 10k | Resistor, 1/4W | |
| R2 | 1M | 1M | Resistor, 1/4W | |
| R3 | 1K | 1k | Resistor, 1/4W | |
| R4 | 3K3 | 3.3k | Resistor, 1/4W | |
| R6 | 1M | 1M | Resistor, 1/4W | |
| R7 | 1K | 1k | Resistor, 1/4W | |
| R8 | 1K5 | 1.5k | Resistor, 1/4W | |
| R9 | 47K | 47k | Resistor, 1/4W | |
| R12 | 10K | 10k | Resistor, 1/4W | |
| R13 | 1K | 1k | Resistor, 1/4W | |
| R14 | 2K | 2k | Resistor, 1/4W | |
| R15 | 4K7 | 4.7k | Resistor, 1/4W | |
| CLR | 4K7 | 4.7k | Resistor, 1/4W | * LED current limiting resistor |
| Capacitors 15 | ||||
| C1 | 47n | 47n | Film capacitor, 7.2 x 2.5mm | |
| C2 | 100p | 100p | Ceramic capacitor | |
| C3 | 22u | 22u | Electrolytic capacitor, 5mm | |
| C4 | 2u2 | 2.2u | Electrolytic capacitor, 5mm | |
| C5 | 2n2 | 2.2n | Film capacitor, 7.2 x 2.5mm | |
| C6 | 33n | 33n | Film capacitor, 7.2 x 2.5mm | |
| C7 | 22u | 22u | Electrolytic capacitor, 5mm | |
| C8 | 33n | 33n | Film capacitor, 7.2 x 2.5mm | |
| C9 | 270p | 270p | Ceramic capacitor | |
| C10 | 100n | 100n | Film capacitor, 7.2 x 2.5mm | |
| C11 | 10n | 10n | Film capacitor, 7.2 x 2.5mm | |
| C12 | 22u | 22u | Electrolytic capacitor, 5mm | |
| C13 | 2u2 | 2.2u | Electrolytic capacitor, 5mm | |
| C100 | 10u | 10u | Electrolytic capacitor, 5mm | |
| C101 | 10u | 10u | Electrolytic capacitor, 5mm | |
| Diodes 3 | ||||
| D100 | 1N5817 | 1N5817 | Schottky diode, DO-41 | |
| D101 | 1N4007 | 1N4007 | Standard recovery diode, DO-41 | |
| D102 | 1N4007 | 1N4007 | Standard recovery diode, DO-41 | |
| Transistors 4 | ||||
| Q1 | 2N5457 | 2N5457 | JFET transistor, N-channel | |
| Q2 | 2N5457 | 2N5457 | JFET transistor, N-channel | |
| Q3 | 2N5457 | 2N5457 | JFET transistor, N-channel | |
| Q4 | 2N3904 | 2N3904 | BJT transistor, NPN TO-92 | |
| ICs 1 | ||||
| IC101 | 7660SCPAZ | 7660SCPAZ | Charge pump IC, DIP8 | |
| Potentiometers 5 | ||||
| VOLUME | B50K | B50k | 16mm right-angle PCB mount pot | |
| MASTER | B10K | B10k | 16mm right-angle PCB mount pot | |
| TREBLE | B250K | B250k | 16mm right-angle PCB mount pot | |
| MID | B250K | B250k | 16mm right-angle PCB mount pot | |
| BASS | B250K | B250k | 16mm right-angle PCB mount pot | |
| Trimmers 3 | ||||
| BIAS1 | 50K | 50k | Trimmer potentiometer, 3362P type | |
| BIAS2 | 50K | 50k | Trimmer potentiometer, 3362P type | |
| BIAS3 | 50K | 50k | Trimmer potentiometer, 3362P type | |
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