Enclosure not stated · 2 knobs
From the vendor
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The Headphone Amplifier is just that – an amplifier for using headphones while playing guitar. This version features a gain trimmer to dial in a good clean signal, and an output volume knob to keep your ears from bleeding. Check out the Testing Rig if you’d consider using one of these in conjunction with a tiny-tester to create a low volume device for testing, trouble shooting, and designing guitar effects PCBs.
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Schematic
The schematic is in the vendor's build document. Open the build document. No KiCad fragment has been drawn for this circuit yet.
Parts list 27 rows
Report a wrong parse| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 13 | ||||
| R1 | 1M | 1M | ||
| R8 | 100R | 100 | ||
| R2 | 1M | 1M | ||
| R9 | 4.7K | 4.7k | ||
| R3 | 1K | 1k | ||
| R10 | 10K | 10k | ||
| R4 | 3.9K | 3.9k | ||
| R11 | 10K | 10k | ||
| R5 | 3.9K | 3.9k | ||
| R12 | 56K | 56k | ||
| R6 | 100K | 100k | ||
| R13 | 4.7K | 4.7k | ||
| R7 | 100R | 100 | ||
| Capacitors 6 | ||||
| C1 | 47uF | 47u | ||
| C2 | 47uF | 47u | ||
| C3 | 1uF | 1u | ||
| C4 | 4.7uF | 4.7u | ||
| C5 | 100nF | 100n | ||
| C6 | 100pF | 100p | ||
| Diodes 3 | ||||
| D1 | 1N914 | 1N914 | ||
| D2 | 1N914 | 1N914 | ||
| D4 | 1N4001 | 1N4001 | ||
| Transistors 2 | ||||
| Q1 | 2N3904 | 2N3904 | ||
| Q2 | 2N3906 | 2N3906 | ||
| ICs 1 | ||||
| IC1 | TL071 | TL071 | ||
| Potentiometers 2 | ||||
| VOLUME | C100K | C100k | Potentiometer | |
| GAIN | 500K | 500k | Potentiometer | |