Enclosure not stated · 5 knobs
Electronic Audio Experiments HD130 PreampVerified
Based on the Electronic Audio Experiments HD130 Preamp
From the post
Schematic is avaiable HERE.
Schematic
This is a board layout, a drawing of where each part goes, and the post may link the schematic it was drawn from. Open the layout at Dirtbox Layouts. No KiCad fragment has been drawn for this circuit yet.
Parts list 28 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 9 | ||||
| ×1 | 1M | 1M | read from the layout by eye | |
| ×1 | 330K | 330k | read from the layout by eye | |
| ×1 | 220K | 220k | read from the layout by eye | |
| ×3 | 100K | 100k | read from the layout by eye | |
| ×1 | 68K | 68k | read from the layout by eye | |
| ×1 | 22K | 22k | read from the layout by eye | |
| ×2 | 10K | 10k | read from the layout by eye | |
| ×2 | 4.7K | 4.7k | read from the layout by eye | |
| ×1 | 100Ω | 100 | read from the layout by eye | |
| Capacitors 10 | ||||
| ×1 | 33pF | 33p | read from the layout by eye | |
| ×3 | 100pF | 100p | read from the layout by eye | |
| ×1 | 3.3nF | 3.3n | read from the layout by eye | |
| ×1 | 15nF | 15n | read from the layout by eye | |
| ×8 | 100nF | 100n | read from the layout by eye | |
| ×1 | 220nF | 220n | read from the layout by eye | |
| ×1 | 470nF | 470n | read from the layout by eye | |
| ×2 | 1uF | 1u | film box; read from the layout by eye | |
| ×1 | 10uF | 10u | electrolytic; read from the layout by eye | |
| ×2 | 100uF | 100u | electrolytic; read from the layout by eye | |
| Diodes 1 | ||||
| D1 | 1N5817 | 1N5817 | read from the layout by eye | |
| ICs 3 | ||||
| IC1 | RC4558 | RC4558 | read from the layout by eye | |
| IC2 | LM301 | LM301 | read from the layout by eye | |
| IC3 | ICL7660S | ICL7660S | read from the layout by eye | |
| Potentiometers 5 | ||||
| Treble | B25K | B25k | Potentiometer | read from the layout by eye |
| Bass | A25K | A25k | Potentiometer | read from the layout by eye |
| Mid | B5K | B5k | Potentiometer | read from the layout by eye |
| Gain | A10K | A10k | Potentiometer | read from the layout by eye |
| Volume | A10K | A10k | Potentiometer | read from the layout by eye |