Enclosure not stated · 5 knobs
Electronic Audio Experiments Musicman HD PreampVerified
Based on the Electronic Audio Experiments Musicman HD Preamp
From the post
Schematic is avaiable HERE. *Edit 240216* wyongroadelelectroncs verified this layout. He also noticed that the Bass and Mid pot connections was is incorrect in the linked schematic. The Layout is updated and tagged.
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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Check before you build · 1 value the reader of this layout was not sure of
- 100nF count: two red film, one translucent film and two yellow ceramics marked 100nF (column 4 row I, column 15 rows D-E)
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 10 | ||||
| ×3 | 100K | 100k | read from the layout by eye | |
| ×2 | 10K | 10k | read from the layout by eye | |
| ×1 | 220K | 220k | read from the layout by eye | |
| ×1 | 68K | 68k | read from the layout by eye | |
| ×1 | 100Ω | 100 | read from the layout by eye | |
| ×1 | 1M | 1M | read from the layout by eye | |
| ×1 | 22K | 22k | read from the layout by eye | |
| ×1 | 330K | 330k | read from the layout by eye | |
| ×1 | 4.7K | 4.7k | read from the layout by eye | |
| ×1 | ? | ? | LED resistor, value not given; read from the layout by eye | |
| Capacitors 9 | ||||
| ×4 | 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 | |
| ×5 | 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; read from the layout by eye | |
| ×1 | 10uF | 10u | electrolytic; read from the layout by eye | |
| ×2 | 47uF | 47u | electrolytic; read from the layout by eye | |
| Diodes 1 | ||||
| D1 | 1N5817 | 1N5817 | read from the layout by eye | |
| ICs 3 | ||||
| IC1 | TL072 | TL072 | Try 1458, LM358, 4558 etc.; read from the layout by eye | |
| IC2 | TL072 | TL072 | Try 1458, LM358, 4558 etc.; read from the layout by eye | |
| IC3 | MAX1044 | MAX1044 | MAX1044, ICL7660SCPA; 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 | B2K | B2k | 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 |