Enclosure not stated · 2 knobs
Hagerman Amplification Transistor Overdrive
Based on the Hagerman Amplification Transistor Overdrive
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 20 rows
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Check before you build · 1 value the reader of this layout was not sure of
- D1/D2/D3: legend gives only 'D1: 1N5817'; D1 and D2 are drawn as a red antiparallel clipping pair (cols 5-6, rows B-C) and D3 (col 16, rows A-C) is drawn in the usual 1N5817 style next to 9v, so the legend's D1 probably means D3 and the clipping diode type is not given
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 7 | ||||
| ×6 | 10K | 10k | read from the layout by eye | |
| ×3 | 100K | 100k | read from the layout by eye | |
| ×2 | 470K | 470k | read from the layout by eye | |
| ×2 | 100Ω | 100 | read from the layout by eye | |
| ×1 | 330K | 330k | read from the layout by eye | |
| ×1 | 22K | 22k | read from the layout by eye | |
| ×1 | 1K | 1k | read from the layout by eye | |
| Capacitors 6 | ||||
| ×3 | 100nF | 100n | read from the layout by eye | |
| ×2 | 4.7nF | 4.7n | read from the layout by eye | |
| ×1 | 1nF | 1n | read from the layout by eye | |
| ×1 | 100pF | 100p | read from the layout by eye | |
| ×3 | 10uF | 10u | electrolytic; read from the layout by eye | |
| ×1 | 100uF | 100u | electrolytic; read from the layout by eye | |
| Diodes 3 | ||||
| D1 | 1N5817 | 1N5817 | per legend; drawn as a clipping diode antiparallel with D2, the legend probably means D3; read from the layout by eye | |
| D2 | ? | ? | value not given; clipping diode antiparallel with D1; read from the layout by eye | |
| D3 | ? | ? | value not given; drawn as the polarity-protection diode by 9v, probably the legend's 1N5817; read from the layout by eye | |
| Transistors 2 | ||||
| Q1 | 2N3904 | 2N3904 | read from the layout by eye | |
| Q2 | 2N3906 | 2N3906 | PNP; read from the layout by eye | |
| Potentiometers 2 | ||||
| Tone | B100K | B100k | Potentiometer | read from the layout by eye |
| Level | B100K | B100k | Potentiometer | read from the layout by eye |