Enclosure not stated · 2 knobs
Fairfield Circuitry Unpleasant SurpriseVerified
Based on the Fairfield Circuitry Unpleasant Surprise· 2 other boards clone it
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 30 rows
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Check before you build · 1 value the reader of this layout was not sure of
- 16K at column 6, rows E-G: printed clearly, unusual value
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 12 | ||||
| ×2 | 680Ω | 680 | read from the layout by eye | |
| ×2 | 1K | 1k | read from the layout by eye | |
| ×2 | 10K | 10k | read from the layout by eye | |
| ×1 | 16K | 16k | read from the layout by eye | |
| ×2 | 33K | 33k | read from the layout by eye | |
| ×2 | 68K | 68k | read from the layout by eye | |
| ×2 | 100K | 100k | read from the layout by eye | |
| ×1 | 150K | 150k | read from the layout by eye | |
| ×1 | 270K | 270k | read from the layout by eye | |
| ×3 | 1M | 1M | read from the layout by eye | |
| ×2 | 2M | 2M | read from the layout by eye | |
| ×3 | 10M | 10M | read from the layout by eye | |
| Capacitors 6 | ||||
| ×1 | 100pF | 100p | read from the layout by eye | |
| ×2 | 2.2nF | 2.2n | read from the layout by eye | |
| ×4 | 47nF | 47n | read from the layout by eye | |
| ×2 | 100nF | 100n | read from the layout by eye | |
| ×1 | 1uF | 1u | read from the layout by eye | |
| ×1 | 220uF | 220u | electrolytic; read from the layout by eye | |
| Diodes 3 | ||||
| D1 | 5.1V Zener | 5V1 | read from the layout by eye | |
| ×2 | 1N4148 | 1N4148 | D2, D3; read from the layout by eye | |
| D4 | 1N5817 | 1N5817 | read from the layout by eye | |
| Transistors 3 | ||||
| Q1 | J201 | J201 | JFET; read from the layout by eye | |
| Q2 | J201 | J201 | JFET; read from the layout by eye | |
| Q3 | 2N3904 | 2N3904 | read from the layout by eye | |
| ICs 1 | ||||
| IC1 | TL072 | TL072 | read from the layout by eye | |
| Potentiometers 2 | ||||
| Onset | A100K | A100k | Potentiometer | read from the layout by eye |
| Volume | A100K | A100k | Potentiometer | read from the layout by eye |
| Switches 3 | ||||
| C | SPDT on/on | SPDT ON/ON | toggle; read from the layout by eye | |
| G | SPDT on/on | SPDT ON/ON | toggle; read from the layout by eye | |
| T | SPDT on/on | SPDT ON/ON | toggle; read from the layout by eye | |
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