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Free the Tone HB-2 Heat BlasterVerified
Based on the Free the Tone HB-2 Heat Blaster· 1 other board clones it
From the post
Got a request for this one. Basically a Tube Screamer with a few mods and some extra switches to cut highs and lows. The original has 2SC185 transistors, which have BCE pinout. I've laid this out for the more typical CBE pinout. Like you would in a Tube Screamer, try 2N3904, 2N5088, etc for the input and output buffers.
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 Effects Layouts (blog). 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
- 8.6K at the top left (column E, rows A-D): printed clearly, unusual value
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 7 | ||||
| ×8 | 10K | 10k | read from the layout by eye | |
| ×5 | 1K | 1k | read from the layout by eye | |
| ×2 | 510K | 510k | read from the layout by eye | |
| ×1 | 330Ω | 330 | read from the layout by eye | |
| ×1 | 100Ω | 100 | read from the layout by eye | |
| ×1 | 8.6K | 8.6k | read from the layout by eye | |
| ×1 | 2.2M | 2.2M | read from the layout by eye | |
| Capacitors 10 | ||||
| ×2 | 220nF | 220n | read from the layout by eye | |
| ×2 | 100nF | 100n | read from the layout by eye | |
| ×2 | 470nF | 470n | read from the layout by eye | |
| ×2 | 1uF | 1u | read from the layout by eye | |
| ×1 | 150nF | 150n | read from the layout by eye | |
| ×1 | 47nF | 47n | read from the layout by eye | |
| ×1 | 47pF | 47p | read from the layout by eye | |
| ×1 | 10uF | 10u | electrolytic; read from the layout by eye | |
| ×1 | 47uF | 47u | electrolytic; read from the layout by eye | |
| ×1 | 100uF | 100u | electrolytic; read from the layout by eye | |
| Diodes 1 | ||||
| ×1 | 1N5817 | 1N5817 | read from the layout by eye | |
| Transistors 2 | ||||
| Q1 | 2SC1815 | 2SC1815 | 2SC1815 in original, try 2N3904, 2N5088, etc.; read from the layout by eye | |
| Q2 | 2SC1815 | 2SC1815 | 2SC1815 in original, try 2N3904, 2N5088, etc.; read from the layout by eye | |
| ICs 1 | ||||
| IC1 | TL072 | TL072 | read from the layout by eye | |
| Potentiometers 3 | ||||
| Gain | A1M | A1M | Potentiometer | read from the layout by eye |
| Tone | B20K | B20k | Potentiometer | read from the layout by eye |
| Level | A100K | A100k | Potentiometer | wired as Volume on the board; read from the layout by eye |
| Switches 2 | ||||
| High | SPDT | SPDT | toggle; read from the layout by eye | |
| Low | SPST | SPST | toggle; read from the layout by eye | |
| LEDs 2 | ||||
| D1 | 3mm red LED | 3MM RED LED | read from the layout by eye | |
| D2 | 3mm red LED | 3MM RED LED | read from the layout by eye | |
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