Enclosure not stated · 3 knobs
Exar HR-03 Hammer
Based on the Exar HR-03 Hammer· 1 other board clones it
- Category
- Distortion
- Build
- Vero· 20×24· 29 cuts, 14 links
- Layout
- Unverified · no build reported at Tagboard Effects yet
- Tags
- Distortion, Exar
From the post
Another one from Vitalii's traces. This one seems quite nice modern metal distortion with reasonable frequency characteristics. Should be enough gain too. The 47K at the top (horizontal one) may be a point to tweak for even more over the top gain. Like so many of these pedals of Polish origin, this one seems to have no demos available either..
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 Tagboard Effects. No KiCad fragment has been drawn for this circuit yet.
Parts list 38 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 17 | ||||
| ×8 | 10K | 10k | read from the layout by eye | |
| ×5 | 1M | 1M | read from the layout by eye | |
| ×2 | 100K | 100k | read from the layout by eye | |
| ×2 | 47K | 47k | read from the layout by eye | |
| ×2 | 470Ω | 470 | read from the layout by eye | |
| ×1 | 560K | 560k | read from the layout by eye | |
| ×1 | 470K | 470k | read from the layout by eye | |
| ×1 | 270K | 270k | read from the layout by eye | |
| ×1 | 22K | 22k | read from the layout by eye | |
| ×1 | 16K | 16k | read from the layout by eye | |
| ×1 | 8.2K | 8.2k | read from the layout by eye | |
| ×1 | 3.3K | 3.3k | read from the layout by eye | |
| ×1 | 2.2K | 2.2k | read from the layout by eye | |
| ×1 | 1K | 1k | read from the layout by eye | |
| ×1 | 820Ω | 820 | read from the layout by eye | |
| ×1 | 390Ω | 390 | read from the layout by eye | |
| ×1 | 180Ω | 180 | read from the layout by eye | |
| Capacitors 12 | ||||
| ×3 | 47nF | 47n | read from the layout by eye | |
| ×1 | 470nF | 470n | read from the layout by eye | |
| ×1 | 100nF | 100n | read from the layout by eye | |
| ×1 | 68nF | 68n | read from the layout by eye | |
| ×1 | 10nF | 10n | read from the layout by eye | |
| ×1 | 3.3nF | 3.3n | read from the layout by eye | |
| ×2 | 100pF | 100p | read from the layout by eye | |
| ×1 | 47pF | 47p | read from the layout by eye | |
| ×4 | 1uF | 1u | electrolytic; read from the layout by eye | |
| ×3 | 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 3 | ||||
| D1 | 1N5817 | 1N5817 | read from the layout by eye | |
| D2 | 1N4148 | 1N4148 | read from the layout by eye | |
| D3 | 1N4148 | 1N4148 | read from the layout by eye | |
| Transistors 2 | ||||
| ×1 | 2SK30 | 2SK30 | JFET, input buffer; read from the layout by eye | |
| ×4 | BC550 | BC550 | legend: BC550(B); read from the layout by eye | |
| ICs 1 | ||||
| IC1 | TL072 | TL072 | read from the layout by eye | |
| Potentiometers 3 | ||||
| Metal | B100K | B100k | Potentiometer | read from the layout by eye |
| Tone | B100K | B100k | Potentiometer | read from the layout by eye |
| Level | A50K | A50k | Potentiometer | read from the layout by eye |
Other boards based on the Exar HR-03 Hammer
- Exar HR-03 Hammer Dirtbox Layouts