Enclosure not stated · 3 knobs
EHX Hot TubesVerified
Based on the Electro-Harmonix Hot Tubes· 8 other boards clone it
- Category
- Distortion
- Build
- Vero· 20×20· 33 cuts, 16 links
- Layout
- Verified · Tagboard Effects marks it as built and working
- Tags
- Distortion, Electro Harmonix, Overdrive
From the post
Another one that was missing from the library. Original units call for 2M pot for the overdrive control, but as the demo below suggest, the middle position of that knob should be mild enough. So i see no harm in using 1M pot for that instead. That'll give you the latter half of the sweep.
...aaand i built one for myself. 1M lin pot for the drive works really well. At minimum setting the effect is slight overdrive with a nice tube sounding overdrive going on. When maxed it's a very high gain driver and sounds really nice. I think i may need to get myself an original nano version to compare them. But yes. This sounds very good. One more thing. I usually sub log volume pots for linear as i like the sweep better. On this one. Nope. You'll definitely want it to be logarithmic.
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 32 rows
Report a wrong parseGot parts in a drawer? See what you can build with them.
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 14 | ||||
| ×3 | 47K | 47k | read from the layout by eye | |
| ×3 | 1M | 1M | read from the layout by eye | |
| ×2 | 20K | 20k | read from the layout by eye | |
| ×2 | 220K | 220k | read from the layout by eye | |
| ×2 | 150K | 150k | read from the layout by eye | |
| ×2 | 1.8M | 1.8M | read from the layout by eye | |
| ×1 | 150Ω | 150 | read from the layout by eye | |
| ×1 | 1.2K | 1.2k | read from the layout by eye | |
| ×1 | 5.6K | 5.6k | read from the layout by eye | |
| ×1 | 8.2K | 8.2k | read from the layout by eye | |
| ×1 | 75K | 75k | read from the layout by eye | |
| ×1 | 120K | 120k | read from the layout by eye | |
| ×1 | 200K | 200k | read from the layout by eye | |
| ×1 | 430K | 430k | read from the layout by eye | |
| Capacitors 11 | ||||
| ×1 | 39pF | 39p | read from the layout by eye | |
| ×1 | 47pF | 47p | read from the layout by eye | |
| ×1 | 180pF | 180p | read from the layout by eye | |
| ×3 | 100nF | 100n | read from the layout by eye | |
| ×1 | 120nF | 120n | read from the layout by eye | |
| ×1 | 150nF | 150n | read from the layout by eye | |
| ×2 | 220nF | 220n | read from the layout by eye | |
| ×1 | 1uF | 1u | electrolytic; read from the layout by eye | |
| ×4 | 4.7uF | 4.7u | electrolytic; read from the layout by eye | |
| ×1 | 10uF | 10u | electrolytic; read from the layout by eye | |
| ×1 | 33uF | 33u | electrolytic; read from the layout by eye | |
| Diodes 1 | ||||
| D1 | 1N5817 | 1N5817 | read from the layout by eye | |
| ICs 2 | ||||
| IC1 | JRC4558 | JRC4558 | read from the layout by eye | |
| IC2 | CD4049UBE | CD4049UBE | read from the layout by eye | |
| Potentiometers 3 | ||||
| Drive | B2M | B2M | Potentiometer | legend: Overdrive 2M lin (try 1M); read from the layout by eye |
| Tone | B10K | B10k | Potentiometer | read from the layout by eye |
| Volume | A10K | A10k | Potentiometer | read from the layout by eye |
| Switches 1 | ||||
| Tone bypass | SPDT on/on | SPDT ON/ON | toggle; read from the layout by eye | |
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