Enclosure not stated · 3 knobs
JHS SuperboltVerified
Based on the JHS Superbolt· 5 other boards clone it
- Category
- Preamp / Amp-in-a-box
- Build
- Perfboard
- Layout
- Verified · Effects Layouts (blog) marks it as built and working
- Tags
- Amp Emulator, JHS, Overdrive
From the post
Here's a popular JHS pedal that emulates old Supro/Valco amps: the Superbolt. It has a remarkable similarity to the Run Off Groove Supreaux and Supreaux Deux. It seems to be a slightly modded Supreaux, with the high/low switch and 18 volt supply of the Supreaux Deux. A charge pump is also added so the pedal can run off a typical 9v supply. You can use an ICL7660 or MAX1044 in place of the LT1054 (though, if you use the MAX1044, be sure to ground pin 5). This one's laid out for on board pots as well as the SPDT switch. Be sure to bias the JFETs to around 9v, then adjust to taste.
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 27 rows
Report a wrong parseGot parts in a drawer? See what you can build with them.
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 7 | ||||
| ×1 | 220Ω | 220 | read from the layout by eye | |
| ×1 | 1.5K | 1.5k | read from the layout by eye | |
| ×1 | 2.7K | 2.7k | read from the layout by eye | |
| ×2 | 12K | 12k | read from the layout by eye | |
| ×1 | 120K | 120k | read from the layout by eye | |
| ×2 | 470K | 470k | read from the layout by eye | |
| ×2 | 1M | 1M | read from the layout by eye | |
| Capacitors 8 | ||||
| ×2 | 470pF | 470p | read from the layout by eye | |
| ×2 | 3.3nF | 3.3n | read from the layout by eye | |
| ×3 | 4.7nF | 4.7n | read from the layout by eye | |
| ×2 | 10nF | 10n | read from the layout by eye | |
| ×1 | 22nF | 22n | read from the layout by eye | |
| ×2 | 10uF | 10u | electrolytic; read from the layout by eye | |
| ×1 | 33uF | 33u | electrolytic; read from the layout by eye | |
| ×1 | 100uF | 100u | electrolytic; read from the layout by eye | |
| Diodes 2 | ||||
| ×2 | 1N5817 | 1N5817 | read from the layout by eye | |
| ×1 | 1N4001 | 1N4001 | 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 | 2N5457 | 2N5457 | JFET; read from the layout by eye | |
| ICs 1 | ||||
| ×1 | LT1054 | LT1054 | read from the layout by eye | |
| Potentiometers 3 | ||||
| Volume | A100K | A100k | Potentiometer | read from the layout by eye |
| Tone | A500K | A500k | Potentiometer | read from the layout by eye |
| Drive | A500K | A500k | Potentiometer | legend calls it Gain; read from the layout by eye |
| Trimmers 2 | ||||
| ×2 | 50K | 50k | read from the layout by eye | |
| ×1 | 100K | 100k | read from the layout by eye | |
| Switches 1 | ||||
| Hi/Low | SPDT on/on | SPDT ON/ON | toggle; read from the layout by eye | |
Other boards based on the JHS Superbolt
- JHS Super Bolt Dirtbox Layouts
- Supreaux Bolt Fuzz Dog · 1590B · £38.40
- UberBolt PCB Guitar Mania · 125B · €11.90
- Taqueria Overdrive PedalPCB · 125B · $12.00
- JHS Superbolt Tagboard Effects