1590B · 1 knob
EHX Small CloneVerified
Based on the Electro-Harmonix Small Clone· 7 other boards clone it
- Category
- Vibrato / Chorus
- Controls
- Rate
- Build
- Perfboard
- Layout
- Verified · Effects Layouts (blog) marks it as built and working
- Tags
- Chorus, Electro Harmonix
From the post
The blog needs more modulation, so here's the classic EHX Small Clone chorus. Made famous by Kurt Cobain, the Small Clone has a wide range of chorus tones. I've laid it out two ways, one stock, and one with the Depth switch replaced with a pot. You can probably squeeze this into a 1590B, but I'd stick with a 125B if you want the board mounted to the pot(s). Schematic for reference.
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 48 rows
Report a wrong parseGot parts in a drawer? See what you can build with them.
Check before you build · 2 values the reader of this layout was not sure of
- 2.2uF at the top left is drawn as a yellow round part, unlike the grey electrolytic cans: taken as tantalum, could be a non-polar cap
- IC printed only '4558' (JRC4558 / RC4558), kept as printed
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 22 | ||||
| ×1 | 120K | 120k | read from the layout by eye | |
| ×1 | 47Ω | 47 | read from the layout by eye | |
| ×1 | 180K | 180k | read from the layout by eye | |
| ×1 | 47K | 47k | read from the layout by eye | |
| ×1 | 470K | 470k | read from the layout by eye | |
| ×6 | 10K | 10k | read from the layout by eye | |
| ×1 | 68K | 68k | read from the layout by eye | |
| ×1 | 82K | 82k | read from the layout by eye | |
| ×1 | 4.7K | 4.7k | read from the layout by eye | |
| ×1 | 2.7K | 2.7k | read from the layout by eye | |
| ×4 | 39K | 39k | read from the layout by eye | |
| ×1 | 12K | 12k | read from the layout by eye | |
| ×3 | 33K | 33k | read from the layout by eye | |
| ×1 | 3.3K | 3.3k | read from the layout by eye | |
| ×2 | 6.8K | 6.8k | read from the layout by eye | |
| ×2 | 1K | 1k | read from the layout by eye | |
| ×1 | 1M | 1M | read from the layout by eye | |
| ×2 | 220K | 220k | read from the layout by eye | |
| ×1 | 22K | 22k | read from the layout by eye | |
| ×2 | 56K | 56k | read from the layout by eye | |
| ×1 | 20K | 20k | read from the layout by eye | |
| ×1 | 100K | 100k | read from the layout by eye | |
| Capacitors 14 | ||||
| ×1 | 47nF | 47n | read from the layout by eye | |
| ×1 | 150pF | 150p | read from the layout by eye | |
| ×1 | 470pF | 470p | read from the layout by eye | |
| ×1 | 15nF | 15n | read from the layout by eye | |
| ×2 | 10nF | 10n | read from the layout by eye | |
| ×1 | 3.3nF | 3.3n | read from the layout by eye | |
| ×1 | 33nF | 33n | read from the layout by eye | |
| ×1 | 2.7nF | 2.7n | read from the layout by eye | |
| ×1 | 180pF | 180p | read from the layout by eye | |
| ×1 | 4.7nF | 4.7n | read from the layout by eye | |
| ×1 | 2.2uF | 2.2u | tantalum; read from the layout by eye | |
| ×5 | 10uF | 10u | electrolytic; read from the layout by eye | |
| ×3 | 1uF | 1u | electrolytic; read from the layout by eye | |
| ×1 | 220uF | 220u | electrolytic; read from the layout by eye | |
| Diodes 2 | ||||
| ×1 | 1N4001 | 1N4001 | read from the layout by eye | |
| ×2 | 1N4148 | 1N4148 | read from the layout by eye | |
| Transistors 3 | ||||
| Q1 | 2N5087 | 2N5087 | read from the layout by eye | |
| Q2 | 2N5088 | 2N5088 | read from the layout by eye | |
| Q3 | 2N5088 | 2N5088 | read from the layout by eye | |
| ICs 4 | ||||
| ×1 | LM358 | LM358 | read from the layout by eye | |
| ×1 | CD4047 | CD4047 | read from the layout by eye | |
| ×1 | MN3007 | MN3007 | BBD; read from the layout by eye | |
| ×1 | 4558 | 4558 | read from the layout by eye | |
| Potentiometers 1 | ||||
| Rate | C1M | C1M | Potentiometer | read from the layout by eye |
| Trimmers 1 | ||||
| ×1 | 100K | 100k | read from the layout by eye | |
| Switches 1 | ||||
| Depth | SPST | SPST | toggle; read from the layout by eye | |
Other boards based on the Electro-Harmonix Small Clone
- Lithium Aion FX · 125B · $12.50
- Electro Harmonix Small Clone Dirtbox Layouts
- Small Clone Chorus Guitar-Electronics.eu · €7.25
- Touchstone Madbean · 125B · $12.00
- Memoria Mod Electronics · 1590N1 · $4.95
- EHX Small Clone Tagboard Effects · 1590B
- Small Clone Chorus Tonepad · $14.00