Enclosure not stated · 2 knobs
Boss SP-1 SpectrumVerified
Based on the Boss SP-1 Spectrum· 4 other boards clone it
- Category
- EQ / Filter
- Controls
- Balance · Spectrum
- Build
- Vero· 21×14· 24 cuts, 8 links
- Layout
- Verified · Dirtbox Layouts marks it as built and working
- Tags
- Boss, Eq
From the post
A fairly rare old Boss eq pedal which is rarely cloned due to the dual 10kA/10kC Balance control. However, it is quite easy to make your own if you have a dual 10kA pot and a single 10kA pot on hand. Custom pot tuturial and schematic is avaiable HERE.
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 Dirtbox Layouts. No KiCad fragment has been drawn for this circuit yet.
Parts list 21 rows
Report a wrong parseGot parts in a drawer? See what you can build with them.
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 9 | ||||
| ×7 | 10K | 10k | read from the layout by eye | |
| ×2 | 1K | 1k | read from the layout by eye | |
| ×2 | 33K | 33k | read from the layout by eye | |
| ×1 | 470Ω | 470 | read from the layout by eye | |
| ×1 | 18K | 18k | read from the layout by eye | |
| ×1 | 22K | 22k | read from the layout by eye | |
| ×1 | 100K | 100k | read from the layout by eye | |
| ×1 | 470K | 470k | read from the layout by eye | |
| ×1 | 1M | 1M | read from the layout by eye | |
| Capacitors 7 | ||||
| ×1 | 47pF | 47p | read from the layout by eye | |
| ×2 | 3.3nF | 3.3n | read from the layout by eye | |
| ×1 | 47nF | 47n | read from the layout by eye | |
| ×1 | 100nF | 100n | read from the layout by eye | |
| ×2 | 1uF | 1u | film; read from the layout by eye | |
| ×3 | 4.7uF | 4.7u | electrolytic; read from the layout by eye | |
| ×2 | 47uF | 47u | electrolytic; read from the layout by eye | |
| Diodes 1 | ||||
| D1 | 1N5817 | 1N5817 | read from the layout by eye | |
| ICs 1 | ||||
| IC1 | TL074 | TL074 | RC3404 in original; read from the layout by eye | |
| Potentiometers 2 | ||||
| Balance | A10K/C10K | A10K/C10K | Potentiometer | dual; legend: 10kA/10kC dual gang; read from the layout by eye |
| Spectrum | B100K | B100k | Potentiometer | dual; read from the layout by eye |
| Trimmers 1 | ||||
| ×1 | 1K | 1k | read from the layout by eye | |
Other boards based on the Boss SP-1 Spectrum
- Chroma Aion FX · 125B · $12.50
- Chroma (Legacy) Aion FX · 1590B
- SP-1 Spectrum Griffin Effects · $11.00
- SP-1 Spectrum PCBWay: Glory to Ukraine