Enclosure not stated · 5 knobs
Sunn Beta PreampVerified
Based on the Sunn Beta Lead· 4 other boards clone it
- Category
- Preamp / Amp-in-a-box
- Difficulty
- Difficult
- Build
- Vero· 33×22· 67 cuts, 33 links
- Layout
- Verified · Tagboard Effects marks it as built and working
- Tags
- Bass, Pre-amp, Sunn
From the post
This is a single channel version of Sunn Beta Bass & Lead Preamps.
You can find the original FSB thread here.
There are two different sets of caps depending on which version you want to build.
You could use Mark's Bipolar Voltage Converter if you want:
http://tagboardeffects.blogspot.fr/2014/01/bipolar-voltage-converter.html
You could also use this external board to wire a Bass/Lead Switch instead of using fixed caps:
(20/H, 19/C, 22/J.. are board's points coordinates where C1-4 should be placed)
If you want to build the original A/B Channels version just build 2 identical circuits and connect their outputs to the daughterboad below
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 42 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
- D1-D2: legend prints '1n456A (30V Zener)', printed clearly, unusual part number for a zener
- 2u2 x8 are drawn as red discs like the small ceramics, not as electrolytic cans; type not stated
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 19 | ||||
| ×2 | 68K | 68k | read from the layout by eye | |
| ×2 | 10K | 10k | read from the layout by eye | |
| ×3 | 22K | 22k | read from the layout by eye | |
| ×5 | 100K | 100k | read from the layout by eye | |
| ×3 | 47K | 47k | read from the layout by eye | |
| ×1 | 470R | 470 | read from the layout by eye | |
| ×1 | 470K | 470k | read from the layout by eye | |
| ×2 | 330K | 330k | read from the layout by eye | |
| ×3 | 1M | 1M | read from the layout by eye | |
| ×1 | 1K5 | 1.5k | read from the layout by eye | |
| ×1 | 33K | 33k | read from the layout by eye | |
| ×3 | 12K | 12k | read from the layout by eye | |
| ×2 | 15K | 15k | read from the layout by eye | |
| ×1 | 2M2 | 2.2M | read from the layout by eye | |
| ×2 | 120K | 120k | read from the layout by eye | |
| ×1 | 4K7 | 4.7k | read from the layout by eye | |
| ×1 | 3K3 | 3.3k | read from the layout by eye | |
| ×1 | 220K | 220k | read from the layout by eye | |
| ×1 | 150R | 150 | read from the layout by eye | |
| Capacitors 14 | ||||
| C1 | 56n | 56n | Bass version; Lead version 22n; read from the layout by eye | |
| C2 | 8n2 | 8.2n | Bass version; Lead version 5n; read from the layout by eye | |
| C3 | 15n | 15n | Bass version; Lead version 8n2; read from the layout by eye | |
| C4 | 47n | 47n | Bass version; Lead version 27n; read from the layout by eye | |
| ×1 | 82p | 82p | read from the layout by eye | |
| ×2 | 33p | 33p | read from the layout by eye | |
| ×1 | 5p | 5p | read from the layout by eye | |
| ×1 | 200p | 200p | read from the layout by eye | |
| ×1 | 2n2 | 2.2n | read from the layout by eye | |
| ×1 | 47n | 47n | read from the layout by eye | |
| ×1 | 100n | 100n | read from the layout by eye | |
| ×8 | 2u2 | 2.2u | read from the layout by eye | |
| ×1 | 10u | 10u | electrolytic; read from the layout by eye | |
| ×1 | 680u | 680u | electrolytic; read from the layout by eye | |
| Diodes 1 | ||||
| ×2 | 1N456A | 1N456A | D1, D2; legend: 30V Zener; read from the layout by eye | |
| ICs 3 | ||||
| ×1 | 4069 | 4069 | read from the layout by eye | |
| ×3 | 4558 | 4558 | read from the layout by eye | |
| ×1 | TL071 | TL071 | read from the layout by eye | |
| Potentiometers 5 | ||||
| Level | B100K | B100k | Potentiometer | read from the layout by eye |
| Bass | B100K | B100k | Potentiometer | read from the layout by eye |
| Mids | B100K | B100k | Potentiometer | read from the layout by eye |
| Treble | B100K | B100k | Potentiometer | read from the layout by eye |
| Drive | B1M | B1M | Potentiometer | dual; read from the layout by eye |
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