Enclosure not stated · 5 knobs
Catalinbread Dirty Little Secret V3Verified
Based on the Catalinbread Dirty Little Secret Mk. III· 4 other boards clone it
- Category
- Preamp / Amp-in-a-box
- Build
- Vero· 18×21· 26 cuts, 9 links
- Layout
- Verified · Dirtbox Layouts marks it as built and working
- Tags
- Amp Emulator, Catalinbread, Distortion, Overdrive, Pre Amp
From the post
Slightly modified with the internal DIP switches moved to the outside and splitted into two DPDT switches. One is for gain and one is for the tonestack (Super Bass and Super Lead modes). 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 39 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 11 | ||||
| ×2 | 2.2M | 2.2M | read from the layout by eye | |
| ×5 | 1M | 1M | read from the layout by eye | |
| ×3 | 470K | 470k | read from the layout by eye | |
| ×1 | 100K | 100k | read from the layout by eye | |
| ×1 | 56K | 56k | read from the layout by eye | |
| ×1 | 47K | 47k | read from the layout by eye | |
| ×2 | 33K | 33k | read from the layout by eye | |
| ×1 | 4.7K | 4.7k | read from the layout by eye | |
| ×4 | 1K | 1k | read from the layout by eye | |
| ×1 | 680Ω | 680 | read from the layout by eye | |
| ×1 | 100Ω | 100 | read from the layout by eye | |
| Capacitors 14 | ||||
| ×2 | 680nF | 680n | read from the layout by eye | |
| ×2 | 220nF | 220n | read from the layout by eye | |
| ×1 | 100nF | 100n | read from the layout by eye | |
| ×4 | 22nF | 22n | read from the layout by eye | |
| ×1 | 10nF | 10n | read from the layout by eye | |
| ×1 | 2.2nF | 2.2n | read from the layout by eye | |
| ×1 | 1nF | 1n | read from the layout by eye | |
| ×4 | 470pF | 470p | read from the layout by eye | |
| ×1 | 270pF | 270p | read from the layout by eye | |
| ×1 | 220pF | 220p | read from the layout by eye | |
| ×1 | 47pF | 47p | read from the layout by eye | |
| ×1 | 100uF | 100u | electrolytic; read from the layout by eye | |
| ×1 | 22uF | 22u | electrolytic; read from the layout by eye | |
| ×2 | 2.2uF | 2.2u | electrolytic; read from the layout by eye | |
| Diodes 1 | ||||
| D1 | 1N5817 | 1N5817 | read from the layout by eye | |
| Transistors 5 | ||||
| Q1 | MPF4393 | MPF4393 | JFET; read from the layout by eye | |
| Q2 | MPF4393 | MPF4393 | JFET; read from the layout by eye | |
| Q3 | MPF4393 | MPF4393 | JFET; read from the layout by eye | |
| Q4 | MPF4393 | MPF4393 | JFET; read from the layout by eye | |
| Q5 | MPF4393 | MPF4393 | JFET; read from the layout by eye | |
| Potentiometers 5 | ||||
| Pre Amp | A1M | A1M | Potentiometer | read from the layout by eye |
| Bass | A1M | A1M | Potentiometer | read from the layout by eye |
| Middle | B25K | B25k | Potentiometer | read from the layout by eye |
| Treble | B250K | B250k | Potentiometer | read from the layout by eye |
| Master | B250K | B250k | Potentiometer | read from the layout by eye |
| Trimmers 1 | ||||
| Presence | 10K | 10k | read from the layout by eye | |
| Switches 2 | ||||
| Gain | DPDT on/on | DPDT ON/ON | toggle; read from the layout by eye | |
| Tone | DPDT on/on | DPDT ON/ON | toggle; read from the layout by eye | |
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