Enclosure not stated · 3 knobs
CMAT Mods Signa DriveVerified
Based on the CMAT Mods Signa· 1 other board clones it
From the post
Pretty much as standard TS808 with slight modification and switchable clipping diodes. We've seen it all a thousand times but here it is in case anyone would like to build one.
Info from the manufacturer about the original:
This OD has so much tone it is unbelievable. The harmonics and note clarity just drip out of it. This is the best sounding OD that I have ever built. I would put this up against any OD at any price built by anyone. It took me along time to get this pedal where it is. I had a tone in my head and I have finally got it. This has a 3 way toggle switch that allows different clipping and gain structures.
The Signa Drive can go from a clean boost all the way to a Marshall crunch and every thing in between. If you are looking for a very versatile OD this is it. I am very proud of this pedal.
This pedal is so good, it most likely will replace both the Tubeslammer and the Tubeslammer Deluxe!
Updated 4th September 2014 - new compact layout added
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 27 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 8 | ||||
| ×8 | 10K | 10k | read from the layout by eye | |
| ×4 | 1K | 1k | read from the layout by eye | |
| ×2 | 620K | 620k | read from the layout by eye | |
| ×1 | 2K2 | 2.2k | read from the layout by eye | |
| ×1 | 2M2 | 2.2M | read from the layout by eye | |
| ×1 | 4K7 | 4.7k | read from the layout by eye | |
| ×1 | 100R | 100 | read from the layout by eye | |
| ×1 | 220R | 220 | read from the layout by eye | |
| Capacitors 7 | ||||
| ×3 | 100n | 100n | read from the layout by eye | |
| ×2 | 1u | 1u | read from the layout by eye | |
| ×2 | 220n | 220n | read from the layout by eye | |
| ×1 | 51p | 51p | read from the layout by eye | |
| ×1 | 10u | 10u | electrolytic; read from the layout by eye | |
| ×1 | 47u | 47u | electrolytic; read from the layout by eye | |
| ×1 | 100u | 100u | electrolytic; read from the layout by eye | |
| Diodes 3 | ||||
| D1 | 1N914 | 1N914 | on the switch; read from the layout by eye | |
| D2 | 1N914 | 1N914 | on the switch; read from the layout by eye | |
| D5 | 1N4001 | 1N4001 | read from the layout by eye | |
| Transistors 2 | ||||
| Q1 | 2N3904 | 2N3904 | read from the layout by eye | |
| Q2 | 2N3904 | 2N3904 | read from the layout by eye | |
| ICs 1 | ||||
| IC1 | RC4558P | RC4558P | read from the layout by eye | |
| Potentiometers 3 | ||||
| Drive | B500K | B500k | Potentiometer | read from the layout by eye |
| Tone | B2K | B2k | Potentiometer | read from the layout by eye |
| Level | B100K | B100k | Potentiometer | read from the layout by eye |
| Switches 1 | ||||
| SW1 | DPDT on/off/on | DPDT ON/OFF/ON | toggle, clipping select; read from the layout by eye | |
| LEDs 2 | ||||
| D3 | 3mm red LED | 3MM RED LED | on the switch; read from the layout by eye | |
| D4 | 3mm red LED | 3MM RED LED | on the switch; read from the layout by eye | |
Other boards based on the CMAT Mods Signa
- CMAT Mods Signa Effects Layouts (blog)