1590B · 4 knobs
From the vendor
Highly-hyped, highly priced Dumble-in-a-box. Is it good? Yes, its good. Is it original? Well, no. Unless tweaking a Tube Screamer can be considered original. No wonder there's so much goop on them. It's a very responsive overdrive, and considering the TS architecture it's remarkably un-TS-like. Huge gain range, from a touch of drive to full-on oomph, and the tone shaping is very tweakable with the addition of the 'Accent' pot. Now with its own dedicated PCB designed for vertical-mount pots, though you can wire up normal ones if you prefer. Includes a spot for the extra cap required for the Jazz/Rock switch, though you'll have to buy the switch seperately and drill the hole yourself. The kit is supplied with vertical-mount pots which have round shafts, so you'll need set-screw fitting knobs. If you want the PCB without parts there's a link for that at the bottom of the page. Partial kit: PCB, all board-mounted components, pots. Full kit: As above, plus footswitch and appropriate daughterboard/components for your selected bypass type (see Downloads section for details of those), jack sockets, DC socket, battery snap, hook-up wire, LED. Enclosure (pre-drilled) is available as an option with full kits, and will not take a battery. Knobs are not included. Inspired by: Dumbloid Difficulty: Medium PCB size: 50 x 34mm Knobs required: 4 Enclosure: 1590B Direct Connect compatible (4 way) Build doc on the way Download the INSTRUCTION PDF Here's the older version
Schematic
The schematic is in the vendor's build document, page 3. Open the build document. No KiCad fragment has been drawn for this circuit yet.
Parts list 35 rows
Report a wrong parse| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 18 | ||||
| R1 | 100R | 100 | ||
| R2 | 150K | 150k | ||
| R3 | 10K | 10k | ||
| R5 | 10K | 10k | ||
| R6 | 1K8 | 1.8k | ||
| R7 | 10K | 10k | ||
| R8 | 1K | 1k | ||
| R9 | 10K | 10k | ||
| R10 | 10K | 10k | ||
| R11 | 220R | 220 | ||
| R12 | 100K | 100k | ||
| R13 | 10K | 10k | ||
| R14 | 10K | 10k | ||
| R15 | 100R | 100 | ||
| R16 | 10K | 10k | ||
| R17 | 1K | 1k | ||
| R18 | 1K | 1k | ||
| R22 | 1M | 1M | ||
| Capacitors 10 | ||||
| C1 | 470n | 470n | ||
| C2 | 1u | 1u | ||
| C3 | 220n | 220n | ||
| C7 | 47u | 47u | Electrolytic capacitor | |
| C8 | 2u2 | 2.2u | Electrolytic capacitor | |
| C9 | 100n | 100n | ||
| C10 | 220n | 220n | ||
| C11 | 22u | 22u | Electrolytic capacitor | |
| C12 | 100u | 100u | Electrolytic capacitor | |
| C14 | 100p | 100p | ||
| Diodes 1 | ||||
| D3 | 1N4001 | 1N4001 | ||
| Potentiometers 4 | ||||
| TONE | 20-25KB | 20-25KB | ||
| DRIVE | 1MA | A1M | ||
| LEVEL | 100KA | A100k | ||
| ACCENT | 20-25KB | 20-25KB | ||
| LEDs 1 | ||||
| D4 | 3mm Red LED | 3MM RED LED | ||
| Other 1 | ||||
| IC | OPA2134 | OPA2134 | ||