1590B · 2 knobs
From the vendor
Take the edge off with this clone of the long discontinued Boss SG-1 Slow Gear. What does it do? It softens your note attack a bit like some really fast volume knob bowing. A very pleasant effect that softens things up nicely. Dont expect glacial-paced swells mind you. It's all quite quick, but certainly noticeable. We've done some back to back testing with various FETs and found the 2N5457 gives exactly the same results as the 2SK30A found in the original, so that's what we're supplying. There's an extra pad on the PCB to accommodate the different pinout of the latter if you want to use one. 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: Slow Gear Difficulty: Medium PCB size: 50 x 50mm Knobs required: 2 Enclosure: 1590B Direct-Connect compatible (4-way) Download the INSTRUCTION PDF
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 56 rows
Report a wrong parse| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 26 | ||||
| R1 | 1K | 1k | ||
| R2 | 470K | 470k | ||
| R3 | 10K | 10k | ||
| R4 | 22K | 22k | ||
| R5 | 3K3 | 3.3k | ||
| R6 | 470K | 470k | ||
| R7 | 47K | 47k | ||
| R8 | 1M | 1M | ||
| R9 | 1M | 1M | ||
| R10 | 1M | 1M | ||
| R11 | 10K | 10k | ||
| R12 | 1K | 1k | ||
| R13 | 100K | 100k | ||
| R14 | 470R | 470 | ||
| R15 | 220K | 220k | ||
| R16 | 390R | 390 | ||
| R17 | 1M | 1M | ||
| R18 | 1K | 1k | ||
| R19 | 390K | 390k | ||
| R20 | 4K7 | 4.7k | ||
| R21 | 4K7 | 4.7k | ||
| R22 | 100K | 100k | ||
| R23 | 100K | 100k | ||
| R24 | 10K | 10k | ||
| R26 | 22K | 22k | ||
| R27 | 22K | 22k | ||
| Capacitors 17 | ||||
| C1 | 47n | 47n | ||
| C2 | 22n | 22n | ||
| C3 | 1u | 1u | elec | |
| C4 | 1u | 1u | elec | |
| C5 | 33n | 33n | ||
| C7 | 1u | 1u | elec | |
| C8 | 47u | 47u | elec | |
| C9 | 22n | 22n | ||
| C10 | 1u | 1u | elec | |
| C11 | 10u | 10u | elec | |
| C12 | 1n | 1n | ||
| C13 | 1u | 1u | elec | |
| C14 | 1u | 1u | elec | |
| C15 | 47n | 47n | ||
| C16 | 10u | 10u | elec | |
| C17 | 47u | 47u | elec | |
| C18 | 10u | 10u | elec | |
| Diodes 4 | ||||
| D2 | 1N4148 | 1N4148 | ||
| D3 | 1N4148 | 1N4148 | ||
| D4 | 1N4148 | 1N4148 | ||
| D1 | 5v6 zener | 5V6 ZENER | ||
| Transistors 6 | ||||
| Q3 | BC549 | BC549 | ||
| Q4 | BC549 | BC549 | ||
| Q5 | BC549 | BC549 | ||
| Q6 | BC549 | BC549 | ||
| Q1 | BC549 | BC549 | ||
| Q2 | N-Channel | N-CHANNEL | ||
| ICs 1 | ||||
| IC1 | LM741 | LM741 | ||
| Potentiometers 2 | ||||
| ATT | 25KB | B25k | Potentiometer | |
| SENS | 100KA | A100k | Potentiometer | |