1590B · 4 knobs
Fuzz Dog· Acti-Boost
Acti-Boost - Type A and Type R
Based on the AC Boost / RC Boost
- Category
- Boost
- Controls
- Bass · Gain · Treb · Vol
- Difficulty
- Medium
- Price
- £31.20
- Tags
- od-distortion
From the vendor
A nice pair of boosts/tone shapers, both of which can be made using the same PCB (though only one at a time - come on!).
Both versions utilise Baxandall active EQ circuitry to keep your tone perky, offering +/- 15db on bass and treble.
So, what's the difference?
• Type A offers a bit of grit with your boost, pushing into overdrive at the top of the turn.
• Type R is clean, clean, clean right up to the top end of the range, where a bit of dirt starts to creep in.
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.
Builds are only available with full kits including enclosure and vertical-mount pots. Please choose appropriate knobs.
Inspired by: AC Boost / RC Boost
Difficulty: Medium
PCB size: 50 x 50mm
Knobs required: 4
Enclosure: 1590B
Direct-Connect compatible (4-way)
Download 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 45 rows
Report a wrong parse| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 19 | ||||
| R1 | 1M | 1M | ||
| R2 | 10K | 10k | ||
| R3 | 1M | 1M | ||
| R4 | 10K | 10k | ||
| R5 | 10K | 10k | ||
| R6 | 100R | 100 | ||
| R7 | 47K | 47k | ||
| R8 | 1K | 1k | ||
| R9 | 4K7 | 4.7k | ||
| R10 | 33K | 33k | ||
| R11 | 4K7 | 4.7k | ||
| R12 | 10K | 10k | ||
| R13 | 470K | 470k | ||
| R14 | 10K | 10k | ||
| R15 | 470R | 470 | ||
| R16 | 100K | 100k | ||
| R17 | 15K | 15k | ||
| R18 | 6K8 | 6.8k | ||
| R19 | 22K | 22k | ||
| Capacitors 13 | ||||
| C1 | 22n | 22n | ||
| C2 | 47n | 47n | ||
| C3 | 150p | 150p | ||
| C4 | 33n | 33n | ||
| C5 | 33n | 33n | ||
| C6 | 4n7 | 4.7n | ||
| C7 | 1u | 1u | ||
| C8 | 4n7 | 4.7n | ||
| C9 | 100n | 100n | ||
| C10 | 100n | 100n | ||
| C11 | 10u | 10u | elec | |
| C12 | 100u | 100u | elec | |
| C13 | 10u | 10u | elec | |
| Diodes 6 | ||||
| D1 | 1N4148 | 1N4148 | ||
| D2 | 1N4148 | 1N4148 | ||
| D5 | 1N4148 | 1N4148 | ||
| D6 | 1N4148 | 1N4148 | ||
| D7 | 1N5817 | 1N5817 | ||
| D8 | 1N4148 | 1N4148 | ||
| Transistors 2 | ||||
| Q1 | 2N5088 | 2N5088 | ||
| Q2 | 2N5088 | 2N5088 | ||
| ICs 1 | ||||
| IC1 | 4558 | 4558 | ||
| Potentiometers 4 | ||||
| BASS | 50KB | B50k | Potentiometer | |
| GAIN | 1MB | B1M | Potentiometer | |
| TREB | 50KB | B50k | Potentiometer | |
| VOL | 100KB | B100k | Potentiometer | |