Akashic Guitar effects PCB lookup
TONEGAINVOLPRES

1590B · 4 knobs

Fuzz Dog· Krunch

Box of Krunch

Based on the Crunch Box

Category
Overdrive· OD/Dist/Preamp
Controls
Tone · Gain · Vol · Pres
Difficulty
Medium
Price
£31.20
Tags
od-distortion

From the vendor

More Marshall-in-a-Box fun, and this one doesn't disappoint. Does what most of these kind of circuits do - give you the oomph of a fully cranked tube head. We've added some extras to this one though: • Presence pot - an internal trimmer on the original, now an optional (and very worthwhile) external pot. Highly recommended. • Clipping selection - added an optional board-mounted toggle switch and a couple of extra diode spots for alternatives to the stock LED clipping. Go nuts! We've also designed the board with Mark M's slightly modified tone control, but you can easily go back to stock with a single jumper wire. Please take note of the different box layouts. If you want a 3-knob version with centralised tone control you can only have this with wired pots. Please add a note when ordering if this is the case style you'd prefer. Clipping pack includes toggle switch, SIL sockets and a selection of extra diodes - 2x1N34A, 3x1N4148, 2xBAT46, 2x blue LEDs 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 enclosures. Please choose appropriate knobs. Inspired by: Crunch Box Difficulty: Medium PCB size: 50 x 40mm Knobs required: 3/4 Enclosure: 1590B Direct-Connect compatible (4-way) Download the INSTRUCTION PDF

Schematic

The schematic is in the vendor's build document, page 2. Open the build document. No KiCad fragment has been drawn for this circuit yet.

Parts list 31 rows

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RefValueNormalizedTypeNotes
Resistors 11
R11K1k
R21M1M
R31K1k
R410K10k
R51M1M
R61K1k
R7100R100
R810K10k
R922K22k
R1022K22k
R112K22.2k
Capacitors 10
C122n22n
C21n1n
C3100p100p
C4100n100n
C5100p100p
C639n39n
C722n22n
C92u22.2uelec
C10100u100uelec
C11100u100uelec
Diodes 5
D25MM5MM
D35MM5MM
D4YourYOUR
D5YourYOUR
D11N40011N4001
ICs 1
IC1LM833LM833
Potentiometers 4
TONE10KBB10kPotentiometer
GAIN100KBB100kPotentiometer
VOL100KBB100kPotentiometer
PRES20KBB20kPotentiometer