GreaSi Box

Silicon version (i.e. much easier to source and to fettle) of a fantastic germanium fuzz box, giving what's been described as a 'greasy' fuzz tone.

The original has fixed resistors for the transistor biasing, and we think it mostly works. We've gone for a trimmer on the base of Q1 as standard, which is one spot that makes this sing or fail. Since we know some of you like to tweak more than others, we've added spots for another couple of trimmers for more baising and gain level. Choose those in the options below if required.

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 can take a battery if desired with footswitch positioned 22mm higher, closer to the controls. Knobs are not included.

Builds are only available with full kits including enclosure. Please choose appropriate knobs.

Inspired by: GreaseBox GB-83

Difficulty: Easy

PCB size: 50 x 25mm

Knobs required: 2

Enclosure: 1590B

Direct-Connect compatible (4-way)

Download the INSTRUCTION PDF