Instant Spacemen 3! Just add fuzz and wah.
Quirky little box of fun. The original was a box that plugged straight into the guitar jack socket. Sound? A reverse-sawtooth tremolo-type affair. Very choppy.
Stock, it cuts the signal completely between 'beats', giving the percussion effect the name suggests. This version has an optional depth knob to tame that chop and give a wider range of effect. It has also been updated for more output, and has an internal volume trimmer to set it to unity (or over, or under, as you wish).
Also added is a switch to change the speed range available. At higher speeds it sounds almost ring-mod-ish. Also included is an extra input capacitor so you can go with the original thin tone or a normal, full range tone.
Kit comes with a tested 2N2646 (the UJT transistor that does the magic).
The latest version of the PCB has board-mounted pots, optional board-mounted micro-toggle switch (or you can wire a normal switch offboard), and the option to use a cheap, readily available PUT instead of the 2N2646. The PUT option gives the same sounds, but the speed control locks open at the extreme end of the turn, hence we only supply the kit with the stock 2N2646. Due to the nature of the effect you may get some thumping or ticking in your signal. Nature of the beast.
If you go for the micro-switch option the build requires some very neat soldering as the switch mounts over the top of some solder pads. It's easy enough, but not one for a beginner. A standard toggle switch has to mount above the pots as shown in the images.
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 only available with full kits, and will take a battery. Knobs are not included.
PCB size: 50 x 22mm
Knobs required: 2
Direct-Connect compatible (4-way)
If you want the kit pre-built you must add the enclosure option below and select your knobs in the Components section. Check Specials for powder-coated enclosure availability.
Download the INSTRUCTION PDF
Here's the older version.