Moo-Tron Auto Filter

From the vendor

NOTE: There are a limited numbers of kits avaialble with the required vactrols - they're now obsolete so stocks will become very difficult to source. All the funk in the universe, compressed into a 1590BB and unleashed on your signal. Dig out any of your 70's vinyl with whakka whoop wha filtering on it (Zappa, Bootsy, Wonder, Santana....) and you can bet your bellbottoms its coming from the original box this is based on. Bass, guitar, keyboards... they all love this pedal. Lots of controls to play with in this modernised version, including a Gain control to get your input signal just right (as auto filters like the signal just so) and a master volume to balance your level once you've messed with the gain. Volume can be set with an internal trimmer instead of a pot, but you'll have a strange control layout unless you wire up your pots instead of using vertical-pin board-mounts. We've tried our best - really - but we've not been able to find a roll-your--own vactrol that works well with this. Most of the LDR-LED combos we've tried will produce good results across some of the settings, but nothing works across the full range of the circuit's capabilities. You really need a pair of VTL5C3 vactrols to get the best from this box. Kit is offered with or without the vactrols in case you want to try to get hold of some cheaper. We won't lie - they're becoming harder to source, especially at reasonable prices, but the results are worth it. Thonk are your best bet in the UK. The kit is supplied with vertical-mount pots which have round shafts, so you'll need set-screw fitting knobs. Pot spacing is 20mm, so you'll need knobs smaller than that. 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: Mu-Tron Mutron III Difficulty: Medium PCB size: 80 x 60mm Knobs required: 4/5 Enclosure: 1590BB Direct-Connect compatible (4- or 6-way) Please do not attempt this build unless you're confident in your building and troubleshooting abilities. We cannot offer any support with this kit. Download the INSTRUCTION PDF