Wah
Foxx Wah Inductorless
Foxx sold a couple of wah variants in the early 70s, often combined with a Foxx Tone Machine circuit. There was an inductorless version and a Cry Baby variant with a 4 posistion “Wah Tone” selector switch. This layout is for the inductorless version. HERE is the schematic.
Colorsound Vocalizer
A rare bird in the Colorsound range. Some additional mods can be made. Replace the 3,9k resistor with a 10k pot for a Freq control. And try a PNP Germanium for Q1 which smoothens the feel of the formant filter.. Schematic is avaiable HERE.
Ltava Fuzz Wah – modified
The fuzz and wah section of Ltava Fuzz/Vibrato/Wah multi effects pedal manufactured in Ukraine in the early 80s. The LFO section was left out simply because the layout would be too big. The internal trimpots is taken out on the outside for external gain controls. And a onboard voltage inverter was added. Schematic: … Read more
Tesla AYZ-025 Fuzz Wah
There is a layout for the fuzz section in library but here comes the whole package with the inductorless wah circuit ryincluded. The wah pot can be wired as a manual panel mounted “bandpass filter” tone control or wired through an expression jack. The fuzz section is based on Foxx tone machine but there is … Read more
Korg FK-2 Mr. Multi
Another weird one! A rotary selector selects between a four stage phaser, wah and phaser and wah combined. The latter mode is supposed to be something out of this world. Deadend Fx (who else) have a projects for this beast and as usual, don’t hesitate to support these guys by bying some nifty PCBs. They … Read more
Keio Synthesizer Traveler F-1
An old, obscure, weird fuzz/wah/filter/noise/volume pedal from Japan dated from the the early 70s. Schematics and more info HERE. Note that a couple of resistor values was is incorrect in the original schematic but it has been corrected for the layout below.