Aion Fx Eclipse Preamp 9v/-9v

 Schematic is avaiable HERE.

 

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 also included some useful mods such a Depth control for the LFO and two trimpots to fine tune the LFO and the sweep of the wah pot. Build docs, schematic and setup guide HERE.

And HERE is the stock schematic.

 

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.

Korg MS-20 Filter 9v

A slightly modified Korg MS20 Filter which runs on 9v.

Korg / Yamaha TNB-1 Tone Booster

Korg OVD-1