Via adafruit:
http://www.adafruit.com/blog/2010/11/05/korg-publishes-schematic-of-monotron-synth/ (http://www.adafruit.com/blog/2010/11/05/korg-publishes-schematic-of-monotron-synth/)
You'll notice that it's incredibly similar to a Gakken SX-150 ;-)
EEhh MMMmm....that is a very nice picture!!....as soon as i finish my Apc..i'll start that!! ::)
simon, let me know when you do! it looks like my budget will not allow me to get one for some time. soon i hope.