Chua Chups

Buoyed by the success of the Accutronics reverb I decided to revisit one of my earliest DIY experiments.  This is a Chua oscillator that I started playing with back in April 1999. I rebuilt the original circuit substituting a TL072 for the two LM741s, then added some voltage control elements from a second version I started in 2000/2001. I'm quite happy with this version, so it's finally going to get a panel...