“This was a project I didn’t get round to!
It has the common fault where it plays the same note whatever key is pressed.
I’ve checked the keyboard and it’s ok, no dead resistors and all keys work.
For the technically minded, it’s quite likely the LF353 chip known as U12
All the other controls and both oscillators, and the filter etc are working as expected.
I’ve given a good clean inside and out, damp cloth only
As you can see, one control knob has gone missing, as have some of the small screws securing the base
Otherwise in good condition, kept indoors in its original box, although there’s only one polystyrene packing piece” Click here to visit listing on eBay