“This is a Plan B Model 15 Complex oscillator Rev 1.3. It’s a triangle core oscillator with a design inspired by the Buchla 258.
I am the original owner of this module. It’s in perfect working order. Just a heads up, this is the Mk1 version so it doesn’t have protection if you connect the power the wrong way. Also, you’ll need to have a slightly deeper case as the circuit board sticks out about 4inches. It’s a great module with a thicker sound and I’m a little sad to say goodbye to it but I don’t really use it anymore. ” Click here to visit listing on eBay