Right, that's where the EE's should step in in my opinion.
Dear Itsu and the EE's.
Just a slight lateral think thing !! Could this device be a compact Slayer type device ?? I have attached a circuit below that might help in getting the device to oscillate if nothing else !!
Let us consider the circumferential winding to be L2 ( Tesla style primary ). Wound over and at 90 deg to, is L1 ( A lot more turns secondary ).
Finally the third coil wound over the other two as a pickup coil with suitable Diodes / Transistors to feed back to the start capacitor.
IMO I think this coil we see was a failed attempt at a TPU but Roman found a way to make it into something else that worked !!
Ok I think I have travelled sideways enough.
Thoughts anyone ??
Nanny state ? Left at the gate !!