Master Ivo Replication part 3

Master Ivo Replication part 3
Murphys law hits again...we once got this special long negative going spike during the top hill of the sine Waveform..Then we just wanted to apply the L3 coil ontop of the L2 coil, but then suddenly there probably some parts touched each other and then suddenly this essential spike was gone... probably a diode or something else got blown...too bad, Burkhard could not find his other diodes anymore...P.S. This circuit is really dangerous, I got twice really nasty electrical shocks today, cause I was a bit tired and forgot, that after Switchoff the caps had really high voltage stored...be very carefull... After touching it, I was really awake again..lol..ouch... We will rebuild it again with new parts and maybe with a bootstrap circuit for the highside switching, cause it is annoying to always need the 12 Volts battery.. Please stay tuned for part 4...Regards, Stefan...