I made new tests today
Now the configuration is 120 turns on the primary
220 turns secondary
22 turns non dissipative snubber coil
22 turns feed back input coil
I added a 1kohm resistor as a load
The resistor get very hot. the voltage peaks at the resistor seem to be 50v
I think that now is important to get impedance matching to be able to extract energy from the coil…