@Dynodon
Don, have you considered to rectifie the HV AC signal (Vpp) from the resonating STEP-UP transformer?
Then we could have HV pulsed DC (+POS) signal.
This signal is going through the HV DIODE (De-Q-ing diode???
) and into the (L1-L2) CHARGING choke.
I think full HV rectifier bridge could work, since we GATE this signal to CHARGE it with only DC (+POS) potential.
If this works with DC(+POS) voltage, it could also be equal opposite DC(-NEG) voltage.
br,
Webmug