Nelson showed his new circuit. looks like he reused some of his old parts.
What I noticed: L2 and L3 can be step up, but also can be step down. He showed step down voltage, which he called step up, as the current is increased. This means, L2 Has many turns, L3 has few turns (but ticker wire)
He also uses L3 in th middle of the stack, which makes sense. one side gets to see L1 (magnetic field) the other side L2 (series resonance with discharge).
L2 reduces the current draw of L1 when coupled (and working). 12V 0.62A uncoupled 0.25A when coupled. thats 0.36A less current draw.
All coils were clockwise. L3 had no capacitor, so this is pure to find the max current. Later will be tuning L3 for max voltage resonance and power.
He connected a car headlight to L3 and it lit up bright. he used his hands, so no high voltage. He also used another coil on top of L2 (3 coil stack) and used a bulp to light it up. So L3 can be inside and outside of the stack as long as it sees L2.
The " floating ground" is simply a battery that powers the pulse generator. So that mystery has been solved...
The car battery acts as a floating ground, as the source turns negative from the back emf.
It looks like C4 is a big capacitor. and C5 is the series resonant capacitor!!!
he pointed out the cap that is series resonant, and its near the power supply and mosfet, and C1....
Until now I made C5 large, and C4 tuned the series resonance... but it seems to be reversed.
I might need to make a NE555 timer, that can work on some batteries to connect to the floating ground, but for now Ill keep using the pulse gate drive transformer.