Hi Mario,

One thing appears to be so and that is: during on pulse, cell + is hit with positive pulse. During off pulse, because of blocking diode, coil discharge goes in the SAME direction and doesn't reverse polarity so the cell + it hit with a SECOND pulse of same polarity.

I found the same thing about 3-4 years ago with a single inductor on pos side and diode, discharge is in same direction...I got no reversal in polarity..it was same as initial pulse. I deduced it was as if the switch is open before inductor so it can only go find ground - towards cell.

Same gain as the flat pancakes? I don't know. But if both coils are on 1 core, there will definitely be more strength in the field than 2 single coils. This is also a known with Bedini coils. 1 coil with 4 power wires is stronger than 4 individual coils. They all pulse together, there is a synergy and the sum is more than the parts. So, I would say in this geometry with these kind of coils, yes, there is a benefit.

page 7-1 in tech brief

VIC voltage circuit (60) utilizes copper wire-wrap to form Resonant Charging Chokes (56/62) of Figure (3-22) in conjunction with Switching Diode (55) to encourage and make use of "Electron Bounce" phenomena (700) of Figure (7-9) to help promote Step Charging Effect (628) of Figure (7-7) by preventing electrical discharge of Resonant Cavity (140 - 170) since Blocking Diode functions as an "Open" switch during Pulse Off-time;

The off pulse lets coil discharge towards the cap again so you get almost twice the bang for the buck. This seems to evidently help water cap prevent discharge by having that extra pulse keep the voltage up.

The open switch means that on the off pulse, it is the same as being disconnected so it has to go somewhere and finds its way to ground and the only way it can do that is by going towards the cell.

Switching Diode (55) of Figure (3-22) prevents Bidirectional electron flow (current flow in one direction only) since Blocking - Diode (55) only conducts "current flow" in the direction of schematic-arrow while being placed in-line with VIC Circuit impedance interaction (R1 + Z2 + Z3 .•. Re), as mathematically extrapolated in Circuit Equation (Eq 9) ... Diode (55) being placed between Secondary Pickup Coil (52) and Resonant Charging Choke (56) to act as an electronic switch in open-position during pulse off-time (T2) of Figure (7-8) while preventing electron flow in reverse direction when Inductor (L1) collapsing electromagnetic field (FLl) produces another unipolar pulse wave-form ( 64a - 64b) ... producing unipolar voltage wave-form (64a xxx 64n) during repeated pulse-signal (46a xxx 46n) on-time (Tla xxx TIn) ... allowing the formation of an gated pulse- frequency pulse-train (64a/64b - T3 - 64a/64b) when pulse off-time (T3) is greater than time-period (T2) ... input-signal (49a xxx 49n) being a Pulse-Train where (T2) pulse offtime (T2) is adjusted to allows Unipolar Pulse-Train (64a xxx T3 xxx 64n) ... outputting Voltage-wave signal (64a xxx 64n) being a pulse-frequency doubler due to Inductance Reactance (FL) of Inductor Coil (56) of Figure (3-22) when collapsing magnetic field (FI) of Figure (7-3b) re-cuts coil-wrap (Ll) during each pulse off-time (T2) ... producing a second unipolar voltage wave-form (64b) during the rise and fall of magnetic field (71), as further illustrated in (620) of Figure (7-1).

MAN! He is long winded...

So we know

1. Diode keeps potentials and current in one direction only acting as switch to "disconnect" inductor from circuit on off pulse.
2. Diode is obviously between secondary and charging choke
3. Collapsing inductor causes UNIPOLAR pulse..so polarity stays same in the forward direction.
4. Collapsing unipolar pulse is "pulse-frequency doubler" so cell gets 2 pulses for 1 pulse input.
5. Sounds like when off time exceeds on time, off time is adjusted to ensure that the unipolar pulse train continues with consistency.

The first reference of bifilar in the tech brief on page 6-3 states:

"Resonant Choke Coils (56/62) of Figure (3-23) (Memo WFC 422 DA) are composed of 430F or 430FR inductance stainless steel film coated (hi dielectric value) wire (typically .004 Ga. or smaller) which are axially (spiralled) Bifilar wound about core bobbin (502), forming individual spiral-wrap (inner to outer circumference and being equally-length) coils (501a xxx 501n) electrically connected in sequencial order to form resistive pickup coil (503)."

Sounds like bifilars are definitely connected in sequence.