OPEN QUESTION: winding sense of chokes 56/62 is undocumented — paraphase (flux-cancelling) vs aiding, and the LCR test that settles it

RAISED 2026-09-20, #neuralstan20-testing, with SOS Productions (Figure 8XA) and Scotchn (SCR CDI deck).

THE GAP. No Meyer document specifies the WINDING SENSE of the bifilar resonant charging chokes 56/62. Figure 8XA (WFC Memo 420 p.1-6, "VOLTAGE INTENSIFIER CIRCUIT (VIC)", (c)1981) draws the pair as a single coil symbol over one magnetic induction core. The 422-era Fig 3-22/3-23 sheets and the Memo 426 Fig 7-1 sheets are no better. The narrative says only that 56's field "crosses over and passes through electrically ground connected Resonant Charging Choke (62)" (Memo 420 p.17, in the WFC Independent Test-Evaluation Report) and that the paired coils cause "voltage level enhancement beyond applied voltage input" via distributed C / distributed L (Birth of New Technology, "Propagating Electrical Stress"). Neither statement fixes the sign.

WHY IT MATTERS. 56 sits in the drive leg, 62 in the return leg, cell between them. Loop current therefore traverses the two windings in opposite senses around the core unless one is reversed at its terminals. For the series loop:
aiding L_eff = L1 + L2 + 2M = 2L(1+k) -> ~4L at k=1
paraphase L_eff = L1 + L2 - 2M = 2L(1-k) -> ~0 at k=1
A 9:1 to 10:1 spread on the single most consequential tank parameter.

THE TRADE (my analysis, not documented by Stan):

• AIDING maximises series reactance = maximum amp inhibiting, which is Stan's stated purpose for 56/62. But the core then sees the full mmf and saturates early.
• PARAPHASE cancels most of the core flux (80% at k=0.8), so the core tolerates far more current before B_sat, at the cost of most of the inductance. Lower L also means faster ring, higher dV/dt at the plates, higher peak current (I_pk = V*sqrt(C/L)). These two goals pull in OPPOSITE directions. The sign of k is where a builder chooses between amp inhibiting and saturation headroom; one pair cannot deliver both.

CAUTION recorded: a bifilar pair bracketing the cell CANNOT separate leakage current from displacement current by mode - in a simple series loop both take the identical path through both windings. Separation is by RATE only (fast dV/dt couples through the pair's distributed capacitance; slow conduction faces the full reactance). Mode separation would require a different topology.

THE TEST THAT SETTLES IT. Scotchn's 28-pancake stainless bifilar chokes measure 39.48 mH each (notebook #3387, #3388, bench 2026-09-13) and are wet-wrapped in epoxy, i.e. the geometry is fixed as wound to spec. Measure the SERIES PAIR at the cell terminals with the cell disconnected:
~158 mH => aiding
~16 mH => paraphase
Ten times apart; any LCR meter resolves it. Because the build follows Stan's winding spec, the result is the closest thing available to an answer from the hardware where the documents are silent.

STATUS: measurement requested from Scotchn, not yet returned. Do NOT present paraphase as Stan's documented intent until this reads out.