FIG. 20YI Gas Resonant Cavity Schematic (1982, page G34): bridge > SCR tap-select toroid > Q9 gate > VIC step-up with grounded secondary > blocking diode > choke > cavity > wiper choke > ground

Read from scan posted by Scotchn, Discord #neuralstan20-testing 2026-11-04. Header "FIG. 20YI: GAS RESONANT CAVITY SCHEMATIC, Copyright 1982 by Stanley A. Meyer", page mark G34. Power path: 110 VAC 60 Hz input > full-wave bridge rectifier B3 (negative to ground; gated unipolar pulse waveform drawn on output) > TOROIDAL PULSING CORE, primary winding 400 turns 24 ga, secondary windings 100 turns per coil (24 ga) > SCR1-SCR4, each fired by its own H11D1 optocoupler with R1-R4, outputs joined at node 58 > Voltage Level Selector Switch (2V/3V/4V positions, 5 Vcc through 220 ohm to the chosen opto LED); note "Additional voltage level circuits may be injected as required" > Q9 (2N6676 or 2N6496) switched by an opto from a Variable Trigger Input (R5), gated pulse train drawn at collector > VOLTAGE INTENSIFIER CRK'T: primary winding 41, secondary pickup winding 42 (resistive wire), bottom end of 42 to GROUND > blocking diode 14 > resonant charging choke 43 (resistive wire) > 1/2 in dia S/S tube 45 inside 1 in dia S/S tube 44, Gas Resonant Cavity Ass'y with laser or light injection ports > resonant charging choke 47 (resistive wire) with WIPER ARM > ground. No variac: amplitude levels come from SCR-selected toroid windings. No extraction/amp-consuming load on this sheet (that appears on FIG. 20YID, page G39, notebook #3380). This confirms Scotchn's recalled chain (rectifier > SCR > grounded step-up > diode after transformer > choke > cavity > choke > GND) apart from the variac; corrects the framing in notebook #3514, which treated the grounded secondary as unverified. Note sheet numbering: Scotchn earlier placed the Gas Resonant Cavity at Memo WFC 420 Fig 1-19 (#3384); this 1982 version is FIG. 20YI. Toroid labelling (400 T primary vs 100 T per secondary coil) reads as a tap/level selector, which differs from the patent prose "toroidal pulsing coil provides a voltage step-up ... in excess of five times" (US 4,936,961); exact tap wiring not legible.