Abstract: Some recent experimental work (Pod,2001) implies that an electron cloud with external pulse from a superconductor(SC) can be generated at above approximately 500 kV. Also U.S. Pat. Nos. 593,138 and 4,661,747 imply that this can happen for nonSCs with rotating clouds of electrons above 500 kV. This can be done with a disk (?=90) conducting rapid rotator ? (can be mechanical rotation or superconductor electron rotation) for pulse though V=512 kV (giving charge polar angle oscillation d?/dt) which will experience a pulse according to: Impulse/m=k[?[V?(d?/dto)r sin2 ?/(1?V/512 kV)]]. The device thus contains a w rotating (r large) disk so ?=90° in sin2?, VHF oscillator for electron d?/dto, Voltage V near 512 kV in V.