Journal of the Society of Motion Picture Engineers (1930-1949)

Record Details:

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high-voltage feed through bushing connecting the circuit to ground. A lock on the cover gives added safety so that unauthorized persons cannot tamper with the equipment. High voltage is supplied from a unit designed to furnish the 80,000 v for the accelerating anode and also to furnish the focusing voltage of approximately 18,000 v. The high-voltage supply is designed for remote operation and can be placed in a power or generator room near or adjacent to the projection booth. Two high-voltage cables lead from the supply directly to the projector and the control circuits are connected to the control rack in the projection booth. The schematic diagram, Fig. 4, shows Fig. 3. PT-100 Projector, cover removed. March 1951 Journal of the SMPTE Vol. 56