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Figure 12 shows the projection booth equipment consisting of the projector control rack on the right and the monitor rack on the left. The units of equipment from top to bottom are: the projector control, the signal selector, the horizontal deflection amplifier, the 300v regulator, and the high-voltage control panel. The picture monitor is the top unit in its rack; below the receiver for off-the-air reception, the vertical deflection amplifier, the 400-v, 400-ma power supply and the 400-v, 800-ma power supply. Several of the units of this equipment have not been described because of their conventional design.
The projector is shown in Fig. 13, an external view of the completed unit ready for installation on the theater balcony face.
Theater television as an entertainment medium has now reached the stage where a practical commercial equipment has been produced. To date, nine installations of the PT-100 equipment are in operation. The problems now he with the industry in the field application: the best way to transmit the program to the theater, the type of
programming best suited for this new medium, and, most important in the long view, how will picture quality best be maintained from the program subject through the long chain of electronic events before the picture image is viewed on the theater screen? Every effort, in the design of the PT-100 equipment, has been concentrated on building a quality product engineered for present-day use, and providing for standards which may be expected in the future as the needs of the industry are crystallized through the SMPTE.
Bibliography
I. G. Maloff and D. W. Epstein, "Reflective optics in projection television," Electronics, vol. 17, pp. 98-105, Dec. 1944.
0. H. Schade, "Electrooptical characteristics of television systems," RCA Rev., vol. 9, nos. 1^, pp. 5-37, 245-286, 490-530 and 653-686; Mar., June, Sept. and Dec. 1948.
1. G. Maloff, "Optical problems in largescreen television," Jour. SMPE, vol. 51, pp. 30-36, July 1948.
R. V. Little, Jr., "Developments in largescreen television," Jour. SMPE, vol. 51, pp. 37-42, July 1948.
Ralph V. Little, Jr.: Theater TV Equipment
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