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

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Signal Corps Mobile Television System By JOHN S. AULD The U.S. Army Signal Corps* mobile television system is briefly described. In this system five vehicles — a transmitter bus, transmitter power bus, receiver bus, receiver power bus, and kinescope recording bus — are used to provide a complete television unit designed to meet training and operational requirements of the Army. I N 1948, when television began to pass from its embryonic stage, the Army decided that it might be employed to answer some of its tactical and training problems. Television had been used during the latter phase of World War II on an experimental basis, using highly specialized nonstandard equipment, with excellent results. The question arose as to what units would receive television equipment, what type, and how would it be employed? It was decided that the most practical and economical method of answering these questions was to design one complete and self-contained system on wheels. This unit could then travel from post to post stimulating thought, and showing field commanders of the Presented on October 7, 1952 at the Society's Convention at Washington, D.C., by Sgt. John S. Auld, Technical Director, U.S. Army Signal Corps Mobile Television System, Signal Corps Photographic Center, 35-11 35 Ave., Long Island City 1, N.Y. various branches of service (i.e. artillery infantry, etc.) how television might solve some of their particular problems. The information obtained from these demonstrations would then form the basis for specifications of specialized equipment to meet these individual needs. This was the inception of the Signal Corps Mobile Television System. The Transmitter Bus The basic layout of this vehicle is quite similar to that of the average commercial remote pickup bus but, because it has to provide all the station programming facilities, it is much more elaborately equipped. This unit houses three, RCA Type TK-30A, field camera chains. The camera controls and power supplies are placed console fashion across the rear of the bus. Behind this operating position there are five cable reels. Four of these carry 250 ft of camera cable each; the fifth, 1700 ft of microphone cable of various convenient lengths. 462 December 1952 Journal of the SMPTE Vol. 59