“ THE CREATION AND BEHAVIOR OF RADIO WAVES “ 1942 U.S. ARMY SIGNAL CORPS TRAINING FILM XD13914

Want to support this channel and help us preserve old films? Visit Visit our website This 1942 black and white, partially animated film was produced by the U.S. Army Signal Corps (USASC) during in collaboration with the Chief of Air Corps explains “the creation and behavior of radio waves” and antennas during the WWII era (TRT: 10:47). Opening title card: “Official War Department Training Film 1-474 Restricted” (0:06). A large radio tower extends high into the clouds. Title appears: “Radio Antennas” (0:19). A transparent dish atop a radio tower (0:37). A radio transmitter on the underside of an aircraft. Two more atop an airplane. A vertical antenna pole on a small plane (0:41). Three radio towers stand in an open field (0:49). A compass is held open near a wire. As the compass approaches the wire, the needle rotates (0:52). Animation: A series of concentric rings with clockwise arrows encircle a black pole and pulsate. Then again, with counter-clo