Word: antennas
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Dates: during 1930-1939
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...French text will be provided by Marcel Francon, instructor in Romance Languages; and the Italian, by Charles R. D. Miller '23, instructor in German. Professor Cross himself will prepare the German text. Their words will be shot into the ether via WRUL's new directional antenna, part of the equipment which makes the station one of the strongest shortwave units in the country...
Still hopeful, the engineers proceeded to the main experiment: a signal sent by remote control from a 100,000-watt transmitter 10 miles away at Hicksville, L. I., the antenna of which pointed toward Mars at an angle of 30°. By common consent, the "message" was a meaningless succession of dots and dashes. Astronomer Fisher and associates figured that if the signal traveled 36,030,000 miles and back at 186,000 mi. a second, the round trip would take 6 min. 28 sec. The key was tapped. For 6 min. 28 sec. everyone waited. Nothing happened. After...
...fact that the U. S. has quietly entered the short-wave news propaganda battle. Every day in the week for the past year and a half, NBC's 25-kilowatt W 3 XL, its power stepped up to the equivalent of some 150 kilowatts by a directional beam antenna, has sent in the direction of Germany's 5,000,000 shortwave receivers an hour of news, music and Americana calculated to reach Germans between eight and nine o'clock at night...
Chief purpose of any direction finder in transport flying is not alone to locate ground points but to help determine the plane's position in flight. After a ground station is tuned in on the ship's radio receiver in this new Sperry-RCA apparatus, a loop antenna suspended beneath the plane rotates automatically until it is at right angles to the source of the signal, registering the bearing on the dial. Where two or more such bearings intersect is approximately the plane's position...
What did these tricks was a "terrain clearance indicator,"'first practical development of a radio-run absolute altimeter. From a transmitting antenna on one wing, radio waves are bounced groundward, caught on the rebound by a receiving antenna on the other wing. The elapsed time interval is measured in millionths of a second at radio's speed of 186,300 miles per second, is translated into feet on the altimeter...