INVENTION OF RADIO VALVE RECALLED

Press, Volume XC, Issue 27501, 8 November 1954, Page 12

INVENTION OF RADIO VALVE RECALLED

DEVELOPMENT FIFTY . YEARS AGO ’ Fifty years age this month, Professor J. A. Fleming, later Sir Ambrose : Fleming, produced what was probably ; the most fundamental advance towards ‘ modem radio broadcasting. It was his « “oscillation valve,” the world’s first 1 k thermionic valve, which was the basis :££or its endless array of modern suc- ‘ cessors, from the valve for a pocket ’• hearing aid to the final amplifier of a Transmitter handling up to 200 kilo- • watts- of power. From the application ' of its principle we now have long- * distance land-line telephony, television, »’ wireless direction finding, and navi- • gational aids, aircraft control and land- ‘ ing systems, radar, public address sys- > terns, the modern cinema, the “elecb(onic brain.” and guided missiles. e'>Sir Ambrose Fleming died in 1945. ;a£ed 95. vafter a long career as a ‘«a«ehce teacher, professor of physics i 3&d mathematics at University ColNottingham, a scientific adviser. "Mid professor of electrical engineering at University College, London.