Secret Radio

Radio Record, Volume IV, Issue 39, 10 April 1931, Page 5

Secret Radio

Amazing Invention: A CABLE message from London eonveys the news that secret radio transmission has | been promised by the French of a new, ultrashortwave system. ‘This was demonstrated by Post Office officials who conversed from the Cliffs of Dover with French engineers at Calais with a wavelength of 18 centimetres, (The lowest wave now is about 10 metres-60 times as long.) The transmitting and receiving aerials are less than an inch long, and the amazingly low power of half 4 watt, which is barely sufficient to light a flashlight bulb, is used. The discovery is known as "microray," and its essential principle is 2 guarded secret. Briefly, speakers’ voices are converted into a ray which ig concentrated by two reflectors into a fine pencil ray, which behaves in 2 manner similar to that of light. It is thrown into space and picked up by an associated apparatus at the other end, The success of the experiments envisages the complete disappearance of : expensive, tall aerials and elaborate stations, and the end of the present serious congestion of the ether. Also, it presages universal radio telephony at a relatively small cost, and the intense development of television, which is brought within eommercial grounds. The "Morning Post" says the presence of numerous foreign high officials reveals the interest aroused.