World Radio News

Radio Record, Volume IV, Issue 5, 15 August 1930, Unnumbered Page

World Radio News

A PRIVATE code and wavelength is ~ employed by the Ontario Provincial Police in their newly-established Wireless network. District police stations throughout Ontario are now linked tp by wireless with police heacquarters in Toronto... . % x * NEGOTIATIONS are in progress between the Indian Radio Company and the Indian Government with a view to establishing a wireless telephony service between India and Great Britain. It is reported that stich a service would be operated in England by the stations engaged in the transAtlantic and Australian services, ae x xe HE provision of a mechanical military band for drilling and marching purposes is the latest task to be entrusted to the Radio Corporation of America. The entire "band" will he carried on a three-quarter ton truck, Which will precede the marchin’ column at a slow pace while radiating marching tunes from amplified gramophone records. * 4 * OR the first time in American radio history a tax is to be levied on wireless receivers, South Carolina being the State to introduce this daring imposition. The tux amounts to fifty cents a year (about 2/-) on sets valued at fifty dollars. with proportionate increases according to value, It is reported that the proceeds are to be handed over to the hospitals. % "t m N2w ZEALAND shortwave enthusiasts will be interested to learn that the postal administration in Morocco has ordered 4 7 k.w. shortwave plant for the establishment of a regular telegraph and telephone service with France. According to an English contemporary, the French transmitter and receiver will be located at St. Assie and Villecresnes respectively. ht xd bd A FRENCH experimenter has produced a special portable transinitter for attachment to motor-cars, Working on one wavelength only, its sole function is to communicate SOS messages to the police when accidents occur. It is not surprising to learn that the French Post Office authorities are opposing the idea on the ground that it would lead to too many transmissions. te F) # HE nearest approach to radio warfare is a contest reported to be taking place between the Russian and Roumanian Governments. It appears that the Soviet has been broadcasting anti-Roumanian propaganda, and to counteract this the Roumanian Government has made preparations to "jam" the Russian station by means of ,a special interfering transmitter working on the same wavelength. = *x & ACCORDING to the finding of ‘the Leipzig Supreme Court, radio news is not copyright in Germany. This decision was given in an action brought against a newspaper proprietor whe had published a special edition report: ing the landing of the Graf Zeppelin at Takehurst, U.S.A. It was claimed

that this report was taken directly from a broadcast commentary on ihe event. . , ae Bo * THREE months’ transmitting license has been granted to a group of Washington engineers, who claim that they can eradicate bugs and other insects from apple orchards by means of low-frequency radio waves. In the tests now in progress, Wireless Waves are transmitted through the orchards eyery morning, the wave-\ length used heing about 38000 metresg and the poi'er, 10 kilowatts. t 5 ae % 2 ADIO telegraphy is a State monopoly in Mexico. Owing to the vast expanses of land in: the interior and the mountainous nature of the country, Which makes the laying and maintaining of telegraph lines extremely difficult, the Government makes extensive | use of wireless for the interior services. No fewer than 25 stations are employed to handle the commercial traffic, which has already attained the dimensions of over 22 million words pet month. ze & LLICIT transmitters in Paris have a new risk to face in the shape of a secret wireless network recently established by the police. Three directional receiving stations have heen erected outside the capital at points : forming an equilateral triangle. sy When illegai transmissions are suspect~ ed, their exact seurce enh be discovered without loss of time by means of cross-bearings. The ultimate "capture" is effected by policemen armed with directional portable sets. = % % A NEW system of television has been developed by Dr. Vladimir Zworykin, research engineer of the Westinghouse Electric and Manufacturing Company, New York. A cathode-ray tube is used as a receiver, and this gives the new type of television many advantages over the well-known scanningdise method. The inventor is said to be in a position now to discuss the practical possibility of flashing the images on a motion-picture screen so that large audiences may receive television broadcasts of important events immediately after a film is printed. a % % qt is reported by the United sia Navy Department’s Bureau of Ingineering that the use of shortwaves for transmission purposes between battleships is highly dangerous. The investigators discovered that they could light a 24-volt lamp by connecting it between the breech of a gun and the turret. They also found that the primer in the breech could be exploded by the generated current. As a result the naval authorities have prohibited the use of frequencies higher than . 4000 k.c. during target practice or refuelling. If the investigators’ fears are well-founded, surely the lack Chk accidents due to this unseen eause ~ should convince them that the danger, though always present, is only slight. To prohibit shortwave transmissions on these grounds only certainly appears these grounds only, certainly appears molehill."