Radio Round the World

Radio Record, Volume III, Issue 6, 23 August 1929, Page 10

Radio Round the World

AN American taxi-cab company is 7 tryitig out a. very ambitious scheme, that of providing each taxi -with a wireless receiver, with the idea that if a man wants a cab and cannot find one, he telephones to the company, who thereupon broadcasts a call to the taxi which is supposed to be nearest the client. What happens if the et

aforesaid taxi is ‘engaged is not stated. Obviously, even if he hears the call he cannot answer-except under his breath, . QNE of Switzerland’s blind spots is at last to receive the light of broadeasting. The district affected is the canton Tessin, which is an Italianspeaking part of Switzerland. The transmitter has ‘been built on Mount Ceneri and local steners are now able to hear . programmes relayed from other Swiss stations. However, the new. station is engaged in building a studio to provide its own programmes. HE Detroit police have been successful in effecting 605 arrests in the last three months, thanks to the radio equipment installed on their eight patrol .cars, Some of these ar‘rests were effected 30 seconds after the information was sent out.

Two German trans-Atlantic air lin- ' ers are soon to be equipped with receiving apparatus of a kind that will make it possible for passengers to have an illustrated paper published on board. _ LARGH motor manufacturing concern in the United States has designed a model: de luxe which carries a receiving set. No part of the set is visible at all. except a small loudspeaker. The serial is hidden-in the roof of the car, andthe directors report that the innovation has proved very successful, , ‘ N a recent American, Radio Hxhibition great interest was aroused over a table-erand player-piano, which had:

combined with it an all-electric radio set and gramophone, However, .the price of this unique combination is well outside the range of the average man’s pocket. . HE new broadcasting house in Munich is said to be the most luxurious in the world. There are five studios in a snupygurenuqeqnereyevevern rv PTOTNHEUEUNVOUEUEEUU TI UTUATRERSTVERTEAUEVEGT UTA"

all,.each specialising in some different type" ‘of broadeasting. One of thesecertainly a siovelty in broadcasting-is an open-air studio, which has _ been gravelled and laid out in flower beds’ in order to be more sound absorbent. This studio specialises in chamber music, . ‘XPERIMENTS are being carried out with regard to the Warren system of metalling non-conductive substances. This method is being employed in making the internal screens in valve sets, and has this great advantage, that the close incorporation of the film and the base makes it almost impossible for peeling to take place even in the most variable of temperatures. SEN SATIONAL developments are reported in connection with television experiments ‘made by Professor K. Takay anagi of Japan. The apparatus

constructed by him is far superior to. any other known set, and the inventor hopes. soon to be able to Broadcast a whole picture from the theatre. (SANADIAN navigation, which has ‘hitherto employed the siren as a signal in dense fogs, has had this in-. strument replaced by radio sets. They tire so equipped that they.can, day and night, inform nearby ships of their exact position, The Department of Navigation Affairs in Ottawa -prophesies that in 20 years hence the noise of the siren will be but a thing of the past. . At the studio in Munich there are employed three microphones, one . for the first violins, one for the second violins, and the third is placed at a certain distance from the whole orchestra, The result is.said to be a vast. improvement on the single microphone, se THE Hotel :Cartatet, situated in the. heart of New York, has. now been equipped with a Baird television apparatus. This hotel is the first public establishment to-have such an installation. Preliminary experiments havebeen found to be successful, and the images have been reproduced correctly. ALTHOUGH the population of Italy is nearly 40,000,000, there are only 51,000 licensed listeners, This shows an increase on the previous year of 10,000, but even now Italy is second from the bottom in the list of countries with their listeners graduated per céntum. She is beaten for bottom place by Rumania, who seems loth to encourage radio. A MIDGHT radio transmitter weighing slightly more than a portable typewriter and occupying less space, has been devised for the use of flyers by experts of the United States Coast Guard. This machine is at present being tested by the American Aviation Office, and if the experiments are suc> cessful it will become a part ‘of the equipment of all coastguard seaplanes. A RECENT déyelopment in American radio is the introduction of radio in schools, The State of Texas seems to be the furthest advanced, as it is reported that radio there takes the place. of teachers altogether. In this state there is a great scarcity of members of this profession, but™it would seem that this substitution would be of little use, since in teaching, at least, © the personality of .the teacher is the ‘niece de resistance" of education, and surely the loudspeaker is a poor substitute for this, -------eeEeEeEeEeeEeEeEeEOEe

PEE ee Ec a OF SPECIAL INTEREST. Our ‘issue of September 20 will be a SPECIAL ALL-ELECTRIC number. This will be of outstanding value to all constructors * and owners of all-electric sets. Three articles will be of outstanding interest :- 1. The full construetional details of an all-electric receiver. 2. Details of how.to construct an A.C. push-pull amplifier to work from any set or pick-up. 3. Changing over the set from D.C. to A.C. operation. Remember the Date, and. Secure Your Copy: SEPTEMBER 20. MTT TTT TTT INT TTT!