THE RADIO WORLD,

Wairarapa Age, 16 March 1933, Page 7

THE RADIO WORLD,

WIRELESS NEWS AND NOTES.

The French authorities are introducing legislation with a view to elimination of all forms of electrical interference with radio reception. It is a bold step, and it will make the sale of apparatus not effectively silenced, an offence. Other countries are intent upon observing the effect with a view to the enactment of similar legislation.

A new feature introduced in railwaytrain wireless has been effected on the. Scottish express. Special records with descriptions of the districts traversed will be put on at appropriate times. Old buildings that may be seen on the journey and locations rich in history, will be authoritatively described as they are approached, and between times, broadcasts or gramophone music will be given to the passengers.

Shanghai has nearly 30 broadcast stations operating on wavelengths that appear to satisfy the owners of the transmitters. Control of broadcasting is conspicuous by its absence, and much clashing and jamming results. Many of the transmitters are operated by wireless firms, and because of the chaotic state of China wireless is more a nightmare than a boon in Shanghai.

Kenya Colony possesses a white population of roughly fifteen thousand, and for its entertainment daily broadeasts are conducted. To defray expenses of this service listeners pay £2 10s per annum. For special occasions local talent is sometimes employed, but the fare is chiefly provided by gramophone recordings. Biebroadcasts of European stations are made occasionally, but static is too prevalent for release to be placed on such broadcasts.

The United States sanitary authorities, according to a report, -have invented a radio trap for mosquitoes in malarial districts. The insects are attracted by a high-pitched buzzer tone produced by an oscillatory circuit, the exact note of a mosquito in flight. When swarms of insects are collected they are destroyed by an electric furnace. A description of the apparatus .was recently given over the National Broadcast network.

Television enthusiasts in England have reported excellent reception of pictures broadcast from Russia. The images are “stills’'’ and consist of posters) portraits of Stalin, and other propaganda pictures, and though distinct, are inverted, ’as Russian stations use the vertical scanning process.

A micro-ray equipment to give radio communication in the cross-Channel aviation services has been established in England and France. The transmitters are to be used for ’planes not in the regular passenger service, and an aviator leaving either country will be reported in order that the authorities in the country of destination will be able to keep a sharp look-out for the expected aeroplane. A great advantage of the use of micro-rays is the fact that they are almost entirely unaffected by atmospheric conditions.