Radio broadcast .. (1922-30)

Record Details:

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Progress of Radio in Foreign Lands 79 stations are intended for internal communication, as the colony has no organized telegraphic wire system. WHILE Great Britain's radiophone broadcasting plans are still more or less in the air and will no doubt take quite a time before they crystallize into something like a definite programme, there is one outstanding fact that has been established since the very beginning: British radiophone enthusiasts are going to use British-made receiving sets. The companies which are to carry on broadcasting in Great Britain are going to see to it that no German or any other country's receiving sets flood their market to the detriment of home industry. Government aid has practically been pledged in this connection. Meanwhile British receiving sets are now making their appearance. The Radiophone sets follow American practice quite closely; indeed, one line of sets practically parallels a well-known American line, using the designations "Junior" and "Senior" to indicate the difference between crystal detector sets and vacuum 'tube sets. A crystal receiving set, with telephones and single tuner control, sells for the equivalent of twenty dollars, complete with antenna wire, insulators, and ground connection. A vacuum-tube set makes use of two tubes — one as a detector and the other as an audio-frequency amplifier. The "B" or plate battery and the filament storage battery are contained in a separate acid-proof wooden case. The "B" battery is adjustable by means of a multi-point switch. The set complete with batteries, antenna materials, telephones, tubes and so on sells for.the equivalent of one hundred dollars. PLANS FOR ENGLAND'S MOST POWERFUL STATION THE new transmitting station which the British Government proposes to erect at Bourne, near Spalding in Lincolnshire, in connection with the Imperial Wireless Chain, will be the largest yet constructed in the British ONCE SEARCHLIGHTS, NOW LOUD SPEAKERS These horns, used during the war to illuminate an English flying field, have been converted into amplifying horns for broadcast reception Isles. There will be eight steel masts, each 800 feet high. Owing to the fact that steel is a conductor, and therefore liable to cause loss of electrical energy, the masts will be insulated in sections, and will stand on an insulating base. They will be guyed to concrete anchorages and will be designed to take a horizontal pull of ten tons at the top and a wind load of 60 pounds per square foot. The masts will be arranged in the form of a square, in the centre of which will be located the transmitting station. The apparatus will consist of vacuum-tube transmitters capable of transmitting continuously at 90 words per minute for reception in Poona, Johannesburg, or Perth. The new receiving station at Banbury, which will represent the other terminal of the Imperial Chain, will be built on similar lines to the station already in existence there in connection with