Sentence examples for radiotelegraph from inspiring English sources

The first sea rescue after a distress call sent by radiotelegraph took place in 1899, when a lightship in the Dover Straits reported the grounding of Elbe, a steamship.

A landmark transmission came in 1918, when a radiotelegraph message from the Marconi long-wave station at Caernarvon, in Wales, was received in Australia, over a distance of 11,000 miles (17,700 kilometres).

Extensive efforts were made to use radiotelegraph and radiotelephone between the airplanes and ground headquarters.

This event was followed by the Berlin conference of 1885 to discuss international telephone communications, two further conferences in Berlin in 1903 and 1906 on radiotelegraph, and still another in London in 1912 to cover the whole field of radio communications.

The Washington Conference of 1927 widened the area of cooperation in respect to radiotelegraph, broadcasting, and the international allocation of wavelengths, or frequencies.

Frequency bandwidths also are allocated, ranging from 300 hertz for radiotelegraphs to 10 kilohertz for voice-grade radiotelephones to more than 500 megahertz for multichannel digital radio relays in the telephone network to about 850 megahertz for cellular telephones.

The International Telecommunication Convention of 1932, which merged the International Telegraph Convention and the International Radiotelegraph Convention, provided that the International Telecommunication Union would succeed the International Telegraph Union when the convention became effective in 1934.