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Wireless telegraphy or radiotelegraphy is transmission of text messages by radio waves, analogous to electrical telegraphy using cables. Before about 1910, the term wireless telegraphy was also used for other experimental technologies for transmitting telegraph signals without wires. In radiotelegraphy, information is transmitted by pulses of radio waves of two different lengths called "dots" and "dashes", which spell out text messages, usually in Morse code. In a manual system, the sending operator taps on a switch called a telegraph key which turns the transmitter on and off, producing the pulses of radio waves. At the receiver the pulses are audible in the receiver's speaker as beeps, which are translated back to text by an operator who knows Morse code.
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David Sarnoff was a Russian and American businessman who played an important role in the American history of radio and television. He led RCA for most of his career in various capacities from shortly after its founding in 1919 until his retirement in 1970.
Ronald Egan Randell was an Australian actor. After beginning his acting career on the stage in 1937, he played Charles Kingsford Smith in the film Smithy (1946). He also had roles in Bulldog Drummond at Bay (1947), Kiss Me Kate (1953), I Am a Camera (1955), Most Dangerous Man Alive (1961) and King of Kings (1961).
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The history of broadcasting in Australia has been shaped for over a century by the problem of communication across long distances, coupled with a strong base in a wealthy society with a deep taste for aural communications in a silent landscape. Australia developed its own system, through its own engineers, manufacturers, retailers, newspapers, entertainment services, and news agencies. The government set up the first radio system, and business interests marginalized the hobbyists and amateurs. The Labor Party was especially interested in radio because it allowed them to bypass the newspapers, which were mostly controlled by the opposition. Both parties agreed on the need for a national system, and in 1932 set up the Australian Broadcasting Commission, as a government agency that was largely separate from political interference.
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John Graeme Balsillie was an inventor, communications engineer, wireless telegraphy pioneer, business proprietor and senior public servant. He is perhaps best known for overseeing the establishment of Australia's first coastal radio network, which used a wireless telegraphy system patented by himself and was generally known as the Australian system. Born in Brisbane, Queensland, he migrated with his family to London in 1903. His studies focussed from an early age on wireless telegraphy, and he soon found employment in that rapidly developing industry. After a decade of wireless experience, he was recruited by then Prime Minister Fisher as the "Commonwealth Wireless Telegraphy Expert". Balsillie helped to develop the Australian Wireless System free of royalty, jump-starting the nation's radio communications network. The coastal radio network was completed in time to play a significant part in Australia's defence of its borders in World War I.
Frank Hatherley, also known as 'Bobby Bluegum' was an Australian radio personality, announcer and community singing leader. He was the first children's session presenter at the Australian Broadcasting Corporation.
References
- ↑ "1910–1911 – The Junior Wireless Club Limited becomes the Radio Club of America". Radio Club of America. Archived from the original on 2019-10-22. Retrieved 2019-10-22.
- ↑ Meyer, Roger. "The Role of Coastal Radio Stations in the Early Days of Communications With Aircraft" . Retrieved 2019-10-22.
- ↑ "David Young Given Award for Achievement in Radio". Los Angeles Daily News. June 11, 1949. p. 10-B. Retrieved May 22, 2024.