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Radio Review/Radio Listeners Guide (1925–1929), Broadcasting Yearbook (1935–2010), World Radio TV Handbook (1947–) Berg, Jerome S. The early shortwave stations: a broadcasting history through 1945 (2013) radioheritage.net; worldradiomap.com (Europe, Americas, Asia, Oceania) Europe: Broadcasting abroad (1934); The media in Europe at Google ...
1920s: Radio was first used to transmit pictures visible as television. 1926: Official Egyptian decree to regulate radio transmission stations and radio receivers. [40] Early 1930s: Single sideband (SSB) and frequency modulation (FM) were invented by amateur radio operators. By 1940, they were established commercial modes.
Braun invented the phased array antenna, which led to the development of radar, smart antennas, and MIMO, in 1905 [30] and shared the 1909 Nobel Prize in Physics with Marconi "for their contributions to the development of wireless telegraphy". [31] The first civilian radio broadcast in Germany was a Christmas concert on December 22, 1920. [32]
The first shortwave station in Europe. 25 June 1926 (test transmissions began), and the first shortwave station in the world with its own dedicated programming rather than being a simulcast of an AM/MW or LW station such as KDKA. Regular broadcast from 30 May 1927 to May 1940 when the station went dark due to the German occupation of Holland ...
In Europe, services similar to a wirephoto were called a Belino. The Bartlane system, invented by Harry G. Bartholomew and Maynard D. McFarlane, was a technique invented in 1920 to transmit digitized newspaper images over submarine cable lines between London and New York. [3] and was first used to transmit a picture across the Atlantic in 1921. [4]
On February 17, 1919, station 9XM at the University of Wisconsin in Madison broadcast human speech to the public at large. 9XM was first experimentally licensed in 1914, began regular Morse code transmissions in 1916, and its first music broadcast in 1917. Regularly scheduled broadcasts of voice and music began in January 1921.
However, the company made a key advance in early 1924 when it began selling the first superheterodyne receivers, whose high level of performance increased the brand's reputation and popularity. RCA was the exclusive manufacturer of superheterodyne radio sets until 1930.
Popov presented his radio receiver to the Russian Physical and Chemical Society on 7 May 1895 — the day has been celebrated in the Russian Federation as "Radio Day" promoted in eastern European countries as the inventor of radio. [89] [90] [91] The paper on his findings was published the same year (15 December 1895).