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The early history of radio is the history of technology that produces and uses radio instruments that use radio waves. Within the timeline of radio, many people contributed theory and inventions in what became radio. Radio development began as "wireless telegraphy". Later radio history increasingly involves matters of broadcasting.
American Radio Archives and Museum offers one of the largest collections of radio broadcasting in the United States and in the world. [12] It has a collection of 23,000 radio and TV scripts, 10,000 photographs, 10,000 books on radio history, and 5,000 audio recordings.
The timeline of radio lists within the history of radio, the technology and events that produced instruments that use radio waves and activities that people undertook. Later, the history is dominated by programming and contents, which is closer to general history .
A weekly children's radio program. Off the air during World War II. By the time of its final broadcast it had become the world's longest-running regular weekly radio series. [16] La Hora Nacional: 87 25 July 1937 Weekly government-sponsored cultural and information broadcast required to be aired by all Mexican radio stations. CBS World News ...
However, some very early (c. 1928–1931) radio programs were on sets of 12-inch or even 10-inch (25 cm) 78 rpm discs, and some later (circa 1960–1990) syndicated radio programs were distributed on 12-inch 33 + 1 ⁄ 3 rpm microgroove vinyl discs visually indistinguishable from ordinary records except by their label information.
In 1978 his 47-year career in radio was hailed as the longest in world history. [68] Naomi ("Joan") Melwit and Norman Banks at the 3KZ microphone, in the late 1930s. The transistor radio first appeared on the market in 1954. In particular, it made portable radios even more transportable. All sets quickly became smaller, cheaper and more convenient.
Before the discovery of electromagnetic waves and the development of radio communication, there were many wireless telegraph systems proposed and tested. [4] In April 1872 William Henry Ward received U.S. patent 126,356 for a wireless telegraphy system where he theorized that convection currents in the atmosphere could carry signals like a telegraph wire. [5]
The rapid rise of radio broadcasting during the early 1920s, which provided unlimited free entertainment in the home, had a detrimental effect on the American phonograph record industry. The Victor Talking Machine Company in Camden, New Jersey , was then the world's largest manufacturer of records and phonographs , including its popular ...