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Between 1900 and 1920 the first technology for transmitting sound by radio was developed, AM (amplitude modulation), and AM broadcasting sprang up around 1920. On Christmas Eve 1906, Reginald Fessenden is said to have broadcast the first radio program, consisting of some violin playing and passages from the Bible.
In the 1920s, the Westinghouse company bought Lee de Forest's and Edwin Armstrong's patent. During the mid-1920s, Amplifying vacuum tubes revolutionized radio receivers and transmitters. Westinghouse engineers developed a more modern vacuum tube.
Y. Your Hit Parade. Categories: 1920s in the United States. American radio programs by decade. 20th-century American radio programs. 1920s radio programs. Hidden category: Category series navigation decade and century.
1920 in radio details the internationally significant events in radio broadcasting for the year 1920. Events. January. The first informal and spasmodic broadcasts in the United Kingdom are made by the Marconi Company from Chelmsford in England. These broadcasts include both speech and music. [1]
Timeline of radio - Wikipedia. Contents. hide. (Top) Origins and developments. Spark-gap telegraphy. Audio broadcasting (1915 to 1950s) Later 20th-century developments. Telex on radio. See also. References. Cited sources. External links. Timeline of radio.
Invention of radio. A French ship-to-shore radio station in 1904. The invention of radio communication was preceded by many decades of establishing theoretical underpinnings, discovery and experimental investigation of radio waves, and engineering and technical developments related to their transmission and detection.
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The Radio Historian. It’s been a full century since the first broadcasting signals from makeshift radio transmitters crackled through the headphones of early radio experimenters. Without a doubt, broadcasting in 1920 bore no resemblance to the polished, widespread communication medium we know so well today -- it was chiefly a crude outgrowth ...
