Search results
Results from the WOW.Com Content Network
While working for the United States Weather Bureau on Cobb Island, Maryland, Fessenden researched using this setup for audio transmissions via radio. By fall of 1900, he successfully transmitted speech over a distance of about 1.6 kilometers (one mile), [39] which appears to have been the first successful audio transmission using radio signals.
The station was ultimately relicensed as WWJ, and while observing its 25th anniversary in 1945 the News claimed for it the titles of "the world's first station" and where "commercial radio broadcasting began". [85] After the war the American Radio and Research Company (AMRAD) in Medford Hillside, Massachusetts reactivated 1XE. Although there is ...
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.
In 1900, construction began on a large radio transmitting alternator. Fessenden, experimenting with a high-frequency spark transmitter, successfully transmitted speech on 23 December 1900, over a distance of about 1.6 kilometres (0.99 mi), the first audio radio transmission.
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 ...
Until the early 1930s, it was generally accepted that Lee de Forest, who conducted a series of test broadcasts beginning in 1907, and who was widely quoted promoting the potential of organized radio broadcasting, was the first person to transmit music and entertainment by radio. De Forest's first entertainment broadcast occurred in February ...
The first radio transmitters could not transmit audio (sound) like modern AM and FM transmitters, and instead transmitted information by radiotelegraphy; the transmitter was turned on and off rapidly using a switch called a telegraph key, creating different length pulses of radio waves ("dots" and "dashes") which spelled out text messages in Morse code.
13 August – The United States Congress passes the Radio Act of 1912, "An Act to regulate radio communication", requiring that all radio stations be licensed. [ 1 ] 9YV, an experimental station operated by Kansas State University in Manhattan, Kansas , becomes the first radio station in the United States to offer a regularly-scheduled daily ...