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discover of radio waves
Heinrich Hertz proved the existence of radio waves in the late 1880s. He used a spark gap attached to an induction coil and a separate spark gap on a receiving antenna. When waves created by the sparks of the coil transmitter were picked up by the receiving antenna, sparks would jump its gap as well. -
Musical Theatre Radio
MTR -Musical Theatre Radio is dedcated to plaiing stage shows from the musical theatre repertoire raging from the 1890's to now. -
musical
The Isle of Champagne (R), 5/29/1893, Miner's Fifth Avenue, 48 -
radio inventor
Guillermo Giovanni Maria Marconi, 1st Marquis of Marconi FRSA was an Italian inventor and electrical engineer, known for his pioneering work on long-distance radio transmission, development of Marconi's law, and a radio telegraph system. -
radio communication
By 1899 he flashed the first wireless signal across the English Channel and two years later received the letter "S", telegraphed from England to Newfoundland. -
radio act
Radio Act of 1912
In 1912, the sinking of the Titanic due to delayed emergency signals -
first commercial AM Audion vacuum tube radio transmitter
The first commrcial AM Audion vacuum tube radio transmitter, built in 1914 by Lee De Forest -
first radio in public
The early 1920s to distribute ... American Marconi and future president of the Radio Corporation of America (RCA), to author his first "Radio Music Box" -
first radio station
station KDKA
On November 2, 1920, station KDKA made the nation's first commercial broadcast (a term coined by Conrad himself). -
Radio navigation
Radio navigation plays an important role during war time, especially in World War II. -
The Radio Act of 1927
The Radio Act of 1927
The Radio Act of 1927 gave the Federal Radio Commission the power to grant and deny licenses -
money by selling radios
The early history of radio is the history of technology that produces and uses radio instruments ... Meanwhile, record sales fell from $75 million in 1929 to $26 million in 1938 (with a low point of $5 million in 1933), though the economics of the ... The store was broadcasting music from its store on the radio station WOR. -
FM radio
In 1933, FM radio was patented by inventor Edwin H. Armstrong.[78] FM uses frequency modulation of the radio wave to reduce static and interference from electrical equipment and the atmosphere. -
first commercially produced transistor radio.
The Regency TR-1, which used Texas Instruments' NPN transistors, was the world's first commercially produced transistor radio. -
first commercial all-digital radio transmitter
2015 The first commercial all-digital radio transmitter, called Pizzicato, was introduced
