History of the Radio

1888: Heinrich Hertz made the first electromagnetic radio wave.
1894: Sir Oliver Lodge sent the first message using radio waves in Oxford, England. 
1899: Guglielmo Marconi sent radio waves across the English Channel.
1901: Marconi sent waves across the Atlantic from Cornwall, England to Newfoundland 
1906: Reginald Fessenden became the first person to transmit a human voice using radio waves. He sent a message from Brandt Rock, Massachusetts to ships eleven miles off the coast. 
1906: Lee De Forest invented a triode or audion. This is an electrical component that made radios smaller and more compact. This earned him the nickname "father of the radio."
1910: The first public radio broadcast was made from the Metropolitan Opera, New York City.
1920s: During the 1920s, the radio began to evolve into the television. 
1947: The first transistor was created by John Bardeen, Walter Brattain, and William Shockley. They worked for Bell Lades. The transitor made it possible to amplufy radio signals with more compact circuits. 
1954: The world's first commercially produced transistor radios were launched. In the first year, 1500 were sold. By the end of 1955, over 100,000 were sold. This radio was called the Regency TR-1.