-
invention of the radio
Guglielmo Marconi Invent the radio in 1899. Guglielmo Marconi: an Italian inventor, proved the feasibility of radio communication. He sent and received his first radio signal in Italy in 1895. 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. -
First Radio Broadcast
Around the start of the 20th century, the Slaby-Arco wireless system was developed by Adolf Slaby and Georg von Arco. In 1900, Reginald Fessenden made a weak transmission of voice over the airwaves. In 1901, Marconi conducted the first successful transatlantic experimental radio communications. -
Harold J. Power,
The idea for what became WGI came from a young man named Harold J. Power, who became fascinated with Marconi's experiments with the wireless and (like many boys at that time) was determined to duplicate them. Born in 1893, he had already built his first receiving set when he was only 10. By the age of 12, he was running an amateur station in his Everett, Mass. home. -
Invention of Radio Broadcaster
Charles David "Doc" Herrold (November 16, 1875 – July 1, 1948) was an American inventor and pioneer radio broadcaster, who began experimenting with audio radio transmissions in 1909. Beginning in 1912 he apparently became the first person to make entertainment broadcasts on a regular schedule, from his station in San Jose, California. -
Audio broadcasting
In the early 1930s, single sideband and frequency modulation were invented by amateur radio operators. By the end of the decade, they were established commercial modes. Radio was used to transmit pictures visible as television as early as the 1920s. -
Fm radio
In 1933, FM radio was patented by inventor Edwin H. Armstrong. FM uses frequency modulation of the radio wave to reduce static and interference from electrical equipment and the atmosphere.
