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Julio
Julio developed radio in spain around 1902. On March 22, 1902 Cervera founded the Spanish Wireless Telegraph and Telephone Corporation and brought to his corporation the patents he had obtained in Spain, Belgium, Germany and England. -
Telefunken
Telefunken society for wireless telefon" of Siemens & Halske and the Allgemeine Elektrizitäts-Gesellschaft as joint undertakings for radio engineering in Berlin. -
Reginald
Reginald was a canadian inventor who performed pioneering experiments in radio including the use of continuous waves and the early and possibly the first radio transmissions of voice and music. -
lee de forest
In 1906 Lee invented the Audion the first triode vacuum tube and the first electrical device which could amplify a weak electrical signal and make it stronger. The Audion made possible for radio broadcasting, television, and long distance telephone service, among many other applications. -
Charles David Herrold
an electronics instructor in San Jose, California constructed a broadcasting station. It used spark gap technology, but modulated the carrier frequency with the human voice, and later music. The station "San Jose Calling" continued to eventually become today's KCBS in San Francisco. -
Ferdinand Braun
In 1909, Marconi and Karl Ferdinand Braun were awarded the Nobel Prize in Physics for "contributions to the development of wireless telegraphy". -
Marconi
Marconi was the first italian inventor who made the first radio signal. known for his pioneering work on long distance radio transmission. His development of Marconis law and a radio telegraph system. -
Harold J. Power
On March 8, 1916, Harold Power with his radio company American Radio and Research Company broadcast the first continuous broadcast in the world from Tufts University under the call sign 1XE. -
Edwin Armstrong
Edwin was the first inventor in making the FM transmitter. Edwin has been called the most prolific and influential inventor in radio history. He invented the regenerative circuit while he was an undergraduate. -
First vacuum tubes
During the mid 1920s amplifying vacuum tubes revolutionized radio receivers and transmitters. John Ambrose Fleming developed an earlier tube known as an "oscillation valve". -
crystals set
The most common type of receiver before vacuum tubes was the crystal set, although some early radios used some type of amplification through electric current or battery. Inventions of the triode amplifier, motor-generator, and detector enabled audio radio. -
FM and television start
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. After World War II, the FM radio broadcast was introduced in Germany. -
Amos 'n" Andy
Amos 'n' Andy is a sitcom set in Manhattan's historic black community of Harlem. The show was very popular in the United States from the 1920s through the 1950s on both radio and television -
Gunsmoke
gunsmoke was an old tv and radio western drama series. The stories take place in and around Dodge City, Kansas, during the settlement of the American West. The central character is lawman Marshal Matt Dillon, played by William Conrad on radio and James Arness on television.
