-
Heinrich Hertz proved that electricity can be transmitted in electromagnetic waves. He showed tests in sending and receiving these waves through the late 1880s. He proved it by James Clerk Maxwell's electromagnetic theory of light.
-
Guglielmo Marconi applied for patent protection of his radio equipment. He established the Wireless Telegraph and Signal Company in 1897. Many still think Tesla invented the radio .
-
At the age of twenty Marconi started to Experiments in the attic. Marconi was located Italy. His butler (Mignani), helped him build his equipment in the attic.
-
In 1906, Lee De Forest, invented the electronic amplifying vacuum. It made live broadcasting possible with his invention. It also became helpful to the telephone, radar, television, and computer systems.
-
On Christmas eve, Reginald Fessenden(Canadian Inventor ) used the alternator-transmitter to sent out a small program from Brant Rock. it included a record player of Ombra mai fu by George Frideric Handel, followed by Fessenden himself playing Holy night on the violin. He also read the biblical account of the birth of Christ.
-
On the day of the sink. The titanic had two radio officers. the radio technology saved hundreds of lives. And the Titanic's sink also helped reform the radio.
-
KDKA was the first radio station in the united states. It was located in western Pennsylvania, and the slogan was the voice of Pittsburgh. Four men ran the first broadcast( William Thomas, John Frazier, R.S. McClelland, Leo Rosenberg.
-
On November 2nd, the KDKA (radio station) were the first to commercially broadcast. They thought that more people would listen to the radio as a faster way of getting results of the presidential election.The radio beat the newspaper.
-
Donald Hings is credited for the invention of the walkie-talkie . It was constructed for his manager CM&S. Earlier called the Packset , but then changed to the Walkie-talkie
-
Before the portable radio was produced, radios used vacuum tubes. Although portable vacuum tube were made , they were too big and heavy caused by the massive batteries. It became the most favored electronic communication machine in history.
-
In Febrary 1894, James Russel invented the first working cd device to go in radios. It was made from polycarbonate. It can store digital data.
-
Radios are also helpful for airplanes. But they were not used for live broadcasting.It helped aircraft crews connect with other aircraft and people on the ground to relay information.
