Lee de Forest was an American inventor who is credited with inventing the first practical radio. His invention revolutionized communication and ushered in the era of modern radio broadcasting. De Forest's invention of the triode vacuum tube, which allowed for the amplification of signals, was
Lee de Forest was an American inventor, electrical engineer, and early pioneer in electronics of fundamental importance. He invented the first practical electronic amplifier, the three-element "Audion" triode vacuum tube in 1908. This helped start the Electronic Age, and enabled the development of the electronic oscillator. These made radio broadcasting and long-distance telephone lines possible, and led to the development of talking motion pictures, among countless other applications.