Lee de Forest (THG file photo)
Lee de Forest (THG file photo)

Telecom Heroes
Lee de Forest

Lee de Forest was an American inventor, self-described “Father of Radio,” and a pioneer in the development of sound-on-film recording used for motion pictures. His most famous invention was, in 1906, an “Audion” (triode) vacuum tube, the first practical amplification device.

The invention had great potential as a telephone repeater amplifier. Previously, electromechanical note magnifiers had been used by the telephone industry, with little success.





back to Alexander Graham Bell
on to Lewis H. Latimer


Telecom Heroes
Lee de Forest


Lee de Forest (THG file photo)

Lee de Forest was an American inventor, self-described “Father of Radio,” and a pioneer in the development of sound-on-film recording used for motion pictures. His most famous invention was, in 1906, an “Audion” (triode) vacuum tube, the first practical amplification device.

The invention had great potential as a telephone repeater amplifier. Previously, electromechanical note magnifiers had been used by the telephone industry, with little success.

back to top
back to Alexander Graham Bell
on to Lewis H. Latimer