In late 1906, Lee de Forest had invented the three-element ( triode ) " grid Audion " vacuum-tube.
22.
The Audion ( triode ) vacuum tube invented by Lee De Forest in 1906 was the first practical single sideband ( SSB ).
23.
The "'control grid "'is an electrode used in amplifying amplifying vacuum tube, the Audion ( triode ).
24.
Apple tried to meet with Cabel and Steven to hire them to create the original version of iTunes based on their work on Audion.
25.
The "'autodyne "'circuit was an improvement to radio signal amplification using the De Forest Audion vacuum tube amplifier.
26.
Another important design in the Audio Tron Tube is the use of a cylindrical plate instead of the typical flat plate in the audion.
27.
This flies directly in the face of his original patent specification, which specifically states that gas is essential to the operation of the Audion.
28.
He had been working on the first triode vacuum tube, the audion, but it was not sufficiently developed to replace the spade detector.
29.
De Forest is one of the fathers of the " electronic age ", as the Audion helped to usher in the widespread use of electronics.
30.
Following the invention of the audion tube in 1906, electric microphones gradually replaced the purely acoustical recording methods of earlier dictaphones by the late 1930s.
