In 1907 American inventor Lee De Forest invented the three-electrode vacuum tube
In 1907 American inventor Lee De Forest invented the three-electrode vacuum tube
Vacuum tube was invented by lee de forest .
Lee De Forest invented vacuum tubes.
John Ambrose Fleming invented the vacuum tube in 1904.
First invented by a British scientist named John A. Fleming, although Edison had made some dsicoveries while working on the lightbulb. The vacuum tube was improved by Lee DeForest.
No one person invented the vacuum tube. Thomas Edison, Eugene Goldstein, Nikoli Tesla, among others were responsible.
the vacuum tube
De Forest invented the Audion tube, a vacuum tube that takes relatively weak electrical signals and amplifies them.
Although the discovery was made of the principles for the vacuum tube around 1873 it was not put into practice until the early 1900's.
in 1919..by John A.Fleming
A vacuum tube does not contain any gases. All the gases are evacuated from the tube and only vacuum is left.
In 1906 Lee De Forest, an American engineer (often called the "father of radio"), invented the three-element vacuum tube, or triode.