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feb 14, 1906 - Triode Vacuum Flask

Description:

Lee de Forest
control electode added to 2 electrodes in Flemings vacuum tube
audion
first electron amplifier?

Added to timeline:

History of Computing

ByJanna Hawkins

2 Nov 2018

0

0

1382

Date:

feb 14, 1906

Now

~ 120 years ago

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