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14 feb 1906 anni - Triode Vacuum Flask

Descrizione:

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

Aggiunto al nastro di tempo:

History of Computing

ByJanna Hawkins

2 nov 2018

0

0

1228

Data:

14 feb 1906 anni

Adesso

~ 119 years ago

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