1 ene 1906 año - Audion triode vacuum tube Invented
Descripción:
an electronic valve that could amplify weak electrical signals. By 1915, it was in use in long-distance telephone circuits that made conversations between New York and San Francisco practical.
Añadido al timeline:
fecha:
1 ene 1906 año
Ahora mismo
~ 119 years ago
Fotos:
![]()