Triode
part · 1906 · Electric age
A tube with an amplifying grid (Lee de Forest).
Inventors: Lee de Forest, Robert von Lieben.
Principles and materials it uses
- Glass — is made of. The bulb is glass.
- Tungsten — is made of. The filament is tungsten.
- Vacuum — uses. It works in a vacuum.
Where it is used
- Amplifier — is part of. Tube amplifiers.
History: what it evolved from and what it influenced
- Diode — evolved from. De Forest added a grid.
What it is a kind of
- Vacuum tube — is a kind of. A vacuum tube.