vacuum tube

A vacuum tube is an electronic device that controls the flow of electric current in a sealed, evacuated glass or metal enclosure using electrodes such as cathodes and anodes.

Observed surface forms (2)

• electronic component ×2
• triode vacuum tube ×1

Instances (3)

• audion vacuum tube
  surface form: Audion vacuum tube
• Fleming valve
• Audion via concept surface "triode vacuum tube"