thermionic valve

A thermionic valve is an electronic device that controls the flow of electrons in a vacuum or gas-filled tube using heated cathodes and electrodes to amplify, rectify, or switch electrical signals.

Observed surface forms (1)

• thermionic diode ×1

Instances (2)

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