Definition

1. Noun:
   • An electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope: An "electron tube" is a sealed container, typically made of glass or metal, from which most of the air has been removed to create a vacuum. Inside, electrodes control the flow of electrons to perform functions such as amplification, rectification, or signal generation.

Usage Examples

• Noun:
  • The old radio uses an electron tube to amplify the signal.
  • Before the invention of the transistor, the electron tube was a fundamental component in electronics.

Advanced Usage

• "Vacuum tube": This is a common synonym for "electron tube," emphasizing the vacuum inside the device.
  • The terms "electron tube" and "vacuum tube" are often used interchangeably.
• Historical Context: The electron tube was a critical technology in early computers, radios, and televisions.
  • The ENIAC computer, built in the 1940s, relied on thousands of electron tubes.

Variants and Related Words

• Vacuum tube (n): A synonym for electron tube.
• Thermionic valve (n): Another term, primarily used in British English, referring to the same device.
• Diode/Triode/Tetrode/Pentode (n): Specific types of electron tubes, classified by the number of electrodes (two, three, four, or five) they contain.

Synonyms

• Vacuum tube: A direct synonym.
• Thermionic valve: A synonym emphasizing the use of thermionic emission (heating an electrode to release electrons).

Related Phrases

• "Tube amplifier": An audio amplifier that uses electron tubes, often prized for its sound quality.
  • Many guitarists prefer the warm sound of a tube amplifier.
• "Tube radio": A radio receiver built using electron tube technology.
  • He collects and restores antique tube radios.

Noun

1. electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope