Definition

Noun: - An electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope: A thermionic tube is a component that controls electric current flow in a high vacuum between electrodes to which an electric potential difference has been applied. It operates based on the principle of thermionic emission, where heated electrodes emit electrons.

Usage

• The term is used to describe a specific class of vintage or specialized electronic components.
• It is often found in historical, technical, or engineering contexts discussing electronics prior to the widespread adoption of transistors.

Examples

• Noun:
  • The old radio was repaired by replacing the faulty thermionic tube.
  • The amplifier's distinctive sound is due to its use of thermionic tubes rather than solid-state circuits.

Advanced Usage

• "Thermionic tube amplifier": An amplifier that uses thermionic tubes to increase the power of a signal.
  • Audiophiles often prefer the warm sound of a thermionic tube amplifier.

Variants and Related Words

• Thermionic valve (n): A synonym, more commonly used in British English.
  • The circuit diagram specified a particular type of thermionic valve.
• Vacuum tube (n): A general synonym, emphasizing the evacuated enclosure.
  • Early computers were built using thousands of vacuum tubes.
• Electron tube (n): A synonym focusing on the flow of electrons.
• Valve (n): A common short form, especially in British English.

Synonyms

• Vacuum tube
• Thermionic valve
• Electron tube
• Valve (in electronics)

Related Phrases

• Tube radio: A radio receiver that uses thermionic tubes.
• Tube rectifier: A thermionic tube used to convert alternating current to direct current.

Noun

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