vacuum-valve

A technician carefully replaces a vacuum-valve inside the radio.

Definition

1. Noun:
   • Electronic component: A "vacuum-valve" is an electronic device that controls the flow of electric current through a vacuum between electrodes. It was widely used in early radios, amplifiers, and computers.
   • Historical technology: Often referred to as a "valve" in British English, this device amplifies or switches signals by using a heated cathode to emit electrons in a vacuum.

Usage Examples

• (The electronic component inside the radio is functional.)
• (Historical reference to early electronics.)

Advanced Usage

• "Vacuum-valve rectifier": A type of vacuum-valve used to convert alternating current (AC) to direct current (DC).

  • The power supply in vintage equipment often uses a vacuum-valve rectifier. (A specific application of the component.)

• "Vacuum-valve oscillator": A vacuum-valve circuit that generates a continuous electrical signal.

  • Early radio transmitters employed a vacuum-valve oscillator to produce carrier waves. (Technical application.)

Variants and Related Words

• Vacuum tube (n): The more common American English term for the same device.

  • Vacuum tubes were replaced by transistors in the 1960s. (Synonymous term.)

• Thermionic valve (n): A more formal scientific term for a vacuum-valve that relies on thermionic emission.

  • The thermionic valve was a key invention in early electronics. (Scientific terminology.)

Synonyms

• Electron tube: A general term for a device that controls electron flow in a vacuum.
• Radio tube: A historical term often used for vacuum-valves in radio equipment.

Phrasal Verbs

(No direct phrasal verbs exist for "vacuum-valve"; the word is a compound noun.)

Related Idioms

(No common idioms include "vacuum-valve"; the term is technical.)