What is Vacuum Tube ?

The negative electrostatic field created by the grid in the vicinity

De Forest's original device was made with conventional vacuum technology

Finnish inventor Eric Tigerstedt significantly improved on the original triode design in 1914

The vacuum tube is a glass tube that has its gas removed, creating a vacuum

Vacuum tubes contain electrodes for controlling electron flow and were used in early computers as a switch or an amplifier.

Vacuum tubes were also used in radios, televisions, radar equipment, and telephone systems during the first half of the 1900s.

In the 1950s, the transistor started to replace the vacuum tube.

Vacuum tubes were larger in size and did not fit well for smaller computing devices, thus leading to their reduced usage.

vacuum tubes are no longer used in electronic equipment.

vacuum refers to a space where charged particles such as electrons, protons, neutrons and all other matter are absent.

In other words, vacuum is nothing but the empty space.

Vacuum tube is an electronic device that controls the flow of electrons in a vacuum. It is also called as electron tube or valve.

John Ambrose Fleming developed the first vacuum tube in 1904.

In 1906, American electrical engineer Lee De Forest invented Audion vacuum tube.

invention of vacuum tubes has produced a new branch of engineering called electronics

Vacuum tubes are huge and occupy large amount of space

Vacuum tubes are made from the materials such as glass and ceramics.

Vacuum tubes are mostly depends on the thermionic emission process to emit the free electrons.

Vacuum tube that emits the free electrons by the application of heat is called thermionic valve or thermionic tube

Vacuum tubes are replaced easily.

Vacuum tubes can works at high temperature without any damage.

Vacuum tubes produce superior sound quality.

Vacuum tubes are huge compared to the semiconductor devices such as diodes, transistors, and integrated circuits.

High voltages are required to operate the vacuum tubes.

Vacuum tubes occupy more space than the transistors.