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The outer envelope is usually glass. The inner parts are various metals and plastics.

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βˆ™ 9y ago
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βˆ™ 6mo ago

Vacuum tubes are typically made of glass or metal. The glass or metal envelope contains electrodes and is evacuated to create a vacuum inside. The electrodes are made of elements like tungsten or molybdenum.

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Q: What are vacuum tubes made of?
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What is vacuum tubes define?

Vacuum tubes are electronic devices that control the flow of electrons in a vacuum. They were widely used in early computer and radio technology before being replaced by transistors. Vacuum tubes can amplify signals and are known for their warm, vintage sound in audio equipment.


What household objects have a vacuum in?

Vacuum cleaners, food sealers, and central vacuum systems are household objects that contain a vacuum. Vacuum cleaners use suction to clean surfaces, food sealers remove air from packaging to preserve food, and central vacuum systems create suction throughout a home for cleaning.


Vaccum tubes were replaced by what?

Vacuum tubes were largely replaced by transistors. Transistors are smaller, more reliable, and generate less heat compared to vacuum tubes. This transition led to the development of smaller and more efficient electronic devices.


Who invented the vacuum tubes and when?

Vacuum tubes were invented by Thomas Edison in the 1880s. However, it was later improved by Lee De Forest in the early 20th century, who added a grid electrode and introduced the concept of the triode vacuum tube.


What branch of electricity deals with the behavior and motion of electrons in a vacuum or special materials?

Vacuum electronics is the branch of electricity that deals with the behavior and motion of electrons in a vacuum or special materials, typically focusing on applications like vacuum tubes, cathode ray tubes, and traveling wave tubes. The study of electron behavior in these conditions is important for various high-power and high-frequency electronic applications.

Related questions

Where was vacuum tube was made?

who made the vacuum tubes


How many vacuum tubes are in the Univac I computer?

It used 5200 vacuum tubes.


Do all vacuum tubes light up?

No, there are some cold cathode vacuum tubes. These do not light.


How many vocum tubes were in the eniac?

The ENIAC has 17,468 vacuum tubes. These tubes were the first technology that made computers function. Modern computers do not use this technology.


What characteristics made the transistor better than the vacuum tube?

There were obvious differences between the trasisitor and the vacum tube. The transistor was faster, more reliable, smaller, and much cheaper to build than a vacuum tube. One transmisor was the equivalent 40 vacuum tubes. They also didn't produce heat compare it to a vacuum tubes. Conduct electricity faster and better than vacuum tubes.


Where is a good place near Seattle where you can buy old vacuum tubes?

This would depend on the type of vacuum tubes needed. Any car part store will carry vacuum tubes for a car, general stores carry vacuum tubes for household vacuums, and AC part stores will carry vacuum tubes for the AC/Heating system of a house.?æ


Did Alan Turing made the vacuum tubes computers?

No, he had to use mechanical gears, etc. because they were the only device technology available in his time. Electric relays were first developed about 15 years after he designed his computer, while vacuum tubes were first developed about 90 years after he designed his computer.


How many vacuum tubes in first generation computer?

ENIAC was the first digital general purpose computer, built in 1946, and with 17,468 vacuum tubes. The Illiac I, the first computer built and owned by a US educational institution, had 2800 vacuum tubes. The IBM 604 had about 2000 vacuum tubes.


When were vacuum tubes invented?

Although the discovery was made of the principles for the vacuum tube around 1873 it was not put into practice until the early 1900's.


What technology replaced vacuum tubes in the second generation?

Vacuum tubes were first replaced by transistors, and later by integrated circuits.


Why modern devices use integrated circuit instead of vacuum tubes?

Modern devices use integrated circuits instead of vacuum tubes because integrated circuits occupy less space than vacuum tubes, are more efficient, consumes less energy and are more reliable than vacuum tubes.


Vacuum tubes generation?

first