The simplest answer to that question is: Vacuum tubes were originally used to
perform every function now handled by transistors.
The transistor was a big improvement over the vacuum tube because in order
to perform those functions, a vacuum tube needs two power supplies, including
one at a comparitively high voltage, it occupies a comparitively ridiculous amount
of space, and radiates a comparitively ridiculous amount of heat.
When vacuum tubes were still the only way to go, there were no portable radios
smaller than a Chicago phone-book, and most of their weight was made up of
several heavy batteries.
A cathode ray tube (CRT) television set uses a sealed vacuum chamber to display images. The chamber is filled with phosphor-coated glass screen where electrons generated by the cathode ray tube strike to create the images we see on the screen.
The vacuum tube was invented by Thomas Edison in the late 19th century. However, it was not until Lee de Forest's modification in 1906 that the vacuum tube became an essential component in early electronics.
The transistor replaced the vacuum tube as the primary component in electronic devices, offering smaller size, lower power consumption, and higher reliability. This transition marked the beginning of the semiconductor era in electronics.
The vacuum tube was invented in 1904 by John Ambrose Fleming, an English engineer.
A closed vessel having electrodes at either end and containing agas at low pressure. When a sufficient voltage is applied to theelectrodes, an electric current flows through the gas. Dischargetubes can be used to prevent current flow below a certainvoltage; they can also function as lamps by the use of ionizinggas, which glows when current flows through the tube.
when the vacuum sucks up things it goes through the tube and into the bag ...Unless you are talking about electronics, then a vacuum tube is used to form an amplifying circuit. Some tubes can emit cathode rays onto a screen (Cathode Ray Tube = CRT) to display a picture and some can function as diodes to regulate current flow.
First.
amplifierrectifiermodulatordemodulatorswitchindicatordisplaysensorDRAMrelay driverlogic gateetc.
The Plumbicon (trademark of Phillips)is an imaging tube, think of it as the active part of a camera.
the vacuum tube
Vacuum tubes are neither useful nor advantageous in modern computers. These were replaced decades ago by the integrated circuit.
A tube light uses a condenser which is the old term for a capacitor. It functions as a small battery in a circuit.
No vacuum tubes on the Dakota. It uses electric servos.
Computer tubes, also known as vacuum tube computers are programmable computers that uses vacuum tube logic circuitry. They were used to solve computational problems much like modern day computers.
The importance of the Transistor was that it could amplify an electrical signal. It was thus an analog of the vacuum tube devices, and could take advantage of the circuit history and applications that had built up over the preceding 50 years.
A vacuum tube is simply a tube with no oxygen nor carbon dioxide in it (aka no air).
Millman's theorem