A klystron, magnetron or travelling-wave tube will generate microwaves. So will a vircator and an inductive output tube. These are just some of the vacuum tubes used to generate microwaves. In a microwave oven, the magnetron, which is a type of cavity resonator, is the device of choice.
A vacuum tube is simply a tube with no oxygen nor carbon dioxide in it (aka no air).
Kilobytes and vacuum tubes are not in the same category. At best, a twin triode vacuum tube is a single flip-flop and can hold 1 bit of information, making a vacuum tube about 0.000122 of a kilobyte.
an electron tube containing a near-vacuum that allows the free passage of electric current.
The following stores sell a vacuum tube. Walmart, Home Hardware, Rona, Totems, and much more. Some of the stores listed might not sell a vacuum tube depending where they are located. These stores are located in Canada.
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.
Microwaves are generated in a device called a Magnetron tube. See related link I will make below.
Microwaves are generated at the atomic level, based on the frequency of the EM radiation that it emits. This is conducted through radiation that is absorbed, reflected, attenuated, or refracted.
the vacuum tube
In Great Britain its also called "Valve"
vacuum
cathode-ray tube
No, a microwave oven does not contain a cathode ray tube. A cathode ray tube (CRT) is what is in a conventional television set.The microwave oven has a magnetron in it. The magnetron is a type of cavity resonator, and it is this electronic component that generated the microwaves that heat food items.
A vacuum tube does not contain any gases. All the gases are evacuated from the tube and only vacuum is left.
A vacuum tube is simply a tube with no oxygen nor carbon dioxide in it (aka no air).
Millman's theorem
who made the vacuum tubes
The transistor replaced the vacuum tube, allowing radios to get much smaller and portable.