Welcome to the Vacuum Tube!
Fundamentals
What is a vacuum tube? In electronics, a vacuum tube, an electron tube, or valve, or colloquially, a tube, is a device that controls electric current flow in a high vacuum between electrodes to which an electric potential difference has been applied. From this page, you can know the complete vacuum tube definition.
Types
There are a lot of different vacuum tube types, all with their own applications, characteristics and construction, most of which fall into four general types: (1) The diode, (2) the triode, (3) the tetrode, and (4) the pentode. This page lists the different vacuum tube types .
Applications
From here we can know vacuum tube or thermionic valve technology that provid the first form of active device used within electronics and they are still used in some specialist applications.
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