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Introduction to Electron Tubes
A.
Bhatia
Overview
An electron tube is a
device used for the processing of electrical signals.
Although solid state
semiconductors have replaced the electron tubes in most applications, there are
still niche applications where electron tubes not only continue to see practical
use, but perform their respective tasks better than any solid-state device. For
example, tubes are still used in some high-power amplifiers, especially at
microwave radio frequencies and in some hi-fi audio systems. There are many die
hard hi-fi enthusiasts who are faithful to the electron tube devices because the
output power from the tubes has better audio quality, more fidelity and has less
inherent distortions. Other items that still use electron tubes are
televisions, radios, welders, test equipment, communication equipment and many
others.
In general, the solid
state devices reign in areas where compactness and low power consumption is a
factor, but will lose out to the electron tubes where fidelity is the key
factor.
This 4-hr course provides a basic understanding of
Electron Tubes, explaining the basic theory, evolution and applications.
The course is based entirely on Naval Education and Training Materials (NAVEDTRA
14178), Electricity and Electronic Training Series; Module-6 and covers Chapter
1 titled "Introduction to Electron Tubes".
The student must take a multiple-choice quiz
consisting of twenty (20) questions at the end of this course to obtain PDH
credits.
Specific Knowledge or Skill Attained
At the conclusion of this course, the reader will
be able to:
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State the principle of
thermionic emission and the Edison Effect
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Identify the schematic
representation for the various electron tubes and their elements
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Understand the theory of
operation associated with the diode, triode, tetrode, and pentode
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Understand the
construction of various tubes and describe the purpose of various tube
elements
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State the advantages and
disadvantages of the various types of electron tubes
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State the limitations of
electron tubes
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Describe amplification
in the electron tube and how amplification is obtained.
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Explain biasing and the
effect of bias in the electron tube circuit.
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Describe, through the
use of a characteristic curve, the operating parameters of the electron tube.
Course
Click on the following PDF attachment and review the document
prior to taking
a quiz for credit.
Introduction to Electron Tubes (399 KB)
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