lesson two
diodes
INTRODUCTION
The simplest form of vacuum tube contains two electrodes--a
cathode and a plate.
This type tube is called a diode.
Thomas
Edison discovered what may be called the earliest diode, his special
lamp. The modern diode differs little in principle of operation from
the early versions.
However, today's diodes are much improved--
higher vacuum, longer life and increased ruggedness.
Diodes are used mainly to change alternating current to a
pulsating direct current, since it permits current flow in only one
direction.
In this lesson you will study the construction,
operation, characteristics and uses of the diode.
TEXT ASSIGNMENT
TM 11-662, chapter 3, paragraphs 15 thru 29.
RESOURCE REQUIREMENTS
Signal Subcourse SS0311
LESSON OBJECTIVES
When you complete this lesson you should be able to:
1.
Explain the construction of the diode tube.
2.
Explain electrostatic fields.
3.
Explain space charge.
4.
Explain
the
relationship
between
plate-current
and
plate-
5.
Explain characteristic curves.
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