SIGNAL SUBCOURSE 322-9, AM RADIO RECEIVERS
INTRODUCTION
Everywhere you look today you see adults, teenagers, and subteens listening to
radios.
At the beach, in the family car, at home, in restaurants, or just about
anywhere else, man has at his fingertips music, comedy, drama, sports, weather, and
news.
All he has to do is turn on his radio.
The housewife can listen to her
favorite soap opera while she is doing the ironing. The Ham comes home from work
and turns on his "rig" to try to raise another Ham in Cairo, Rome, or maybe
Calcutta.
Consider the modern fireman, policeman, cab driver, member of the military, or
any number of other businesses or professions.
Radio communication has become a
part of his life.
Today's sophisticated radios have evolved from the primitive equipment used by
Marconi.
Whether a radio receiver is designed for communication or for
entertainment, there are many similarities. Many of the circuits used in broadcast
receivers are identical with those in communication receivers.
To have a thorough knowledge of radio communications, you must have some
background in AM receiver fundamentals.
This subcourse is designed to give you
that background.
This subcourse consists of five lessons and an examination as follows:
Lesson 1.
Radio Receiver Characteristics
Lesson 2.
Signal Input Circuits
Lesson 3.
IF Amplifier and Detector Circuits
Lesson 4.
Audio Circuits and Reproducers
Lesson 5.
Radio Receiver Operation and Circuit Analysis
Examination
Credit Hours: 10
The only time limitation placed on you is that you must complete this subcourse
within 1 year from the date of initial enrollment.
Texts and materials furnished:
Subcourse Booklet
TM 11-665, C-W and A-M Radio Transmitters and Receivers, September 1952
(EXTRACTED)
Reviewed and reprinted with minor revisions, March, 1979.
EDITION 9
10 CREDIT HOURS
REVIEWED 1988
322
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