LESSON 5
RADIO RECEIVER OPERATION AND CIRCUIT ANALYSIS
SCOPE ....................................Power
supplies,
circuit
analysis
of
electron-tube
and
transistorized
receivers,
tuning
indicators,
CW
detection; troubleshooting AM receivers.
CREDIT HOURS .............................2
TEXT ASSIGNMENT ..........................TM 11-665, para 150, 152-153, 156-160;
Attached Memorandum, para 5-1 through 5-4
MATERIALS REQUIRED .......................None
SUGGESTIONS ..............................Read assignment in TM 11-665 before you
read the attached memorandum.
LESSON OBJECTIVES
When you have completed this lesson, you will be able to:
1. Identify the various types of power supplies used in radio receivers.
2. Explain the operation of the various circuits in a radio receiver.
3. Use meters as tuning indicators in communication receivers.
4. Explain how CW detection is accomplished.
5. Troubleshoot a radio receiver using an orderly procedure.
DNI CORRECTIONS TO TM 11-665
Page 244, para 152e, last sentence.
Delete "R20" and substitute C20.
ATTACHED MEMORANDUM
5-1.
TRANSISTORIZED AM RADIO RECEIVERS
Transistorized radio receivers for AM radio broadcast are so practical and
inexpensive that almost everyone owns one for his personal use. For this reason a
description of the receivers' size and weight is hardly necessary. The schematic
diagram of one type of transistorized broadcast radio receiver is shown in figure
5-1.
When communication-type transistorized radio receivers become generally
available, they probably will use similar schematics.
Figure 5-1.
Transistorized radio receiver, schematic diagram.
(Located at the back of the lesson booklet.)
322 L5
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