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Contents
INTRODUCTION	6
CHAPTER ONE FUNDAMENTAL IDEAS
The Classes of Radio Troubles--The Interoperation of the Circuit--The Continuity of the Circuit	7
CHAPTER TWO TEST EQUIPMENT
Tools and Equipment for the Amateur--What the Professional Needs--Laboratory Apparatus for the Serviceman	9
CHAPTER THREE A HOMEMADE RADIO TEST SET
Ohm's law--Fundamental Voltmeters and Ammeters--Ammeter Shunts and Voltage Multipliers--How to Make a Test Set	13
CHAPTER FOUR HOW TO USE TEST EQUIPMENT
Continuity Tests--The Voltmeter and Ammeter--A Portable Oscillator--The RAdio Test Set--Commercial Test Equipment	17
CHAPTER FIVE SERVICE PRELIMINARIES
Ascertaining the History of the Receiver--Keeping a Record--The Questionaire--The Jewell Analysys Chart	20
CHAPTER SIX NO SIGNALS
The General Causes of No Signals--Localizing the Trouble--The Power Supply--The Antenna System--The Loud Speaker	22
CHAPTER SEVEN WEAK SIGNALS
Partial Failures--The R.F. System--Lack of Sensitivity--The Antenna-The Power Supply--Audio Amplifiers--The Speaker Circuit	24
CHAPTER EIGHT DISTORTION
Different Kinds of Distortion--The “C” Bias--Peak Distortion--Frequency Distortion--Distortion in the R.F. System--Distortion in the A.F. Amplifier--Rattling	27
CHAPTER NINE NOISY RECEPTION
The Localization of Noise--Varieties of Noise--Noises Outside of the Receiver--Disturbances Within Set--Noise Accompanied with Change in Signal Strength	30
CHAPTER TEN MISCELLANEOUS TROUBLES
Broad Tuning--Short Tube Life--Short Battery Life--Signals Too Loud--The Pentode	33
CHAPTER ELEVEN SPECIAL RECEIVERS
The D.C. Set--Special Battery Problems--The Airplane Receiver--Automobile Radio--Motorboat Radio	36
CHAPTER TWELVE SIMPLE TESTS FOR THE FAN
What do Do Before You Call the Serviceman--Checking the Power Circuit--Weak Reception--Checking the Tubes	38
APPENDIX 41 A Service Laboratory Instrument 59 Receiver Circuits 42 Designing Voltage Dividers 61 Receiver Characteristics 47 Remote Control Systems 64 Loud Speaker Characteristics 49 A New Tool for the Serviceman 66 Symbols 50 Speech Amplifiers 69 Laboratory Information Sheets 51 The Illimination of Hum 72 A Beat Frequency Oscillator 54 A Universal Meter 79 Hints for Servicemen 56 How to Make the Loftin-White Amplifier 82 Measuring up Resistors 57 How to Install an Auto-Radio Receiver 86

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