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VACUUM TUBES, VALVE AMPS, MANUAL
FROM THE 1960S
165 PAGES ON VACUUM TUBES PDF FORMAT
CONTENTS
Chapter 1. CATASTROPHIC FAILURES 7
Glass Failures—Heater Failures—Arcing—Fixed versus
Bias
Chapter 2. DEGENERATIVE FAILURES 22
Gas—Getters—Spurious Emissions—Interelectrode Leak-
age—Interface Resistance—Cathode Depletion
Chapter 3. SUBJECTIVE FAILURES 37
Hum—Microphonics—Noise
Chapter 4. CHARACTERISTIC VARIABLES . . . 53
Predicting Variables — How Standards Are Set — The
Bogey Tube — The Limit Tube — Correlating Measure-
ments—Typical Correlation—Characteristic Spreads—
Quality Control—Sampling—Design Tolerances
Chapter 5. SELECTED AND PREMIUM TUBES . . 69
How Tubes Are Selected—Results of Tube Selection—
Premium Tubes—The Multi-Spec Tubes—Standardiza-
tion and Reliability—How Standards Are Set—Univer-
sal Tubes—The Universal Commodity—Defining Relia-
bility—Reliability and Standardization
Chapter 6. WHY SO MANY TUBE TYPES? . . . 83
Filament Voltage Sources-2-Volt and 6.3-Volt Tubes—
TV Types—Hybrid Types—Physical Changes—Minia-
tures and Subminiatures—Multipurpose Tubes—Electri-
cal Characteristics—Competition—Technological Devel-
opments
Chapter 7. PREDICTING TUBE PERFORMANCE 96
Life Expectancy By Structure—Life Expectancy By Ap-
plication — Tests for Initial Performance — Predicting
Life
Chapter 8. TUBE TESTERS 111
Early Tube Testers—Classification of Tube Testers—
Shorts and Gas Tests—Maintenance Practices
Chapter 9. SPECIAL-PURPOSE TUBES 128
Filamentary Tubes—Low-Voltage Tubes—Phototubes--
Voltage-Regulator Tubes—Thyratrons
Chapter 10. METHODS FOR LENGTHENING TUBE LIFE 145
Measuring Bulb Temperature — Dissipation Control —
Voltage and Current Regulation—Low-Voltage Opera-
tion—Mechanical—Maintenance
Glossary 154
Index 158
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