The Thermionic Vacuum Tube-Physics and Electronics

Front Cover
Watchmaker Publishing, 2003 - Technology & Engineering - 412 pages
This work contains the principles of operation of The Thermionic Vacuum Tube, and coordinates the phenomena encountered in a study of this field.
 

Contents

SECTION
1
Relation between Space Charge and Potential Distribution
9
CHAPTER II
16
SECTION PAGE 22 Control of Space Current by Means of an Auxiliary or Third Elec trode 122475
22
CHAPTER III
23
Elements of Thermionics
30
Photoelectric Effect
38
CHAPTER IV
50
Low Frequencies w10
209
High Frequencies
212
Practical Measurement of Amplification
215
Amplification as a Function of Operating Parameters
224
Tube Constants as Functions of the Structural Parameters
226
Calculation of Amplification Constant
227
Calculation of Plate Resistance
234
Types of Thermionic Amplifiers
236

Currentvoltage Relation of Infinite Parallel Plates
54
Quantitative Relation for Concentric Cylinders
59
Influence of Initial Velocities
61
Effect of Voltage Drop in the Filament
64
Influence of Limitation of Current by Thermionic Emission
70
Effect of Curvature of the Characteristic
73
Energy Dissipation at the Anode
75
Efficiency of the Cathode
76
Life of a Vacuum Tube
84
CHAPTER V
86
Mean Free Path of Electrons in Gases
88
Ionization at Low Pressures
90
Effects of Ionization by Collision
91
Influence of Ionization on the Infrasaturation Part of the Charac teristic
93
Effect of Gas on the Electron Emission Surface Effect
98
Influence of Occluded Gases
102
Ionization at High Pressures
106
Difference between Gasfree Discharge and Arc Discharge
107
CHAPTER VI
109
The Fleming Valve
111
Valve Detector with Auxiliary Anode Battery
112
Thermionic Valve as High Power Rectifier
115
Optimum Voltage for Rectification
117
Types of Thermionic Valves
120
Rectification Efficiency
123
Production of Constant Source of High Voltage with the Thermionic Valve
132
The Thermionic Valve as a Voltage Regulator
142
THE THERMIONIC AMPLIFIER
145
SECTION PAGE 52 Action of the Auxiliary Electrode
146
Currentvoltage Characteristics of the Thermionic Amplifier
150
Amplification Constant
160
Mutual Conductance
165
Shape of Output Wave in Circuit of Low External Impedance
166
Characteristic of Circuit Containing Tube and Resistance in Series
169
Static and Dynamic Characteristics
170
Conditions for Distortionless Amplification
178
Amplification Equations of the Thermionic Amplifier
180
Voltage Amplification
181
Power Amplification
185
Experimental Verification of Amplification Equations
189
Methods of Measuring the Amplification Constant
193
Measurement of the Plate Resistance
195
Direct Measurement of the Mutual Conductance
199
Circuit for Measuring Amplification Constant Plate Resistance and Mutual Conductance
203
Influence of the Electrode Capacities
205
Amplification Circuits
249
CHAPTER VIII
266
Method of Procedure for the Solution of the Oscillation Equations
267
Conditions for Oscillation in a Twoelement Device
269
Conditions for Oscillation for Threeelectrode Tube
271
Relation between Mutual Conductance of Tube and that of Plate Circuit
279
Phase Relations
280
Colpitts and Hartley Circuits
282
Tuned Gridcircuit Oscillator
284
Effect of Intraelectrode CapacitiesParasitic Circuits
285
Regeneration
287
Complex and Coupled CircuitsMeissner Circuit
290
SECTION PAGE 90 Circuits Comprising ac and dc Branches
292
Effect of Grid Current
295
Output Power
296
Efficiency
298
Method of Adjusting Coupling between Output and Input
306
Influence of the Operating Parameters on the Behavior of the Oscillator
307
Range of Frequency Obtainable with the Vacuum Tube Oscillator Circuits for Extreme Frequencies
312
CHAPTER IX
315
Modulation
318
Modulation Systems
322
Detection
325
Root Mean Square Values of Detecting and Modulated Currents
328
Detection with Blocking Condenser in Grid Circuit
332
Method of Measuring the Detecting Current
335
Measurement of the Detection Coefficient
339
Detecting Efficiency
344
Comparison of Detectors
346
Audibility Method of Measuring the Detecting Current
349
Heterodyne Reception with the Audion
353
Zero Beat or Homodyne Method of Receiving Modulated Waves
358
The Feed Back Receiving Circuit
360
Radio Transmitting and Receiving Systems
361
Multiplex Telegraphy and Telephony
364
CHAPTER X
367
Hightension Voltmeter
369
The Audion Voltage and Current Regulator
371
Power Limiting Devices
373
The Ionization Manometer
375
Heterodyne Method of Generating Currents of Very Low Frequency with the Vacuum Tube
377
The Thermionic Valve as a Hightension Switch
378
Tubes Containing More than One Grid
380
Index
385
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