Bruce Rozenblit "Beginner's Guide to Tube Audio Design" 

First Edition 1997 by
Bruce Rozenblit 

INTRODUCTION (ix) Equations. Ohm's Law. Connections. 

CHAPTER 1: WHAT IS A VACUUM TUBE (3) First Simplification: Electrons. Second Simplification: Fields & Electron Motion. Tube Parts. Tube as a HeatPowered Engine. The Space Charge. Tube Construction  The Triode. Basic Tube Parameters. Impedance. Triode Parameters. Biasing. Tube Characteristics. Dynamic Plate Resistance. Transconductance. Amplification Factor. Tube Characteristic Charts. The Pentode. Pentode Characteristics. Tube Capacitance. Tube Specifications. Tube Life. 

CHAPTER 2: SINGLESTAGE BASICS (11) SingleStage Triode Amplifiers. Set the Bias. Gain Stage. Triode Models. Simple Algebra. Adding Cathode Resistor. Input Impedance. Output Impedance. Circuit Interfaces. Pentode Models. Summary. 

CHAPTER 3: SIMPLE GAIN CIRCUITS (17) SingleStage Triodes. Fixing Output Impedance. Essential Parameters. Resistor Values. Getting Sufficient Gain. SingleStage Pentodes. Compromises. Tweaky Stuff. Negative Feedback. 

CHAPTER 4: NEGATIVE FEEDBACK (21) Nonlinearity. Measuring Time in Degrees. Adding Sine Waves. feedback Circuits. Passive Networks. Decibels. Phase Change. Benefits of Feedback. 

CHAPTER 5: SINGLE STAGE FEEDBACK CIRCUITS
(27) DirectCoupled Cathode Follower. Negative Voltage Feedback. Gain. ACCoupled Cathode Follower. Feedback in SingleStage Gain Circuits. External Loop Conection. 

CHAPTER 6: MULTISTAGE BASICS (31) AmplifierCircuit Types. Voltage and Power Amplifiers. Preliminary Questions. Parameters. Reducing Distortion. LowFrequency Instability. HighFrequency Instability. Optimization. PushPull Circuits. Continuous Exchange. Balanced Circuitry. HighFrequency Compensation. 

CHAPTER 7: AMPLIFIER PARTS (35) Phase Splitters. PhaseSplitter Design. PhaseSplitter Variation. Setting Design Parameters. Differential Amplifier. Negative Power Supply. Constant Current Source. Other ConstantCurrent Source Benefits. ConstantCurrent Source Outputs. The Cascode. Circuit Model and Equations. 

CHAPTER 8: OUTPUT STAGES AND TRANSFORMERS
(43) Transformers. Electromagnetism. Magnetic Induction. Current Relationship. Internal Impedance. Transformer Windings. Bifilar Windings. Current Flow. Plate Voltage. Modes of Operation. Bias Mechanisms. SingleEnded Operation. OutputTube Types. FullPower Rating. Peak Voltage. Impedance and Power Specs. Screen Grids. triode Operation. Ultralinear Stage. Phase Shift. 

CHAPTER 9: POWER SUPPLIES AND VOLTAGE
REGULATORS (51) Power and Work. Voltage as Potential Energy. Voltage Stability and Regulation. PowerSupply Design. Regulation. Rectification. FullWave Bridge. Filter Capacitor. Ripple. Conduction Angle. Reducing Ripple. Filter Choke. Voltage Doubler. Rectifier Characteristics. VacuumTube Rectifiers. Power Transformers. Filament Power Supply. Voltage Regulations. Gas Tubes. zener Diodes. SeriesPass Regulators. SingleStage Threeterminal regulator. 

CHAPTER 10: STABILITY NETWORKS (59) Poles. Test circuit. Checking Input Stability. OpenLoop Stabilization. LowFrequency Instability. Spacing Poles. Closing the Feedback Loop. Applying Compensation Networks. Checking Phase Relationships. Make Notes. Feedback Concerns; Stability Margin. 

CHAPTER 11: CLASSIC DESIGNS (63) Learning from te Past. Jafferson 2A3. Amplifier Sections. Williamson Amplifier. Leak RC/PA/U. Fisher 50AZ. Grommes 260A. Dynaco Mark III. Heathkit W6M. McIntosh MC60. Marantz Model 5. Grommes Model 212. Dynaco PAS2. 

CHAPTER 12: PRACTICAL CONSIDERATIONS (79) Test Equipment. Assembly Procedures. Equipment Tips. Component Placement. Choosing Capacitors. Choosing Tubes. Conclusion. 

PROJECTS (82) A Line Level Preamp. A Transformerless Output Amplifier. Test Bench Supply. 

BIBLIOGRAPHY (100)  
INDEX (102)  
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