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Valve Amplifiers
of: Morgan Jones
Elsevier Trade Monographs, 2003
ISBN: 9780080474724 , 640 Pages
3. Edition
Format: PDF
Copy protection: DRM
Cover
1
Table of Contents
6
Preface
10
Dedication
12
Acknowledgements
14
Chapter 1 Circuit analysis
16
Mathematical symbols
16
Electrons and definitions
17
Potential dividers
30
Alternating current
38
Active devices
59
Silicon diodes
60
Bipolar Junction Transistors (BJTs)
63
General observations on BJTs
69
Feedback
69
The operational amplifier
72
References
78
Further Reading
78
Chapter 2 Basic building blocks
79
The common cathode triode amplifier
79
The tetrode
101
The beam tetrode and the pentode
103
The cascode
109
The cathode follower
115
Sources and sinks: definitions
119
The common cathode amplifier as a constant current sink
120
The cathode follower with active load
124
The White cathode follower
125
The mu-follower
130
The Shunt Regulated Push-Pull (SRPP) amplifier
135
The beta-follower
140
The differential pair
142
Semiconductor constant current sinks
148
References
155
Further Reading
156
Chapter 3 Distortion
158
Defining distortion
158
Digital concepts
166
The Fast Fourier Transform (FFT)
169
Designing for low distortion
172
AC operating point
172
DC operating point
176
Distortion reduction by parameter restriction
181
Distortion reduction by cancellation
184
DC bias problems
185
Individual valve choice
193
Coupling from one stage to the next
204
References
215
Further Reading
216
Chapter 4 Component technology
217
Resistors
217
General considerations on choosing resistors
226
Capacitors
226
Different types of capacitors
229
General considerations in choosing capacitors
240
Magnetic components
244
Inductors
244
Transformers
250
Why should I use a transformer?
262
General considerations in choosing transformers
263
Uses and abuses of audio transformers
268
Thermionic valves
270
Individual elements of the valve structure
274
References
304
Further Reading
305
Chapter 5 Power supplies
307
The major blocks
307
Rectification and smoothing
308
Regulators
343
A practical design
366
Specification of the power supply
366
A better power supply
380
References
391
Further Reading
391
Chapter 6 The power amplifier
392
The output stage
392
Classes of amplifiers
398
The push-pull output stage and the output transformer
401
Output Transformer-Less (OTL) amplifiers
408
The entire amplifier
409
The driver stage
409
The phase splitter
411
The input stage
422
Stability
423
Classic power amplifiers
427
New designs
438
Single-ended madness
439
The 'Scrapbox Challenge' single-ended amplifier
439
HT choke suitability
446
Push-pull sanity
459
The 'Bevois Valley' amplifier
460
The author's prototypes
468
The traditional approach to power > 10 W
470
Driving higher power output stages
473
The 'Crystal Palace' amplifier
475
'Daughter of Beast'
498
References
504
Further Reading
505
Chapter 7 The pre-amplifier
506
The line stage
506
The volume control
515
Input selectors
528
The RIAA disc stage
531
Noise and input capacitance of the input stage
543
Strays and implementing RIAA
552
Basic pre-amplifier compromises
562
A balanced pre-amplifier
563
The perfect line stage
570
The EC8010 RIAA stage
572
Achieving the RIAA equalization
578
Practical RIAA considerations
585
A line stage
587
References
592
Further Reading
593
Appendix
594
Valve data
594
Square wave sag and low frequency f-3dB
600
Playing 78s
602
Equalization
604
Standard component values
608
Resistor colour code
609
Sallen & Key filters for active crossovers
611
UK sources of components
615
Bargains and dealing directly
616
References
617
Index
618
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