Valve Amplifiers (eBook)

Morgan Jones (Autor)

eBook Download: PDF

2003 | 3. Auflage
640 Seiten
Elsevier Science (Verlag)
978-0-08-047472-4 (ISBN)

Infos

Morgan Jones' Valve Amplifiers has been widely recognised as the most complete guide to valve amplifier design, modification, analysis, construction and maintenance written for over 30 years. As such it is unique in presenting the essentials of 'hollow-state' electronics and valve amp design for engineers and enthusiasts in the familiar context of current best practice in electronic design, using only currently available components. The author's straightforward approach, using as little maths as possible, and lots of design knowhow, makes this book ideal for those with a limited knowledge of the field as well as being the standard reference text for experts in valve audio and a wider audience of audio engineers facing design challenges involving valves.

Design principles and construction techniques are provided so readers can devise and build from scratch designs that actually work. Morgan Jones takes the reader through each step in the process of design, starting with a brief review of electronic fundamentals relevant to valve amplifiers, simple stages, compound stages, linking stages together, and finally, complete designs. Practical aspects, including safety, are addressed throughout.

The third edition includes a new chapter on distortion and many further new and expanded sections throughout the book, including: comparison of bias methods, constant current sinks, upper valve choice, buffering and distortion, shunt regulated push-pull (SRPP) amplifier, use of oscilloscopes and spectrum analysers, valve cooling and heatsinks, US envelope nomenclature and suffixes, heater voltage versus applied current, moving coil transformer source and load terminations.

* The practical guide to analysis, modification, design, construction and maintenance of valve amplifiers
* The fully up-to-date approach to valve electronics
* Essential reading for audio designers and music and electronics enthusiasts alike

Inhalt

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
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
UK sources of components 615
Bargains and dealing directly 616
References 617
Index 618

Produkt-Details

• Erscheint lt. Verlag: 28.8.2003
• Sprache: englisch
• Themenwelt: Kunst / Musik / Theater ► Musik
• Themenwelt: Naturwissenschaften ► Physik / Astronomie
• Themenwelt: Technik ► Elektrotechnik / Energietechnik
• ISBN-10: 0-08-047472-1 / 0080474721
• ISBN-13: 978-0-08-047472-4 / 9780080474724