Valve Amplifiers

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Product Description
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
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Valve Amplifiers Review
Fifteen years ago, tubes (valves to the rest of the world) were not only out of style, they were almost extinct. The same went for vinyl records. But there were always a few people that didn't buy into the new technology, insisting that tube electronics sounded more in step with the music. I heard my first high end tube amp (a Conrad Johnson MV-45) in 1987 and I've been hooked on the sound ever since. Thanks to a series of events that few could have forseen, the DIY tube revolution is in full swing. The fall of Communism and China embracing capitalism opened the flood gates, making more tube types cheaply available than since the mid-sixties. Add the internet with it's flow of information, and the underground DIY audio scene was born. There's an embarassment of riches now available to the amateur Hi-Fi enthusiast, and this volume is one of the best.
I've owned the first edition of this book for several years and it's absolutely great. It was a logical step up from my first DIY tube amp book, Bruce Rosenblitt's Beginners Guide to Tube Audio Design (now out of print). The first edition clocked in at 300+ information packed pages, covering everything from the performance of different electronic components used in tube amps, amp and preamp projects to chassis construction and design. When the second edition came out, I decided not to buy it thinking it maybe corrected some errors and had some new projects. Now that I've read the third edition, I have a funny feeling that I've missed out. See, the new edition is over SIX HUNDRED pages long, and that's without the amplifier construction section! The amplifier construction techniques are now covered in Mr. Jones' companion volume, Building Valve Amplifiers, in itself a 300+ page book. What this means is if you include the companion volume, there's THREE TIMES the information than in the first edition, over a thousand pages! Not only is there more, but it's better organized and edited than the first edition.
Morgan Jones covers just about every tube related subject, not hesitating to offer his opinions along the way. He doesn't hide his dislike for some current tube audio trends, such as tube power supply regulators and single ended amplifiers. There's a single ended amplifier project in the book, and while it's not a 300B amp project (he rightly says there are enough of those around), he goes through the project with all the thoroughness and care we've come to expect. There are several other projects, including a tube headphone amp, the author's original EL84 amp, a more powerful push-pull amp using 13E1 output tubes, his original "practical pre amplifier" from his first edition, plus a balanced preamp and a new line preamp and phono stage.
The wonderful thing about the projects in this book is that the author doesn't just present the schematic and say "build this", he goes through every step from tube and component selection to each design choice along the way. This isn't just a project book, this is a book that teaches you how to actually design an amp. I haven't built any of the designs in the book (yet), but I have no doubt that they sound very, very good indeed. And for vinyl enthusiasts, the amount of time spent explaining phono preamps is an absolute treasure. You won't find this information anywhere else!
Yeah, it's an expensive book, but worth every penny. The bottom line is this - if you're interested in DIY vacuum tube electronics and don't have this book and it's companion volume, you're limiting yourself. I think even crusty old timers that have been working with tubes for years could learn something from this book. If you've learned everything this book and it's companion volume have to offer, I believe that you could build tube audio electronics that compare to the best that are available, regardless of price.
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