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Building Valve Amplifiers (Anglais) Broché – 2 août 2004

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For starters and perhaps surprisingly considering its title, this book offers a wealth of practical knowledge that goes well beyond hollow-state applications as many topics are just as relevant in the successful inplementation of solid-state designs...The sheer quantity of practical, tried and true information is most impressive and clearly indicates that many individuals and organizations contributed by sharing the hard-earned skills and expertise. The over 200 high quality illustrations also help to reinforce the points made in the well-written text...I was particularly impressed with the chapter on choosing new and used test equipment. The discussion regarding the advantages and disadvantages of analog and digital meters and scopes is exceptionally well done. The information is presented with a minimum of math yet is well supported by excellent examples and illustrations that clearly bring home the salient points. The reader is truly receiving a concentrated practical course in instrumentation...If you actually intend to create, modify, restore or repair tube audio equipment, I would highly recommend purchasing Building Valve Amplifiers even if you are seasoned by many years of practical experience. I am convinced that all readers will be amazed at the quantity of new useful knowledge it contains.

- James H. Hayward to appear in Andrew Marshall's Audio Ideas Guide Magazine

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In this first chapter, we will investigate how to plan the mechanical layout of a valve amplifier. Lire la première page
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Couverture | Copyright | Table des matières | Extrait | Index
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Commentaires client les plus utiles sur (beta) 24 commentaires
91 internautes sur 98 ont trouvé ce commentaire utile 
shop and compare 12 février 2005
Par Frank Elliott - Publié sur
Format: Broché Achat vérifié
It is safe to assume that if you are considering this book, you feel you have ingested enough theory and are now ready for the nuts and bolts of assembling a vacuum tube amp of your own.

(Not the least of which regards the critical importance of safety when dealing with lethal voltages)

My rating of this book is a little low, inasmuch as the buyer might be disappointed to see so few words about assembly, and so many more chapters of theoretical/empirical esoterica. The author here is no slacker. He obviously has spent a lifetime in the field and has a vast body of expertise to share; and does so in that ever popular British circumlocutive amble. There is indeed a lot of subtle minutiae in the book that is informative, entertaining, and edifying. But aren't we interested in what to do and what not to do and why we do it this way and not that way regarding assembling the actual components? You can find all that info in this book; including what tools will help immensely and save a lot of starting over, and cursing inanimate objects on the way to starting over.

(and be encouraged to discover that even this practised author, Morgan Jones, has a bit of dread when he first powers up-hoping not to see sparks & smoke!)

But there are a couple more books that you might also consider:... On precisely what is taking place in a tube amp, one can do no better than to make sure to have on your electronics shelf, An all American classic by the late great USAF Colonel John Rider (of Rider Technical Publication fame)-a reprint of his superbly well written "Inside The Vacuum Tube". He takes you one step at a time; and at the beginning of a new chapter, reviews "what we learned, and explains what we will now learn and now build upon in the next chapter". In other words, it is a very well thought outand in depth treatise, with a beginning a middle and an end. You will emerge with a command of vacuum tube circuitry.

Once that is digested, ...and perhaps you are precisely at that point now... you want to know exactly why you use this value of resistor, and that value of capacitor, and this arrangement of components, and not THAT kind of resistor, etc,.. and I do mean exactly will find no better book than another fine reprint by the title of "Mullard Tube Circuits For Audio Amplifiers" If it comes down to choosing one over the other, with both time and budget concerns...I'd go for the Mullard book, hands down, nol contendre. It gives all the exact reasons for why we provide feedback, precisely how the phase splitter splits the signal for the push pull, and why we even want a push pull rather than a single ended amp; and diagrams for drilling out the chassis, and time honored, and tested methods of assembly. 'S alright? 'Salright!
51 internautes sur 53 ont trouvé ce commentaire utile 
Definitive, don't build a tube amp without this! 2 octobre 2004
Par Bighairydoofus - Publié sur
Format: Broché
I recently purchased this, the companion work to the author's definitive book on tube amp design, Valve Amplifiers. There are quite a few books on how to design a tube amp, but very few resources available on how to safely construct them. I say safely because vacuum tube amplifiers use voltages that are lethal, some extreme designs using voltages in excess of a kilovolt! Safety is essential when dealing with tube amps at all times.

Originally, the author covered amplifier construction techniques in the first edition of Valve Amplifiers, but that volume is now in it's third edition and is over six hundred pages long WITHOUT the construction section. It's understandable that Mr. Jones decided to put out a separate tome on amp construction, since the construction information is as long as the entire first edition of Valve Amplifiers.

This book goes into great detail on how to build a chassis, wiring techniques, PCB's, metalwork and assembly using only hand tools. Examples are given of tools to be used (often with more than one choice for a given job) and how to use them properly. The book then goes on to explain the use of oscilloscopes, distortion measurements and troubleshooting, completely illustrated with pictures and drawings needed to do these things. There are also useful tricks, such as using a discarded radio tuning capacitor to find the optimum capacitance for feedback compensation.

This, along with Valve Amplifiers, are the definitive modern works for the amateur on how to design and build tube amplifiers. If you're interested in tube DIY audio, there just aren't any substitutes for these books, they're simply the best currently available, period.
20 internautes sur 23 ont trouvé ce commentaire utile 
Useful practical guide to building amplifiers... 28 décembre 2004
Par sir_isaac_newton - Publié sur
Format: Broché
...this book contains a lot of good, hard to find advice on the pratical issues that arise when building a tube amplier. This allows the novice to learn quickly without having to learn only by their own mistakes (which can be dangerous, frustating and costly). There are useful discussions on choosing basic equipment (although perhaps a little too much) such as Digital Volt Meters and Oscilloscopes. The author also usefully discusses sourcing components which is, in my experience, the big hidden work item you run into building your own electronics (especially tube electronics) these days.

This book, sensibly, does not contain a lot of theory (the author moved that to his other book -- which I did not find useful) or circuits for re-use -- but for the practical issues of safely producing a safe, robust, low noise amplifier this book is very good.

My interest is primarily guitar amplifiers and this book is equally applicable to that domain as it is to hi-fi amplifiers, albeit without any special consideration of guitar amplifier issues or circuits.

The authors writing style is fine (it could, perhaps be more concise in some areas) but the pictures and layout of the book are dated and, given that, the price seems high (although this book represents better value than the author's theory book, in my opinion).
5 internautes sur 5 ont trouvé ce commentaire utile 
A book about BUILDING NOT DESIGNING amplifiers 14 janvier 2012
Par Charles Deluca - Publié sur
Format: Broché Achat vérifié
Building Valve Amplifiers is an indispensable book for an amateur learning to construct amplifiers on his/her own; it even includes examples of manufacturer design flaws and how they could have been avoided. The book presupposes no knowledge about electronic/electrical assembly at all and is an excellent introduction.

Two cautions:

(1) After reading many reviews it seems only a few people understand that this book is volume 2 of 2. Volume 1 of 2 is "Valve Amplifiers" Valve Amplifiers, Third Edition and it deals solely with amplifier design - this book does not contain any significant discussion of design principles.

(2) Some reviews seem to be negative for the sake of being negative - one reviewer writes that they have 20 years of experience as an electrical engineer and that they are disappointed in the scope of the book. I would hope an engineer with 20 years experience would be capable of writing such books, not buying them to learn the basics. Take the negative reviews with a healthy dose of salt: as an engineer with 35 years of experience I think Mr. Jones' two books are pretty close to masterpieces for the non-professional.
4 internautes sur 4 ont trouvé ce commentaire utile 
re: Lower ratings 22 mai 2011
Par Ockham - Publié sur
Format: Broché
With appropriate respect for the points made by the various reviewers of this book who gave it an average or below rating, I believe the complaints of those individuals are addressed if one views this volume as the companion to Mr. Jones' "Valve Amplifiers" volume, ISBN 0-7506-5694-8

Together, these two works provide a solid grounding in much of the necessary information necessary to grow one's ability to grasp what is happening inside a valve amplifier. In particular, his empirical work on valve performance and design features which aid or degrade such performance, and his firm grasp of what does and does not affect the tone of the amplifier, are both areas which the more traditional texts simply do not address. It seems to me that when one possesses a firm command of that knowledge one may then move forward, both with classic designs and (one would hope) new and original ideas in valve application.

Of course, if valve amplifier beginners wish to begin with monkey-see, monkey-do designs, there is a wealth of free information on the internet to that end. Such practice is valuable experience...but this is not what Morgan Jones' two volumes are primarily designed to do.

I post this review mostly to remind folks that it is the Morgan Joneses of the world who are both bold enough to publish, and who have the necessary technical acumen, and who have actually done the work of supporting research to validate their published material. Without folks like Jones, the modern valve amplifier landscape devolves into tube rolling, snobbery and myth...a death sentence to the valve art, IMO.

I never cease to be amazed at the number of folks who will spend over five hundred dollars for an NOS GZ34 rectifier because it has the Mullard label on it. More often than not, those same folks cannot articulate even the most basic principles behind good power supply design and its effect on amplifier performance. Yet, those same individuals balk and spending forty dollars on a book which could easily clear that issue up for them, to the immense benefit of the performance of their designs.

In conclusion, I find both of Jones' volumes mentioned herein to be valuable assets, even as I recognize they do not claim to be the end all and be all of valve amplifier design and construction. I applaud him for his work in this area. Rather than being overly critical or myopic about flaws in Jones's book, it might be more beneficial to skip this month's tube rolling expenditure for yet another pair of 12AU7 black plate NOS whatever. Instead, spend that money and help support Morgan Jones and others like him who are still publishing valve related material of sufficient robustness as to reasonably warrant ownership.

As an aside, I would agree with Frank Elliot's point that the Mullard publication, along with Rider's "Inside the Vacuum Tube" are critical pieces to the equation as well, and I would commend them to the valve enthusiast. Good luck finding the Rider volume - the current price is hovering around a hundred bucks, and they are in very short supply. The Mullard publication is, however, available for a very reasonable price on Amazon.
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