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Tubes and Circuits (Inglés) Tapa blanda – 17 jul 2012

1.0 de un máximo de 5 estrellas 1 opinión de cliente

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Tapa blanda, 17 jul 2012
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The most up to date vacuum tube design book currently available. Packed with information...Loaded with projects...Nothing like it anywhere! Join Transcendent Sound’s Bruce Rozenblit as he takes you on a journey from the basics of tube circuitry, through advanced designs. Tubes and Circuits is a condensed engineering manual that teaches the theory and operation of vacuum tubes—as well as circuit design. In addition, five projects are included that you can build. Projects provide step-by-step design procedures, equations, schematics, parts lists, and photos to assist the hobbyist in construction. Build a state of the art, very low cost, 15W OTL (output transformerless) amplifier. Complete plans for a 300B OTL. Own most glorious 1 watt in all of audio. Pure single-ended, Class A sonic heaven. (See website for updates, www.transendentsound.com) A tube tester that tests virtually all current production audio and guitar amp tubes—can be user modified to test any tube; a simple device used for testing most octal based rectifier tubes and a tube analyzer used for manually determining tube constants and bias currents. Tubes and Circuits provides all design procedures and equations necessary to allow readers to create their own designs. Practical methods are revealed—all built upon a solid theoretical base. Bruce Rozenblit shares his decades of experience designing hi-end tube audio equipment. Nothing has been held back. Topics include the essential physics required to understand circuits. Explains in detail what electricity is and how it works. Shows how DC current flows and behaves through resistive elements. Detailed information on AC circuit theory, reactive elements, and how they affect signals. What inductance is and how it is created. How components are used to create networks and interact with each other— includes transformer theory. Shows how feedback works and how best to use it. Reveals in detail the chemical and physical processes of how vacuum tubes function, generate current, age, and deteriorate. Shows how the electric fields inside vacuum tubes cause them to work. Demonstrates what tube constants are and how to use them. Shows how to use tube characteristic charts to derive the tube constants used in design equations. Explains load lines and their application. Detailed operation and all design equations for virtually all of the tube circuits used in high-end audio. Includes single-ended and push-pull transformer coupled output stages. Basic information on power supply design and function. All of the theory is put to use and made practical in the project chapters. Learn how to design OTL amplifiers. Anyone that uses vacuum tubes, from the hobbyist, the musician, to the design professional, would benefit from Tubes and Circuits.

Biografía del autor

Bruce Rozenblit is the President and Chief Engineer of Transcendent Sound, Inc., which specializes in vacuum tube audio kits for the DIY audiophile. He specializes in OTL (no output transformer) amplifiers that produce maximum fidelity. He holds a U.S. patent in amplifier design. He has been professionally involved in the audio industry since 1996, a lifelong audiophile and started working with tubes by 1985. This is his third book on audio technology.

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Realmente el peor de todos los que he comprado en esta materia. De hecho, el único malo.

Más de medio libro explica la física básica de la materia, la del electrón y por fin, a más de medio libro, empieza a hablar de algo parecido a un amplificador a válvulas. casi sin información sobre fuentes de alimentación.... Montajes protegidos intelectualmente, con presumiblemente falta de información sobre los componentes necesarios y, probablemente con algún dato erróneo... No voy a conectar ninguno de mis altavoces a estos esquemas. La mayoría son OTL sin protección... no ha complido en absoluto las expectativas que indicaba.

No es en absoluto recomendable, ni para usuarios avanzados ni para principiantes.
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Amazon.com: 4.3 de un máximo de 5 estrellas 27 opiniones
7 de 8 personas piensan que la opinión es útil
5.0 de un máximo de 5 estrellas Circuits 101 7 de noviembre de 2013
Por david Boyd - Publicado en Amazon.com
Compra verificada
I was one of the first persons to buy this book so I have had a lot of time with it. I have been involved in tube electronics for over 40 years and have built kits and modified existing tube preamps and amplifiers but never fully understood how the different components worked with each other or how to size them. This book answered almost all of my questions in a simple straight forward way. One thing about this book, a lot of information is contained in a very few words so every time I reread a section I locate information that I thought he did not cover. Worth every penny.
9 de 11 personas piensan que la opinión es útil
2.0 de un máximo de 5 estrellas Who is this book for?? 26 de febrero de 2014
Por Valve Nut - Publicado en Amazon.com
I never thought I'd say this, but this book spends TOO long on the fundamentals. Out of 268 pages, 148 cover elementary phyiscs and electronics, starting with stuff like speed, velocity, force, and work. It eventually gets up to a fairly lengthy discussion of the construction of valves, even going on to cathode chemistry and solid state conduction, and the potential distribution inside various tubes. Interesting, I suppose, but practically useless.

Finally on page 149 he gets to the good stuff -some basic valve circuits, but it's a whistle-stop tour that lasts 55 pages. Power supplies get just 7 pages.

Then he presents his pride and joy -a couple of OTL projects (although the interior photos look distinctly amateur -all rats nests). Also a simple tube tester is included. I wouldn't dare connect my speakers to one of his OTLs mind you; they have no offset protection at all.

Anyway, it's a weird book. It seems like a beginner's physics/electronics book that suddenly has a couple of exotic tube amp circuits bolted on the end! With precious little tube electronics in the book, it certainly is NOT "the most up to date and comprehensive vacuum tube design book currently available."

And all his battery symbols are backwards.
5 de 6 personas piensan que la opinión es útil
5.0 de un máximo de 5 estrellas Build your own 19 de junio de 2013
Por adam wilson - Publicado en Amazon.com
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Bruce Rozenblit is a superb engineer who has designed amazing amplifiers for DIYers. I bought this book chiefly as I wanted the designs for his latest and greatest amps (I have built 3 others, 1 from his earlier book 'Audio Reality' and 2 from his website). Every one has been a marvel. If you want some of the best value in audio available and don't want the hassle of sourcing your own parts, buy his kits. If you like to do everything your self, buy the book and implement his designs. You won't be sorry.
13 de 18 personas piensan que la opinión es útil
3.0 de un máximo de 5 estrellas Not Quite What I Expected or Needed.......... 26 de diciembre de 2012
Por The Jaundiced Eye - Publicado en Amazon.com
Compra verificada
After reading a favorable review of this book in Vintage Guitar magazine, I ordered a copy to enhance my knowledge of guitar amplifier circuits. Upon arrival I was disappointed to find that my $32+ had purchased a rather thin paperback book a little larger than a Reader's Digest. Then, quite frankly, the text and projects disappointed even more. After a lengthy review of high school physics, the author covers some interesting material (circuits) and then digresses into (for me) less compelling topics such as output-transformerless (OTL) hi-fi amplifiers and several projects that were of absolutely no interest, including the construction of a tube tester.

Perhaps an audiophile, in need of a homemade tube tester and interested in the design and construction of OTL audio amplifiers, would find this book to be a valuable asset; but to those, like me, who simply want to know more about traditional tube-amplifiers (with output transformers), its assets were greatly outweighed by its cost. At $12.95 I would have kept it......but at $32+ I returned it for a refund (which did not include postage either way).

In conclusion: I strongly suggest that prior to order, you carefully study the overview of contents (available on Amazon), to be sure that this book is really what you're looking for. Even though it was reviewed in magazines like Vintage Guitar, it is primarily focused on rather esoteric OTL hi-fi amps.
11 de 15 personas piensan que la opinión es útil
5.0 de un máximo de 5 estrellas Audio DIYer's "must-have" 30 de julio de 2012
Por CharlieM - Publicado en Amazon.com
The long awaited follow up to "Audio Reality," this new book "Tubes and Circuits" is more in-depth and loaded with tons of useful and specific information. For anyone interested in electronics in general and tubes in particular. All presented in a manner in which even "non technical types" can follow. Although written for anyone, this is a "must-have" edition for any Do-It-Yourself (DIY) audio enthusiast, especially "tube-o-philes" or "tube-o-holics" if for no other reason than the included projects alone. Some of the projects presented are world class, tube-based, ingenious OTL (Output-Transformer-Less) amplifiers with printed curcuits and parts lists included. If you're into tube based audio this is the only book you'll ever need and one you'll definately want in your pile/stack/stash of literature. I already consider it reference material. Highly recommended!