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Tubes and Circuits [Paperback]

Bruce Rozenblit
3.5 out of 5 stars  See all reviews (4 customer reviews)
RRP: 22.51
Price: 20.06 & FREE Delivery in the UK. Details
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Book Description

17 July 2012
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.

Frequently Bought Together

Tubes and Circuits + Building Valve Amplifiers + Designing Valve Preamps for Guitar and Bass, Second Edition
Price For All Three: 68.48

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Product details

  • Paperback: 268 pages
  • Publisher: CreateSpace Independent Publishing Platform (17 July 2012)
  • Language: English
  • ISBN-10: 1477532862
  • ISBN-13: 978-1477532867
  • Product Dimensions: 22.9 x 15.2 x 1.4 cm
  • Average Customer Review: 3.5 out of 5 stars  See all reviews (4 customer reviews)
  • Amazon Bestsellers Rank: 431,582 in Books (See Top 100 in Books)

Product Description

About the Author

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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Most Helpful Customer Reviews
1 of 1 people found the following review helpful
2.0 out of 5 stars Who is this book for? 26 Feb 2014
Verified Purchase
I never thought I'd have to say this, but it 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 valves. 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 a whole 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 valve 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.
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2.0 out of 5 stars Can help you build any tube amp you want.... 9 Jun 2014
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....as long as it's a OTL triode one that will require 8 tubes in parallel consuming humongous amounts of energy and heating your entire house in the process, just to drive a speaker to an acceptable level.

Joking aside, there are some good parts to the book (notably the part about interpreting tube constants and graphs) but it's mainly a hodgepodge of electrical theory and topics that sometimes go too much in depth and sometimes barely scratch the surface. Then suddenly it's all over and circuits are treated. As I said, the author specialises -via his company- in OTL amplifiers. I'm not a fan but they merit mentioning and it's only normal that a couple of circuit examples are treated. But it's not normal that the same information is not provided for push-pull amplifiers, output transformers, feedback mechanisms....

I would not recommend this book, the good parts can be found in open source works such as the Radiotron handbook. Save the money and invest it in more complete and didactic works such as those by Morgan Jones, also available on Amazon.
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5.0 out of 5 stars excellent info 21 Mar 2014
By Icarus
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There is lots of detailed information here which is written in an easy to understand manner- well worth the money
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5.0 out of 5 stars Words of Wisdom from one of the Best 21 Jun 2013
By RP
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I purchased this book when it was originally published, primarily for the excellent circuit designs that the author includes in the latter sections of the book; I am an audiophile who has been building their own amplifiers and loudspeakers for quite a while now and my last two amplifier builds have both been designed by the author and both have delivered truly audiophile performance and great value for money. I plan to build the 300B design from this book shortly.

Recently I have been re-reading parts of the book and it is certainly helping to develop my understanding of this technology. I have no formal training or background in electronics and the author's approach and style certainly presents topics in an easily digestible style and manageable chunks. I already own the author's earlier book on valve amplifiers, which is also an excellent introduction to this topic and the titles complement each other well.

I recommend both of the author's titles if you want a good grounding in valve amplifier technology and an insight into the designs of one of the world's leading amplifier designers.
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Most Helpful Customer Reviews on Amazon.com (beta)
Amazon.com: 4.3 out of 5 stars  22 reviews
10 of 13 people found the following review helpful
5.0 out of 5 stars Audio DIYer's "must-have" 30 July 2012
By CharlieM - Published on 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!
3 of 3 people found the following review helpful
5.0 out of 5 stars Circuits 101 7 Nov 2013
By david Boyd - Published on Amazon.com
Verified Purchase
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.
2 of 2 people found the following review helpful
5.0 out of 5 stars excellent book on understanding electronic theory! 8 Jun 2013
By Thomas Wong - Published on Amazon.com
Verified Purchase
a good summary on electronics with the promise of great sounding projects at the end of the book. A good companion to Audio Reality.
4 of 5 people found the following review helpful
5.0 out of 5 stars Build your own 19 Jun 2013
By adam wilson - Published on Amazon.com
Verified Purchase
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.
4 of 5 people found the following review helpful
5.0 out of 5 stars Fun and interesting 15 May 2013
By magellan - Published on Amazon.com
It's not as easy to find good books on tube electronics anymore, in this age of the semi-conductor. But tubes have their own fascination and features that make them unique, which starts with the fact that tubes are basically voltage-controlled devices and transistors are basically current-controlled devices.

This book contains a fun collection of DIY projects aimed mainly at those interested in building their own OTL (output transformerless amps). But there are several other projects as well, such as a tube tester and a low power amp that are also interesting in their own right. There's tons of miscellaneous useful information on various tube concepts that will expand your knowledge. The book starts out with a basic introduction to electronics and tubes that even an inexperienced non-hobbyist and non-engineer would be able to follow with a little effort.

If you want a general introduction to tubes that includes more specialized tube concepts such as lighthouse tubes (a type of triode tube useful in ultra-high frequency applications such as microwave communications), cavity resonators and cavity magnetrons, tube waveguides, or klystron tubes (also useful in microwave ovens and particle accelerators), you'll need to get a text on general communications electronics such as the classic book by Robert Shrader. But for a terrific little hobby book with some great projects and easy to understand explanations you won't find better than this book.
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