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Designing Power Supplies for Tube Amplifiers (Anglais) Relié – 13 octobre 2010

4.0 étoiles sur 5 1 commentaire client

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Format: Relié Achat vérifié
Très bien ! Un bouquin de référence à avoir dans sa bibliothèque si, bien sûr, on s'intéresse à ce sujet technique particulier !
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Commentaires client les plus utiles sur (beta) (Peut contenir des commentaires issus du programme Early Reviewer Rewards) 4.8 étoiles sur 5 18 commentaires
7 internautes sur 7 ont trouvé ce commentaire utile 
5.0 étoiles sur 5 Fills an information gap for amp builders 5 mai 2012
Par Illinois Engineer - Publié sur
Format: Relié Achat vérifié
Good power supply design is as important to an amplifier as the ampifier circuitry itself, and while there are literally dozens and dozens of books on switching power supplies there appears to be nothing of value out there on the linear power supplies that we need to build tube amps. Now there is. Blencowe really covers the ground, starting with transformers and working his way through the various power supplies required for tube amps, and the various and appropriate forms of filtering and regulating the same. Even a chapter on protection and fusing and a chapter on various creative techniques to get the supply voltages you need from transformers you may have on hand! Much more information than you can get searching the net.

I'm an Electrical Engineer that doesn't do much analog work, and I welcomed the fact that all of the math was algebra, and all the explanations were strightforward to anyone that understands circuit analysis. I really believe that to get 100% out of the book you need to have at least an engineer's or a serious technician's background. That said, there are numerous circuit examples with part values, so the book can be very beneficial to just about anyone that can follow a schematic, solder a connection, and know how not to get electrocuted. I am predominantly interested in audio amps, not instrument amps, and this book is of equal value to both camps.

I like also the fact that Blencowe explodes certain tube myths that I have somehow come to accept, and which have obtained a life of their own on the internet. He talks about the myth of "cathode stripping", and provides evidence that this is a transmitting tube phenomena, and that this happens at an electric field strength level that almost never occurs in receiving tubes.

So I waited patiently for this book to arrive and wasn't in any way disappointed. Because of it I radically changed the power supply design for an amp I was designing and building. Just sorry I left the book in seat 7A of U.S. Air Flight 98.
5.0 étoiles sur 5 This book is great, not only for tube amps 18 septembre 2013
Par Ssound - Publié sur
Format: Relié Achat vérifié
This is a really great book on designing linear power supplies in general not only tube power supplies, of course theres an emphasis on power supplies for tube amplifiers but the material covered by the author is not restricted to tube amps. The book covers a wide range of topics starting with the simple transformer, up to rectification, types of rectification, and beyond, which include transistors, opamp, RLC networks, grounding, etc... you can check the table of contents.

If you are into audio power supplies or linear power supplies, this is a book for you, regardless if you are building a solid state amplifier or a tube amplifier.

The thing I find most amazing about this book is that it covers the rigorous part of the theory quite well while adding a "rule of thumb" and "tip of the trade" approach which further enhances the understanding of the topics, that being said many of the stuff covered in this book is not the typical stuff you will find in an electric circuits book or taught by a professor at the university, for example how to perform tests on an old transformer to determine its nominal working values. If you already have some knowledge on the academic side of electronics, then this book will make you awe on many of the design tips the author offers, its like having an experienced circuit designer teching you the standard stuff while sharing his tricks.

The math is quite simple if you are the EE type, but it might be a bit too much for a beginner. Eventhough you are not really required to perform drill excercises such as a regular textbook, the author makes use of concepts from calculus, vectors, electric circuits, and electromagnetism, so I agree with what the author wrote on the back cover: this is not a beginners book .

All of the above coupled with ocassional and quite tasteful doses of humor, makes this book a joy to read!

Edit 07/20/2015: It is a true shame that this book is no longer in print, I checked the author's webpage and this is what I found:

"15 November 2013: I've been getting a lot of mail about my power supplies book. I'm sorry to say it has been removed from print because I don't like it. It contains too many mistakes and typos, and it doesn't match the style of my preamps book. Now, before you ask, I do intend to update it eventually. It may take a couple of years, however, as I am currently working on a different title. And before you ask your next question, no, it isn't about power amps. I won't be writing about those for even more years! I'm sure this is a big disappointment to many readers, but that's just the way it is. One man can only do so much! The power supply book is therefore unavailable until further notice. Do not email me asking if I have spare copies or PDFs; your email will beignored. "

.....typos and all im glad I got mine!
4 internautes sur 4 ont trouvé ce commentaire utile 
5.0 étoiles sur 5 No Better Contemporary Resource 18 octobre 2011
Par erschlagener - Publié sur
Format: Relié Achat vérifié
Just flipping through this book now, there's an asterisk note at the bottom of page 134:

"* Although as Douglas Adams pointed out, never underestimate the ingenuity of fools."

Any book that cites Mr. Adams is swell by me, but even that aside, nowhere, and I mean nowhere, have I found a more comprehensive and up to date treatment of vacuum tube power supplies. There are whats, and also whys for the various schemes one can use. Explanations are given for some of the bugs/"features" of older amps, which can be designed in if desired, or removed completely. Blencowe gives equal treatment to both.

Having done publications and journalism throughout high school and college, I might also add that the book is very neatly laid out, with clear equations and consistent, freshly drafted schematics. Nary a mangled scan from some 1950s textbook can be seen here.

If you're keen to see what's in store before you buy, PDF previews are available on the author's website, here:


The rest of book is well worth it.
3 internautes sur 3 ont trouvé ce commentaire utile 
5.0 étoiles sur 5 Heavy Reading 21 août 2011
Par M. Adams - Publié sur
Format: Relié Achat vérifié
I had bought his pre-amp book before, and like that one, this book has lots of great information on an often ignored section of guitar amplifiers. Having said that, in my opinion you should already be fairly knowledgeable about amplifier building and operation, AND really be into this topic to buy this book. It is NOT light reading to say the least.

If you have built guitar amps as kits mostly and want to start doing your own designs, or just want to know better how power supplies work, this is a great book. If you are starting out, I would skip it until you have more knowledge, otherwise you may get overwelmed.
5.0 étoiles sur 5 Technical & thorough 13 mars 2012
Par Nightsedge - Publié sur
Format: Relié Achat vérifié
This is the 2nd book by this Author that I have purchased. I am extremely pleased with these works. They are math-heavy but extraordinarily useful. If you are wanting to seriously get into Fire-Bottle Audio of any kind, this and the companion book (Designing Tube Pre-Amps) are easy 5-Star Recommendations. Though intended for the Vacuum Tube Guitar Amp crowd, the author actually comments in every section about the differences in approach between Hi-Fi (Which is what I do), and Guitar. If the author makes a book about power tube and output stages, you can rest assured that it will be on my shelf shortly.
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