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am 26. Juni 2012
Written in a scientific manor but kept basic and composed in a "fun to read" writing style.(you rarely find an electronics book that amuses you and educates you, this is one of them) If you have an idea of electronics you will concider this book to be a fun guide to understand valve amplifiers and everything around them. Even if you do not have that much knowledge about circuits you will understand the themes presended due to the 60 page introdution to amplification priciples really starting from scratch.

All in all an educative guide in which Morgan Jones leads you through the amazing world of amplification priciples keeping the reader interested due to the jucy (not dry) writing style.
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am 6. Februar 1999
If you don't know much about valve amplifiers ['valve' = 'tube' in USA], you will learn a lot by reading this book, which starts from the basics. It is generally readable and easy to understand. In addition to theory, it also covers some very practical aspects the practical [how to cut metal, how to solder, and so on]. The author's style is highly enthusiatic but came across to me as being slightly amateurish.
Its focus is on hi-fi audio amplifiers - it does not touch on valve guitar amplifiers.
What I liked most was the author's down-to earth common sense approach, which he evidently acquired through his training at the BBC. [no nonsense about gold plating your mains fuses here]
What I liked *least* were minor misconceptions and the details he gets wrong here and there. As a few examples, if you took him at his word, you would believe:
- Fitting metal screening to an input valve will shorten its life.
- The B-H curve of a transformer's iron can be treated as the Vin - Vout characteristic.
- The getter in a valve is only effective if the heater is hot before the anode voltage is applied.
Two topics I thought were significant omissions:
- How to measure amplifier characteristics [eg frequency response, power output, distortion].
- How to design feedback amplifiers to get the best performance for a given output transformer.
Troubleshooting [a pretty important topic] is only touched on.
As I said, if you don't know much about valve amplifiers, you can learn a lot from this book and will find it easy to read with lots of useful information. But if [like me] you are put off by incorrect details and a slightly amateurish air, leave it on the bookshelf.
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am 21. April 1998
This book gives a good overall review of tube amplifier design, and has descriptions of the major amplifier topologies such as push-pull, single ended, and output tranformerless. He also covers pre-amp design, and components. The author does tend to dismiss all types other than push-pull pentode as being frivolous. Consequently, most of the output amplifier circuit designs where he goes into detail, are P-P pentode. Nevertheless, no matter what kind of tube amplifier you are designing or modifying, you will find some useful information in this book.
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am 7. Februar 2009
Trotz englischer Sprache hat hier Morgan Jones ein leicht zu lesendes Buch verfasst. Man sollte jedoch nicht "blutiger" Anfänger im Bereich der Röhren bzw. Röhrenvertärker sein.
Mein Werdgang zum Thema war das Buch von Burkhard Kainka, "Röhrenprojekte bis 60 Volt",
dann von Otto Diciol, "Das NF-Verstärker Praktikum",
um nun beim Morgan Jones zu landen.
Hier werden viele Fragen beantwortet, die bisher offen geblieben sind, beispielsweise zum "Klang" von Kondensatoren, Entzerrerung für Phono-Vorstufen und natürlich Formeln zum Berechnen von Röhrenschaltungen.
Viele Grafiken und Zeichnungen erleichtern hierbei die Nachvollziehbarkeit. Das Buch ist mit 600 Seiten Fachwissen mehr als preiswert und wird mich wohl noch einige Jahre, nicht nur als Nachschlagewerk, begleiten.
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am 30. August 2011
Das exemplar ist exemplarisch. Gehoert zu der wenige audio bucher fur die audio- hobbyist oder konstrukteure mit schaltbider die sehr gut verdeutlicht sind.
Seine erfahrung der verschiedene roehren mit messdaten usw.
Die mathematik haelt sich im grenzen. Der killer ist die "Crystal Palace Amplifier" mit roehren 13E1, DC kupplung und CCS (constant current sources)

Valve Amplifiers

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am 28. März 1998
I wanted a book that would help someone build a vacuum tube amplifier who understood basic electronics but who had no prior experience with vacuum tubes (or valves as the British call them). This book was the answer to my search. Morgan Jones does a great job with the book. There were some minor (editing?) errors but these were of no great consequence. From the education in the book, I was able to build a single ended monobloc amp for about $500 which sounds a good as some commercial tube amps costing $5000 (my unbiased opinion)
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am 12. Januar 1998
Morgan Jones has done a marvelous job covering this subject. Almost all of the books on vaccum tube circuits were written over 25 years ago and are hopelessly out of date. Also, he has gone to great legnths to make his book easily understandable to amateurs. This book covers both the theory of operation of vaccum tube circuits and practical designs for builders. Morgan starts at the very beginning and explains the different classes of amplifiers, modes of operation and gives valuable practical advice on tube selection, layout, troubleshooting and design. I have read many books on vaccum tube amplifier design both old an new and have found that this is by far the finest book for both beginners and professionals alike.
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