Reviews of previous "Jam-packed with theory, circuit analysis, and DIY basics, it will walk you through all stages of design so that you can create your own wonders. Jones is an ex-BBC engineer with a cool writing style and you ll find it a no-pain education." Hi-Fi News and Record Review"Valve Amplifiers is an extremely well written book, containing a wealth of information that all audio designers and builders will find useful." Glass AudioValve Amplifiers is a market leader for one simple in this specialist area it is recognized as the most complete guide to valve and vacuum tube amplifier design, modification, analysis, construction and maintenance. It is truly the all you need to know guide, and enables audio and circuit designers to succeed with their valve amplifier designs and projects.This book enables readers to understand, create, reconfigure and personalize high-end, audiophile quality amplifiers. Following a step-by-step approach to design, with little maths and lots of know-how, it starts with a brief review of electronic fundamentals relevant to valve amplifiers, simple stages, compound stages, linking stages together, and finally, complete designs.The new material included in this Fourth Edition ensures this book will stay at the top of any audio designer s or enthusiast s reference list.What s new within the Chapter 1: Charge amplifiersChapter 2: Additional circuits, semiconductor constant current sources expandedChapter 3: Entire new section on noiseChapter 4: Lots of new measurements to explode or explain audio folkloreChapter 5: Astonishingly quiet, but cheap and simple HT supplyChapter 6: New power amplifierChapter 7: New hybrid balanced RIAA stage, attenuator law fakingVA3's focus was on distortion, but in VA4, focus is pushed towards background noise reduction. If that wasn t enough, there s more explanation, more measurements, more references, and plenty of new one-liners, any one of which might save hours of trouble.* The practical guide to analysis, modification, design, construction and maintenance of valve amplifiers* The fully up-to-date approach to valve electronics* Essential reading for audio designers and music and electronics enthusiasts alike
i read this as a result of having to fix and old Eico amp. (turned out the coupling Caps were bad)
Anyway, as I recall, a great deal of the book was spent covering the advantages and pitfalls of particular designs Mr. Freeman had built - instructional, yes, in the sense of a being a good "Applications of Theory" sort of course, but still. I thought the book could use a bit of trimming down, the theory sections were admirably non-technical, clear, and concise - the applications thereof could have been more concise.
I should add - when I say non-technical - I am a mechanical engineer, so technical does not scare me. But excessively theoretical descriptions can often leave even engineers floundering when it comes to applying the theories. This book did a good job of that. (Are you listening, oh former professors of mine?)
This book, although it concentrates on hi-fi design, greatly assisted me in progressing from the copying of existing designs into designing my own guitar amplifiers. Certainly the best book I have in my library on valve-amp design and, very importantly, some of the practicalities of building them.