Эта новая книга Джона Филдинга, ZS5JF, предназначена для всех, кто использует или рассматривает возможность использования линейного усилителя HF или VHF. Хотя некоторые любители могут считать, что лампы - это устаревшая технология, а полупроводники - лучший путь, Джон Филдинг очень определенно думает иначе! После прочтения этой книги у вас не будет иллюзий, что, по его мнению, лампы намного превосходят полупроводниковые устройства для большинства линейных усилителей. Автор говорит: «Когда вам нужна реальная сила и очень хорошая линейность, лампы очень трудно превзойти».
This new book by John Fielding, ZS5JF, is for everyone who uses – or is considering using – an HF or VHF linear amplifier. While some amateurs may be of the opinion that valves are an obsolete technology and semiconductors are a better way, John Fielding very definitely thinks otherwise! After reading this book you will be under no illusions that, in his opinion, valves are far superior to semiconductor devices for most linear amplifier applications. As he says, “When you need real power and very good linearity, a valve is very hard to beat.”
Essential reading for anyone building a valve linear amplifier, the author guides the reader through the choice of valves for various purposes. Valve Amplifiers Explained starts with a chapter on basic valve theory and explains how to interpret valve characteristic curves. The various classes of operation of amplifiers – Class A, Class B, Class AB1, Class AB2 and Class C – are all covered in detail. The relative merits of grounded cathode and grounded grid amplifiers are discussed and a chapter is devoted to the causes of distortion in valve amplifiers – and how to avoid such distortion. The author explains that linearity is primarily a function of the power dissipation of the device and the supply voltage and he devotes a whole chapter to good power supply design. The various protection circuits that an amplifier should have are also covered. While the book is equally relevant to HF and VHF enthusiasts, a chapter is devoted specifically to the design of VHF RF power amplifiers. Another chapter even discusses liquid cooling of valve amplifiers.
There is advice too for those who, instead of building an amplifier, are considering purchasing a commercially-made linear. Those who use commercial linear amplifiers and want to understand more about how they work will not be disappointed.
As John says, “There is a certain aura about valve equipment. The glowing filaments and the gentle buzz of a high voltage power supply are a sort of magic few have had the pleasure of knowing.” After reading Valve Amplifiers Explained you will want to join that elite few!
Morgan Jones' Valve Amplifiers has been widely recognised as the most complete guide to valve amplifier design, modification, analysis, construction and maintenance written for over 30 years. As such it is unique in presenting the essentials of 'hollow-state' electronics and valve amp design for engineers and enthusiasts in the familiar context of ...
This second edition of the highly acclaimed RF Power Amplifiers has been thoroughly revised and expanded to reflect the latest challenges associated with power transmitters used in communications systems. With more rigorous treatment of many concepts, the new edition includes a unique combination of class-tested analysis and industry-proven design ...
A Comprehensive and Up-to-Date Treatment of RF and Microwave Transistor Amplifiers This book provides state-of-the-art coverage of RF and microwave transistor amplifiers, including low-noise, narrowband, broadband, linear, high-power, high-efficiency, and high-voltage. Topics covered include modeling, analysis, design, packaging, and thermal ...
Master the art of audio power amplifier designThis comprehensive book on audio power amplifier design will appeal to members of the professional audio engineering community as well as the hobbyist. Designing Audio Power Amplifiers begins with power amplifier design basics that a novice can understand and moves all the way through to in- ...
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