Preface

As its title suggests, this book is concerned with the practical problems of building a valve amplifier that has already been designed, making it the companion book to Valve Amplifiers (fourth edition), which contains far more equations and is concerned with circuit design.

This new edition’s word count is more than twice that of the first edition. So where is all the new material? All chapters have been updated, but noting the most commonly asked questions, the metalworking and test principles chapters have doubled in size, and the entirely new practical projects chapter is the second largest. The wiring and performance testing chapters have grown significantly, and an appendix appeared.

Although construction techniques have changed ...

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