Building Valve Amplifiers is a unique hands-on guide for anyone working with tube audio equipment, whether as an electronics hobbyist, audiophile, or audio engineer. This 2nd edition builds on the success of the first with technology and technique revisions throughout, and significantly, a major new self-build project that is worked through step-by-step, putting into practice the principles and techniques introduced in the book. Particular attention has been paid to answering questions commonly asked by newcomers to the world of valves, whether audio enthusiasts tackling their first build or more experienced amplifier designers seeking to learn about the design principles and trade-offs of glass audio. Safety considerations are always emphasized, and the practical side of this book is reinforced by numerous clear illustrations throughout. This is the only hands-on approach to building valves.