Providing examples of applications‎,‎ this handbook examines the underlying technology of each type of power vacuum tube device in common use today‎.‎ The author reports on new development efforts and explains the benefits of specific work‎.‎ Basic principles are discussed‎,‎ and supporting mathematics are included to clarify the material presented‎.‎ Extensive technical illustrations and schematic diagrams aid the reader in understanding the maxims of the subject‎.‎This book reviews the latest in new vacuum tube technology ‎- new devices and refinements of existing devices that extend power and frequency capabilities‎.‎ It identifies new applications for commercial and scientific research‎.‎ It examines new frontiers on materials science ‎- directly impacting construction‎,‎ reliability‎,‎ and performance‎.‎ It outlines new methods of power tube design ‎- yielding more efficient‎,‎ lasting tubes‎.‎ It describes new modulation methods affecting power tube design and application‎,‎ including digital technologies‎.‎