"This handbook provides outstanding coverage of the present art in high-power vacuum-tube design and operation. After reading this book the reader will be intimately familiar with modern vacuum tubes. Engineers involved with the design, installation, specification, and maintenance of high-power vacuum tubes will find this handbook an invaluable resource in their work. There are certainly very few books on vacuum tubes, and this one provides a wealth of current information on all the common vacuum tubes in use today."—John J. Shea, IEEE Electrical Insulation Magazine, May/June 2013, Vol. 29, No. 3Praise for Previous Editions"…a valuable resource for practicing electrical engineers and others involved with vacuum tubes and related equipment."—E.M. Aupperle, Choice, December 1999