Excellent, used condition.

This book is intended to bridge the gap that exists between the elementary and the advanced technical works pertaining to the generation and transmission of electrical energy at radio frequencies.  It was written for the radio operator, both amateur and commercial; for the electronic technician, both student and professional; and for the engineer who has specialized in another field but who wishes to expand his knowledge into that of radio-frequency power.  It can be a guide and reference for anyone interested in the methods and techniques that have been found useful in the handling of high-power electrical energy of radio frequency.  Though this book appears to pertain exclusively to the subject of radio transmission, its objective is not radio transmission alone, but a comprehension of the logical steps by which radio-frequency systems are developed for various purposes.