This is the Radio Amateur Operator's Handbook, 13th Edition, Revised Edition 1974. It is a must-have for any radio enthusiast, with detailed information on radio communication and operation. The handbook covers all aspects of radio, from basic principles to advanced techniques, and is ideal for both beginners and experienced operators.

With a focus on practical applications, this handbook includes clear explanations and diagrams that make complex concepts easy to understand. Whether you are interested in amateur radio, shortwave radio, or CB radio, this handbook has everything you need to know to get started. Its comprehensive coverage of radio communication makes it an essential resource for collectors and enthusiasts alike.