This is the classic reference handbook for all who are interested in the design and application of radio receivers and audio amplifiers, and deals with basic principles and the practical design of all types of classic radio receivers, audio amplifiers and record-producing equipment up to the invention of the transistor. This reprint of the classic fourth edition, first published by Iliffe in 1953 and revised in this edition in 1967, provides information that is not available from any other source. It will therefore be invaluable to anyone working with valves, and provides a definitive guide to the valve and other components, audio and radio frequency technology, rectification, regulation, filtering, hum, complete receivers, and sundry data. This book is the work of 10 authors and 23 collaborating engineers, under the editorship of F Langford-Smith. The enormous amount of data included in the book has been made readily accessible by means of a fully detailed list of contents and a very complete index. The main subjects are: valves, valve testing, general theory and components; audio and radio frequencies; power supplies, design of complete AM and FM receivers, and reference information.