The book contains descriptions, diagrams and data of almost all receivers currently produced by our industry, as well as receivers that have already been discontinued, but are still often used in the radio industry. The book also contains information about a number of new broadcasting receivers, which by the time the work was completed had not yet been put into production, but the release of which could be expected in a short time. For some of these receivers, as not having quite completed industrial design by the indicated time, it was necessary to give less detailed information than for receivers currently produced or previously produced.