This is an interactive radio teacher. For the convenience of mastering a large amount of material, the book is divided into five independent parts, which allow the reader to step by step go from a novice radio amateur to an advanced developer of electronic devices. Much attention is paid to the study of the modern element base, the basics of radio-electronic technology, as well as the development of the principle of operation of schemes, the methodology for setting them up. Modern programs for modeling electrical circuits (circuits) provide special assistance in mastering the variety of electronic devices. The author talks about the available free modeling programs. Methods of working with virtual measuring instruments are described.