Book series "To help the radio amateur" combines the works of domestic and foreign specialists in the field of electronics and radio engineering. The books of the series present a huge number of schematic diagrams of devices, systems, devices. The technical characteristics of the devices under consideration are given, the theory of operation of both circuit elements and assembled circuits is presented, detailed descriptions of work with programs for debugging and programming circuit elements are given. The books can serve as a reference for professionals and aspiring amateur radio enthusiasts, as well as students of technical universities and colleges.