The book contains many different circuits of receivers and transmitters, amplifiers, modulators, demodulators and stereo decoders, multipliers and frequency dividers, rectifiers and radio measuring instruments. The technical characteristics of the devices in question are given; The diagrams indicate the values of the elements used or provide the formulas necessary for their calculation. All proposed circuits have been tested in practice. The publication is equipped with a convenient rubricator, allowing you to easily find the desired circuit. The book is intended for radio amateurs of average qualification, but can also be recommended to engineers developing electronic equipment.