Minishpions. Circuit design. Val G.

This book examines many amateur schemes that allow organizing hidden remote listening, tracking mobile objects, monitoring telephone lines and much more. A separate part is devoted to the development of near -acting radio transmitters and diapering of such devices. The presented material illuminates various areas of radio -designing, including oscillators, optoelectronic and television transmitters, a power organization for miniature radio devices, minishpion detectors, approximation and vibration sensors, noise generators, and the methodology for calculating transmitting antennas, etc., due to which it will be interesting to the widest circle of radio amateurs.