title: The autodyne radio spectroscope: the brilliant invention of Ye. K. Zavoisky
abstract: The present paper concerns the preconditions served as the basis for the scientific discovery of the phenomenon of paramagnetic resonance, the stages of its development are discussed. The first stage is associated with the invention of the principle of autodyne reception of radiotelegraph signals with the help of the Meissner oscillator in the beats mode (Henry Round, 1913). The next stage is the autodynes usage as transceivers of radio altimeters designed to determine the height of an aircraft 
journal: Infocommunications and Radio Technologies