Investigation and development of efficient electromagnetic oscillations sources are one of the topical issues in the field of terahertz radiophysics and electronics. A frequency region is regarded as an explored for which oscillating, amplifying and measurement devices have not been developed. The exploration of the terahertz frequency range is at the initial state. In a review paper, published in one of the USA scientific journal [1], which was devoted to the terahertz radiation vacuum sources there is some reminder of using, a «klynotron effect» in the BWO developed at the IRE NASU.
