Effect of regenerative amplification of atmospherics in field ELF registering complexes

The effect of regenerative amplification of atmospherics in the field ELF registering complexes is considered. It is shown that this effect is observed in the frequency range 200-900 Hz in the conditions of using of certain aerials and grounding with the presence of increased damping of the ELF waves, for example in day time. Some practical consequences are discussed.