By the ionosonde in Kazan with 1 ionogram per minute long term observation at Es layer echoes was carried out. On a gain curve of Es layer frequency range dependence of amplitude of echoes the deep quasiperiodic variations looked like interference beats are found. Interference located about ~4 MHz in the afternoon and ~2 MHz at night and have extent of ~0.5-2 MHz. A Range between minima increase from 40 to 400 kHz with growth sounding frequency. The approximating dependence as a function distances between local minima with growth of frequency is found. For recover definition beats variations of virtual heights of layers Es with improved precision are investigated. On the base of a difference of heights on various frequency part of a trace, the most probable explanation is the interference magnetoionic component.