03-07U

The static susceptibility in the superconducting channel is investigated for the case of the pseudospin-electron model with tunneling splitting of levels at weak pseudospin-electron interaction. In the $\mu =const$ regime the system undergoes the phase transition to the phase with modulation of the latttice period (the chemical potential is located near the centre of the band, half filling), the transition to the superconducting state is revealed for non-half filling of the band and for the case of nonzero tunneling frequency $\Omega $. The influence of the tunneling splitting on the phase transitions is investigated.