The thermopower and the thermomagnetic power a t low temperatures (4.5 to 77 K) is investigated in As,Sbl-z (z 5 0.3) alloys. Peculiarities of the thermopower are observed, which are associated with the dragging of electrons by phonons. In magnetic fields B > 5 T the Shubnikovde Haas type quantum oscillation of the thermomagnetic power is displaid. It is established, that the As,Sbl-, (5 5 0.2) alloys are semimetals, and the overlapping of the energy extrema of L electrons and H holes increases, when arsenic is added to alloys. B CnJIaBax .4s,Sbl-z (X 5 0,3) MCCJleaOBaHbI TepM03AC M MarHHTOTepMO3aC IIpH HM3KMX