We present convergent close-coupling calculations of electron scatteri
ng on H-like ions within the framework of the S-wave model. The onset
of Z(4) scaling is demonstrated. In addition, elimination of pseudores
onances in the singlet channel is studied via variation of the exponen
tial parameter in the Laguerre basis. The absence of pseudoresonances
in the triplet channel is explained by reference to single-differentia
l ionization cross sections. These considerations have application to
recently developed R-matrix with pseudostates techniques.