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Summary form only given, as follows. At the High Current Electronics Institute the first successful wire array implosion experiments on the inductive storage generator GIT-4 with a long conductive plasma opening switch were carried out in 1989. Those experiments were aimed at obtaining the radiation with quantum energy below 1 keV. Recently we carried out aluminium wire array implosion experiments on the GIT-4 generator varying the value of mr/sup 2//sub 0/ parameter from 2.2/spl middot/10/sup -5/ to 2.4/spl middot/10/sup -4/ g/spl middot/cm at different charge voltages and at different values of downstream inductance. Our aims were two-fold: 1. To obtain the /spl eta/-dependence of the K-shell radiation yield and determine the liner parameters which provide a maximum K-shell radiation yield; and 2. To study whether the liner resistance, its inductance and change of its inductance during implosion influences the POS performance. The results of these experiments are presented.