Iziguquli zodidi lweqokobhe zisebenzisa isichasi-Ukunyuka ikhoyili ngamandla aphezulu e-dielectric ukuxhathisa impembelelo ye-pulse I-Voltage. Ekubeni i-shell-type transformers isebenzisa iikhoyili ezinommandla omkhulu, i-capacitance yochungechunge phakathi kweekhoyili inkulu. Xa a Ukunyuka ifakiwe, iyakwazi Ukuhambisa i I-Voltage ngokufanelekileyo, i-coil ye-surge is a non-oscillating winding, enokuthi icinezele i-oscillation yombane ebangelwa yi-pulse voltage.