Abstract
A push-pull power output transformer which will deliver 10 kVA over a frequency range from 0.2 to 10 Mc/s is described. The transformer is designed for an 8 to 1 voltage step-down and for a duty cycle of 1 sec in every 10. A toroidal core consisting of 0.0006 in. thick Mumetal tape is surrounded by a polythene former upon which two four-turn primaries are wound. The case itself is a single-turn secondary winding. The core and windings are convection-cooled with paraffin oil. The effects of core proximity and conductor shape on the leakage-inductance, shunt-capacitance product of a single-turn secondary construction are examined. It is shown that a strip winding has no advantages over wire for the primary.
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