Abstract: The DC to DC converter contains a transformer, having a primary and a secondary winding and a predetermined leakage reactance existing between the primary and the secondary winding. A rectifier circuit is connected to the secondary and a large filter capacitance is connected to the rectifier to form an output across the filter capacitor adapted for connection to a load. A pair of electronic switches are connected across the input to the converter in series with the primary. A capacitor is included in series with the primary and voltage clamping diodes are coupled to the capacitor to prevent voltage across same from exceeding the input voltage level. Pulse generating means coupled to the load, monitor the load voltage level and provide suitable pulses alternately to said electronic switches so as to cause same to alternately conduct current through the capacitor and through the primary.