We present our results on high-power repetitive pulse sources for continuous operation. Two 1-10-kW systems using advanced spark gap technology and a transmission line transformer have been tested for several hundred hours at a 60-MW pulse level. High reliability and above 90% overall efficiency are realized. Introducing a DC-bias, we designed a 30-kW hybrid system for industrial corona applications. The DC bias allows better matching, faster spark gap recovery, and higher power.