Ronken Industries, Inc. is a leading manufacturer of AC and DC capacitors, located in Spring Valley, Illinois, near I-80 and I-39 . We provide capacitor solutions for airport lighting, tower lighting, defense contractors, transportation and communications. Specific capacitor implementations include UV curing, UV lighting & printing power supplies, HID lighting, ferro-resonant power supplies, filters, motor run, battery chargers, power factor correction, SCR commutation, snubber, frequency changers, motor speed controllers, static power supplies, harmonic filters, ultraviolet light curing, pumps, compressors, energy discharge, sign and neon lighting ballasts.