The Sunair CU Series of Digital Antenna Couplers is an integral part of a complete HF communications system. Designed to match a wide variety of non-resonant antenna loads, Sunair’s offering includes both low-power (150W) and high-power (1kW) versions. The Sunair CU-9125 and CU-9150 should not be equated with lower-grade, intermittent duty units offered by competitors. Our products are rated for continuous duty operation in a variety of environmental conditions, and are currently in service, bolted to the decks of hundreds of military vessels worldwide. Sunair Antenna Couplers are exposed to some of the most extreme environmental stresses, including saltwater, vibration, temperature, and exposure to harsh weather, all while providing exceptional reliability and continuity of service.