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Meet 'Balun One Nine', a small, cost-effective balun. An excellent way to attach a long wire antenna to the Ham It Up, this 1:9 balun has an SMA output port and high-quality spring-type terminal block input for your coax. Balun One Nine includes an AntennaGuard varistor on the input, protecting your SDR setup from spurious ESD. The ESD protection is excellent--it passes IEC61000-4-2, an 8kV contact discharge test, with a response time of just 300ps. At 39.2mm x 13.0mm in total size (including connectors!) this balun was designed to be light in weight and light on your wallet. Very low insertion loss of -1.3dB (typical), with a maximum input power of 28dBm. Designed for HF applications, but specifications are accurate to frequencies up to 90MHz .