balun one nine v2 - small low-cost 9:1 (1:9) balun with input protection & enclosure for hf & shortwave. great for software defined radio (rtl-sdr & sdrplay), ham it up, and other capable radios nooelec <p>balun one nine v2 is a very small 9:1 balun meant for attaching long wire and dipole hf antennas to your hf capable sdr, radio or ham it up upconverter. it has an sma output port and 3 different terminal block input options (all included) for your antenna coax. <p>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. <p>at 38mm x 25.0mm in total size, this balun is a bit larger than our popular balun one nine v1, but also has better hf performance and can be used to even lower frequencies. for more details, please see the downloads tab on the product page. it was designed to be light in weight and light on your wallet. <p>very low insertion loss with a maximum input power of +24dbm. designed primarily for hf amateur bands, but specifications are accurate to frequencies up to 80mhz+. <p>this is the retail version, which comes assembled into a custom aluminum enclosure and includes 3 antenna connector adapters and a free male sma to male sma barrel connector!