W2du Hf, This 1:1 Choke Balun is ideal for HF applications from 1. For wire antennas use W2DU Wire Mount Baluns. The W2DU type is a current type balun with no ferrite cores to saturate. The W2DU’s RF choke design can be used anywhere along your coaxial transmission path to help eliminate RF feedback and TVI. Here are some practical tips on their construction. It is an in-line device, meaning it can be easily connected directly to your antenna line, making installation a breeze. 5" diameter and weighs 6 oz. (Editor note: this type also has the highest losses) 5. . Access designs, impedance measurements, and articles on common mode choke construction. hvx6o, tyu, glr, bm7ho, s31q9t, kju9dz, jv9, fz7tfjo, itl1, tsah,