The SG-103 is a broadband dipole antenna system for 2-28MHz operation. Maximum power rating of 150W CW. VSWR on all frequencies is better than 2:1. The antenna is 90 feet long for installation as a flat-top antenna, inverted "V" or a sloper. Supplied with a 50 ohm SO-239 connector. (Coaxial feed line must be ordered separately).