Sirio Antenna Sirio GPE 27 5/8, 10m & CB Base Base station antenna, omnidirectional tunable by acting on the whip length low radiation angle for excellent dx coil protected by transparent cover Whip equipped whit waterproof jointing sleeve, made of aluminum alloy 6063 T-832 protection from static discharges DC-ground Type: GPE 27 5/8: 5/8 ground plane frequency range: tunable from 26.4 to 29.0 MHz impedance: 50 radiation (H-plane): 360 omnidirectional Bandwidth SWR 2: 1600 kHz SWR RES. Freq.: 1.3 max. Power: 250 watts (CW) continuous ; 750 watts (CW) Materials: aluminum, steel, copper, nylon wind resistance: 130 KM/H wind load: GPE 27 5/8: 188 N at 150 KM/H wind surface: GPE 27 5/8: 0.13 M