The Sirio 827 base antenna is one of the most respected antennas around. High performance comes as standard and the 827 will let you transmit much much further than most conventional antennas. The build quality is superb, will give many years of service, and ideal also for amateur use on the very popular 10m (28Mhz) band too. Specification Type: 5/8 ground plane Frequency range: 26-28 Mhz Impedance: 50O unbalanced Radiation : (H-plane): 360deg omnidirectional Polarization: vertical Gain: 1.5 dBd : 3.65 dBi Bandwidth at S.W.R. : 2:1: 2000 KHz S.W.R. at res. freq : = 1.1:1 Max. power : 1000 Watts (CW) continuous Feed system : position: Transformer DC-ground / base Connector : UHF-female Materials : Aluminium, Steel, Copper, Nylon Wind load / resistance : 264 N at 150 Km/h / 130 Km/h Wind surface : 0.23 sqm Length: (approx.): 6700mm Weight : (approx.): 6000g Radial length (approx.) : 1400mm Mounting mast : 35-39mm