The Sirio SD2000U Antenna , Features, Functions and Specifications: Wide-band discone antenna working on 100 - 2000MHz in reception and on many amateur frequencies in transmission (2m, 1,25m, 70cm, 33cm, 23cm). It is made of stainless steel, chromed brass and anodized aluminium to guarantee the best efficiency and performance. Easy to fit, it can be suitable for the installation everywhere. The vertical whip can be removed whenever the 145MHz frequency is not required. Two versions are available: SD 2000U with UHF-female connection, and SD2000N with N female connection

Electrical Data: Type: Discone,

Frequency Range,

(RX band): 100 - 2000MHz,

(TX band)at VSWR< 2:1 : 130...160; 215...440; 610...685; 870...960; 1070...1500; 1620...1800; 1860...2000MHz,

Impedance: 50 ohms Unbalanced,

Radiation(H-plane): 360 Omnidirectional,

Polarization: Vertical,

Gain: 0dBD - 2.2dBi,

Max Power: 200Watts,

Feed System/Position: Direct/Center,

Connection: SD2000N=N-Female, SD2000U=UHF-Female,

Mechanical Data: Materials: Aluminium Chromed Brass, Stainless steel, Nylon,

Wind Load/Resistance: 44N at 150km/h / 150km/h,

Wind Surface: 0.04m2,

Height(approx.): 900mm,

Weight(approx.): 1020gr,

Mounting Mast: Diameter 25 - 54mm.