Sirio Antenna GPA4070 40-70 MHz Ground Plane Base Antenna<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Base station antenna， mono-band omnidirectional， unity gain made of aluminum alloy 6063 T-832 perfect protection against the worst weather conditions </span></li><li><span class="a-list-item"> Type: 1/4λ ground plane large band frequency range: 135 - 175MHz impedance: 50ω radiation (H-plane): 360° omnidirectional radiation (E-plane) </span></li><li><span class="a-list-item"> Type: 1/4λ ground plane large band frequency range: GPA 40-70: Tunable 40 70 MHz， Impedance: 50ω， radiation (H-plane): 360° omnidirectional </span></li><li><span class="a-list-item"> Bandwidth @ SWR ≤2: ≥3.7 MHz @ 40 MHz， SWR @ res. freq.: ≤ 1.2 @ start freq.， max. power (CW) @ 30°c: GPA 40-70: 1000 watts， connector: UHF-female </span></li><li><span class="a-list-item"> Materials: Aluminum， chromed brass， nylon， wind load </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/31a0tbj0PoL.jpg" noproxy>