The GP-9 is the highest gain, dual band fixed station antenna available from COMET. If you desire the absolute maximum coverage area, this is the antenna to choose. The radiation pattern is directed to the horizon omni-directionally around the antenna. However, keep in mind that a high-gain antenna pattern has narrow elevation angle. In mountainous areas the pattern may not reach valley floors or mountain tops. If you need to cover areas around the antenna that are a few thousand feet above or below the antenna elevation, the GP-6 may be a better choice due to the wider radiation angle of a lower gain antenna. Manufacturer NCG Comet Model # GP-9 Product Narrative Dual Band 144/440MHz. Three piece fiberglass Specific Freq. (MHz) 144-148 & 440-450 MHz Gain (dB) 146MHz 8.5dBi 5⁄8 wave x 3 446MHz 11.9dBi 5⁄8 wave x 8 Maximum Input Power (Watts) 200 watts Bandwidth >1.5 VSWR 4 MHz (VHF) / 10 MHz (UHF) Direct Termination SO-239 (UHF Female) Overall Length 16' 9" Rated Wind Velocity (MPH) 100 MPH Mount Hdw. Incl. Yes Weight 5 lbs 11 oz Warranty 1 Year A short threaded sleave screws onto the bottom of the antenna providing the antenna/coax connection protection from the elements. Although hundreds are in use in repeater systems, it was not designed for mountain-top installation where extremely high winds, ice and other extreme conditions exist. It performs best in low to mid elevation installations where the high gain radiation pattern is most effective.
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