3db Racing Antenna

Expand you communication range with the 3db Racing Antenna. This ground plane antenna requires 18" of unobstructed space on a metal surface. If you have a roof rack, light bar, or need to mount somewhere other than the center of the roof, select the No Ground Plane Antenna. Frequency Range: 138-174mHz Please specify race channel in notes above or we will tune (cut) to mid (151.625) Cut Chart Frequency Whip Length 150 MHz 45 1/8" 151 MHz 44 3/8" 152 MHz 44 1/8" 153 MHz 43 3/4" 154 MHz 43 3/8" 155 MHz 42 7/8" 156 MHz 42 5/8" 157 MHz 42 1/4" 158 MHz 41 3/4" 159 MHz 41 1/4"   Mounting Instructions Mounting your antenna properly determines the range of your two-way radio. A metal roof with an antenna mounted in the center with no obstructions (roof rack, light bar) 18" in every direction provides the farthest range. Roof Racks - Mount the antenna at the highest point of the rack. Use a no ground plane antenna. No Roof - Pick a spot in the middle of the car. The int