Over 11 dB gain on 70 centimeters! The Diamond X510HDM base station antenna is a masterfully built, high performance antenna you will be impressed by.
Diamond X510HDM Dual Band High Performance Gain Vertical Antenna. 2m/70cm, Element Phasing: 3-5/8l/8-5/8l, Gain (dB): 8.3/11.7, Watts: 330 (2m) / 250 (70cm), length 17.2 ft.