Maxrad MFB 8137 806-866 Mhz Base Antenna, 7 db Gain. Maxrad MFB8137 is a 7 dBd gain fiberglass omni-directional antenna operating in the 806 – 866 MHz frequency range. This omni antenna has a power input of 250 watts, is DC grounded and terminated with an N male connector at the end of a 16 inch jumper. Order mounting hardware separately.