The antenna he presents is a hybrid design, needed because of the 2.4-GHz band uplink and 10-GHz downlink on the satellite, also known as QO-100.

The recent Radio World article “Quick, We Need a Temporary AM Antenna” showcased the ingenuity of WJMC engineers as they scrambled to get a station back on the air quickly. While improvised antennas ...

I doubt these Motorola devices are designed to be retrofit with aftermarket antennas.<BR><BR>Does anyone know if it's possible to build a GMRS repeater for under $500?

GMRS Simply Defined As noted on fcc.gov, GMRS has 30 total channels. Channels 1-7 are limited to a maximum effective radiated power (ERP) of 5 watts, channels 8-14 are limited to a maximum of ½ ...

To prevent interference between the antenna and the transmitter, you must place them a minimum distance apart. In general, the more powerful the repeater, the further the minimum distance.