This active Antenna unit is designed for use with the FRG-7700 general coverage Receiver allowing good quality reception of signals while using only the attached 1.2 meter telescoping Antenna The active Antenna unit includes an RF preamplifier useful over the entire 150 kHz to 30 MHz range of the FRG-7700 Its gain is adjustable from the front panel allowing precise setting for optimum performance under a wide variety of reception situations.