The Yaesu ATAS-120 Active Tuning Antenna System provides HF/VHF/UHF coverage with automatic motorized tuning. It is the successor to the popular ATAS-100. Utilizing control signals from the transceivers microprocessor received via the coaxial cable, the ATAS-120's internal motor adjusts the radiator length for best SWR. The ATAS-120 covers the 7, 14, 21, 28, 50, 144 and 430 MHz amateur bands and is compatible with the FT-100, FT-847 and FT897.
M type mount is used. This antenna is approximately 5.25 feet high. Triplexer required (not supplied).
If you are living in an apartment, townhouse or other location where you do not have space to install an antenna you might consider the ATAS-120 along with the optional ATBK-100 Antenna Base kit. This VHF/UHF counterpoise kit will get you on the air fast.