The ATAS-120A is a unique mobile antenna designed for use with Yaesu the transceivers equipped for the ATAS system, such as the FT-897/-897D, FT-847, FT-857/-857D, FT-891 and FT-100/-100D. The ATAS-120A utilizes a motorized tuning system that resonates the radiating element for lowest SWR without the need for monoband resonating whip assemblies. It is designed to mount directly onto a standard mobile antenna mount (not supplied) which is compatible with its Type “M” (“m/m pitch only”) base connector.
The antenna is approximately 5.25 feet high. A duplex or triplexer, depending on radio, is required (not supplied).