YAESU - ATAS-120A - PORTABLE ANTENNA - AUTOMATICALLY TUNABLE FROM 7 TO 430 MHz BY YAESU TRANSCEIVERS WITH ATAS FEATURE
The ATAS-120A is a unique mobile antenna designed for Yaesu transceivers equipped with the ATAS system. The ATAS-120A uses a motorized tuning system that brings the radiant element into resonance for the minimum ROS without having to resort to expensive, inconvenient groups of monoband resonant rod antennas. The ATAS-120A is designed for direct mounting on a normal mobile antenna support (not supplied) compatible with its "M" type (PL-259) base connector.
BY ADDING THE ATBK-100 RADIAL KIT (OPTIONAL) THE ANTENNA CAN ALSO BE INSTALLED IN A FIXED SITE with an extremely compact footprint in situations of limited space.
Yaesu's patented ATAS ™ (Active-Tuning Antenna System) provides HF / VHF / UHF coverage with automatic motorized tuning.
Using the command signals from the transceiver's microprocessor received via the coaxial cable, the internal ATAS monitor adjusts the length of the radiator to achieve the optimum SWR.
ATAS covers the bands of
7/14/21/28/50/144/430 MHz and is compatible with FT-991A, FT-891, FT-857D, FT-897D and FT-450D models.
Frequency range: 7/14/21/28/50/144/430 MHz Amateur bands
Height (approx.): 1.4 ~ 1.6 m
Weight (approx.): 900 g
Input impedance: 50 Ω
Max power input: 120 W (SSB / CW, 50% duty cycle)
Tuned SWR: Less than 2.0: 1 (with adequate counterweight)
Mounted on a stand, it allows excellent portable operations away from the car, which can be optimized by adding radials.
It can also be used at home with suitable brackets and attachments by mounting it on a railing, also in this case it can be optimized by adding radials.