Yaesu's patented ATAS (Active Tuning Antenna System) provides HF / VHF / UHF coverage with automatic motorized tuning. Utilizing control signals from the transceiver's microprocessor received via the coaxial cable, the ATAS internal motor adjusts the radiator length for best SWR. The ATAS covers the 7 / 14 / 21 / 28 / 50 / 144 / 430 MHz bands, and is compatible with the FT-857D, FT-991, and FT-450D.
Specifications - Frequency range: 7 / 14 / 21 / 28 / 50 / 144 / 430 MHz bands - Height (Approx.): 4.59 ~ 5.24 ft (1.4 ~ 1.6 m) - Input Impedance: 50 Ohm - Max Input Power: 120W (SSB/CW, 50% Duty) - Matched SWR: Less than 2.0:1 (With proper counterpoise)
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