Yaesu Motorized Mobile Antenna: 40m through 70cm - ATAS-120

Yaesu ATAS-120A Motorized Mobile Antenna

The Yaesu ATAS-120A Motorized Mobile Antenna is a revolutionary solution for amateur radio enthusiasts, offering unparalleled convenience and performance for multi-band mobile operation. Designed to work seamlessly with compatible Yaesu transceivers (such as the FT-991(A), FT-897D, FT-847, FT-857D, FT-100/100D, and FT-891), the ATAS-120A eliminates the need for cumbersome monoband whip assemblies, providing effortless tuning across a wide range of frequencies.

Key Features and Operation

This unique antenna features a motorized tuning system that automatically resonates the radiating element to achieve the lowest SWR, ensuring optimal performance on the go. Covering the 7, 14, 21, 28, 50, 144, and 430 MHz Amateur Bands, the ATAS-120A offers incredible versatility for HF, 6-meter, 2-meter, and 70-centimeter operations. Its intelligent design allows for quick and precise tuning directly from your compatible Yaesu transceiver. For optimal connection on 144 and 440 MHz bands, a duplexer (for FT-897/857/FT-100) or a triplexer (for FT-847) may be required.

Installation Notes

The ATAS-120A is designed for direct mounting onto a standard mobile antenna mount with an SO-239 connector (mount not included). For proper operation of the motorized tuning system, a well-grounded mount is crucial. Avoid magnet mounts, as they may not provide a sufficient ground path, which is essential for the motor to function correctly. Ensure any chosen mount has excellent electrical contact to bare metal, not just paint, for reliable performance.