In-depth review of the Yaesu ATAS-120A motorized HF/VHF/UHF radio antenna

Description

Sleek Design and Build Quality

The Yaesu ATAS-120A Auto Tune Antenna impressed me as soon as I unboxed it. Its two-piece design, featuring a motorized lower coil section topped with a stainless steel whip, feels robust and well-engineered. At a maximum length of approximately 5 feet, the antenna strikes a balance between portability and functionality. While it’s specifically designed for mobile use, the lightweight construction (weighing only 0.01 ounces) ensures it doesn’t add undue strain to your setup. However, I’d recommend handling the whip section carefully, as stainless steel, while durable, can be prone to bending if mishandled.

Performance Across Frequency Ranges

The performance of this antenna is where it truly shines. Covering frequencies from 40 meters to 70cm, the HF through UHF range is nothing short of impressive. During testing, the antenna’s motorized trombone section adjusted seamlessly when paired with my Yaesu FT-857D. Its ability to auto-tune by lengthening or shortening the antenna in response to the radio’s tune button is a game-changer. Whether I was working on 40 meters for DXing or switching to UHF for local comms, the transitions were smooth, and the signal clarity was excellent. However, it’s crucial to note that this antenna works exclusively with compatible Yaesu radios, which limits its versatility for users of other brands.

Installation and Compatibility

Setting up the ATAS-120A was relatively straightforward, though there are a few considerations to keep in mind. It requires a suitable mobile antenna mount and coaxial cable, neither of which are included in the box. I used a SO-239 thread mobile mount, which worked perfectly. The PL-259 base thread is a standard design, making it easy to find compatible mounting solutions. Before purchasing, ensure your Yaesu model is supported. Radios like the FT-857D, FT-991A, FT-450, FT-891, and FT-710 are fully compatible, but double-check your owner’s manual for confirmation. I tested it on my FT-450D, and the auto-tuning feature worked flawlessly.

Key Benefits

• Auto-tuning capability: The motorized adjustment is quick and efficient, saving time and effort.
• Wide frequency coverage: Supports operation from 40 meters through 70cm.
• Durable construction: Stainless steel whip and motorized base feel solid and well-built.
• Compact and lightweight: Easy to install without adding extra weight to your vehicle setup.

Areas for Improvement

• Limited compatibility: Works only with select Yaesu radios, restricting its appeal to users of other brands.
• Additional purchases required: Mount and coaxial cable are mandatory but not included.
• Potential durability concerns: While sturdy, the whip section could be vulnerable to bending under rough handling.

Product Rivals

When comparing the ATAS-120A to other mobile antennas like the Comet UHV-6 or Diamond K9000, a few things stood out. The Comet UHV-6 offers a more universal fit, making it compatible with a wide range of radios, but it lacks the fully motorized auto-tuning capability of the ATAS-120A. On the other hand, the Diamond K9000 features a motorized tilt function but doesn’t cover the same frequency range. In terms of signal clarity and ease of use, the ATAS-120A edges out its competitors, provided you’re using a compatible Yaesu radio. However, the additional accessories required for setup could make the Comet a more budget-friendly option for some.

Bang for the Buck

Looking at the price-performance ratio, the Yaesu ATAS-120A delivers exceptional value for users who already own compatible radios. While the need for additional accessories might increase the initial investment, the ease of use and superior performance justify the cost. For serious ham radio enthusiasts who prioritize efficiency and reliability, this antenna is worth every penny. That said, if you’re new to ham radio or on a tight budget, you might want to explore more cost-effective alternatives before diving into this premium option.

Additional information