Yaesu ATAS-120A Antenna Mobile
Yaesu ATAS-120A – Multiband Mobile Antenna with Automatic Tuning for Ham Radio Operators
✅ Frequency Coverage:
- HF: 40m, 30m, 20m, 17m, 15m, 12m, 10m
- VHF: 6m, 2m
- UHF: 70cm
✅ Technical Features:
- Maximum transmit power: 120W
- Integrated motorized automatic tuning
- Mounting on PL base
- Antenna type: Omnidirectional, Screwdriver design
- Connector: PL plug
- Installation height: 1400–1600 mm (variable)
- Weight: approx. 900 g
📡 Product Description
The Yaesu ATAS-120A is a vertical multiband mobile antenna for stationary or mobile use, designed for amateur radio operators. Thanks to its built-in motor, the antenna automatically adjusts the coil length to match the selected frequency. Typical SWR is ≤ 1.2:1, so no external tuner is required.
The antenna connects directly to compatible Yaesu transceivers using only the coaxial cable, which carries both the HF signal and tuning control.
📻 Compatible Yaesu Transceivers:
- FT-100D, FT-450, FT-847, FT-857, FT-891, FT-897, FT-991, FT-DX10, FT-710
- With MFJ-1925 control unit: compatible with other HF rigs
- For VHF/UHF operation: ATBK-100 radial kit recommended
- With dual antenna outputs: optional diplexer required
🏠 Installation & Applications
Ideal for use on vehicles (cars, RVs) or stationary setups (balconies, rooftops, terraces). The ATAS-120A is rugged and can be used while driving, provided it’s mounted on a solid PL base.
Note: A standard magnetic base is not sufficient for optimal coupling. Reinforced mounting accessories are recommended.
For stationary operation, radials are required as a counterpoise. In mobile use, the vehicle chassis acts as the counterpoise.
📦 Technical Specifications
- Product name: Yaesu ATAS-120A
- Multiband: Yes
- Color: Black
- Compatible with: FT-100D, FT-847, FT-DX10, FT-450D, FT-857, FT-891, FT-897, FT-991A
- Supported bands: 40m – 70cm
- Height: up to 1.6 m
- Weight: 1 kg
- Antenna type: Omnidirectional
- Design: Mobile Antenna (Screwdriver)
- Connector: PL plug