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Description
Yaesu ATAS-120A Auto Active Tuning AntennasYaesu's patented ATAS Active Tuning Antenna System has been enhanced with the latest model: ATAS 120A. This is a unique mobile antenna that provides HF, VHF and UHF coverage with automatic motorized tuning. Designed for use exclusively with Yaesu transceivers that support ATAS, microprocessor controlled voltages are sent on the coaxial cable to adjust the antenna radiator length for best SWR. Yaesu ATAS 120A active tuning antennas cover the 7, 14, 21,
Yaesu's patented ATAS™ Active Tuning Antenna System has been enhanced with the latest model: ATAS-120A. This is a unique mobile antenna that provides HF, VHF and UHF coverage with automatic motorized tuning.
Designed for use exclusively with Yaesu transceivers that support ATAS, microprocessor controlled voltages are sent on the coaxial cable to adjust the antenna radiator length for best SWR.
Yaesu ATAS-120A active tuning antennas cover the 7, 14, 21, 28, 50, 144 and 430 MHz Amateur bands and are compatible with the Yaesu FT891, FTDX-10, FT-710, FT-991A, FT-991, FT-857D, FT-897D, FT-100, FT-100D and the FT-450D.
They are typically attached to a vehicle hatch or trunk lip UHF mount (not supplied), also available from DX Engineering. They can be adapted to portable operation with the appropriate mount and counterpoise.
Specifications of the Yaesu ATAS-120A Auto Active Tuning Antennas:
* Operational Bands: 40, 20, 15, 10, 6 and 2 meters and 70 cm
* Height, appx.: 4.59 to 5.25 ft.
* Weight, appx.: 1.98 lbs.
* Input Impedance: 50 ohms
* Maximum Power: 120 Watts, SSB, CW, 50 percent duty cycle
* Matched SWR: Less than 2.0:1 with proper grounding or counterpoise
As with any HF, VHF and UHF mobile antenna, performance depends upon the grounding of the mount and bonding to the metal vehicle surfaces to create an optimal ground plane.
Portable VHF and UHF operation is made possible with the addition of the optional Yaesu ATBK-100 Antenna Base Kit. This kit is not required, nor should it be used, for mobile operation.
Designed for use exclusively with Yaesu transceivers that support ATAS, microprocessor controlled voltages are sent on the coaxial cable to adjust the antenna radiator length for best SWR.
Yaesu ATAS-120A active tuning antennas cover the 7, 14, 21, 28, 50, 144 and 430 MHz Amateur bands and are compatible with the Yaesu FT891, FTDX-10, FT-710, FT-991A, FT-991, FT-857D, FT-897D, FT-100, FT-100D and the FT-450D.
They are typically attached to a vehicle hatch or trunk lip UHF mount (not supplied), also available from DX Engineering. They can be adapted to portable operation with the appropriate mount and counterpoise.
Specifications of the Yaesu ATAS-120A Auto Active Tuning Antennas:
* Operational Bands: 40, 20, 15, 10, 6 and 2 meters and 70 cm
* Height, appx.: 4.59 to 5.25 ft.
* Weight, appx.: 1.98 lbs.
* Input Impedance: 50 ohms
* Maximum Power: 120 Watts, SSB, CW, 50 percent duty cycle
* Matched SWR: Less than 2.0:1 with proper grounding or counterpoise
As with any HF, VHF and UHF mobile antenna, performance depends upon the grounding of the mount and bonding to the metal vehicle surfaces to create an optimal ground plane.
Portable VHF and UHF operation is made possible with the addition of the optional Yaesu ATBK-100 Antenna Base Kit. This kit is not required, nor should it be used, for mobile operation.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
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4.8 ★★★★★
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Product Reviews
★★★★★ 5
Perfect!
Fits exactly on my 2000 civic and I have not had any issues!
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Reviewed in the United States on February 18, 2026
★★★★★ 5
Good brand
They work good so far.
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Reviewed in the United States on March 4, 2026
★★★★★ 5
Perfect fit for 2004 Honda Element, Fixed leak!!
Perfect fit for 2004 Honda Element Dx. Fixed my power steering leak and was super easy to install. Took 5-10mins at most. Would definitely buy again, 5/5 stars!!!
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Reviewed in the United States on December 26, 2025
★★★★★ 5
Easy to install
Perfect fit, good quality and value for the price
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Reviewed in the United States on October 17, 2025
★★★★★ 5
Nice filter
Fit my 2024 grand Cherokee and works great
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Reviewed in the United States on June 16, 2025