--- product_id: 6742395 title: "ATAS-120A 40 Meter through 70cm Auto Tune Motorized HF/VHF/UHF Antenna For FT-857D, FT-450DandFT-897D ATAS-120" brand: "yaesu" price: "NT$29320" currency: TWD in_stock: true category: "Yaesu" url: https://www.desertcart.tw/products/6742395-atas-120a-40-meter-through-70cm-auto-tune-motorized-hf store_origin: TW region: Taiwan --- # 40M-70cm multi-band coverage Mobile-ready design Motorized auto-tuning ATAS-120A 40 Meter through 70cm Auto Tune Motorized HF/VHF/UHF Antenna For FT-857D, FT-450DandFT-897D ATAS-120 **Brand:** yaesu **Price:** NT$29320 **Availability:** ✅ In Stock ## Summary > 📡 Tune in, stand out — the smart antenna for the savvy operator. ## Quick Answers - **What is this?** ATAS-120A 40 Meter through 70cm Auto Tune Motorized HF/VHF/UHF Antenna For FT-857D, FT-450DandFT-897D ATAS-120 by yaesu - **How much does it cost?** NT$29320 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tw](https://www.desertcart.tw/products/6742395-atas-120a-40-meter-through-70cm-auto-tune-motorized-hf) ## Best For - yaesu enthusiasts ## Why This Product - Trusted yaesu brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Plug & Play Ready:** Standard PL-259 base thread ensures easy integration with your existing mobile mount and coaxial setup. - • **Effortless Auto-Tuning:** Motorized trombone section auto-adjusts antenna length with a single button press. - • **Tailored for Yaesu Radios:** Optimized compatibility with top Yaesu models like FT-857D, FT-991A, FT-450D, and more. - • **Mobile-Optimized Durability:** Designed for automotive use with a robust stainless steel whip and compact 5ft max length. - • **Seamless Multi-Band Mastery:** Covers HF through UHF (40 meters to 70cm) for ultimate frequency flexibility. ## Overview The Yaesu ATAS-120A is a motorized, auto-tuning HF/VHF/UHF antenna designed specifically for select Yaesu radios. Covering 40 meters through 70cm bands, it features a motorized trombone section that automatically adjusts antenna length for optimal signal performance. Built for mobile use with a durable stainless steel whip and standard PL-259 base, it delivers seamless multi-band operation and easy integration for the professional ham radio enthusiast. ## Description Yaesu ATAS-120A Auto tuning antenna designed for the Yaesu FT-857, FT-857D, FT-450D, FT-450AT, FT-991, FT-991A, FT-450, FT-100D, FT-100, FT-891, FT-710, FT-897, FT-897D FT-891 radios, and possibly others, check your Yaesu Owner's manual for compatibility. Tune signal from radio auto adjusts the antenna length. Fully automatic w/ above listed models. Requires an Optional SO-239 thread mobile mount & coaxial cable. (not included) 2 Piece design, Motorized Lower coil section topped with stainless steel whip. Max length approx. 5 ft. For 40M - 70cm Ham Radio use. For Listed Yaesu models ONLY. ## Features - For The Following Yaesu Amateur Radio Models - FT-857D, FT-991, FT-991A FT-897D, FT-891, FT-710, FT-450D, FT-450AT, FT-450, FT-100D, FT-100, FT-857 . - Covers HF thru UHF, Auto Self-Tuning, motorized Transceiver Mobile Antenna ( 40 Meters through 450Mhz) - Designed for mobile (automotive) use, and Requires an Optional Suitable mobile antenna Mount & coaxial Cable. - Has PL-259 ( "PO" , "M" ) style base thread. overall length approx 5ft max extended. - Motorized "trombone" section Auto lengthens/shortens to tune antenna, when Yaesu radio's tune button is pressed. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B004UM9UL4 | | AntennaDescription | Radio | | Best Sellers Rank | #1,157 in Radio Antennas | | Brand | YAESU | | Color | Black | | Customer Reviews | 4.4 4.4 out of 5 stars (85) | | Impedance | 120 ohm | | Item Weight | 0.27 g | | Manufacturer | Yaesu | | Maximum Range | 40 meters | | Mfr Part Number | ATAS-120A | | Model Number | ATAS-120A | | Number of Channels | 7 | | Number of Items | 1 | | Number of Packs | 1 | | UPC | 788026098729 | | Unit Count | 1 Count | ## Product Details - **Antenna:** Radio - **Brand:** YAESU - **Color:** Black - **Impedance:** 120 ohm - **Manufacturer:** Yaesu - **Maximum Range:** 40 meters - **Number of Channels:** 7 - **Number of Packs:** 1 - **UPC:** 788026098729 - **Unit Count:** 1 Count ## Images ![ATAS-120A 40 Meter through 70cm Auto Tune Motorized HF/VHF/UHF Antenna For FT-857D, FT-450DandFT-897D ATAS-120 - Image 1](https://m.media-amazon.com/images/I/419-87BumiL.jpg) ## Questions & Answers **Q: What's the gain of this antenna?** A: As far as I know the manufacturer has not published any gain figures. One does not get this kind of antenna to achieve gain. Its purpose is to provide a good signal in a compact package for mobile use. Also, its automatic tuning function only works with certain Yeasu products (e.g. the FT857). The ATAS 120A might theoretically have a slight dBi or even dBd gain on UHF and VHF depending on the quality of the counterpoise (grounding). However on HF amateur bands (7/14/21/28/50 mhz) it should have negative (less) gain compared to a halfwave dipole as it is essentially a compromise vertical that is shorter than 5/8ths or a quarterwave, with loading coils to compensate for the lack of electrical length. However with a good counterpoise (groundplane provided by bonding connections to the vehicle) reports indicate that it gives excellent mobile results (compared to other mobile verticals) when used in a vehicle. **Q: I'm reading that the radio tunes the antenna. I'm about to buy the 857d BUT!! do you need to but the antenna tuner made by yaesu for this To work** A: Most of the below answers are confusing. FT857D DOES NOT have a built in tuner. If you have a good resonant antenna no tuner is needed. There are some antennas that can tune themselves via various methods and resonance is obtained at the antenna not the radio. Almost any antenna tuner at the radio can tune many non-resonant antennas. Yaesu specifically makes a tuner that attaches to the outside of the radio but almost any automatic (I recommend) tuner will work. Ground your radio and have a good counterpoise for your antenna. Most of my antennas are resonant at frequency (most efficient) but an auto tuner is wonderful for mobile HF operation especially at the lower frequencies (ie. 160-80M) and you keep your eye on the road. JUst remember to initially tune at 5-20 watts. The yaesu antenna is not an efficient antenna but it is convenient. N8LB **Q: Will the atas-120a tune 80 meters** A: No, only down to 40 meter band. Google ATAS-120a to get the one-page operating guide in pdf format. It includes the operating range in the specs section. **Q: Tough question: I intend to use this antenna as base station on my 5th floor condo HOA (inside of window) will the inside house ground be sufficient ?** A: As a DC ground, yes it will work. You may want to add the ATBK-100 radial kit to improve the ground plane or add homemade radials to expand the ground plane. Hope this helps - 73s de KC5AJS ## Frequently Bought Together - Yaesu ATAS-120A 40 Meter through 70cm Auto Tune Motorized HF/VHF/UHF Antenna For FT-857D, FT-450DandFT-897D ATAS-120 - GRA-ULT01 MK3 Lightweight Portable Antenna Mast Mount Tripod Tower UHF SO239 + 3/8" - 24 + 1/4 Camera Connector for GRA-7350T CB HF Ham Radio Amateur Outdoor 3/8x24 | GABIL - ATBK-100 ATBK100 Original Yaesu Antenna Base Kit for The ATAS-100 and ATAS-120A Antennas --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tw/products/6742395-atas-120a-40-meter-through-70cm-auto-tune-motorized-hf](https://www.desertcart.tw/products/6742395-atas-120a-40-meter-through-70cm-auto-tune-motorized-hf) --- *Product available on Desertcart Taiwan* *Store origin: TW* *Last updated: 2026-09-12*