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ATAS-120A 40 Meter through 70cm Auto Tune Motorized HF/VHF/UHF Antenna For FT-857D, FT-450DandFT-897D ATAS-120

Q: What's the gain of this antenna?

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

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

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 ?

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

ID del producto: 6742395

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Detalles

Antenna
Radio
Brand
YAESU
Color
Black
Number of Channels
7
Maximum Range
40 Meters
UPC
788026098729

⚡Auto Self-Tuning

📡Covers HF to UHF

🚗Designed for Mobile Use

Comprados juntos con frecuencia

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

Descripción

🚀 Tune In, Drive Out! Your mobile connection just got a major upgrade.

COMPACT DESIGN - Max extended length of 5ft, perfect for mobile setups without sacrificing performance.
MOBILE MASTERY - Engineered for automotive use, ensuring you stay connected on the go.
EFFORTLESS TUNING - Motorized trombone section auto-adjusts for optimal performance at the push of a button.
VERSATILE COMPATIBILITY - Compatible with a wide range of Yaesu models for ultimate flexibility.
SEAMLESS FREQUENCY COVERAGE - Experience uninterrupted communication from 40 meters to 450 MHz.

The Yaesu ATAS-120A is a motorized HF/VHF/UHF antenna designed for seamless communication across a wide frequency range. Compatible with various Yaesu amateur radio models, it features auto self-tuning capabilities and is specifically engineered for mobile use, making it the perfect companion for on-the-go operators.

¿Tienes una pregunta? Mira lo que otros preguntaron

What's the gain of this antenna?

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

Will the atas-120a tune 80 meters

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 ?

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Trustscore 4.5 | Más de 7,300 reseñas