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Comet

Comet CA-2X4SRNMO Dual Band Mobile Antenna 144/440 MHz – High Gain VHF UHF NMO Mount Antenna for Ham Radio, GMRS, and Vehicle Use – Compatible with Icom, Yaesu, Kenwood, and Other Mobile Radios

  • Based on 114 reviews
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Availability: In Stock.
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Arrives Thursday, Aug 6
Order within 4 hours and 49 minutes
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Features

  • Wideband dual band performance enables operation across the full 2M and 70cm amateur bands with extended coverage for VHF and UHF public safety, commercial, and scanner use Designed for users who need more than standard ham band operation, the CA-2X4SRNMO covers a broad frequency range with optimized tuning to support amateur radio, commercial frequencies, and general scanning applications.
  • High-gain mobile antenna design provides strong transmit and receive performance for communication in urban, rural, and obstructed areas Its efficient radiating structure enhances both outbound and inbound signal strength, making it ideal for mobile operators who require reliable communication over varying terrain or long-distance repeater paths.
  • NMO connector base ensures compatibility with the most widely used mobile mounting systems, allowing easy integration with magnet mounts, trunk mounts, fender mounts, and permanent NMO installations The universal NMO standard provides a secure, weather-resistant connection and makes upgrading from other NMO antennas simple without needing to replace the mount.
  • Flexible and durable whip construction resists wind, vehicle movement, low-clearance conditions, and vibration during travel The CA-2X4SRNMOs flexibility greatly reduces the risk of bending or damage during everyday driving, offering long-term reliability for commercial fleets, emergency responders, and amateur radio users.
  • Flexible and durable whip construction resists wind, vehicle movement, low-clearance conditions, and vibration during travel The CA-2X4SRNMOs flexibility greatly reduces the risk of bending or damage during everyday driving, offering long-term reliability for commercial fleets, emergency responders, and amateur radio users.

Description

Operates on 144 MHz (VHF) and 440 MHz (UHF) for reliable two-way communication. Ideal for ham radio, GMRS, and mobile setups. Features a high-gain whip antenna with NMO magnetic mount for easy installation on vehicles, offering superior reception and transmission. Works with Icom, Yaesu, Kenwood, and other mobile radios that support NMO mount antennas. Compatible across popular VHF/UHF devices. Built to withstand all weather conditions, with rugged materials designed for long-term mobile use. Perfect for ham radio enthusiasts on the move.

Antenna: Dual Band Mobile Antenna


Brand: Comet


Color: Black


Impedance: 50 ohm


Maximum Range: 210 feet


Product Dimensions: 38"L x 2.8"W x 1.2"H


Manufacturer: Comet


Number of Packs: 1


Unit Count: 1 Count


AntennaDescription: Dual Band Mobile Antenna


Brand: Comet


Manufacturer: Comet


Unit Count: 1 Count


Item Weight: 0.27 g


Model Number: CA-2X4SRNMO


Mfr Part Number: CA-2X4SRNMO


Warranty Description: 1 YEAR


Impedance: 50 ohm


Maximum Range: 210 feet


Color: Black


Item Dimensions L x W x H: 38"L x 2.8"W x 1.2"H


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Aug 6

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Fantastic broad band antenna: Covers Amateur 2m/70cm, Marine VHF, MURS, GMRS
I bought this antenna primarily to use on my boat where I wanted to shared an antenna feed with both a GMRS radio, and a Marine VHF radio using a frequency-split diplexer. In that application it works great. Signal strength is very good, SWR at those frequencies is very good (<1.3:1) and installation was exactly how I expected. But then I discovered that this is also just a great all around antenna for 2m, 70cm, MURS, GMRS, Marine VHF, and in scanning (receive only) applications from 25MHz to 1.3GHz. I have one hooked up to my RTL-SDR, for example, so I can scan any service within its bandwidth range. The fold-down is rather stiff. I don't use this in offroad conditions currently, so I don't need a spring. But a spring kit is available if you need it to be better protected offroad. It's a rather long antenna due to its compatibility with 2m VHF. But it's a good all around antenna, very effective at the ranges I've tested. Recently I used it to hit a GMRS repeater 64 miles away with a 4w handheld. ... show more
Reviewed in the United States on July 29, 2024 by davido
    • Great Antenna
Awesome antenna. Using a mag mount for inside use. Hits a lot of the repeaters in my area.
Reviewed in the United States on April 30, 2026 by RiverThamesTraveler
    • Great wideband mobile antenna
This is a really good mobile antenna suitable for HAM as well as GMRS/FRS communications. It has a pretty widebanded operation and has held up well over the years. I own 5 of these antennas and they are my favorite, go to mobile antenna. I have only every used this antenna with a mag mount and it works just fine. Good purchase! ... show more
Reviewed in the United States on January 5, 2026 by Aviator007
    • New ears
Great antenna
Reviewed in the United States on May 28, 2026 by Troy Tripamer
    • Comet Dual Band Antenna
Works good, swr around less than 1.0 . Tall enough to go over the cab for a good signal . Spendy when you add the spring whip but I think you need it.
Reviewed in the United States on March 4, 2026 by Kevin B
    • Made a big improvement on RX/TX
It works great, made a huge difference in RX and TX. I have both Amature radio and GMRS radios, improved both. I also have it fitted to a Btech Nagoya GPK-01 (21" Radials) NMO Mount Ground Plane Kit. I am easily hitting repeaters 200 miles away with it mounted on a 30 ft pole, I am 6000 ft ASL.
Reviewed in the United States on December 9, 2025 by Scott
    • Well-constructed and works well, but...
...it came without a parts list specs--Comet's website doesn't function well so it's not downloadable from there. I would've upped my rating if the spec sheet came with the antenna.
Reviewed in the United States on February 22, 2026 by A 21st Century Man
    • Great Tri-Band Antenna
Review Image by David Wernsman
Review Image by David Wernsman
I purchased this antenna for my mobile rig. I’m have less than 1.5 SWR across VHF, UHF, and GMRS. In my local area, I regularly hit repeaters 25-30 miles away off of my Yaesu FTM-510DR. The 2x4SR stands up to highway+ speeds extremely well. This antenna works so well, I even purchased one for my father. Overall, I am extremely happy I purchased this antenna. If anything were to happen to mine, I would buy a replacement without question. ... show more
Reviewed in the United States on September 24, 2025 by David Wernsman

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