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Cobra HG A1000

18-1/2" magnetic-mount CB antenna

Item # 079HGA1000

This compact antenna attaches securely to your vehicle's trunk or rooftop to give you the range you need.

This compact antenna attaches securely to your vehicle's trunk or rooftop to give you the range you need.

Item # 079HGA1000

Ships today

In stock

About the Cobra HG A1000

Big reception from a compact antenna

When it comes to CB reception, great things can come in small packages. This compact 18-1/2" magnetic mount antenna from Cobra attaches securely to your vehicle's trunk or rooftop to give you the range you need when you're on the road. It can be easily transferred from vehicle to vehicle, too, so it's a great choice for serious road warriors.

Product highlights:

  • magnetic-mount CB antenna
  • attaches securely to your vehicle's trunk or roof
  • supports NOAA weather channel reception
  • easily transferred from vehicle to vehicle
  • black stainless steel whip and hardware
  • heavy-duty braided 15' coaxial cable included
  • frequency range: 26-30 MHz
  • warranty: 1 year
  • Our 60-day money-back guarantee
  • MFR # HG A1000

What's in the box:

  • CB antenna mast with screw-on collar
  • Magnetic antenna base with attached 15.75' RG58 coaxial cable (UHF male connector)
  • Rubber base pad
  • 2mm Allen wrench

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More details on the Cobra HG A1000

Research Team

Product Research


Overview: The Cobra HG A1000 is a "cellular-style" CB antenna with a magnetic mount that easily attaches to the roof or trunk lid of your vehicle. It has an 18-1/2" mast and 2-3/4" diameter magnetic base, plus an attached 15'-9" braided coaxial cable (RG58) with a male UHF threaded connector. The Highgear-series antenna is designed for all CB and 10-meter radios, and is weather channel ready. It is covered by a 2-year manufacturer's warranty.

Construction: The HG-A1000 features a non-corrosive black chrome stainless steel whip that resembles a cellular antenna, with non-corrosive black chrome-plated brass components. The heavy duty magnetic base holds the antenna securely to your vehicle. A rubber base pad on the bottom of the magnet prevents scratches to your vehicle. The antenna is tunable should the SWR (Standing Wave Ratio) be out of acceptable range.

Tuning The Antenna: The metal body of your vehicle serves as the ground plane for the antenna. After mounting the antenna in your vehicle, you should test the SWR in an open area, using a SWR meter, or CB radio if it has a built-in SWR meter. The test should be run on channels 1 and 40. Readings of 2:1 are considered acceptable, while ratios of 1.5:1 or lower are desirable. If the SWR reading on channel 40 is higher than channel 1, you will need to trim the mast by 1/8"-1/4" using a bolt cutter or hacksaw, then retest. The whip is removable from the mast using the supplied 2mm set screw.


  • Power Handling: up to 100 watts
  • Frequency Range: 26-30 MHz
  • Dimensions:
  • Base Diameter: 2.727"
  • Overall Height: 18.5"
    • Base Height: 1.51"
    • Whip Length: 17"
  • Cable Length: 15'-9"
  • Weight: 15.5 ounces

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