How to Test a VHF Antenna

Written by michael wallace
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A radio that runs on a VHF frequency commonly functions as a marine radio. That means you can mount its VHF antenna on a boat for broadcast signals while at sea. If you have just set up a VHF radio on your boat, there are quick ways to check the antenna and make sure it's functioning properly.

Skill level:
Moderate

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Instructions

  1. 1

    Turn on your VHF radio and make note of your frequency displayed on the radio transceiver. Give the frequency to a friend with a working VHF radio. Have the friend tune his radio to the same frequency as yours.

  2. 2

    Check with the friend to see if she is receiving your signal. If not, you may have a problem with your antenna. For more in-depth testing, proceed to the next step.

  3. 3

    Remove the antenna cable from your radio. Plug one end of the antenna cable into the output jack on the side of a VHF radio tester. These testers are small units with front displays that register the wattage output of a VHF antenna.

  4. 4

    Plug the antenna cable into the input jack on the opposite side of the tester. Make sure your radio is on and the antenna wattage will display on the tester.

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