![]() S RF means either "select frequency" or "split frequency". ![]() 5 1), indicates good efficient transfer but you should probably increase/decrease your antenna length or height until it matches up with an SWR of 1:1. This is why they have an "SWR CAL" on most radios because improperly tuning your radio won't allow you to achieve maximum power output.Ī reading above 1:1 (normally 3 - 4) indicates poor transmission due to high amounts of reflected power which can damage both your radio and antenna. Your CB radio will perform best when tuned properly - if your radio underperforms or sounds distorted on-the-air, chances are you have an improper SWR meter setup.Īlways tune your CB before using it, and if you are trying to install a new antenna onto your vehicle - tune the CB before taking it out on-the-air so you know it's doing its job properly! If you have SWR readings of 1:5, your CB radio is going to be putting out less than half of its full capacity - setting it up with the antenna at the right height and length may not push this value down enough to give you maximum power output if your radio just can't put out that much, but at least you'll know that even though it's set for max power, some of it isn't getting through so you should reduce input volume on your radio accordingly. If you want maximum output from your CB radio, you should try to achieve as close as possible a 1:1 ratio on-the-air. How Does This Relate To My CB Radio Power Output? Keep in mind that exact SWR readings aren't always necessary - as long as your radio is pushing enough power to reach the intended receiver, you are good-to-go! 5 - 1), indicates good efficient transfer but you should probably increase/decrease your antenna length or height until it matches up with an SWR of 1:1. This is why they have a "SWR CAL" on most CB radios, because improperly tuning your radio won't allow you to achieve maximum power output.Īn SWR reading of 1:1 means that ALL of your power being sent from the radio is being delivered to the antenna.Ī reading above 1:1 (normally 3 - 4) indicates poor transmission due to high amounts of reflected power which can damage both your radio and antenna.Ī reading below 1:1 (normally. On CB radios, it's mostly used to set the power out of your radio - whether you have a 50w, 35w or 25w radio, knowing what type of SWR you are transmitting at will tell you if your radio is pushing out the proper output power. This measures how efficiently the radio is being conducted through your coax with the antenna.
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