how to tune cb antenna without swr meter

How to Tune CB Antenna Without SWR Meter – Step-by-Step Guide, FAQs, Tips & More

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Tuning a CB antenna without an SWR meter seems more challenging than it sounds. 

Most people in our team used to tune CB radios back in the day when built-in SWR meters weren’t as commonplace. 

In this post, we’ll provide step-by-step instructions on how to tune a CB antenna without an SWR meter. 

Quick Summary

In this post, we will discuss 

  • What you’ll need to tune a CB antenna without an SWR meter 
  • How to tune a CB antenna without an SWR meter 
  • Some frequently asked questions (FAQs) 

So without further ado, let’s get into it.

Items Needed to Tune a CB Antenna Without an SWR Meter

It’s extremely important that you get all of the necessary items gathered before you actually start attempting to tune your CB antenna. 

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You don’t want to be running around grabbing things from your garage. Furthermore, you’ll need to go out to an open area to properly tune a CB antenna. Hence, if you don’t bring all of the essentials with you, then you’ll have to go back to get them. 

The items you’ll need to tune a CB antenna without an SWR meter are: 

  • An additional CB radio: You might wonder why a second CB radio is needed. Well, it will be utilized as a benchmark or a control. We will use it to compare the two transit power signal outputs. 
  • A short coax cable: Make sure to buy a high-quality coax cable so that you don’t run into any issues during tuning. 
  • An open space: Any open area that’s at least 40 feet wide will work. You need the open space to properly test out your CB radio’s output. 
  • A microphone: You’ll use the microphone to test the transmission power of your CB radio. 
  • A helper: You can’t do this on your own. Hence, you’ll need to find a friend, family member, or colleague that’d be willing to help you with the process. 

Once you have everything gathered, go out to your open space with the equipment to get started with tuning your CB antenna without an SWR meter.

How to Tune a CB Antenna Without an SWR Meter (Step-by-Step Guide) 

If you want to tune a CB antenna without an SWR meter effectively, follow these steps: 

Step 1: Find and Ready the Open Space

For an open space to be effective for the tuning process, it needs to be at least 40 feet from side to side. 

Try to find an open field or a space where there are little to no structures that may block the radio waves. By “structures”, we mean things like buildings, cars, tall trees, containers, etc. Anything that can make the radio waves reflect off of them is a big no-no. 

While larger trees can definitely pose an issue, smaller bushes aren’t really anything to worry about. 

You’ll most likely find the best space in the countryside rather than in the city. 

Smaller rocks and other forms of shrubbery are also nothing to worry about. However, bigger boulders can still interfere with the signal. 

Humans can also interfere with the signal. Hence, make sure that the open space you’re using does not have too many people. 

Step 2: Inspect Your CB Antenna 

This is a practice that you should make a habit of in any case: Inspect your antenna properly before you begin to tune it. 

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Your antenna should be in good shape, straight, and properly usable. A fully usable CB antenna will have a plastic cap on its end. Make sure that you inspect the end and confirm that it does indeed have the plastic cap. 

If your CB antenna does not have a plastic cap, it will be untunable. 

In this case, you’ll have to either go out and buy a replacement plastic cap for the antenna or buy a new antenna altogether. 

Step 3: Turn on and Ready the Second CB Radio 

The best way to ensure that your CB antenna is tuned properly without the help of an SWR meter is to compare it to another CB radio and antenna pair. 

If you have other enthusiast friends, then it can be fairly easy to obtain a second CB radio. However, we understand that it may not be possible for many people to obtain it without actually buying a second one. 

If you don’t have any friends that can lend you a second CB radio, it can be a good idea to browse local social media groups. You may be able to find some like-minded enthusiasts that are willing to help you out. 

If you can’t get your hands on a second CB radio, then a phone can work as well. 

It can be relatively harder to set up a phone on the same channel but it’s definitely possible. 

At this stage, you’ll need to ask for help from your helper that you brought along on the trip. They’ll be in charge of setting up the second CB radio and testing its transmission. 

It’s best to have the two CB radios on the same channel in order to reduce the differences. 

Important note: Make sure that the second CB radio is set up a considerable distance away from your CB radio. 
It’s a good idea to have the two CB radios on opposite sides of the open space that you’re working with. 
If the two CB radios are too close to each other, then the signals will interfere with each other and the transmission will become noisy and garbled. 

Step 4: Connect the Two CB Radios

To test out your CB antenna’s transmission power, the next step is to connect the two CB radios. 

Make sure that they are on the same channel and once they get connected, you’ll start to hear some static coming from the second radio. 

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After you confirm that the two radios are connected, you can proceed to the tuning process. 

Step 5: Test the Tuning

Once the connection is established, go ahead and hook up the microphone to your untuned CB radio and start talking into it. 

Since your CB radio is not tuned properly, your helper most likely won’t hear a clear sound coming out of the second CB radio. 

You can now begin to adjust the antenna in order to tune it. 

The goal of your helper is to listen to the transmission and tell you whether or not it’s clear. 
Your goal is to listen to the feedback of your helper and keep adjusting the CB antenna until your transmission becomes clear. 

You can adjust the CB antenna in a number of ways to tune it depending on what type of antenna it is. 

Some CB antennas can only have their height adjusted. You can pull or push them to adjust their height as well as their angle. 

cb radio without correct height device adjusting interference connection length system range

Others feature a ring that you can turn in order to adjust them. Some antennas don’t have a ring but rather, they have a special cap that you need to turn in order to adjust their transmission properties. 

You also have whip antennas that utilize a steel whip to operate. They also have wires inside of them and are relatively complicated to operate.

Please note that all antennas come with instruction manuals and their own specific set of properties. 
Make sure that you read the instruction manual thoroughly so that you know exactly how to interact with the CB antenna to tune it properly. 
If you don’t even know how to move the antenna around and adjust it, then you’ll never be able to get a clear transmission.

Once you and your helper are satisfied with the transmission being received on the second CB radio, you’re good to go. A clear transmission means that your particular CB antenna is now properly tuned. That too, without the help of an SWR meter.

Frequently Asked Questions (FAQs) 

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Is it worth it to buy an SWR meter? 

It differs from person to person since buying an SWR meter simply for tuning has both pros and cons. 


  • It’s not too expensive.
  • You won’t need the help of a second person to tune your CB antenna if you have it.
  • It makes tuning much easier and quicker.


  • While they’re not too expensive, it’s still a purchase you have to make. 
  • If you can already tune the CB antenna without it, then there’s really no need for it. 
  • Some SWR meters might not work with certain antennas.

Should I get a CB radio with a built-in SWR meter? 

If you already don’t own a CB radio, then it’s a good idea to get one that comes with an SWR meter built into it. Naturally, this will make the tuning process much easier to perform. 

However, if you already have a CB radio that does not have an SWR meter, then it’s a much better investment to just buy a separate SWR meter.

What are some tips to adjust my CB antenna?

Here are some tips to tune your CB antenna effectively: 

  • Adjust small sections of the antenna and observe what types of differences your changes make in the transmission 
  • Make sure that your antenna is clean and free from any debris or dust. Also, ensure that it’s not damaged in any way. 
  • If your antenna has a ring for adjustment, make small turns rather than large ones. Observe what types of changes in the transmission occur when you make these small turns. 
  • If you intend to raise the height of your antenna, don’t raise it as high as it can go. Raise it up slowly and observe the changes in the transmission. Raise it until the transmission becomes as clear as possible. 

What are the different types of CB antennas?

The different types of CB antennas include 

  • Whip antennas: They perform the best and are readily available in most stores. The issue with them is that they are fairly large in size which makes them inconvenient to work with. 
  • Magnet-mounted: As you may infer from the name, these antennas can be mounted to your vehicle with the help of a magnet. They offer decent performance and are, of course, very easy to mount. 
  • No-ground plane: These types of antennas are ideal if you have a vehicle that does not have a metal body. They’re convenient to mount but don’t offer the best performance. 
  • Center-loaded: These types of antennas feature a plastic coil that runs through them. They offer quite high performance. 
  • Fiberglass: These types of antennas are super affordable and also, quite commonplace. They don’t have the best range but can get the job done for amateur enthusiasts.

If you’re interested in learning how to ground a CB antenna, we’ve got a complete step-by-step guide for you.

Why is my SWR reading so high? 

This usually happens when the antenna is mounted too low on your vehicle such as low on the bumper or on the trunk. 

In such cases, the radio signal reflects back to the antenna and this is what causes a high SWR. 

To prevent this, you can adjust the antenna to ensure that it has at least 12 inches of space above the roof of your vehicle. Your antenna should be the highest point on your vehicle. 

Wrapping Things Up… 

As you can see, it’s definitely possible to tune a CB antenna without the help of an SWR meter. 

CB radios have been around way before SWR meters started to become commonplace. If you have an older radio that doesn’t have an SWR meter, you now know how to tune it. However, we do recommend that if you’re buying a new one, get one that has a built-in SWR meter. 

How do you tune your CB antenna? Let us know in the comments section below. 

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