There is a wide range of CB antennas available on the market, and each one has a different installation process. This guide is intended to highlight those steps that are common to the entire installation of the CB antenna. It will also explain factors that greatly affect the operation of your CB antenna.
1. Select a place
The first thing you need to consider when installing a CB antenna is to choose a suitable place for it. Before you get your antenna home, make sure that you have chosen a point. This will help you purchase the equipment you need to install. Here are some tips for doing the job right:
- Try the center of the roof of your vehicle as the first installation location of your CB antenna. This is an ideal place, as it gives your antenna maximum exposure and a wide ground plane for reference.
- Try not to mount the antenna on a bumper, number plate or fender, as these are the worst places to install. Here you will get half the signal strength than normal.
- Secure the antenna so that its coil is above the roof line of your car. Since the coil is the core of the antenna, and for better reception on your radio antenna, the coil should be covered with a solid material like a diamond, only this will make your antenna more efficient.
- Choose a sufficient antenna height that needs to be installed high enough on your car.
This process can vary in complexity depending on the type of antenna you have. If you have a magnetic mount, then the process can be as simple as simply attaching the holder to a selected location. On the other hand, mounting the door jamb may require technical support to drill the mount to the desired point. You can get an idea of your cb antenna type and antenna installation process from the manual that will accompany the product.
3. Run the cable
Setting the correct route for the connecting cable is the next important step. There is a coaxial cable that connects the CB antenna with your CB radio. Your task is to install it neatly and most unnoticed. The following are tips you can follow for this:
- Buy coaxial cable with removable PL259. This connector helps you easily route your cable through smaller openings.
- Try to choose the cable length that is fully used and nothing is left hanging down.
- Keep your line as quiet as possible by avoiding the use of alternators.
- Try not to cut the coaxial cable.
Once you have successfully completed your work with the cb radio station and the installation of the CB antenna, it is time to tune the system to the appropriate frequencies. This will make your KB more experienced and far-reaching and provide unhindered access to the maximum number of contacts from around the world through the CB system.
5. Why tune the antenna?
Tuning a CB antenna is the most important part of the installation of a CB antenna, which determines the future performance of your CB system. A properly tuned antenna is needed to improve the reception and transmission of your CB system, despite the constant 4 W output power allowed for every CB radio on the market. If this tuning process is faulty, you have a message full of noise and broken signals.
6. How to set up a CB antenna
- First, turn off the antenna and make sure that your coaxial cable comes out of the rear port.
- Now take your VSWR meter and connect the antenna coaxial cable to the port named “antenna”.
- Now take the jumper cable for the coaxial cable and connect it to the point from which you removed the coaxial cable from one end and to the transmitter position on the SWR meter from the other end.
- Clear the space around your car and close the windows and doors.
- Now turn on the radio station.
- Tune to channel 1.
- Adjust the SWR meter to the “FWD” point.
- Press the talk button to enter the microphone and adjust the knob by turning it until you find your SWR meter in the “set” position. Now don't let your microphone be pushed.
- Now bring the counter to the status of "reflection".
- Re-enter the microphone and note the readings shown on the instrument. If the readings are low, then all is well. But if he is somewhere in the red zone, check your tuning again, leaving the CB radio off.
- Now follow the same procedure for channel 40.
- If you get a reading on channel 1, which is higher than on channel 40, this means that your CB antenna is too short and its length should be increased. On the other hand, if the reading on channel 40 is higher than that shown on channel 1, slightly shorten the antenna.
- If the readings on channel 1 and channel 40 are 1.2 and 2.3, respectively, then cut your CB antenna to a shorter length. For this purpose, you can adjust the length using the tuning tip, or you can adjust it to 1 / 4inch and reinstall it. Be especially careful when trimming a CB antenna, since a slightly larger trim can destroy your antenna performance.
- If the readings are 2.6 and 1.3 on channels 1 and 40 respectively, then increase the length of your CB antenna. You can simply adjust the length with adjustable screws, or you can use a spring between the bracket and the whip.
- When setting up, follow the small steps. During this procedure, make sure that all the components of the antenna are in the right place and continue to check them after each setup that you make.
1. Location
During installation of the CB antenna, the position matters. We mean the area where you will tune your cb antenna. This place should be open ground most preferably, or should not be shouted at least. Also keep the car carefully packed with all the doors and windows closed properly.
2. Short
When installing a CB antenna, when the CB antenna is shorted to ground, you will get a very high VSWR level for your CB system. You can expect this short circuit to occur on the CB antenna bus or coaxial cable.
3. Coaxial
During the installation of the antenna, when the screen comes into contact with the conductor located in the center of the cable, it closes. This can occur for many reasons, two of which are a natural cable crack from the time of purchase or a manufacturing defect. To make sure your coax cable is working properly, first unplug it from the CB antenna and CB radio, and then test it with a multimeter. This meter will help you find out if there is any continuity between the center conductor and the screen. If there is no continuity between them, your coax cable works fine. Otherwise, you will need to get a new coaxial cable for your system.
4. Stud
When installing the antenna, if the nut and bolt of your antenna are in contact with the antenna mount, then there is a high probability that your antenna pin will be shorted. If you carefully put in the nylon washers, you can prevent it, but this requires special care. This type of contact actually completes the main purpose of the antenna research, i.e., to hold the antenna high above the ground with the distance between them. Now you can use a multimeter to check the health of the antenna pins connections. If you find a nut and bolt in contact with fasteners, read the nylon washer to take care of this.
5. Bad electrical grounding
This is different from the ground plane of which we all know. First, make sure that the antenna mount is properly grounded to the chassis of your car. If you have a number of metals, you can ground it by bringing it into contact with the metal surface of the car. For relief, take a multimeter and check if your place is good on earth or not. You can check this with a light or multimeter meter, just like you can check any vehicle. The easiest way to access this obstacle is to discard any paint from your car to expose the metal under it for better grounding. You can also use a grounding trap to ground your CB antenna. If you have a magnetic mount, then there should be no problems for grounding, since magnetic bases through capacitive coupling are fairly easy.
6. Coax Coaxial Cable
As a rule, when you have a very long coaxial cable, it is possible that it will be enough even after the installation and cabling is completed. This additional coaxial cable is often twisted or coiled like an antenna coil. If this happens, your system will experience feedback from the signal. To prevent this situation, choose a longer route to transmit the cable via CB radio.
7. Insufficient ground plane
We all know that a wide metal ground plane is required for an antenna as is mandatory for the ideal installation of a CB antenna. First select the ground plane with the widest metallic coating. If you are installing the antenna anywhere on the sides, hold the mount close to the main body of the car. For vehicles without a metal chassis, use No Ground Plane CB antennas.
8. Obstacles
Your CB antenna will work poorly if it is built around. This often happens when you place your CB antenna somewhere very low on a car, like on your bumper. This reflects the signals in the antenna, and you get a high level of VSWR. To solve this problem, hold the CB antenna located above the roof and give it maximum exposure by placing it at the highest point.
9. Broken antenna
As a rule, CB antennas have a fiberglass pole with copper wire wound inside. Any defect or crack in this wire can make your antenna useless and you will get very high VSWR levels. Check the continuity between the tip and the base of the antenna with a multimeter. You can use a multimeter probe for this purpose if there is no tunable tip. In this case, if you do not find any continuity between the antenna tip and the base, you need to replace the broken antenna. Also make sure that a capacitor is not connected to the system, which can mislead a multimeter.
10. Short or poor quality CB Coax
If you have tried all other solutions, and your problem is still not resolved, try replacing your coaxial cable with a longer and better one. Choose a cable from a good brand giving high quality.
11. CB antenna length
Most CB antenna manufacturers guarantee you pre-configured antennas, and you do not have to tune them again. It may be true, but it is not guaranteed that it suits your business. Even if you trust these claims, you will find that these pre-configured specifications will not work well with all installation situations. If after you try everything else, you still want something big to solve your problem, then think about changing the length of your antenna as one of the latest resorts. Sometimes it may be necessary to trim the antenna into 2 pieces. to achieve the required level of CWS, but this is a very rare case. Always be careful when changing the length of the CB antenna through cutting, as it can easily cut more than necessary. The safest way to do this is to cut off a tiny part of the antenna and measure the readings on the SWR meter. Do this side by side with each cut. This ensures that you do not exceed the level of the required CWS.
