In vehicle UHF CB radios are almost a mandatory requirement when going off road driving in Australia. When travelling in a convoy they make communication you can rely on between vehicles a breeze no matter what environment you are in. That is provided each vehicle has either a handheld or in vehicle UHF radio on board and is tuned to the same channel or frequency. A vehicle mounted UHF CB radio has some advantages over a handheld, the main one being battery life is not an issue. You can talk and listen for hours. They are normally hard wired into a vehicle and installation can vary between dead easy to difficult. Their transmit power is greater than a lot of handhelds meaning the signal will travel further.
UHF Antenna's explained
Every in car UHF needs to have an an antenna that is mounted somewhere on the vehicle. UHF antenna's vary in length and material they are made from. High gain antennas (6 db) are tall and work best on flat terrain. Low gain antennas (3 db) are short and work best in hilly terrain. UHF is line of sight so the best transmission signal is achieved when you can see the other party you are talking to. When talking to other vehicles this can be quite a distance.
Anything in the way can impact the quality and range of the transmission. It is not as bad as you may think, for example, if you duck behind a building you can still communicate. The radio waves can travel through and bounce around objects. The more items in the way, the more limited the transmission.
The most common mount position for an antenna on a 4x4 is the top of the bullbar. The reason being is it is close to the in car UHF unit and there is nothing in the way of the antenna. The centre of the roof is actually the very best spot though not the most practical as it can be difficult to get to on a lot of large 4 wheel drives. Antenna mounts that attach to your mirrors is gaining popularity. Repeater stations are another good way to increase the range of your transmission. These are not available everywhere but handy to know they exist.
Repco have a great range of UHF & CB radios both in vehicle and handheld models. We stock some quality brand names including Oricom, Uniden and GME which is an Australian. This is complemented by our range of antenna's and accessories. We sell in vehicle units and antennas as a kit to get you started in UHF. Browse the In Car Tech category on the website to check product availability and price in stores. Keep a lookout for a sale so you can get your radio at a cheaper price. You can look up the store location of your local Repco and take advantage of click & collect on your purchased product. It may pay to shop in store if you need help and get the team to assist you making the right purchase.