- The CL474S is one of the most popular UHF CB antennas as it has great gain and short length.
- The CL474S is a fiberglass collinear antenna with 3.6m coax & supplied with a pl259 connector.
- It is available in white or black and has a shock absorbing spring with a 1/2" UNF stud that can be mounted almost anywhere on a vehicle.
- It does not need to be earthed and can also be used as a mini base antenna.
Most high gain - Collinear Antennas are DC Grounded and do not need tuning
DC Grounded means the antenna has what is known as a LC Network, Tuning stub or similar method for matching the antenna in order for it to work on the frequency required, what this means is that if you were to measure the connection at the base of the antenna with a ohm meter it would read a DC dead short (DC Grounded) - This is normal and is a common way of designing antennas. DC Grounded antennas do not need a ground plane or earth as in the case of monopole antennas;
Do's & Don't with DC Grounded Antennas
Any metal object will absorb the radiation from the antenna, greatly reducing its performance, you need at least 700mm from a wall or from another antenna for 477MHz antennas, if this is not possible then mount the antenna as far away from any other antenna or metal object as possible.
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