Mobile CB UHF Fibreglass Antenna Kits

Mobile CB UHF Fibreglass Antenna Kit - 950mm

$196.00

inc GST

Product Description

1. Mobile CB UHF Fibreglass Antenna Kit - 950mm

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.

SPECIFICATIONS

Length: 950mm

Gain: 4.5dBi

Description: Fiberglass Colinear UHF Antenna

Frequency: 474MHz ~ 479MHz

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

DO - Test for shorts or open circuit if possible with an multimeter or SWR with a SWR meter. When a DC grounded antenna is tested with a ohm meter, the reading is a short circuit or around 3 Ohms at the base - this seems strange but it is correct!.

It is important when testing the cable that the cable is not connected to the antenna or to the transceiver! If in doubt please call. Testing the antenna ensures all is in working order including the transceiver.

DO - Mount the antenna high as possible - Bull bar is often the best place for this style of antenna

DO - Use a spring if mounted on a bull bar. The spring is important to absorb the vibration from the engine, without the spring the antenna eventually may fall apart!

DO, DON'T - Earthing the antenna at its base, doesn't matter - It makes no difference to performance

DON'T - Mount the antenna along side any metal object - As far away as possible

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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2. Mobile CB UHF M474HD Fibreglass Heavy Duty Whip Antenna Kit - 590mm

The M1M474HDKIT is a 4.5dB Gain, Fibreglass, Wide Band, Co-Linear UHF antenna suitable for all UHF CB applications on a 5/16" screw type fitting.

The antenna is 590mm long by 7mm thick.

The M1M474HDKIT works best when mounted onto a bracket that is as close to the surface of the ground plane as possible such as a BMB mount (bonnet mount black). Z brackets are not recommended with this antenna.

PROS

More Broadband than Stainless Steel
Receives and Transmits 468MHz - 479MHz
No need to tune
No SWR meter needed
Australian Made

CONS

You can not use a spring with this antenna

CABLE AND BASE MOUNT

UHF Antenna Base + 4mtrs RG58CU coax cable + PL259 Connector and BNC Connector

SPECIFICATIONS

Antenna Length: 590mm

Cable Length - 4m

Base: UB4PL

Cable: 4m RG58CU Coax

Connector: FME on Cable - includes PL259 and BNC adapter

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3. Mobile CB UHF M475HD Fibreglass Heavy Duty Whip Antenna Kit - 860mm

The M1M475HDKIT is a longer 5dB High Gain, Fibreglass, Wide Band, Co-Linear UHF antenna suitable for all UHF CB applications on a 5/16" screw type fitting.

The antenna is 860mm long by 7mm thick.

The M1M475HDKIT works best when mounted onto a bracket that is as close to the surface of the ground plane as possible such as a BMB mount (bonnet mount black). Z brackets are not recommended with this antenna.

PROS