This article provides guidance on selecting and mounting UHF antennas for 4WD vehicles, particularly when used in challenging off-road conditions. It addresses issues of antenna breakage due to vibration and impact, and offers advice on choosing robust antennas and appropriate mounting locations.
Problem
UHF antennas, especially those mounted on bull bars, are prone to breakage due to vibration (particularly in diesel vehicles) and impacts from branches on corrugated roads. Certain antenna designs are more susceptible than others.
Solution
Consider the following factors when selecting and installing a UHF antenna:
- Antenna Type:
- Fiberglass whips: Generally more durable than solid wire antennas, especially in high-vibration environments.
- Short, Ground-Independent Antennas: Models like the RFI CD51 series are robust and less prone to breakage due to their smaller size and construction.
- Spring Mounts: Use a medium or heavy-duty spring mount to absorb vibration and impacts.
- Mounting Location:
- Roof Rail Mount: Offers good height and can be less susceptible to impacts.
- Rear Door Frame Mount: A suitable alternative for avoiding bull bar vibrations.
- Diesel Considerations: Diesel engines produce more vibration which can fatigue certain antennas. A fiberglass whip antenna on a medium or heavy-duty spring may best suit 4WD diesel engine vehicles and outback travelling.
- Spare Whips: Carry spare whips.
Relevant Parts
- Antennas:
- Bushcomm Stinger
- SCG Scalar
- GME AE4706
- GME 4702
- RFI CD51 Series (e.g., CD51-68-50, CD51-68-73, CD51-68-70)
- RFI CDQ5000W (for replacement of CD900)
- RFI CD900 (prone to breakage on bull bars according to some users)
- Spring Mounts:
- Medium-Duty Spring Mount
- Heavy-Duty Spring Mount
This technical summary was auto-generated based on recovered archives. Do not rely on its factual accuracy. Refer to the original thread. Source: View Original Conversation
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