Police Car Scanners are invaluable tools for enthusiasts and professionals alike, offering a window into public safety communications. A crucial component of any scanner setup is the antenna. Often, users acquiring vehicles previously used by law enforcement, like the one shown with a roof-mounted antenna, encounter common antenna issues. Let’s delve into diagnosing and resolving these problems to ensure optimal scanner performance.
One frequent issue with ex-police vehicle antennas, particularly roof-mounted NMO (Motorola-style) antennas, is corrosion. These mounts, while robust, are prone to water ingress over time. Water seeps beneath the mount, leading to corrosion that can severely degrade signal reception. If you have a similar antenna, it’s advisable to gently attempt to unscrew the antenna element from the base using a wrench. This will allow you to inspect the underlying mount for signs of corrosion. In older vehicles, especially those lacking regular maintenance, corrosion is a highly probable culprit behind poor scanner performance.
Another common problem, as observed, is cut coaxial cables. Law enforcement agencies often disconnect or sever antenna cables before auctioning off vehicles. While cutting the cables is a preventative measure by the previous owners, it presents a challenge for scanner users. Repairing coaxial cables is possible, but it requires precision and quality connectors to avoid signal loss. For cables running to the trunk, replacement is usually straightforward. However, replacing a roof-mounted antenna cable is significantly more complex, often requiring partial disassembly of the vehicle’s interior, including headliners and potentially partitions if present.
Considering the potential corrosion issues with older NMO mounts and the labor-intensive nature of replacing roof cables, sometimes the most practical solution is to replace the entire roof mount assembly. While it might seem daunting, replacing an NMO mount, although requiring some technical aptitude and specialized tools, can be a definitive fix. If you’re comfortable with DIY car projects and possess basic tools, you might be able to undertake this task yourself with guidance. However, for those less experienced or lacking confidence, seeking assistance from a professional radio shop (distinct from car stereo installers) is highly recommended. A reputable radio shop possesses the expertise and tools to efficiently replace the mount and ensure proper sealing, preventing future water damage. Opting for a new antenna mount and antenna simultaneously is a wise approach, guaranteeing optimal performance and compatibility.
If dealing with roof-mounted antennas and cable replacements seems too involved, magnetic mount antennas offer a convenient alternative, especially for other vehicles. When choosing a magnetic mount antenna for your police car scanner, ensure the connector type matches your scanner. Reputable brands like Laird, Larsen, and PC Tel are known for their quality and reliable connector installations. It’s generally advisable to avoid brands like Tram/Browning, as their connector quality can be inconsistent, potentially leading to frustration and signal issues down the line. Investing in a quality magnetic mount antenna from a trusted brand ensures robust performance and longevity for your police car scanner setup.
