XRDS -RF CB Coax Cable 200FT KMR400 PL-259 - Low Loss Outdoor Cable

In this review the XRDS -RF 200ft KMR400 CB coax cable is assessed for amateur radio and marine use; its single biggest selling point is consistent, low-loss signal retention over long runs. The reviewer finds the larger 0.41 in copper clad aluminium center conductor and KMR400 construction deliver noticeably lower loss than typical RG58 or 240 type coax, making this cable a solid choice for users who need long runs for CB, ham, VHF or AIS installations and who value durability in outdoor conditions.

Key Features

• Ultra-low loss conductor: The 0.41 in copper clad aluminium inner conductor helps maintain signal strength over long 200 ft runs compared with smaller coax types.
• Durable jacket: The flexible UV-proof RF-PVC jacket is designed for extended outdoor exposure, which reduces weather-related degradation.
• PL-259 clamp connector: Uses a mount clamp UHF connector that is more secure than simple crimp fittings, improving mechanical reliability at the radio end.
• Nickel-plated waterproof connectors: New nickel plating and RF Industries style construction provide a better sealed, corrosion-resistant connection for marine or coastal installs.
• Adhesive-lined heat shrink: Extended black heat shrink with adhesive lining seals the PL-259 to the cable for improved weatherproofing of the assembled end.
• Wide compatibility: Suitable for CB radio, ham radio, SWR meters, VHF and HF setups, and many antenna accessories used by hobbyists and professionals.

Who It's For

This cable is aimed at ham radio operators, CB users, marine radio installers and anyone needing a long, low-loss 50 ohm run between a transceiver and antenna or analyzer. It is especially useful where a more robust center conductor and better weatherproofing are priorities for preserving signal and preventing corrosion.

Those who need extreme flexibility for tight indoor routing or very short jumper runs may prefer thinner, more pliable coax; likewise, if you require factory-crimped connectors or a pre-terminated coax with different connector types, look elsewhere.

Pros & Cons

Pros

• Low loss over long distances thanks to the larger 0.41 in conductor, preserving signal for VHF/UHF use.
• Robust UV-proof jacket and adhesive-lined heat shrink improve outdoor longevity in harsh environments.
• Secure PL-259 clamp connector and nickel plating give a dependable, corrosion-resistant connection for marine and coastal use.
• Wide application compatibility across CB, ham, VHF and HF accessories.

Cons

• Some users report varying stiffness; the thicker KMR400 construction can feel less flexible for tight installs.
• Bulk and weight of 200 ft of KMR400 may be overkill for short indoor runs where thinner coax would be easier to manage.

Specifications

Length	200 ft
Characteristic impedance	50 ohm
Center conductor	Copper clad aluminium, 0.41 in diameter
Connector type	PL-259 UHF male clamp mount
Jacket	Flexible UV-proof RF-PVC, outdoor rated
Sealing	Adhesive-lined heat shrink tube on connectors

Our Verdict

The XRDS -RF 200 ft KMR400 PL-259 coax is a practical choice for radio operators who need a long, low-loss 50 ohm run with strong weather resistance. It offers good value for outdoor and marine installs where a sturdier conductor and sealed connectors reduce loss and corrosion risk; professionals and hobbyists who prioritize flexibility over durability should consider alternatives.

Frequently Asked Questions

Is this cable suitable for marine use?
Yes; the UV-proof RF-PVC jacket, nickel-plated UHF connectors and adhesive-lined heat shrink are intended to resist corrosion and weather exposure in marine environments.

Will this reduce signal loss compared with RG58?
Yes; the larger 0.41 in copper clad aluminium conductor and KMR400 construction provide lower loss than typical RG58 or 240 type coax over long runs.

Are the connectors permanently attached?
The cable uses PL-259 clamp mount connectors with adhesive-lined heat shrink for a sealed assembly, rather than simple crimp-on push-fit connectors.