XRDS -RF KMR400 50ft UHF Coax Cable PL-259

XRDS-RF KMR400 50ft PL-259 UHF coax jumper is a professional-grade, low-loss 50-ohm cable built for HAM, CB, antenna analyzers and outdoor use.

This 50-foot KMR400 coax with PL-259 UHF male connectors delivers a reliable, low-attenuation RF path for radios, SWR meters, antenna analyzers and dummy loads. Engineered by XRDS-RF — a manufacturer with over two decades in radio coax production — this jumper is swept on network analyzers to keep VSWR low and maintain signal integrity across VHF, UHF and higher frequencies. Its high-density tinned-copper braid, full shielding and nickel-plated waterproof connectors are designed to withstand outdoor installation and repeated field use.

How does this cable reduce signal loss compared with common alternatives?

The KMR400 construction prioritizes low attenuation: a copper-clad aluminum center conductor, high-density tinned-copper braid and full 100% shielding produce measurable improvements versus lighter RG-58-type cables. XRDS-RF reports very low loss figures (for example, a 3 ft sample shows around 0.26 dB attenuation at 500 MHz), which translates to better matching and more efficient power transfer at typical ham, CB and analyzer frequencies.

• 50-ohm impedance optimized for transceivers and test gear
• 100% shield with high-density braid for improved noise rejection
• Lower loss than RG-58 at UHF and Wi-Fi-range frequencies
• Network-analyzer swept to verify VSWR performance

Are the PL-259 connectors durable enough for outdoor and frequent use?

Yes — this jumper uses nickel-plated RF Industries-style UHF male (PL-259) connectors assembled with a heavy mount clamp rather than a fragile crimp-only joint. The connectors are sealed with adhesive-lined heat shrink to protect the junction from moisture and mechanical stress, improving longevity in outdoor or mobile installations.

• Nickel-plated UHF PL-259 for corrosion resistance and secure mating
• Heavy mount clamp attachment reduces risk of pull-off or loosening
• Adhesive-lined heat-shrink tube up to 2.2 inches for sealed ends
• UV-proof RF-PVC jacket rated for long-term outdoor exposure

What environments and setups is this 50ft cable suited for?

The 50-foot length gives flexibility for station setups, antenna runs and temporary field deployments. With a UV-resistant jacket and weatherproofed connectors, the KMR400 jumper is appropriate for rooftop, mast-to-radio runs, mobile installations and bench test connections between transceivers and analyzers.

• Use between radio and antenna, or radio and SWR/antenna analyzer
• Outdoor rooftop or mast cabling thanks to UV-proof jacket
• Mobile and field use where dependable connectors matter
• Test and measurement links for dummy loads or SWR meters

How does XRDS-RF ensure quality and consistent performance?

XRDS-RF applies industry-standard sweep testing and builds cables with quality materials to guarantee repeatable RF characteristics. The cable's braid density, conductor choice and connector assembly methods are controlled to keep VSWR low and maintain expected attenuation across the operating band.

• Products swept on network analyzers for VSWR verification
• Professional assembly using mount-clamp connectors, not crimp-only
• High-density tinned-copper braid and full shielding for consistency
• Durable jackets and sealed connections for long field life

Who is this for: The XRDS-RF KMR400 50ft PL-259 UHF coax jumper is aimed at amateur radio operators, CB users, field technicians and anyone needing a robust, low-loss 50-ohm link for transceivers, SWR meters, antenna analyzers or dummy loads. Choose this cable when you need improved performance over cheap RG-58 alternatives, secure connector attachment and weatherproofed ends for outdoor or mobile installations.