MOOKEERF KMR400 50ft Low-Loss 50Ω Coaxial Cable

MOOKEERF KMR400 50ft is a 50‑ohm low‑loss coaxial cable engineered for long runs and high‑frequency RF use, delivering under 1.8 dB loss at 900 MHz with durable weatherproof construction.

This 50‑foot KMR400 cable is designed for reliable signal transfer between antennas, radios, signal boosters and test equipment. Built with a copper‑clad aluminum center conductor and a combined aluminum‑foil plus aluminum‑magnesium braided shield, the cable minimizes signal degradation across longer distances while the PVC jacket resists outdoor exposure. It follows the KMR400/LMR400 form factor for 50 Ω systems and pairs with common RF connectors.

How much signal loss should I expect on a 50 ft run?

At 900 MHz the MOOKEERF KMR400 50ft cable exhibits very low insertion loss — under 1.8 dB — which keeps most of your transmitted or received energy intact over the run. The cable’s standing wave ratio (SWR) is specified at ≤1.15, indicating good impedance matching for 50 Ω systems and reduced reflected power.

• Typical loss: <1.8 dB at 900 MHz
• SWR: ≤1.15 for minimal reflections
• Optimized for VHF/UHF and common cellular bands

What is the cable construction and why does it matter?

The center conductor is copper‑clad aluminum (CCA), offering a balance of conductivity and lower weight. Around that is an aluminum foil layer plus an aluminum‑magnesium braided outer conductor, which boosts shielding effectiveness and preserves signal integrity across the length.

• Inner conductor: copper‑clad aluminum for conduction and lightweight runs
• Dual shielding: foil plus aluminum‑magnesium braid reduces interference
• PVC jacket: weatherproof for indoor or outdoor installations

Which devices and connectors pair with this KMR400 cable?

MOOKEERF KMR400 is a 50 Ω cable compatible with most RF systems that require that impedance. It’s suitable for cell signal boosters, Wi‑Fi repeaters, ham radio rigs, CB setups, antenna analyzers and professional antenna installations when used with matching connectors.

• Works with 50 Ω equipment: amplifiers, antennas, analyzers
• Connector compatibility: UHF, SMA, BNC, TNC, N, TS9 when properly terminated
• Note: cable often shipped without a wooden spool shown in photos

How durable is the cable for outdoor or rooftop use?

The outer PVC jacket is formulated to resist weathering and sunlight, making the cable suitable for exposed runs on masts and walls. While robust, correct installation practices — strain relief, proper clamps and weatherproofed connectors — will extend life and performance in harsh environments.

• Weatherproof PVC jacket for outdoor exposure
• Shielding resists EMI and reduces signal noise
• Recommended: secure mounting and sealed terminations for longevity

Who is this for? Installers, hobbyists and professionals who need a reliable 50‑foot low‑loss RF feedline will find the MOOKEERF KMR400 suited to antenna installations, signal boosters and test setups. If you require long runs with minimal attenuation across cellular and VHF/UHF bands, and use common 50 Ω connectors, this cable provides a practical, weather‑resistant solution. For special connector assemblies or custom lengths, pair the cable with quality terminations and proper installation to achieve the best results. MOOKEERF also offers customer support if the product does not meet expectations.