LMR-400 Low Loss Coaxial Cable – Premium 50 Ohm RF Feed Line

The LMR-400 Low Loss Coaxial Cable is a premium-quality 50 Ohm RF cable designed for professional communication systems, amateur radio operators, commercial wireless installations, surveillance systems, and RF laboratories. Engineered for exceptionally low signal attenuation, excellent shielding performance, and long-term durability, LMR-400 is one of the most popular feed lines used worldwide for HF, VHF, UHF, and microwave frequency applications.

Whether you’re building a fixed base station, installing a repeater, connecting an outdoor antenna, or upgrading your existing feed line, the LMR-400 cable provides reliable performance with significantly lower signal loss compared to standard RG-58 or RG-213 coaxial cables. This makes it the preferred choice for long cable runs where maintaining maximum RF efficiency is essential.

Manufactured with high-quality materials, the cable features a foam polyethylene dielectric, bonded aluminum foil shield, tinned copper braid, and a durable UV-resistant polyethylene outer jacket that ensures stable performance in both indoor and outdoor environments. Its rugged construction makes it suitable for harsh weather conditions, including extreme heat, heavy rain, and prolonged sunlight exposure.

Why Choose LMR-400?

When transmitting or receiving RF signals, every meter of cable introduces some amount of signal loss. Selecting the right feed line is just as important as selecting the antenna itself. LMR-400 has become the industry standard because it offers an excellent balance between low attenuation, flexibility, durability, and affordability.

Compared to conventional coaxial cables, LMR-400 provides:

• Lower signal loss
• Better shielding against external interference
• Higher power handling capability
• Improved signal quality
• Longer service life
• Reliable outdoor performance
• Excellent impedance stability

Whether you operate on HF, VHF, UHF, or higher frequencies, upgrading to LMR-400 helps maximize the performance of your radio system.

Key Features

✔ Premium Low Loss RF Coaxial Cable

✔ 50 Ohm Characteristic Impedance

✔ Ideal for HF, VHF, UHF & Microwave Applications

✔ High Shielding Effectiveness Against RF Noise

✔ UV Resistant Polyethylene Jacket

✔ Weatherproof Construction for Outdoor Installations

✔ Flexible Design for Easy Routing

✔ Excellent Mechanical Strength

✔ Supports High RF Power

✔ Low VSWR Characteristics

✔ Long Service Life

✔ Suitable for Commercial and Amateur Radio Applications

✔ Professional Quality Feed Line

Technical Specifications

Typical Applications

The LMR-400 cable is suitable for a wide variety of RF communication systems, including:

• Amateur (Ham) Radio Stations
• HF Base Stations
• VHF Communication Systems
• UHF Communication Systems
• Repeater Installations
• Wi-Fi Antenna Systems
• Wireless Internet Service Providers (WISP)
• SDR Receivers
• ADS-B Aircraft Receivers
• LoRa Gateways
• RF Test Laboratories
• Commercial Communication Equipment
• Telemetry Systems
• Remote Monitoring Stations
• Outdoor Wireless Installations
• Industrial RF Equipment
• CCTV RF Transmission
• Marine Communication Systems

Superior Signal Performance

Signal loss increases with cable length and operating frequency. Using a high-quality low-loss cable like LMR-400 helps preserve transmitted power while improving received signal strength.

Replacing older RG-58 or RG-213 feed lines with LMR-400 can significantly improve system efficiency, especially in installations with long cable runs. Better signal integrity often results in improved communication quality, stronger received signals, and enhanced overall station performance.

Excellent Shielding Performance

The LMR-400 cable incorporates a combination of bonded aluminum foil and high-coverage tinned copper braid shielding. This dual-shield construction minimizes electromagnetic interference (EMI) and radio frequency interference (RFI), ensuring cleaner signal transmission even in electrically noisy environments.

This makes it particularly suitable for urban installations, commercial communication sites, and multi-antenna systems where interference can affect system performance.

Built for Outdoor Use

Outdoor antenna installations require a cable capable of withstanding challenging environmental conditions. The LMR-400 cable features a durable black polyethylene outer jacket that resists:

• UV radiation
• Moisture
• Rain
• Heat
• Dust
• Abrasion
• General weather exposure

Its rugged construction makes it an excellent choice for rooftop antennas, communication towers, repeater sites, and permanent outdoor installations.

Ideal for Amateur Radio Operators

LMR-400 has become one of the most trusted coaxial cables among amateur radio operators worldwide. It performs exceptionally well on:

• 160 Meter
• 80 Meter
• 40 Meter
• 30 Meter
• 20 Meter
• 17 Meter
• 15 Meter
• 12 Meter
• 10 Meter
• 6 Meter
• 2 Meter (144 MHz)
• 70 cm (430 MHz)
• Higher RF frequencies

Whether you’re operating SSB, CW, FM, AM, FT8, JS8Call, Digital Modes, Contesting, DXing, Portable Operations, or Emergency Communications, LMR-400 delivers dependable RF performance.

Connector Compatibility

The LMR-400 cable is compatible with a wide range of professional RF connectors, including:

• N Male
• N Female
• PL-259 (UHF)
• SO-239
• BNC
• TNC
• SMA
• Type-N Connectors
• Custom RF Connectors (where applicable)

Properly installed connectors ensure low VSWR, minimal insertion loss, and reliable long-term performance.

Package Includes

• LMR-400 Low Loss Coaxial Cable (Selected Length)

Connectors are not included unless specifically mentioned or selected.

Important Notes

• Sold according to the selected cable length.
• Continuous cable length will be supplied whenever possible.
• Product appearance may vary slightly depending on the manufacturing batch.
• Technical specifications are subject to improvement without prior notice.
• Professional connector installation is recommended for the best RF performance.

Why Buy from RadioHub?

At RadioHub, we specialize in high-quality amateur radio and RF communication products. Every product is carefully inspected before dispatch to ensure reliable performance and customer satisfaction.

When you purchase from RadioHub, you receive:

• Genuine Quality Products
• Quality Inspection Before Shipping
• Secure Packaging
• Fast Dispatch
• Technical Support
• Trusted Seller for Amateur Radio Equipment
• Competitive Pricing
• Reliable After-Sales Assistance

Whether you are a hobbyist, licensed amateur radio operator, RF engineer, system integrator, or commercial communication professional, RadioHub is committed to providing dependable products backed by expert support.

Upgrade your antenna system with the LMR-400 Low Loss Coaxial Cable and experience superior signal quality, reduced attenuation, and long-lasting performance for your HF, VHF, UHF, and wireless communication applications.