The LMR-400 coaxial cable is a top-tier choice for a variety of communication needs, offering impressive durability and performance. With an outer diameter of 0.405 inches, this cable is enveloped in a robust PE Type III jacket, ensuring it can withstand environmental elements while being UV-resistant and suitable for direct burial.  Its center conductor, crafted from copper-clad aluminum, measures at a solid 10 AWG, providing excellent signal transmission. The dielectric core, made from gas-injected foam polyethylene, has an outer diameter of 0.285 inches, optimizing the cable’s velocity factor to an impressive 85%. This cable features a dual shielding system for superior signal protection: a 100% coverage aluminum bonded Mylar foil as the first shield and a 95-96% coverage tinned copper braid as the second. With a minimal signal loss of 0.7 dB per 100 feet at 30 MHz, it’s perfect for ensuring high-quality signal integrity over long distances. Sold by the foot, this cable is ideal for custom installations. 
 
Here's what you can do to make the most of your LMR-400 coax cable:
Ensure your cable route allows for minimal bends to maintain signal integrity.
Use proper connectors to match the cable’s specifications for optimal performance.
Consider the environmental conditions and additional protection if necessary, even though it’s UV-resistant and direct-bury capable.