BULK LMR®-600 (By the Foot or 500-ft Spool)

The Times Microwave LMR®-600 coax available at rigcables.com is a premium 50-ohm ultra-low-loss coaxial cable manufactured by Times Microwave Systems. It delivers exceptional performance for demanding RF applications that require minimal signal attenuation over longer runs.

This high-quality coax features a foam polyethylene dielectric, an aluminum tape outer conductor with tinned copper braid for superior shielding (>90 dB), and a durable UV-resistant polyethylene jacket, making it ideal for both indoor and outdoor use (with excellent weatherability and a 20+ year service life in outdoor environments). It is available for purchase by the foot for custom lengths or in full spools for larger projects, providing flexibility to match exact installation needs without excess waste.

Compared to traditional RG-8U, RG-213, and even LMR-400, LMR-600 provides significantly lower signal attenuation (roughly 40% lower loss than LMR-400 at many frequencies), substantially higher power handling, while maintaining excellent shielding. Its overall diameter is approximately 0.590 inches (larger than LMR-400's ~0.405 inches), resulting in improved transmission efficiency—especially at VHF, UHF, and higher frequencies—with reduced heating during high-power operation. It is best suited for longer feeder runs where minimizing loss is critical.

Typical applications include ham radio (amateur) antenna feeder runs (particularly longer ones), base station setups, wireless communications, GPS systems, jumpers, and other RF installations where minimizing signal loss and maximizing reliability are essential. It serves as a popular upgrade over older RG-style cables or LMR-400 for modern setups that demand the lowest possible attenuation.

Key performance highlights (approximate values from manufacturer data):
- Attenuation at 450 MHz: ~1.7 dB/100 ft (vs. higher for LMR-400/RG-213)
- Attenuation at 900 MHz: ~2.5 dB/100 ft
- Peak power handling: up to 40 kW (much higher than LMR-400)
- Velocity of propagation: 85%

Note: Due to its larger diameter and construction, LMR-600 is somewhat stiffer with a larger minimum bend radius (~1.5 inches installation) than LMR-400, so plan your routing accordingly for tight spaces. For applications needing more flexibility, consider the UltraFlex variant if available.