LMR400 FLEX Coaxial Cable 25ft Low Loss Coax- FREE SHIPPING!

LMR 3 ft jumper with PL259 ends

This is high performance coaxial cable which has become the standard of the outdoor wireless LAN industry. It is also used by Amateur Radio stations looking for higher performance for VHF/UHF, microwave, and satellite communications as compared to standard RG-8/U. It also works very well on HF, with much higher power handling capability than other coax alternatives.


  • 50 ohm impedance
  • .405" outer diameter (same as RG-8, RG-213, LMR-400, etc)
  • Lightweight, Flexible
  • Thermoplastic Elastomer Jacket - softer, more flexible than polyethelene - full waterproofing and UV Protection
  • Stranded Copper (7 x 0.036") Center Conductor
  • Double Shielded for low loss and interference rejection
  • First Shield: Bonded aluminum foil with 100% coverage
  • Second Shield: Tinned copper braid with 98% coverage
  • Foam Dieletric - adds to flexibility and performance
  • 5 year warranty, 10+ year life expectancy
  • Uses same size connectors as RG-8, RG-213, LMR-400 size cable, including standard PL-259's

Comparison of Popular .405" Size Coax
Attenuation (Signal Loss) per 3/ft - (lower numbers are better)

Frequency / Band

7 Mhz (40 meters) 0.39 0.33 0.39 0.49
14 Mhz (20 meters) 0.55 0.46 0.55 0.70
28 Mhz (10 meters & CB) 0.79 0.65 0.79 1.01
50 Mhz (6 meters) 1.05 0.88 1.05 1.36
144 Mhz (VHF) 1.81 1.50 1.81 2.38
220 Mhz (VHF) 2.25 1.87 2.25 3.00
450 Mhz (UHF) 3.25 2.71 3.25 4.46
900 Mhz (UHF) 4.68 3.90 4.68 6.64
1.5 Ghz (MW) 6.15 5.12 6.15 8.99
2.5 Ghz (MW, WiFi) 8.12 6.76 8.12 12.32
5.8 Ghz (MW, WiFi) 12.9 10.8 12.9 21.28

WIRELESS ISP's: This high performance cable has become a "standard" of the outdoor wireless LAN industries. It is ideal for your 802.11 (a,b, or g) cell sites and customer installations.

Are you an amateur radio operator? Upgrade your shack to this higher quality, much lower loss cable today! It will dramatically reduce your signal loss on VHF and UHF. It will increase your receive signal and handle more power on HF.

QUALITY AND PERFORMANCE: We stand behind the quality and performance of our cables. Our cables are guaranteed to be of the highest quality and performance.

You are purchasing a completed cable assembly with connectors professionally attached to the cable. The conductor of the cable is soldered to the connector pin or jack. The body of the connector is soldered to the shield of the cable using a professional soldering tools. This provides an evenly distributed and robust mechanical connection for the braid. Heat shrink is applied to seal the cable to the connector..

3ft lmr400
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  • Item #: LMR400 FLEX Coaxial Cable 25ft
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Price $80.00