JEFA Tech Low Loss 400 Cable Assembly

SKU: CA-400-C1-C2-1
  • $22.99

IN STOCK: - Do you need more? We have short lead times on most products! ON BACKORDER WITH SHORT LEAD TIME

Prefer to order by phone or have questions? Call us at 888-467-2258
Large order requirement or ongoing needs? Bulk discounts and credit terms are available.
Not enough of this item showing in stock? We have short lead times on most products!
Not exactly what you need? We specialize in custom work! Please ask!
Please contact us for assistance!

JEFA Tech Low Loss 400 is the most popular "workhorse" cable of the wireless LAN industry. It has a perfect balance of flexibility and low signal loss. Low Loss 400 is the most popular feed line for permanent installations. It has a 0.405 inch outside diameter and features a solid center conductor for greatest performance, foam dielectric and double shielding for low signal loss and interference rejection, combined with a direct burial capable, UV resistant Polyethylene jacket.

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
  • Polyethylene Jacket - provides full waterproofing and UV Protection
  • Solid Copper Clad Aluminum Center Conductor
  • Direct Burial Rated - no conduit needed
  • 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, 20+ 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 100/ft - (lower numbers are better)

Frequency / Band JEFA
7 Mhz (40 meters) 0.33 0.33 0.33 0.49
14 Mhz (20 meters) 0.46 0.46 0.46 0.70
28 Mhz (10 meters & CB) 0.65 0.65 0.65 1.01
50 Mhz (6 meters) 0.88 0.88 0.88 1.36
144 Mhz (VHF) 1.50 1.50 1.50 2.38
220 Mhz (VHF) 1.86 1.87 1.87 3.00
450 Mhz (UHF) 2.71 2.71 2.71 4.46
900 Mhz (UHF) 3.90 3.90 3.90 6.64
1.5 Ghz (MW) 5.12 5.12 5.12 8.99
2.5 Ghz (MW, WiFi) 6.76 6.76 6.76 12.32
5.8 Ghz (MW, WiFi) 10.8 10.8 10.8 21.28


Are you an amateur radio operator? This cable is the same size as RG-8 and RG-213 but with much better performance. 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.  JEFA Tech coax is used by many fine ham radio operators world wide and is even used by the experimental HAARP (High Frequency Active Auroral Research Program) in Alaska.

CB OPERATORS - Get the most bang for your buck by upgrading your coax cable to JEFA Tech LL400.  Trusted by many CB operators for years.

We stand behind the quality and performance of the cable and offer a 30 day money back guarantee.

See spec sheet for cable dimensions and full attenuation ratings.


QUALITY AND PERFORMANCE: This cable is professionally assembled and tested in our manufacturing facility in Maryland, USA! We stand behind the quality and performance of our cables. Our cables are guaranteed to be of the highest quality and performance or your money back.

PRODUCTION DETAILS: You are purchasing a completed cable assembly with connectors professionally attached to the cable. The ends are soldered and crimped, heat shrink is applied to seal the cable to the connector and provide additional support and the cable is then tested to ensure proper assembly and performance.

We use Agilent N9912A RF Analyzers for cable sweep testing.

SAME DAY SHIPPING: These cables are built-to-order. We have an optimized production line for these assemblies so most orders will ship the same day!

CUSTOM PACKAGING, LABELING, BUNDLING, BARCODING: We can further customize your cable.  Click here for options.

Since these cables are built-to-order, they are not returnable if you make a mistake when choosing the connector types or length. To see pictures of connectors, please see the connector identifier link at the top of the website. If you need assistance, please contact us.

We Also Recommend