JEFA Tech Blog

Uniden SDS200 to OmniX base antenna cable recommendation

Posted by A.J. Farmer on

Uniden SDS200 to OmniX base antenna cable recommendation

Question from John: I have a base scanner Uniden SDS200 that I am looking at doing about 75' run to an OmniX base antenna to pick up mainly 800 Mhz frequencies. What cable would you recommend? What ends would I need for the cable? Answer: Hi John, For connectors, the SDS200 has a BNC Female antenna connector.  The OmniX base antenna has an N Female connector.  So your cable will need to be BNC Male to N Male. I have two cable recommendations, LL240FLEX and LL400. The LL240FLEX is a 0.240" diameter cable and has a stranded center conductor which...

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Which cable is best for my ham radio shack? HF 2m/440

Posted by A.J. Farmer on

Which cable is best for my ham radio shack? HF 2m/440

Bruce asks:The situation: 1. HF: 35 feet to the hole in the wall of the house, then add 5 more to the radio.2. 2m/440: 41 feet to the hole in the wall, and 5 more to the radio.Which is best RG-213/U or LL400?  The LL400 you have appears less loss than 213 and is slightly less, which surprised me. Also it seems that against everything I have read online that 400 is very stiff, it has a better bending radius than the 213 you carry. So your recommendation?I prefer putting on the pl-259 myself. So to seal the connections, your recommendations?...

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Which cable to choose for my 5G or 4G/LTE modem/router and external antenna?

Posted by A.J. Farmer on

First is the cable type, we have 240F and 400F. The number refers to the diameter of the cable 0.240" and 0.400". The 240F is the smaller diameter of the two options. It is smaller and more flexible, the tradeoff is it has more signal loss than the 400F, so it's generally recommended for under 50' lengths.We offer the 240F in a single lead and dual lead configuration as an extension cable:Single Lead SMA Male to SMA Female:https://www.jefatech.com/collections/3g-4g-lte-antennas/products/tgx-04-a-001Dual Lead SMA Male to SMA Female:https://www.jefatech.com/products/dual-sma-antenna-extension-cable-for-4g-lte-5g-modems-and-routers/The larger diameter 400F has a lower signal loss than 240F but the tradeoff is it is...

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JEFA Tech LL400 cable has a Copper Clad Aluminum center conductor. Is this better or worse than a solid copper center conductor?

Posted by A.J. Farmer on

A copper clad aluminum center conductor is the standard in the industry for RG-8 size low loss cable such as JEFA Tech Low Loss 400.  CCA is preferred due to the lower cost and lower weight vs solid copper.  All major manufacturers use copper clad aluminum center cores for this type of cable.  This includes Times Microwave LMR-400 and Commscope WBC-400 among other major brands. RF energy travels on the outside skin of the conductor, not the center, so it will be on the copper part of the center conductor and not the aluminum.  This is known as "skin effect".  There...

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Is JEFA Tech coax Plenum Rated?

Posted by A.J. Farmer on

JEFA Tech brand coax is not plenum rated.  However, we have plenum and low smoke rated cable available through partnerships with other manufacturers such as Times Microwave and Commscope.  We provide full cable assembly production of plenum cabling as well as raw cable by the foot. Be aware that plenum rated cable is significantly more expensive so it is quoted on an as requested basis. Contact us with your cable requirements including type of cable, length and connectors needed and we are happy to provide a quote. What is a plenum and why do you need plenum rated cable? A plenum is...

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