Coax Length Question Box

FREE SHIPPING ON ORDERS $75+
TECHNICAL & INSTALLATION RESOURCES | 30,000+ SATISFIED CUSTOMERS TECHNICAL & INSTALLATION RESOURCES
30,000+ SATISFIED CUSTOMERS

Coax Length

Choosing Between 9' vs 18'

If your CB installation is done perfectly, it shouldn't really matter what length coax you use.  But we've found that in the event a less-than-perfect antenna location is chosen, coax lengths of 18' help to lessen the problem vs. exacerbate it.  For this reason, we recommend 18' coax for mobile installs, as it provides a bit of performance cushion in case the antenna isn't working at 100%.

That being said, using a 9' coax isn't a problem.  Just understand that 9' lengths will provide less "grace" in the event of SWR issues / a non-ideal mounting location, so you'll want to take extra care to install your equipment properly and ensure a properly tuned antenna.  

25'+ for Base Installs 

Coax in lengths of 25' increments are commonly used in permanent / base installs without issue.