Numark CB-140 SWR/FS CB RF Multi Meter

Numark CB-140 SWR/FS CB RF Multi Meter

There is a great article on Tuning a CB (which is on the 11 meter band, just below the Ham Radio 10 meter band) It has detailed instructions and l number of very informative videos.

https://www.wearecb.com/how-to-tune-cb-antenna.html