just to reiterate... with a simple CB setup, a 1/2 wave Big Stick (vertical) on 20' antenna mast with good ground, a 12vdc power supply and a Cobra 19, I got reliable 10 mile range to similar base station setups.... not too many hills here on the west coast of Florida though...I still have one in my car, and it has been valuable in finding alternative routes in case of a pile up on I-75...