So CB is limited in power because of where it lies on the radio freq spectrum. I believe it's something like 11 meters. That makes it an HF frequency. If you add more power you need a license to operate it, and at that juncture you might as well go ham and get 10 meter, 2 meter and 70cm at up to 100 Watts with an entry level license "legally." Btw, those frequencies at even 50 Watts can transmit and receive for miles and miles even with minimal line of sight, so in an emergency, ham usually out performs cb anyway.10 meter is also HF, but not many people use it because of the step and the amount of interference it is susceptible to and the traffic that is commonly attributed to it being HF. I believe it's more popular in Europe than in the states. That being said, there is only so much you can do for noise on cb. Make sure your antenna is more than your radio needs to operate, watch out for tight twists and turns in the antenna cable, make sure you have an ample ground plane for the antenna, make sure your radio is properly grounded, use ferrite beads on your power lines to the radio to help with RF interference, don't allow your antenna cable to run perpendicular to any power lines in the vehicle, and always test your setup with a decent swr meter before you actually try to transmit. Hope that helps. If you're ever coming out near Ventura county, let me know as I'd gladly take a look at it for you. 73!