I'm studying up for the amateur tech radio license and understand that there are ways to make arig that works well for HAM on a jeep but can be tuned/powered down to CB when doing wheeling events. The HAM is important to me for my work in emergency management, but I also want CB ability for Jeep group stuff. I really want to only run a single antenna and unit. Is it possible? What antenna would be best if mounted above the spare? What unit has or could have the ability to tune down as to not obliterate the CB bands?