We have a Case IH 8120 combine with a Hillco leveling system. We use Uniden 510XL in everything except a couple of rigs have 520's. The problem with the one in the combine is it picks up noise from the leveling system. It only goes off when it is activly moving, or adjusting either way. If you flip the system to manual so it doesn't move (but is still on) the CB is fine. Any ideas on how to solve this issue? If you unplug the antenna from the back of the CB it never picks up any noise. So I think its an antenna problem, not power. With the leveler system off, the CB works as it should. I've tried covering the box that the computer is in with tin foil thinking that might help, but to no avail. The antenna wire crosses the hillco wires at a 90 degree angle so I assume there wouldn't be much to pick up but maybe I'm wrong?? There is no other way to route the wires in the cab. Would it be better with a different CB? Like a cobra or other? In order to use it, I have to have the squelch up to 3/4 or more. Which isn't normally an issue, but if anyone tries to talk to me more then 75-100 yards away, I can't hear them. They can hear me fine. Not a really big deal, except if a fire breaks out behind me I need to know it ASAP. Thanks for any help you can offer.