I picked up another DX-350. It has DEI's. When I hook up any CB or Export radio, It has high SWR on channels 1-18, like real high. All the other channels, it's flat. I'm driving around a watt or so, into a Gainmaster. My analyzer shows flatness. My other 350 with Toshiba's, behaves normally. Is this a DEI thing? Oscillations?