The MV3A antenna is made by Diamond. It is a long whip with loading coils to give it 4 band capability. See http://www.rfparts.com/diamond/mv3atech.html
. We have the 10m and 20m coil so it is supposed to be effective on 2/6/10/20 meters. We are using a cheap Radio Shack SWR meter for our measurements. We've added several gound straps with little noticable effect. I think we will try to get a dremmel and make sure the straps are well connected (we used a file before but we'll do it just to make sure). Could the problem come from the proximity of the antenna to the back corner of the truck? Does that change the characteristic impedence of the antenna or just the radiation pattern? Or could poor grounding cause the SWR to be so high? Thanks again for all the help.