I was using a mag mount with a 1/4 wave whip mounted to the top of a toolbox in the bed of my F150. I purchased a camper shell and removed the box necessitating relocation of the antenna. I decided to take the plunge and drill. Last night I installed an NMO mount just in front of my 3rd brake light on the cab roof. I used the same 1/4 whip off of the mag mount. After soldering on the connector and hooking it up, I fired up my radio and found that it would stop on a repeater where I would just hear static and my meter would be about half way up. I got out my multimeter and checked that I didn't short out the connector and as far as I can tell its good. I thought maybe it was because I was in a metal shop but it was working fine when I was doing some other stuff to the truck in the shop before I changed the antenna. It seems to be receiving fine but just stops on these random repeaters with just static. It doesn't seem to be any one repeater as I have seen 3 different ones last night and this morning. The signal is so strong that it will open the squelch even all the way up. What could I have possibly done wrong?