I haven't ran one mobile so I can't tell you for sure. As far as the solid copper goes, (I imagine you are talking about "hard line") It is indeed used a lot for VHF/UHF coms in a shack where you may have real long runs to the antenna, as it is the lowest loss cable you can use. But as far as mobile goes, I don't think I would go to that extreme. As long as you use a good quality jumper (9913 coax) between the radio and tuner, and even from the tuner to the antenna, you shouldn't have any problems. 9913 is a real good coax for VHF/UHF coms.