My AM/FM radio is full of electrical noise. When installed, the 2 ft. long antenna wire was simply put into a wire bundle which I blame for some of it. I get very poor reception. I also have a great deal of noise coming from the AC powered battery charging system. My question is; Has anyone installed a auto antenna that works? How and where should it be mounted? Can I install a noise surpressor in the DC power line? Will that help?Thanks,Wayne