Hi, I am in the process of adding a new TV aerial socket and at the same time moving a radiator. The rad is fed with 10mm plastic pipe (Hep20) and the plan was to use the now empty pipe as a conduit for the co-ax - problem is the co-ax is just too thick to fit through the pipe. I have a short length of quite old thinner co-ax but I presume that the thinner cable would not be as well shielded as the thicker variety and give an inferior picture. So my questions are, would thinner cable mean poorer quality? and if not, is it available? Thanks in advance.