Guys, have moved the TV & surround from one end of the room to the other but now all the services are at the wrong end of the house. Have run a cable ouside that I plan to run up the wall towards where the old aerials are. Can I use a diplexer to get both services down the same cable? Tv is on the chimney, Radio is mounted on the facia board at the back of the house. The newly run coax will go up the outside of the house over the roof and join onto the orignal lead from the TV aerial on the chimney at eaves height at the back of the house next to where the radio aerial is. So I need to combine both aerials down the one new lead or am I barking up the wrong tree.