Originally Posted by wbwell
I positioned the antenna directly above the TV in the attic. So hopefully it will make for an easier drop between the walls.
You shouldn't worry about positioning the antenna directly above the TV. You may have to move the antenna around a few times in order to find the spot where reception is best. From the antenna you can run a long coax cable dropping it in the hole above the TV.
Radio Shack also has wall plates for the cable that don't require you to nail them to a wall stud. They come with an instruction sheet.
If you're drilling from above, make sure you're not drilling into a wall stud. Otherwise you'll never see the hole appear
I have a stud finder that tells me where the wall studs are and then I can drill between them. Some wall studs have crossbeams between them (rare) so if you drop the cable down you may hit that piece and wonder why the cable never made it to the bottom.
I locate where to drill the hole by reference to something (eg what relationship is the entry to the attic with respect to where the TV is below). Do some measuring and you'll know where to drill.
Once I've cut open a square in the wall for the wall plate, I shine a flashlight into it so I can see it from above (peering down into the hole I've drilled in the attic). Sometimes I tape the coax cable to a long rod and let it down the hole aiming for the light. Then from the hole below I grab the cable.
If your attic doesn't have a floor and you're balancing yourself on the attic beams, be careful. Ceilings aren't very sturdy (and a friend of mine went through one). Even leaning on them strongly may crack the paint in the ceiling below the attic. If you don't have an attic floor, it may be good to take a wide plank you can lay across some beams in order to make yourself comfortable when drilling.