I dug out my fathers old Hallicrafters S-40B last night and it still works like a dream. I would like to put up a long wire antenna in the attic. The attic is T shaped. I was thinking down one side, up the middle and back down the other in the shape of a squared off M about 10 feet apart on the legs in just the larger attic. My other choices would be down 15 ft turn left and run it another 30 feet in an L shape or I could take it in a U for an additional 30 feet in the smaller attic space, or finally, around the whole attic for about 125 ft. Any thoughts? What's the correct wire size? Thanks.