|I live in an apartment building and want to put a G5RV on the roof. I have to keep the entire structure out of view from the street, and also avoid running coax on the roof surface. These restrictions necessitate my taking a bit of liberty in the placement of the G5RV.
The roof is about 60ft above ground. I do not intend to invert the G5RV, but rather support both ends by stringing them up to two convenient tie points on the roof. My main question concerns the 31ft 450 ohm ladder line matching section. I read that the ladder line should come away from the flat-top at a right angle for at least 15ft. Can I run the ladder line down the side of the apartment building brick wall and near a fire escape, or will the brick wall negatively effect the intended properties of the line? Furthermore, can the antenna be about only 5ft off the surface of the roof and still give good performance?
Thank you - KA2KNX