When you pass by a ham's QTH it's always fun to try to figure out what sort of antennas a ham is using. Since G5RV says that he is using a standard 102' G5RV antenna plus a double size version, I'd have to assume that the tall pole attached to the chimney is holding the big, 204 foot G5'RV. It looks like you can see his real open-wire transmission line in this picture. I can only guess that the shorter pole is supporting a standard G5RV, but from this perspective, the antenna doesn't look big enough. Anyway, it's interesting to see how the man who popularized the G5RV uses his own antenna design.