I am also curious about the cable. At the start of the video, its upper end is clamped on to a part of the antenna. The guy appears to be about take the lower end off what I am guessing is a grounded part, then he decides to give the demonstration. So, in the beginning, is this a live antenna that was shorted to ground while still being powered? (perhaps because it was being worked on?) If so, it seems a rough way to handle the transmitter, though I suppose it must be robust enough to handle lightning strikes (you can see two rods with balls on the end that I guess make a spark gap.)<p>Alternatively, could this be an unpowered antenna that is picking up signal from a nearby powered one?