Back when I was chief of a one stick, one kW AM station, I one time went out to
the antenna and started hearing program material.

The 135-foot antenna was shunt fed. In contact with the sloping feed wire from
the match box was a tall piece of grass. At the contact point was a white glow
and blue smoke. A little demod was going on between the dissimilar materials.

Nobody else would go inside the fence, so I had to sling blade the grass
myself.

Bill, K5BY