[TowerTalk] trees as antennas

[Dan]

Many years ago, Electronics magazine had a picture of an experiment to
use a tree as a vertical antenna. The RF was coupled to the tree with an
air core toroid. It looked like a coiled spring, possibly 6 inches in
diameter,wrapped around the tree at about 3 or 4 feet above ground. I
believe the work was being done by some military lab or contractor.
  I retired in 1985 so it was before that.
73, Dan, N5AR