[TowerTalk] Fwd: trees as antennas

[hanslg at aol.com]

 I was told (second hand) around 1975 that the US army was making experiments with large toriod (ferrite) transformers what "wrapped" around trees. As I haven't heard anything about it after that I can only assume it didn't work that well. The "spring coil" type shown on the "net" looks interesting and I might redo the test. Have plenty of trees around my lot and the test would be rather simple to do. Hear you on 160m!?!?.

73 de N2JFS


 


 

-----Original Message-----
From: Dan <n5ar at air-pipe.com>
To: Tower Talk <towertalk at contesting.com>
Sent: Sun, 26 Apr 2009 12:40 pm
Subject: [TowerTalk] trees as antennas










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

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