[R-390] Elephant Cages

[Bob Tetrault]

Cecil,

The Elephant cages had enormously complicated (but so what? to Uncle Sam)
coax lead/lag phase switching tied to that circular array. They could be
steered just like a rotary beam and had accurate directivities of a degree
or so, besides being able to change beam angles nearly instantaneously. It
really didn't take dozens of receivers; just one, but it would take several
widely spaced arrays to triangulate a particular emitter. There's a brief
overview of these Wullenweber arrays in the ARRL handbook with some theory.
More to be found elsewhere should you care to Google.

Bob
Portland, OR