In my (shudder) early days on the Dark Side (11 meters) I once shaped a half
wave length of house wiring into a conical spiral (roughly 30 inches high),
hung it from a ceiling using a refigerator top as groundplane. I
communicated well with folk in the White Rock Lake area from my Carrollton
home (approx 20 miles) with a legal unaltered 4 watt transceiver. Fiddling
about with antennas has always been an interest of mine.

Harold
KD5SAK

"Cecil Moore" wrote in message
. net...
Sal M. Onella wrote:
What, if anything, do we know about the concept of a log spiral ground
plane? Genius or snake oil or something in-between???

I believe it's called the "Golden Ratio" based on
Fibonacci numbers and works as well as any other
ground plane including fractal ground planes. It,
like a fractal, is based on packing the most stuff
in the least amount of space.