-=> Quoting Joe Paulson to All <=-

 JP> I came across an excellent 2 page article on antennas in
 JP> Scientific American,May,2003  P.89-89
 JP> Describes AM,FM,TV antennas and horizontal,vertical and 
 JP> corkscrew polarizations.
 JP> I didn't realize that for AM, you might need a 500 foot antenna.

 Wavelength in meters = 300/frequency in MHz

 Lower frequency = longer wavelength

 1000KHz on the AM band = 300 meters = 330 yards = 990 feet
  600KHz on the AM band = 500 meters = 550 yards = 1,650 feet

 Thank goodness ¬-wave and «-wave antennas work well.
 And luckily a receiving antenna measurement isn't as
 critical as a transmitting antenna.  Manufacturers
 are able to wind the antenna on a coil about the size
 of a pencil, or many loops (racetrack-fashion) on the
 inside of the rear cover.

 Try designing an antenna for submarines, which use
 frequencies around 300KHz.    There was quite a
 stink raised in Wisconsin when the Navy wanted to
 build a new "antenna farm" in America's Dairyland.

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