(Araucaria) Giant antenna, giant interference!

[PY2ZX]

Olá amigos,

Vejam esta pesquisa e tirem suas próprias conclusões sobre RFI:

http://www.sciencedaily.com/releases/2010/09/100915094230.htm

"Patel's team has devised a way to use copper electrical wiring as a
giant antenna to receive wireless signals at a set frequency. A
low-power sensor placed within 10 to 15 feet of electrical wiring can
use the antenna to send data to a single base station plugged in
anywhere in the home... They discovered that home wiring is a remarkably
efficient antenna at 27 megahertz. Since then, Patel's team at the UW
has built the actual sensors and refined this method (...) Cohn also
discovered some surprising twists -- that the sensors can transmit near
bathtubs because the electrical grounding wire is typically tied to the
copper plumbing pipes, that a lamp cord plugged into an outlet acts as
part of the antenna, and that outdoor wiring can extend the sensors'
range outside the home".

Flávio PY2ZX