"ish" wrote in message
ups.com...

BBC article stated 10 MHz.
http://news.bbc.co.uk/go/rss/-/2/hi/...gy/6725955.stm


Thanks. An older link at the side of your linked page has the system at 6.4
Mhz.

http://news.bbc.co.uk/2/hi/technology/6129460.stm

I'm guessing the most useful resonant coupling distances are going to
coincide with SW frequencies. Governments are likely to protect MW and VHF
frequencies, but they'll care much less about SW interference. And this
scheme is never going to be close to 100% efficient and is going to radiate
like all hell.

Fortunately, the picture in the article you gave looks more like some
Heinrich Hertz experiment than a demonstration of a practical application.
Maybe this will be obselete before it's developed.

Frank Dresser