Well darnitall! There goes my idea for a wireless extension cord!

Irv VE6BP

wrote in message
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NM5K wrote:
On 4/5/2012 8:10 PM, Channel Jumper wrote:


Tesla was just stuck on trying to transmit electricity.
If you think about all the money spent on telephone poles, rights of
ways, copper wire etc - if he could have perfected it - it would have
made him a millionaire.

Dunno.. Transmitting electricity through the air strikes me as
quite lossy, and if using a broad pattern to enable many people to use
it, the amount of recoverable energy vs what is transmitted would be
fairly small. A large amount would go off into space totally wasted.
If his method were actually practical, I suspect someone would be
using it by now on some scale.

Exactly why the idea isn't used for anything much heavy duty than charging
a cell phone or a cordless toothbrush.

But system efficiency and losses were not something Tesla took into
concideration, nor was much thought put into how one whould charge
customers when they could have built the "receiver" end themselves
and obtained his electricity for free. Not a viable bussiness model.