[TowerTalk] 30m AC Power Transfer Antennas

[Roger (K8RI)]

How about some information on these.
Do they work like the ones on my wireless headphones where the headset 
places a spiral inductor/antenna right next to the cradle when not in 
use, of will they charge the phone battery any where in a room?
In the case where they are inductively coupled there is very little 
radiation, but if they even charge more than a couple inches away it's 
going to take a substantial signal and it certainly wouldn't be green.

73

Roger (K8RI)

K1TTT wrote:
> Just wait till the paranoid e-m field haters get wind of this and realize
> that it fills the area with a relatively strong field.  It might be
> interesting to see what it does to nearby AM receivers and shortwave stuff
> besides just ham bands.  I would guess they could work it in an ISM band if
> they could keep it clean enough, is there one of them around 30m??
>
>
> David Robbins K1TTT
> e-mail: mailto:k1ttt at arrl.net
> web: http://www.k1ttt.net
> AR-Cluster node: 145.69MHz or telnet://dxc.k1ttt.net
>  
>
>   
>> -----Original Message-----
>> From: WA3GIN [mailto:wa3gin at comcast.net]
>> Sent: Saturday, July 25, 2009 11:58
>> To: TOWERTALK at contesting.com
>> Subject: [TowerTalk] 30m AC Power Transfer Antennas
>>
>> Hi Folks,
>>
>> Tesla's wireless power transfer has returned targeting the hundreds of
>> millions of cell phone owners!
>>
>> I wonder how far from the 30M source the signal used to charge these
>> devices can be heard?
>>
>> The radiating element/antenna must be very efficient for this thing to
>> pass the green test. I wonder how well such a radiator would work on ten
>> meter?
>>
>> http://news.bbc.co.uk/go/em/fr/-/2/hi/technology/8165928.stm
>>
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