"Paul Nutteing" wrote in message
...
A small plastic box about 2 inches square roughly with a
wire and plug that you plug into your TV. If any
electronic bods know what possible technology
can do this with no power consumed I would be
most intrigued to discover.


Well one could filter out all frequencies other than the TV channels,
rectify them and somehow get enough to run a low gain amplifier at the TV
frequencies. But as to it improving things, that is unlikely.