giles.jones at zen.co.uk
Tue Sep 4 19:47:53 CEST 2007
On 4 Sep 2007, at 18:38, Richi Plana wrote:
>> with. See http://en.wikipedia.org/wiki/Heterodyne for a very
>> basic description.
> Fascinating. So "passive receivers" really aren't? Or are there
> of receivers which are (no amplification or very sensitive pickups)?
> Prolly off-topic, but I sure am curious. Are there no radar detectors
> which don't give off their presence?
In the UK you have to have a TV licence if you receive TV. They use
detector vans and can tell if you're watching. So there is enough
signal emitted when receiving I guess.
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