ewanm89 at googlemail.com
Sun Sep 16 12:00:15 CEST 2007
On Tue, 4 Sep 2007 08:52:11 -1000
Jim Thompson <jim at netgate.com> wrote:
> On Sep 4, 2007, at 8:30 AM, mcb, inc. wrote:
> > On Tue, 4 Sep 2007, Richi Plana wrote:
> >> Fascinating. So "passive receivers" really aren't? Or are there
> >> classes
> >> of receivers which are (no amplification or very sensitive
> >> pickups)?
> > Crystal sets.
> no amplification: yes
> very sensitive: no.... crystal sets require a very strong AM
> modulated signal.
> If you have a very strong AM signal, and your construction skills
> are good, you don't even need the crystal:
Not to mention AM is extremely susceptible to interference, and is not
made for data modulation. But being the variety of frequencies and
modulations will be being transmitted at the plane anyway (from ground),
you are unlikely to add anymore interference. And the power of the
modulators in receivers is so low you would be hard pushed to pick it
up outside the box it's in.
Ewan Marshall (ewanm89)
Geek by nature, Linux by choice.
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