On Oct 25, 2007, at 9:45 AM, William Beaty wrote:
On Thu, 25 Oct 2007, Stephen A. Lawrence wrote:
Horace Heffner wrote:
Good point. Another option along the same lines might be to simply
strip a section of the ground wire and connect the ground wire to
the
faraday cage at the entry point using an alligator clip. It the
lights go out then the power is from an external source.
Wow, that's perfect!
Now why wasn't this obvious to start with? Dunno -- maybe it was to
others, but it sure wasn't obvious to me, at least.
But Ron DID report that the lights go out if you ground the cage. And
then there apparently was a bunch of flaming going on about whether a
Faraday cage is still a shield if not grounded.
If the lights go out when the cage is grounded then it appears power
is being supplied to the circuit and there remains the difficult
problem of measuring the energy input to the circuit. It could still
be an ou circuit, but establishing that requires actual input and
output power measurements or, much preferably, closing the loop.
Horace Heffner
http://www.mtaonline.net/~hheffner/
