On 25/10/2007 10:57 AM, Stephen A. Lawrence wrote: > [Message bounced the first time, permanent fatal error on the Vortex > address -- ??? -- I'm resending it. Sorry if you see it twice.] > > Michel Jullian wrote: >> ----- Original Message ----- >> From: "Stephen A. Lawrence" <[EMAIL PROTECTED]> >> To: <[email protected]> >> Sent: Thursday, October 25, 2007 2:40 PM >> Subject: Re: [Vo]:Re: "Cold" electricity >> >> >> >> >>> 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. >>> >> >> Maybe an old fashioned pressure cooker would make a nice Faraday cage, the >> vapor outlet hole could serve to let the wire in... >> >> I think it has been stated in a variety of ways by a variety of people >> (Terry, Bill...) that the Faraday cage should be grounded, I can hardly >> believe this hasn't been tried yet... > > > Sorry to be contradictory, Michel, but that is almost exactly the > /opposite/ of the point raised by Horace. > > It doesn't matter whether the cage is "earth"-grounded or not; the earth > ground is a red herring. The point is the circuit inside must be > connected TO THE CAGE, not (solely) to an external ground, and must be > tied to the cage by a wire which is internal to the cage, not by a long > looping external path. > > Earth-grounding the cage makes it impossible to "see inside"; a grounded > cage blocks all electrical fields inside from escaping. An ungrounded > cage does not. But, conversely, an UNgrounded cage blocks external > fields from entering the cage just as well as a grounded one. In this > case, that's all we care about, and the "earth ground" of the cage > doesn't matter.
You don't care about the earth ground, if you have already made up your mind that a conventional explanation is good enough. Harry > (Does the pie plate turn transparent when the ground > wire is removed? Visible light is, after all, just high frequency EMR > -- or at any rate it can be so modeled when attempting to understand its > interaction with a conductor.) > > If the cage and the circuit are tied to "earth ground" SEPARATELY then > the area of the loop made by the (separate) ground wires acts as an > antenna (obviously!) and the circuit cannot be said to be "grounded to > the cage" in any useful way. Until now, that sort of "grounding" is all > that had been mentioned, and it is all that has been done, as far as I know. > > Until Horace's post, no-one, as far as I know, had suggested tying the > ground wire from the circuit directly to the cage, so the circuit was > "grounded to the cage" by a conductive path which was contained entirely > within the confines of the cage itself. > >> Michel >> >> >> >> >
