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Re: Faraday cage

Original poster: "Ed Phillips by way of Terry Fritz <twftesla-at-qwest-dot-net>" <evp-at-pacbell-dot-net>

Tesla list wrote:
> Original poster: "Jim Lux by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> ----- Original Message -----
> From: "Tesla list" <tesla-at-pupman-dot-com>
> To: <tesla-at-pupman-dot-com>
> Sent: Saturday, May 11, 2002 11:34 AM
> Subject: Re: Faraday cage
> > Original poster: "davep by way of Terry Fritz <twftesla-at-qwest-dot-net>"
> <davep-at-quik-dot-com>
> >
> > > Was very effective in keeping high energy RF/arcs away
> > > from me.  Cut off frequency is 1/2 wavelength of longest
> > > opening if memory is right,
> >
> >
> > Single longest dimension _is_ key:
> > Thus a door, 2' by 6' is about as leaky as
> > an 'unlaced' corner, 1" by 6".
> For what it's worth, all the dimension stuff is totally irrelevant if you're
> nowhere near the wavelength of the EM radiation you're trying to stop... So,
> unless you're worried about 100 MHz  (3 meter wavelength) noise from your
> TC..

	When I run my little 3" x 15" coil at 600 watts input I don't get much
BCI at all.  However, it does cut up the TV pictures.  I disconnected
everything but the capacitor and the gap and found that the TVI didn't
change much, so assume all of the interference (at least in this case)
is coming from the gap/capacitor leads, as you hypothesize.

	If you think about the circuit formed there, it's not much different
from what Hertz used in his pioneering experiments.