Claudius Li wrote: > > On Mon, 13 Sep 1999, Thomas Geer wrote: > > > Hmmn, > > I remember, possibly incorrectly, that a f-cage will protect you from > > standard EM interference, but not from an emp. The analogy was on the > > order of stopping ordinary vs laser light source. I think > > that lead and or stell shielding must be used to stop the pulse from > > either a nuke or an emp gun. I guess it al depends on the strenght of the > > pulse. > > > I'm not sure either but I think an f-cage will work fine if it conducts > well enough. > > > I don't think you are allowed to protect your electronics from emp's. The > > standard FCC warning on all pocket electronics should make that clear. YOu > > know the one, reads something like this device must accept all > > interference wether destructive or not. You can find it on all pocket > > phones, calculators etc. I think that basically means that if the "fit > > hits the shan" so to speak that FEMA or whomever will simple pulse our > > sorry asses into pre pda bliss. > > > > #endrant > > thom > True, but I don't think there are any laws against shielding my house. If > my electronics happen to be in that house... > After all, elevators, tunnels, and some car bodies act as pretty good > f-cages but it's not illegal for me to have my electronics while I'm in > one of those. > The FCC warning on electronics is informative only, you are still allowed to add protection to electronics devices. If milk had a warning that it might spoil if left un-refrigerated, would you still put it in the fridge? As for Farraday cages (I don't know how to spell it either), you might be better-off with copper screening. The small holes don't matter and you would still get natural light into your house. The most important thing about a f-cage is that it must completly enclose the protected area. Any hole or crack larger then a few millimeters will cause leakage. And grounding, although unnecessary, does help. To protect yourself from something as powerful as a EMP, all you need to do is use better conductors, such as screen made from 14 gauge solid gold wire. -- Robin Burgener / Linux Kernel Group / COREL Corporation mailto:web: http://207.236.3.210 20Q: http://come.to/20q or http://207.236.3.210/avm.html -- Subcription/unsubscription/info requests: send e-mail with subject of "subscribe", "unsubscribe", or "info" to
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