ki4SGU :: ok lets cll checken wire
WB4MAK :: http://en.wikipedia.org/w...iki/Faraday_Cage
ki4SGU :: thanks
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WB4MAK :: Coaxial cables are in fact data cables wrapped by a hollow, flexible conductor, effectively a Faraday cage.
W2FMU :: Some coax is 85% some is 90% some is 95% - higher is usually better
W2FMU :: % shield that is
KJ4CUS:Joh :: Guest 2238 enter your call sign in the bottom lft field and click say
W4QO.jim :: INFO ON TOROID TYPES
W4QO.jim :: I'll see Jim Kortge K8IGY on Thursday so I'll ask him
ki4SGU :: I'm sorry ... hi hi
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KJ4BTB :: I think the spacing and size of the holes was significant
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W4QO.jim :: hello KJ4BTB
W4QO.jim :: and K4YJI
ki4SGU :: Does Jim Kortge live in the area... I'm a fan
W2FMU :: Several factors serve to limit the shielding capability of real RF shields. One is that, due to the electrical resistance of the conductor, the excited field does not completely cancel the incident field. Also, most conductors exhibit a ferromagnetic response to low-frequency magnetic fields, so that such fields are not fully attenuated by the conductor. Any holes in the shield force current to flow around them, so that fields passing through the holes do not excite opposing electromagnetic fields. These effects reduce the field-reflecting capability of the shield.
KJ4BTB :: HI Jim I was listening in - not sure if I was heard over the net
WB4MAK :: kj4btb ... I have you checked in
WK4U _ Tim :: nite all
W4QO.jim :: guest 2238 can you tell us who you are?
WB4MAK :: good night
W4QO.jim :: just hit SAY a couple times
W4QO.jim :: w2fmu, what kind of wx instrumentation do you have that can put all that on your web site?
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k4bb :: so long
k4bb :: A Faraday cage is capable of completely stopping an attack using electromagnetism such as an EMP.[
k4bb :: v
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W4QO.jim :: d
Tuesday, 13 May 2008
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