[Gllug] Faraday Cage

[Chris Bell]

On Fri 16 May, t.clarke wrote:

> I seem to recall reading somehwere that this faraday cage thing only works
> if the aperture size of the holes in the cage are smaller than the wavelength
> of the RF energy  - so mobile phones will still work in jail/gaol cells ??
> 
   Broadcast transmitters are not usually switched off, so aerial
maintenance must continue with perhaps 500KW going up the pipe. They are
usually designed to look like a hollow tube with all the RF outside and a
theoretical zero field up the middle. Everyone and everything had to go up
through the tube during work to add an additional section on top, but a sack
of bolts being hauled up on the end of a rope did not understand the theory,
and the sack nearly burnt through by the time it could be grabbed from
above. There was a fair drop down to the ground, with other people working
below.

-- 
Chris Bell



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