alt.engineering.electrical

In article < @ >,
Wilsc0mbe@ says...
> On Jul 27, 5:51 am, inva...@ (Beachcomber) wrote:
> > On Thu, 26 Jul 2007 16:35:59 -0400, krw wrote:
> > >In article <46a8f547$0$4723$4c368...@ >,
> > >diddlywh...@ says...
> > >> Hi,
> >
> > >> How would one protect certain items against any type of EMF attack, either
> > >> an EMF weapon or residual from a nuke.
> >
> > >> not big items, but a radio, small solar panel, vehicle electonics etc.
> >
> > >> can they be stored underground in some type of container.
> >
> > >Sure, in metal cans (or under tin-foil hats).
> >
> > I once worked at a commecial radio transmitter were they concerned
> > about this stuff during the 60's. Many stations even received
> > government funds for this if they happened to operate on the
> > designated 'hardened' frequencies.
> >
> > The general idea was heavy duty surge arrestors everywhere (similar to
> > lighting arrestors), generous spacing between components, and putting
> > critical electronics in a more-or-less sealed up copper 'Faraday
> > Cages' with surge protection on every incoming and outgoing line.
> > Sometimes entire rooms were lined with copper. Also, lots of stuff
> > was de-rated ( . using 1 or 2 watt resistors when 1/4 watt was
> > called for in the circuit design, humongous over-rated power
> > capacitors, etc.).
> >
> > Every one of these stations had an emergency AM radio with the old CD
> > triangle logo over what were called the Conelrad Frequencies.
>
> My understanding is that electrical equipment that is not "live" at
> the time of the EMF attack would not be affected. It would be wise to
> have any necessary batteries disconnected. Burying the items would
> serve no purpose, other than security.

Not true. Disconnected devices are still sensitive to high EMF
fields.

--
Keith