curious and curiouser...

[wb5mmb]

A 7.5 mb down load but interesting reading 
<http://www.empcommission.org/docs/A2473-EMP_Commission-7MB.pdf>A2473-EMP_Commission-7MB.pdf 
(application/pdf Object)
      Sandy
     WB5MMB


At 03:50 PM 10/29/2009, Brian Hawes wrote:
>The greatest threat to electrical equipment is not from ionising radiation but
>from an intense electromagnetic energy pulse produced by a 
>high-altitude nuclear
>detonation. The induced emf can destroy equipment over a whole continent. A
>nation needs only one bomb and one ICBM to criple an oponent.
>The risetime is a few nano-seconds and it's difficult to see what a built in
>device could do to help especially as equipment doesn't have to be switched on
>for induced voltages to take effect. Military hardened equipment 
>goes into steel
>enclosures which look like big safes.
>
>http://www.fas.org/nuke/intro/nuke/emp.htm
>
>I think I'll just dig a hole in the ground, get in, and cover myself 
>with straw.
>Leaves the place tidy.
>
>Brian
>G2KQ
>
>In message <4AE98B30.6090505 at ccr.org> "Mike O'Dell" <mo at ccr.org> writes:
> > Dan Romanchik KB6NU wrote:
> > > That's kind of amusing. It brings to mind several questions:
> > >
> > > 1. How do they test the device?  I would presume with some low-level
> > > radiation source, but I'd wonder how that translates to operation during
> > > a nuclear event, when supposed the levels would be much higher.
> > > 2. Is removing power from electronic devices actually going to protect
> > > them?
> > > 3. If so, can power removed quickly enough to prevent damage.
> > >
> > > 73!
> > >
> > > Dan KB6NU
> > > ----------------------------------------------------------
> > > CW Geek, ARRL MI Section Training Manager
> > > Read my ham radio blog at http://www.kb6nu.com
> > > LET'S REALLY MAKE THE ARRL THE NATIONAL ASSOCIATION FOR HAM RADIO
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > On Oct 28, 2009, at Oct 28,8:13 PM, Mike O'Dell wrote:
> > >> Now here's something you don't see every day, Chauncey.
> > >>
> > >> What's that, Edgar?
> > >>
> > >> An integrated circuit "Nuclear Event Detector".
> > >>
> > >> A WHAT?
> > >>
> > >> An integrated circuit "Nuclear Event Detector".
> > >>
> > >>
>http://www.cmac.com/news-and-literature/press-releases/documents/NEDV1.2Jun09.pdf 
>
> > >>
> > > _______________________________________________
> > > Tacos mailing list
> > > Tacos at amrad.org
> > > http://www.amrad.org/mailman/listinfo/tacos
> >
> > i assume it's lifting the power to the boards
> > so the EMP suppression on the box connectors
> > has a better chance of saving the bacon.
> >
> > the gamma and x-ray flux arrives much faster
> > than the EMP because the MHD effects have to get
> > spun-up to generate the EMP.
> >
> > i also assume the systems being protected are
> > "sufficiently removed" from the "event" that
> > any of this matters.
> >
> >       -mo
> >
> > ps - i would guess testing is done with an x-ray machine
> >
> > _______________________________________________
> > Tacos mailing list
> > Tacos at amrad.org
> > http://www.amrad.org/mailman/listinfo/tacos
>_______________________________________________
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