[Richard Webb[_3_]]

On Sat 2012-May-19 01:15, Bob writes:

That's what amazes me the most about this. The very things
that are your best protection are "good engineering
practice" anyway.

The energies predicted by a Carrington event, or an engineered
nuclear EMP event are so large, even 10 feet of wire can have a very
large induced voltage. In DoD studies, it was found that such things
as artillery gun barrels could pick up 600V potentials between the
ends. In the case of nuclear induced EMP, rise times of GHz
radiation are so fast, pulses get past shunt diodes, making consumer
and regular industrial surge protectors useless.

Pretty much so. But, if you follow good engineering
practice you're more likely to be able to take steps if
you've gotten some warning anyway. Note your point on any
wire connecting devices being an antenna. PEople forget
that in all parts of this life, that cable connecting those
two devices together is a perfect antenna g.

If you ever get the warning -- and both DoD and NASA have satellites
for launches and flares respectively, there is something you can do,
provided you take care of the issue of bodily harm first:

1. Unplug everything from everything: data, power, video, audio. 2.
On every box that has been unplugged, detach all the cables. Every
cable is an antenna for EMP.
3. EMP is a concentrated phenomena. NASA has some capability to
geographically localize the point of highest intensity. Ditto for DoD
with high altitude nuclear detonations. If you are in the bulls eye,
the above is not enough. Put the "must have" stuff, which should be
battery operated, since you won't have power for a while, in a
galvanized trash can and put the lid on. And stay away from metal.
When a nuclear EMP hits, the ends of a screen door could be lethal.

I am prepared to perform steps 1 and 2, but I don't have a metal
trash can

NOte somebody else said Tru Value hardware, lowe's has 'em
too. Get one! I've got one for just such a purpose g.
YEah I know, some folks use 'em for animal feed, I've got a
plastic bin with a tight fitting lid, on small plastic
wheels even for dog food. But yes, in this we've got some
battery operated devices, or can put them in there if we've
received warning. We're also big on those human powered
radios and flashlights. My xyl has one near her usual
position in the living room ready to hand, I've one in the
shack here, and there's a human powered flashlight in one fo the drawers in the remote truck. We've also two of those
human powered bc band receivers running around. One right
by the bed, the other in the radio room here.

IF I get fair warning, one of the hf transceivers will go in its box, the box wrapped in foil then stowed in the metal
can, same with some vhf/uhf gear, flashlights, etc. It
along with the grab 'n go trunk mean for two trips to the
van if we've got to bug out, two trips for me with stuff,
one trip with Kathy in wheelchair.


Regards,
Richard
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[Don Pearce[_3_]]

On Sun, 20 May 2012 11:44:18 -0400, "Soundhaspriority"
wrote:



"Richard Webb" wrote in
message ...
[snip]

IF I get fair warning, one of the hf transceivers will go in its box, the
box wrapped in foil then stowed in the metal
can, same with some vhf/uhf gear, flashlights, etc. It
along with the grab 'n go trunk mean for two trips to the
van if we've got to bug out, two trips for me with stuff,
one trip with Kathy in wheelchair.

Sounds good. One more thing: an EMP event is a good time to own a diesel,
not the new electronic diesels, but the old clattery type with prechambers.
No delicate circuitry, just a starter, glow-plugs, and the fuel-kill
solenoid.

People with engine computers are likely to have some trouble or a lot of
trouble. Some tests indicate that if the EMP merely glitches the computer,
disconnecting the battery for 10 minutes restores it. But a hard kill is
very possible.


Not EMP, I know, but large solar flare events produces vaguely similar
results on a locally smaller, but more widespread scale. In the UK,
the National Grid no longer responds to such events by opening
breakers. To the contrary, they close every switch possible, and
connect the entire grid together. Induced currents now dissipate
widely, and we suffer neither meltdowns or blackouts.

As for EMP busing a PC, there was a science programme on TV years ago
that subjected an old 286 machine (I think) to EMP in a screened
chamber. It died to the extent that it could not recognise its hard
drive. Unfortunately they didn't complete the experiment and move the
drive to another PC to see if it had survived the event.

Foil hats are all we really need - for us and our equipment.

d

[Richard Webb[_3_]]

On Sun 2012-May-20 11:52, Don writes:
IF I get fair warning, one of the hf transceivers will go in its box, the
box wrapped in foil then stowed in the metal
can, same with some vhf/uhf gear, flashlights, etc. It
along with the grab 'n go trunk mean for two trips to the
van if we've got to bug out, two trips for me with stuff,
one trip with Kathy in wheelchair.
Sounds good. One more thing: an EMP event is a good time to own a diesel,
not the new electronic diesels, but the old clattery type with prechambers.
No delicate circuitry, just a starter, glow-plugs, and the fuel-kill
solenoid.

Yep, or maybe old internal combustion engine with just a
magneto or something similar.

Not EMP, I know, but large solar flare events produces vaguely
similar results on a locally smaller, but more widespread scale. In
the UK, the National Grid no longer responds to such events by
opening breakers. To the contrary, they close every switch possible,
and connect the entire grid together. Induced currents now dissipate
widely, and we suffer neither meltdowns or blackouts.

Right, remind folks to unplug their electronics, and let the grid take that "surge" to ground.

As for EMP busing a PC, there was a science programme on TV years
ago that subjected an old 286 machine (I think) to EMP in a screened
chamber. It died to the extent that it could not recognise its hard
drive. Unfortunately they didn't complete the experiment and move
the drive to another PC to see if it had survived the event.

I'd bet not, especially if concentrated enough, realign all
those domains. Format, what format?

Foil hats are all we really need - for us and our equipment.

rotfl


Regards,
Richard
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