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MAKING FARADAY CAGES
United States Action ^ | 4/10/13 | Miles Stair

Posted on 04/10/2013 6:45:54 AM PDT by Mr. K

The reality of protecting all electronic equipment against EMP from a nuclear explosion over our shores is becoming imminent. We now live in perilous times.

The information to follow on building "Faraday cages" is timely indeed. A single atmospheric nuclear detonation releases enough electromagnetic pulse (EMP) to equal 100,000 volts per square centimeter on the ground. A single detonation 200 to 400 miles over the center of the continental United States would fry every unprotected computer chip from coast to coast, and from the middle of Canada to the middle of Mexico. And we are now into Solar Cycle 23, with solar flares common and expected to continue until the first of next year. CME's are capable of extreme damage to modern computerized equipment! Sure, we have our windup BayGen radio's and spare lap top computers, but unless electronic equipment is protected from an electromagnetic pulse, they will be fried!

When Einstein and the others first refined and purified uranium, they took time off and studied its properties. That is when they discovered the "rays" that were harmful, as well as the phase transformations. In the course of their work, one of the scientists discovered that simply covering an object with a grounded copper mesh would stop virtually all electromagnetic radiation, whether proton or neutron. Obviously, they had to protect their monitoring equipment! Thus was born the "Faraday cage."

The copper mesh, like 1 inch chicken wire, worked well in large uses, like covering buildings, and it is still in use today: FEMA headquarters buildings are dome-shaped earth-bermed structures, and under the earth is a copper mesh that extends out from the base and is secured by grounding rods.

As an Electro Magnetic Pulse (EMP) travels to earth, whether from a Coronal Mass Ejection (CME) or a nuclear detonation in the atmosphere, it hits and runs along electrical power lines as well, building up voltage and amperage, which is what happened during the last solar storm a dozen years ago, blowing out transformers and leaving 6 million people in eastern Canada without power for weeks.

To prevent that problem, if you have a hard-wired generator, the wiring from the generator to the house should run in conduit that is grounded. The generator itself can have the frame grounded for added insurance, but that ground wire MUST be insulated and run to a different ground rod well away from the ground rod for building and conduit!

With radio's and smaller appliances, a Faraday cage can be built by using two cardboard boxes: one should fit tightly inside the other, and the item to be covered should itself fit reasonably well inside the smaller box. That is about the most work involved--finding the right size boxes! The outer box is then covered with aluminum foil or Mylar, as from a cheap "space blanket." A grounding wire is then taped to the foil. I then cover the foil with black 6 mil plastic, taped securely in place, to protect the foil from ripping. At the end of the ground wire I attach a cheap small alligator clip from Radio Shack. The item to be protected is placed inside the inner box, which acts as insulation from the outer box, and any EMP hitting the foil and is bled away by the ground wire.

Some medium sized electrical equipment can also easily fit into boxes covered with foil for EMP protection. My laptop computer, for example, fits easily into a Faraday box made from a box that held reams of paper: the entire lid is removable, allowing easy access to the laptop in its case, but is safely stored when not in use.

For larger items which cannot be boxed, such as living room TV sets, etc, I tape a Mylar space blanket to a piece of 6 mil black plastic sheet, using double-sticky tape every foot or so to make sure the Mylar stays in place (it is slippery). I leave a 2 inch edge of black plastic showing all around the space blanket, and while taping down the edges I put on a short lead of ground wire. When it appears that EMP or CME's are on the way, the blanket can be draped over the appliance, the alligator clip attached to a small, unobtrusive ground wire behind the cabinet, and any electromagnetic radiation will be diverted to the ground wire. Very cheap, simple, and once done, items can be "draped" for protection very quickly indeed. And the plastic blankets fold up neatly for storage, ready for use when needed.

The time to build Faraday cages or blankets is NOW, as when they are actually needed it will be far too late. Each box should be labeled on the ends and the top for the exact appliance they were built for, to eliminate any confusion when they must be protected in a hurry. Any electrical appliances not in use should be stored in the Faraday cage, where they will be kept clean, neat, in a known location, and protected against any sudden EMP surge.


TOPICS: Chit/Chat; Conspiracy; Miscellaneous; Science
KEYWORDS: emp; empattack; faraday; faradaycages; northkorea
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There is MORE information at the link that is worth reading.

Someone asked about Faraday Cages and EMP - This is probably very useful information for preppers and freepers.

It won't do you any good to have a generator to run your electronic equipment after the SHTF if it is all fried.

1 posted on 04/10/2013 6:45:54 AM PDT by Mr. K
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To: Mr. K

2 posted on 04/10/2013 6:50:28 AM PDT by thackney (life is fragile, handle with prayer)
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To: Mr. K

Even so, most comm will be down.

The internet will be toast.

The only thing you’ll be able to do with your farraday-protected computers is play video games. By yourself.

Nevertheless, I’d rather have what I don’t need than to need what I don’t have.


3 posted on 04/10/2013 6:52:05 AM PDT by Westbrook (Children do not divide your love, they multiply it.)
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To: Mr. K
he wiring from the generator to the house should run in conduit that is grounded

This would require non-aluminum metal conduit, correct?

4 posted on 04/10/2013 6:52:21 AM PDT by thackney (life is fragile, handle with prayer)
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To: Mr. K

OK so you make your Faraday cage and put your cell phone, radio, and electrical appliances in it. Then along comes the EMP and fries all the cell towers, radio transmitters, and electrical generating stations. So...whaddya got?


5 posted on 04/10/2013 6:52:23 AM PDT by DoodleDawg
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To: Mr. K

While the EMP threat is real, methinks that field strength is Volts/meter...not volts/square centimeter.

And 100k volts per centimeter would be a pretty good field...one which is more than enough to have lightning bolts flash out of the blue. One wouldn’t have to worry about EMP, since we’d all be electrocuted anyway.

Just thinkin’.


6 posted on 04/10/2013 6:52:56 AM PDT by Da Coyote
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To: Mr. K

If you toss a blanket like this over your appliances the grounding wire can be inserted into the grounding prong in a 3-prong electrical outlet- not as good as a nice copper rod driven into the ground outside but way better than nothing.

GROUNDING is very important - if your house is not 100% 3-prong electrical outlets WITH EXCELLENT GROUNDING then it is as good as having nothing.

Your water pipes are usually really good grounds too.

I am not an electrician, I dont even play one on TV, so if there are any here PLEASE correct me if I have gotten anything wrong.


7 posted on 04/10/2013 6:53:54 AM PDT by Mr. K (There are lies, damned lies, statistics, and democrat talking points.)
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To: Mr. K

Put your cell phone in the microwave oven.

Or your butt.

Both, if they’ll fit!


8 posted on 04/10/2013 6:54:09 AM PDT by djf (Rich widows: My Bitcoin address is... 1ETDmR4GDjwmc9rUEQnfB1gAnk6WLmd3n6)
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To: thackney

I dont think so- I think Aluminum is a good conductor
(PLEASE CORRECT ME ANYONE IF I AM WRONG)


9 posted on 04/10/2013 6:55:04 AM PDT by Mr. K (There are lies, damned lies, statistics, and democrat talking points.)
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To: Mr. K

Please don’t misunderstand this reply. I think considering how to prep for an EMP or Solar event is very wise. What I don’t understand is the logic of trying to protect a generator that will require fuel which will quickly become unavailable following any event that takes out major power distribution facilities, transformers, etc.

Why try to protect a TV? I do think it makes sense to have rechargeable batteries, a solar system to provide some basic recharge system, a solar water pump, etc.


10 posted on 04/10/2013 7:00:05 AM PDT by Gadsden1st
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To: Mr. K
I dont think so- I think Aluminum is a good conductor (PLEASE CORRECT ME ANYONE IF I AM WRONG)

Aluminum is a very good conductor of electricity, just not quite as good as copper.
11 posted on 04/10/2013 7:00:22 AM PDT by ZX12R (Never forget the heroes of Benghazi, who were abandoned to their deaths by Obama)
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To: Mr. K

Interesting question. I have also read that grounding is not advised as the ground is the source of the surge.


12 posted on 04/10/2013 7:02:10 AM PDT by Gadsden1st
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To: Mr. K
Use a metal garbage can. It can hold a lot of stuff.
Wrap "whatever" in a blanket, and just put it in the can with a lid.
"Non-electric" radios and flash lights are wind up. They'll still work if protected. Anything using batteries can be saved for entertainment, because the shock of no electric won't be easy for a lot of people.

We've bought a lot of non-electric stuff from Leihmans nonelectric store. It's saved us a number of times when the electric goes out because of a northeaster, or an appliance breaks. The nonelectric back up comes in handy.

13 posted on 04/10/2013 7:04:56 AM PDT by concerned about politics ("Get thee behind me, Liberal")
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To: Mr. K

A single atmospheric nuclear detonation releases enough electromagnetic pulse (EMP) to equal 100,000 volts per square centimeter...

I don’t think this guy knows what he is talking about. The bomb releases a magnetic pulse that is NOT electrical. The moving magnetic wave creates electricity in conductive metals. Antennas are perfect for generating an electrical pulse that can destroy things. The voltage would be dependent on the strength of the magnetic pulse.


14 posted on 04/10/2013 7:12:52 AM PDT by mountainlion (Live well for those that did not make it back.)
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To: concerned about politics

I’ve heard the trash can thing works pretty well. For some reason it’s said to line the can inside with cardboard.


15 posted on 04/10/2013 7:22:25 AM PDT by MachIV
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To: Mr. K

But it is not magnetic. It may keep an electric field from passing but not a magnetic.


16 posted on 04/10/2013 7:26:12 AM PDT by thackney (life is fragile, handle with prayer)
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To: Mr. K

His laptop?

Really?

He goes through all of that packing and unpacking before and after every use?

These measures only make sense for infrequently used or Emergency Use Only type items.


17 posted on 04/10/2013 7:28:20 AM PDT by G Larry (Darkness Hates the Light)
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To: Mr. K

Water pipe grounding assumes a metal pipe going into the ground from your house. I know for a fact my source lines are plastic. No joy.


18 posted on 04/10/2013 7:29:47 AM PDT by MrB (The difference between a Humanist and a Satanist - the latter admits whom he's working for)
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To: Mr. K

For smaller electronics, the easiest Faraday cage is a metal trash can that has no holes in the outside. Ground the trashcan with a metal rod and a connecting wire. Put a non conductive rubber mat in the bottom and around the sides so that nothing can touch the metal. Put your sensitive electronics inside.


19 posted on 04/10/2013 7:31:41 AM PDT by taxcontrol
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To: thackney; All

“This would require non-aluminum metal conduit, correct?”

First of all, conduit is not made out of aluminum, It’s made out of galvanized thin wall iron pipe. Aluminum is actually a better conductor but it is too expensive and corrodes too easily.

Secondly, a grounded sheet stops an electrostatic field, but it is not in itself a “Faraday cage”. A Faraday cage actually doesn’t have to be grounded to be effective so long as the item to be protected including the power cords etc., are within the cage.

The Faraday cage works on the principal (discovered by Faraday), that an electric field inside of a conductor will always be zero because the electrons inside the metal always move in such a way as to always cancel the external field.


20 posted on 04/10/2013 7:32:30 AM PDT by babygene ( .)
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To: DoodleDawg

“So...whaddya got?”

The only Angry Birds game in town... make the addicts line up and pay one can of tuna per game.


21 posted on 04/10/2013 7:35:53 AM PDT by Boogieman
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To: Mr. K

bookmark


22 posted on 04/10/2013 7:36:24 AM PDT by nanetteclaret (Unreconstructed Catholic Texan)
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To: MachIV
-- For some reason it's said to line the can inside with cardboard. --

saltnprepper.com/faraday-cage

The cage itself will have a (voltage) potential from one location to another (on the cage), which is why inside the cage is electrically silent. The carboard is an insulator between the goods you want to protect, and the conductive cage.

Grounding the cage is unnecessary.

23 posted on 04/10/2013 7:37:11 AM PDT by Cboldt
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To: Gadsden1st

” I do think it makes sense to have rechargeable batteries, a solar system to provide some basic recharge system, a solar water pump, etc.”

Solar cells are huge semiconductors with a P/N junction similar to a diode and would be the first thing to go if they were on your roof.


24 posted on 04/10/2013 7:37:22 AM PDT by babygene ( .)
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To: Mr. K

“space blanket.”

I might start buying them again just for this.

They make lousy blankets.


25 posted on 04/10/2013 7:37:50 AM PDT by BenLurkin (This is not a statement of fact. It is either opinion or satire; or both)
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To: Mr. K

My 67 Chevy should still run, but of course all the gas pumps are now fully electronic so I’m still hosed....


26 posted on 04/10/2013 7:37:52 AM PDT by nascarnation (Baraq's economic policy: trickle up poverty)
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To: Gadsden1st

“What I don’t understand is the logic of trying to protect a generator that will require fuel which will quickly become unavailable following any event that takes out major power distribution facilities, transformers, etc.”

If it’s a diesel generator, then you can probably run it on biodiesel, or even ethanol, that you could produce yourself. That will probably lessen the lifetime of the generator, but it’s better than no power at all.


27 posted on 04/10/2013 7:38:29 AM PDT by Boogieman
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To: Mr. K

We have a 4 drawer metal filing cabinet which we plan to use as a faraday cage. It will work just fine as will a metal 30 gallon trash can. Also if your car is in the garage and you ground it with a piece of chain or something hanging off the bumper chances are it will start again after an EMP.


28 posted on 04/10/2013 7:38:43 AM PDT by Georgia Girl 2 (The only purpose of a pistol is to fight your way back to the rifle you should never have dropped.)
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To: babygene
conduit is not made out of aluminum, It’s made out of galvanized thin wall iron pipe.

Conduit comes in aluminum, steel (RGS), and plastic.

http://www.grainger.com/Grainger/ALLIED-Conduit-5GUL3?gclid=CI6_1YCqwLYCFZE-Mgod8zMAWA&cm_mmc=PPC:GooglePLA-_-Electrical-_-Conduit-_-5GUL3&ci_src=17588969&ci_sku=5GUL3&ef_id=CHFP9YhlW1EAAF@E:20130410143837:s

The Faraday cage works on the principal (discovered by Faraday), that an electric field inside of a conductor will always be zero because the electrons inside the metal always move in such a way as to always cancel the external field.

I realized after I posted that copper mesh is an effective Faraday cage, so the magnetic field alone must not be an issue. Thanks for information.

29 posted on 04/10/2013 7:40:48 AM PDT by thackney (life is fragile, handle with prayer)
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To: Mr. K

“I dont think so- I think Aluminum is a good conductor”

Aluminum foil acts as a farday cage. Ex: Turn off your cell phone and wrap it in aluminum foil and it will survive an EMP. Paper a closet with aluminum foil top to bottom and it becomes a faraday cage.


30 posted on 04/10/2013 7:41:32 AM PDT by Georgia Girl 2 (The only purpose of a pistol is to fight your way back to the rifle you should never have dropped.)
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To: Mr. K

We have had three EMP solar strikes since the late 1800’s. Cover your gen’s with foil. Try using the original box, if possible. Use tape to secure the edges. Learn to protect your fuel source, by being a bit smart. Energy will be your main concern- after water storage and food storage. Get the clue. It is not that hard to prep, just a bit.


31 posted on 04/10/2013 7:42:53 AM PDT by RedHeeler
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To: mountainlion

“The bomb releases a magnetic pulse that is NOT electrical.”

This is not correct. EMP stands for electro magnetic pulse. Electric pulses do not propagate by themselves and neither do magnetic pulses. Combined, the wave travels at the speed of light in a vacuum. Spark a wire across a battery and you will hear it on an AM radio. That’s the kind of pulse were talking about, only millions of time larger.


32 posted on 04/10/2013 7:46:13 AM PDT by babygene ( .)
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To: Georgia Girl 2

“Aluminum foil acts as a farday cage. “

How about my Airstream travel trailer?


33 posted on 04/10/2013 7:50:46 AM PDT by Soul of the South (Yesterday is gone. Today will be what we make of it.)
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To: Mr. K
100,000 volts per square centimeter on the ground.

You know, for an article that purports to be authoritative, it has the wrong units for electric field. It makes you wonder what else is wrong. Probably a lot.

It's volts per meter, not volts per square area.

I suspect these people are just copying and pasting stuff, and know nothing about actual RF engineering. This is my field.

34 posted on 04/10/2013 7:53:41 AM PDT by backwoods-engineer (Blog: www.BackwoodsEngineer.com)
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To: Mr. K
When Einstein and the others first refined and purified uranium, they took time off and studied its properties. That is when they discovered the "rays" that were harmful, as well as the phase transformations. In the course of their work, one of the scientists discovered that simply covering an object with a grounded copper mesh would stop virtually all electromagnetic radiation, whether proton or neutron.

This is not even coherent enough to be wrong. It is virtually meaningless, like something sent repeatedly through "Google Translate."

Regards,

35 posted on 04/10/2013 7:56:04 AM PDT by alexander_busek (Extraordinary claims require extraordinary evidence.)
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To: Soul of the South
I'll bet an Airstream would offer quite a bit of EMP protection, as would any all-metal structure... just gotta insulate the electronics from the outer skin.

I suspect the roll-type radiant barrier material would help protect electronic gear inside houses, too - at least the stuff that's not plugged-in to power outlets or antennas. I know it'll block RF well enough to silence an attic-mounted shortwave antenna.

36 posted on 04/10/2013 8:04:35 AM PDT by Charles Martel (Endeavor to persevere...)
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To: concerned about politics

We put a motorola reserve charge/battery pack for my kids tablets in our tornado room and it allows the kids to play their games (and remain calm) when the power is out. Have had to use it once and am glad we had it.

Entertainment for kids is often overlooked.


37 posted on 04/10/2013 8:10:06 AM PDT by IllumiNaughtyByNature ($1.84 - The price of a gallon of gas on Jan. 20th, 2009.)
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To: Charles Martel

My problem is that even if I prep well, I am dependent on hormone replacement drugs to live due to cancer surgery. My life expectancy is about 30 days after I take the last pill. Unfortunately the government will not permit me to obtain more than a 30 day supply on a refill because this medicine is abused by trainers and athletes. Therefore, if we have an EMP attack, and services are not restored quickly (which they won’t be), I’ll certainly be a casualty.


38 posted on 04/10/2013 8:15:40 AM PDT by Soul of the South (Yesterday is gone. Today will be what we make of it.)
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To: Mr. K

You don’t know what you’re talking about.

You haven’t built a ‘Faraday cage’. You have built a shielded enclosure.

Click on name for further info ..


39 posted on 04/10/2013 8:16:18 AM PDT by _Jim (Conspiracy theories are the favored tools of the weak-minded.)
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To: babygene

I had a solar panel to provide trickle charge to my boat battery. Lighting strike caused diod to blow and actually melted leads where they connected. No other damage to electrical systems. Always wondered if the charge from the strike did it, or if the flash was so bright it generated a spike of current from the panel that caused it. Replaced the diod and all was well.

If I had panels for SHTF, I think I would try to protect them and not mount them till after the event.


40 posted on 04/10/2013 8:17:35 AM PDT by Gadsden1st
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To: thackney

“Conduit comes in aluminum, steel (RGS), and plastic.”

Your right about the plastic, It’s actually gray PVC. Of course it doesn’t conduct at all so it would do no shielding.

Also, you will find that a conductor will also shield a changing magnetic field (like a pulse). A moving magnetic field will induce electric current in the metal (eddy currents) and the current combined with the resistance in the metal will produce heat. Think of those counter-top electric ranges that heat up a metal pan yet are cold to the touch.


41 posted on 04/10/2013 8:17:49 AM PDT by babygene ( .)
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To: babygene
My training is not up to date. Nuclear weapons were assumed to be used on the ground where the electrical component dissipates like lightning. The magnetic pulse dissipates with distance on the order of the square root or cube root. Air burst was not expected in my CBN training. I don’t think I am in a target area and am protected by terrain so I never got interested in studying it. In a reinforced concrete building the electrical component would be gone so all they worried about was the magnetic induction.
42 posted on 04/10/2013 8:17:52 AM PDT by mountainlion (Live well for those that did not make it back.)
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To: Soul of the South

“How about my Airstream travel trailer?”

Good idea.


43 posted on 04/10/2013 8:21:55 AM PDT by Georgia Girl 2 (The only purpose of a pistol is to fight your way back to the rifle you should never have dropped.)
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To: babygene
Your right about the plastic, It’s actually gray PVC.

Gray PVC is the most common but not the only non-metallic conduit available. Some facilities will run different colors for different circuits, such as light blue for intrinsically safe circuits. I have also installed black fiberglass conduits as well.

I have used the aluminum in industrial facilities in areas not likely to be damaged by moving equipment, but only at the client's request. It is not my preference.

44 posted on 04/10/2013 8:23:38 AM PDT by thackney (life is fragile, handle with prayer)
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To: Mr. K

Something that everyone should consider in regards to EMP are safes. Do you own a gun safe? Is the lock electronic or mechanical?

If you have a gun safe full of your SHTF weaponry, and EMP fries the electronic lock just when you need access to them, that might be a problem.

I’ve noticed that one of the manufacturers is now offering safes with electronic locks that have a manual backup/override, so I’m not the only one thinking about this.


45 posted on 04/10/2013 8:24:31 AM PDT by Disambiguator
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To: Soul of the South

” Unfortunately the government will not permit me to obtain more than a 30 day supply on a refill because this medicine is abused by trainers and athletes.”

I have the same problem with my spouse’s medication. I suggest you abuse the system yourself and get extra. In our case we get a 90 day supply by getting the Med’s by mail.


46 posted on 04/10/2013 8:27:04 AM PDT by babygene ( .)
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To: backwoods-engineer
You know, for an article that purports to be authoritative...

I have reservations about this guy also. It seems he assumes you will be at ground zero of the blast. I have worked at hardened commutations places that seem to have a different take. I don’t think the 1” chicken wire would shield much high frequency. Some electronic places were wallpapered with solid copper with soldered seams for shielding. I suspect that the truth would be more classified information and that what we hear is more conjecture.

47 posted on 04/10/2013 8:28:14 AM PDT by mountainlion (Live well for those that did not make it back.)
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To: reed13

bfl


48 posted on 04/10/2013 8:30:15 AM PDT by reed13k (For evil to triumph it is only necessary for good men to do nothing.)
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To: Soul of the South

Good idea with the Airstream. You’d want to have conductive screens or covers over the windows. Not sure how much energy could get through the floor.


49 posted on 04/10/2013 8:31:08 AM PDT by Rio (Tempis Fugit.)
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To: _Jim
"You don't know what you are talking about"

I CLEARLY stated that I was not an electrician and that someone with electrical knowlege should PLEASE correct me if i was wrong.

You may know what you are talking about but you certainly could use a lesson or two in polite discourse.

a$$ hole.

50 posted on 04/10/2013 8:33:00 AM PDT by Mr. K (There are lies, damned lies, statistics, and democrat talking points.)
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