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Zombie Apocalypse Survival CampFamily friendly environment and knowledgeable instructors willing to help you learn the skills necessary to survive the zombie apocalypse. This seems to be a really good article about the real and imaginary dangers of various EMP events.
Electromagnetic pulse (EMP) is generated usually when a nuclear device is detonated in the upper atmosphere. The most important concept is wave physics, or the frequency and wavelengths of the EMP waves.
Incidentally, this also explains why, if you search the internet, you can see government buildings use 1-inch copper mesh. EMP doesn’t correlate with yield – any nuke can generate an EMP, so “rogue states” can do it – and in fact, some have tested missiles apparently optimized for EMP.
Our testing has shown that the best materials are copper and stainless steel for shielding purposes. For all practical purposes, material thickness is irrelevant for EMP (almost any available material is thick enough).
We also wanted to talk about some of the newest known tactical energy weapons out there and how to counter them. Boeing CHAMP Missile – This missile is supposed to create a high-powered microwave (HPM) that disrupts electronics within a single target building. Active Denial System – This military program is another HPM device, operating on the 95 gigahertz frequency.
NATO EMP – This device was unveiled recently – it just made the news within the past two months. As you can see, the major directed energy weapons that are being touted as “next generation” are generally not a material threat – assuming you have done some basic preparations. This entry was posted in Preparedness 101 and tagged EMP, Faraday cage by paadmin.Bookmark the permalink. YES, to an extent, an old microwave oven may be re-purposed as a Faraday cage against EMP (electro magnetic pulse). A Faraday cage by its very definition does not have to be grounded to reflect or keep out electro-magnetic waves (they normally are not grounded). If a microwave oven is used as an EMP shield (Faraday cage),I would suggest that the cord be cut and removed to prevent it from becoming an antenna.
Not a bad idea, but in theory, not necessary given the existing shielding of the chamber itself.
Bought some aluminum attic radiant barrier foil a few years back, it’s like heavy duty aluminum foil with threads inside for strength. I regret to inform you that a microwave oven is only partially effective as a Faraday cage, something you can test for yourself.
In any event, there are better methods of do-it-yourself Faraday cage design, as you mention. I wouldn’t have expected the shielding on a microwave oven to do anything but protect the user from the oven.
If I remember correctly, 1) there is no screen over the magnetron’s output port (duh!) and 2) there is high-voltage DC applied to the magnetron. Go to any old appliance store and buy old single door refrigerator or freezer, , take off the rubber gasket, so that the door metal contacts the main shell, then line the inner walls completely with cardboard or styrofoam, place your electronic on cardboard covered shelves, you can easily store radio’s ,lap tops,etc. A corollary question is this: How would the generator connected to that Automatic Transfer Switch fare in an EMP event? I suspect what has happened is that the microwave manufacturers have cheapened their units, and provide just enough RF protection to keep your eyeballs from being fried. An EMP (electromagnetic pulse) can be created by space weather, like massive solar flares, as well as HEMP weapons.
In a nuclear war it is possible that the first nukes used would be HEMP weapons in an attempt to knock out defenses. As the EMP hits the faraday cage, the energy travels around the outer metal material but not through the insulator. Batteries should not be effected by an EMP but might be useful stored with your electronics for easy access. If you have certain individual electronics you use regularly and want to add a level of protection, consider buying small faraday bags. This entry was posted in How To and tagged electromagnet pulse, electronics, emp, faraday cage, grid down, hemp weapon on November 6, 2013 by Michael. Please note that all modern Lithium Ion batteries have management electronics built in, and thus be vulnerable to an EMP.
Legal NoticeThe contents of this website are provided for informational purposes only and should not be construed as professional, legal, or financial advice. Of all of the reasons to prepare, one that we all need to take seriously is the possibility of a catastrophic EMP, or electromagnetic pulse. To be blunt about it, an EMP, if large enough, would affect the entire planet.A  In an instant, civilization as we know it would change as we get swept backward in time by a century or two. So what would life be like following a massive EMP event or episode?A  There would be no power, no transportation systems, no communication systems, no banking, no internet, and, no surprise, no food and no water delivery systems.A  This would truly be an End of The World As We Know it situation.
How would you keep yourself healthy if sanitation systems were no longer functional and medicine could no longer be manufactured. An electromagnetic pulse could potentially fry the vast majority of all the microchips in the United States. With that introduction, today I would like to introduce you to the Faraday cage, and further, how toA build a simple Faraday cage. More elaborate structures can be custom built from sheet metal but for the home user, why bother?A  As a matter of fact, I suspect that wrapping your devices in plain, ordinary, aluminum foil will work as well. Factoid: Faraday cages are named after English scientist Michael Faraday, who invented them in 1836.
In my research I read that a microwave oven, new or used,A  can be used as an effective Faraday cage.A  On the surface, that seems logical since, by design, a microwave oven keeps the energy it creates confined to the interior which likewise, should prevent strong electrical pulses from getting back inside. Granted, cell phones operate at various radio frequencies so while one cell phone may not work, another one will.A  Still, with this being so easy to test, why chance it?
Aside from calling a cell phone, you can test your homemade Faraday cage by putting a portable radio inside the shield after tuning it to a strong FM station.A  If you can hear the FM station while the radio is inside your Faraday cage, then you need to go back to square one to ensure your shield is properly sealed.
I asked my friend George UreA to comment and to offer his perspective on Faraday cages since EMP preparedness is something he covered in-depth on his subscriber site, Peoplenomics ($40 a year but worth it for the technical information on the many topics he covers.). So, a quick inspection of the EMP failure modes, George offers, is one way to build a list of items to put in your Faraday cage. He also told meA some personal research hea€™s done that seems to indicate that about 90% of cars will continue to operate after an EMP event of moderate size. The equipment you store in a Faraday cage should encompass those devices that will help you communicate with the world following a devastating loss of the grid.
Multiple 2 meter and 440 MHz ham radios (such as the portable Baofengs), again with charging cables and solar power adapters.
A laptop computer with a fresh battery, a charger, solar adapter, and all the key software on CD so if you need to bring up a fresh copy of the operating system, youa€™ll have the product key and then any prepping articles or references you might need. High-capacity USB thumb drive holdingA  pertinent financial information including past year tax records, scanned copies of birth certificates, passports, marriage licenses, deeds, vehicle registrations and medical records.
George also recommends simple insulation for your electronics, so that units do not touch each other, He uses low tech insulation: a combination of cardboard and bubble-wrap works well.


Imagine that an EMP is a tidal wave.A  If it approaches a full reservoir (electricity and current) it can keep going.
There are hints of this in the article Electromagnetic Pulse Protection by Jerry Emanuelson. Should a massive EMP occur, stores wona€™t be open, credit cards wona€™t work, and the gas you have in your car may be all the gas youa€™ll ever have for months or even possibly years. Will the DIY Faraday cage work?A  It is speculation to say for sure.A  My own research plus my limited understanding of electronics tells me it will, but this premise will remain unproven until an actual EMP event occurs. The bottom line is that I hope a catastrophic EMP never happens.A  But if it does, I want to be ready to fend for myself without electronics.
I would like to acknowledge my George Ure for his assistance with this article.A  His research and first hand experience with Faraday cages, along with his perspective, is appreciated. If you enjoyed this article, consider voting for Backdoor Survival daily at Top Prepper Websites!A  In addition, SUBSCRIBE to email updatesA  and receive a free, downloadable copy of my e-book The Emergency Food Buyera€™s Guide.
Included are broccoli, green peas, tomato chunks, spinach, green beans, and zucchini piecesa€”fantastic in soups, stews, or even in a refreshing salad. You can read about these and other healing essential oils in 20 All Purpose Remedies Using Essential Oils or other articles on this archive page: Interested in Learning About Essential Oils. For an even broader selection of oils consider this Spark Naturals Health and Wellness Kit which includes a total of 10 oils and blends, nicely packaged on a tin that is perfect for your first aid kit.A  And note that with any purchase from Spark Naturals you will enjoy a 10% discount by using code BACKDOORSURVIVAL at checkout.
How to Build a Simple Faraday Cage for EMP Survival by Gaye Levy first appeared on Backdoor Survival. Non-nuclear explosive devices work too but on a smaller scale; even a transformer exploding, as in the movie Small Soldiers, generates a localized pulse. Our focus is on preventing damage in the range of roughly 200 mHz – 1 gHz, mostly the domain of E1. E1 and E2, have much higher frequencies, so they are basically dissipated in the atmosphere by water vapor over a long distance.
Copper is the single best material that is somewhat cost-effective (however, mixed materials, such as silver-coated or copper-coated stainless steel, can perform even better). We will cover the Boeing CHAMP missile, the Active Denial System, Bofors BAE Blackout system, and the recently revealed NATO EMP system. Based on the public video footage (available on Boeing’s web site), we believe counters are relatively simple.
The range is reportedly relatively high – up to a few hundred meters – but the machine is bulky.
It is a vehicle-mountable device that stops cars by interfering with the electronic control systems. Utilities have never been tested against a large scale EMP event – the most recent solar flare that caused major damage was in 1989 in Canada. One EMP could cause almost 200 simultaneous nuclear meltdowns if cooling [for the plants and their co-located spent fuel storage ponds] goes offline.
When civilization fails and the desperate masses begin looting, they will come for your food, water and life-sustaining supplies.
As long as the holes in the screen are smaller than the wavelength of the frequencies you are trying to protect against, screen works just as well as a solid piece of metal. In the case of a nuclear detonation, the electromagnetic pulse consists of a continuous frequency spectrum. Since the holes of the screen mesh of a microwave oven are small compared to the wavelength of the microwave itself, little radiation can leak out.
I do know that cell phones operate at lower frequencies, however I would assume that a microwave shielding would also block lower frequencies by default – since the microwave frequencies themselves are higher and require smaller holes in the screen. Since EMP is nothing more than a high energy RF pulse, any Faraday cage which will shield you from EMP will also shield you from RF. I am also somewhat surprised that the microwave shielding seems to be apparently somewhat ‘tuned’ or restricted?
What I found is that supposedly, a microwave is permitted to radiate up 0.25 Watts of power. High Altitude Electromagnetic Weapons (HEMP weapons) are nuclear weapons that are detonated high in the atmosphere.
This is a frequent topic in many post-apocalyptic novels and something that most of us are aware of, even if we do not completely understand the science.
The problem, he points out, is that with an EMP, the grid is likely to fail, and with that, power transformers will likely fail, along with the supervisory control and data acquisition systems (SCADA) control systems for railroads, power, water, and other utility distribution.
Still, the ultimate prepping device would be a metal garbage can which has the top cover sealed to the bottom of the can with aluminized duct tapeA such as the type found at Amazon, Lowes, Home Depot and other hardware stores.
If the reservoir is empty (no juice), the tidal wave loses energy navigating the reservoir. This price, by the way, is less than my local Ace Hardware store.A  Also available in this larger size 20 Gallon size.
The SunJackA® is able to fully charge its internal battery pack in about 5 hours of direct sunlight, or directly power any USB device.
I earn a small commission from purchases made when you begin your Amazon shopping experience here. This is an easy tool for finding products that people are a€?wishinga€? for and in this way you know what the top products are.A  All you need to do is select the category from the left hand side of the screen.
EMP is comprised of the fast rise-time E1 component, the lightning-type E2 component, and the solar flare type E3 component.
Above 1 gHz, it becomes increasingly more difficult to create damaging waves, although theoretically possible. In other words, for E1 and E2 to be affecting your electronics, your general metro area must have been specifically targeted by an EMP weapon. Apparently, the logic is that a nuke would have to be targeted at that specific area in order for the building to be impacted by E1 and E2 (which require MUCH smaller mesh hole sizes, which increase the cost dramatically).
It is very good for E3, in addition to E1 and E2, but it is also expensive and very fragile. However, if visibility is needed, use many small openings (pinholes) in the material versus a few large ones.
However, it may be the case that you can get a call through (if you are very close to a cell tower) but the shielding is sufficient. It’s touted as a way to safely shut down speeding cars (to prevent car bombs at checkpoints). If these weapons exist and can in fact generate significant E1 and E2 over large regions, they are a major threat. A perfectly timed solar flare has the capability to fry the power grid – perhaps permanently. To protect these, as well as your family and home, you must be able to neutralize the threat.
A Faraday cage is an enclosure formed by conducting material or by a mesh of such material.
Most of the energy is distributed throughout the lower frequencies between 3 Hz and 30 kHz. There are also mesh screens on the sides of the oven cavity, one to protect the oven light while allowing it to shine into the cavity, the other to permit ventilation. The article states that most of the energy will occur below 30 KHz and while I suspect this frequency may depend on the actual type of EMP involved, this is still close enough to the AM band to use an AM radio for testing.


The microwave oven does apparently restrict these frequencies, but the attenuation itself in dB is unclear. You might have the materials lying around in your garage right now – and if not the cost to build one is very low and can sometimes be done in less than 10 minutes. If the box is grounded to the earth (third prong in household wiring or to a metal rod stuck in the ground) it should work better, but this is not required. The reader should seek his or her own legal or financial advice from a qualified professional. Handy while hiking, traveling, or simply keeping in touch with your partner while out shopping. The 7-weather channels are pre-programmed and numbered from 1-7, you can easily and conveniently tune into the stations by adjusting the switch.A  Note that not all emergency radios include the NOAA weather band so this is an important feature. Different things are vulnerable to different components of EMP, so let’s cover what you actually need to know. As wavelength decreases (and frequency increases), eventually you get into microwave territory, so the shell of a solid object starts to absorb the energy, not the interior electronics. One cannot make an EMP with an E1 pulse across the entire continent – the power requirement is beyond even nuclear capabilities. That means that particular nuclear device is NOT targeting anywhere else – so short of nuclear war, the loss of any one single facility cannot significantly impact the US.
Stainless steel blocks higher wavelength RF energy slightly better and is much stronger and cheaper. 100 OPI (openings per inch) balances visibility and protection – we even use it in our products so we can testify to its effectiveness. For your laptop – disconnect cables connected to USB or serial ports, or all ports for that matter. EMP can be analogized like a gunshot sound – without protection, your hearing will be damaged.
The reason for that appears to be that the weapon attacks through the power supply and building wiring In other words, unconnected laptops may well be unaffected . But, based on the data provided, we believe it can be countered with a literal aluminum foil shield or other metal shield. Therefore, we believe that a shield made out of stainless steel, or copper, with relatively small holes (100 OPI) should prevent damage to enclosed devices.
The issue we see is that, given that it does not destroy the electronics of the cars, the strength of the wave transmitted cannot be very high.
A full EMP, not just a solar flare, would have an unknown effect because utilities have never been tested to our knowledge on a full system level, only piece by piece. A microwave oven’s very design is to enclose the electro-magnetic radiation of microwaves, and keep them from getting out. However the first effects of nuclear detonation are the very-high-frequency pulses, in the microwave range, and can work their way into Faraday cages if there are cracks, seams, or vents. Simply tune the radio to the strongest local station and put it in whatever you are testing. Electromagnetic pulses don’t hurt people directly, they just wipe out communications and infrastructure.
However, it IS possible to generate a wide-ranging E3 pulse (due to its much longer wavelength).
Furthermore, within each E3-shielded building, certain rooms ARE shielded to a much better standard to protect the really mission-critical equipment from E1 and E2.
Our testing showed that striking the USB or serial ports – pathways into the electronics of the laptops – made the laptops much more vulnerable. With earmuffs, you can still hear the gunshot, but it’s no longer able to damage your hearing.
As the wave only penetrates the very outer layers of skin, a very thin metal film should be enough to counter this weapon. In other words, it should be relatively easy to, again, use a metal mesh material or aluminum foil to reduce the effectiveness of the device. Utilities themselves acknowledge that cooling systems and fans are relatively easy to affect. It really does seem surprisingly easy to create one out of a few relatively inexpensive materials easily acquired from your local hardware store.
We all know that commercial companies don’t put anything more than what they have to for fear of reducing their profit, so it would reasonable to assume microwave ovens are probably between 40 and 50 dB of shielding. In practice, shielding effectiveness does not always work this way, but this is a “good enough” explanation. The E2 and E3 components are far lower in frequency, with E3 having such a long wavelength that, as long as your devices are not connected to any large conductive lines (like power lines or antennae), and are small, they should not be damaged by E3. With the built-in EMI (electromagnetic interference) shielding inherent in most electronics, using any of these materials is sufficient protection.
The main issue with protective materials is creating a solid seal around an enclosed object. Have a few backups inside Faraday cages (electrical insulation, we’ve found, is actually not very important because the nature of a Faraday cage keeps all the energy on the outside surface of the shield, not the inside. By the same token, no earmuffs will help you if you are standing next to a main battle tank about to fire – you will feel it. Additionally, enclosing electronics within a Faraday cage should enhance protection even further.
Additionally, this system reportedly works only in clear weather – rain or fog apparently reduces the weapon’s effectiveness to merely being a nice warm feeling. As a side note, EMP testing by the US Congressional Commission on EMP showed that most vehicles are either fine or relatively easily repaired in an EMP event, so vehicle shielding is most likely unnecessary – unless these weapons exist.
Normally, that is not a problem, but if the cooling system for a nuclear power plant was disrupted, it could be catastrophic.
I just did this with my microwave and while the signal did get rather noisy, it could still be heard, even with the door closed. Its not bad, but it just isn’t enough to fulling attenuate the AM station to the point that it is inaudible. This also means that grounding a Faraday cage is irrelevant – it just bleeds the energy out faster, but since all the energy is on the outside, there’s no damage to your electronics anyway.
We actually achieved a similar effect, albeit on a smaller scale, while doing our EMP testing and solved it by grounding. A metal shield to block the microwaves, or even a body of water, should reduce this threat significantly.
Additionally, careful analysis of the footage reveals that many of the computers remain semi-operational even after the strike while being plugged in. It’s possible that the worst damage from this missile could just a simple reset of your electronics. Most effective, good old aluminum foil and ammo cans, even with the rubber seal, although you do need to make sure that any metal like an antenna does not touch the foil or the steel of the can.



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