EMP Connectors incorporates proprietary technology, enabling us to offer much greater power handling ability than otherwise available in the industry.
Current diode and traditional MOV technologies respond very quickly to transient voltage surges. This phenomenon may be verified by comparing the maximum clamping voltage of a diode with that of an MOV.
EMP-G60 ultrasound color doppler System, View ultrasound color doppler, EMP Product Details from Shenzhen Emperor Electronic Technology Co., Ltd. An electromagnetic pulse, EMP, is a short disturbance of electromagnetic energy, either from a man-made or natural occurrence. Although that may seem like a large area, a solar flare could easily affect double the area. The most obvious and initial dangers of an EMP attack would be for anyone relying and machines to live. Those who do survive would have to quickly learn how to no longer depend on technology for everything. The best defense is a good offense as they say, and the best way to survive an EMP is to be prepared. You could try to build a massive lead structure, but as you can imagine, it isn’t very practical.
For greater protection, wrap the items in foil, then place them in some sort of container, such as a shoe box, wrap that box in three layers of foil and finally place the box in an aluminum trashcan or other container. A few suggestions of items to protect are, an old, but still working, cell phone, a laptop, a small portable stove, a radio. Remember though, after an EMP, cash will lose it’s value very quickly, as many people will start stealing or looting. Water is needed for so many daily activities, so you’ll want to have as much of it on hand as possible. Eventually, sewer and water plants will stop working, if they work at all after the attack, and you will need all the clean, fresh water you can get. Solar equipment, such as a solar powered stove, can be extremely useful after an EMP, but keep in mind, if it’s not stored in your Faraday cage it will be as useless to you as your other electronics. Don’t forget, you could be anywhere when an EMP occurs, work, home, vacation, or even in the car.
Always keep nonperishable food and a few bottles of water in your car, along with a first aid kit, and a few blankets.
Unfortunately, there is nothing you can do to prevent an EMP attack, but you can be prepared. The Prepared Prepper's Cookbook: Over 170 Pages of Food Storage Tips, and Recipes From Preppers All Over America! The concern with keeping bottles of water in a car is that the plastic will heat up and release chemicals into the water. Conversely, I carry hot water from the kitchen to the chicken coop & tractors every cold morning, such as today, when we awoke to freezing temps. Second: If you are using plastic, you must use heavy plastic containers not the crinkle plastic ones or milk containers.
We keep several bottles of commercially bottled water in our vehicles, and rotate it out about once a year. Now and then it comes in handy for non-emergency drinking, and once or twice we’ve used it for washing a small injury or washing off gritty glasses after a hike.
My concern would be less about chemicals leaching into the water than the plastic bottles getting old, brittle, and leaking. If you insist on keeping bottled water in your car long-term, carry a filter or purification tablets, though be mindful of how much water one table purifies.
If you’re worried about the thin plastic bottles (and you probably should be) Ozarka, for example, makes a very thick bottle. And if you really just want to carry the small, individual bottles, look for some old, cotton socks – you know, the mates to the ones the dryer ate?
I have read that an air burst EMP strike will and will not take out cell towers and operation centers, phone lines for land lines, solar power systems and those types of things. Kinda depends on how well protected they are, and how long their power (fuel ) holds out…. Vacuum tube stuff is fairly resistant… So guess what kind of ham equipment I choose!?? MOST of the power in the EMP is below 100 MHz, so the wiring lengths within a panel box may work reasonably well to protect your equipment.
The cell tower and the operations center will still be there, the power to them is the question. Most if not all cell towers have automatic back up generators that is why the system normally stays up when the power goes out.
As I’ve retired near 4 years, the EMP topic prolly addressed, but a total solution done on an incremental basis. In Florida, (Proudly known as the lightening capitol of the world) we had 911 sites with cell phone towers almost always attached or very close.
Our tower is very rural and in a fringe location, we have lost power a lot in the past, just like clock work the propane runs out at 18 hrs. The solar flare of history that took out telegraph lines (obviously unshielded) caused lines to burn, stretch or melt. Modern electrical lines are sometimes shielded, and some newer transformers are, but many cities and rural towns do not have the newer equipment. Modern communications lines are better shielded than in the past, so they might be able to withstand an EMP burst if on the periphery of such an event. I can tell you another possibility regarding cell towers is that if such an emergency occurred, and the cell towers survived, those lines (frequencies) would be pre-empted by Emergency Management for emergency use only.
Personally, I think “early” nukes that would have caused serious problems in their day may not be so effective now but who knows? I am also absolutely certain the US has also been working on mega and infinitely more effective EMP’s for the same reason.
Have you considered constructing a metal shed around the generators that can act as a Farraday cage? I have read some very inconclusive reports that while some vehicles will die, others which were not being operated at the time will be fine. If ten percent stopped working, the traffic hazards alone would be a problem, but probably not in themselves a civilization ending catastrophe. One thing I like to keep in mind is that EMP novelists generally posit a worst case possible scenario, which is great for a novel, but inherently unlikely in real life.
That doesn’t mean it is impossible, and the effects of the power grid going down even in some areas would be awful, but all the modern cars and trucks just dying in place may not be a major part of the problem. The biggest problem as I read it is the long power lines across the country acting as antenna hundreds of miles long gathering the EMP and burning out transformers and probably some wires themselves. It seems to me that a very important part of preparations for an EMP attack would be having several months worth of stored water, or living in easy walking distance of a reliable water source plus having the ability to purify it. Concurrent multiple bomb bursts will not have an additive TEMP effect, and will even interfere to produce less TEMP than a single burst. Penrod, Very well thought out reply, looks as though you’ve actually done some research instead of just writing out your opinion.
Seems to me, and this is only MY OPINION, that most of the commenters would be well served to take a few minutes to do some research on what an EMP would likely do to their way of life, and prepare for it. Some of the comments, and a few remarks by the author of this article lead me to believe that not a lot of research was done. In any case, I really do think it is important to distinguish between reports by well informed groups and even the best novels. Planes are designed to take lightning strikes and keep on flying because lightning strikes aren’t especially uncommon.
However, I don’t recall seeing any professional literature which claimed that airliners would belly flop all over the country after an EMP.
News media stories and commentary based on professional reports may lead one to the original reports by name if not with a link. I think these are the types of documents we should spend some time finding and reading, bookmarking, and sharing. The most cursory assessment of news and events around the globe during this first decade of the Twenty-First Century leads to the inescapable conclusion that we live in perilous times. Confidence remains high that the United States military can and will defend America from a missile attack originating outside the country. Looking back to that fateful day in September 2001 and realizing the magnificent job local, state, and federal officials in New York did in managing the World Trade Center crisis makes one feel proud.
The detonation of a nuclear device in or above the Earth’s atmosphere produces an intense, time-varying electromagnetic field (electromagnetic pulse or EMP).
Obviously, the HEMP shield and all POE protective devices are hardness critical items (HCIs).
Generally, HEMP facilities are specified as welded systems by the military to be installed during the initial building stage. Present shielding technology can be used to protect existing Regional Emergency Management Control Centers (REMCCs) or the combined regular and emergency communications facilities from the effects of EMP.
To protect the overall functioning of an emergency system, the vital equipment linking first responders to the command system must be shielded as well. As standard operating procedure (SOP) as defined by the user, members of mobile units at the fire or police precinct could exchange the emergency walkie-talkie radios in their vehicles with freshly charged units at the fire house or police precinct every 24 hours, or as necessary.
While the goal of achieving a cost-effective shielding solution may begin with a consideration of the attenuation characteristics of the shielding material, once a decision regarding all-welded steel vs.
Once a material and construction type has been chosen, shielded doors become the most critical component in the system. Accessories are needed to transmit power and signals, HVAC, liquids, or gases into or out of a shielded environment. As a minimum at the time of acceptance, all shielding systems should be tested to confirm shielding performance in accordance with MIL-STD-188-125-1 and -2. One of the critical problems with the use of a shielding system is the lack of any clear-cut understanding of exactly who is responsible for maintaining the integrity of the system. Absolute performance and reliability of a shielding system is essential in times of emergency. When emergency responders enter large structures (such as apartment and office buildings, sports stadiums, stores, malls, hotels, convention centers, warehouses), radio communication to other responders on the outside is often impaired.
The National Institute of Standards and Technology (NIST) is involved in a multi-year project to investigate wireless communications problems faced by emergency responders (firefighters, police, and medical personnel) in disaster situations involving large building structures.
The work has involved collecting a large body of open-literature data of quantities used to assess wireless communication channels. Because lives may be at stake in emergency response scenarios, a higher standard for reliability of service must be applied compared to those that might be deemed adequate for commercial applications. A recent study reveals radiation from solar events is unlikely to affect earth & the dose of radiation emitted during the events isn’t enough to harm people.
Next comes planning, protection options, installation, test and certification, cost, financing and development of new products, services and markets – an ambitious scope. In Part 1 of this article, a national program is offered in two phases to make EMP protection viable: Phase 1 is a two-year pilot design and installation of EMP protection of a few villages and towns. In Part 2 of this article, entitled, EMP Protection of Buildings, protection detail is addressed.
Solar rooftop costs are projected to achieve parity with the electric grid in kWhr cost before the end of the present decade. The last section of this article presents a summary of new products and services created, their markets and the resulting millions of jobs that will be developed.
This article is concerned with a particular type of electromagnetic pulse (EMP), specifically high-altitude nuclear EMP. The effects of low-altitude nuclear EMP, however, were foreseen by Enrico Fermi prior to the very first nuclear test in 1945. By the time of the first high-altitude nuclear explosions, Fermi had died and the other great physicists of the time expected the EMP from a high-altitude detonation to operate under the same basic mechanism as a low-altitude detonation.
The first openly available account of a high-altitude nuclear EMP is from the helium balloon lofted Hardtack-Yucca test of a 1.7 kiloton nuclear device over the Pacific Ocean on April 28, 1958. The EMP from that test was a pulse that was five times the oscilloscope limits at most locations. In July of 1962, a higher yield detonation at a much higher altitude made its effects known in a much more dramatic fashion that proved conclusively that previous theories of high-altitude nuclear EMP generation were wrong. Because of its proximity to Hawaii (about 900 miles away) it was necessary to announce the time and location of the Starfish Prime test to the public. Although the intensity of the EMP from Starfish Prime caught scientists completely by surprise, and resulted in very little in the way of useful EMP measurements, they were more prepared for the subsequent high-altitude tests of 1962. Finally, in the Bluegill Triple Prime and Kingfish high altitude nuclear tests of October and November 1962, the scientists were ready for this previously unexpected phenomenon, and accurate EMP records were obtained. The Soviet Union also had their share of EMP problems during their 1962 high-altitude tests over Kazakhstan (which was then a Soviet Republic). In 1963, Los Alamos physicist Conrad Longmire was shown the EMP results of the high-altitude testing and finally figured out the mechanism that was generating the surprisingly large EMP.
Figure 2 shows how the peak EMP radiated field strength reaching the ground varies with the weapon yield and burst altitude.
One default value is that 20*log10(5,000) = 74 dB or more shielding is generally needed for EMP compliance. The Senate Committee on Homeland Security and other pro-EMP protection organizations are perceived by many to be frustrated from lack of timely U.S.
Other interim lifestyle options may be offered at HOA (Home Owners Associations), developments, hamlet, village and town levels for EMP protection.
Figure 3: Standard of Living after an EMP burst, assuming the entire local gathering is also EMP protected. The surviving group size from an individual to a large city is displayed as the horizontal axis. Figure 3 shows that basic surviving is scored very good compared to no other EMP protection.
Figure 3 also shows that one major disadvantage of the EMP survivalists is that he loses his job after an event since nothing else is working anyway.
There are four tiers of EMP protection to be initiated herein in order to get things started.
They are started at the same time and have been selected by location and economy as discussed later.
The master plan also provides for north and south (different latitude) locations and three geographical regions in the U.S.
Figure 4 also has a three-line brief (shown in black), closest to the center square, to suggest what is covered in their respective tiers.
The following discussion addresses some information about the first Tier-1, High Income Homes, Commercial and Other Buildings. Home EMP protection in Tier-1 involves a 100% shielding of the outside skin (including the floor), some details for achievement of which are provided in later sections The shielding is bonded and grounded to earth and any lead-in power lines and others (telephone, data) are filtered and surge suppressed as also presented in later sections. Along with the solar rooftop is both a battery bank of about 30, 12-volt deep-cycle lead-acid batteries. The cost for a high income county, EMP protected home with protected solar rooftop will range from about $50,000 to over $100,000 for large homes over 10,000 sq.

Phase 2 of the proposed National EMP Protection Plan is the follow up of Phase 1 as it is the implementation thereof.
Remember that Phase 1 had a design and development team at each of the pilot 12 villages and towns at the county level.
Meanwhile a consumer EMP protection guide was under development in Phase 1 and many seminars are taught at different levels to ensure timely awareness, and how-to actions and events.
Implementing Phase 2 requires significant training in all facets as the implementation involves roughly 500 times the Phase 1 cost and activities, but spread over eight years. Detail discussion of Phase 2 is deferred here as emphasis shifts over to physical realizability, costs, new products and services, markets and job creation.
This section gives the readers a peek at expectations regarding costs and jobs, first for Phase-1, EMP-Solar, Pilot Project (experiment or study). Figure 6, in a spreadsheet form, gives a glimpse of the various element data and their totals on the bottom line.
The electric utility industry reports that 38% of their electricity load (users) are residential and 62% is a combination of commercial plus industrial. Figure 7 shows that the cost for Phase-1 over the first two years is about $1.3 billion (total at bottom right in column H). The above financial information is admittedly rough, but adequate to get a first order evaluation of the financial doability of Phase-1 and Phase-2. Don White, registered professional engineer, retd., holds BSEE and MSEE degrees from the University of Maryland. At Don White Consultants, he published a bimonthly trade journal called EMC Technology magazine circulated over four continents.
Many transient suppression companies express their power handling ability (in watts) using an 8 x 20 microsecond pulse waveform.
However, the inherent inductance introduced by the two different devices after breakdown has a profound effect on the settling time of each. An MOV with a breakdown voltage of 38 volts has a maximum clamping voltage of 100 volts when pulsed with a 5 amp, 8 x 20 µsec exponential decay pulse. If you require further details regarding the transaction data, please contact the supplier directly. An EMP can be damaging to all kinds of electronic equipment, and if it is powerful enough, it can even damage structures or buildings.
However, if three EMP attacks targeted different parts of America at the same time the whole country could be affected at once.
They would have to find new ways to cook, and new ways of keeping their family safe from harm. No matter how much planning we do, or how many precautions we take, we just can’t know for sure what would happen in this scenario. The first thing you should do to prepare for an EMP is get a Faraday cage for any important electronics. It’s recommend you wrap an item in at least three layers of foil to make sure it is protected. It may seem like overkill now, but should an EMP occur, you’ll be glad you took this precaution. If you want the best protection for your essential electronics, and don’t mind paying a lot, consider this option. Just think about technical items you would most need in a blackout or other emergency and put those in. Keep this in mind when making or purchasing the cage, and be sure it will hold everything you wish to protect.
Make sure you have survival equipment within reach no matter where you are, by keeping supplies in your car as well as your home.
It’s also a good idea to have a good pair of shoes for each person in your family in the car, incase for any reason you must stop driving and travel on foot. Keep these tips in mind and you will be well on your way to surviving one of the potentially most harmful and damaging attack in existence.
It’s not a big deal especially if you only plan on using the water in emergencies but it may not be a good idea to make a habbit of it. Our DS works in a very hot environment in summer and he needs a lot of cold bottled spring water. Most bottled water is good for up to six (6) months, maybe more, as long as it hasn’t been kept in extreme heat. The blocking diode – that is the bit that stops current going the other way at night right?
And one person will tell you an EMP will fry cars electronics and they become 2 ton boat anchors, someone else will tell you the engine may stall but will start up again straight away.
I am absolutely certain there are weaponised nuke EMP’s out there that are light years more potent – it stands to reason doesnt it?
I may not have enough time left on this earth to see any of them but I really do think I will.
But you could place it in a large metal cabinet and tape the cracks with metalic tape from the hardware store. Also some evidence that many of those knocked out while operating could be restarted simply by turning off the ignition, and turning the car back on.
The design, power, and distance of the EMP bomb would all affect its impact on a variety of electronics, including those in vehicles. On the other hand, if the water grid itself mostly survived, it would be easier and faster to restore than if it was destroyed. Lightning and EMP are not the same thing though, so what works for lightning may give little protection against EMP, or may give quite a bit. It may be out there though, so anyone concerned about EMP should spend some time noodling around the Internet looking for professional reports. They conclude that a massive Carrington size event would have a lot of people in seriously deep trouble, but ultimately we would recover in a few weeks to a couple years: In both best case and worst case no small thing, but not the end of civilization.
The nation has an extensive missile defense program, a legacy of the Cold War era; and the government has had many years to prepare for whatever the future may hold, as well as plenty of doctrines for guidance. These facilities include electric power facilities, oil refineries, water treatment plants, banking systems, pipelines, transportation systems, emergency facilities, and communications facilities.
Imagine what might have occurred if the perpetrators of that vicious attack had included in their suicide mission the detonation of an electromagnetic pulse device that could disrupt communications of the police, fire, and medical teams responding to the emergency. The EMP environment produced by an exo-atmospheric event is caused by the sudden entrance of energy (chiefly gamma rays) into the atmosphere. Specific areas within a facility containing critical high value hardware, software, or other equipment should be hardened to the effects of IEMI or other deleterious electromagnetic conditions. Vital communications equipment is, of necessity, deployed throughout the community when emergency strikes. Today’s shielding industry produces small copper enclosures fitted with shock mounts that can be installed in all mobile field units. Similarly, ambulance crews could have an alternate exchange point at a local hospital or other appropriate location. These include maintenance, installation timing and cost, life cycle parameters, and the system’s adaptability vis-a-vis a number of physical requirements.
While accessories have an important impact on total system performance, their performance can be controlled by following proven techniques and by applying the appropriate design principles. Shielding effectiveness testing is generally a field test at the highest frequency of usage. At too many facilities, there is an ongoing power struggle to shift shield maintenance responsibility from the facilities to operations department and vice versa.
The key to obtaining a good shielding system is an understanding that seams, doors, and other penetrations are the critical elements that must function as a whole to create an effective shielding system. To protect a shielded system investment, look for a full service, turn-key designer, manufacturer, installer and tester of shielding systems with years of experience in the military and government arena and a strong background in the EMP field. Report of the Commission to Assess the Threat to the United States from Electromagnetic Pulse Attack: Executive Report, 2004.
MIL-HDBK-423 Military Handbook – High Altitude Electromagnetic Pulse (HEMP) Protection for Fixed and Transportable Ground-based C4I Facilities Vol.
Wireless communication from within large buildings and other structures can be complicated by several factors, including the strong attenuation of radio signals caused by losses in the building materials, scattering from structural features (multipath), and the waveguiding effects of corridors and tunnels.
The work, funded by the Justice Department’s Community Oriented Police Services (COPS) program through the NIST Office of Law Enforcement Standards, has grown out of communications problems such as those encountered during the September 11, 2001, collapse of the World Trade Center in New York. To provide statistics on signal level and variability in representative environments, NIST researchers measured the received signal strength outside the various structures while a transmitter was carried throughout the interior. It begins with a brief EMP historical review demonstrating the field strength threat that must be shielded against in order to assure survival of electrical and electronic items and systems, and the retention of our modern lifestyle.
This includes shielding of buildings, via shield options, shield bonding, grounding, cable surge suppression and filtering. This encourages rapid EMP protection expansion, hopefully, before the first EMP event strikes.
Although much of the history of high-altitude nuclear EMP remains classified, the unique characteristics of high-altitude nuclear EMP were apparently not foreseen by anyone in the scientific and engineering community.
As a result of Fermi’s foresight, all of the lines leading to electronic recording instruments were carefully shielded. The electric field was initially a positive-going pulse rather than the expected negative pulse. Many were watching the detonation under cloudy skies over the Pacific as 300 streetlights in Honolulu were abruptly extinguished, many burglar alarms went off and a microwave telephone link to the Hawaiian island of Kauai suddenly went dead. In a high-altitude test of October 22, 1962 over central Kazakhstan, and a carefully monitored 570-kilometer telephone line was shut down, a shallow buried 1000-kilometer power cable was shut down (along with a fire in the power plant feeding the line). One was the large effect of the interaction of the earth’s magnetic field during high-altitude EMP. The pre-ionization can prevent the formation of part of the EMP from the secondary explosion. While EMP survivalists plan to move out to the country, storing water, 25-year shelf-life freeze-dried food, medications, guns, ammo and barter items, they fail the lifestyle test. It scores particularly bad in the big city since there is a plethora of starving people ready to break into the homes of anyone storing food. However, if a village or town were EMP protected, and almost all employment is geared to the local events of a city, job retention may approximate 90% after an event.
Except for EMP survivalists, who have started their planning and implementing years ago, the top three tiers may initially be regarded as Phase-1 pilot programs, from which a substantial pragmatic learning experience develops. Each tier advisory group has a representative of the other two tiers plus an EMP survivalist, a county Economic Development office participant, and a Chamber of Commerce person since all learn from the progress, failures and wisdom of each other. This is mentioned now to inform the reader that EMP protection for new home construction is estimated to cost about 65% of that for a retrofit home, since EMP protection is more easily and economically achieved on a new home construction.
They provide an energy capacity of about 30 kwh (kilowatt hours), nominally sufficient to handle all night time use and a few overcast days when solar electricity is nearly unproductive. Near continuous feedback among all entities takes place to ensure (1) not repeating things that work poorly, plus rationale and (2) emphasizing, in a timely manner, those that work well. Once a week a broader webinar is orchestrated for both the 12 EMP villages and towns to participate and for others looking on who may be anxious to participate during Phase 2. Especially significant is the generation and refinement in mass production of the solar rooftop installation and solar panels and inverter production, all with built-in shielding and surge suppression.
This is spread over 12 counties with the first three, each serving a town population of 10,000 which is the highest cost at about $386 million.
Part 2 of the article presents methods and techniques for EMP protection of buildings, solar rooftops and other structures. He began his career as an audio and video test engineer for Ampex Corp., the manufacturer of audio and video tape recorders. He is a former member of IEEE Broadcast Society, and is now part-time electronics consultant and a part-time non-fiction science writer.
At EMP Connectors, we rate our power handling ability to a 10 x 1000 microsecond pulse waveform a much more stringent standard - requiring 6 times the power handling ability of the 8 x 20 standard. By comparison, the Avalanche Zener diode settles to its maximum clamping voltage after only 5 nsec.
An EMP Connectors Avalanche Zener diode with a similar rating of 39 volts has a maximum clamping voltage of 54 volts when pulsed with a 19 amp, 10 x 1000 µsec exponential decay pulse. Most EMP’s affect a relatively small area, an attack could affect northern states from Maine to Wisconsin for example.
Prisoners would be able to break out of jails all over the country, and people would resort to stealing, looting and violence for any food or first-aid available. This is a cage made of conductive material which can block electric fields, so electronic devices stored here would still work after an EMP. Keep in mind however, this is a very rudimentary example and might not work in a massive EMP attack.
And if you have stashed your cash in an electronic safe, you’re out of luck once again. Food, bottled water, extra blankets and even supplies for cooking without electricity are all things you should already have, but it wouldn’t hurt to stock up on at this point. Make sure your car is well maintained and running smoothly, you never know when a five minute drive could turn into a longer journey. That said, in the days after an EMP, you may find some of the urban population bugging out from the city.
If you have water at all you will be only to happy to drink it if it is clean, no matter what it is in. Same for cell towers, the towers may be ok, but the equipment is not shielded and will fry. A solar EMP can last for hours or even days, pumping more and more power into the equipment constantly. Lots of YouTube videos showing this and testing it to prove signals can’t get through. But we don’t know how bad it would actually be, which makes it tough to prepare effectively. A single nuclear device exploded at high altitude will not render vital electrical services inoperable across the entire United States as has been suggested in many media references.
It is time consuming, so I tend to bookmark sites like the ones above and put the bookmarks in a Preps folder. If that is the case airplanes will not rain down, and there will be plenty of time to safely land all planes in the air. This paper does not discuss the capabilities or readiness of the United States military or that of its allies, nor does it focus on developing effective standards for first-responder communications both inside and outside challenging environments such as skyscrapers and tunnels. Most critical infrastructure facilities depend upon electrical and electronic systems to function.
When such an event takes place above 30 km, it is defined as a HEMP (high altitude electromagnetic pulse) effect and can affect a vast area.
Creating an electromagnetic barrier that will prevent or limit HEMP or localized EMP fields or conducted transients from entering the shielded area is primary. Smaller facilities, upgrades or retrofits may involve other forms of shielding, particularly modular shielded panels.
These modular systems can be installed within an existing facility to meet the dimension and operational needs of a particular entity. The equipment of first-responders could be damaged or rendered totally inoperable during an initial surge.

These shielded boxes will exceed the MIL-STD-188-125 performance requirement and will protect field radios from electromagnetic pulse (Figure 4).
Those radios in need of recharging could be placed in a secure shielded enclosure with a battery charging system. As noted above, typical shielding system construction choices include welded steel rooms or buildings, modular systems made of galvanized steel or copper-clad panels, and modular pan form designed systems for retrofitting or for establishing shielding within an existing facility. While fewer seams would logically mean less potential for degradation, it is seam quality that is absolutely vital. To preserve the integrity of a shielded enclosure, doors must include a durable means for making repeatable seals around their entire perimeter. Necessary penetrations that do not compromise shielding effectiveness can be achieved by using a combination of power line filtering combined with ESA and MOV (metal oxide varistor) protection or with waveguide below cut off and fiber optic concepts (Figure 8).
Unfortunately, without clearly defined responsibility for preventative maintenance, shield integrity will diminish rapidly.
It is the design of the shielding system and the quality of the installation that will determine its long-term reliability.
Insist on seeing test reports from previous installations that document the vendor’s ability to provide a reliable shielding system.
The researchers also collected data on the level of reflectivity (multipath) a signal encounters as it travels from within the structure to the outside. The experiments were carried out at emergency responder frequencies to gather germane and useful data for those developing and assessing new technologies and creating standardized test methods within the context of the unique needs of the emergency response environment. Structures range from individual sheds and homes to office buildings, shopping malls, hotels, industrial parks and warehouses, public works and hospitals. In addition, the existence of widespread EMP protection dramatically reduces the chances of experiencing an EMP attack in the first place. Nevertheless, much information was lost because of the intensity of the EMP close to a nuclear explosion. The EMP was principally horizontally polarized rather than the expected vertical polarization. Also, arcing across some porcelain insulators on overhead power lines caused the insulators to break, and consequently, some power lines to fall to the ground. The other factor was the coherence of the pulse caused by enormous amounts of gamma rays hitting the upper atmosphere at almost exactly the same time. This seems ironic since employees of DOD (Department of Defense), DHS, DOE, DOT and others, nearly all live off premises, shop in malls, shop pharmacies, buy gasoline and other products from EMP unprotected facilities.
Therefore, this section addresses a few examples of strategies, tactics, planning and implementation options. On the first day of the EMP event, they lose their job, die from failure of the dialysis machine, lack of gasoline and scores of certain provisions. This is due to highrise structure limitations; the starving are stalking the survivalists for their own surviving, since goods replenishment severely lags need in bigger cities. In fact it could exceed 100% if the town is a manufacturer or it develops products or services in demand from unprotected neighboring areas struck by the same EMP event. For Phase-1, two-year pilot program, a town of about 10,000 population is selected for the first tier.
As explained later, the number of batteries is adjusted for greater latitudes and climates having more overcast days. Note that nearly everything has been protected so that the affluent town as a whole is nearly unaware of an EMP incident. However, this is not relevant since, as mentioned earlier, the money comes from the issuance of county and corporate bonds from investors, retirement funds, and annuities. Thirty per cent (30)% is arbitrarily added to account for government participation cost, some volunteer time contributed, publicity and education costs, plus items not identified in Fig. As such, Part 2 will cover details of shielding, bonding, grounding, and cable or device surge suppression and filtering. He later became the Transmitter Supervisor for a broadcasting company with transmitter locations on mountaintops, subject to severe lightning and significant EMI problems due to many types of closely packed transmitters.
EMP Connectors can provide over 1000 watts of protection per line, testing to the 10 x 1000 pulse waveform, establishing a new standard in the industry for EMP protection within a connector. As a result, the protected line will see a much smaller amount of energy when protected by a diode as compared to an MOV. People traveling on airplanes would also be in danger of the plane crashing due to the loss of technology.
If you have enough land and resources, you can consider setting up a camp as a charity of sorts. The frozen bottle keeps the other 2 or 3 cold, and, the frozen one is almost thawed by the time he gets around to drinking it. At one time 911 sites used to pop like corks there before we re-grounded them to a spec that exceeded the NEC. Those countries would destroy themselves from within in a very short time without the aggressor putting a single boot on the ground. Could double the barrier by placing thermal foil insulation on the interior walls of the cabinet.
It may be some time -days, weeks, whatever- before widespread air traffic can resume, but people in the air during the attack will likely be fine.
These systems can be susceptible to a little known, yet significant and growing threat, the radio frequency weapons mentioned above.
The sudden inability of the mayor and other city government officials to mobilize resources during such a chaotic event could be catastrophic. Detonation of a weapon at lower altitudes will produce an electromagnetic pulse that may be less intense, but will still be strong enough to induce fields that can cause critical systems in a smaller more localized area to malfunction because of circuit damage (Figure 1). The shield and all points of entry (POE) must be treated properly to maintain shield integrity. Items such as shielded vestibules with interlocked doors, waveguide honeycomb vents, various pipe penetrations, power and signal line filters with surge protection (electronic surge arrestors or ESAs), and fiber optic penetrations are all HCIs—individually or as part of an assembly. Industry standard modular shielding systems are available in single-shield copper or steel, double-layer steel cell type, or steel pan form enclosures and are easily installed in existing facilities needing HEMP or EMP protection. Fire houses, police precincts, hospitals, fire trucks, police cars, and ambulances are all vulnerable to electromagnetic pulse. Since radios are a high cost item, the recharging stations should be in tamper-proof security containers (Figure 5). Pin-pointing any possible weak links during the design stage of a shielding system helps to assure reliable performance after procurement.
An analysis of shielding alternatives indicates that some seaming techniques require fewer seams per shielding surface area. Shielded door performance should provide a safety factor of up to 20 dB both initially and after a reasonable number of cycles for all requirements up to 100 dB at 10 GHz. Signal line interfaces, penetrating the shield, should use a fiber optic system for optimum EMP security. Even when a problem is finally noticed, there is a tendency to resort to untested, “band-aid” or quick fix solutions.
In many cases, single-shield, “Pan Form” modular steel, double-shield galvanized steel cell-type panels, or a lightweight 12 or 24 ounce copper system can provide a reliable, cost-effective solution for EMP applications. Since the facts did not agree with the accepted theory of the time, the results were dismissed as possibly a wave propagation anomaly.
This coherence resulted in most of the first wave of EMP energy being concentrated into a very narrow pulse of very high amplitude. The matter of post-EMP lifestyle is a major consideration not addresse in the Internet with few exceptions.
Their focus, however, is surviving, defined as a bridge from a disaster to the day things are “restored.” However, after an EMP event, lifestyle may never be restored within their lifetimes.
Of course, most value judgments are in the eyes of the beholders (like lifestyle, per se), while others are absolute, like losing your job. Further, each tier can learn from a higher (or lower number) tier for possible sectors to EMP protect, along with rationale and cost. Column D is the approximate number of homes involved and E is their rough cost per average home. From the previous paragraph, $3,800 is less than 1% of the county per capita wealth; so this is no financial challenge (in other words, it is readily affordable).
These apply to structures from sheds and rooms to small and large homes, and to commercial and industrial buildings less than about five floors in height. The people that made it all the way to your homestead probably have some survival and planning skills that may be valuable. And they’re rotated often because I’m always leaving the house without a drink!
My feeling is that since a non-grid tie solar power system does not have the long wiring attached, it may be ok. The local electricians used to whine about what we wanted, but they would do it anyway because it was superior to the code and we paid the bill. IF that’s the case, that is a big contrast with the novels, which, again, I thoroughly enjoy. RFWs have already been used to defeat security systems, to disable police communications, to induce fires, and to disrupt banking computers. At present, homeland security, some local law enforcement agencies, and border patrol resources have been stretched extremely thin. Another form of attack, intentional electromagnetic interference (IEMI), has been defined as the “intentional malicious generation of electromagnetic energy introducing noise or signals into electric and electronic systems, thus disrupting, confusing, or damaging these systems for terrorist or criminal purposes.” Nature’s contribution, lightning EMP (LEMP), like HEMP and other forms of EMP, involves a brief but intense electromagnetic disturbance in the atmosphere and thus presents another potential threat to the operation of electronic systems. Retesting should be an annual scheduled requirement—a fail-safe measure that will detect any problems before system failure occurs and thus assures ongoing EMP protection.
These solutions may satisfy the primary objective of meeting shielding requirements temporarily, but may not provide an adequate factor of safety to assure long-term reliability.
Again, remember that another intervening housing rack, cabinet, room or whatever else may reduce this number. For example, following an EMP event, the EMP survivalists individual (or family) loses his job, loses access to shopping stores, hospitals, dentist, undertaker, etc. Ignoring inflation, this will be reduced by about 30-40% in 10 years by Moore’s Law for electronics and by quantity production cost reduction.
This requires that some modes of communication such as satellite and fiber optics are functional. Column F is the total home cost in units of million dollars (M) for the Tier and location shown in Column A. Remember, the numbers here are rough since there are many expenses and variables involved and the lower cost of government participation and support has not yet been added. Many of these devices are small, suitcase-sized or slightly larger devices that could be smuggled into the country the same way drugs and other contraband penetrate our borders and become available on the black market. Unfortunately, they are not credited for deterring potential attacks as much as they will be remembered for the one they did not. Still, to achieve the most reliable shielding system, it is always good policy to minimize penetrations and seams. In contrast, the standard “Double Electrically Isolated” (DEI) construction requires two seams per joint. The industry standard RF door most suitable for modular cell or pan form enclosures is the Single Knife Edge (SKE) door (Figure 7).
One example is that many counties will have poorer sections among the wealthier section locations within a single county.
Therefore, at the end of Phase-1, about 3 locations x 3,850 = 11.6 thousand Tier-1 homes will be EMP protected. This is sufficient to handle air conditioning, and hot water loads in addition to the electrical appliances, lighting, computer and peripherals, radio and TV, etc.
Also, all Tier-1 communities have at least a 4,000 foot metal-mat runway to help ensure vitals replenishment. In today’s world, weapons of mass destruction (WMD), so called “dirty bombs”, radio frequency weapons (RFW), and intentional electromagnetic interference (IEMI) devices can generate localized electromagnetic pulse surges to disrupt everyday services. These devices in the hands of a terrorist are capable of inflicting extreme damage and may be capable of generating a localized intentional EMI disturbance at any location. This premise underlies a useful management philosophy that can be applied throughout the shielding system selection process. Martin has continued to lend his expertise to the company’s RF shielding systems for government and commercial industries requiring protection from critical EMP and IEMI.
Becquet, “Attenuation of Radio Wave Signals Coupled Into Twelve Large Building Structures,” Natl. Contrast this to an EMP-protected municipality in which almost nothing is lost except uncertainty of when the EMP-protected replenishment vehicles, airstrip or railroad siding may be revisited with more replenishments. Parenthetically, assuming Phase-2 is completed eight years later, up to 23 million Tier-1 homes in all of the U.S.
Of course, the solar rooftop is also shielded and processed as explained in a later section.
Space restrictions in this article do not permit discussing the other three tiers here: (1) Column C, medium income counties, (2) Column D, low-income counties and (3) EMP survivalists.
So, keep an extra charge controller (or two) along with some blocking diodes in your Faraday cage.
Consider these key factors affecting modular shielding system performance—material characteristics, quality of seams and penetrations, door performance, accessory performance, and the quantity of seams and penetrations.
Generally, two layers of shielding are used simply because seam quality makes it difficult to achieve the shielding objective with just one layer of shielding. The SKE door can be set up for semi-automatic operation with a door interlock system that prevents both doors from being opened at the same time.
As the Government Sales Manager and Facilities Security Officer, he also assists ETS-Lindgren’s sales, R&D, manufacturing, and installation departments in providing solutions to general EMI and RFI issues. Johnk, “Propagation and Detection of Radio Signals Before, During, and After the Implosion of a Large Convention Center,” Natl. Coder, “NIST Tests of the Wireless Environment in Automobile Manufacturing Facilities,” Natl. Even here, a warehouse can store survivalists freeze-dried and selected canned food, principal medications, etc. For a high-income county of 100,000 population, $40B net worth corresponds to $400,000 per person.
Tamura, “Propagation and Detection of Radio Signals Before, During, and After the Implosion of a 13-Story Apartment Building,” Natl.
Tamura, “Propagation and Detection of Radio Signals Before, During, and After the Implosion of a Large Sports Stadium (Veterans’ Stadium in Philadelphia),” Natl.
These matters lead to the reason why different tiers of EMP protection are addressed as one strategy of several. Korsnes, “Measurements to Support Broadband Modulated-Signal Radio Transmissions for the Public-Safety Sector,” Natl.

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