Testing Mylar Blanket for EMP Shielding

Testing the shielding effectiveness of a emergency (Mylar) blanket. For more information about EMP preparedness, go to disasterprepar....

[@tylermiska8380]

Thanks for this experiment. I was about to line my curtains with these (covered with cloth for aesthetic value) and you just saved me $15

[@rgbcolor6450]

+1 for Dr. Bradley and all his hard work and the information he provides. This guy is great!

[@disasterprepper]

Thanks, much appreciated.

[@melaniel.s8990]

Aluminum foil much better than the Myler blanket...

[@disasterprepper]

@@melaniel.s8990 So true!

[@SurvivalLiving]

Really appreciate you going over this and your other videos for us. Having the equipment for these tests really helps us on how we fabricate our faraday cages. Thank you

[@disasterprepper]

Sure, you're most welcome.

[@Genesis.1-1]

I love these videos. Informative and easy to understand. D. Bradley knows his stuff and I appreciate the time he takes to share his knowledge and insight.

[@disasterprepper]

Thank you!

[@TheWtfnonamez]

It just occurred to me that being an EMP scientist much get very expensive if you forget to shield all of your fancy science equipment from EMP.

[@neilv6754]

Long term subscriber here. Just wanted to say thanks doc for all your videos. And thank you for always answering my questions. It truly is appreciated sir. I thank you.

[@disasterprepper]

Thanks Neil! We appreciate your support.

[@tmt8425]

Interesting test. Thank you for showing us this. I would have thought mylar would do better.

[@disasterprepper]

I was a little surprised too.

[@robertgreen3170]

Curious...did you ground your shield? Did you check the resistivity or continuity of the mylar blanket? Did you try wrapping your analyzer tightly in a blanket and then ground it? Those might have been some very simple tests you could've performed.

[@Justin.JM.McNeil]

I'm still waiting for your video on this

[@Yeshuaschild93]

Hey I'm a targeted individual, I endure havana syndrome dew, mkultra programming and voice of god weapons.. if I ground mylar blankets would it help?

[@jackburton37211]

thank you for your efforts in this field. Your channel should have thousands of views!

[@disasterprepper]

Thanks Jack.

[@shalom1688]

God Bless You Dr Bradley. Thank you for the work that you do, for sharing with us (the layman) your testing in a most understandable way. I am grateful. By the way, I have your book "Handbook to Practical Disaster Preparedness for the Family" What a gift to us. I've read a good bit of it but seem to dwell on my area of responsibility in our home, and the things I am physically able to do. From your chicken wire experiment and comments, I did place on every window of our home, fine mesh screens. I also purchased from Amazon, silver shielding fabric curtains for every window - they were very expensive and took a year to collect. I am also bought a small metal trash can with lid and a shielding gasket for an assortment of things (glucose meter & strips for one. Thank you. My son & I are next considering your car shielding bundle. I shared with my son your video & web page. My husband is not yet on board with this. I don't always understand that. My questions for you is in the area of food and radioactivity. I dehydrate a lot of vegetables and probably have 8-10 month worth in our pantry, all of which is vacuum sealed in glass canning jars. Those jars are then stored in translucent plastic jarboxes by the dozen and placed on an outside wall of a frame house in a dark closet. Your fair guess, would this be safe? Very Sincerely, Fay, Ohio

[@mcdevious2229]

Eight dB of shielding isn't surprising. I've tried this kind of experiment with cellphones without much luck. I tried putting the phone in an aluminum box and it would still ring when called. Thanks for doing this.

[@Bigbaz-bj8io]

Really FFS , how do we block it then

[@jameskrivitsky9715]

Thanks Dr. Bradley for the additional video. Interesting to see the minimal effectiveness of the Mylar blanket in comparison to the static bags in your previous video. I am anxiously waiting for the good news when your EMPStorm will begin shipping. J K

[@disasterprepper]

Thanks James. The EMPStorm is sitting up at UL, waiting for them to certify it. I called them, and they said they had some kind of in-house audit, which is why it's been going so slow. Hopefully, it'll get moving soon. I'm at their mercy at this point. Thanks for your patience.

[@Heinrich99]

I read on a website you can use the inside your microwave "turn off of course" to block EMP. The testing consisted of a cell phone being called from the outside. The test was conducted to show how to protect electronics from an EMP blast.

[@synthetictelepathy]

IT HELPS ME , WITH NEUROLINGUISTIC SYNTHETIC TELEPATHY

[@GatoGordoSocialClub]

Thank you for the test, Dr.

[@prairiepatriot2162]

Another very helpful video, thank you for sharing the results of this important work.

[@GodKnowsITry45]

Thank you for the mylar EMP test. I would love to see an EMP test using Faraday cloth. I've wrapped some of my electronics in it and wonder if it does better than a heavy gauge aluminum foil.

[@billcooperpatriot1059]

I heard that it has to be grounded. You are even supposed to ground your metal garbage cans. Maybe test with and without earth ground.

[@ranichahal794]

How do u ground something? My garbage can area is buzzing like a bee when turn my heat on

[@jeremiahdssdentmorgan3341]

@@ranichahal794 stick copper rod into the ground attach wire to rod in ground and object you want grounded !!!

[@Michael-gu6ki]

How do I protect my solar panel from an emp attack?

[@nomadsurvival4952]

Question what kind of tape did you use I had similar problems with using Mylar bags until I taped the seams with aluminum tape then it worked for me... But for small electronics I like cookie tins and then tape the seams with aluminum tape without the aluminum the tins don't work..

[@disasterprepper]

I have tried various tapes with EMP bags and ad hoc Faraday cages. Wide aluminum duct tape seems to do as good as anything. In this experiment, I wrapped the second Mylar sheet all the way around to the back, so I don't think energy could have easily leaked through the taped seams. It's essentially the same setup I used when testing aluminum foil.

[@FidoHouse]

Exemplifying Scientific Method. Thank you.

[@Cetok01]

Interesting experiment; I've wondered myself how effective mylar might be. Just curious: Is the metal deposited on only one side of the plastic matrix, or is it sandwiched between layers? In either case, could the plastic matrix potentially insulate against continuous metal coverage and inhibit a 'wave-tight' seal, allowing gaps/signal bleed in coverage?

[@disasterprepper]

I'll double check, but just like EMP bags, I believe the metal is sputtered in between plastic layers. The thin layer could prevent a tight seal, but by wrapping it around, most, if not all, of the seams should be covered. Exposed conductor would be better, but even crafted as they are, EMP bags can provide 50+ dB of shielding across frequencies of interest.

[@lronhubbard8580]

Buy a grow tent and flip it inside out.

[@tomkewan625]

All your books, products and videos have helped us prepare for what's likely coming. Thank you for your time and effort. At least some of us will have a chance at getting through it.

[@disasterprepper]

Thanks Tom. I appreciate the kind words.

[@AntstrengthUnlimited]

Thank you for this str8 forward answer 👏🏼👏🏼👏🏼

[@susiea1419]

I wrapped my phone up in a Mylar bag and out it in another one and phoned it, nothing!! Does that mean it’s shielded or just not receiving a phone signal?

[@Fynn-Victus]

Found it thank you for the details

[@brianshanahan3878]

SO glad I found your channel / videos!

[@mondavou9408]

I like your experiment. Thanks for sharing.

[@WorldAquariumSingapore]

Nice experiment thanks

[@c3h84ever]

Appreciate your approach, I have an experiment for you, as a person with a pace maker genuinely concerned regarding an EMP ,how about some type of test on portable shielding for pacemakers, I've looked and can't find anything on this.. I could feel the effects of our "smart meter" prior to shielding with a 5 gallon bucket,Aluminum foil and copper wire coils to ground.. Thanks PS I subscribed

[@ausboy9251]

Love your work mate really interesting video

[@Meditationisthebestmedicine]

do you have an updated video for shielding against wifi smart meters, dirty electricty etc i live in an apartment and i need to know how to create a proper faraday insulation please help

[@hobbyhermit66]

Thanks for doing what you do. This answered a question I've had for some time. 👍👍🖖

[@TheSpecialK45]

Try grounding the mylar blanket with a gator clip and a copper wire leading to a solid ground and then see if that happens to make a different reading on the meter.

[@disasterprepper]

I did this with another Faraday cage in a later video. No real difference. The incident energy is in the far field, so grounding doesn't have a huge effect. Instead, the metallic barrier acts to reflect and absorb energy, even if it's not grounded.

[@ChristianPrepperGal]

Do you think a mylar bag that is 7 mil thick and heat sealed closed would do as good or better than aluminum foil in protecting electronics from an EMP?

[@disasterprepper]

I think foil would do significantly better than a typical mylar bag. If you're talking about an anti-static or EMP bag like the ones I sell at Disasterpreparer.com, they provide around 50 dB of shielding (about the same as a layer of aluminum foil).

[@ChristianPrepperGal]

@@disasterprepper Sounds good, thanks!

[@derpnerpwerp]

I have a question for you. Hopefully you see this. Seeing your antenna made me think about the antenna I have in my attic.. I am a new homeowner.. I was replacing my doorbell transformer recently and I noticed there is a large antenna in my attic with the coaxial cable cut off. Is this a hazard? I am not sure if I could easily remove the antenna it is quite large. Should I be worried about it? I didn't think anything of it till I saw your videos and I saw a news report talking about increasing solar storms. Is it possible that an emp hitting the antenna would cause a fire? The coax is just frayed and laying in insulation. I dont have any emp protection. I am not sure I could afford it.. might be better off just buying some flint and other mechanical survival equipment. Also I have a large 12000 watt generator that I bought after the statewide power outages here in Texas. I am considering shielding that.. but I am not sure the best way to do it. I see some 400 dollar bag for generators but it is too small and expensive for me

[@AMPProf]

It's More likely The Antenna Will Attract Lightning Strikes!!!!!! Does the Antenna have Lightning ground... Also Also YES EMP will be Amplified by Antenna! hells a near field attend will boost to some degree every Signal (except photons) on the EM Scale

[@insanityspokentheluniticplayer]

What if you did a faraday sandwich? A device inside the Faraday bag, inside an ammo box, inside a bigger box lined with this blanket stuff? 🤔 overkill?

[@user-em7pr9iz2p]

Are you aware that they only metallize one side of the PET on mylar? if the metallized sides aren't making contact with each other then wouldn't that weaken the effectiveness?

[@havanamarlena]

Hi, Dr. I sleep in a cave with multiple layers of heavy aluminum and cast iron with sound proofing material. I am still getting attacked but it is dampened down. I am also capturing the attacks with my ultrasonic recorder. Do you have any other suggestions? These attacks involve classified tesla technology.

[@rolliekelly6783]

Do you have any information on protecting welders who have an embedded pacemaker?

[@extendedp1]

Thanks for another great test!

[@disasterprepper]

You're welcome!

[@jublywubly]

This is a great video! Thank you for making it.

[@explained3799]

Thank you for testing mylar. I was curious. I am also curious what would happen if the mylar was doubled - two layers - would that make a difference?

[@LolaMoonflower]

I have an insulated lunch bag with a silver lining...I'm wondering if this has any emf protection at all... I'm thinking this would be a place for my cell phone at night..

[@disasterprepper]

Lola Moonflower I suspect it probably offers a little EMF shielding from the phone’s emissions, but if possible, it would be better to shut the phone off. Even putting it across the room would help quite a bit.

[@LolaMoonflower]

@@disasterprepper I'm sure that would be ideal however inconvenient...of course that would be why I'd like something closer and still convenient and still something I could grab easily if need be... perhaps a lining of the emf fabric inside the lunch bag... Is there some kind of rating on the fabric I should look for..

[@disasterprepper]

@@LolaMoonflower I'm assuming that you still want the phone to receive calls and texts, right? If so, you might consider using an anti-static bag (aka EMP bag). I have some on my website at disasterpreparer.com, but you can find them elsewhere. They can cut the phone emissions by about 99% but still have enough signal for it to receive calls.

[@sl4983]

.

[@heaven-earth108]

i wonder how it wouöd look with 2 or 3 layers of this blanket ?🤔🧐 thank u for content 🙏🏼

[@salsa090968]

Was wondering the same thing. Has to be a cheaper way to cover items that need to remain plugged in. Ferrites are only one component but still need to cover a ham radio with that expensive cloth he tests in other videos.

[@Masteradamant]

At least we learned that we need at least 10 layers of thermal blankets to have a significant shield against emp. I lost 3 inverters to emp and I was burnt in my own house . I’d like to know how strong an emp is in db now

[@witharebelyell2762]

How about the siding from a regular corrugated metal building? I wonder if my house (metal roof, metal siding and grounded) is good enough against an EMP 300 miles away. I cannot get a cell signal at all inside.

[@sdp8364]

Can you tell me if my pacemaker and defibrillator need to be protected during an EMP event? Thank you!

[@disasterprepper]

I can't say for sure, but I did an analysis of a Medtronic pacemaker a couple of years ago, and it looked like it would survive. It might experience an upset, but it was unlikely to be damaged.

[@sdp8364]

Thank you so much for responding! I appreciate that and your insight!

[@jeffdunnage9971]

Thank you, you saved me time and money.

[@springalingading]

What’s the cheapest easiest thing I can do to see if my chronic skin burning is from emfs? I live in a basement and they have like 10 different WiFi networks that we can hook into between this house and with the two neighbors close by. I know nothing about all this. I jam chronically ill, skin burning being the worse and was wondering if you could recommend something cheap I could by to drape over me or wrap up in or something to see if I can get away from these frequencies to see if it help the skin burning. Any advice is much appreciated. I react to food and odors too. I retained the heavy metal Gadolinium in mri dye contrast.

[@disasterprepper]

I'm really sorry to hear about your suffering. It sounds like you suspect it might be related to electromagnetic fields (EMFs) but are open to the idea that it could be due to some other cause. That's good. Many people assume that EMFs are the source of their issues, when in fact it could be something else entirely. One way to get some indication is to simply get away for a few days, take a vacation somewhere away from all the technology. If you see improvement, it likely means your problems are environmental. It still won't confirm that it's EMFs, but at least you'll know it's not an underlying health issue. There are many ways to reduce fields inside your home, but most are not cheap. One thing you could try is to buy a conductive blanket (maybe something made out of silver thread, since they're very soft). You could wrap it around you when you're sitting around, or sleep with it over you at night. Again, if it gives relief, that would be a pretty good sign that you might be hypersensitive to EMFs. There's more to know on the subject that I can explain in this email, but you might seek out a reputable book on the subject to get an understanding of the sources of low-frequency magnetic fields and high-frequency electromagnetic fields.

[@springalingading]

disasterprepper thank you for your reply. A friend who has this sensitivity recommended I buy this sheet/ blanket to try. Do I just lay under it or does it need to be grounded? I am not even sure what that means. www.amazon.com/RFID-Shielding-Silver-Fabric-Roll/dp/B01KYJT0RA/ref=redir_mobile_desktop?_encoding=UTF8&psc=1&ref_=sspa_mw_detail_6

[@GladYouMissed]

I wonder how it handles higher frequencies such as 2.4g and 5G

[@lronhubbard8580]

It works

[@MitzpatrickFitzsimmons]

very interesting video! I am curious if the 8dB shielding is cumulitive with layering? Would 5 layers give 40dB of shielding for instance?

[@penpoint7775]

Thank you for sharing your work. I was wondering what the result of this experiment might be if you doubled or tripled the layers of mylar. Thanks again.

[@disasterprepper]

Shielding roughly goes up additively in dB, so two layers would come close to doubling the dB level of protection to closer to 16-20 dB.

[@salsa090968]

Making a EMP medical bag for all my medical devices. Glucometer, Digital BP cuffs, O2 Sat finger monitors, Digital Stethoscopes (expensive), thermometers, Kardia EKG. Commenting to give persons with health issues or healthcare professionals suggestions on items they may want to secure. Still searching for portable AED I can afford. Few others like an IV Pump but not in rush with a pump because would need to figure out a source for IV solutions.

[@blessed4596]

@ Penpoint 777 Exactly my thoughts, or perhaps simply quadrupled it to be exact! 💙

[@lancepittman5066]

Just out of curiosity, are you employed by disaster preparer?

[@smadden911]

Wouldn't these boxes need to be taped and sealed? This is just wrapped.

[@joegoodeyon6131]

Have you tested the EMP Shield product? If not I would provide you with one to test.

[@disasterprepper]

Sorry, but I try not to comment on other company's products.

[@m1u2j1o9]

@@disasterprepper An Answer is your view or experience for a particular question. A Comment is your view on a particular answer. An answer is true but may be precise or general in nature. Whereas a comment is a subjective opinion that may be correct or incorrect or neither. As a doctor, you have a duty-- if these guy's are swindling people, and you're the guy to call bullshit, that would be truly impressive.

[@SpicySpleen]

thank you for your work

[@omniteksilbear4559]

Emp Doc what would you recommend for 122232 milliard volts of rf protection. I've got aluminium and a hard foam but it still falls short.

[@disasterprepper]

Sorry, can you provide a little more on this question. Not sure what you're asking.

[@markthomas4594]

Great stuff thanks for sharing,

[@kellycarver2500]

You need to make some videos on how to protect from DEW, like is blue paint the only answer? They are using this all over the place, and it needs to stop! Until then, what else can we do besides blue paint?

[@mohdhaq640]

Really appreciate your effort. Guide use how we can protect from radiation

[@sl4983]

He said it doesn't work.

[@jadehare]

Obviously this doesn’t work. It’s an EMP, a survival blanket won’t stop that. We should test the effectiveness on blocking 5G because some people have been lining their walls with them which sounds a bit weird

[@inthehouse9062]

Can you recommend a faraday blanket?

[@chrisanderson7495]

How about aluminum foil? And ground it.

[@sndep9617]

was the blanket grounded?

[@medved4030]

Wow, someone should have showed this to Chuck McGill

[@ramirocortez6392]

What would be best protection for my generators?? Thank you!

[@disasterprepper]

Generators are pretty robust, but if you want to protect them, I recommend covering with conductive fabric. You can find your own or get some from disasterpreparer.com/product/emp-cloth/.

[@sirskaven7624]

Could these be used as layers in an accumulator?

[@brucewayne-cave]

Much Thanks !

[@amongthegreat8236]

Thanks for the research

[@Pampered_gal11]

Aren’t they flammable ?

[@rachelhancock6833]

Could this block RF radiation

[@thetastelesschef7463]

Is the front cover supposed to be sealed tosome degree so that nothing can get in or out? or if that a misunderstanding?

[@disasterprepper]

The entire structure should be sealed with something conductive to create an effective Faraday cage. In this case, I wrapped a crate with a mylar blanket.

[@ravipillai7553]

Great presentation, but for the short answer go to 5:44

[@disasterprepper]

Thanks Ravi.

[@HardcoreFourSix]

have you tested foil-backed house wrap?

[@disasterprepper]

No I haven't tested that yet. I'll try to do so sometime soon.

[@kitty9392]

Thanks for doing this Do solar panels need EMP protection?

[@disasterprepper]

If they're not connected to anything, probably not. If they're connected into a system, you should put broadband ferrites up by the panels and down by the inverter. See disasterpreparer.com/product/emp-ferrites/.

[@kitty9392]

@@disasterprepper Thank you for the valuable information and the quick response! Have a fabulous holiday weekend.

[@JOESRQFLUSA]

THANK YOU

[@manictiger]

Here's a guy that maxed out his intelligence stat and science skill tree.

[@KenJamesJr]

You should be measuring for 60 GHZ (5G), damage instead of 500 MHZ..

[@disasterprepper]

5G wasn't the focus of this test. Rather, it was targeted toward the frequency content of an EMP (which goes out to about 1 GHz).

[@captainflux4967]

Here’s where the cool science went😎

[@Nightowl5454]

I've seen people use aluminum screens and zinc coated hardware cloth claiming it offers some protection against EMPs. From my research this sounds inaccurate because the EMP would go through the screen holes. Can you say if it does offer any protection at all?

[@disasterprepper]

Screens can offer protection, but as you said, the holes compromise the shielding. If the holes are kept to less than 1 mm, it can work fairly well (about 50 dB of shielding).

[@Nightowl5454]

@@disasterprepper so that's quite a bit smaller than aluminum window screens. May as well go with the cheap thin aluminum sheets like for box panel trucks.🤔🤔🤔 Is there anyway yet to EMP proof a window? I can imagine the technology will eventually be there some day like adding something to the glass or maybe that "clear" aluminum might do the trick for at least moderate reduction levels once the price of it comes down.

[@korradog81]

Thankyou😊

[@chrisandkatiebrooke3498]

Does line of sight matter? That changed in the experiment too.

[@disasterprepper]

The line of sight is broken in the experiment by introducing the conductive barrier. Of course, that's what we're trying to do. If you blocked the line of sight with cloth or paper, it wouldn't have any measurable effect. But if you cover the measurement device with something conductive, it blocks the RF energy.

[@pt5488]

Did you try this experiment using radiant heat barrier? I would like to see those results.

[@disasterprepper]

I've not tested with radiant barrier, but I suspect it would work well if you cover the seams with conductive tape.

[@colt45peacemaker]

I would have liked to have seen the mylar cover grounded. What frequency is an EMP? All frequencys I guess Close to event and longerwave at distance, detectable over horizon for inonospheric reflection (Skip). Long wire receiveng will pick up more energy converting it to destructive voltage. Short wires far less RF energy absorbed. Unplugging equipment and antennas can do much to protect gear. I believe threat of damage by man made EMP is over rated unless very close to emission source. Wires and cuircut traces have to be resonant to the frequency inorder to absorb energy.

[@disasterprepper]

It ends up that grounding really doesn't have any measurable effect when in the far field of an RF source. Some people think that attaching a ground wire would help shielding, but the inductive reactance of the wire is quite high at RF frequencies. Even if it wasn't, the conductor itself acts to reflect and absorb the RF energy, regardless of whether it is grounded. As for the EMP, it is a broadband event (narrow in time, broad in frequency span). Most sources suggest a frequency span from about 100 kHz to 1 GHz. You're absolutely right that longer conductors pick up more energy, especially from a broadband event. I would rephrase your comment about wire and circuit trace resonance to say that they have to be an appreciable size in relation to the wavelength of the incident signal. Usually, the rule of thumb is that if the conductor is 1/10 of the wavelength or longer, it will efficiently receive (or radiate) energy. I appreciate your comments.

[@fostardust8284]

how about testing against common frequencies like wifi 2ghz and 5ghz?

[@disasterprepper]

Unfortunately, my generator only goes to 1 GHz. From my experience, typically things that don't shield well at hundreds of MHz don't do well at higher frequencies either. I do plan to do some 5G (tens of GHz) testing this fall using some other equipment.

[@brucefoley1658]

What about a cooler or like a bag to keep your pizza warm

[@iceemadcap4607]

God bless and the universe to you doctor.

[@eleranalimitless2363]

What material could be used for UHF frequences protection. Faradey cage could be made with polyester+silver fabric?

[@ladymercy5275]

It's less a matter of micro-geometry of the composite elements, more so the macro-construction of the antenna or the shield. As is, that Mylar blanket _will_ dampen electromagnetic frequencies, but only above a relatively high frequency threshold. If he were to converge the antenna's directional gain to a tight beam via a parabolic reflector that was aimed parallel with the Mylar blanket, or if he folded the material like a curtain blind and kept the antenna's radial transmission waveform demonstrated in this video--if either of those conditions were met--then the threshold at which the signal would be dampened would occur at lower frequencies and above, depending on the aggregate cross section of the constructed shield. Since the wavelengths tested here far exceed the depth of the Mylar blanket's aluminum layer, they are able to fully saturate during the period of a single hysteresis cycle of the signal generator that powers the antenna. Ergo, the material becomes essentially electrically neutralized insofar as each individual elemental particle's available inertia to off-set the phase difference of the radially generated electromagnetic wave. In other words, whether the angle of a given photon path is aimed left or right, if it still comes out the same on the other side, then no significant dampening of the generated signal can be observed. But if the beam was focused into a parallel beam, or shield was folded like a curtain blind, then a small divergence in any given photon path generates a relatively higher divergence from how the antenna's signal would be transmitted compared to if there was no shield at all. Like this: [ ϴ + 1 ] =============/ / [ ϴ + 2 ] =============\ \ [ ϴ + 3 ] =============/ / [ ϴ + 4 ] =============\ \ [ ϴ + 5 ] =============/ / vs. [ ϴ + 1 ] =============| | [ ϴ + 2 ] =============| | [ ϴ + 3 ] =============| | [ ϴ + 4 ] =============| | [ ϴ + 5 ] =============| | Note that an optical beam's waveform maps transmission angle (ϴ) injectively with respect to transverse displacement. (+1,+2,+3,+4,+5) which basically means that any given photon path moves transversely with respect to the change in the angle from which a beam-formed antenna radiates its generated signal--i.e. if you point a planar beam north, then oscillations in its frequency modulation causes a proportional transformation in its electromagnetic flux in the east or west directions. All that's just to say that my cute ASCII graph there _is_ technically accurate. *tl ; dr* Make it corrugated enough, and you can essentially use any lustrous composite for your electromagnetic shield's construction. 👍

[@lronhubbard8580]

No it has to be mylar

[@s.picone]

Can I just stick my important electronics in my oven? I live in a trailer and my home is made of tin shed material. Think I’ll be ok?

[@disasterprepper]

While it might offer a little shielding, I don't think it would be adequate to protect most electronics.

[@s.picone]

@@disasterprepper Oh ok thanks for the reply. What if I wrapped it all in tin foil or that Mylar stuff, then I am probably good? I just want to keep my crypto currency ledgers safe because it has all my money on it. I’m worried

[@disasterprepper]

@@s.picone Wrapping in aluminum foil does a good job of shielding.

[@s.picone]

@@disasterprepper Awesome ! It will have to do, I can’t afford anything else at the moment. Thanks for helping me out. This is so stressful, I’ve been through a lot already with the pandemic financially and now this. I pray it doesn’t happen but the World Economic Forum is telling us it’s going to, just like they did with the virus before.

[@oladeegriffin7434]

What about a 7 mil 5 gallon mylar?

[@disasterprepper]

I've only tested thin mylar space blankets, and they didn't do very well (about 10 dB shielding). The reason is that the sputtered metal is just too thin. I don't know about a 7 mil mylar bag.

[@Beelzebububble]

Request: Do you have the equipment to see if EMP effect phones, solar panels and battery chargers? I'm seeing some videos where an EMP pulse was applied on top of a phone. Phone scrambled, than rebooted and is fine. Thanks.

[@disasterprepper]

Generating a true EMP pulse requires a very expensive lab simulator. I don't have access to one. Some devices likely would survive an EMP, but it's hard to say which without truly exposing them to a true high-voltage EMP.

[@Beelzebububble]

@@disasterprepper Thanks for the reply.

[@thepuzzlebox6620]

@@disasterprepper You can generate a decent emp with a capacitor bank, a transformer and a coil. Exercise a little caution when triggering it, although. I recommend using a timed switch.

[@adcaptandumvulgus4252]

thanks for informing us

[@tomarthur676]

That is surprising. Just guessing that the skin effect depth is too shallow.

[@harveyblack2699]

Interesting. thx.

[@tarapos]

Another great video

[@disasterprepper]

Thank you.

[@johnhorne3457]

jwh When do you think we will receive our units

[@disasterprepper]

@@johnhorne3457 It's currently at UL. I've been answering their questions on a daily basis. They're trying to determine the best way to test the breaker tripping action. I can't say how much longer it will take, but please know it's moving forward.

[@Pampered_gal11]

Are they flammable ??

[@zerobow9413]

HA nice one you saved me $50 worth of mylar foofoo, wanted to wrap my Escooter in the trunk [if the car dies] guess i`ll be using SS material etc thanks for the vid !

[@diggydice9041]

My feet feel sunburned, skin tight like I'm swelling. Deeper muscular issues that cause severe swelling of the ankle/legs..... led me to check for blood clots on 3 separate occasions but over 2 years no Dr has any clue what is happening. Do I need a "Meter" to help me determine where I can move & what products I must buy to shield me?? Guide me to what I need? I can't buy blindly as I've not got monies to waste. Thanks for your work here.

[@disasterprepper]

You could buy a meter I suppose, but you'd want to get one that could measure at least up to several GHz. That won't let you detect 5G, but it will let you see what wifi and other signal levels might be. Alternatively, you might consider having someone come with professional test equipment to determine what the field levels are inside your home. That would, at least, help you to know whether or not, you are being exposed to very high levels of electromagnetic radiation. They do sell conductive cloth sewn into canopies that can be hung over a bed, but they're not cheap (Perhaps $900 or so). They won't fully block all RF either, but they would reduce the field levels below at least a few GHz. i'd be careful about concluding that your issues are related to electromagnetic radiation, as there could be many other cause. Again, taking some time away from the home might be a good way to determine if it is environmental.

[@diggydice9041]

@@disasterprepper ~ My mom & I both are effected greatly & we left last Wed. staying out Wed night & returning Sat. morning. The symptoms were gone while out & came back by Sunday at 4am. IF I were to buy a meter & I'm looking at doing it for finding out how bad it is & to make sure the place we move to isn't as bad or worse. Also I'd rather buy a decent meter that would cover All the ranges that would need to be addressed // I need a meter that's not hard to use or calibrate & if you've got an opinion on 1 then by all means send me a link. I only know I want to be able to determine 2-6GHz plus any of the other bad you'd deem as a health problem. All I know is that I'm going downhill & so is my mom but no Dr knows what is wrong? Hey, thank you for the help .... this has been fighting a ghost. peace

[@disasterprepper]

@@diggydice9041 You'll want to get a "spectrum analyzer" that covers the frequencies you're concerned about. Spectrum analyzers can range from a few hundred dollars to tens of thousands of dollars. One very inexpensive model is the RF EXPLORER MODEL 6G COMBO. I've never used it, but you might check it out. If you happen to live close to Yorktown, VA, I could probably just come and take some measurements for you.

[@diggydice9041]

@@disasterprepper ~ Ok. I know I have both 2.4/5G networks available to my Xbox1x & my Laptop. I have secured WIFI for either & both of these devices will hook up on either protocol. We've had the 5G since 2017 so that's why I Think I might need to have that ability?? I looked on Amazon & there are Tens of Dozens of units...... I cam spend up to $350 but I want something that's got easy to read & use functions and even a graph or other type of pictorial view of signal strength? IF any of what I've said makes sense, please help get me on a path. I'm going to check out Consumer Reports to see if they've done any evaluations of these meters? Again, I thank you w/ all my heart.... this has been awful for over 2years now. peace

[@diggydice9041]

@@disasterprepper ~ I'd have paid you to scan my place but I left the N.Virginia area in 1998 after 12yrs living there. IF you have Patreon I'll donate to you. diggy

[@Frank_K4FMH]

Have you tested the delta dBm values at HF or lower than 100 MHz? How about 1 MHz (broadcast band) and 20 MHz?

[@disasterprepper]

I have tested some shielding all the way down to 100 kHz, but I don't know that I did for the mylar blanket. It's not so relevant to an EMP though. The reason is that the wavelength of a 1 MHz signal is around 300 meters. Even if you assume energy transferred efficiently at 1/20th of the wavelength, you would need a conductor around 15 meters long. Anything smaller than this not couple energy into it very efficiently. 20 MHz is a bit more relevant, but I don't believe the blanket would do well. With that said, perhaps you had a different application in mind.

[@Frank_K4FMH]

@@disasterprepper Thanks for the reply. Yes, actually I was thinking of a different situation in practice but consistent with your design principles. I’m investigating the “Faraday Cage” properties of foil-backed radiator barriers in roofing for attic antennas used in HF amateur radio. So I was curious as to the frequency variation in your delta dBm measurements. Your ranges seemed to be relatively invariant but I’ll construct a somewhat similar experiment to assess this use case. I was delighted to run across your rigorous work.

[@disasterprepper]

@@Frank_K4FMH Ah, that makes sense. Lower frequencies (as in MHz to 10's of MHz) are easier to block, but the shielding levels that can be measured are often limited by the test equipment. For example, my test setups often limit me to a maximum of 50-70 dB of shielding able to be measured before the test equipment starts to limit things. The reason is that you have to turn up the amplifier really high to couple the energy into the short antenna on the analyzer. There's lots of ways to improve this, but I won't go into that.

[@mrthomaslaux1]

Thx