I just wanted to tell you, that I’ve been a subscriber to your channel from the beginning. I believe you were the first channel I ever subscribed to. I always enjoy your videos, thanks for posting them. 👍👍👏👏✌🏻
This is a bit off topic. But I just watched your video of you washing your cloths and bathing out doors in Norway. Why not just bring a portable bath tub if you plan on staying long? You can heat the water and have your own portable spa. tinyurl.com/ydd9hpeo I saw one on that TV series "MASH" It was a fold up one made out of what looked like canvas and folded up like a cot. Anyway, why not make it a little more comfortable to bath outdoors?
As an RF engineer, I can attest that this is one of those subjects that has lots of miss-information floating around the internet. Something to keep in mind when building a Faraday cage is that EMPs, while broad spectrum, don't have much power in the EHF range. So worrying about small holes (1mm or smaller) are not a big deal. However, nothing wrong with perfection. On your can, I would make one recommendation, the ground wire poked into the can like that isn't a good idea. You have just created an antenna inside the can that will transfer energy into the can. Your ground should instead be bonded to the outside of the can with solder. Other than that great video.
I'm an Electrical Engineer , but I don't do any RF stuff , but wouldn't it just be pretty sufficient to just wrap the electrical devices in a couple of layers of aluminum foil ?
The rubber seal on the can wouldn't decrease anything, there is still metal to metal contact there is just no reason to strip the paint you'll more than likely get perfect conductivity through the hinge anyways. The rubber is fine the whole point is to insulate whatever is inside just some basic cardboard will insulate it fine.
Good video Lilly, I used to be an electronic technician in the CDN forces. My job for a while was installing telecom center all over the place. Those places were made like Faraday cages so I have a bit of experience in this field; - first the EMP waves lenght are longer than 1 mm, so little gap between the cover and the box wont matter too much. The best material to use to seal this gap is copper desoldering wik that you can get in any electronic supply store, - Wire size is important but remember that the point of contact between the wire and the ground must be solid not just twisted around it. If you can use a hose collar to tighten it to the ground rod or the pipe you use. Ground rods must be driven at least 1 meter in the ground to be effective. If you can, use a wet or moist ground area the put your ground rod. This will ensure a better contact to the ground. Make sure your mechanical connection between the ground rod and the wire are solid and don't come apart easely, - The best way to join the ground wire to the box is to drill a small hole in the box, remove the paint around the hole and insert a bolt through the hole with metal washers on both sides. Then use a self locking nut on the bolt and make it tight using a crimp on terminal to attach the wire to the bolt, - Here in Canada, the building code requires us to have a mechanical ground to the earth. Normaly it is done through the water pipe in the city. If you are out in the country, sump pump must be installed in case water level from the ground rise higher than your floor. In that case you can buy a copper rod from a building supplier and insert it in the pump well, - Inside the box, use some rubber from a tire trip to line your box. Cardboard absorb moisture, rubber don't. Also use ziplock bags to wrap your electronic equipment. When you want to check your equipment it is easier than if it is sealed. I hope those points can help all the friends on this channel. Be safe out there. Lilly your are quite a lady and I wish I could meet you some day to talk outdoor and archery.
As an electrician and electrical engineer, there is one major design flaw with this. That is the clamping join on the earth to the box via the lid. Yes it will dissipate energy far better than without one, but if the current is as high as you think it would be (Ie. The reason you think the larger gauge cable is important) it will melt the aluminium almost instantly and possibly burn the cable off the box due to the poor connection that will follow. Best way to do this would be to drill a hole in the box and sand the paint off around this area, then put a bolt through and use a crimped connection to terminate the connection with the cable and tighten this onto the box with a nut. Doing this should not compromise the capability of the box, if not improve it. Secondly if this box survives an EMP of this magnitude, I can guarantee that the mobile phone towers in your area would be toast also, making your phone that is safe in the box useless as well. Walkie talkies (or any radios) are a good idea though and a GPS to a much lesser degree. Keep up the good work!
So some guy in the comment section mentioned that what she's doing with the ground wire is actually just worsening the effect of EMP because the wire is sticking out inside the box and acting as an antenna, and further recommended to just scrape off the paint of a little section on the outside surface of the box and solder the wire directly to the exposed metal there. My question is whether your recommendation is also acting like an antenna (because you suggested to drill a hole and plug the wire with a bolt) thus worsening the effect of EMP, or are there some misunderstanding in that "just solder the wire" suggestion? Thank you in advance.
keith moore it is quite evident that you have no idea what you are talking about. GPS satellites orbit 20,000km above the earth (that would require a bigger surface emp event than has ever occurred and is about two thirds the circumference of the earth). I can almost guarantee that the system will not totally be taken down. Even if there was a nuclear event in orbit, the gps signal may be patchy but by no means useless as the satellite obits are not stationary.
Y H No not at all, grounding the equipment will dissipate any unwanted RF frequency far quicker than the box itself doing all the work. I can understand the idea that this could act as an antenna in these situations, however there is a massive chunck of metal under our feet called the earth. It really wants to suck in noise and voltage if you give it to it. I cannot stress this enough. The previous site I worked at had many large VFD's located quite close to sensitive instruments, the solution was to make the switchroom into a massive Faraday cage and earth the crap out of it. The reason for this is due to the switching rates that VFD's throw out which in turn induce noise into instrument cables. Soldering a connection would be ok, but if you have ever tried to solder a small copper cable to a plate of steel, you would understand how difficult it is. Secondly soldering is not always ideal if the join takes current, as it will heat beyond melting point and create a hot join (extremely rare cases but can be eliminated by bolted joins). Hope this helps.
keith moore While an orbital strike is certainly possible, I have trouble seeing how it could be useful to anyone. Nuclear strikes on ground targets makes alot more sense, and I can tell you that with well over 60 nuclear surface detonations since 1990 there is no logical problem here. For example, the only event that has the ability to cause a half planet wide outage would be from a massive solar flare (if that happens the emp would be the least of our problems). Nuclear detonations are surprisingly small with regard to emp effects in atmosphere. Anything bigger would render a Faraday cage useless anyway.
If you are using a ammo cans as a Faraday cage, check the bottom of the can. Many modern can bottoms are not completely welded. If yours is spot welded or not completely welded, use aircraft brand paint stripper to remove the paint on the outside of the bottom. Clean it well after the paint is stripped. Then place solder flux into the weld gaps and then solder all along the bottom. Repaint the bottom. There needs to be no gaps at all. Also use solid core wire for the ground. This wire is easily obtainable from major building supply stores. It is standardly available as in wall house wiring. Many supply stores allow you to buy it by the foot. The flexible wire Lilly is using is braided. Braided wire cannot handle large discharges without burning out. We Love you Lilly! Keep up the great work! Much respect.
I sometimes joke with people by saying "you're on my team in the apocalypse..." But with Survival Lilly, I would hope she would let me be on her team! Love your channel, thank you for sharing all your knowledge of survival!
Been following you for several years, Lilly, and really enjoy your channel. Now you are getting into something I am familiar with. I have been an Amateur Radio (Ham) for over 50 years. When I started in it, a lot was using vacuum tubes. EMP will fry solid state devices with transistors and intergrated circuits (IC's). One should get an Amateur radio license in your country and find older vacuum tube equipment that works. It should be much safer from a regular EMP situation. The only problem will be how to power it. It would take too much current to run from solar cells unless you have lots and lots of them and batteries. The generator stored in it's own Faraday cage would solve that problem. And like the one commenter mentioned, re-cycle out the stored gasoline.
Just a question. do you need to replace the gas monthly if you use non ethanol gas with sea-foam added to the fuel? I am pretty sure the fuel would stay fresh for many months as this is how I winterize my small engines & they all start easily in the spring.
Since I've been watching your videos of how to survive among other things, I've learned a lot from you and I want to thank you. You are my new hero I am looking up too. I can now use some of your skills next time I go camping, fishing and a few other things. I'm going to surprise my Step Dad of the things you taught me. My step Dad served in the Air Force and he as well know a lot of things. Again thank you survival Lilly and May God Bless You.
Hi Lilly, just thought I would mention that the lid on those ammo cans will pop off easily when you open them up, just push the lid to the side and they come right off the hinge pins. Just to make it easier on your next one, instead of having the awkward box attached , I really enjoy your videos! keep them coming.
Wow Lilly, you did an excellent job explaining that. There are small Faraday cages available to consumers to protect credit cards and computers from digital theft. Those are great for low wattage radio signals. They don't need to be grounded because of the low energy involved. However, in the case of an EMP, the wattage can be so high, it can actually burn or melt electronic components from the inside because the electricity literally bounces around inside the circuitry randomly and colliding with itself. Grounding your Faraday cage from an EMP redirects the energy into the earth and away from your devices. Normally, I discourage people from using aluminum foil for a Faraday cage. Why? Think about foil in the microwave. It's wrinkles, folds and creases cause the electrons to bounce back on themselves and then colliding back into each other creating short circuits back onto itself. It has the potential to catch more EMP than it will protect from. BUT when you ground foil properly? Electricity always follows the path of least resistance and goes into the Earth and away from your devices. Properly grounded foil can protect much better than foil alone. Thanks for this video Lilly!
My opinion - ground it using the electric socket and use a safe as a big metal box. Buy an electric plug from DIY and connect only the ground pin so it relatively safe
Caleb Samuel I have 4 of them just for that event...im afraid an EMP will damage the panels tho-Wut should I do to protect them? They are larger than an ammo can 😞...any thoughts?? I also just purchased a windmill generator..and im not sure about that either. Im contemplating simply sealing them up then burying them..or perhaps wrap them in chicken wire..
I meant like the smaller Solar panels I live in the USA didn’t know if y’all have them or not I’m just know learning about all this so I’m no expert it was like a question seeing what people would say . Thanks for answering
The federal government has tested all kinds of things like this solar charge controllers actually tend to do fairly well during an EMP so do batteries nothing and out of 29 automobiles that were tested only one had a catastrophic failure other ones had what they called inconvenient issues like the relay for the windshield wipers burnt out but the car would still run start and drive but solar panels on the other hand they did not survive they would have to be in a faraday cage completely unhooked until after the event
Lilly, you are very well informed about what many people don't even know about. Kudos to you for leading the way. What you say is very true, an EMP is very dangerous and has already taken out satellites and power grid equipment on various other occasions and will do so again. I applaud you for raising this subject. Your ammo can design has a few people picking at it as faulty, but it will be very good in practice. Inside the 'Faraday cage there is no field strength at all. it does not need to be lined inside with insulation, nor does it need a ground, but there is no harm in doing either, you are welcome to do what you think is right. We'll check up with you after the next 'event'.
Ovens and a Grille? I wouldn't trust that Army lead paint, nor ingest any foodstuffs coming from that inedible death in a box. If you sandblasted the interior and exterior, then have'adder. Otherwise, R.I.P.
Nice vid with lots of tips and would mean a lot for a lot of people, thanks. Another tip I would like to add is for you to drill a hole through your outside wall and connect a wire onto a copper pipe knocked into the ground, bringing the wire into your house for a proper earth and connecting that on a metal plate, preferably copper. By cleaning the paint off the bottom of your farraday cage to ensure contact, place it on the plate and thus giving you access to it all the time and grounding your cage.
Lilly, One way to check if your seal is perfect is to put your cell phone in the box and then have someone call your phone. If it rings, then you don't have a good contact. Another way is to put a portable radio in there.Turn it to a station and if you close it and can still hear a station then you have a problem.
Hallo Lilly aus Ermangelung an Englischkenntnisse in deutsch ;) Tipp: Verwende eine lange Schraube die du mit Unterlegscheiben fest mit einer Metallkiste verschraubst... Verwende zwei weitere Unterlegscheiben und eine Flügelmutter in der du dein Kabel einklemmst und per Hand fest anziehen kannst... Also: Schraubenkopf - Unterlegscheibe - Metallbehälter - Unterlegscheibe - Mutter - Unterlegscheibe - Kabel - Unterlegscheibe - Flügelmutter die Flächen des Metallbehälters, die die Unterlegscheiben berühren sollten blank geschliffen werden... Das Kabel würde ich unter ich unter die Rohr schellen klemmen... Dazu einfach die Rohrschelle lockern die Kontaktfläche mit Sandpapier etwas reinigen... Diese Fläche kann mit etwas Fett (Vaseline besser Kontaktfett) einstreichen... So wie du es gemacht hast geht natürlich auch... Wollte nur mal etwas Klugsch.... ;) lg André
Thank you for your training! Under YOUR training, I built one of these today by following your instructions. I even have it now grounded to my 10 foot grounding rod. Thank you!!
you are the best youtuber and got me into the outdoors can you do more fishing?!!!!!!!!! THANK YOU I'm only ten and I have been with your channel since I was 7 please respond i love your chanel!!!
One would want to download local maps into their cell phone. Reason is if the cell towers are down...the GPS satellites could still work (probably). So if you have your maps on your cell phone, then mapping and destinations and walking routes would still be vital information that would work. You wouldn't have to rely on the lucky chance cell towers were working, let alone servers with mapping data, to download mapping information.
Another layer of protection could be to wrap each device you put inside in aluminum foil as well. You might consider placing them in ziplock baggies, or vacuum sealing them to prevent possible moisture damage with changing temperature/humidity levels now that the ammo can is no longer water tight.
Also, if you have it or can get it, Aluminum tape. It is similar to duct tape but has an aluminum back. Tape over any parts that may have a gap or all the way around your lid. The tape blocks the waves from getting through any gaps.
This is a very useful idea! I've got the amo-can and was planned to make the compact wood stove but I change my mind. I should make the Faraday Cage first instead of stove.
Lilly, great video. Since I'm kind of a prankster I would have said "now let's test it". Then I would have shown me walking into afield, set up the ammo box, camera view from a distance and showed. A nuclear exploration. Then said unfortunately placing my ammo can so close to the EMP source, I didn't calculate for high heat intensity.
Lily, who is the manufacturer of the walkie-talkie with a radio? Thank you in advance. Don't forget to put a supply of batteries in your cage. An EMP will drain batteries in an instant. If you continue with such subjects as this, you will receive another video award!
I have heard of the rays coming from the Sun and affecting equipment in buildings and my home have a ground outside connected to a grounding rod. I never thought of making a Faraway Cage though, but probably should. The one you built looks nice and thanks for sharing this information.
I got ammo cans years ago for $3 each. So I used a couple to build Faraday boxes. I wrapped 3 modern HT's and a portable shortwave receiver in aluminum foil and stuck them in the boxes. Then I put the boxes in the basement, just in case. But mostly I rely on having old a couple of tube-based transceivers to deal with possible EMP.
I think if there’s an EMP or CME powerful enough to permanently knock out a mobile phone and it’s charger, the phone masts will be wiped out which will render a protected phone useless anyway. An old microwave oven is an ideal container, it’s shielded on all sides and has a ground connection. Just disconnect the positive and negative wires from the plug or remove the Electric’s inside leaving the earth cable.
many microwaves do not even protect from phone signal waves from getting through. many tests have been done on this subject. (which also means the micro waves are getting out as well.) try it yourself, put your phone in the microwave, then call it from another phone. if it rings, its not protected. In any case, phone waves are much lower than any EMP would be. thus still frying the phone.
@@kayci2058 Been testing household appliances and kitchen utensils. with two mobile phones. My microwave oven fails as Faraday cage. The statement by "Edward Snowden" about using microwave ovens as a fafaday cage isn't 100% correct then. I did try a baking tray for biscuits with a stainless steel mixing bowl on top. Then put a mobile phone inside. This happened to work well as emergency faraday cage use.
Lilly ! I have a challenge for you . How about building an overhead cover and reflector to protect your fire during rain storms ? ( upgrade for your survival shelter )
Thank you for this video. I have enjoyed every one of your videos that I've seen so far. I am subscribed because you give real life experiential knowledge. Also, I find your confidence inspiring. Please keep doing this. It is appreciated. God bless you and your work. Peace Everyone.
Ever consider bonding the lid to the case with wire? You'd need: - 2 small bolts with nuts & washers. Drill one hole in lid, one in case... both very close to the hinge. - Get a short, heavy gage wire with an eye-ring on each end - Bolt the jumper wire from lid/case. Because of the overlapping flap on the sides of the lid I think you'd still have an extremely effective full coverage cage. And you'd still have the gasket to help keep your stuff dry
Another awesome video Lilly! I always love watching your videos because it's actually informative and i learn something very useful from it. Thanks for the awesome video!
FOOL!... You're candy bar will melt after your matches ignite when the EMP causes immense heating from your bad ground. Now all you are left with is a pile of burnt ant bait and a sticky knife!
I haven't gone threw all the responses sooooo... I see a few flaws. 1) if a EMO happens your still sol. The power grid will be down for a huge area. Chargers won't work to charge you devices. The cellular system will be gone. So no phone will work but yours. No oned to call as there phones have no service. Your power cell takes a long time to charge. Again radio wil be dead. Your car will be dead. EMP's are nasty, and wide spread. Not trying to put you or your video down. A lightning rod possibly not be heavy enough. The tin foil i doubt will survive the amount of current going threw it. Just like the wire you used for your ground. All good info Lilly. Love your channel. So much great info on it. Jerry Wish I knew how to know if a response is left to this.
Love that you are becoming more of a prepper. You have inspired me to build a bug out camp. I am a prepper so this will be great. Would love to build a little off grid cabin in remote northern wilderness close to my home in Canada.
Most EMP protection containers are like body armor. They will only protect you to a certain level. An EMP burst comes at varying magnitude and frequency and it could be very high frequency. Because containers need to be opened and closed, they are not always fully sealed to RF. This is not a huge concern. Yes, the grounding connection should always be attached to the outer shell. The steel ammo can makes a nice EMP container.. Just a thought. Thanks for your video.
Rather than cardboard (which could absorb water if there is ever a leak or if the can is opened in the rain, etc.) use reflectix-type material - (essentially bubble-wrap with a foil coating on both sides). It is cheap (building supply store), water-proof, and potentially adds extra shielding as well as cushioning. It also makes a good addition to a sleeping pad, and I used it to make for a cozy for my camping cook pot, for making sun shades, etc., so you'll find lots of uses for the extra you have from buying a roll, or maybe you can find enough scraps from a builder or contractor somewhere.
I think the foil on that stuff is aluminum - so it could possibly carry some charge to the interior. How about foam core? It does have paper on the surface, but the guts are foam, so it will cushion your goodies like carboard, but would be less absorbent
Recomendation: I keep the weather proof seal on all my ammo cans to keep water and rain out. What I do is wrap all individual components with 3 layers of aluminum foil, after I seperate the batties from the device. Then I make the outside of the foil with a lable of what was wraped within and the date. The individual components are protected. Please note that the batties or power source must be seperated from the components when you wrap them. If it is possible have every device 2 or 3 times. Take oiut only one after and EMP and protect the others for multible EMP attacks.
A old way of making a good R.F. proof box is to put "finger stock" around the edge. Dont know if it is even make anymore, Test the box by putting a cell phone in the box and call it with another phone and see if it rings. It should not.
Thank you for this excellent video. A few minor points: I would not connect the Faraday cage/box to your home ground. This would act counter to the purpose of having a Faraday cage. Keep the Faraday cage in your garden shed. Connect it only to the grounding rod you drive into the Earth. Do not attach this ground line, or any ground line, or any other conductor to the conductor that connects to your lightning rod. Given a lid and box made of some (doubtless) ferrous metal, the connection of the lid and box to the gasket made of aluminum will almost certainly corrode. Adding the copper wire in contact with the aluminum and the ferrous-metal box will also create a point of corrosion. Braze the flat heads of some steel bolts to the outside of the lid and the outside of the box. Use electrical connectors attached to the bolts to enable an electrical connection between the outside of the box and the outside of the lid. Put another connector on one of the bolts. Use that connector to attach a substantial ground wire (6-gauge) to a five-foot rod driven into undisturbed earth, which will then act as your ground. I would do this all in a shed, not in my house. Do not attach this ground line, or any ground line, or any other conductor to the conductor that connects to your lightning-rod. The conductor attached to the lightning rod is not a ground. The conductor attached to the lightning rod should not be connected to a ground/the Earth. The purpose of the lightning-rod system is not to provide nor to serve as a ground, nor as a connection to a ground/the Earth. The lightning-rod system's purpose is to gather all of the static-electric charge that develops on your house and dissipate it through the lightning rod(s). With its static charge thus dissipated through the lightning rod(s), your house presents a (literally) less-attractive target for lightning.
Once they get fixed... There is the crux of the problem. Very little of commercial spares are packaged to protect against EMP. As such, it could be 10 years before cell service is restored.
Great video ! Thank you for the heads up and knowledge ! One potential problem I see is condensation. If this box is taken to say a bug out location. In a cold climate. There is a good chance the inside of the box will condensate. And the cardboard will get wet . Which creates many more problems. IMHO. If neoprean foam was glued to all sides and lid and bottom. It would provide R value insulation which will help batteries . And it will eliminate condensation. The condensation problem with sealed metal containers is very real. Especially ammo cans as I have had Many things get ruined in ammo cans from condensation over the decades.
Good morning!! Here at work with a cup of coffee in my office, watching your vid. Awesome content ,never gave a emp a thought but will consider!!! Thanxs!!! :-)
Lilliy and all, I plan to split my comment into two parts. Two different subjects that may garner further comment: For starters, the question is, "to ground or not to ground?" If you choose to add a ground, please understand that the wire you add to the metal container is itself an antenna. This is also true for the power cord on an appliance, TV, computer etc, etc. The entire grid is a giant antenna. (google the great solar storm of 1859.) If you choose to add a ground, sand off some paint, drill a small hole and use a well-cleaned steel or brass bolt and nut for the attachment point of the ground wire. That way you have a good mechanical bond. Even better, use some flux core electronic solder and solder over the nut and bolt connection, allowing the solder to flow into the joint by capillary action. This will give you the very best low resistance connection. Also, it would be good to drive a separate ground rod well away from other grounding rods. Drive it deep into moist soil. You WILL NOT obtain a good ground in dry soil. Adding salt around the ground rod will temporally attract moisture but is only a short-term fix at best. A ground rod driven deep into the moist soil is your best plan. Also, a scrap copper plate with a good mechanical and soldered attachment buried deep where the soil is moist will work well as a ground. A final thought, nest your equipment. Our more important items have multiple layers of protection. For example paper wrap and foil around a tablet or cellphone. Another insulating wrap and the unit is placed into a tin or small metal box and sealed with metal tape. The doubly protected unit then goes into the larger metal box with its own insulating layer. Far more protection than a single cage will provide.
Part two : Lilly and all, The cell phone may not work if the power grid and or the cell network become damaged. Still, a cellphone or inexpensive tablet will have many other uses. Well trained and prepared individuals will have survival knowledge. What about those who are new to preparedness? I suggest loading first aid books, survival books, military manuals and any general how-to books covering your weak areas of knowledge onto flash drive // memory sticks. They hold a lot of information and take up little space. Pack them in a nested fashion (see my first comment above) inside your EMP can. Include an inexpensive USB cable adapter to connect to your cell phone or tablet to the memory stick. You now have a complete survival library to reference and a "reader" to do so. Not as good as knowing what to do by instinct and practice but still a great and inexpensive part of preparation. I would also suggest adding a compact folding solar panel in the EMP can, it will charge your small devices in a grid down situation.
I am also an Electronics Communications Engineer and I agree with the ground wire suggestion. Small holes do matter however. A an example brass screens are incredibly leaky. 1:46
Arthur's videos are top notch and well worth the time to watch. He's the only person I've ever seen that uses the scientific method to test what he's explaining. Good stuff.
It is right, if talking about an older type of car, with an all metal body. Those you are perfectly safe sitting in the middle of a thunderstorm. I have done that quite happily a number of times. Don't try that with a modern car though, as many use different materials in the body panels, so the Faraday Cage property does not work. Note that none of this is claiming that a car would be any use for an anti-EMP Faraday Cage. Stuff in the boot may be OK? I would defer that point though to the better qualified folks already speaking up in other comments. Get a really really old car though, which is not reliant on computers or electronics, and the car itself will be EMP proof. That or some purpose built kit car, without such components. For those who are planning on bugging out by car. Petrol pumps won't work mind.
Your video was about the car getting hit with electric arcs, while IN a Faraday cage, not that it is a Faraday cage itself., Not quite the same. If your cell phone works from inside the car, then you are vulnerable to EMP. It is a matter of Wavelength of a freq and the power levels. Most of the enery of an EMP is at Cell Freqs or lower. While lighting can still fry you in a car, it normally follows the metal body around to ground. That is the deal with not stepping out of a car with power lines on it. Rubber tires insulate then when you step out you make the path for current flow.
Tom Popp, there was no Faraday cage visible in the clip. The vehicle was inside a building, in which the electric arcs were being generated. That was not a very good video though as the pertinent bit was only a second. Here is a better one: th-cam.com/video/ve6XGKZxYxA/w-d-xo.html&ab_channel=BBCStudios
Nice video but some important notes: Electro-Magnetic Pulses (EMPs) are not just electrical, they are magnetic too. The EMP pulse is generally (but not exactly) a half sine wave with an electric field and a magnetic field that is perpendicular to it. What does that mean for non electrical engineers? Simple, it is not just an electrical wave pulse, it is magnetic wave pulse too. The Ammo Boxes are a good start for making a Faraday Cage (which is what you are making to block and shield EMPs). The reason is because the Ammo Boxes are made of ferrous metal like steel. Mu Metal would be better but not practical. Aluminum may block/shield most electrical waves and currents but magnetic waves can still get through. Try holding a steel washer to the other side of Aluminum foil folded a few times and a strong magnet on the other, the washer will be strongly attracted through the foil to the magnet. Now try it with steel, like the side of the Ammo Box, the washer will have much less attraction, if at all. Of course this is DC and EMPs are high frequency AC with many characteristics, but it demonstrates the point. Don't use aluminum as a gasket in your Ammo Box Faraday Cage, it will leak some of the extremely strong EMP through. Nuclear EMPs are thousands of times stronger than EMPs we get from the Sun on Earth. It is better to find some fine mesh steel braid and use that for the gasket. The best are for RFI/EMI/TEMPEST applications. Also, when a nuclear EMP occurs, eddy currents will be introduced in the steel, so you need at least 1 inch (25mm) of cardboard all around the interior of your Faraday Cage to protect your devices from the eddy currents. Also, a thin layer of ESD foam is a recommended. Look for "Ammo Box Faraday Cage" for details. I tested my Ammo Box Faraday Cages to have an 80dB attention at 100MHz 1W wave at 10 meters away. With aluminum foil as a gasket, that drops to only a 70dB drop which means 10 times the energy gets through with an aluminum seal. Actual EMPs have some higher frequency components but this is my baseline based on the equipment I have. The rest can be extrapolated from actualy EMP data, but that is mostly classified. It's not a good idea to hit your Ammo Box with hammers, it is best to keep the box edges as true as possible and have a good fine mesh steel gasket that makes perfect contact between the "sanded" case and lid all the way around. Finally, the Faraday Box (now that the rubber gasket was removed) may not be air tight, moisture can work its way over time. Remove all batteries and store them separately from your devices. Put some desiccant packs inside to absorb moisture, then seal the whole box in a vacuum bag or similar air tight wrapping. The idea is for long term storage of your electronics and NOT open it until the EMP events are stopped - usually within the first day of a full commit nuclear war. But not a bad video, it will work, but why risk it when it can be better.
Why are you suddenly interested on these topics? Are you expecting for a EMP (maybe) from the sun or artificially produced? It is quite different from your traditional videos :O
She's never done anything like this, yes. I think it might be about being prepared for as many scenarios as possible and a solar flare is certainly not out of the question. Probably more likely than the fall of society.
She has always been interested in disaster preparedness. Hence, the 'Bug Out Shelter'. This is merely another facet of that. She does use quite a bit of electronics in her activities so this is prudent, IMO.
She did a video with Patriot Nurse, which is pretty much all "What do we do during the Apocalypse?" stuff. Also, whenever she uses the term "bugout" (bugout bag, bugout vehicle, bugout shelter), in this context it refers to getting out of the city when something terrible has happened.
You can use aluminum tape around the can to seal it, and you can make a grounding rode from a 4' 3/8" rebar. Make a small repairable hole in your home and run the wire through it to the outside. This kind of grounding system can also be used to protect short wave radio's from lighting strikes.
You actually think your electronics will work after a nuke explosion or emp? You're better off making a bird cage. What wifi or cell phone towers are you going to use these electronics on? Cause that emp is going to fry everything that makes those said electronics work. Faraday boxes are better used for spying eyes or goverment paranoia.
I searched for the information so I can build a cage for something bigger. Still, I think even a small can like this would be great for an inverter or maybe a couple of small wet cell 12 volt batteries. But I agree with you about trying to protect a phone or tablet. If the internet is down along with the entire power grid, then having a phone isn't a priority.
Can anyone tell me the best cheapest materials to protect an entire room? Like actually protect it? I am installing them in old folks homes. Please help
Another good thing to add would be a flash drive with important documents possibly encrypt the drive for safety. Maybe even a solar charger to charge your battery bank as well.
Awesome video sister. You're the right trail with modifying original seal. Conductive silicone (metallics added in) fabrics and cords may increase effectiveness of seal and ease of build. Probably can leave original seal in and build around it. No hammering required. Thank you!
I'm also an engineer watching this. Older microwave ovens made in the '80's make decent Faraday "Boxes". Cut the power cord as close to the chassis as possible, and cover w/ metal tape. Line the inside with thick foil to augment EMR shielding. The seal around the door is the weakest point. Seal with metal tape. You can test your Faraday box's range of RF shielding by using a small AM radio (longer waves), and a cellphone (microwaves).
Also a good idea to have a faraday cage in your bug out vehicle with spare electrical components that may get your vehicle going again following an EMP situation.
Update: A metal trash can works very well. You have to use foil tape around where the can lid edge fits with the lid on tight. And around the handles and seams. You might want to use a plastic trash can inside the metal can to insulate the can from what you are trying to protect. Or you can line the inside with cardboard. Not necessary to insulate the inside top of the can lid. When testing any Faraday cage, use a portable radio in it. Tune to a strong AM frequency/station, put it in, close the lid. Do this again but set the channel to FM. Do this again but with a cell phone. If you only hear static or nothing, your cage is pretty decent. NO Faraday cage will protect from everything. Things to put in a cage: Solar generator, portable radios (batteries removed). LED flashlights. Regular old style flashlights do not need a Faraday cage - just remove any batteries. Spare cell phone and charger. Static inverters. Calculator. 18650 or similar rechargeable batteries that are internally protected. Those have electronics built into them. The battery charger of course. ALWAYS use a digital multimeter and check for continuity between the lid and the can! ZERO is what you are looking for. Check for ground too. You can also place other electronics in the can. Just remember, rechargeable batteries usually need to be recharged about every 3 months. Additionally, you can place a few very dry towels in there to help control moisture. About her ammo can problem - roll up some aluminum foil and place around the edge before closing. Another suggestion is the simply wrap the outer lip of the ammo can lid with foil tape. Remember, TEST IT every time you open and close it. IF you want to ground your trash can Faraday cage, simply place it on the concrete floor in the basement. Not perfect, but it will ground it. A thick wire to use if you want to ground yours is plain old automotive jumper cables. If you are severely paranoid, wrap individual things with layers of aluminum foil. Note: Harbor Freight ammo cans DO NOT WORK out of the box.
Good idea. I understand that a galvanized steel garbage barrel with a tight-fitting lid can be used as well. I would want to run a wire from it to a grounding stake pounded into the earth, and insulate the electronics inside from touching the sides or bottom of the barrel. With a solar CME, we'd have a couple of days' warning before the EMP hit. With a nuclear detonation, only minutes, if any. Hope neither one ever happens. Nice demo. Cheers.
I would suggest that you put a solar-powered battery charger in the box, if it does not fit with other items, you can make a Faraday Cage just for it. A solar-powered battery charger would be good if plug-ins would be ruined by EMP as well as source of electricity. :)
Use thick copper foil to line the box. Also wrap each item in a foil wallet. Best protection is to also where possible disable any antennas connected to the devices and also disconnect batteries for long term storage.
Who's here in 2023? haha you can now purchase grounding cables that plug right into the ground (third) prong of any outlet. Just get a small reader to make sure that outlet is actually grounded. Even if your house has a grounding rod, every circuit box may not be attached to it. I already had one of these cables in my house from an old grounding mat I used to use (silver impregnated fiber mat). Thanks for the video!!
Ammo cans are great. I lined mine with wood keep shortwave radios walkie-talkies. Batteries bought a couple of large ammo can that can hold small solar generator. I left the weather seal in didn’t paint it
Not many realize that PVC conducts electricity way more than almost all metals. I learned this while studying electronics, it rates a 10 out 10 while copper and other metals are less conductive, I was shocked (no pun intended) when I learned this fact.
After sanding all paint replace the seal with stranded copper wire, gets even more contact from the lid to the box and you wont have to worry about small gaps in the lid. Remember that a faraday cage without any wire penetrations does not need to be grounded, and any attempt to ground such an uncomplicated faraday cage is simply asking for problems. ... This may work as a static drain or to protect against electric shock; but for an EMP ground it is worse than worthless, it is an antenna.
"if the electrician did good work" Love it. Looks like a doable project, with minimal tools. I suggest adding one of those compact solar chargers to that kit and having chargers that to can connect via USB to it. I could be wrong, but some of those devices you put in there had standard plugs. I suggest committing to devices that can either plug directly into the solar charger, or batteries you can put in a charger connected to the solar device. Now for a serious question: Why not leave the gasket to maintain a water seal, and just sand/grind the sides of the rim and lid to make that contact? I plan to try this project.
i totally know what you meant, but "ask your parents" made me laugh. just the image of me, a thirty year old woman, calling my mom and asking her if she could come help me ground the wire of my homemade faraday cage....hilarious XD
@Survival Lilly >>> FWIW, I never expected to see "FARADAY Cage" as a subject to one of your videos. Good on 'ya, My Dear! *EDIT:* This is just a GUESS - I do NOT know about much about electronics, nor have I really researched this. BUT...electrically conductive gasket material is available commercially. If you wanted to spend the money you could use that to seal the lid on your ammo can versus using aluminum foil.
Get your ammo can here: amzn.to/2JdT1mB Thanks for your support!
Good idea
Survival Lilly it's easy to learn from you than its from school
I just wanted to tell you, that I’ve been a subscriber to your channel from the beginning. I believe you were the first channel I ever subscribed to. I always enjoy your videos, thanks for posting them. 👍👍👏👏✌🏻
This is a bit off topic. But I just watched your video of you washing your cloths and bathing out doors in Norway. Why not just bring a portable bath tub if you plan on staying long? You can heat the water and have your own portable spa. tinyurl.com/ydd9hpeo I saw one on that TV series "MASH" It was a fold up one made out of what looked like canvas and folded up like a cot. Anyway, why not make it a little more comfortable to bath outdoors?
Survival Lilly did you know iPhones are all ready EMP prof ?
As an RF engineer, I can attest that this is one of those subjects that has lots of miss-information floating around the internet. Something to keep in mind when building a Faraday cage is that EMPs, while broad spectrum, don't have much power in the EHF range. So worrying about small holes (1mm or smaller) are not a big deal. However, nothing wrong with perfection. On your can, I would make one recommendation, the ground wire poked into the can like that isn't a good idea. You have just created an antenna inside the can that will transfer energy into the can. Your ground should instead be bonded to the outside of the can with solder. Other than that great video.
I'm an Electrical Engineer , but I don't do any RF stuff , but wouldn't it just be pretty sufficient to just wrap the electrical devices in a couple of layers of aluminum foil ?
The rubber seal on the can wouldn't decrease anything, there is still metal to metal contact there is just no reason to strip the paint you'll more than likely get perfect conductivity through the hinge anyways. The rubber is fine the whole point is to insulate whatever is inside just some basic cardboard will insulate it fine.
@@akai454 Or a coffee refill pack which is aluminum lined :)
@@akai454 i was thinking the same haha
Why isn't a metal shed with a good door a Farady cage?
Good video Lilly,
I used to be an electronic technician in the CDN forces. My job for a while was installing telecom center all over the place. Those places were made like Faraday cages so I have a bit of experience in this field;
- first the EMP waves lenght are longer than 1 mm, so little gap between the cover and the box wont matter too much. The best material to use to seal this gap is copper desoldering wik that you can get in any electronic supply store,
- Wire size is important but remember that the point of contact between the wire and the ground must be solid not just twisted around it. If you can use a hose collar to tighten it to the ground rod or the pipe you use. Ground rods must be driven at least 1 meter in the ground to be effective. If you can, use a wet or moist ground area the put your ground rod. This will ensure a better contact to the ground. Make sure your mechanical connection between the ground rod and the wire are solid and don't come apart easely,
- The best way to join the ground wire to the box is to drill a small hole in the box, remove the paint around the hole and insert a bolt through the hole with metal washers on both sides. Then use a self locking nut on the bolt and make it tight using a crimp on terminal to attach the wire to the bolt,
- Here in Canada, the building code requires us to have a mechanical ground to the earth. Normaly it is done through the water pipe in the city. If you are out in the country, sump pump must be installed in case water level from the ground rise higher than your floor. In that case you can buy a copper rod from a building supplier and insert it in the pump well,
- Inside the box, use some rubber from a tire trip to line your box. Cardboard absorb moisture, rubber don't. Also use ziplock bags to wrap your electronic equipment. When you want to check your equipment it is easier than if it is sealed.
I hope those points can help all the friends on this channel. Be safe out there.
Lilly your are quite a lady and I wish I could meet you some day to talk outdoor and archery.
As an electrician and electrical engineer, there is one major design flaw with this. That is the clamping join on the earth to the box via the lid. Yes it will dissipate energy far better than without one, but if the current is as high as you think it would be (Ie. The reason you think the larger gauge cable is important) it will melt the aluminium almost instantly and possibly burn the cable off the box due to the poor connection that will follow. Best way to do this would be to drill a hole in the box and sand the paint off around this area, then put a bolt through and use a crimped connection to terminate the connection with the cable and tighten this onto the box with a nut. Doing this should not compromise the capability of the box, if not improve it.
Secondly if this box survives an EMP of this magnitude, I can guarantee that the mobile phone towers in your area would be toast also, making your phone that is safe in the box useless as well. Walkie talkies (or any radios) are a good idea though and a GPS to a much lesser degree.
Keep up the good work!
So some guy in the comment section mentioned that what she's doing with the ground wire is actually just worsening the effect of EMP because the wire is sticking out inside the box and acting as an antenna, and further recommended to just scrape off the paint of a little section on the outside surface of the box and solder the wire directly to the exposed metal there.
My question is whether your recommendation is also acting like an antenna (because you suggested to drill a hole and plug the wire with a bolt) thus worsening the effect of EMP, or are there some misunderstanding in that "just solder the wire" suggestion?
Thank you in advance.
keith moore it is quite evident that you have no idea what you are talking about. GPS satellites orbit 20,000km above the earth (that would require a bigger surface emp event than has ever occurred and is about two thirds the circumference of the earth). I can almost guarantee that the system will not totally be taken down. Even if there was a nuclear event in orbit, the gps signal may be patchy but by no means useless as the satellite obits are not stationary.
Y H No not at all, grounding the equipment will dissipate any unwanted RF frequency far quicker than the box itself doing all the work. I can understand the idea that this could act as an antenna in these situations, however there is a massive chunck of metal under our feet called the earth. It really wants to suck in noise and voltage if you give it to it. I cannot stress this enough.
The previous site I worked at had many large VFD's located quite close to sensitive instruments, the solution was to make the switchroom into a massive Faraday cage and earth the crap out of it. The reason for this is due to the switching rates that VFD's throw out which in turn induce noise into instrument cables.
Soldering a connection would be ok, but if you have ever tried to solder a small copper cable to a plate of steel, you would understand how difficult it is. Secondly soldering is not always ideal if the join takes current, as it will heat beyond melting point and create a hot join (extremely rare cases but can be eliminated by bolted joins).
Hope this helps.
keith moore While an orbital strike is certainly possible, I have trouble seeing how it could be useful to anyone. Nuclear strikes on ground targets makes alot more sense, and I can tell you that with well over 60 nuclear surface detonations since 1990 there is no logical problem here.
For example, the only event that has the ability to cause a half planet wide outage would be from a massive solar flare (if that happens the emp would be the least of our problems). Nuclear detonations are surprisingly small with regard to emp effects in atmosphere. Anything bigger would render a Faraday cage useless anyway.
Can you dispense with drilling the hole altogether and simply use a jumper cable to a sanded-down part of the closing clamp?
If you are using a ammo cans as a Faraday cage, check the bottom of the can. Many modern can bottoms are not completely welded. If yours is spot welded or not completely welded, use aircraft brand paint stripper to remove the paint on the outside of the bottom. Clean it well after the paint is stripped. Then place solder flux into the weld gaps and then solder all along the bottom. Repaint the bottom. There needs to be no gaps at all.
Also use solid core wire for the ground. This wire is easily obtainable from major building supply stores. It is standardly available as in wall house wiring. Many supply stores allow you to buy it by the foot. The flexible wire Lilly is using is braided. Braided wire cannot handle large discharges without burning out.
We Love you Lilly! Keep up the great work! Much respect.
I sometimes joke with people by saying "you're on my team in the apocalypse..." But with Survival Lilly, I would hope she would let me be on her team! Love your channel, thank you for sharing all your knowledge of survival!
Rather than saying that to others maybe try and make yourself worth wanting on a team. Relying on others when things get bad isn’t a very good plan
Been following you for several years, Lilly, and really enjoy your channel. Now you are getting into something I am familiar with. I have been an Amateur Radio (Ham) for over 50 years. When I started in it, a lot was using vacuum tubes. EMP will fry solid state devices with transistors and intergrated circuits (IC's). One should get an Amateur radio license in your country and find older vacuum tube equipment that works. It should be much safer from a regular EMP situation. The only problem will be how to power it. It would take too much current to run from solar cells unless you have lots and lots of them and batteries. The generator stored in it's own Faraday cage would solve that problem. And like the one commenter mentioned, re-cycle out the stored gasoline.
Just a question. do you need to replace the gas monthly if you use non ethanol gas with sea-foam added to the fuel? I am pretty sure the fuel would stay fresh for many months as this is how I winterize my small engines & they all start easily in the spring.
Hammers come in several sizes like "please" "oh yes you will" and "I WASN'T ASKING"
At work when anyone was having a difficulty of any sort we would always say " You need a bigger hammer." - LOL
Or we would say put some hair around it!
When in doubt hit it with a *BACKHOE.*
At the end you`ve forgot the "Persuader", my BIG favorite.
Since I've been watching your videos of how to survive among other things, I've learned a lot from you and I want to thank you. You are my new hero I am looking up too. I can now use some of your skills next time I go camping, fishing and a few other things. I'm going to surprise my Step Dad of the things you taught me. My step Dad served in the Air Force and he as well know a lot of things. Again thank you survival Lilly and May God Bless You.
Hi Lilly, just thought I would mention that the lid on those ammo cans will pop off easily when you open them up, just push the lid to the side and they come right off the hinge pins. Just to make it easier on your next one, instead of having the awkward box attached , I really enjoy your videos! keep them coming.
Yes, I was about to mention that the lid comes off to make that awkward dremel of the hinge end of the box much easier. You beat me to it.
Wow Lilly, you did an excellent job explaining that.
There are small Faraday cages available to consumers to protect credit cards and computers from digital theft. Those are great for low wattage radio signals. They don't need to be grounded because of the low energy involved.
However, in the case of an EMP, the wattage can be so high, it can actually burn or melt electronic components from the inside because the electricity literally bounces around inside the circuitry randomly and colliding with itself. Grounding your Faraday cage from an EMP redirects the energy into the earth and away from your devices.
Normally, I discourage people from using aluminum foil for a Faraday cage. Why? Think about foil in the microwave. It's wrinkles, folds and creases cause the electrons to bounce back on themselves and then colliding back into each other creating short circuits back onto itself. It has the potential to catch more EMP than it will protect from. BUT when you ground foil properly? Electricity always follows the path of least resistance and goes into the Earth and away from your devices. Properly grounded foil can protect much better than foil alone.
Thanks for this video Lilly!
My opinion - ground it using the electric socket and use a safe as a big metal box. Buy an electric plug from DIY and connect only the ground pin so it relatively safe
What about a Solar panel just in case in power is down and battery pack runs out the sun will charge everything you need
Caleb Samuel I have 4 of them just for that event...im afraid an EMP will damage the panels tho-Wut should I do to protect them? They are larger than an ammo can 😞...any thoughts?? I also just purchased a windmill generator..and im not sure about that either. Im contemplating simply sealing them up then burying them..or perhaps wrap them in chicken wire..
I meant like the smaller Solar panels I live in the USA didn’t know if y’all have them or not I’m just know learning about all this so I’m no expert it was like a question seeing what people would say . Thanks for answering
Conducting foil blanket over them as they are stored not connected to long distance power lines.
Caleb Samuel I'm not sure if the EMP can damage the panels
The federal government has tested all kinds of things like this solar charge controllers actually tend to do fairly well during an EMP so do batteries nothing and out of 29 automobiles that were tested only one had a catastrophic failure other ones had what they called inconvenient issues like the relay for the windshield wipers burnt out but the car would still run start and drive but solar panels on the other hand they did not survive they would have to be in a faraday cage completely unhooked until after the event
You’re going to have galvanic corrosion where you have dissimilar metals in contact. That aluminum foil gasket will turn to powdery aluminum oxide.
What would you recommend?
@@magnesiumsniffer3370 Use conductive silicone rubber, it is a rubber with both water sealing properties and electromagnetic conductivity.
@@Cypher-Six appreciate it
@@Cypher-Six that’s pretty cool
Not true in the slightest
Lilly, you are very well informed about what many people don't even know about. Kudos to you for leading the way. What you say is very true, an EMP is very dangerous and has already taken out satellites and power grid equipment on various other occasions and will do so again. I applaud you for raising this subject. Your ammo can design has a few people picking at it as faulty, but it will be very good in practice. Inside the 'Faraday cage there is no field strength at all. it does not need to be lined inside with insulation, nor does it need a ground, but there is no harm in doing either, you are welcome to do what you think is right. We'll check up with you after the next 'event'.
Love using ammo cans for pretty much whatever I can they make great ovens I even used one as a grill once great stuff lilly
Who knew? :)
Ovens and a Grille? I wouldn't trust that Army lead paint, nor ingest any foodstuffs coming from that inedible death in a box. If you sandblasted the interior and exterior, then have'adder.
Otherwise, R.I.P.
Nice vid with lots of tips and would mean a lot for a lot of people, thanks.
Another tip I would like to add is for you to drill a hole through your outside wall and connect a wire onto a copper pipe knocked into the ground, bringing the wire into your house for a proper earth and connecting that on a metal plate, preferably copper.
By cleaning the paint off the bottom of your farraday cage to ensure contact, place it on the plate and thus giving you access to it all the time and grounding your cage.
I find Lilly’s knowledge in so many areas fascinating. 6:47
Great video. Neat idea. A small solar charger would also be a good asset to have in the cage as well, just in case the entire grid is down.
Lilly, One way to check if your seal is perfect is to put your cell phone in the box and then have someone call your phone. If it rings, then you don't have a good contact. Another way is to put a portable radio in there.Turn it to a station and if you close it and can still hear a station then you have a problem.
Hallo Lilly
aus Ermangelung an Englischkenntnisse in deutsch ;)
Tipp:
Verwende eine lange Schraube die du mit Unterlegscheiben fest mit einer Metallkiste verschraubst...
Verwende zwei weitere Unterlegscheiben und eine Flügelmutter in der du dein Kabel einklemmst und per Hand fest anziehen kannst...
Also:
Schraubenkopf - Unterlegscheibe - Metallbehälter - Unterlegscheibe - Mutter - Unterlegscheibe - Kabel - Unterlegscheibe - Flügelmutter
die Flächen des Metallbehälters, die die Unterlegscheiben berühren sollten blank geschliffen werden...
Das Kabel würde ich unter ich unter die Rohr schellen klemmen...
Dazu einfach die Rohrschelle lockern die Kontaktfläche mit Sandpapier etwas reinigen...
Diese Fläche kann mit etwas Fett (Vaseline besser Kontaktfett) einstreichen...
So wie du es gemacht hast geht natürlich auch...
Wollte nur mal etwas Klugsch.... ;)
lg
André
Thank you for your training! Under YOUR training, I built one of these today by following your instructions. I even have it now grounded to my 10 foot grounding rod. Thank you!!
So inventive. I love survival and science. Great to see how they can combine
Instead of lining my ammo box, I put each item in a cardboard box. Decreases capacity of the can, but it worked better for me. Looks good!
you are the best youtuber and got me into the outdoors can you do more fishing?!!!!!!!!! THANK YOU I'm only ten and I have been with your channel since I was 7 please respond i love your chanel!!!
Do you like turtles?
Right on Lilly, not that I care about electronics, they will be useless but I am glad you are not blind to what's happening in the world!
I've used braided copper grounding strap along the seal, where you used foil.
How about steel wool? It has flex so it won’t jam or get stuck and will adapt to the shape of any gaps.
Every man needs a Lilly.
I learn so much from Survival Lilly and she’s easy on the eyes
I agree! She is one of a kind.
One would want to download local maps into their cell phone. Reason is if the cell towers are down...the GPS satellites could still work (probably). So if you have your maps on your cell phone, then mapping and destinations and walking routes would still be vital information that would work. You wouldn't have to rely on the lucky chance cell towers were working, let alone servers with mapping data, to download mapping information.
Another layer of protection could be to wrap each device you put inside in aluminum foil as well. You might consider placing them in ziplock baggies, or vacuum sealing them to prevent possible moisture damage with changing temperature/humidity levels now that the ammo can is no longer water tight.
Also, if you have it or can get it, Aluminum tape. It is similar to duct tape but has an aluminum back. Tape over any parts that may have a gap or all the way around your lid. The tape blocks the waves from getting through any gaps.
Great to see you broadening the scope of your channel my dear keep up the great work.
If she knew stuff to make videos about . Poor EU girl trying to make a kroner
How great to see Canadian Prepper commenting on this video. I am a sub and loyal follower of your channel. So good to see great minds coming together.
get a room!
This is some seriously advanced preparedness. Nice work Lilly!
Hi Lilly. I always love your videos! My favorite part of this one was when you beat the crap out of the ammo can with the sledgehammer.
Another type of therapy, just pleasure to watch, as another people working! I enjoy your video!
This is a very useful idea! I've got the amo-can and was planned to make the compact wood stove but I change my mind. I should make the Faraday Cage first instead of stove.
I'd make the stove. You need to eat and be warm before using a walkie talky... unless your stranded remotely and need immediate help.
Lilly, great video. Since I'm kind of a prankster I would have said "now let's test it". Then I would have shown me walking into afield, set up the ammo box, camera view from a distance and showed. A nuclear exploration. Then said unfortunately placing my ammo can so close to the EMP source, I didn't calculate for high heat intensity.
Why did the Walrus go to the Tupperware party? To find a tight seal.
John Berry 😐
John Berry 😂😂😂😂good one
Mucking Fagic!
when is iris potato, not? when it is a french fry. :) what is this the comedy survival lily pad?
Lily, who is the manufacturer of the walkie-talkie with a radio? Thank you in advance.
Don't forget to put a supply of batteries in your cage. An EMP will drain batteries in an instant.
If you continue with such subjects as this, you will receive another video award!
I have heard of the rays coming from the Sun and affecting equipment in buildings and my home have a ground outside connected to a grounding rod. I never thought of making a Faraway Cage though, but probably should. The one you built looks nice and thanks for sharing this information.
I got ammo cans years ago for $3 each. So I used a couple to build Faraday boxes. I wrapped 3 modern HT's and a portable shortwave receiver in aluminum foil and stuck them in the boxes. Then I put the boxes in the basement, just in case. But mostly I rely on having old a couple of tube-based transceivers to deal with possible EMP.
I think if there’s an EMP or CME powerful enough to permanently knock out a mobile phone and it’s charger, the phone masts will be wiped out which will render a protected phone useless anyway.
An old microwave oven is an ideal container, it’s shielded on all sides and has a ground connection. Just disconnect the positive and negative wires from the plug or remove the Electric’s inside leaving the earth cable.
many microwaves do not even protect from phone signal waves from getting through. many tests have been done on this subject. (which also means the micro waves are getting out as well.) try it yourself, put your phone in the microwave, then call it from another phone. if it rings, its not protected. In any case, phone waves are much lower than any EMP would be. thus still frying the phone.
@@kayci2058 Been testing household appliances and kitchen utensils. with two mobile phones. My microwave oven fails as Faraday cage. The statement by "Edward Snowden" about using microwave ovens as a fafaday cage isn't 100% correct then. I did try a baking tray for biscuits with a stainless steel mixing bowl on top. Then put a mobile phone inside. This happened to work well as emergency faraday cage use.
Lilly ! I have a challenge for you . How about building an overhead cover and reflector to protect your fire during rain storms ? ( upgrade for your survival shelter )
Thank you for this video. I have enjoyed every one of your videos that I've seen so far. I am subscribed because you give real life experiential knowledge. Also, I find your confidence inspiring. Please keep doing this. It is appreciated. God bless you and your work. Peace Everyone.
Ever consider bonding the lid to the case with wire? You'd need:
- 2 small bolts with nuts & washers. Drill one hole in lid, one in case... both very close to the hinge.
- Get a short, heavy gage wire with an eye-ring on each end
- Bolt the jumper wire from lid/case.
Because of the overlapping flap on the sides of the lid I think you'd still have an extremely effective full coverage cage. And you'd still have the gasket to help keep your stuff dry
Another awesome video Lilly! I always love watching your videos because it's actually informative and i learn something very useful from it. Thanks for the awesome video!
Lilly is the best of both worlds, smart and super pretty!
I put a knife, matches, and a candy bar in my faraday cage so I know they will work if we get hit by an EMP!
00Coyote
I heard a rumour that you could store your ammo in an ammo can, but I haven't verified the rumour yet.
Dear God! Save the candy bars no matter what!!!
FOOL!... You're candy bar will melt after your matches ignite when the EMP causes immense heating from your bad ground. Now all you are left with is a pile of burnt ant bait and a sticky knife!
🤣😂🤣😂🤣
Lol
I haven't gone threw all the responses sooooo...
I see a few flaws.
1) if a EMO happens your still sol. The power grid will be down for a huge area. Chargers won't work to charge you devices. The cellular system will be gone. So no phone will work but yours. No oned to call as there phones have no service. Your power cell takes a long time to charge. Again radio wil be dead. Your car will be dead.
EMP's are nasty, and wide spread. Not trying to put you or your video down.
A lightning rod possibly not be heavy enough. The tin foil i doubt will survive the amount of current going threw it. Just like the wire you used for your ground.
All good info Lilly. Love your channel. So much great info on it.
Jerry
Wish I knew how to know if a response is left to this.
Love that you are becoming more of a prepper. You have inspired me to build a bug out camp. I am a prepper so this will be great. Would love to build a little off grid cabin in remote northern wilderness close to my home in Canada.
Most EMP protection containers are like body armor. They will only protect you to a certain level. An EMP burst comes at varying magnitude and frequency and it could be very high frequency. Because containers need to be opened and closed, they are not always fully sealed to RF. This is not a huge concern. Yes, the grounding connection should always be attached to the outer shell. The steel ammo can makes a nice EMP container.. Just a thought. Thanks for your video.
Rather than cardboard (which could absorb water if there is ever a leak or if the can is opened in the rain, etc.) use reflectix-type material - (essentially bubble-wrap with a foil coating on both sides). It is cheap (building supply store), water-proof, and potentially adds extra shielding as well as cushioning.
It also makes a good addition to a sleeping pad, and I used it to make for a cozy for my camping cook pot, for making sun shades, etc., so you'll find lots of uses for the extra you have from buying a roll, or maybe you can find enough scraps from a builder or contractor somewhere.
I think the foil on that stuff is aluminum - so it could possibly carry some charge to the interior.
How about foam core? It does have paper on the surface, but the guts are foam, so it will cushion your goodies like carboard, but would be less absorbent
Recomendation: I keep the weather proof seal on all my ammo cans to keep water and rain out. What I do is wrap all individual components with 3 layers of aluminum foil, after I seperate the batties from the device. Then I make the outside of the foil with a lable of what was wraped within and the date. The individual components are protected. Please note that the batties or power source must be seperated from the components when you wrap them.
If it is possible have every device 2 or 3 times. Take oiut only one after and EMP and protect the others for multible EMP attacks.
A old way of making a good R.F. proof box is to put "finger stock" around the edge. Dont know if it is even make anymore, Test the box by putting a cell phone in the box and call it with another phone and see if it rings. It should not.
Digi Key still offers it: www.digikey.com/products/en/rf-if-and-rfid/rfi-and-emi-contacts-fingerstock-and-gaskets/945?k=finger%20stock
Thank you for this excellent video.
A few minor points:
I would not connect the Faraday cage/box to your home ground. This would act counter to the purpose of having a Faraday cage. Keep the Faraday cage in your garden shed. Connect it only to the grounding rod you drive into the Earth.
Do not attach this ground line, or any ground line, or any other conductor to the conductor that connects to your lightning rod.
Given a lid and box made of some (doubtless) ferrous metal, the connection of the lid and box to the gasket made of aluminum will almost certainly corrode. Adding the copper wire in contact with the aluminum and the ferrous-metal box will also create a point of corrosion. Braze the flat heads of some steel bolts to the outside of the lid and the outside of the box. Use electrical connectors attached to the bolts to enable an electrical connection between the outside of the box and the outside of the lid. Put another connector on one of the bolts. Use that connector to attach a substantial ground wire (6-gauge) to a five-foot rod driven into undisturbed earth, which will then act as your ground. I would do this all in a shed, not in my house.
Do not attach this ground line, or any ground line, or any other conductor to the conductor that connects to your lightning-rod.
The conductor attached to the lightning rod is not a ground.
The conductor attached to the lightning rod should not be connected to a ground/the Earth.
The purpose of the lightning-rod system is not to provide nor to serve as a ground, nor as a connection to a ground/the Earth.
The lightning-rod system's purpose is to gather all of the static-electric charge that develops on your house and dissipate it through the lightning rod(s). With its static charge thus dissipated through the lightning rod(s), your house presents a (literally) less-attractive target for lightning.
If an emp hits. The cell towers won't work either. So cell phones won't work with no towers. ?
yotagerlie You don't have information like videos, audiobooks, music, photos, etc.. stored on your phone?
yotagerlie that’s why she has the radios beautiful lady !
Yes, but once they got fixed, your phone is back to business
Once they get fixed... There is the crux of the problem. Very little of commercial spares are packaged to protect against EMP. As such, it could be 10 years before cell service is restored.
Sat phones perhaps
Great video ! Thank you for the heads up and knowledge !
One potential problem I see is condensation. If this box is taken to say a bug out location. In a cold climate. There is a good chance the inside of the box will condensate. And the cardboard will get wet . Which creates many more problems.
IMHO. If neoprean foam was glued to all sides and lid and bottom. It would provide R value insulation which will help batteries . And it will eliminate condensation.
The condensation problem with sealed metal containers is very real. Especially ammo cans as I have had Many things get ruined in ammo cans from condensation over the decades.
Good morning!! Here at work with a cup of coffee in my office, watching your vid. Awesome content ,never gave a emp a thought but will consider!!! Thanxs!!! :-)
Great video. Very informative. Give you tons of credit for doing your research on the Faraday cage.
Dust cleaning device 😂😂😂
DCD
I’ve been trying to comment. You are my heart for survival.
need to make one in which i can sleep in before the 5 g technology is coming alive ..haha
Lilliy and all, I plan to split my comment into two parts. Two different subjects that may garner further comment: For starters, the question is, "to ground or not to ground?" If you choose to add a ground, please understand that the wire you add to the metal container is itself an antenna. This is also true for the power cord on an appliance, TV, computer etc, etc. The entire grid is a giant antenna. (google the great solar storm of 1859.) If you choose to add a ground, sand off some paint, drill a small hole and use a well-cleaned steel or brass bolt and nut for the attachment point of the ground wire. That way you have a good mechanical bond. Even better, use some flux core electronic solder and solder over the nut and bolt connection, allowing the solder to flow into the joint by capillary action. This will give you the very best low resistance connection. Also, it would be good to drive a separate ground rod well away from other grounding rods. Drive it deep into moist soil. You WILL NOT obtain a good ground in dry soil. Adding salt around the ground rod will temporally attract moisture but is only a short-term fix at best. A ground rod driven deep into the moist soil is your best plan. Also, a scrap copper plate with a good mechanical and soldered attachment buried deep where the soil is moist will work well as a ground. A final thought, nest your equipment. Our more important items have multiple layers of protection. For example paper wrap and foil around a tablet or cellphone. Another insulating wrap and the unit is placed into a tin or small metal box and sealed with metal tape. The doubly protected unit then goes into the larger metal box with its own insulating layer. Far more protection than a single cage will provide.
I really love your videos, you're amazing and absolutely good in everything you do👍👍👍👍👍👍👍👍👍
Part two :
Lilly and all, The cell phone may not work if the power grid and or the cell network become damaged. Still, a cellphone or inexpensive tablet will have many other uses. Well trained and prepared individuals will have survival knowledge. What about those who are new to preparedness? I suggest loading first aid books, survival books, military manuals and any general how-to books covering your weak areas of knowledge onto flash drive // memory sticks. They hold a lot of information and take up little space. Pack them in a nested fashion (see my first comment above) inside your EMP can. Include an inexpensive USB cable adapter to connect to your cell phone or tablet to the memory stick. You now have a complete survival library to reference and a "reader" to do so. Not as good as knowing what to do by instinct and practice but still a great and inexpensive part of preparation. I would also suggest adding a compact folding solar panel in the EMP can, it will charge your small devices in a grid down situation.
Yes!!!! Great Idea 😎
I am also an Electronics Communications Engineer and I agree with the ground wire suggestion. Small holes do matter however. A an example brass screens are incredibly leaky. 1:46
search the internet for arthur bradley and his great videos on emp. you need an emp gasket on that ammo can to work properly
Arthur's videos are top notch and well worth the time to watch. He's the only person I've ever seen that uses the scientific method to test what he's explaining. Good stuff.
So if I build a cage to protect the computer system in my vehicles will I also need to cover the wiring and fuse panels as well?
Your car is a good faraday cage - it will withstand millions of volts and survive to tell the tale - ATB
WRONG!
th-cam.com/video/u7IPKQVFjCQ/w-d-xo.html
It is right, if talking about an older type of car, with an all metal body. Those you are perfectly safe sitting in the middle of a thunderstorm. I have done that quite happily a number of times.
Don't try that with a modern car though, as many use different materials in the body panels, so the Faraday Cage property does not work.
Note that none of this is claiming that a car would be any use for an anti-EMP Faraday Cage. Stuff in the boot may be OK? I would defer that point though to the better qualified folks already speaking up in other comments.
Get a really really old car though, which is not reliant on computers or electronics, and the car itself will be EMP proof. That or some purpose built kit car, without such components. For those who are planning on bugging out by car.
Petrol pumps won't work mind.
Your video was about the car getting hit with electric arcs, while IN a Faraday cage, not that it is a Faraday cage itself., Not quite the same. If your cell phone works from inside the car, then you are vulnerable to EMP. It is a matter of Wavelength of a freq and the power levels. Most of the enery of an EMP is at Cell Freqs or lower. While lighting can still fry you in a car, it normally follows the metal body around to ground. That is the deal with not stepping out of a car with power lines on it. Rubber tires insulate then when you step out you make the path for current flow.
Tom Popp, there was no Faraday cage visible in the clip. The vehicle was inside a building, in which the electric arcs were being generated. That was not a very good video though as the pertinent bit was only a second. Here is a better one:
th-cam.com/video/ve6XGKZxYxA/w-d-xo.html&ab_channel=BBCStudios
Nice video but some important notes: Electro-Magnetic Pulses (EMPs) are not just electrical, they are magnetic too. The EMP pulse is generally (but not exactly) a half sine wave with an electric field and a magnetic field that is perpendicular to it. What does that mean for non electrical engineers? Simple, it is not just an electrical wave pulse, it is magnetic wave pulse too. The Ammo Boxes are a good start for making a Faraday Cage (which is what you are making to block and shield EMPs). The reason is because the Ammo Boxes are made of ferrous metal like steel. Mu Metal would be better but not practical. Aluminum may block/shield most electrical waves and currents but magnetic waves can still get through. Try holding a steel washer to the other side of Aluminum foil folded a few times and a strong magnet on the other, the washer will be strongly attracted through the foil to the magnet. Now try it with steel, like the side of the Ammo Box, the washer will have much less attraction, if at all. Of course this is DC and EMPs are high frequency AC with many characteristics, but it demonstrates the point. Don't use aluminum as a gasket in your Ammo Box Faraday Cage, it will leak some of the extremely strong EMP through. Nuclear EMPs are thousands of times stronger than EMPs we get from the Sun on Earth. It is better to find some fine mesh steel braid and use that for the gasket. The best are for RFI/EMI/TEMPEST applications. Also, when a nuclear EMP occurs, eddy currents will be introduced in the steel, so you need at least 1 inch (25mm) of cardboard all around the interior of your Faraday Cage to protect your devices from the eddy currents. Also, a thin layer of ESD foam is a recommended. Look for "Ammo Box Faraday Cage" for details. I tested my Ammo Box Faraday Cages to have an 80dB attention at 100MHz 1W wave at 10 meters away. With aluminum foil as a gasket, that drops to only a 70dB drop which means 10 times the energy gets through with an aluminum seal. Actual EMPs have some higher frequency components but this is my baseline based on the equipment I have. The rest can be extrapolated from actualy EMP data, but that is mostly classified.
It's not a good idea to hit your Ammo Box with hammers, it is best to keep the box edges as true as possible and have a good fine mesh steel gasket that makes perfect contact between the "sanded" case and lid all the way around.
Finally, the Faraday Box (now that the rubber gasket was removed) may not be air tight, moisture can work its way over time. Remove all batteries and store them separately from your devices. Put some desiccant packs inside to absorb moisture, then seal the whole box in a vacuum bag or similar air tight wrapping. The idea is for long term storage of your electronics and NOT open it until the EMP events are stopped - usually within the first day of a full commit nuclear war.
But not a bad video, it will work, but why risk it when it can be better.
Thank. You Lilly!!!!
You are awesomeness in a TH-cam!!!! Lol.
Btw you are super beautiful!!!
Lilly test the container seal by putting a light inside it. The light will shine showing where seals, corners of can or lid is not EMP proof.
Why are you suddenly interested on these topics? Are you expecting for a EMP (maybe) from the sun or artificially produced? It is quite different from your traditional videos :O
She's never done anything like this, yes. I think it might be about being prepared for as many scenarios as possible and a solar flare is certainly not out of the question. Probably more likely than the fall of society.
She has always been interested in disaster preparedness. Hence, the 'Bug Out Shelter'. This is merely another facet of that. She does use quite a bit of electronics in her activities so this is prudent, IMO.
Her description says she does modern day survival also
She did a video with Patriot Nurse, which is pretty much all "What do we do during the Apocalypse?" stuff. Also, whenever she uses the term "bugout" (bugout bag, bugout vehicle, bugout shelter), in this context it refers to getting out of the city when something terrible has happened.
😮💕HELLO ! This is survival she's right on topic
You can use aluminum tape around the can to seal it, and you can make a grounding rode from a 4' 3/8" rebar. Make a small repairable hole in your home and run the wire through it to the outside. This kind of grounding system can also be used to protect short wave radio's from lighting strikes.
You actually think your electronics will work after a nuke explosion or emp? You're better off making a bird cage. What wifi or cell phone towers are you going to use these electronics on? Cause that emp is going to fry everything that makes those said electronics work. Faraday boxes are better used for spying eyes or goverment paranoia.
I searched for the information so I can build a cage for something bigger.
Still, I think even a small can like this would be great for an inverter or maybe a couple of small wet cell 12 volt batteries.
But I agree with you about trying to protect a phone or tablet. If the internet is down along with the entire power grid, then having a phone isn't a priority.
Can anyone tell me the best cheapest materials to protect an entire room? Like actually protect it? I am installing them in old folks homes. Please help
Another good thing to add would be a flash drive with important documents possibly encrypt the drive for safety. Maybe even a solar charger to charge your battery bank as well.
Awesome video sister. You're the right trail with modifying original seal. Conductive silicone (metallics added in) fabrics and cords may increase effectiveness of seal and ease of build. Probably can leave original seal in and build around it. No hammering required. Thank you!
I'm also an engineer watching this. Older microwave ovens made in the '80's make decent Faraday "Boxes". Cut the power cord as close to the chassis as possible, and cover w/ metal tape. Line the inside with thick foil to augment EMR shielding. The seal around the door is the weakest point. Seal with metal tape. You can test your Faraday box's range of RF shielding by using a small AM radio (longer waves), and a cellphone (microwaves).
Here is a cheap alternative for a stationary Faraday cage: A Microwave.
I've tried that and it didn't work. I put my pocket phone in the zapper oven and dialed the number. It rang just like it was outside.
Also a good idea to have a faraday cage in your bug out vehicle with spare electrical components that may get your vehicle going again following an EMP situation.
Great video and great comments btl. You have a really have a great community here Lilly, well done and thanks.
Update: A metal trash can works very well.
You have to use foil tape around where the can lid edge fits with the lid on tight. And around the handles and seams.
You might want to use a plastic trash can inside the metal can to insulate the can from what you are trying to protect.
Or you can line the inside with cardboard.
Not necessary to insulate the inside top of the can lid.
When testing any Faraday cage, use a portable radio in it.
Tune to a strong AM frequency/station, put it in, close the lid.
Do this again but set the channel to FM.
Do this again but with a cell phone.
If you only hear static or nothing, your cage is pretty decent.
NO Faraday cage will protect from everything.
Things to put in a cage:
Solar generator, portable radios (batteries removed).
LED flashlights. Regular old style flashlights do not need a Faraday cage - just remove any batteries.
Spare cell phone and charger.
Static inverters.
Calculator.
18650 or similar rechargeable batteries that are internally protected. Those have electronics built into them.
The battery charger of course.
ALWAYS use a digital multimeter and check for continuity between the lid and the can! ZERO is what you are looking for. Check for ground too.
You can also place other electronics in the can.
Just remember, rechargeable batteries usually need to be recharged about every 3 months.
Additionally, you can place a few very dry towels in there to help control moisture.
About her ammo can problem - roll up some aluminum foil and place around the edge before closing.
Another suggestion is the simply wrap the outer lip of the ammo can lid with foil tape.
Remember, TEST IT every time you open and close it.
IF you want to ground your trash can Faraday cage, simply place it on the concrete floor in the basement. Not perfect, but it will ground it.
A thick wire to use if you want to ground yours is plain old automotive jumper cables.
If you are severely paranoid, wrap individual things with layers of aluminum foil.
Note: Harbor Freight ammo cans DO NOT WORK out of the box.
Good idea. I understand that a galvanized steel garbage barrel with a tight-fitting lid can be used as well. I would want to run a wire from it to a grounding stake pounded into the earth, and insulate the electronics inside from touching the sides or bottom of the barrel. With a solar CME, we'd have a couple of days' warning before the EMP hit. With a nuclear detonation, only minutes, if any. Hope neither one ever happens. Nice demo. Cheers.
I would suggest that you put a solar-powered battery charger in the box, if it does not fit with other items, you can make a Faraday Cage just for it. A solar-powered battery charger would be good if plug-ins would be ruined by EMP as well as source of electricity. :)
항상 즐겨보고있습니다~
영어는 잘못해도 릴리님의 영상업로드 늘 기다립니다
good luck^^
A USA government expert on EMPs wrote a book on this subject. He stated we can use a galvanized garbage container as a Faraday Cage.
Lilly, you are a smart lady! Thank you for the info that you provide to everybody.
Use thick copper foil to line the box. Also wrap each item in a foil wallet. Best protection is to also where possible disable any antennas connected to the devices and also disconnect batteries for long term storage.
Who's here in 2023? haha you can now purchase grounding cables that plug right into the ground (third) prong of any outlet. Just get a small reader to make sure that outlet is actually grounded. Even if your house has a grounding rod, every circuit box may not be attached to it. I already had one of these cables in my house from an old grounding mat I used to use (silver impregnated fiber mat). Thanks for the video!!
Very impressed, Lily! Good work. 👍🏼👍🏼
Ammo cans are great. I lined mine with wood keep shortwave radios walkie-talkies. Batteries bought a couple of large ammo can that can hold small solar generator. I left the weather seal in didn’t paint it
A very interesting and worthwhile video.
Not many realize that PVC conducts electricity way more than almost all metals. I learned this while studying electronics, it rates a 10 out 10 while copper and other metals are less conductive, I was shocked (no pun intended) when I learned this fact.
After sanding all paint replace the seal with stranded copper wire, gets even more contact from the lid to the box and you wont have to worry about small gaps in the lid. Remember that a faraday cage without any wire penetrations does not need to be grounded, and any attempt to ground such an uncomplicated faraday cage is simply asking for problems. ... This may work as a static drain or to protect against electric shock; but for an EMP ground it is worse than worthless, it is an antenna.
Lilly if you slide that lid to one side the lid pins will disengage, and lid will come off to make it easier to work on.
"if the electrician did good work" Love it.
Looks like a doable project, with minimal tools.
I suggest adding one of those compact solar chargers to that kit and having chargers that to can connect via USB to it.
I could be wrong, but some of those devices you put in there had standard plugs. I suggest committing to devices that can either plug directly into the solar charger, or batteries you can put in a charger connected to the solar device.
Now for a serious question:
Why not leave the gasket to maintain a water seal, and just sand/grind the sides of the rim and lid to make that contact?
I plan to try this project.
i totally know what you meant, but "ask your parents" made me laugh. just the image of me, a thirty year old woman, calling my mom and asking her if she could come help me ground the wire of my homemade faraday cage....hilarious XD
@Survival Lilly >>> FWIW, I never expected to see "FARADAY Cage" as a subject to one of your videos.
Good on 'ya, My Dear!
*EDIT:* This is just a GUESS - I do NOT know about much about electronics, nor have I really researched this. BUT...electrically conductive gasket material is available commercially. If you wanted to spend the money you could use that to seal the lid on your ammo can versus using aluminum foil.