You are going to facepalm when you read this, but just get a few sheets of aluminum foil spread over the box opening, and you pinch it down with the UNMODIFIED lid. You don't have to modify the lid by removing the rubber gasket, sanding, or buy conductive gaskets, etc. Just remove the paint on the lip of the can so it will touch the foil to make a connection. I use Reynolds Wrap, "Super Duty" and 2-3 sheets for thickness and redundancy.
@andrewmccarthy41444 ай бұрын
If you don't remove the paint on the lid, how do you get metal to metal contact? Can you show us your tests?
@MI_Prepper3 ай бұрын
@andrewmccarthy4144 The foil over the opening is your metal to metal contact. You strip the paint off of the lip of the opening, then use high conductive paint on the lip of the opening where the foil will touch if you are too worried.
@scottprincipe67785 жыл бұрын
I really like how you give a honest answer and help to all the people in the comments that may not have the money to buy your products yet you still have time to help them with honest answers you are a good man and patriot thank you and God bless
@disasterprepper5 жыл бұрын
Thanks Scott. I really appreciate the kind words.
@billedwards41243 жыл бұрын
@@disasterprepper berry good
@TheCjvega35712 жыл бұрын
@@disasterprepper seriously I appreciate your videos too and can't afford much either. I'll give likes and subscriptions to help your channel!
@fredharris37272 жыл бұрын
@@disasterprepper in your opinion would metal tape work instead of the gasket
@Solved-with-an-Axe6 жыл бұрын
love the proof, not just word of mouth. and..love you novels
@disasterprepper6 жыл бұрын
Thank you!
@gwenclark27376 жыл бұрын
Thank you so very much for your help. I am a single woman and your instructions are simple enough and economical for those like myself. God bless.
@disasterprepper6 жыл бұрын
You are most welcome.
@levistrauss1436 жыл бұрын
I really appreciate your informative videos. Thanks
@disasterprepper6 жыл бұрын
Glad that they are helpful.
@usptact3 жыл бұрын
I realized this is quality content and the man is serious when I saw him well dressed.
@canamshooter91046 ай бұрын
Lacking a ZZ Top beard and being literate is a nice addition to a EE PhD!
@ggggg4030 Жыл бұрын
I made two huge cages for $30 each: 2 55-gallon steel drums, $15 each; 1/2” round foam, 15’ for $5; 2” conductive tape30’ for $15. I used the foam and tape to make the conductive gasket. Perfectly blocks 4G with a bit of weight on the lid or using the lid locking ring. 3 milk crates fit with some room on the side. I store all my mission critical electronics in them: radios, flashlights & lanterns, batteries & chargers, solar power system components, PV/monitor, spare parts, hand power tools.
@j.z8006 жыл бұрын
I love your channel! Thank you so much for putting this information out there! 💯👍
@disasterprepper6 жыл бұрын
You are most welcome.
@andrewbartczak59412 жыл бұрын
I love the latch mechanism on your door.
@disasterprepper Жыл бұрын
Shield rooms often have these heavy-duty knife edge doors. Hard to open when closed!
@nedporkus8602 Жыл бұрын
Another option might be to keep the rubber gasket to retain the water tight seal (electronics don't like water any more than they like EMPs), but double layer the Faraday protection by wrapping your electronics with a metal foil, or by placing them in a rolled up Mylar bag as is used in food storage, or in a manufactured Faraday bag before placing them inside the ammo can. I would be very interested to see how that experiment would measure up to the one in this video.
@MrMace313 Жыл бұрын
I have also seen people just use aluminum foil as a conductive material. Just sand the top of the ammo can.
@blueschild613 жыл бұрын
Thanks for taking the time to upload this. I was on the fence about building a "hammo can". But now I am definitely going to build one... or six.
@andrewevanoff11926 жыл бұрын
I'm glad someone like you puts out videos on this subject. There are way too many people making videos about EMP, who have no clue about the basic physics of the process. One guy was using a stun gun to test his "EMP bags" for "EMP Protection", LOL. One thing I wanted to add. Stainless steel based gasket will probably work best for the metal enclosure. Copper based gasket may develop galvanic corrosion at the contact. If this is the only choice, adding some NoOX may help. A small amount of bearing grease or Fluid Film may also help to keep the contact surfaces from corrosion. BTW, I'd love to have a spectrum analyzer like yours. Unfortunately, they are prohibitively expensive. :( Another thing worth mentioning: I see that you are trying to make a little money on the side. Nothing wrong with that. Just a suggestion, if you don't mind. I think conductive cloth "EMP" covers for Honda EU-series generators may sell very well. I don't think anyone else is making a similar product. Honda sells a regular cloth cover for their EU1000 and EU2000 inverter type generators for about $18. Perhaps making something similar with a longer "skirt" at the bottom may sell very well. You have the tools to make proper testing of the product. Any decent seamstress can make one fairly easily. Patent it and make a little money. Best of luck to you!
@disasterprepper6 жыл бұрын
Thanks Andrew. All good points, and I appreciate your suggestions.
@HabitualButtonPusher6 жыл бұрын
Exactly. This is text book as far as EMP testing. Best channel hands down for this.
@snakeeatertactical53916 жыл бұрын
There is so much bad info out there regarding EMP so I appreciate your thorough testing procedures. I have a question about testing Faraday cages at home without test equipment. Is calling a cell phone that's inside a Faraday cage a good poor man's test? I used this method to test a Ziploc style Drishield brand bag and the phone still rang. Thank you!
@G-J33 жыл бұрын
@Andrew please get back to me about this
@BytheWay3336 жыл бұрын
I bought a water making machine (a dehumidifier...lol) and will put it in a trash can faraday cage! Thanks for making these videos...your testing makes me feel better about what I've made! Again, THANKS!!!
@disasterprepper6 жыл бұрын
You're most welcome.
@giantjunk75765 жыл бұрын
An EMP will probably take out the power grid. So I will assume you plan to run your dehumidifier off a solar generator?
@a32k574 жыл бұрын
You can just use rolled up aluminum foil off the shelf where the gasket goes too, and don't forget to insulate the inside for static buildup and maybe ground the box! It's low frequency anyways, though.
@charliehill69149 ай бұрын
I'd like to see a test of a DOT HAZMAT DRUM with the metal band clamp lid.
@khendricks74906 жыл бұрын
Dr. Bradley. Could you use aluminum foil to make a wrap around the issued rubber gasket and then reinstall it. It would seem like that would make a similar conductive seal from the sanded edges and still give some water resistance by the cushion deflection of the rubber gasket. It may not be as good as your professional gaskets but I wonder how effective that would be for those of us on a rock bottom budget. Might you do such a test? Thanks for your service to the country in doing these videos.
@disasterprepper6 жыл бұрын
I think it would work fine, but getting the foil wrapped gasket back into the channel would be difficult.
@leefithian37043 жыл бұрын
Just use a fine layer of carbon fiber
@CyprusTM2 жыл бұрын
@@leefithian3704 I used the aluminum tape that HVAC people use to seal pipes :)
@vlogsurfer2 жыл бұрын
I have done this and am here because after enough opening and closing of the box, the foil tape comes loose from the rubber (that is the problem - getting it to stick well to the rubber). The copper foil tape ends up bunching up and turning into a clump and coming apart. A I have done this on a large trash can, though, and gotten pretty good results after removing the handle on the top and foil taping over the holes and then installing some weather stripping around the lid, and then applying the foil tape all around on top of the weather stripping. Then, in order for it to really block, I use tie downs with ratchets on them criss-crossed across the can. So, yeah, there are work arounds, but I think i am going to try his gaskets. And to @Lee Fithian, I don't think that is conductive because I believe that the gum on the bottom might insulate it from the surface to which it adheres...not sure though.
@PappaLitto2 жыл бұрын
I literally thought, hey an ammo can would make a good faraday cage, so I google it and BAM there you are again first search result lol
@angeluberto20916 жыл бұрын
Thank you for this and all your videos. Although I used the aluminum duct tape with OEM gasket (had not seen your video with after market gasket), I am glad to have confirmation of shielding properties. I will be enhancing by removing the paint on lid and can's top edged as you have. Thank you!
@disasterprepper6 жыл бұрын
Glad the videos were helpful.
@toml.8210 Жыл бұрын
After you take the rubber weather seal out, you need to keep your ammo can in a dry, protected place, or cover it with a heavy plastic bag. Condensation ihjside the can is just as bad as an EMP.
@peterdietrich9491 Жыл бұрын
you culd use the rubber gasket and wrap it with alu foil or alu tape
@jenniferasbury7564 Жыл бұрын
Excellent video, great presentation and demonstration! Thank you!
@ghostwalkerairsofttech1947 Жыл бұрын
alternatively, get some cardboard and some faraday fabric wrap strips of cardboard in the faraday fabric put that in your gasket channels..mission darkness is THE best faraday fabric I've used. You still need to sand off the paint so that the nickel conductive material (fabric) makes metal to metal contact.
@robertbrady37832 жыл бұрын
Great video! Why wouldn't you just sand the lid and can as you did in the video, then apply a conductive coating to the original gasket?
@curtwuollet2912 Жыл бұрын
Covering the original rubber gasket with much cheaper copper tape also works well bridging to bare metal along side.
@jasonvu74 жыл бұрын
A really appreciate you. Thank you 🙏🏾
@logithinkearthling32614 жыл бұрын
If someone designs emp shielding clothes, that would really sell.
@michaelh4656 жыл бұрын
Really appreciate your videos.
@disasterprepper6 жыл бұрын
Thanks!
@Richard-mz7qu5 жыл бұрын
Thank you for another great informative video. I (like so many others) really appreciate your efforts.
@disasterprepper5 жыл бұрын
Thanks Richard.
@RyanQuintanapolymath3 жыл бұрын
cool video. what happens if you just grind the paint off the hinge pin contacts? another variable is also soldering a wire to alligator clip a grounding wire connected to a copper pipe from the cold water inlet
@canamshooter91046 ай бұрын
Good morning Doctor, greetings from the 906. New subscriber here to your channel. I wish ALL KZfaq video producers were as informative as you are! I have a question: In your opinion would removing the rubber gasket from the can, sanding to bare metal, wrapping the gasket in a stainless or copper rodent mesh and reinstalling it work as well as a factory manufactured metal wrapped gasket? Thank you in advance and please keep the good content coming!
@Mrradio01-156 жыл бұрын
Love your videos! Thank you for these
@disasterprepper6 жыл бұрын
Thanks Chris.
@SteveSnowman Жыл бұрын
Outstanding.
@jamesswain1002 жыл бұрын
Very impressive Doc!!
@Lima1a6 жыл бұрын
Thank You for this info.
@andrewmccarthy41444 ай бұрын
Thank you, Doc, your videos (can't believe I haven't seen this one, before) are the best, as are your products. One question on this: Is the adhesive conductive? Or could the impressive results be even better? Thanks
@EdRossi6243 жыл бұрын
Thank you for the info and proof. Going to place an order at your site.
@disasterprepper3 жыл бұрын
Thanks Edward.
@stuartgray5877 Жыл бұрын
Good explanation. My family business was building EMI/EMC test facilities for many years. Hint: Want the VERY BEST EMI shield? Put the ammo can in a big Ziplock bag then submerge it in a 55 gallon drum full of mercury. 🙂
@kathypaaaina39535 жыл бұрын
Aloha Sir bless your family Hugs and prayers from me 2 U from our family from Hawaii Oahu
@disasterprepper5 жыл бұрын
Thank you!
@mr.e33114 жыл бұрын
Great stuff!!!
@user-wg3fe3ij2o Жыл бұрын
I thought dude was strapped into an electric chair 😂
@RevGunn-jq3cq5 жыл бұрын
Why not just wrap the contents in aluminum foil. What do you do when the metal starts to rust?
@peterdietrich9491 Жыл бұрын
wrap the rubber gasket with fine copper wire
@user-pk8bg2lp9k Жыл бұрын
Yeah, but have you ever looked at those big aluminum truck bed tool boxes? Would one of those work for a Faraday Cage??
@fiaziqbal32793 жыл бұрын
Great info. Doc!👍
@DavyCrosier3 жыл бұрын
This man looks like the marksman from season 1 of Shooter. 😂 In all seriousness, great video!
@disasterprepper3 жыл бұрын
That's so funny... so far, I've heard that I look like "Death" from Supernatural, Bill Bixby from the Hulk, and now the marksman from Season 1 of the Shooter. Keep 'em coming!
@Patriotalliance6 жыл бұрын
Great information, many thanks.
@crazysquirrel9425 Жыл бұрын
EMP Gaskets From $70.00 - $260.00 Cost to make those is about $3....
@johnthompson95133 жыл бұрын
Like that door you have
@supertom85524 жыл бұрын
Great info , thanks 👍
@DenialDan28 күн бұрын
I understand this video is was uploaded 6 years ago but I have a question. Could you in theory do the same using aluminum foil wrapped around the original rubber gasket instead of the conductive gasket? Would it be as effective or maybe slightly less effective?
@jimandjackandhank79382 жыл бұрын
Will you do a video using the foil backed insulation
@willnevertell5664 Жыл бұрын
folded up foil and foil tape would do the same thing and cost a lot less but as I'm typing this I see you are selling the gasket lol
@douglassmith20553 жыл бұрын
Seems like one could simply ground the lid to the base with some copper wire. Keep the good factory rubber gasket.
@disasterprepper3 жыл бұрын
They certainly could do that. Unfortunately, grounding won't help the can to shield any better. It's a common misunderstanding, but grounding has no effect on EMP shielding. It has to do with the frequencies and distance from the EMP source, i.e., far-field vs near-field electromagnetic waves. The short of it is that any conductive barrier will provide shielding through absorbing and reflecting the incident wave, grounded or not. What's important is to seal up the narrow seams, which act as efficient receiving antennas.
@extendedp16 жыл бұрын
Thanks!
@khendricks73952 жыл бұрын
Have you tried it with a piece of thicker aluminum which is 0.019 inch thick (unpainted aluminum roll valley coils) which is used in construction and is stocked at hardware and building materials stores. A piece can be made that is a inch or so larger on both axis's than can circumference dimensions. Just sand down rim of can like you show and then lay the thin sheet over top of can and hand form it down over edges (like folding a Christmas package ends)and then simply push lid with regular rubber gasket down firmly to finish form the top sheet of protection over the can. I have tried this and it forms up well and is reusable when opened again. I just wondered if you could try such a lid with your equipment. Due to scarce funds not everyone can afford the better foam system you have and lots of common folks can get these unpainted aluminum coils locally. Thanks for your great work.
@snegglederlickton1637 Жыл бұрын
Can you please test this but with thickly wadded aluminum foil as a seal?
@joanies67782 жыл бұрын
What about a refrigerator, stove, or freezer? Could you store items in a large metal appliance and just use metallic tape to seal off any openings and around the doors?
@paulhess3771 Жыл бұрын
Can you just add a wire to connect the lid to the box of the can? That would be cheap.
@survivalscott8545 Жыл бұрын
Wouldn't slapping aluminum tape over the rubber gasket work? As long as its metal to metal?
@markchase53236 жыл бұрын
My question is what is the combined frequency spectrum and field strengths of the CME and Nuclear EMPs? At what frequencies are the highest magnitude field strengths and at what point do are consumer grade electronics give up the magic smoke and therefore, cease to operate? Although the 3 V/m Radiated immunity (RI) to a modulated radiated field is a common specification for Class A (not susceptible)immunity performance, I suspect the Class D (damage) performance is probably +26 dB (60 V/m) or more. Back around 1999 we used an ammo can to shield a video camera. We had cables to be shielded and filtered also, but only needed 34dB minimum shielding effectiveness for 150 V/m RS monitoring. Paint and rubber gasket were removed and a fabric gasket was installed just like your conversion. It worked great.
@disasterprepper6 жыл бұрын
Hi Mark, You'd have to do an inverse Fourier on the EMP signal to get an exact answer to your question regarding field strength across frequency. Of course in the ideal "impulse" case, the field level would be nearly the same across all frequency (a true ultrawideband pulse), and the max field would be somewhere between 30 kV/m and 50 kVm, depending on who you believe. There are at least five different reputable groups who have published predictions of field levels of a nuclear EMP. Of course, field strength is only one aspect of survivability. Offending frequency, receive conductor length, orientation, and impedance, as well as nearby radiators and ground planes, all fold into it. CMEs are an entirely different beast. They have very low frequency content, perhaps only into the 10's of Hertz. Because of their wavelength, they will only couple into very long conductors (such as power transmission lines, or long buried conductors). What ends up mattering with them is the induced current in those long conductors, which can damage transformers and other associated electronics.
@nathanhale7444 Жыл бұрын
Is it actually making metal to metal contact even with the adhesive? Or does the metal gasket wrap around to the underside?
@catsmeow79465 жыл бұрын
Excellent
@frenchroast1355 Жыл бұрын
Is there a way to make a poor man's gasket? You use the term "conductive material" on the gaskets. Could you put a layer of aluminum foil over the rubber gasket and get the same effect?
@sirnmpreps-a-lot Жыл бұрын
Just curious about something. I see other appliances plugged in, in the back drop of the video. You also have a video camera not protected but when you run the test the recording camera doesn't konk out. Why is this?
@pauljconroysr4080 Жыл бұрын
@empdoctor Question since the Rubber seal on the ammo can is not conductive why would you then leave it in so then the can is water proof to a point as it is intended to be . and then sand that paint off the handle locks on the lid as it would then conduct any energy thru that way ?? cause if i remember right that paint has certain properties in it to limit certain things .
@CR-tj4ig Жыл бұрын
Can you just seal the outside of the ammo can with aluminum tape and call it a day?
@davegunning637 Жыл бұрын
Can I take the rubber gasket in the ammo can like you have and wrap that in foil copper tape and reinstall it? Will that work in protecting from an EMP or do I need to get the gaskets you shown in the video?
@lap92164 жыл бұрын
Using the dremel on the can only, leave the lid the way it is and then use an aluminum foil sheet and place it between the lid and the can when you close it. Wouldn't that work?
@matthartman7062 Жыл бұрын
Won’t the adhesive sit between the metal, preventing metal to metal contact?
@stewmiller778 Жыл бұрын
That's my question, too. Is the adhesive conductive?
@stewmiller778 Жыл бұрын
I checked the mft. the adhesive does not cover the entire strip. it is either in the middle or on each edge, leaving conductive material touching both parts.
@robinflory6109 Жыл бұрын
Question....should you line can with non conducting material like cardboard?
@jonneveu2 жыл бұрын
Dr. Bradley - could you, with the ammo can lid open, cover the opening with metallic duct tape (overlapped with no gaps) and then close the lid?
@disasterprepper2 жыл бұрын
A better solution might be to attach carefully cut conductive tape strips over the black rubber gasket. I'm not sure how long it would last before tearing, but I think it would work okay.
@jonneveu2 жыл бұрын
@@disasterprepper Wow - thanks for the quick reply!!
@jonneveu2 жыл бұрын
@@disasterprepper I don't have the equipment to test my original suggestion above... could you possibly test? Also, I am wondering if you could test simply open the ammo can, lay a doubled up piece of aluminum foil over the top of the can and carefully molding it down the sides without ripping or tearing and then closing the can. Again, it would be very interesting to see this tested. Thanks for all you do!
@jonneveu2 жыл бұрын
@empdoctor I don't have the equipment to test my original suggestion above... could you possibly test? Also, I am wondering if you could test simply open the ammo can, lay a doubled up piece of aluminum foil over the top of the can and carefully molding it down the sides without ripping or tearing and then closing the can. Again, it would be very interesting to see this tested. Thanks for all you do!
@nonweaponizedpreparedness Жыл бұрын
I have a 30 caliber ammo can and several 50 caliber ammo cans. Wanting to make the 30 caliber into a Faraday cage for my ham radio handheld. How would I go about building my faraday cage?
@Firemedic2105 Жыл бұрын
Maybe I missed it, but when can you open your can? My understanding is the atmosphere stays charged for a while after an EMP… Would it not destroy things if you open it too early??? If that is the case, any ways to test if things are discharged enough it’s safe to open?
@walterbargersr34022 жыл бұрын
To the EMP doctor awesome video I have a question for you do you make a device that you can just plug into a generator or hook up to a generator to protected from EMP being disabled it is hard to by the cloth by the lineal foot thank you God bless
@dustya1982 Жыл бұрын
What about a popcorn or cookie tin
@GeneLucas29414 жыл бұрын
Great videos! How did you get it to work so well without grounding the ammo can? Or is grounding your cage not always necessary? When is it necessary?
@disasterprepper4 жыл бұрын
Grounding a Faraday cage really doesn't have any effect on the shielding performance. The metal itself acts as a protective barrier by redistributing charge carriers (electrons), thereby helping to cancel the field inside the cage. Grounding of Faraday cages is only done when there is electrical breakdown (a big spark) that you're trying to shunt away. That's not the case with an EMP.
@elio92076 ай бұрын
What material is for EMP protection.EMP blast and electromagnetic..rfid Metall, steel or aluminium ? Wisch one to is better?
@martymiller9802 Жыл бұрын
Doesn’t the adhesive degrade the conductivity?
@obsidianet2 жыл бұрын
What if you grounded the box to earth ground?
@pastayumyum6 жыл бұрын
Would sealing the ammo can lid with metallic duct tape offer adequate protection ? I have really enjoyed your books.
@disasterprepper6 жыл бұрын
Yes, I suspect it would work fine, especially if you have metal-to-metal contact. Taking the tape off is a bit of a pain, which is why folks wanted to know how to use gaskets. Glad you're enjoying the books!
@willspanish5 жыл бұрын
Super helpful and informative, thank you! Subbed and you have my business :)
@disasterprepper5 жыл бұрын
Thanks Will.
@billsmith96582 жыл бұрын
how well do you think the ammo can would do if you didn't sand the paint down , but did use a conductive gasket ?
@disasterprepper2 жыл бұрын
It does fine with a conductive gasket but no sanding. I need to go back and re-do the video and show that.
@llgoldstein27103 жыл бұрын
If I also wrap my electronics in a layer of aluminum foil will the ammo can be sufficient for an EMP event? Would a double layer of foil work better?
@dannyburns415213 күн бұрын
Can you use aluminum foil as a gasket?
@brianreilly70796 жыл бұрын
Do you recommend lining the can with something like cardboard or rubber to prevent the can walls from conducting current to whatever you have inside, or does it matter?
@disasterprepper6 жыл бұрын
Most electronics are already housed in plastic, so it's probably not necessary. That said, if there are exposed antennas or charging ports, it's a good idea.
@giantjunk75765 жыл бұрын
Whatever you put in the can; put in an ESD bag first. It will add not only additional emp protection; It will also help protect from conducting from the can to electronics.
@GetUrPhil2 жыл бұрын
Would you be able to do the ammo can with aluminum around the rubber gasket? Ground to bare metal of course.
@frankiej25803 жыл бұрын
How bout wrapping the rubber gasket with aluminum tape
@disasterprepper3 жыл бұрын
You could perhaps lay the tape in on top of the gasket, but if you ever pull it out, you'd have a very hard time getting it back in. It's under compression, and once removed, it won't go in easily.
@MrDazzem2 жыл бұрын
If the emp test doesn't damage the unprotected camera your using, what's the point?
@joewiehr1931 Жыл бұрын
Does lining the ammo can and lid with rubber help?
@cowboy8982 жыл бұрын
I have a question for you. I have a number of electronic in a metal shed that is grounded to the earth and the electronic are grounded to the earth as well. But the shed has a wood floor. Do you think that those electronics are safe from an emp?
@scdave1006 жыл бұрын
Thanks for the video. Would you be willing to do a test using light weight metallic backed duct board insulation used in the heat and air industry? Maybe used for making a box to cover a generator???
@disasterprepper6 жыл бұрын
That's been on my list of things to do for some time. I know lots of folks are using it. I'll see if I can get some of the material to conduct a test.
@scdave1006 жыл бұрын
disasterprepper That would be great! Thanks!
@donalddicorcia24332 жыл бұрын
Would a gasket moulded from silicone mixed with aluminum powder be a viable option?
@linxquantumpointhealthsolu70552 жыл бұрын
Because conventional EMP devices produce explosions driven by HPMW technology, they may have a frequency in the range of 100 MHz - 100 GHz. EMP, depending on altitude and power, can generate electric fields up to levels of 50 kV / m. Will these boxes, or any faraday cadge for that matter really provide protection at these levels?
@disasterprepper2 жыл бұрын
Nuclear-generated EMP devices are typically thought to produce radiated energy from about 1 MHz to 1 GHz. Electric field levels can ready 50 kV/m, although some people claim "super EMP" weapons can reach perhaps 200 kV/m. I don't know that such devices have ever been seen in the real world though. A box or EMP bag that provides 50 dB shielding will reduce a 50 kV/m signal down to around 158 v/m, survivable by nearly any electronic device. I'd be comfortable depending on such products to ensure the survivability of small electronics.
@MI_Prepper11 ай бұрын
How important is grounding the ammo can?
@timmccabe5036 жыл бұрын
Could you wrap the existing rubber gasket with either aluminum foil or aluminum tape? Still going to bare metal with your dremel tool.
@disasterprepper6 жыл бұрын
Yes, I think this would work, but getting the rubber gasket back into the channel would be difficult. Also, I'm not sure how durable the foil would be. Still, it's an idea...
@stevefrank3536 жыл бұрын
I was thinking of doing exactly this on my 50 cal ammo can VHF/UHF radio. I have a 2-1/2" roll of aluminum duct tape that measures .004" thick. This feels much thicker than heavy duty kitchen aluminum foil. It also measures a very low resistance with an ohm meter except where the printing is on the foil. However the printing ink/paint is very thin and can easily be removed with an abrasive pad. I think prepping the can and lid, cutting the tape narrower, then folding the tape around the rubber gasket (with the fold facing to the outside of the can) would work very well. The adhesive side of the tape measures a higher resistance than the non sticky side so make sure only the adhesive free side touches the can and lid. The tape seems tuff yet fairly malleable and conforms well to the edge of the can without tearing so I think it would last a while. Even if it needs replaced periodically one roll would probably last forever. I wish I could subject it to a quantifiable test!
@angeluberto20916 жыл бұрын
@Steve Frank - I took this very approach (the aluminum duct tape) and rapped the entire OEM rubber gasket. To ensure the tape would be strong, I doubled it on the side that makes contact with the can. I also used a cheap black rubber floor mat as isolator within the can making sure that edges overlapped at the corners. Not folded over but one side tucks behind the other at each corner. Finally, the bottom so it is all lined. This ensured that no items within would come into contact with the can. What I did not do, but will after seeing this video, is remove the paint on the lid and can's top edge. I should have though of that but not a difficult enhancement.
@joelwatkins4377 Жыл бұрын
Or....maybe put the ammo can in a galvanized trash can? Lol
@grndhg86d2 жыл бұрын
What do you think about mounting a grounding strap from the box to the lid?
@disasterprepper2 жыл бұрын
The trick would be getting the gaskets back into the channel. I did see photos of someone who used copper tape on the gaskets, and that looked to work well.
@craigjacob37043 жыл бұрын
Could you wrap the rubber gasket in copper shielding tape?
@duffman590005 жыл бұрын
A post on Reddit brought me to your videos and I want to thank you for spreading the knowledge you have. But I noticed in your testing that you have used 3 different lemgth antennas for the 3 value readings. I would imagine that the reading would be different if you changed the antenna for open air readings. What was the reasoning for changing this?
@disasterprepper5 жыл бұрын
Hi Kevin, I only used one broadband antenna for the transmit pulse and a simple duck antenna for the spectrum analyzer across all tests. Can you point to what you're seeing that looks like different antennas?
@duffman590005 жыл бұрын
@@disasterprepper thanks for taking the time to answer as I know it's probably not the most fun thing to do, the antenna I am talking about is the rubber duck antenna attached to the spectrum analyzer. It appears that the antenna for open air and conductive gasket appear to be the same but the antenna for rubber gasket test appears to be shorter in length with a moulded notch just after the pivot point (5:27 mark in video) Even with this observation I do not see how you could have used this to manipulate the end result so I do not think that is happening. Just a new ham trying to see if there was any rhyme or reason Thanks again and I can't wait to see what whole home surge protection device you create!
@duffman590005 жыл бұрын
@@disasterprepper I have created a quick Google album with screenshots instead of having to chase through the video. photos.app.goo.gl/dDLp3EEiHZWg6bWv9
@disasterprepper5 жыл бұрын
Ah, after you sent the images, I see what the confusion is. For any given test (say an ammo can), i stay with a single antenna not to affect the results. On another test, say the conductive cloth, I might use a different antenna, although they're all very similar in performance. The idea is to compare a free space measurement and a shielded measurement with the same setup for any given configuration. It really doesn't matter if I change antennas when testing different items as long as the antennas are all able to receive the transmit frequencies.
@mobilecomptrek8 ай бұрын
Why doesn't the adhesive material interfere with the conductivity? Is it made of some type of conductive material?
@disasterprepper8 ай бұрын
The adhesive is actually made to be conductive, but it's also just so thin that there's not a measurable gap for high-frequency energy to get in.
@mobilecomptrek8 ай бұрын
@@disasterprepperYes, I did a few searches and found out there are conductive adhesives. Love your videos. Thanks!