I just found your channel the other day. You give preppers a good name! I really enjoy the fact that you're actually a scientist. EMP chatter on UA-cam is just so contradictory that it's laughable. The radio test in a Faraday cage is gospel truth to the effectiveness of the cage and I remember several guys grounding them as well. I think I'll just listen to what you have to say... speaking of listening, in future videos, can you turn up your volume when you make your video? Maybe it's just me, but I have to really turn up my volume to hear you speak and then I get some competing ambient noise. Can't wait for the next one! Thanks for sharing your knowledge!
Yes great videos excellent information and I do agree about the volume I always have to turn it up full blast to hear I thought it was just me but once again thanks for all the great videos you give us
Thanks Greg. Yes, ferrites are a very simply way to suppress high-frequency transients. Like all things, they have limitations, but they are very useful.
You've got an impressive array of test equipment. You might want to do videos on how to use an inexpensive NanoVNA to do similar tests including both suppression and frequency range.
@disasterprepper If I understand your video, #31 ferrites are the most suitable in an EMP situation? Still, I feel like the 61 covers more of the higher band. I mostly use 75 and 31 for EMI/RFI. On the other hand, I still don't see how you can find a single ferrite that is really with such a wide band and that will bring a large enough impedance to help during an EMP especially using only one ferrite. Unless you use a 77 with the limitations it has but which is wideband for an EMP issue with VHF and UHF components and high saturation.
You wouldn’t happen to have a common cable size chart would you? I’ve been going through sizes and looking to buy these ferrite’s. RG-6 RG-11 (Coax cable) Cat5e, Cat6, cat7 etc. Electrical wiring. 14 gauge 12 gauge 10 gauge 8 gauge
you mentioned a mix 31 ferrite in the beginning of this video and ended saying that a "broadband" ferrite should be used. Does this mean a mix 31 is sufficient for the attenuation of the E1/E2 pulse? Should a mix 31, 43, 52, 61 or 75 be used? Perhaps a mix 61 (200-2000MHz) and a mix 31 (1-300Mhz) in series on the wire each having multiple turns?
You're exactly right. A good ferrite might provide an impedance of 400-500 ohms at the relevant frequency. The attenuation that would provide would depend greatly the input impedance of the particular electronic device.
So wich one i can use just to protect one room? also after using this ferrites i still need to build a faraday cage to protect the rest of my electronics like tablets, cell phones etc?
on for example a solar installation where would we want to locate the ferrites? In multiple locations throughout the system? If the panels are linked together in series, paralleled to the pv combiner would it be beneficial to put ferrites on each panel or just the paralell connection to the pv combiner?
I don't know that anyone has studied this in detail, but in general, one wants to put a ferrite on every power line of any appreciable length (say over a couple of feet). A ferrite will help to mitigate sudden changes in current on that line.
I've been subscribed for years. Can you help me with a question related to our health? I've been looking into problems with radiation and electromagnetic fields on the human body. Do you have a video or could you direct me to methods for reducing this impact on the human body from smart meters? I just need something proven and based upon science and you're the best person to ask. Thanks so much!
The effects of smart meters are greatly debated, but yes, let me look into effective field reduction techniques, and I'll try to post a video on the topic. Thanks for the suggestion.
Really interesting video, I'm trying to figure out if it's possible to protect an entire home from a electromagnetic pulse, would love to hear your thoughts
It's certainly possible to install a power line filter at the input to your home (or at your fuse panel). That would help to suppress the conducted pulse, although I haven't seen any that were properly tested against the E1-E3 pulses. Protecting against the radiated energy would require either shielding the home (difficult) or shielding individual items.
How well do multiple looped ferrites (in series) attenuate? I suspect these may protect say a solar charge controller; however the solar panels would probably be fried during an EMP, correct?
Adding series looped ferrites add more attenuation. So two, double looped ferrites would do better than one. The equation to estimate attenuation can be approximated by a series divider: V = Vpulse * Zload/(Zload+Zferrite1+Zferrite2). The smaller the load impedance the greater the attenuation from the ferrites. Also, the greater the ferrite impedance, the better the attenuation.
On a long run of wire, should fer rites be spaced at regular intervals? Like every 3 feet, or just at the end of the line? Perhaps I'm asking what the effective way to use them on a conductor would be. Thanks for the assistance and videos.
Hi Dana, there is an effect in which high frequencies can set up "standing waves" on long conductors, so it wouldn't hurt to place conductors evenly spaced along a long conductor. But with that said, a single ferrite with more than one loop of wire wrapped through it is typically more effective than multiple ferrites. It never hurts to add more ferrites, but the return vs cost goes down after the first, especially if you're able to add a second (or third) loop through the ferrite.
Thank you. "Get Both" is also an option. In this case, multiple loops would be possible at the end, but would that be more effective than spaced ferrites and if spaced are used, what would the spacing be?
Loops are more effective than series-added ferrites. That is two loops are better than two ferrites. Three loops is better than three ferrites, etc. The effectiveness is supposed to go as the square of the loops, but in practice it falls short of this. Still, adding multiple ferrites is never bad. If you do that, I would suggest spacing them evenly across the cable.
An EMP will result in a complex electromagnetic disturbance that will manifest as voltages (and current) on conductors. The sharpest of those signals will look like a very narrow pulse, similar to what I simulated here with a pulse generator. The idea of using ferrites is to suppress the transients seen on small power lines feeding devices, such as computers, solar panels, etc. They likely won't eliminate the transients, but they will help to reduce them, hopefully to levels that the hardware can survive.
Would a reverse-biased shotky diode help as far as protecting against reverse voltage transients, or would the thing simply get fried when the EMP hit? If the diode WOULD help, what peak voltage and current ratings should I shop for?
A transient suppression diode from Microsemi may be adequate. Select one with the proper breakdown voltage for your application and proper pulse handling and in the needed mechanical configuration. They've got a wide range of good products. (as a former EMP Engineer (36 years ago, phew), it's nice to see this channel. I'm setting up a large solar array on my house (49 panels) and want to make sure to have EMP protection. WW3 unfortunately, is coming.
2 Questions: 1 - What is meant by an EMP Transient? Is that different from a pulse? 2 - So if I were to take some ferrites and put them around the cable to my refrigerator then my refrigerator would be safe from an emp pulse coming through the cable?
"EMP transient" is just another word for the complex (E1-E2-E3) pulse that occurs following a nuclear EMP. As for putting ferrites around your refrigerator power cord, yes, they help to suppress conducted transients (pulses). It's not possible to say if they would fully protect against the incoming pulse, however, because at high enough levels, the ferrites saturate and become less effective. With that said, they definitely help to reduce the signal that travels down the line.
Thanks for these videos. I went to your site, but didn't see any ferrites available. I was wondering what types you would suggest for emp protection? I saw mentioned somewhere to use type 61? Do you have specifics in your book? Also, have you considered setting up an Amazon store with items you recommend but don't carry on your site? (Or an affiliate link) Thanks again!
Ferrites on my site are at disasterpreparer.com/emp-ferrites. As far as type, you need to look at both the material as well as the impedance across frequency. What you want is one with the highest broadband impedance (from 1 MHz to 1 GHz).
disasterprepper thank you very much. When I went to your site earlier, the link to the ferrites didn't work for me, (Android, Chrome browser). This direct link works, thanks.
So doc. What do you think of the upcoming solar eclipse. I see all these doomsdayers freaking out. But do you think there's any possibility of a EMP event with that.
disasterprepper exactly. I just wanted to get a little reassurance from someone with some real brains. Thank you so much for your channel I have learned so much from you.
Well, I sort of agree. A ferrite is used to suppress electrical current. Current flows due to voltage differences. So, if an EMP induces a voltage on one end of a wire, the ferrite will help to suppress the potentially damaging current from flowing through the wire. Ferrites are often used in conjunction with voltage transient protection devices (such as SPDs and transient voltage suppressors) to provide well-rounded surge protection. We use ferrites all the time on cables, and they are very effective at reducing coupled energy from harming (or disrupting) an electrical system.
@EMPdoctor you might want to be careful you don't record certain equipment asset tags and calibration stickers. You might end up losing your ability to work on certain contracts or for agencies by utilizing certain equipment.
@@davidjones1393 Then you really can't use the T.R.A.P. devices on it. The good news is that a simple generator like the one you're describing has very little chance of being damaged by an EMP (assuming it's not plugged into the wall).
I just found your channel the other day. You give preppers a good name! I really enjoy the fact that you're actually a scientist. EMP chatter on UA-cam is just so contradictory that it's laughable. The radio test in a Faraday cage is gospel truth to the effectiveness of the cage and I remember several guys grounding them as well. I think I'll just listen to what you have to say... speaking of listening, in future videos, can you turn up your volume when you make your video? Maybe it's just me, but I have to really turn up my volume to hear you speak and then I get some competing ambient noise. Can't wait for the next one! Thanks for sharing your knowledge!
Thanks. Glad the videos are helpful. Yes, I'll try to turn up the volume next time.
Yes great videos excellent information and I do agree about the volume I always have to turn it up full blast to hear I thought it was just me but once again thanks for all the great videos you give us
Does grounding the cage help ?
Fascinating and very helpful, thank you! Seems like a fairly simple added measure of safety.
Thanks Greg. Yes, ferrites are a very simply way to suppress high-frequency transients. Like all things, they have limitations, but they are very useful.
Thanks again for the video and information. I just wish I had paid attention more in electronics class. : )
You're most welcome.
You've got an impressive array of test equipment. You might want to do videos on how to use an inexpensive NanoVNA to do similar tests including both suppression and frequency range.
Thanks for the idea!
@disasterprepper If I understand your video, #31 ferrites are the most suitable in an EMP situation? Still, I feel like the 61 covers more of the higher band. I mostly use 75 and 31 for EMI/RFI. On the other hand, I still don't see how you can find a single ferrite that is really with such a wide band and that will bring a large enough impedance to help during an EMP especially using only one ferrite. Unless you use a 77 with the limitations it has but which is wideband for an EMP issue with VHF and UHF components and high saturation.
Can you use ferrite beads for dirty electricity generated by power lines?
You wouldn’t happen to have a common cable size chart would you? I’ve been going through sizes and looking to buy these ferrite’s.
RG-6 RG-11 (Coax cable)
Cat5e, Cat6, cat7 etc.
Electrical wiring.
14 gauge
12 gauge
10 gauge
8 gauge
you mentioned a mix 31 ferrite in the beginning of this video and ended saying that a "broadband" ferrite should be used. Does this mean a mix 31 is sufficient for the attenuation of the E1/E2 pulse? Should a mix 31, 43, 52, 61 or 75 be used? Perhaps a mix 61 (200-2000MHz) and a mix 31 (1-300Mhz) in series on the wire each having multiple turns?
Could you provide an experiement using common mode signal/noise generated wirelessly (by radiation) so that it is more close to the situation?
Ferrites work well in low impedance systems, so, I'm wondering what the estimated source impedance would be in an EMP?
You're exactly right. A good ferrite might provide an impedance of 400-500 ohms at the relevant frequency. The attenuation that would provide would depend greatly the input impedance of the particular electronic device.
Would using more than one ferrite “in series” result in an additive effect?
So wich one i can use just to protect one room? also after using this ferrites i still need to build a faraday cage to protect the rest of my electronics like tablets, cell phones etc?
Is there any risk of danger or harm to your vehicle if you add ferrites to protect it?
Couldn't you prevent EMP-induced transients by covering cables with aluminum foil?
on for example a solar installation where would we want to locate the ferrites? In multiple locations throughout the system? If the panels are linked together in series, paralleled to the pv combiner would it be beneficial to put ferrites on each panel or just the paralell connection to the pv combiner?
I don't know that anyone has studied this in detail, but in general, one wants to put a ferrite on every power line of any appreciable length (say over a couple of feet). A ferrite will help to mitigate sudden changes in current on that line.
Thanks doc.
I've been subscribed for years. Can you help me with a question related to our health? I've been looking into problems with radiation and electromagnetic fields on the human body. Do you have a video or could you direct me to methods for reducing this impact on the human body from smart meters? I just need something proven and based upon science and you're the best person to ask. Thanks so much!
The effects of smart meters are greatly debated, but yes, let me look into effective field reduction techniques, and I'll try to post a video on the topic. Thanks for the suggestion.
Thank you. All of my friends are talking about this as well. I plan on sharing your info with them.
Really interesting video, I'm trying to figure out if it's possible to protect an entire home from a electromagnetic pulse, would love to hear your thoughts
It's certainly possible to install a power line filter at the input to your home (or at your fuse panel). That would help to suppress the conducted pulse, although I haven't seen any that were properly tested against the E1-E3 pulses. Protecting against the radiated energy would require either shielding the home (difficult) or shielding individual items.
How well do multiple looped ferrites (in series) attenuate?
I suspect these may protect say a solar charge controller; however the solar panels would probably be fried during an EMP, correct?
Adding series looped ferrites add more attenuation. So two, double looped ferrites would do better than one. The equation to estimate attenuation can be approximated by a series divider: V = Vpulse * Zload/(Zload+Zferrite1+Zferrite2). The smaller the load impedance the greater the attenuation from the ferrites. Also, the greater the ferrite impedance, the better the attenuation.
On a long run of wire, should fer rites be spaced at regular intervals? Like every 3 feet, or just at the end of the line? Perhaps I'm asking what the effective way to use them on a conductor would be. Thanks for the assistance and videos.
Hi Dana, there is an effect in which high frequencies can set up "standing waves" on long conductors, so it wouldn't hurt to place conductors evenly spaced along a long conductor. But with that said, a single ferrite with more than one loop of wire wrapped through it is typically more effective than multiple ferrites. It never hurts to add more ferrites, but the return vs cost goes down after the first, especially if you're able to add a second (or third) loop through the ferrite.
Thank you. "Get Both" is also an option. In this case, multiple loops would be possible at the end, but would that be more effective than spaced ferrites and if spaced are used, what would the spacing be?
Loops are more effective than series-added ferrites. That is two loops are better than two ferrites. Three loops is better than three ferrites, etc. The effectiveness is supposed to go as the square of the loops, but in practice it falls short of this. Still, adding multiple ferrites is never bad. If you do that, I would suggest spacing them evenly across the cable.
Install the ferrite close to the equipment to be protected.
Multiple beads = more radio frequency energy supression.
So how does that relate to the transients an EMP might cause? What kind of power/transients does an EMP have?
An EMP will result in a complex electromagnetic disturbance that will manifest as voltages (and current) on conductors. The sharpest of those signals will look like a very narrow pulse, similar to what I simulated here with a pulse generator. The idea of using ferrites is to suppress the transients seen on small power lines feeding devices, such as computers, solar panels, etc. They likely won't eliminate the transients, but they will help to reduce them, hopefully to levels that the hardware can survive.
Would a reverse-biased shotky diode help as far as protecting against reverse voltage transients, or would the thing simply get fried when the EMP hit? If the diode WOULD help, what peak voltage and current ratings should I shop for?
I don't think a schottky diode would have adequate current ratings to survive the surge.
A transient suppression diode from Microsemi may be adequate. Select one with the proper breakdown voltage for your application and proper pulse handling and in the needed mechanical configuration. They've got a wide range of good products. (as a former EMP Engineer (36 years ago, phew), it's nice to see this channel. I'm setting up a large solar array on my house (49 panels) and want to make sure to have EMP protection. WW3 unfortunately, is coming.
2 Questions: 1 - What is meant by an EMP Transient? Is that different from a pulse? 2 - So if I were to take some ferrites and put them around the cable to my refrigerator then my refrigerator would be safe from an emp pulse coming through the cable?
"EMP transient" is just another word for the complex (E1-E2-E3) pulse that occurs following a nuclear EMP. As for putting ferrites around your refrigerator power cord, yes, they help to suppress conducted transients (pulses). It's not possible to say if they would fully protect against the incoming pulse, however, because at high enough levels, the ferrites saturate and become less effective. With that said, they definitely help to reduce the signal that travels down the line.
Thanks for these videos. I went to your site, but didn't see any ferrites available. I was wondering what types you would suggest for emp protection? I saw mentioned somewhere to use type 61? Do you have specifics in your book? Also, have you considered setting up an Amazon store with items you recommend but don't carry on your site? (Or an affiliate link) Thanks again!
Ferrites on my site are at disasterpreparer.com/emp-ferrites. As far as type, you need to look at both the material as well as the impedance across frequency. What you want is one with the highest broadband impedance (from 1 MHz to 1 GHz).
disasterprepper thank you very much. When I went to your site earlier, the link to the ferrites didn't work for me, (Android, Chrome browser). This direct link works, thanks.
Thanks for letting me know. Not sure why it didn't work. I'll check on it.
@@disasterprepper the link you provided no longer works. I get a 404 Page not Found error. Is there still a valid paged somewhere?
@@tmt8425 disasterpreparer.com/?product=emp-ferrites
So doc. What do you think of the upcoming solar eclipse. I see all these doomsdayers freaking out. But do you think there's any possibility of a EMP event with that.
As far as I know, solar eclipses don't have any relationship to solar storms. Doomsdayers always freak out. That's their job!
disasterprepper exactly. I just wanted to get a little reassurance from someone with some real brains. Thank you so much for your channel I have learned so much from you.
Do I need to use any EMP protective measures for solar panels NOT CONNECTED to anything, but are simply being stored in a garage?
Some folks wrap the boxes in foil, but I don't think there's a big risk to panels disconnected from wiring.
Nope. Nothing is needed.
Ferrite will do nothing to stop the voltage induced on a conductor that absorbed an EMP pulse.
Well, I sort of agree. A ferrite is used to suppress electrical current. Current flows due to voltage differences. So, if an EMP induces a voltage on one end of a wire, the ferrite will help to suppress the potentially damaging current from flowing through the wire. Ferrites are often used in conjunction with voltage transient protection devices (such as SPDs and transient voltage suppressors) to provide well-rounded surge protection. We use ferrites all the time on cables, and they are very effective at reducing coupled energy from harming (or disrupting) an electrical system.
@EMPdoctor you might want to be careful you don't record certain equipment asset tags and calibration stickers. You might end up losing your ability to work on certain contracts or for agencies by utilizing certain equipment.
HI JUST GOT SOME WERE DO I PUT ON THE CHAMPION GEN
Hi-sat ferrites would go around the power wires from the battery, one ferrite per wire.
@@disasterprepper NO BATTERY PULL START
@@davidjones1393 Does it have a cigarette lighter plug?
@@disasterprepper NO
@@davidjones1393 Then you really can't use the T.R.A.P. devices on it. The good news is that a simple generator like the one you're describing has very little chance of being damaged by an EMP (assuming it's not plugged into the wall).
UNCLEDOUG HERE WISH I KNEW MOOR ABOUT EMP SUPPRESSION ?????