Thread: EMP

Does anyone know how to create an EMP ?

I know that nuclear blasts create EMP's, but im talking about a device that would ONLY create an EMP and nothing else; also I dont want the range to be any more than about 3 feet.

Thanks.

I have no idea, but if i hear a large bang and then see a large mushroom cloud to the north of me, I'll know you got it wrong.

Nuclear explosion
A electromagnet with a strong magnetic field.
Fries every electronic device within a radius if strong enough

Jeesh what a load of bollocks!

An EMP bomb works by charging a huge coil then setting off a systematic charge from one end along it's length, as the explosive destroys the coil the energy of the destroyed part is transferred to the remaining 'working' part, eventually you have what amounts to a highly compressed field in a very tiny space, which then instantly collapses, throwing out a huge electromagnetic pulse. Anything metalic, or conductive will induce small electrical charges which may be enough to damage some electronic eqipment. It is a myth to suggest that all (or even) most things would be affected.

Leo if you are looking at screwing the neighbours, hi-fi behind the wall, never mind making the coil, the explosives alone needed, will do the trick!

Originally Posted by Megabrain

Jeesh what a load of bollocks!

An EMP bomb works by charging a huge coil then setting off a systematic charge from one end along it's length, as the explosive destroys the coil the energy of the destroyed part is transferred to the remaining 'working' part, eventually you have what amounts to a highly compressed field in a very tiny space, which then instantly collapses, throwing out a huge electromagnetic pulse. Anything metalic, or conductive will induce small electrical charges which may be enough to damage some electronic eqipment. It is a myth to suggest that all (or even) most things would be affected.

Leo if you are looking at screwing the neighbours, hi-fi behind the wall, never mind making the coil, the explosives alone needed, will do the trick!

tell that to the satelites that was burned when they detonated a nuclear bomb in space. and it was not cause of the heat they. and several cities got power problems when they detonated it

I'm not going to argue with you on this one, I spent 5 years in electronic counter-measures. You will not find any definitive description of the P.O.O on the net, the closest you'll get is what I have previously said.

You are told that nuclear weapons produce vast EM Pulses which can knock out anything, yet the planes that dropped the Hiroshima/Nagasaki bombs suffered no ill effects, No monitoring equipment for underground test's ever failed either, - look beyond the crap your are told, the hype, - real truth (beilieve it or not) is that I could produce a larger EMP pulse with 100KGs of explosive than you could with any standard Nuclear blast bomb.

As to your satelites being destroyed, you were not a party to any tests, and have no access to the data. :wink:

Is that true MB? what about a high altitude detonation? or is all that hollywood bullocks?

Originally Posted by Megabrain

You are told that nuclear weapons produce vast EM Pulses which can knock out anything, yet the planes that dropped the Hiroshima/Nagasaki bombs suffered no ill effects, No monitoring equipment for underground test's ever failed either, - look beyond the crap your are told, the hype, - real truth (beilieve it or not) is that I could produce a larger EMP pulse with 100KGs of explosive than you could with any standard Nuclear blast bomb.

on the planes back then were was very little electonics, it was mainly hydrolics, plus they had the added benefit or the bomb having a timer so they could get away first 8) . As to the underground testing facilities, i think lead stops an EMP, so perhapse they used that

So far as I am aware, non of the research undertaken by any government has been released [since to do so would clearly give an enemy the knowledge to counter it!], most, if not all you read has been written by people outside the industry, - Whilst I have not been privvy to any of that research directly, I have been involved with equipment designed to work in 'blast zones' I can only state from this that the type of protection incorporated is not in my opinion directly aimed at the type of innefficient radiation experienced during a nuclear blast, In commenting here I can only quote on-line sources, wiki indicates that primary EM radiation from either a nuclear device or asteroid strike is wideband between 3hz and 30Khz. If you want to destroy [for example] domestic electrical equipment the radiation required would need to be at least 10's of Mhz, (Military equipment is something else). I suggest that an EMP bomb of any description would only affect unprotected equipment, at best it would cut off the population from it's source of news, and destroy mobile [phone] base stations and mobiles. Surprisingly to protect equipment from an EMP could cost as little as $1 a box! - as I have said before lighning produces quite a large EMP - it can be heard on an AM radio many thousands of miles away, yet even if it struck within 50 metres of your home it would destroy nothing in your house, the radiation is too wideband to cause resonance in any particular circuit.

Theoretically 'strategic emp devices' can be made to target specific systems, much like crystal glass can be subjected to a particular sound (different for each piece of glass).

As to nervyn's comments the planes were packed with monitoring equipment, as have been all test sites ever since.

ah well, this happend qite along time prior to me existing

No monitoring equipment for underground test's ever failed either, - look beyond the crap your are told, the hype, - real truth (beilieve it or not) is that I could produce a larger EMP pulse with 100KGs of explosive than you could with any standard Nuclear blast bomb.

mega, what is the differens between space and earth surface, what does the surface have that space lack? :x
(take a deep breath and stop breathing)

http://en.wikipedia.org/wiki/High_al...lear_explosion
read it mega

seems like ive read more than you once again since i have found this on other palces aswell and is able to figure out that this should happen anyway

I don't really care how much crap you have read Zelos, it does not amount to an hour's worth of my invovlment in the industry. - You have shown yourself in the past to seriously lack any practical experience of EM knowledge or technology, though doubtless you have read much.

Exactly what practical knowledge/experience do you have apart from what you have read?

Originally Posted by Nevyn

Originally Posted by Megabrain

You are told that nuclear weapons produce vast EM Pulses which can knock out anything, yet the planes that dropped the Hiroshima/Nagasaki bombs suffered no ill effects, No monitoring equipment for underground test's ever failed either, - look beyond the crap your are told, the hype, - real truth (beilieve it or not) is that I could produce a larger EMP pulse with 100KGs of explosive than you could with any standard Nuclear blast bomb.

on the planes back then were was very little electonics, it was mainly hydrolics, plus they had the added benefit or the bomb having a timer so they could get away first 8) . As to the underground testing facilities, i think lead stops an EMP, so perhapse they used that

Just to let you know, the bomb did not have a timer, it had a barometric (or something like that) pressure sensor, which detonated the bomb at the requested altitude.

Originally Posted by Megabrain

So far as I am aware, non of the research undertaken by any government has been released [since to do so would clearly give an enemy the knowledge to counter it!], most, if not all you read has been written by people outside the industry, - Whilst I have not been privvy to any of that research directly, I have been involved with equipment designed to work in 'blast zones' I can only state from this that the type of protection incorporated is not in my opinion directly aimed at the type of innefficient radiation experienced during a nuclear blast, In commenting here I can only quote on-line sources, wiki indicates that primary EM radiation from either a nuclear device or asteroid strike is wideband between 3hz and 30Khz. If you want to destroy [for example] domestic electrical equipment the radiation required would need to be at least 10's of Mhz, (Military equipment is something else). I suggest that an EMP bomb of any description would only affect unprotected equipment, at best it would cut off the population from it's source of news, and destroy mobile [phone] base stations and mobiles. Surprisingly to protect equipment from an EMP could cost as little as $1 a box! - as I have said before lighning produces quite a large EMP - it can be heard on an AM radio many thousands of miles away, yet even if it struck within 50 metres of your home it would destroy nothing in your house, the radiation is too wideband to cause resonance in any particular circuit.

Theoretically 'strategic emp devices' can be made to target specific systems, much like crystal glass can be subjected to a particular sound (different for each piece of glass).

As to nervyn's comments the planes were packed with monitoring equipment, as have been all test sites ever since.

Not to mention that any information that you did come accross you would have to keep secret; my guess is that you would have signed the official secrets act ?

(I had to when I joined the TA)

Yeah, I think it was upto "Nato Secure Secret" if I remember properly.

Of course nuclear weapons produce an EMP. The xrays from the nuclear explosion knock electrons off of atoms in the air, and the electrons spiral in the earth's magnetic field. You'll find basic information about this in almost any freshman physics textbook.

Originally Posted by Scifor Refugee

Of course nuclear weapons produce an EMP. The xrays from the nuclear explosion knock electrons off of atoms in the air, and the electrons spiral in the earth's magnetic field. You'll find basic information about this in almost any freshman physics textbook.

exacly, mega who were right?

I do not think I said they did not produce an EMP, I said I could make a more effective EMP with 100Kgs of high explosives.

Is there any way though, of creating an EMP without the explosive bit ?

yeah, there are EMP labs where they generate large EMP's to test equipment, - what is it you want it for?

Nothing in particular, I just want to experiement and play around with it.

Well to do that you will need some sort of a detector, as you cannot see these pulses, a good one would be a loop of wire about 10cm diameter with the ends soldered to an LED, if you succeed in generating a pulse the led will flash.

Now you need a source, take a 2 Metre length of 15mm copper pipe and wind it into a coil of about 3 turns (do NOT kink it though!, next charge a 200,000uF capacitor to about 12 volts and short it to the capacitor.... Caution wear protection...

You might be able to an old watre heater cylinder and user the copper coil from inside - clean ALL the corrosion off the outside of the coil though. At high frequencies electrons travel on the surface of wires and NOT through the middle! - see "Skin effect"

Okay thanks, right so where can I get one of these capacitors from ?? Would maplins sell it ? How does one charge a capacitor ?? Would wiring it up to a 12volt car battery do ?

Then when you say "short it to" the copper pipe coil, i take it you mean simply take the charged capacitor and touch the metal sticky out things to the metal of the pipe ?

I had to fix my 700 watt PSU on my computer 3 days ago. (The bearing on the fan was knackered and making a hell of a noise) So, I opened up the PSU to replace the fan. (As crappy PC World said it wasnt fixable as its a sealed unit and as i had lost the receipt it would mean me buying a new one) - Anyway.........sod them....I fixed it myself. I did notice an enormous capacitor in there. Would something like that do ?? Reason I ask is that I have an old 450 watt PSU kicking around somewhere gathering dust.

Let me tell you this, I have a well equipped lab, it contains all sorts of equipment capable of generating and analyzing all sorts of electronic equipment, in terms of EM pulses I could detect them from about 3hz to around 4.5Ghz - I could sit down and design a small EMP generator the calculations would involve Maxwell's fieldd equations and a whole host of others, after much thought, and some design I could put one together and with my kit improve it to a point where I could probably destroy things within about 50cm of the 'head' - Without this kit, and my knowledge of electronics I reckon it would be a million to one I could achieve this.

Simply put you need to generate a huge electrical very short duration transient pulse, and apply it to an inductance at resonance then instantly destroy the inductance. You could probably buy enough caps from Maplin but getting the control circuits spot on would be almost a nightmare, especially since it would be a 'one off' job.

You might like to trawal the net for something "EMP Circuit diagram".



See:- http://science.howstuffworks.com/e-bomb1.htm

Now on page three I see there is a diagram, which I am amazed to find is on the net but there it is, if you check this against my original description you will see it is the same. - this one is a non-nuclear device!

Okay, it sounds to be a little more tricky than i first thought. :?
Ill stick to rockets I think.