Building an EMP Generator

[solutions]

http://www.tgdaily.com/security-brief/67629-pentagon-eyes-advanced-emp-grenades

[optikon]

 Granted, the discharge was only 70 - 120ns wide and at ~ 3 kA, its not hard to make an EMP

~ 8 Joules of energy, LOL
What about X-rays?

[solutions]

Xrays won't work well against hardened government targets.

Like Congressmen:



 

[metal]

simpsons

[bbarney]

Metal didn't we just mute that guy 

[WhiteKnight]

A video on the subject.
http://www.boeing.com:80/Features/2012/10/bds_champ_10_22_12.html

[thunderer]

Why build one, when it is so inexpensive to buy one: http://electronicdesign.com/blog/what-devil-emp-and-should-you-be-afraid

[solutions]

"You can actually buy an off-the-shelf 1.8 gigawatt EMP generator for $14,000 for “research” purposes."

Divide by 100 and we'll talk "cheap"

[solutions]

Depends what you want to do with it. A focused microwave beam doesn't need 1.8GW. A microwave oven is a bit over a kilowatt and sparks fly in it - I'm guessing the same beam cross section (say 30cm) at a kW (or a few) should be peachy.

I think you could hack one out of microwave oven, or two, or three. and satellite dish parts for less than $1000

[zac]

Someone apparently has made an inexpensive pocket sized version:

http://www.cbc.ca/news/canada/manitoba/new-5-device-easily-unlocks-car-doors-for-thieves-in-winnipeg-1.2288826

[solutions]

Is it EMP or is it merely a keycode sequence generator?

[CocaCola]

Is it EMP or is it merely a keycode sequence generator?

It was/is a mini EMP that was being imported for chump change from a few lucrative Asian electronics sites...  I tracked the device down when the initial news broke (on news agency had a screen shot that although edited out still contained enough for me to track it down) but that was months ago now...  It's really a crude exploit as it's far from reliable pretty much a hit and miss and get lucky exploit...

[zac]

I saw these on dhgate, but none were in the $5 range:

http://www.dhgate.com/wholesale/emp/s118.html

There are also quite a few models available on ebay, but none near $5:

http://www.ebay.com/itm/REMOTE-ELECTRO-MAGNETIC-PULSE-EMP-GENERATOR-MULTIFREQUENCY-CHINESE-CHINA-/181159490392?pt=LH_DefaultDomain_0&hash=item2a2df27358

Note the number sold:

http://www.ebay.com/itm/REMOTE-ELECTRO-MAGNETIC-PULSE-EMP-GENERATOR-MULTIFREQUENCY-CHINESE-CHINA-/181159490392?pt=LH_DefaultDomain_0&hash=item2a2df27358

[solutions]

Pretty robust spiral antennas used by those master craftsmen....

Would be neat if someone reverse engineered these to see what makes them tick

[LithiumOverdosE]

Perhaps they use some kind of small pulse forming network or even just generator of strong transients. My guess is that a wideband signal could be generated with sudden capacitive discharge or something similar.

Take a look at this powerful wideband generator that was historically used for medical purposes. http://youtu.be/BkpryjXYtZg The device seems to use a series of split ring resonators as active/passive radiating elements and the action appears to be primarily capacitive in nature but perhaps the same general idea could be used to generate. Let's say some kind of SMPS is used to charge capacitor to as high voltage as possible and then everything gets dumped into a very low inductance primary. Secondary would then generate sudden EM field transient. At least some of that will be radiated into its surroundings.

Its just an idea but perhaps some of it could be used. IIRC I saw that there were some IEEE papers available on the small pulse forming networks but I never investigated it.

[zac]

The photos show stacks of rechargeable lithium cells in them so they apparently use a high voltage (54V?) supply.