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#269159 - 04/17/14 05:11 AM Re: Keep incandescents as a backup [Re: benjammin]
Russ Offline
Geezer

Registered: 06/02/06
Posts: 5357
Loc: SOCAL
IIRC most of the energy in a nuc weapon derived EMP is in HF to low VHF radio spectrum, The EMP is captured and concentrated in long wire antennas such as power lines. I am not very concerned about LED flashlights being knocked out by an EMP. Anything powered through a wall outlet however...

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#269162 - 04/17/14 11:55 AM Re: Keep incandescents as a backup [Re: PSM]
Byrd_Huntr Offline
Old Hand

Registered: 01/28/10
Posts: 1174
Loc: MN, Land O' Lakes & Rivers ...
You got that right PSM! When I was a teenage driver with a junker mobile, an old wool blanket and a strategically placed 100 watt bulb under the hood kept me mobile in the wintertime.
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The man got the powr but the byrd got the wyng

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#269169 - 04/17/14 03:12 PM Re: Keep incandescents as a backup [Re: Russ]
adam2 Offline
Addict

Registered: 05/23/08
Posts: 474
Loc: Somerset UK
Originally Posted By: Russ
IIRC most of the energy in a nuc weapon derived EMP is in HF to low VHF radio spectrum, The EMP is captured and concentrated in long wire antennas such as power lines. I am not very concerned about LED flashlights being knocked out by an EMP. Anything powered through a wall outlet however...


Agree, I suspect that an LED flashlight would survive an EMP event.
I would however still urge that incandescents be stored just in case, and do not forget some low powered flashlight bulbs for extending battery life.

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#269173 - 04/17/14 05:09 PM Re: Keep incandescents as a backup [Re: adam2]
Am_Fear_Liath_Mor Offline
Carpal Tunnel

Registered: 08/03/07
Posts: 3078


Quote:
Agree, I suspect that an LED flashlight would survive an EMP event.


But just to make sure during a HEMP E1 nanosecond pulse, these might help

http://techprotectbag.com/

to protect those valuable electronics such as SW radios/Funcubes/GPS/notebooks/cameras/watches etc including LED flashlights/Bulbs

then place in a good quality sealed Aluminium Breif Case Aluminium Brief Case.

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#269174 - 04/17/14 05:12 PM Re: Keep incandescents as a backup [Re: Am_Fear_Liath_Mor]
Tarzan Offline
Member

Registered: 02/02/08
Posts: 146
Loc: Washington
Forgive me my ignorance, but if a faraday cage is a metal box, is my vehicles trunk adequate or do I need to research the matter more thoroughly? I ask this question for the benefit of others as well as my own stupid self

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#269178 - 04/17/14 05:31 PM Re: Keep incandescents as a backup [Re: Tarzan]
Am_Fear_Liath_Mor Offline
Carpal Tunnel

Registered: 08/03/07
Posts: 3078

Quote:
Forgive me my ignorance, but if a faraday cage is a metal box, is my vehicles trunk adequate or do I need to research the matter more thoroughly? I ask this question for the benefit of others as well as my own stupid self


The Vehicle trunk will make for a Faraday cage but a electronic leaky one for the higher speed pulse effects such as intense X-ray induced Crompton electron cascade from a High altitude nuclear EMP (HEMP). It will be perfectly OK for the natural EMP such as SME's interaction with the earths magnetosphere and geomagnetic effects, which changes the impedance from the Power station Source to the distributed loads to induce high currents in long line transmission lines.

https://en.wikipedia.org/wiki/Nuclear_electromagnetic_pulse

This may have even happened yesterday as 1/3 of the Scottish main land electricity supply failed to a cascading failure.

http://www.bbc.co.uk/news/uk-scotland-27058766

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#269405 - 04/24/14 06:34 PM Re: Keep incandescents as a backup [Re: Tarzan]
DesertFox Offline
Enthusiast

Registered: 01/04/07
Posts: 339
Loc: New York, NY
In that vein, how about the mylar bags that electronics are sometimes shipped in? I have some laying around. Would they offer any protection at all for radios and other electronics?

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#269406 - 04/24/14 07:07 PM Re: Keep incandescents as a backup [Re: wileycoyote]
ireckon Offline
Pooh-Bah

Registered: 04/01/10
Posts: 1629
Loc: Northern California
Originally Posted By: wileycoyote
generally candles aren't cheap


I was going to say tea lights are cheap, but they aren't that cheap anymore.

I bought these in bulk 10 years ago for about $2 per 50. I guess I'm sitting on a small fortune. lol

http://www.walmart.com/ip/Light-In-the-Dark-Unscented-Tealight-Candles/22697463
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#269407 - 04/24/14 07:38 PM Re: Keep incandescents as a backup [Re: ireckon]
wileycoyote Offline
Enthusiast

Registered: 03/01/11
Posts: 309
Loc: north central west TX
Originally Posted By: ireckon
Originally Posted By: wileycoyote
generally candles aren't cheap


I was going to say tea lights are cheap, but they aren't that cheap anymore.

I bought these in bulk 10 years ago for about $2 per 50. I guess I'm sitting on a small fortune. lol

http://www.walmart.com/ip/Light-In-the-Dark-Unscented-Tealight-Candles/22697463



even at 10-20 cents each, they're still a heck of a deal.

we found tea candle only useful for slightly illuminating the darkness, but weren't worth much as task lights, like reading/cooking. they start off bright for a minute or two but once the pool of wax forms around the burnt-down wick, its more like moonglow.

better than nothing, and in an emergency like a black-out they do help keep fears at bay.

thnx for the comment (and reminder), ireckon.

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#269408 - 04/24/14 09:40 PM Re: Keep incandescents as a backup [Re: wileycoyote]
ireckon Offline
Pooh-Bah

Registered: 04/01/10
Posts: 1629
Loc: Northern California
My wife just told me those tea lights are $2.25 for 50 in the store at Walmart. That's 4.5 cents per candle, and even less if you buy a bigger bag. I don't know why the online price is so much higher.
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