[R-390] EMP

[Joe Foley]

The ugly thing about all of this is that we evidently have the capability of generating non-nuclear EMP's sufficient to cause lots of damage.

Hmm,..... I wonder who we've shared this technology with lately in the interest of peaceful coexistence.

Joe






--- On Fri, 9/25/09, Shoppa, Tim <tshoppa at wmata.com> wrote:

> From: Shoppa, Tim <tshoppa at wmata.com>
> Subject: Re: [R-390] EMP
> To: "Physicist" <physicist at cox.net>, "R-390 at mailman.qth.net" <R-390 at mailman.qth.net>
> Date: Friday, September 25, 2009, 8:18 AM
> KG4RZM writes:
> > Maybe we should build rebar faraday cages to store all
> of our R390A's...;)
> 
> The real gotcha in terms of EMP, is any sort of connection
> between long wires - be they power, anteanna, speaker,
> control, etc. - and the equipment.
> 
> Induced field in EMP is often measured in hundreds to tens
> of thousands volts per foot. The metal cabinet of any radio
> will be enough to shunt this field around vacuum tube
> electronics (I'm not guaranteeing anything about modern
> solid state stuff), but any wire hooked up to the electric
> grid or an antenna will have millions of volts across it and
> even our hollow-state 390A's won't deal with that well.
> 
> So the key is, a radio with no power, antenna, speaker,
> etc. cabling hooked up to it. A backup power source with
> similar containedness will be necessary after the EMP pulse
> too. I think that well designed solid state stuff following
> the simple "no cables" rule will have a good chance. But
> tube stuff in a metal cabinet will certainly survive.
> 
> Tim N3QE
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