[Milsurplus] Question about EMP

[Dick]

As I mentioned, LEMP's not a real issiue of the lightning event is at least 
a kilometer away.
NEMP, however, can still be a problem even of the nuclear events is too far 
away to cause
you any heat/blast/overpressure/radiation damage.  A high altitude nuclear 
detonation can
cause NEMP problems 1/2 way around the world from the blast location.

Dick

----- Original Message ----- 
From: jcoward5452 at aol.com
To: rertman at ix.netcom.com ; milsurplus at mailman.qth.net ; fpetri at eastex.net
Sent: 25 November, 2006 13:51
Subject: Re: [Milsurplus] Question about EMP


If it comes to NEMP I think the issue will be moot for those of us in
an urban setting,however the days of Mutually Assured Destruction are
over in my humble opinion.If there were a nuclear exchange, I beleve
the US would come through with minimal loss and the adversary would
cease to exist.We still maintain a formidable arsenal and no-one else
comes close.
  A 55 gal. drum with a good lid can hold a lot of smaller radio
sets,probably a complete GRC-9 with gas generator.Better yet sink a
concrete septic tank and seal up the input ant output holes and voila a
storage bunker.You could even water seal the concrete box before
putting in the ground.
 Jay

-----Original Message-----
From: rertman at ix.netcom.com
To: milsurplus at mailman.qth.net; fpetri at eastex.net
Sent: Sat, 25 Nov 2006 1:09 PM
Subject: Re: [Milsurplus] Question about EMP

Floyd:

Some MIL radios and other electronics are protected and some aren't. It
mostly depends on where they're intended to be used. If a radio's not
designed
to survive EMP, there's not a lot you can do to provide proper
protection
short of enclosing it in a grounded metal box that forms a good Faraday
cage.
But the antenna will still be a vulnerability path.

What kind of EMP do you want to protect against? There are two kinds:
LEMP - Lightning Electromagnetic Pulse
NEMP - Nuclear Electromagnetic Pulse

LEMP isn't really a problem if the radio's at least a kilometer from
the lightning event.
NEMP can be a problem even if the nuclear event is 1/2 way around the
world.

I spent a lot of my Lockheed EE career designing EMP protection into
airplanes and
associated electronics. I'll be happy to help you if you can provide
more detailed info
on what gear you want to protect and from what kind of EMP. I'm afraid
the NEMP
won't be piublicly available, though.

Dick

----- Original Message ----- From: Floyd Petri
To: GreenRadioTrade at yahoogroups.com
Cc: Army Radio Lists ; Military Surplus List
Sent: 25 November, 2006 02:03
Subject: [Milsurplus] Question about EMP

Are the modern military radios destroyed by EMP or are they protected?
I am
not refering to the ionization of the air, but the melting of the
germanium
in solid state components.

If they are destroyed how can they be hardened or protected to prevent
this?
Is there any kits for this? Are they available?

Floyd