Not wanting to encourage conspiracy theories, but hack in the 80's and
before DOD was working on an EMP weapon (short of an atomic explosion).
Wonder if your fishermen wandered into a test range? See
<http://en.wikipedia.org/wiki/Electromagnetic_pulse#Non-nuclear_electromagnetic_pulse_.28NNEMP.29>
73, Pete N4ZR
Check out the Reverse Beacon Network at
http://reversebeacon.net,
blog at reversebeacon.blogspot.com.
For spots, please go to your favorite
ARC V6 or VE7CC DX cluster node.
On 4/19/2015 3:44 PM, Hans Hammarquist via TowerTalk wrote:
This sounds very anecdotal. Yes, a near strike lightning may take out CB radios
etc but that it took out digital watches make me suspicious. The are usually
metal encapsulated and very immune to external field. I believe a EMP strong
enough to take out a watch also will take out the person carrying that watch.
Depending on the grid size, a Faraday cage is useful for the EM from a lightning as the
"M" will introduce back EMF in the cage which will neutralize the "M".
I hope the "falme" will not be too long,
Hans - N2JFS
-----Original Message-----
From: Patrick Greenlee <patrick_g@windstream.net>
To: towertalk <towertalk@contesting.com>
Sent: Sat, Apr 18, 2015 10:18 pm
Subject: Re: [TowerTalk] Near Field Lightning Damage
Back in the 80's a tuna boat pulled into San Diego with every device on
board
containing a semi-conductor inoperative. CB radio, Marine VHF,
SSB, SONAR,
RADAR, VHS tape player, SatNav LORAN, and on and on... All
the crew members
wore digital watches which were all totally dead.
One near miss by a large
lightning stroke took out everything with solid
state semiconductor junctions.
The good news was they didn't have a
spotter chopper aloft at the time
dependent on the aircraft beacon band
transmitter on board to find the boat
(helipad is the roof of the pilot
house.) We theorized it was the EMP that
ate everything as there was no
evidence that the bolt hit the boat.
Later
when asked what could be done to provide an immune backup comm
radio we told
them a mu metal box. A Faraday cage wouldn't stop the
magnetic pulse.
Just
a thought in case there are any serious preppers in our midst.
Patrick
NJ5G
_______________________________________________
_______________________________________________
TowerTalk
mailing
list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|