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Protecting against EMF bomb

R

rr

Jan 1, 1970
0
Hi,

How would one protect certain items against any type of EMF attack, either
an EMF weapon or residual from a nuke.

not big items, but a radio, small solar panel, vehicle electonics etc.

can they be stored underground in some type of container.

thks
]
 
K

krw

Jan 1, 1970
0
Hi,

How would one protect certain items against any type of EMF attack, either
an EMF weapon or residual from a nuke.

not big items, but a radio, small solar panel, vehicle electonics etc.

can they be stored underground in some type of container.

Sure, in metal cans (or under tin-foil hats).
 
D

Don Kelly

Jan 1, 1970
0
----------------------------
rr said:
Hi,

How would one protect certain items against any type of EMF attack, either
an EMF weapon or residual from a nuke.

not big items, but a radio, small solar panel, vehicle electonics etc.

can they be stored underground in some type of container.

thks
]
Unplug it if you are worried.
 
B

Beachcomber

Jan 1, 1970
0
Sure, in metal cans (or under tin-foil hats).
I once worked at a commecial radio transmitter were they concerned
about this stuff during the 60's. Many stations even received
government funds for this if they happened to operate on the
designated 'hardened' frequencies.

The general idea was heavy duty surge arrestors everywhere (similar to
lighting arrestors), generous spacing between components, and putting
critical electronics in a more-or-less sealed up copper 'Faraday
Cages' with surge protection on every incoming and outgoing line.
Sometimes entire rooms were lined with copper. Also, lots of stuff
was de-rated (i.e. using 1 or 2 watt resistors when 1/4 watt was
called for in the circuit design, humongous over-rated power
capacitors, etc.).

Every one of these stations had an emergency AM radio with the old CD
triangle logo over what were called the Conelrad Frequencies.
 
J

JohnR66

Jan 1, 1970
0
krw said:
Not true. Disconnected devices are still sensitive to high EMF
fields.

Quite true. Ever put something in a microwave?
 
B

bud--

Jan 1, 1970
0
rr said:
Hi,

How would one protect certain items against any type of EMF attack, either
an EMF weapon or residual from a nuke.

not big items, but a radio, small solar panel, vehicle electonics etc.

can they be stored underground in some type of container.

Should be (nuclear-)EMP attack?

Buying a car with an ignition coil operated by points (non-electronic)
and a vacuum tube radio (and nothing else electronic) would help. Or a
bicycle.
 
C

Chris

Jan 1, 1970
0
Hi,

How would one protect certain items against any type of EMF attack,
either an EMF weapon or residual from a nuke.

not big items, but a radio, small solar panel, vehicle electonics etc.

can they be stored underground in some type of container.

thks
]

best way is to have them turned off.
 
R

rr

Jan 1, 1970
0
thks, you sounded like you know what you are speaking about.

whats the point of having a hand crank radio for use in emergency, if one of
those emergencies might be
and EMF event.

this is strickly to store emergency equipment.



Benj said:
My understanding is that electrical equipment that is not "live" at
the time of the EMF attack would not be affected. It would be wise to
have any necessary batteries disconnected. Burying the items would
serve no purpose, other than security.

The way to protect gear that is not running is to place it inside a
sealed metal box (aluminum, copper, ect. The more conductive the
better) Note that the lid needs to be REALLY electrically sealed!
Usually RF "fingers" or Steel wool "O" rings are used to make contact
all around the lid. A simple wire to the lid just won't do it. For
small items, [Pack of CDs, DVDs, etc.] new empty paint cans are
perfect! Hey for fun put an old useless CD in your microwave! Great
way to get rid of your old "secret" files. Microwave might not be too
happy with the load, though.

However, any power cord (plus all wires in house and out to power
transformer) makes an antenna for the EMP as does any actual antenna.
IF the gear is to be operational at the time you must set it up as you
would to protect from lightning. Arrestors, grounds etc. Unplugging
power cords and antennas helps save gear because it disconnects the
"antennas" that pick up the damaging EMI.
 
D

Don Kelly

Jan 1, 1970
0
Benj said:
My understanding is that electrical equipment that is not "live" at
the time of the EMF attack would not be affected. It would be wise to
have any necessary batteries disconnected. Burying the items would
serve no purpose, other than security.

The way to protect gear that is not running is to place it inside a
sealed metal box (aluminum, copper, ect. The more conductive the
better) Note that the lid needs to be REALLY electrically sealed!
Usually RF "fingers" or Steel wool "O" rings are used to make contact
all around the lid. A simple wire to the lid just won't do it. For
small items, [Pack of CDs, DVDs, etc.] new empty paint cans are
perfect! Hey for fun put an old useless CD in your microwave! Great
way to get rid of your old "secret" files. Microwave might not be too
happy with the load, though.

However, any power cord (plus all wires in house and out to power
transformer) makes an antenna for the EMP as does any actual antenna.
IF the gear is to be operational at the time you must set it up as you
would to protect from lightning. Arrestors, grounds etc. Unplugging
power cords and antennas helps save gear because it disconnects the
"antennas" that pick up the damaging EMI.

Good answer.
[/QUOTE]
 
G

G \Guglielmo\ Evans G4SDW

Jan 1, 1970
0
Wilscombe said:
Just a few general comments on Survival situations:
1) If things really go to the wall, listen out twenty minutes before
and twenty minutes after 12 noon. Rationale: A stick in the ground
will give you midday and it conserves batteries (And cells!).

The essence of the "mean" in "Greenwich Mean Time" is that it is
an averaging process. The Sun is only directly overhead on
two days per year (ISTR one of which is 25th of Dec, important
to some religionists).

At other times ISTR that the difference between Noon GMT
and the Sun being directly overhead can be as much as 40 mins.

Some old-time clocks had an extra dial to show this variation
and were known as "Equation Of Time" clocks.

Google on "analemma"
 
J

JohnR66

Jan 1, 1970
0
Benj said:
My understanding is that electrical equipment that is not "live" at
the time of the EMF attack would not be affected. It would be wise to
have any necessary batteries disconnected. Burying the items would
serve no purpose, other than security.

The way to protect gear that is not running is to place it inside a
sealed metal box (aluminum, copper, ect. The more conductive the
better) Note that the lid needs to be REALLY electrically sealed!
Usually RF "fingers" or Steel wool "O" rings are used to make contact
all around the lid. A simple wire to the lid just won't do it. For
small items, [Pack of CDs, DVDs, etc.] new empty paint cans are
perfect! Hey for fun put an old useless CD in your microwave! Great
way to get rid of your old "secret" files. Microwave might not be too
happy with the load, though.

However, any power cord (plus all wires in house and out to power
transformer) makes an antenna for the EMP as does any actual antenna.
IF the gear is to be operational at the time you must set it up as you
would to protect from lightning. Arrestors, grounds etc. Unplugging
power cords and antennas helps save gear because it disconnects the
"antennas" that pick up the damaging EMI.
Just how powerfull are these EMP devices? How close do these have to be
detonated? It takes a really close stroke of lightning to do damage to
electronics. We had lightning strike the electric pole where the transformer
feeds our house. The conducted/induced current damaged about half the
electrical items in the house from the well pump motor to answering
machines. Oddly, the computer and its modem were not harmed.
John
 
B

Beachcomber

Jan 1, 1970
0
Benj said:
My understanding is that electrical equipment that is not "live" at
the time of the EMF attack would not be affected. It would be wise to
have any necessary batteries disconnected. Burying the items would
serve no purpose, other than security.

The way to protect gear that is not running is to place it inside a
sealed metal box (aluminum, copper, ect. The more conductive the
better) Note that the lid needs to be REALLY electrically sealed!
Usually RF "fingers" or Steel wool "O" rings are used to make contact
all around the lid. A simple wire to the lid just won't do it. For
small items, [Pack of CDs, DVDs, etc.] new empty paint cans are
perfect! Hey for fun put an old useless CD in your microwave! Great
way to get rid of your old "secret" files. Microwave might not be too
happy with the load, though.

However, any power cord (plus all wires in house and out to power
transformer) makes an antenna for the EMP as does any actual antenna.
IF the gear is to be operational at the time you must set it up as you
would to protect from lightning. Arrestors, grounds etc. Unplugging
power cords and antennas helps save gear because it disconnects the
"antennas" that pick up the damaging EMI.
Just how powerfull are these EMP devices? How close do these have to be
detonated? It takes a really close stroke of lightning to do damage to
electronics. We had lightning strike the electric pole where the transformer
feeds our house. The conducted/induced current damaged about half the
electrical items in the house from the well pump motor to answering
machines. Oddly, the computer and its modem were not harmed.
John

Few have witnessed the violence of a 50 Megaton nuclear weapon going
off. During the late 1950's, atmospheric tests of this magnitude were
common and hence the concerns about an EMP pulse disabling all
defenses by blowing out all electronic systems in a wide area. The
theory suggests that a high altitude blast would do the most EMP
damage and shut the down non-hardened systems in an entire region.

Lighting damage, by contrast is strictly a local event. An indivdual
lightining bolt, though violent and potentially dangerous, is made of
of comparitively little power, when compared to thermonuclear weapons.
 
K

krw

Jan 1, 1970
0
Benj said:
Wilscombe wrote:
My understanding is that electrical equipment that is not "live" at
the time of the EMF attack would not be affected. It would be wise to
have any necessary batteries disconnected. Burying the items would
serve no purpose, other than security.

The way to protect gear that is not running is to place it inside a
sealed metal box (aluminum, copper, ect. The more conductive the
better) Note that the lid needs to be REALLY electrically sealed!
Usually RF "fingers" or Steel wool "O" rings are used to make contact
all around the lid. A simple wire to the lid just won't do it. For
small items, [Pack of CDs, DVDs, etc.] new empty paint cans are
perfect! Hey for fun put an old useless CD in your microwave! Great
way to get rid of your old "secret" files. Microwave might not be too
happy with the load, though.

However, any power cord (plus all wires in house and out to power
transformer) makes an antenna for the EMP as does any actual antenna.
IF the gear is to be operational at the time you must set it up as you
would to protect from lightning. Arrestors, grounds etc. Unplugging
power cords and antennas helps save gear because it disconnects the
"antennas" that pick up the damaging EMI.
Just how powerfull are these EMP devices? How close do these have to be
detonated? It takes a really close stroke of lightning to do damage to
electronics. We had lightning strike the electric pole where the transformer
feeds our house. The conducted/induced current damaged about half the
electrical items in the house from the well pump motor to answering
machines. Oddly, the computer and its modem were not harmed.
John

Few have witnessed the violence of a 50 Megaton nuclear weapon going
off. During the late 1950's, atmospheric tests of this magnitude were
common and hence the concerns about an EMP pulse disabling all
defenses by blowing out all electronic systems in a wide area. The
theory suggests that a high altitude blast would do the most EMP
damage and shut the down non-hardened systems in an entire region.

Yes, *VERY* few have witnessed 50MT nuclear weapons doing their thing
but far from being common, it was only done once (Tsar Bomba - 58MT),
by the USSR, and not in the '50s (October '61). Big nukes were
pretty much a thing of fiction.
 
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