RadioBanter - View Single Post - US TV Series that omit the existance of SW broadcasting or skywave MW radio listening: "Jericho" (currently running)...

Telamon · November 27th 06, 04:19 AM posted to rec.radio.shortwave

In article .com,
wrote:

Frank Dresser wrote:
"D Peter Maus" wrote in message
...

'
Actually, no it won't. Rolex uses a self winding mechanical
movement.

Even the good fakes use automatic movements.

Only the cheaper fakes would be harmed by EMP. And that's
questionable, given the steel case sheilding.

I wasn't aware of the show but I gather it's about what happens in
a small town after some sort of super-duper EMP pulse, more intense
than the Starfish prime test which couldn't even manage to burn out
mass quantities of early 60s germanium transistor radios.

Wow. An EMP pulse strong enough to destroy everything with a
circuit board, yet has no effect on everyone with a central nervous
system.

I think I'll stick with domestic shortwave radio for doomsday info.
It's every bit as misinformative as TV, but far more entertaining.

Frank and Telemon, I have great respect for your knowledge and the
accurate posts you both have made over the years.

EMP could be a nothing or a very real threat.

http://www.globalsecurity.org/wmd/library/report/1988/CM2.htm

While I dislike Wiki, in this case the data agrees with that I
gleaned from many open sources such as, but not limited to military
and telecomm. And it is in one easy to digest meal.

http://en.wikipedia.org/wiki/EMP_Pulse

I do know the US military is very concerned about EMP. I helped a
contractor install a radio relay and I was impressed by the, even by
my standards, fanatic steps taken to manage EMP. Double farrady cage,
every i/o line was either optical or had multi-stage polyphaser EMP
clamps. Much beyond what is required to survive mere lightning. I am
not revealing anything here that isn't already easy to find.

If there is interest I will post the links to some of the various
military manuals that go into way too much detail about the risks and
steps that SHALL be taken to mitigate EMP. This really belongs in a
survivial group more then this group.

I don't recall posting to this thread but my 2 cents would be that most
digital semiconductors are damaged by 1500V and greater due to
electrostatic protection. The number would be higher that that depending
on the circuits they are in. Low impedance circuits will need a higher
volts per meter to damaged them.

Generally devices that are not connected to cables will not get damaged
by EMP because the voltages developed will not be great enough to damage
the components so a radio not connected to power and an antenna would
not get damaged if they were in a metal case like the desk top radios I
own. Even plastic case radios without whip extended and not plugged into
a wall wart to the mains should be OK.

Radios connected to an antenna could have thousands of volts presented
to the the radio input and damaged it. Radios connected to the mains
could get damaged for the same reason. The EMP pulse will generate very
high voltage across a long conductor. If your radio is not not connected
to a long conductor of some sort then it should be OK.

Watches will keep working for sure. Modern car ignition systems will
probably keep working. First thing that would fail in a car would be the
radio.

--
Telamon
Ventura, California