EMP ....Take the time to read a very good novel .. One Second After. Great reading.
Philip LaMarche LaMarche Enterprises, Inc [email protected] www.LaMarcheEnterprises.com 727-944-3226 727-937-8834 Fax 727-510-5038 Cell www.w9dvm.com K3 #1605 CCA 98-00827 CRA 1701 W9DVM -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of John Ragle Sent: Wednesday, April 27, 2011 12:10 PM To: Lee Buller; elecraft Subject: Re: [Elecraft] CME off reflector...not technical expert Lee... There is a vague similarity between a CME and what the weapons people call an EMP (electromagnetic pulse) weapon. The major difference is that we are somewhat protected from solar events by our atmosphere, although in the case of the one you refer to in the late 1800s, enough got through to create havoc. The worst aspect of an EMP or a very strong CME is that the particles involved directly damage the semiconductors in electronics...about the only thing you can do as protection from a really strong event is to put heavy shielding around the gear. Think lead sheet or tinfoil hats, etc. An EMP weapon will produce sudden, very intense electric fields (lots of photons) which will induce current flow in conductors, roasting them. A CME is usually composed of particles (e.g. protons) not photons, so in this case, think ion-implantation technology used for doping semiconductors, except the "dopant" is from the sun, not from a machine. In addition to the protons that come from the sun's envelope, there will be secondary junk from our atmosphere...the same things that produce the reds and greens (oxygen and nitrogen) in an aurora. If a CME comes along with an electromagnetic disturbance, the latter will arrive at the speed of light, i.e. rather promptly, while the particles (the MASS in CME) will come along later. In recent events, it has been 24-48 hours for that stuff to get here. John Ragle -- W1ZI ===== On 4/27/2011 11:44 AM, Lee Buller wrote: > I know there are a lot of very smart people on this reflector and > centuries of expertise and knowledge. So, that is why I have come > here to this "august" body of technical experts.... > > CME or Coronal Mass Ejection. I know that these can happen very > easily and now that the sun has become more active, I wonder what one > can do to protect their electronics from harm during one of these > events. I know the VHF guys would like to see these things ... but I > have read that these things can cause havoc to electronics. > > So...how does one protect their K3/K2 etc from such and event? ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
