Here's an interesting and troubling report about FEMA and Dept. of Homeland Security rush efforts to place EMP-shielded Nautel 5 kW AM transmitter buildings...unconnected to towers...at various broadcast sites around the country.
They're apparently concerned about a repeat of a solar flare induced event which could take down significant portions of infrastructure. There was a massive solar flare in 1859 which fried the telecommunications facilities of its time...telegraph systems...causing fires and other damage.
Nautel hasn't made any tube transmitters yet, which of course, are MORE EMP resistant.
http://www.rbr.com/radio/homeland-security-installing-transmitters-nationwide.html
They're apparently concerned about a repeat of a solar flare induced event which could take down significant portions of infrastructure. There was a massive solar flare in 1859 which fried the telecommunications facilities of its time...telegraph systems...causing fires and other damage.
Nautel hasn't made any tube transmitters yet, which of course, are MORE EMP resistant.
http://www.rbr.com/radio/homeland-security-installing-transmitters-nationwide.html