Basically, what I am interested in doing is keeping my radio(s) up if possible should we be attacked by an EMP. I would like to be able to communicate. My thinking is that since detonation could be 30km or higher in the atmosphere, there would be no destructive force of the type we converntionally contemplate. If one were near ground zero of a blast, then that's that. However, in the event of survivability I would like to protect the devices from destruction from the pulse itself. So that's what I was contemplating. If I could save a hand-held, or protect a base station or mobile station through some pre-emptive effort then it would be worthwhile. These posts at least give me something to do re the most imminent threat, in my opinion. Thanks.