What's the name of this story...

Hi folk!

First, excuse me for my bad english. Now to the question. I read a story, sort of science fiction detective, when I was teenager, about 15 year ago. It was about scientist, who discovered method to deactivate nuclear arms all over the world by means of some special radio signal. He built device and remote control to it, and sent a letter to authorities of all nuclear power possessing countries. In letter he urged them to disarm all their nuclear weapons and gave them deadline at which he intented to activate his device. After that he just had to be on the run.