I would like to find a story about a man (maybe a farmer/rancher?) on trial for something I thought farm-related, which is live-televised to the world, who presents the plans for a homemade laser- or ray-gun in bits and pieces during the trial. Objections are raised to his information but he prevails and
by end of story he has given the full plans to the world, and influenced how humanity will continue with any one being the possessor of this deadly technology.
I was convinced this was Bradbury but cannot find it as such. I recall that it was in a collection of scifi short stories; would likely have read it 1978-1985 (but it could have been an older volume that I picked up then). Thanks for any help.