Norman Krim, an electronics visionary who played a pivotal role in the industry’s transition from the bulky electron vacuum tube, which once lined the innards of radios and televisions, to the tiny, far more powerful transistor, died on Dec. 14 in a retirement home in Newton, Mass. He was 98. The cause was congestive heart failure, his son Robert said. Mr. Krim, who made several breakthroughs in a long career with the Raytheon Company and who had an early hand in the growth of the RadioShack chain, did not invent the transistor. (Three scientists did, in 1947, at Bell Laboratories.)...