So far, no one had built a practical radio as small as a wristwatch.* But last week, a National Bureau of Standards physicist announced that scientists had come close. A tiny new "skeleton" set, no bigger than a pack of cigarets, could be hidden in the palm of one hand, said he.
The miniature set is a descendant of the famous proximity fusewhich was a complete transmitter-receiver in the nose of a 5-inch shell. Part of the secret is the dwarfish tubes, no bigger than lima beans. Part is the system of "wiring." Instead of the conventional radio's bulky tangle of wires,...
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