Show Researchers Develop Radio Which Uses No Vacuum Tubes NEW YORK YORK YORK-A A new scientific achievement a radio set with no vacuum tubes that plays instantly when turned on has been de de- de The heart of this set is a few bits of metal as big as match heads These are solid but they do the same work as intricate conventional radio radio radio ra ra- ra- ra dio tubes Smaller sets seem possible But whether they will be the size of wrist watches Is not yet known The new set shown by the Bell Telephone laboratories does not need to warm up before it plays It neither nor glows pot nor produces AnY eny heat heal Less juice than a flash flash- I I I rr light T t runs it The set still is under ml JIlt and is not soon to be on the market Bell scientists who made it have discovered a new principle of electronics electronics elec elec- and expect this principle to have many uses in addition to radio sets In place of radio tubes the set uses little metal cylinders hollow not much larger than the metal tips of shoe laces At the base of each is set a match head size bit of metal that does the new radio miracle This metal is one of the sort known as seir sent seITI That means the metal transmits electricity very poorly But the metal amplifies the current cUrlent running into it if the intake and output wires are attached to the little ball at the correct spacing This spacing is about as much as the thickness of a sheet of paper The wires are hair thin The They I and ml itoi t metal L t ate are air the tube contains The electronic electronic electronic elec elec- action h in the piece of metal causes no known wear The metal in this first set is germanium Several Sev Sev- Several eral other metals have been used |