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 whet when turned on has been de de- The heart of this set Is a few bits bit of metal as big as a. match heads These are solid olid but they do the same same I work as intricate conventional radio ra ra- radio dio tubes Smaller sets seta seem possible But whether they will be the size of i wrist watches is not yet known The new set shown hown by the Bell Dell Telephone laboratories does not notI need to warm up before It plays It I neither lights nor glows nor produces any heat heal Less LeIS juice than a flashlight flashlight flash nash light runs It The set et still is under experiment and Is not soon to be on the market Bell Ben scientists who made mad it have haver r discovered a new principle of electronics electronics elec elec- and expect this principle to have many uses use In addition to radio i sets et In place of radio tubes the set uses little metal cylinders hollow pot Qt much III lir r U rUun rhan AD the metal tips of shoe hoe laivo a At the base 01 ot each Is fa set et a match-head match size lize bit of metal that does the new radio miracle This metal is one of the sort known as s semi That means the metal transmits electricity very poorly But the metal amplifies the current running into it if 11 1 the intake and output wires are attached to the little ball at the correct spacing This spacing pacing is about as u much as the thickness of a sheet of paper The wires are hair thin They and the bit of metal at the bottom are all the tube contains The electronic electronic electronic elec elec- action in the piece of metal causes no known wear The metal in this first set Is germanium Several Several Sev Sev- eral oral other metals have been used |