Show j BOMBERS BOMBERS' FRIEND Secrecy Lifted From Giant Jammer of German Radar BERKELEY Call Cat Cal Jan 23 UP An An Amerl American an electron gun which jammed German radar and screened the allies' allies huge bombing raids late In the war was waa unveiled for the first time Thursday The a six- six high foot-high frequency y tube that sprayed explosive bursts of electrons electrons electrons elec elec- and blanketed radar apparatus apparatus tua for miles was credited with much of the success of mass daylight air raids and possibly helped save savo the lives of hundreds of allied airmen Lifting wartime censorship the University Uni of California disclosed the details of oC the which was waa developed from an outmoded atom by two young electrical electrical electrical elec elec- engineers Dr D D. H. H Sloan and Dr L. L C C. C Marshall Started In 1938 Sloan and Marshall started experiments ex ex- the In 1938 By the spring of 1945 they had evolved a gun with which the allies were hurling more raw radio power Into the air than any other amplifier ever constructed The was capable of smothering all radio and radar frequencies between and megacycles s In a cone feet teet high miles s long and 15 miles wide With it the alies kept the enemy from learning in advance the he location and direction of the big air fleets fleets' th that t d devastated Germany Germany Germany Ger Ger- many In the closing months of the war This Initial advantage over the he Nazi defenses multiplied the Germans Germans' troubles and contributed Indirectly to speeding the end of the war The fires a concentrated concentrated concentrated concen concen- burst of electrons within a atall atall tall vacuum tube which explode with tremendous power pD The power powers is s broadcast to disrupt radio waves of ot any desired frequency High Efficiency Sloan and Marshall said the versatile versatile ver ver- tube Is the most powerful and efficient source of stable power jower amplification known It is the Jie only power amplifier which has achieved the same efficiency as a high frequency radio broadcasting broadcasting broadcasting broad broad- casting station about 80 Because of this the scientists said it has peacetime possibilities In n broadcasting television and F. F radio M.-radio for range long-range communications communications communications com com- and transmission of high frequency power power power-or or its original nal inal purpose as an atom Sloan who designed the worlds world's first volt X ray tube In 1933 also worked on the e army's army missiles guided program at Johns Hopkins university during the war Marshall served as the first director of ot the British branch of the radiation laboratory and later was waa chief of the operational re research research research re- re I search section In the P Pacific ocean area |