Show t NEW ALKALI V VAPOR t TUBE AIDS RADIO NEW EW YORK Jan 12 Dy 12 By The ted Pre PreA Iresa Press A A new alkali vapor apor detector tube designed to Increase sensitiveness and dis- dis distance dis distance tance reception held tho the attention of delegates at the th convention of the Institute of ot radio engineers t Tuesday A paper about the tubo tube was ns read by Dr J IL It Dellinger chief or of the th radio laboratory of the United States bureau of stand stand- standards standards ards arda ards based on oil experiments car carried car car- carried ried ned on by Hugh Hueh A Brown Drown and Charles T Knipp ot or th the University University sit sity of or Illinois The rhe new tube Is described as a son soft ott tube tub with many of or the th characteristics of IL 11 t thard hard hord tube r Work Work ork h has 8 shown the paper c concluded that alkali vapor le- le detector de- de dee detector e elector tubes tubeR especially thos those containing cont con- con t taming the molecular alloy of c potassium and anil sodium are ar ideal Idea tubes for durability true to tone ton no reproduction reo reproduction re- re o production and non-critical non ad ad- ad c of or plate plat and filament filament- filament voltages |