Show give cure for static from smoke consumer many cases of radio interference are caused by electrical precipitators which are used to ti prevent smoke tind and noxious fumes or material from leaving a chimney radio engineers at the bureau of standards say th ahe precipitator operates by estabi i 1 bisbing a 11 lilg tily charged cli arged electric field inside the ch chimney linney of such a nature and clr particle panicles pa nicles S going coln 7 up the li linney are charged and driven against the llie null ivull where they stick culise interference the tha engineers explain bemuse because the high voltage then use used d Is obtained from a i redeller redl ree tiller ller which produces p sparks andi gen generates aerates radio frequency current as well as tile the direct current which the precipitators need if the precipitator Is so designed and arranged that the distance between the rectifier Is only a few feet or if the entire apparatus including all leads Is bloused in a metal building there Is usually ap no trouble but it the rectifier Is separated from the chimney the wire which joins forms forma an antenna which will radiate and cause interference for 20 miles or moro more interference luter terence from these eliminators can be eliminated the engineers declare by placing a grounded wire screed screen entirely around these wires and thoroughly grounding the wire screen and the rectifier fler if screening of the various parts Is 19 impracticable damping can be inserted at various points ln in the wire line will which cb will reduce the power radiated |