Salt Lake Telegram | 1929-12-29 | Page 77 | Anti-Noise Dive Seeks to Oust 'Man-Made Static,' Foe of Radio

Anti Noise Drive S Seeks eks to 10 Oust Man Made Static Foe of ur Radio By By C. C E E. E BUTTERFIELD Radio Radi Editor Associated Press Prest Fa Feature re Service CHICAGO Dec 28 8 8 AP When AP-When When I mall man inami h de d tho the light t. t socket ocl et ct re- re r cr colver ho hI took took- upon himself the solution notation of at ofa a real of his mia 1111 own making It Itla Ula Is the tho conquering of ot manmade manmade man made static While m man n lias not m made ue tUC S progress ogress in th the drive against at atmospheric at- at static h he thinks he can Jn m plaster master ster something he lIe has haa created himself i static staLk considerably different in int tempo t from that generated generated gen gen- r-r r led In the tho air g gets pets Its ts Its name sante from font the clicks cHek the tho cr crashes l hes and tho the miscellaneous neo s noises and other dl disturbances t produced by motors warming pads pad electric Ice Ico boxes lI light ht automatic telephones t dor or bells l and and- fifty ah and ono erie other short electric rt cuts cutis to labor Jabor saving Probably th the gr greatest offender I Is I. the tho motor which takes many manx guises guises' in houll household Jold appliances appliance Itis It ItIs ItIs Is used too tor lye cit vacuum cleaners washing u machines 1 ice Io 0 boxes oil heaters anti and what Most Moet of the thc trouble bouble comes s from sparking brushes whose blue discharge reg ister v Ja the receiver n ni as s n a neon con continuous serIes aeries of t h clicks An Any electric that sparks wherever a a. contact Is made such stick h. h as aN tho the turning on and arid off oU of or a B. light ht I completes the tho list Hat Naturally with the AC receiver er connected onn directly to the liou house e lighting circuit tu dis-tu disturbances b nc 9 wi will register easier casler than battery bat battery r 1 with tho the I tery tory set let Not ot only arp up clicks cUcka and I crashes that t develop within tho the house translated Into sound but similar Interference will come from outside o sources source Even Kven automobiles with faulty ignition systems will register na as they p pass S tho the house l Engineers n have havo tackled thie hem Jem by d developing electric filters In tho thin Leslie I F. F Muter laboratories as as s well wen as na elsewhere two types ty s of ot r n o. o eliminators havo beet been tried out Ono Quo eon consists ls s of two h duty duly with th the ct center t r point grounded to be bo Con Connected connected con con- a across ro 3 the Uno furnishing power to the tile re receiver Another contains captains choke colls coHa in addition to the condensers to give g gr greater t r tittering filtering action Its Its purpose Is Isto to tb block Interference from flom motors mo- mo p tors tOrA and tho the hile and is placed either cither In th the set act power ower line lino or connected con con- d to tho the apparatus causing the tile trouble Such d devices are aro de designed to coy at l 90 10 p per r cent atthe of at the disturbances However tho the fil filtering ill n action is Is' not complete although al al' although though te tS In the this a average era o household house house- kohl hold show thorn them to be bo of v value lue In m and muffling nd reducing nol noire As 5 more mote of ot the tile novelty of oC owning a receiver lecel without batteries to toto to fool fool- l' l with wears oft off the listener r probably will d demand mand free click re re re- It IP will then up to the set manufacturer manuC to to consider the insertion of DC a n. noise filter just just as Ins Ins' Important In lit set design designas as tho cir clr- cult itself