▁at ▁the ▁N BC ▁Tower ▁in ▁the ▁city ' s ▁Stre eter ville ▁neighborhood , ▁while ▁the ▁transmit ter ▁res ides ▁at op ▁the ▁Will is ▁Tower . ▁Besides ▁a ▁standard ▁analog ▁transmission , ▁W LS ▁broadcast s ▁over ▁two ▁HD ▁Radio ▁channels , ▁and ▁is ▁available ▁online . ▁ ▁History ▁ ▁Early ▁years ▁The ▁American ▁Broadcast ing ▁Company , ▁own ers ▁of ▁Chicago ' s ▁ABC ▁Radio ▁Network ▁affili ate ▁W EN R ▁( 8 9 0 ▁AM ) — which ▁operated ▁in ▁a ▁time - share ▁arrangement ▁with ▁W LS ▁( 8 9 0 ▁AM ), ▁radio ▁adj unct ▁of ▁the ▁Pra irie ▁Far mer ▁and ▁itself ▁an ▁ABC ▁affili ate — launch ed ▁this ▁station ▁as ▁W EN R - FM ▁on ▁January ▁ 1 , ▁ 1 9 4 8 . ▁This ▁time - share ▁agreement ▁ended ▁on ▁February ▁ 1 9 5 4 , ▁when ▁ABC ' s ▁parent ▁company ▁American ▁Broadcast ing - Param ount ▁The at res ▁and ▁the ▁Pra irie ▁Far mer ▁merged ▁their ▁AM ▁stations ▁into ▁one , ▁W LS ▁becoming ▁the ▁surv iving ▁entity ▁and ▁joint ly ▁owned ▁by ▁both . ▁W EN R - FM ▁retained ▁its ▁call sign ▁but ▁began ▁sim ul cast ing ▁W LS ' s ▁programming , ▁later ▁adopt ing ▁its ▁own ▁separate ▁programming ▁formats ▁( which ▁included ▁classical ▁and ▁Broadway ▁theatre ▁show ▁t unes ) ▁for ▁part ▁of ▁the ▁day . ▁ABC ▁purchased ▁the ▁Pra irie ▁Far mer ▁in ▁November ▁ 1 9 5 9 , ▁giving