FM ▁ 9 9 . 1 ▁and ▁began ▁sim ul cast ing ▁the ▁stations . ▁ ▁They ▁also ▁began ▁using ▁similar ▁call sign s . ▁ ▁The ▁ 9 8 . 9   M Hz ▁frequency ▁in ▁San ▁Francisco ▁is ▁the ▁third ▁station ▁to ▁use ▁the ▁call sign ▁K S OL . ▁The ▁first ▁was ▁the ▁AM ▁rh ythm ▁and ▁bl ues ▁station ▁at ▁ 1 4 5 0   k Hz ▁( the ▁current ▁K E ST ). ▁The ▁second ▁was ▁a ▁popular ▁soul ▁music ▁station ▁at ▁ 1 0 7 . 7   M Hz ▁( now ▁known ▁as ▁K S AN ). ▁The ▁current ▁K S OL ▁is ▁un related ▁to ▁the ▁previous ▁two ▁stations . ▁ ▁See ▁also ▁K S AN ▁( FM ) ▁and ▁K E ST ▁ ▁The ▁station ▁at ▁ 9 9 . 1   M Hz ▁was , ▁for ▁many ▁years , ▁K L RS ▁(" Col ors "), ▁air ing ▁a ▁New ▁Age ▁music ▁format ▁target ing ▁Santa ▁Cruz ▁and ▁San ▁Jose . ▁The ▁station ▁was ▁eventually ▁purchased ▁Via com ▁ ▁The ▁two ▁stations ▁twe aked ▁K OF Y ' s ▁adult ▁album ▁alternative ▁format ▁and ▁adopted ▁the ▁call ▁letters ▁K DB K ▁( 9 8 . 9   M Hz ) ▁and ▁K DB Q ▁( 9 9 . 1   M Hz ) ▁- ▁" Double ▁ 9 9 " ▁in ▁July ▁ 1 9 9 0 . ▁ ▁" Star ▁FM " ▁arrived ▁on ▁the ▁two ▁frequencies ▁in ▁Spring ▁ 1