In January 2001, Big City Radio launched all-Dance formatted “Energy 92-7 & 5″ on a trio of signals in suburban Chicago. A year and a half later, Sierra H Broadcasting debuted the very similar “Energy 92-7 & 101-1″ on KAZL (eventually KNRJ) in Payson, AZ — with a simulcast on 10-watt K224CJ in Phoenix. With …