The Utica Shelby Emergency Communication Association is a group of over 150 hams from all over the Metro-Detroit area. This club is the largest and ... See more most active club in southeast Michigan. One of USECA's main claims to fame is our repeater system. Our repeater is known as the "friendliest repeater in town", and can be found on a call sign of K8UO 147.180 MHz, and can be accessed by use of a 100 Hz CTCSS tone.