These 5 Hams are listed on pages 141-145 of Amateur Radio Stations of the U.S., July 1913
8DX, Harry T. Porter, 714 Main St., Conneaut, OH, 900 Watts
8DY, Donald F. Pancoast, 107 Prospect St., Ashtabula, OH, 1000 Watts
8DZ, Homer Williams, 29 Auburn Ave., Ashtabula, OH, 12 Watts
8EA, Clifford J. Mack, 49 McGovern Ave., Ashtabula, OH, 770 Watts
8EB, Robert S. Munsell, 191 Center St., Ashtabula, OH, 330 Watts
1913 Amateur Radio Stations PDF