Chronology of call letters WMH

First station

• Date: December 30, 1921-December 11, 1923
• Previous call letters: 8XB
• Frequency:
  • 619 khz (...April 1, 1922-January 3, 1922...) [concurrently with 833, see history page]
  • 833 khz (December 30, 1921-June 30, 1922...) [concurrently with 619, see history page]
  • 1210 khz (...June 30, 1923-December 11, 1923...)
• Location:
  • Cincinnati, Ohio (December 30, 1921-December 11, 1923)
• Owner of license:
  • Precision Equipment Co. (December 30, 1921-December 11, 1923)

Second station

• Date: May 22, 1924-March 1925
• Frequency:
  • 970 khz (...June 30, 1924...)
  • 920 khz (...February 1925-March 1925...)
• Location:
  • Cincinnati, Ohio (...June 30, 1924-March 1925...)
• Owner of license:
  • Ainsworth-Gates Radio Co. (May 22, 1924-March 1925...)
  • Kodel Radio Corp. (1925)
• Subsequent call letters: WKRC