Chronology of call letters KVOO

• Date: ...June 30, 1926-March 29, 1941...
• Previous call letters: KFRU ( Note: There is some controversy as to whether this station is actually a descendant station of the former KFRU. One source says that the license, frequency, and equipment of the former KFRU, Bristow, were transferred to Stephens College; another source claims that KVOO is a descendant station of the former KFRU.)
• Frequency:
  • 800 khz (...June 30, 1926...)
  • 860 khz (...June 30, 1927-June 30, 1928...)
  • 560 kHZ (...November 11, 1928
  • 1140 kHz (November 11, 1928-March 29, 1941)
  • 1170 kHz (March 29, 1941...)
• Location:
  • Bristow, Oklahoma (...June 30, 1926-June 30, 1928...)
  • Tulsa, Oklahoma (...November 11, 1928-March 29, 1941...) ( NOTE: listed as near Tulsa in Nov. 30, 1928 Radio Service Bulletin.)
• Owner of license:
  • Voice of Oklahoma Inc. (...June 30, 1926...)
  • Southwestern Sales Corporation (...June 30, 1927-January 1, 1933...)