Chronology of call letters KTBR

• Date: ...June 30, 1926-June 30, 1928...
• Frequency:
  • 1140 khz (...June 30, 1926...)
  • 1060 khz (...June 30, 1927...)
  • 1310 khz (...June 30, 1928...)
• Location:
  • Portland, Oregon (...June 30, 1926-June 30, 1928...)
• Owner of license:
  • Brown's Radio Shop (M. E. Brown) (...June 30, 1926...)
  • M. E. Brown (...June 30, 1927-June 30, 1928...) ( Note that this does not actually appear to represent a change in ownership.)