First station[]
- Date: April 4, 1924-May 28, 1924 ( NOTE: one source gives start date as March 28, 1924.)
- Previous call letters: WJAZ
- Frequency:
- 810 khz (...June 30, 1925...)
- Location:
- Chicago, Illinois (April 4, 1924-May 28, 1924)
- Owner of license:
- Zenith Radio Corporation (April 4, 1924-May 28, 1924)
- Subsequent call letters: WEBH
Note: The second station was not a direct successor to the first, but the Chicago Tribune, owner of the second, had had agreements with Zenith (owner of the first) to supply broadcast material, and so there was, in fact, a connection.
Second station[]
- Date: May 31, 1924-March 29, 1941...
- Former call letters: WDAP
- Frequency:
- 810 khz (...March 1925-June 30, 1925...)
- 990 khz (...June 30, 1926...)
- 980 khz (...June 30, 1927...)
- 720 khz (...June 30, 1928-March 29, 1941...)
- Location:
- Chicago, Illinois (...March 1925-June 30, 1926...)
- Elgin, Illinois (...June 30, 1927-June 30, 1928...) ( Note: shown as "Elgin (Chicago), Illinois" in list dated June 30, 1928)
- Chicago, Illinois (...March 29, 1941...)
- Owner of license:
- Chicago Tribune (...March 1925...)
- The Tribune (Drake Hotel-Whitestone Co.) (...June 30, 1926...) ( Note that this does not actually appear to represent a change in ownership.)
- Chicago Tribune (...June 30, 1927...) ( Note that this does not actually appear to represent a change in ownership.)
- The Tribune Co. and Liberty Weekly Inc. (...June 30, 1928...) (See also WLIB; these were apparently in the process of being merged.)