I used V-Soft's signal strength database to ID the strongest stations. This helps when not all stations are in Chicago.
For medium and low strength stations, I used the FCC database for various queries:
for all stations within 100km of me, for instance, click here.
You can get radio coverage maps from the FCC, or more refined maps from Radio Locator that show how likely it is to pick up the station.
Antenna is the orientation of the dipole; so the note "east/west" means the wire is strung east/west and sensitive to signals coming from the north or south.
Station IDs were either heard, inferred from strength, music type, from the list of Chicago stations, or best guess from distant station lists.
Frequency Call sign Strength Antenna notes
87.7 WLFM-LP spanish news (tv carrier)
88.1 WCRX east/west dance mono
88.1 WSSD north/south R&B / announcer talking over song
88.5 WHPK-FM strong "very local, college"
88.9 WIIT weak east/west college
89.3 WKKC smooth music
89.7 WONU Christian
90.1 WMBI-FM strong Christian
90.5 WRTW? rap
90.7 WAUS weak classical
90.9 WDCB north/south
91.1 WGSI weak focus on the family / fox news / faint music
91.5 WBEZ strong
91.9 WJCH piano music
92.3 WPWX rap
92.5 clear (trace)
93.3 clear (trace) north/south
93.5 WVIX spanish
93.9 WLIT-FM talk
93.7 WTRX-FM or WBCT north/south country
94.1 clear (trace)
94.3 WJKL christian
94.7 WLS-FM rock
94.9 clear (trace)
95.5 WNUA jazz
95.7 clear (trace)
95.9 WEFM or WERV-FM east/west jazz
96.3 WBBM-FM rock?
97.3 WQBW? faint "Milwaukee, WI 104mi"
97.5 WHMS lite
97.9 WLUP-FM MISSING?
98.1 WIBN or WZOE north/south "seeger, classic hits radio online"
98.3 strong local CPU
98.7 WFMT classical
98.9 WBYR "fort wayne, IN ""The Bear"" 153mi range"
99.1 WXTT east/west "Extra rock Danville, IL 114mi"
99.5 WUSN country
99.9 WCPQ strong
100.3 WILV 70's
100.5 clear (trace)
100.7 W264BF east/west Christian
101.1 WKQX alt
101.5 WBCH? WBNQ? WNSN? modern WBCH? WBNQ? WNSN?
101.9 WTMX R&B
102.1 clear (trace)
102.3 WYCA east/west gospel
102.7 WVAZ love or Christian
102.9 clear (trace)
103.1 WVIV-FM spanish
103.5 WKSC-FM modern/dance
103.7 clear (trace)
103.9 WXRD east/west rock (political)
104.3 WJMK rock
104.5 clear (trace)
104.7 WCFL east/west christian
105.1 WOJO spanish
105.5 WJLE country
105.9 WCFS-FM country
106.3 WSRB hip-hop
106.7 WPPN spanish
106.9 WXXC Marion, Indiana!
107.1 WZVN rock
107.5 WGCI-FM hip-hop
107.9 WLEY-FM spanish
Since formatting is horrible, here is the Excel spreadsheet.
If a frequency is not listed, it was a channel subject to bad interference from a neighboring station.
The idea of finding the clear channels is to find one suitable for meteor scatter work: a normally too-distant station (because it is over the horizon) can suddenly boom in because the signal is reflected from a ionized meteor trail halfway between the listener and broadcaster.
Some interesting results: WXXC and WBYR, located in Marion and Fort Wayne, IN, at 150 miles away.