Universal Licensing System
WRDU876
Chicago Public Media, Inc.
License details
| ULS identifier | 4183092 |
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| Call sign | WRDU876 |
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| Radio service | MG |
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| Status | A |
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| Grant date | 2019-07-25 |
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| Expiration | 2029-07-25 |
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| Frequency range | 21675 MHz |
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| Locations | 2 |
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| Representative location | CHICAGO, COOK, IL |
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| Coordinates | 41.8989167, -87.6231111 |
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| Source archive | l_micro.zip |
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| Dataset refreshed | 2026-08-02 02:45:12 |
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Frequency assignments
| Location | Antenna | Station class | Assigned MHz | Upper MHz | Carrier MHz | Output W | ERP W | Altitude |
|---|
| 1 | 1 | FXO | 21675.00000000 | | | | | |
| 1 | 1 | FXO | 21675.00000000 | | | | | |
| 1 | 1 | FXO | 21675.00000000 | | | | | |
| 1 | 1 | FXO | 21675.00000000 | | | | | |
| 1 | 1 | FXO | 21675.00000000 | | | | | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 1 | 1 | 21675.00000000 | | 50M0D1W |
| 1 | 1 | 21675.00000000 | | 50M0D1W |
| 1 | 1 | 21675.00000000 | | 50M0D1W |
| 1 | 1 | 21675.00000000 | | 50M0D1W |
| 1 | 1 | 21675.00000000 | | 50M0D1W |
| 1 | 1 | 21675.00000000 | | 50M0D1W |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 1 | T | WEST TOWER 875 N MICHIGAN AVE (280283), CHICAGO, COOK, IL | 41.89891667, -87.62311111 | 180.700 m | BTWR | 337.400 m structure / 425.200 m overall | |
| 2 | R | | 41.89180556, -87.60458333 | 185.800 m | | | |
Antennas
| Location | Antenna | Type | Make / model | Height | Polarization | Gain dB | Azimuth | Radiation center | Maximum EIRP W |
|---|
| 1 | 1 | T | CommScope VHLP2-23 | | V | 40.5000 | 117.2000 | | |
| 1 | 2 | R | CommScope VHLP2-23 | | | 40.5000 | | | |
License history
| Date | File or call sign | Action |
|---|
| 2020-10-27 | WRDU876 | LETCNS |
| 2019-07-25 | WRDU876 | LIISS |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 4183092 | 2026-08-02 02:45:12 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
|---|
| Call Sign | WRDU876 | ULS 4183092 | 2026-08-02 02:45:12 |
| Status | A | ULS 4183092 | 2026-08-02 02:45:12 |
| Service | MG | ULS 4183092 | 2026-08-02 02:45:12 |
| Grant Date | 2019-07-25 | ULS 4183092 | 2026-08-02 02:45:12 |
| Expiration Date | 2029-07-25 | ULS 4183092 | 2026-08-02 02:45:12 |