Universal Licensing System
WQDY331
CHICAGO TRANSIT AUTHORITY
License details
| ULS identifier | 2766406 |
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| Call sign | WQDY331 |
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| Radio service | PW |
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| Status | A |
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| Grant date | 2025-09-10 |
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| Expiration | 2035-11-29 |
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| Frequency range | 470.5375 - 473.6375 MHz (4 frequencies) |
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| Locations | 4 |
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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_LMpriv.zip |
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| Dataset refreshed | 2026-08-02 01:14:43 |
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Frequency assignments
| Location | Antenna | Station class | Assigned MHz | Upper MHz | Carrier MHz | Output W | ERP W | Altitude |
|---|
| 1 | 1 | FB2 | 470.53750000 | | | 75.000000 | 65.000000 | |
| 2 | 1 | FB2 | 470.53750000 | | | 90.000000 | 65.000000 | |
| 1 | 1 | FB2 | 470.63750000 | | | 75.000000 | 65.000000 | |
| 2 | 1 | FB2 | 470.63750000 | | | 90.000000 | 65.000000 | |
| 3 | 1 | MO | 473.53750000 | | | 5.000000 | 4.000000 | |
| 4 | 1 | MO | 473.53750000 | | | 5.000000 | 4.000000 | |
| 3 | 1 | MO | 473.63750000 | | | 5.000000 | 4.000000 | |
| 4 | 1 | MO | 473.63750000 | | | 5.000000 | 4.000000 | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 1 | 1 | 470.53750000 | | 20K0F3E |
| 2 | 1 | 470.53750000 | | 20K0F3E |
| 1 | 1 | 470.63750000 | | 20K0F3E |
| 2 | 1 | 470.63750000 | | 20K0F3E |
| 3 | 1 | 473.53750000 | | 20K0F3E |
| 4 | 1 | 473.53750000 | | 20K0F3E |
| 3 | 1 | 473.63750000 | | 20K0F3E |
| 4 | 1 | 473.63750000 | | 20K0F3E |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 1 | T | 875 N MICHIGAN AVE, CHICAGO, COOK, IL | 41.89891667, -87.62311111 | 180.000 m | BANT | 330.000 m structure / 333.000 m overall | |
| 2 | T | 200 E RANDOLPH ST, CHICAGO, COOK, IL | 41.88558333, -87.62088889 | 180.000 m | BANT | 337.000 m structure / 342.000 m overall | |
| 3 | T | | | | | | |
| 4 | T | | | | | | |
Antennas
| Location | Antenna | Type | Make / model | Height | Polarization | Gain dB | Azimuth | Radiation center | Maximum EIRP W |
|---|
| 1 | 1 | | | 333.000 m | | | | 332.100 | |
| 1 | 2 | | | 342.000 m | | | | 341.600 | |
| 1 | 3 | | | | | | | | |
| 1 | 4 | | | | | | | | |
Control points
| Number | Address | County | Phone |
|---|
| 1 | 120 N RACINE AVE, CHICAGO, IL | COOK | 3124328040 |
License history
| Date | File or call sign | Action |
|---|
| 2025-09-10 | WQDY331 | LIREN |
| 2025-09-08 | WQDY331 | LETRES |
| 2025-07-02 | WQDY331 | LIAUA |
| 2019-02-27 | WQDY331 | LIAUA |
| 2015-10-14 | WQDY331 | LIREN |
| 2015-10-13 | WQDY331 | ESUAPR |
| 2015-09-30 | WQDY331 | ESURNW |
| 2015-09-14 | WQDY331 | LETRES |
| 2015-08-31 | WQDY331 | ESURNW |
| 2007-02-27 | WQDY331 | LIAUA |
| 2007-02-26 | WQDY331 | ESUAPR |
| 2007-02-24 | WQDY331 | LIAUA |
| 2007-02-23 | WQDY331 | ESUAPR |
| 2006-11-14 | WQDY331 | LIAUA |
| 2006-11-13 | WQDY331 | ESUAPR |
| 2006-08-28 | WQDY331 | LETCNS |
| 2005-11-29 | WQDY331 | LIISS |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 2766406 | 2026-08-02 01:14:43 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
|---|
| Call Sign | WQDY331 | ULS 2766406 | 2026-08-02 01:14:43 |
| Status | A | ULS 2766406 | 2026-08-02 01:14:43 |
| Service | PW | ULS 2766406 | 2026-08-02 01:14:43 |
| Grant Date | 2025-09-10 | ULS 2766406 | 2026-08-02 01:14:43 |
| Expiration Date | 2035-11-29 | ULS 2766406 | 2026-08-02 01:14:43 |