Universal Licensing System
KSR490
DURHAM SCHOOL SERVICES
License details
| ULS identifier | 1579856 |
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| Call sign | KSR490 |
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| Radio service | GJ |
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| Status | A |
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| Grant date | 2025-08-07 |
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| Expiration | 2035-09-06 |
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| Frequency range | 815.5375 - 860.5375 MHz (2 frequencies) |
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| Locations | 3 |
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| Representative location | CHICAGO, COOK, IL |
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| Coordinates | 41.8789167, -87.6361667 |
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| Source archive | l_LMpriv.zip |
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| Dataset refreshed | 2026-08-02 01:20:26 |
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Frequency assignments
| Location | Antenna | Station class | Assigned MHz | Upper MHz | Carrier MHz | Output W | ERP W | Altitude |
|---|
| 2 | 1 | FX1 | 815.53750000 | | | 25.000000 | 118.000000 | |
| 3 | 1 | MO | 815.53750000 | | | 25.000000 | 45.000000 | |
| 3 | 1 | MO | 815.53750000 | | | 4.000000 | 4.000000 | |
| 1 | 1 | FB2 | 860.53750000 | | | 125.000000 | 100.000000 | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 2 | 1 | 815.53750000 | | 20K0F3E |
| 3 | 1 | 815.53750000 | | 20K0F3E |
| 3 | 1 | 815.53750000 | | 20K0F3E |
| 1 | 1 | 860.53750000 | | 20K0F3E |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 1 | T | 233 S WACKER DR, CHICAGO, COOK, IL | 41.87891667, -87.63616667 | 181.000 m | B | 364.000 m structure | N |
| 2 | T | IL | | | | | |
| 3 | T | | | | | | |
Antennas
| Location | Antenna | Type | Make / model | Height | Polarization | Gain dB | Azimuth | Radiation center | Maximum EIRP W |
|---|
| 1 | 1 | T | | 367.000 m | | | | 180.000 | |
| 1 | 2 | T | | | | | | | |
| 1 | 3 | T | | | | | | | |
Control points
| Number | Address | County | Phone |
|---|
| 1 | 1528 EMERSON, EVANSTON, IL | COOK | 7088661998 |
License history
| Date | File or call sign | Action |
|---|
| 2025-08-07 | KSR490 | LIREN |
| 2025-07-14 | KSR490 | LITRAN |
| 2015-10-07 | KSR490 | LIREN |
| 2015-09-30 | KSR490 | ESUAPR |
| 2015-06-15 | KSR490 | LETRES |
| 2012-08-13 | KSR490 | ESUFNR |
| 2012-08-13 | KSR490 | EFUAPR |
| 2012-08-13 | KSR490 | EFUFNR |
| 2012-08-13 | KSR490 | ESUAPR |
| 2012-06-12 | KSR490 | LIAUA |
| 2012-06-11 | KSR490 | ESUAPR |
| 2012-05-24 | KSR490 | ESUFNR |
| 2009-04-09 | KSR490 | ESUFNR |
| 2006-05-10 | KSR490 | LIMOD |
| 2006-05-09 | KSR490 | COR |
| 2006-05-08 | KSR490 | ESUAPR |
| 2006-03-10 | KSR490 | ESUAPR |
| 2006-03-10 | KSR490 | LIMOD |
| 2005-10-06 | KSR490 | LIREN |
| 2005-10-03 | KSR490 | ESUAPR |
| 2005-06-13 | KSR490 | LETRES |
| 2005-04-21 | KSR490 | LIAUA |
| 2005-04-21 | KSR490 | LTSAPR |
| 2003-07-31 | KSR490 | LIAUA |
| 2000-11-22 | KSR490 | LICCNV |
| 2000-07-05 | KSR490 | LIREN |
| 2000-07-05 | KSR490 | AUTHPR |
| 2000-06-12 | KSR490 | LETRES |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 1579856 | 2026-08-02 01:20:26 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
|---|
| Call Sign | KSR490 | ULS 1579856 | 2026-08-02 01:20:26 |
| Status | A | ULS 1579856 | 2026-08-02 01:20:26 |
| Service | GJ | ULS 1579856 | 2026-08-02 01:20:26 |
| Grant Date | 2025-08-07 | ULS 1579856 | 2026-08-02 01:20:26 |
| Expiration Date | 2035-09-06 | ULS 1579856 | 2026-08-02 01:20:26 |