Universal Licensing System
KNO251
CRYSTAL SMR INC.
License details
| ULS identifier | 1636213 |
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| Call sign | KNO251 |
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| Radio service | YG |
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| Status | A |
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| Grant date | 2023-11-21 |
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| Expiration | 2033-12-02 |
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| Frequency range | 490.6375 - 493.6375 MHz (2 frequencies) |
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| Locations | 3 |
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| Representative location | Burlingame, SAN MATEO, CA |
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| Coordinates | 37.5426944, -122.4466389 |
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| Source archive | l_LMpriv.zip |
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| Dataset refreshed | 2026-08-02 01:14:20 |
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Frequency assignments
| Location | Antenna | Station class | Assigned MHz | Upper MHz | Carrier MHz | Output W | ERP W | Altitude |
|---|
| 1 | 1 | FB6 | 490.63750000 | | | 60.000000 | 45.000000 | |
| 2 | 1 | FB6 | 490.63750000 | | | 125.000000 | 80.000000 | |
| 3 | 1 | MO6 | 493.63750000 | | | 15.000000 | 63.000000 | |
| 4 | 1 | MO6 | 493.63750000 | | | 25.000000 | 63.000000 | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 1 | 1 | 490.63750000 | | 4K00F1E |
| 1 | 1 | 490.63750000 | | 11K0F3E |
| 1 | 1 | 490.63750000 | | 4K00F1D |
| 2 | 1 | 490.63750000 | | 11K0F3E |
| 2 | 1 | 490.63750000 | | 4K00F1D |
| 2 | 1 | 490.63750000 | | 4K00F1E |
| 3 | 1 | 493.63750000 | | 11K0F3E |
| 3 | 1 | 493.63750000 | | 4K00F1D |
| 3 | 1 | 493.63750000 | | 4K00F1E |
| 4 | 1 | 493.63750000 | | 11K0F3E |
| 4 | 1 | 493.63750000 | | 4K00F1E |
| 4 | 1 | 493.63750000 | | 4K00F1D |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 1 | T | Mt. Diablo State Park, top of Mt. Diablo (008501 / MT DIABLO CA), Clayton, CONTRA COSTA, CA | 37.88172222, -121.91911111 | 1097.600 m | LTOWER | 85.300 m structure / 91.400 m overall | N |
| 2 | T | 37Devil's Peak, Burlingame, SAN MATEO, CA | 37.54269444, -122.44663889 | 546.500 m | LTOWER | 37.000 m structure / 61.000 m overall | N |
| 3 | T | | | | | | N |
| 4 | T | | | | | | N |
Antennas
| Location | Antenna | Type | Make / model | Height | Polarization | Gain dB | Azimuth | Radiation center | Maximum EIRP W |
|---|
| 1 | 1 | T | | 73.000 m | | | | 942.000 | |
| 1 | 2 | T | | 61.000 m | | | | 504.000 | |
| 1 | 3 | | | | | | | | |
| 1 | 4 | | | | | | | | |
Control points
| Number | Address | County | Phone |
|---|
| 1 | 1601 Neptune Drive, San Leandro, CA | ALAMEDA | 5108959800 |
License history
| Date | File or call sign | Action |
|---|
| 2023-11-21 | KNO251 | LIREN |
| 2023-09-11 | KNO251 | LETRES |
| 2021-12-15 | KNO251 | LIMOD |
| 2013-11-23 | KNO251 | LIREN |
| 2013-09-09 | KNO251 | LETRES |
| 2013-01-01 | KNO251 | LIMOD |
| 2012-12-31 | KNO251 | LTSAPR |
| 2004-04-26 | KNO251 | LIREN |
| 2003-09-04 | KNO251 | LETRES |
| 2003-04-22 | KNO251 | AUDOPR |
| 2002-10-07 | KNO251 | LETCNS |
| 2002-01-04 | KNO251 | LIMOD |
| 2001-08-11 | KNO251 | LIASS |
| 2000-11-23 | KNO251 | LICCNV |
| 1998-09-29 | KNO251 | AUTHPR |
| 1998-09-29 | KNO251 | LIREN |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 1636213 | 2026-08-02 01:14:20 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
|---|
| Call Sign | KNO251 | ULS 1636213 | 2026-08-02 01:14:20 |
| Status | A | ULS 1636213 | 2026-08-02 01:14:20 |
| Service | YG | ULS 1636213 | 2026-08-02 01:14:20 |
| Grant Date | 2023-11-21 | ULS 1636213 | 2026-08-02 01:14:20 |
| Expiration Date | 2033-12-02 | ULS 1636213 | 2026-08-02 01:14:20 |