Universal Licensing System
WPRJ814
CRYSTAL SMR INC
License details
| ULS identifier | 1831747 |
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| Call sign | WPRJ814 |
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| Radio service | YG |
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| Status | A |
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| Grant date | 2025-09-04 |
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| Expiration | 2035-10-18 |
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| Frequency range | 489.9375 - 492.9375 MHz (2 frequencies) |
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| Locations | 2 |
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| Representative location | CLAYTON, CONTRA COSTA, CA |
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| Coordinates | 37.8817222, -121.9191111 |
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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 | FB8 | 489.93750000 | | | 60.000000 | 44.000000 | |
| 2 | 1 | MO8 | 492.93750000 | | | 25.000000 | 63.000000 | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 1 | 1 | 489.93750000 | | 20K0F3E |
| 1 | 1 | 489.93750000 | | 11K2F3E |
| 1 | 1 | 489.93750000 | | 4K00F1E |
| 1 | 1 | 489.93750000 | | 4K00F1D |
| 2 | 1 | 492.93750000 | | 4K00F1D |
| 2 | 1 | 492.93750000 | | 11K2F3E |
| 2 | 1 | 492.93750000 | | 20K0F3E |
| 2 | 1 | 492.93750000 | | 4K00F1E |
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 | | | | | | 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 | | | | | | | |
Control points
| Number | Address | County | Phone |
|---|
| 1 | 1601 NEPTUNE DR, SAN LEANDRO, CA | ALAMEDA | 5108959500 |
License history
| Date | File or call sign | Action |
|---|
| 2025-09-04 | WPRJ814 | LIREN |
| 2025-07-29 | WPRJ814 | LETRES |
| 2021-07-08 | WPRJ814 | LIMOD |
| 2015-09-26 | WPRJ814 | LIREN |
| 2015-07-27 | WPRJ814 | LETRES |
| 2013-01-01 | WPRJ814 | LTSAPR |
| 2013-01-01 | WPRJ814 | LIMOD |
| 2005-10-19 | WPRJ814 | LTSAPR |
| 2005-10-18 | WPRJ814 | LIREN |
| 2005-07-25 | WPRJ814 | LETRES |
| 2002-02-25 | WPRJ814 | AUDOPR |
| 2000-11-23 | WPRJ814 | LICCNV |
| 2000-10-18 | WPRJ814 | LIISS |
| 2000-10-18 | WPRJ814 | AUTHPR |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 1831747 | 2026-08-02 01:14:20 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
|---|
| Call Sign | WPRJ814 | ULS 1831747 | 2026-08-02 01:14:20 |
| Status | A | ULS 1831747 | 2026-08-02 01:14:20 |
| Service | YG | ULS 1831747 | 2026-08-02 01:14:20 |
| Grant Date | 2025-09-04 | ULS 1831747 | 2026-08-02 01:14:20 |
| Expiration Date | 2035-10-18 | ULS 1831747 | 2026-08-02 01:14:20 |