Universal Licensing System
WRBK639
STATE OF MARYLAND - DOIT
License details
| ULS identifier | 4033882 |
|---|
| Call sign | WRBK639 |
|---|
| Radio service | SY |
|---|
| Status | A |
|---|
| Grant date | 2018-04-12 |
|---|
| Expiration | 2028-04-12 |
|---|
| Frequency range | 769.26875 - 804.46875 MHz (12 frequencies) |
|---|
| Locations | 3 |
|---|
| Representative location | JEFFERSON, FREDERICK, MD |
|---|
| Coordinates | 39.3188889, -77.5304167 |
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| Source archive | l_LMpriv.zip |
|---|
| Dataset refreshed | 2026-08-02 01:24:11 |
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Frequency assignments
| Location | Antenna | Station class | Assigned MHz | Upper MHz | Carrier MHz | Output W | ERP W | Altitude |
|---|
| 1 | 1 | FB2 | 769.26875000 | | | 100.000000 | 499.000000 | |
| 1 | 1 | FB2 | 771.36875000 | | | 100.000000 | 499.000000 | |
| 1 | 1 | FB2 | 772.06875000 | | | 100.000000 | 499.000000 | |
| 1 | 1 | FB2 | 772.86875000 | | | 100.000000 | 499.000000 | |
| 1 | 1 | FB2 | 773.96875000 | | | 100.000000 | 499.000000 | |
| 1 | 1 | FB2 | 774.46875000 | | | 100.000000 | 499.000000 | |
| 2 | 1 | FX1 | 799.26875000 | | | 30.000000 | 200.000000 | |
| 3 | 1 | MO | 799.26875000 | | | 30.000000 | 100.000000 | |
| 2 | 1 | FX1 | 801.36875000 | | | 30.000000 | 200.000000 | |
| 3 | 1 | MO | 801.36875000 | | | 30.000000 | 100.000000 | |
| 2 | 1 | FX1 | 802.06875000 | | | 30.000000 | 200.000000 | |
| 3 | 1 | MO | 802.06875000 | | | 30.000000 | 100.000000 | |
| 2 | 1 | FX1 | 802.86875000 | | | 30.000000 | 200.000000 | |
| 3 | 1 | MO | 802.86875000 | | | 30.000000 | 100.000000 | |
| 2 | 1 | FX1 | 803.96875000 | | | 30.000000 | 200.000000 | |
| 3 | 1 | MO | 803.96875000 | | | 30.000000 | 100.000000 | |
| 2 | 1 | FX1 | 804.46875000 | | | 30.000000 | 200.000000 | |
| 3 | 1 | MO | 804.46875000 | | | 30.000000 | 100.000000 | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 1 | 1 | 769.26875000 | | 8K10F1E |
| 1 | 1 | 771.36875000 | | 8K10F1E |
| 1 | 1 | 772.06875000 | | 8K10F1E |
| 1 | 1 | 772.86875000 | | 8K10F1E |
| 1 | 1 | 773.96875000 | | 8K10F1E |
| 1 | 1 | 774.46875000 | | 8K10F1E |
| 2 | 1 | 799.26875000 | | 8K10F1E |
| 3 | 1 | 799.26875000 | | 8K10F1E |
| 2 | 1 | 801.36875000 | | 8K10F1E |
| 3 | 1 | 801.36875000 | | 8K10F1E |
| 2 | 1 | 802.06875000 | | 8K10F1E |
| 3 | 1 | 802.06875000 | | 8K10F1E |
| 2 | 1 | 802.86875000 | | 8K10F1E |
| 3 | 1 | 802.86875000 | | 8K10F1E |
| 2 | 1 | 803.96875000 | | 8K10F1E |
| 3 | 1 | 803.96875000 | | 8K10F1E |
| 2 | 1 | 804.46875000 | | 8K10F1E |
| 3 | 1 | 804.46875000 | | 8K10F1E |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 1 | T | 3108 MARLU RIDGE RD., JEFFERSON, FREDERICK, MD | 39.31888889, -77.53041667 | 322.500 m | LTOWER | 54.900 m structure / 54.900 m overall | |
| 2 | T | MD | | | | | |
| 3 | T | FREDERICK, MD | | | | | |
Antennas
| Location | Antenna | Type | Make / model | Height | Polarization | Gain dB | Azimuth | Radiation center | Maximum EIRP W |
|---|
| 1 | 1 | T | | 54.900 m | V | 9.5000 | 360.0000 | 247.100 | |
| 1 | 2 | T | | | | | | | |
| 1 | 3 | T | | | | | | | |
Control points
| Number | Address | County | Phone |
|---|
| 1 | 301 W PRESTON ST, SUITE 1304, BALTIMORE, MD | FREDERICK | 4435401786 |
License history
| Date | File or call sign | Action |
|---|
| 2020-09-12 | WRBK639 | LIAUA |
| 2019-06-11 | WRBK639 | LIAUA |
| 2019-05-22 | WRBK639 | PNLISR |
| 2019-05-22 | WRBK639 | LETTRS |
| 2019-02-16 | WRBK639 | LETCNS |
| 2018-04-12 | WRBK639 | LIISS |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 4033882 | 2026-08-02 01:24:11 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
|---|
| Call Sign | WRBK639 | ULS 4033882 | 2026-08-02 01:24:11 |
| Status | A | ULS 4033882 | 2026-08-02 01:24:11 |
| Service | SY | ULS 4033882 | 2026-08-02 01:24:11 |
| Grant Date | 2018-04-12 | ULS 4033882 | 2026-08-02 01:24:11 |
| Expiration Date | 2028-04-12 | ULS 4033882 | 2026-08-02 01:24:11 |