Universal Licensing System
WRDM706
Chelmsford, Town of Police Dept
License details
| ULS identifier | 4167567 |
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| Call sign | WRDM706 |
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| Radio service | MW |
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| Status | A |
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| Grant date | 2019-06-05 |
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| Expiration | 2029-06-05 |
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| Frequency range | 18025 - 18115 MHz (2 frequencies) |
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| Locations | 3 |
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| Representative location | Chelmsford, MIDDLESEX, MA |
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| Coordinates | 42.6315278, -71.4106111 |
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| Source archive | l_micro.zip |
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| Dataset refreshed | 2026-08-02 02:48:15 |
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Frequency assignments
| Location | Antenna | Station class | Assigned MHz | Upper MHz | Carrier MHz | Output W | ERP W | Altitude |
|---|
| 1 | 2 | FXO | 18025.00000000 | | | | | |
| 1 | 2 | FXO | 18025.00000000 | | | | | |
| 1 | 2 | FXO | 18025.00000000 | | | | | |
| 1 | 1 | FXO | 18115.00000000 | | | | | |
| 1 | 1 | FXO | 18115.00000000 | | | | | |
| 1 | 1 | FXO | 18115.00000000 | | | | | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 1 | 2 | 18025.00000000 | | 26M8D7W |
| 1 | 2 | 18025.00000000 | | 26M8D7W |
| 1 | 2 | 18025.00000000 | | 26M8D7W |
| 1 | 1 | 18115.00000000 | | 26M8D7W |
| 1 | 1 | 18115.00000000 | | 26M8D7W |
| 1 | 1 | 18115.00000000 | | 26M8D7W |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 1 | T | Doris Drive, Chelmsford, MIDDLESEX, MA | 42.63152778, -71.41061111 | 54.600 m | GTOWER | 45.700 m structure / 48.200 m overall | |
| 2 | R | | 42.62025000, -71.36783333 | 48.500 m | | | |
| 3 | R | | 42.60583333, -71.37650000 | 106.100 m | | | |
Antennas
| Location | Antenna | Type | Make / model | Height | Polarization | Gain dB | Azimuth | Radiation center | Maximum EIRP W |
|---|
| 1 | 1 | T | RADIO WAVES INC. HP2-18 | | V | 38.6000 | 109.6000 | | |
| 1 | 2 | R | RADIO WAVES INC. HP2-18 | | | 38.6000 | | | |
| 1 | 3 | R | RADIO WAVES INC. HP2-18 | | | 38.6000 | | | |
| 2 | 1 | T | RADIO WAVES INC. HP2-18 | | V | 38.6000 | 135.6000 | | |
License history
| Date | File or call sign | Action |
|---|
| 2020-09-12 | WRDM706 | LIAUA |
| 2020-09-09 | WRDM706 | LETCNS |
| 2019-06-05 | WRDM706 | LIISS |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 4167567 | 2026-08-02 02:48:15 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
|---|
| Call Sign | WRDM706 | ULS 4167567 | 2026-08-02 02:48:15 |
| Status | A | ULS 4167567 | 2026-08-02 02:48:15 |
| Service | MW | ULS 4167567 | 2026-08-02 02:48:15 |
| Grant Date | 2019-06-05 | ULS 4167567 | 2026-08-02 02:48:15 |
| Expiration Date | 2029-06-05 | ULS 4167567 | 2026-08-02 02:48:15 |