Universal Licensing System
WQDU231
Cambridge Emergency Communications
License details
| ULS identifier | 2760051 |
|---|
| Call sign | WQDU231 |
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| Radio service | PA |
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| Status | E |
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| Grant date | 2005-10-31 |
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| Expiration | 2015-10-31 |
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| Cancellation | 2016-01-02 |
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| Frequency range | 4940 - 4990 MHz (2 frequencies) |
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| Locations | 2 |
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| Representative location | Cambridge, MIDDLESEX, MA |
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| Coordinates | 42.3775000, -71.1144444 |
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| Source archive | l_LMpriv.zip |
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| Dataset refreshed | 2026-08-02 01:25:43 |
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Frequency assignments
| Location | Antenna | Station class | Assigned MHz | Upper MHz | Carrier MHz | Output W | ERP W | Altitude |
|---|
| 1 | 1 | | 4940.00000000 | 4990.00000000 | | | | |
| 2 | 1 | | 4940.00000000 | 4990.00000000 | | | | |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 1 | T | Cambridge, MIDDLESEX, MA | 42.37750000, -71.11444444 | | | | |
| 2 | T | Cambridge, MIDDLESEX, MA | 42.37750000, -71.11444444 | | | | |
Antennas
| Location | Antenna | Type | Make / model | Height | Polarization | Gain dB | Azimuth | Radiation center | Maximum EIRP W |
|---|
| 1 | 1 | | | | | | | | |
| 1 | 2 | | | | | | | | |
Control points
| Number | Address | County | Phone |
|---|
| 1 | 489 Broadway, Cambridge, MA | MIDDLESEX | 6173496911 |
Special conditions
| Type | Condition code |
|---|
| P | 1035 |
| P | 3055 |
| P | 3059 |
License history
| Date | File or call sign | Action |
|---|
| 2016-01-02 | WQDU231 | LIEXP |
| 2015-10-21 | WQDU231 | ESURNW |
| 2015-10-01 | WQDU231 | ESURNW |
| 2015-09-01 | WQDU231 | ESURNW |
| 2015-08-10 | WQDU231 | LETRES |
| 2015-08-02 | WQDU231 | ESURNW |
| 2005-10-31 | WQDU231 | LIISS |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 2760051 | 2026-08-02 01:25:43 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
|---|
| Call Sign | WQDU231 | ULS 2760051 | 2026-08-02 01:25:43 |
| Status | E | ULS 2760051 | 2026-08-02 01:25:43 |
| Service | PA | ULS 2760051 | 2026-08-02 01:25:43 |
| Grant Date | 2005-10-31 | ULS 2760051 | 2026-08-02 01:25:43 |
| Expiration Date | 2015-10-31 | ULS 2760051 | 2026-08-02 01:25:43 |
| Cancellation Date | 2016-01-02 | ULS 2760051 | 2026-08-02 01:25:43 |