Universal Licensing System
WSDI677
Johns Hopkins University
License details
| ULS identifier | 4967378 |
|---|
| Call sign | WSDI677 |
|---|
| Radio service | IG |
|---|
| Status | A |
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| Grant date | 2024-06-14 |
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| Expiration | 2034-06-14 |
|---|
| Frequency range | 451.7625 - 457.3125 MHz (4 frequencies) |
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| Locations | 2 |
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| Representative location | Baltimore, BALTIMORE CITY, MD |
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| Coordinates | 39.3272222, -76.6194444 |
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| Source archive | l_LMpriv.zip |
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| Dataset refreshed | 2026-08-02 01:24:27 |
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Frequency assignments
| Location | Antenna | Station class | Assigned MHz | Upper MHz | Carrier MHz | Output W | ERP W | Altitude |
|---|
| 1 | 1 | FB2 | 451.76250000 | | | 20.000000 | 20.000000 | |
| 2 | 1 | MO | 451.76250000 | | | 6.000000 | 6.000000 | |
| 1 | 2 | FB2 | 452.31250000 | | | 20.000000 | 20.000000 | |
| 2 | 1 | MO | 452.31250000 | | | 6.000000 | 6.000000 | |
| 2 | 1 | MO | 456.76250000 | | | 6.000000 | 6.000000 | |
| 2 | 1 | MO | 457.31250000 | | | 6.000000 | 6.000000 | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 1 | 1 | 451.76250000 | | 4K00F1E |
| 1 | 1 | 451.76250000 | | 8K30F1E |
| 2 | 1 | 451.76250000 | | 4K00F1E |
| 2 | 1 | 451.76250000 | | 8K30F1E |
| 1 | 2 | 452.31250000 | | 8K30F1E |
| 1 | 2 | 452.31250000 | | 4K00F1E |
| 2 | 1 | 452.31250000 | | 4K00F1E |
| 2 | 1 | 452.31250000 | | 8K30F1E |
| 2 | 1 | 456.76250000 | | 8K30F1E |
| 2 | 1 | 456.76250000 | | 4K00F1E |
| 2 | 1 | 457.31250000 | | 4K00F1E |
| 2 | 1 | 457.31250000 | | 8K30F1E |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 1 | T | 3400 N Charles St, Baltimore, BALTIMORE CITY, MD | 39.32722222, -76.61944444 | 62.600 m | BANT | 3.000 m structure / 4.000 m overall | |
| 2 | T | | | | | | |
Antennas
| Location | Antenna | Type | Make / model | Height | Polarization | Gain dB | Azimuth | Radiation center | Maximum EIRP W |
|---|
| 1 | 1 | T | | 4.000 m | | | | -6.000 | |
| 1 | 2 | T | | | | | | | |
| 2 | 1 | T | | 4.000 m | | | | -6.000 | |
Control points
| Number | Address | County | Phone |
|---|
| 1 | 3400 N Charles St, Baltimore, MD | | 4105165593 |
License history
| Date | File or call sign | Action |
|---|
| 2025-03-18 | WSDI677 | LETCNS |
| 2024-08-05 | WSDI677 | LIMOD |
| 2024-06-14 | WSDI677 | LIISS |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 4967378 | 2026-08-02 01:24:27 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
|---|
| Call Sign | WSDI677 | ULS 4967378 | 2026-08-02 01:24:27 |
| Status | A | ULS 4967378 | 2026-08-02 01:24:27 |
| Service | IG | ULS 4967378 | 2026-08-02 01:24:27 |
| Grant Date | 2024-06-14 | ULS 4967378 | 2026-08-02 01:24:27 |
| Expiration Date | 2034-06-14 | ULS 4967378 | 2026-08-02 01:24:27 |