Universal Licensing System
WRDT252
The Hamlin School
License details
| ULS identifier | 4179381 |
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| Call sign | WRDT252 |
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| Radio service | IG |
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| Status | A |
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| Grant date | 2019-07-15 |
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| Expiration | 2029-07-15 |
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| Frequency range | 72.06 - 72.1 MHz (2 frequencies) |
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| Locations | 1 |
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| Representative location | San Francisco, SAN FRANCISCO, CA |
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| Coordinates | 37.7955278, -122.4326389 |
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| Source archive | l_LMpriv.zip |
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| Dataset refreshed | 2026-08-02 01:22:58 |
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Frequency assignments
| Location | Antenna | Station class | Assigned MHz | Upper MHz | Carrier MHz | Output W | ERP W | Altitude |
|---|
| 2 | 1 | MO | 72.06000000 | | | 1.000000 | 1.000000 | |
| 1 | 1 | MO | 72.10000000 | | | 1.000000 | 1.000000 | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 2 | 1 | 72.06000000 | | 20K0F1D |
| 1 | 1 | 72.10000000 | | 20K0F1D |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 1 | T | San Francisco, SAN FRANCISCO, CA | 37.79486111, -122.43250000 | | | | |
| 2 | T | San Francisco, SAN FRANCISCO, CA | 37.79552778, -122.43263889 | | | | N |
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 | 2120 Broadway St., San Francisco, CA | SAN FRANCISCO | 4152591048 |
| 2 | 2129 Vallejo St. - Hamlin Lower Sch., San Francisco, CA | SAN FRANCISCO | 4152591048 |
License history
| Date | File or call sign | Action |
|---|
| 2021-10-19 | WRDT252 | LIMOD |
| 2019-07-15 | WRDT252 | LIISS |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 4179381 | 2026-08-02 01:22:58 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
|---|
| Call Sign | WRDT252 | ULS 4179381 | 2026-08-02 01:22:58 |
| Status | A | ULS 4179381 | 2026-08-02 01:22:58 |
| Service | IG | ULS 4179381 | 2026-08-02 01:22:58 |
| Grant Date | 2019-07-15 | ULS 4179381 | 2026-08-02 01:22:58 |
| Expiration Date | 2029-07-15 | ULS 4179381 | 2026-08-02 01:22:58 |