Universal Licensing System
WHH831
JOHN HOPKINS UNIVERSITY
License details
| ULS identifier | 981795 |
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| Call sign | WHH831 |
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| Radio service | MG |
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| Status | E |
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| Grant date | 2002-11-16 |
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| Expiration | 2012-10-27 |
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| Cancellation | 2012-12-29 |
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| Frequency range | 12530 - 12690 MHz (4 frequencies) |
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| Locations | 4 |
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| Representative location | BALTIMORE, MD |
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| Coordinates | 39.2875833, -76.6152222 |
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| Source archive | l_micro.zip |
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| Dataset refreshed | 2026-08-02 02:42:43 |
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Licensee
| Name | JOHN HOPKINS UNIVERSITY |
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| Applicant type | C |
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| FRN | 0002161057 |
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| Location | BALTIMORE, MD |
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| Address | 210 Maryland Hall, 3400 N. Charles Street, BALTIMORE, MD, 21218 |
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| Phone | 4105168708 |
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Frequency assignments
| Location | Antenna | Station class | Assigned MHz | Upper MHz | Carrier MHz | Output W | ERP W | Altitude |
|---|
| 1 | 2 | FXO | 12530.00000000 | | | | | |
| 1 | 1 | FXO | 12570.00000000 | | | | | |
| 1 | 2 | FXO | 12630.00000000 | | | | | |
| 1 | 3 | FXO | 12690.00000000 | | | | | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 1 | 2 | 12530.00000000 | | 18M7F9W |
| 1 | 1 | 12570.00000000 | | 18M7F9W |
| 1 | 2 | 12630.00000000 | | 18M7F9W |
| 1 | 3 | 12690.00000000 | | 18M7F9W |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 1 | T | USF&G BLDG 100 LIGHT ST, BALTIMORE, MD | 39.28758333, -76.61522222 | 4.000 m | | 161.500 m structure / 161.500 m overall | |
| 2 | R | | 39.16425000, -76.90052778 | 137.800 m | | | |
| 3 | R | | 39.29952778, -76.59216667 | 27.100 m | | | |
| 4 | R | | 39.32813889, -76.61938889 | 70.100 m | | | |
Antennas
| Location | Antenna | Type | Make / model | Height | Polarization | Gain dB | Azimuth | Radiation center | Maximum EIRP W |
|---|
| 1 | 1 | T | | | V | 41.4000 | 56.3000 | | |
| 1 | 2 | R | | | | 41.4000 | | | |
| 1 | 3 | R | | | | 41.4000 | | | |
| 1 | 4 | R | | | | 41.4000 | | | |
| 2 | 1 | T | | | H | 41.4000 | 241.0000 | | |
| 3 | 1 | T | | | V | 41.4000 | 355.4000 | | |
License history
| Date | File or call sign | Action |
|---|
| 2012-12-29 | WHH831 | LIEXP |
| 2012-08-06 | WHH831 | LETRES |
| 2002-11-16 | WHH831 | LIREN |
| 2002-08-05 | WHH831 | LETRES |
| 2002-07-09 | WHH831 | AUTHPR |
| 2002-07-08 | WHH831 | INTDUP |
| 2002-01-17 | WHH831 | LIAUA |
| 1999-08-13 | WHH831 | LICCNV |
| 1998-01-06 | WHH831 | COR |
| 1997-08-08 | WHH831 | LIREN |
| 1992-10-27 | WHH831 | LIMOD |
| 1987-08-31 | WHH831 | LIMOD |
| 1983-04-29 | WHH831 | LIMOD |
| 1983-04-14 | WHH831 | LIMOD |
| 1982-08-25 | WHH831 | LIISS |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 981795 | 2026-08-02 02:42:43 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
|---|
| Call Sign | WHH831 | ULS 981795 | 2026-08-02 02:42:43 |
| Status | E | ULS 981795 | 2026-08-02 02:42:43 |
| Service | MG | ULS 981795 | 2026-08-02 02:42:43 |
| Grant Date | 2002-11-16 | ULS 981795 | 2026-08-02 02:42:43 |
| Expiration Date | 2012-10-27 | ULS 981795 | 2026-08-02 02:42:43 |
| Cancellation Date | 2012-12-29 | ULS 981795 | 2026-08-02 02:42:43 |