Universal Licensing System
KB91541
EXPLORATORIUM
License details
| ULS identifier | 1598907 |
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| Call sign | KB91541 |
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| Radio service | IG |
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| Status | E |
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| Grant date | 2002-04-04 |
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| Expiration | 2012-06-01 |
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| Cancellation | 2012-08-04 |
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| Frequency range | 461.1625 - 464.55 MHz (4 frequencies) |
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| Locations | 2 |
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| Representative location | SAN FRANCISCO, CA |
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| Coordinates | 37.7999167, -122.4846944 |
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| Source archive | l_LMpriv.zip |
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| Dataset refreshed | 2026-08-02 01:16:01 |
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Licensee
| Name | EXPLORATORIUM |
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| Applicant type | C |
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| FRN | 0006755516 |
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| Location | SAN FRANCISCO, CA |
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| Address | 3601 LYON ST, SAN FRANCISCO, CA, 94123 |
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| Phone | 4155637337 |
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Frequency assignments
| Location | Antenna | Station class | Assigned MHz | Upper MHz | Carrier MHz | Output W | ERP W | Altitude |
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| 1 | 1 | MO | 461.16250000 | | | 2.000000 | | |
| 1 | 1 | MO | 461.58750000 | | | 2.000000 | | |
| 1 | 1 | MO | 464.16250000 | | | 2.000000 | | |
| 2 | 1 | MO | 464.55000000 | | | 2.000000 | | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 1 | 1 | 461.16250000 | | 20K0F3E |
| 1 | 1 | 461.58750000 | | 20K0F3E |
| 1 | 1 | 464.16250000 | | 20K0F3E |
| 2 | 1 | 464.55000000 | | 20K0F3E |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 1 | T | SAN FRANCISCO, CA | 37.79991667, -122.48469444 | | | | |
| 2 | T | SAN FRANCISCO, CA | | | | | |
Antennas
| Location | Antenna | Type | Make / model | Height | Polarization | Gain dB | Azimuth | Radiation center | Maximum EIRP W |
|---|
| 1 | 1 | T | | | | | | | |
| 1 | 2 | T | | | | | | | |
Control points
| Number | Address | County | Phone |
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| 1 | 3601 LYON ST, SAN FRANCISCO, CA | | 4155637337 |
License history
| Date | File or call sign | Action |
|---|
| 2012-08-04 | KB91541 | LIEXP |
| 2012-03-05 | KB91541 | LETRES |
| 2002-04-04 | KB91541 | LIREN |
| 2002-03-04 | KB91541 | LETRES |
| 2001-10-15 | KB91541 | AUDOPR |
| 2000-11-22 | KB91541 | LICCNV |
| 1997-06-27 | KB91541 | AUTHPR |
| 1997-06-27 | KB91541 | LIREN |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 1598907 | 2026-08-02 01:16:01 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
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| Call Sign | KB91541 | ULS 1598907 | 2026-08-02 01:16:01 |
| Status | E | ULS 1598907 | 2026-08-02 01:16:01 |
| Service | IG | ULS 1598907 | 2026-08-02 01:16:01 |
| Grant Date | 2002-04-04 | ULS 1598907 | 2026-08-02 01:16:01 |
| Expiration Date | 2012-06-01 | ULS 1598907 | 2026-08-02 01:16:01 |
| Cancellation Date | 2012-08-04 | ULS 1598907 | 2026-08-02 01:16:01 |