Universal Licensing System
WPWT257
HARBISON WALKER REFRACTORIES COMPANY
License details
| ULS identifier | 2477325 |
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| Call sign | WPWT257 |
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| Radio service | IG |
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| Status | E |
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| Grant date | 2003-01-16 |
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| Expiration | 2013-01-16 |
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| Cancellation | 2013-03-23 |
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| Frequency range | 153.185 - 159.735 MHz (3 frequencies) |
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| Locations | 3 |
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| Representative location | LUDINGTON, MASON, MI |
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| Coordinates | 43.9394444, -86.4236944 |
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| Source archive | l_LMpriv.zip |
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| Dataset refreshed | 2026-08-02 01:24:50 |
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Licensee
| Name | HARBISON WALKER REFRACTORIES COMPANY |
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| Applicant type | C |
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| FRN | 0006954903 |
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| Location | LUDINGTON, MI |
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| Address | US 31 SOUTH, LUDINGTON, MI, 49431 |
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| Phone | 2318433421 |
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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 | FB2 | 153.18500000 | | | 50.000000 | 200.000000 | |
| 2 | 1 | MO | 153.18500000 | | | 30.000000 | 30.000000 | |
| 3 | 1 | MO | 153.38000000 | | | 30.000000 | 30.000000 | |
| 2 | 1 | MO | 159.73500000 | | | 30.000000 | 30.000000 | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 1 | 1 | 153.18500000 | | 20K0F3E |
| 2 | 1 | 153.18500000 | | 20K0F3E |
| 3 | 1 | 153.38000000 | | 20K0F3E |
| 2 | 1 | 159.73500000 | | 20K0F3E |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
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| 1 | T | US 31 S, LUDINGTON, MASON, MI | 43.93944444, -86.42369444 | 213.000 m | SILO | 30.000 m structure / 36.000 m overall | |
| 2 | T | | 43.93944444, -86.42369444 | 0.000 m | | | |
| 3 | T | LUDINGTON, MASON, MI | 43.93944444, -86.42369444 | 0.000 m | | | |
Antennas
| Location | Antenna | Type | Make / model | Height | Polarization | Gain dB | Azimuth | Radiation center | Maximum EIRP W |
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| 1 | 1 | | | 36.000 m | | | | 54.000 | |
| 1 | 2 | | | | | | | | |
| 1 | 3 | | | | | | | | |
Control points
| Number | Address | County | Phone |
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| 1 | 921 PERE MARQUETE HIGHWAY, LUDINGTON, MI | MASON | 2318433421 |
License history
| Date | File or call sign | Action |
|---|
| 2013-03-23 | WPWT257 | LIEXP |
| 2012-10-22 | WPWT257 | LETRES |
| 2003-10-14 | WPWT257 | LETCNS |
| 2003-01-16 | WPWT257 | LIISS |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 2477325 | 2026-08-02 01:24:50 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
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| Call Sign | WPWT257 | ULS 2477325 | 2026-08-02 01:24:50 |
| Status | E | ULS 2477325 | 2026-08-02 01:24:50 |
| Service | IG | ULS 2477325 | 2026-08-02 01:24:50 |
| Grant Date | 2003-01-16 | ULS 2477325 | 2026-08-02 01:24:50 |
| Expiration Date | 2013-01-16 | ULS 2477325 | 2026-08-02 01:24:50 |
| Cancellation Date | 2013-03-23 | ULS 2477325 | 2026-08-02 01:24:50 |