Universal Licensing System
WRDH250
Riverdale School District
License details
| ULS identifier | 4154697 |
|---|
| Call sign | WRDH250 |
|---|
| Radio service | IG |
|---|
| Status | A |
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| Grant date | 2019-04-27 |
|---|
| Expiration | 2029-04-27 |
|---|
| Frequency range | 151.52 - 466.75 MHz (6 frequencies) |
|---|
| Locations | 1 |
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| Representative location | PORTLAND, MULTNOMAH, OR |
|---|
| Coordinates | 45.4400833, -122.6561667 |
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| Source archive | l_LMpriv.zip |
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| Dataset refreshed | 2026-08-02 01:22:45 |
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Frequency assignments
| Location | Antenna | Station class | Assigned MHz | Upper MHz | Carrier MHz | Output W | ERP W | Altitude |
|---|
| 1 | 1 | MO | 151.52000000 | | | 5.000000 | 5.000000 | |
| 1 | 1 | MO | 151.53500000 | | | 5.000000 | 5.000000 | |
| 1 | 1 | MO | 151.55000000 | | | 5.000000 | 5.000000 | |
| 1 | 1 | MO | 151.56500000 | | | 5.000000 | 5.000000 | |
| 2 | 1 | MO | 461.75000000 | | | 4.000000 | 4.000000 | |
| 2 | 1 | MO | 466.75000000 | | | 4.000000 | 4.000000 | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 1 | 1 | 151.52000000 | | 11K2F3E |
| 1 | 1 | 151.53500000 | | 11K2F3E |
| 1 | 1 | 151.55000000 | | 11K2F3E |
| 1 | 1 | 151.56500000 | | 11K2F3E |
| 2 | 1 | 461.75000000 | | 11K2F3E |
| 2 | 1 | 461.75000000 | | 7K60FXE |
| 2 | 1 | 466.75000000 | | 7K60FXE |
| 2 | 1 | 466.75000000 | | 11K2F3E |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 1 | T | PORTLAND, MULTNOMAH, OR | 45.45408333, -122.68461111 | | | | |
| 2 | T | PORTLAND, MULTNOMAH, OR | 45.44008333, -122.65616667 | | | | N |
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 |
|---|
| 1 | 9727 SW Terilliger Blvd, PORTLAND, OR | MULTNOMAH | 5032624844 |
| 2 | 11733 SW BREYMAN AVE, PORTLAND, OR | MULTNOMAH | 5032624840 |
License history
| Date | File or call sign | Action |
|---|
| 2024-04-09 | WRDH250 | LETCNS |
| 2023-07-07 | WRDH250 | LIMOD |
| 2020-01-28 | WRDH250 | LETCNS |
| 2019-04-27 | WRDH250 | LIISS |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 4154697 | 2026-08-02 01:22:45 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
|---|
| Call Sign | WRDH250 | ULS 4154697 | 2026-08-02 01:22:45 |
| Status | A | ULS 4154697 | 2026-08-02 01:22:45 |
| Service | IG | ULS 4154697 | 2026-08-02 01:22:45 |
| Grant Date | 2019-04-27 | ULS 4154697 | 2026-08-02 01:22:45 |
| Expiration Date | 2029-04-27 | ULS 4154697 | 2026-08-02 01:22:45 |