Universal Licensing System
WRDA688
MARKHAM VINEYARDS
License details
| ULS identifier | 4133548 |
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| Call sign | WRDA688 |
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| Radio service | IG |
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| Status | A |
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| Grant date | 2019-03-13 |
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| Expiration | 2029-03-13 |
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| Frequency range | 452.3125 - 457.3125 MHz (2 frequencies) |
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| Locations | 1 |
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| Representative location | SAINT HELENA, NAPA, CA |
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| Coordinates | 38.5219722, -122.4872500 |
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| Source archive | l_LMpriv.zip |
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| Dataset refreshed | 2026-08-02 01:22:34 |
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Frequency assignments
| Location | Antenna | Station class | Assigned MHz | Upper MHz | Carrier MHz | Output W | ERP W | Altitude |
|---|
| 1 | 1 | MO | 452.31250000 | | | 4.000000 | 4.000000 | |
| 1 | 1 | MO | 457.31250000 | | | 4.000000 | 4.000000 | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 1 | 1 | 452.31250000 | | 4K00F1E |
| 1 | 1 | 452.31250000 | | 8K30F1E |
| 1 | 1 | 457.31250000 | | 4K00F1E |
| 1 | 1 | 457.31250000 | | 8K30F1E |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 1 | T | SAINT HELENA, NAPA, CA | 38.52197222, -122.48725000 | | | | |
Antennas
| Location | Antenna | Type | Make / model | Height | Polarization | Gain dB | Azimuth | Radiation center | Maximum EIRP W |
|---|
| 1 | 1 | T | | | | | | | |
Control points
| Number | Address | County | Phone |
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| 1 | 2812 ST HELENA HWY, SAINT HELENA, CA | NAPA | 7079635292 |
License history
| Date | File or call sign | Action |
|---|
| 2019-03-13 | WRDA688 | LIISS |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 4133548 | 2026-08-02 01:22:34 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
|---|
| Call Sign | WRDA688 | ULS 4133548 | 2026-08-02 01:22:34 |
| Status | A | ULS 4133548 | 2026-08-02 01:22:34 |
| Service | IG | ULS 4133548 | 2026-08-02 01:22:34 |
| Grant Date | 2019-03-13 | ULS 4133548 | 2026-08-02 01:22:34 |
| Expiration Date | 2029-03-13 | ULS 4133548 | 2026-08-02 01:22:34 |