Universal Licensing System
WPWL494
Shamrock Materials Inc
License details
| ULS identifier | 2468243 |
|---|
| Call sign | WPWL494 |
|---|
| Radio service | IG |
|---|
| Status | E |
|---|
| Grant date | 2002-12-13 |
|---|
| Expiration | 2012-12-13 |
|---|
| Cancellation | 2013-02-16 |
|---|
| Frequency range | 452.25 - 467.275 MHz (5 frequencies) |
|---|
| Locations | 4 |
|---|
| Representative location | Novato, MARIN, CA |
|---|
| Coordinates | 38.0591667, -122.6027778 |
|---|
| Source archive | l_LMpriv.zip |
|---|
| Dataset refreshed | 2026-08-02 01:25:03 |
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Licensee
| Name | Shamrock Materials Inc |
|---|
| Applicant type | C |
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| FRN | 0005707344 |
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| Location | Petaluma, CA |
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| Address | 181 Lynch Creek Wy, Petaluma, CA, 94954 |
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| Phone | 7077658560 |
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Frequency assignments
| Location | Antenna | Station class | Assigned MHz | Upper MHz | Carrier MHz | Output W | ERP W | Altitude |
|---|
| 1 | 1 | FB2 | 452.07500000 | | | 100.000000 | 275.000000 | |
| 3 | 1 | MO | 452.07500000 | | | 75.000000 | 75.000000 | |
| 2 | 1 | FB2 | 452.25000000 | | | 100.000000 | 275.000000 | |
| 4 | 1 | MO | 452.25000000 | | | 75.000000 | 75.000000 | |
| 3 | 1 | MO | 457.07500000 | | | 75.000000 | 75.000000 | |
| 4 | 1 | MO | 457.25000000 | | | 75.000000 | 75.000000 | |
| 2 | 1 | FB2 | 461.82500000 | | | 100.000000 | 275.000000 | |
| 4 | 1 | MO | 461.82500000 | | | 75.000000 | 75.000000 | |
| 1 | 1 | FB2 | 462.27500000 | | | 100.000000 | 275.000000 | |
| 3 | 1 | MO | 462.27500000 | | | 75.000000 | 75.000000 | |
| 4 | 1 | MO | 466.82500000 | | | 75.000000 | 75.000000 | |
| 3 | 1 | MO | 467.27500000 | | | 75.000000 | 75.000000 | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 1 | 1 | 452.07500000 | | 20K0F3E |
| 1 | 1 | 452.07500000 | | 20K0F1D |
| 3 | 1 | 452.07500000 | | 20K0F1D |
| 3 | 1 | 452.07500000 | | 20K0F3E |
| 2 | 1 | 452.25000000 | | 20K0F3E |
| 2 | 1 | 452.25000000 | | 20K0F1D |
| 4 | 1 | 452.25000000 | | 20K0F3E |
| 4 | 1 | 452.25000000 | | 20K0F1D |
| 3 | 1 | 457.07500000 | | 20K0F3E |
| 3 | 1 | 457.07500000 | | 20K0F1D |
| 4 | 1 | 457.25000000 | | 20K0F1D |
| 4 | 1 | 457.25000000 | | 20K0F3E |
| 2 | 1 | 461.82500000 | | 20K0F1D |
| 2 | 1 | 461.82500000 | | 20K0F3E |
| 4 | 1 | 461.82500000 | | 20K0F3E |
| 4 | 1 | 461.82500000 | | 20K0F1D |
| 1 | 1 | 462.27500000 | | 20K0F1D |
| 1 | 1 | 462.27500000 | | 20K0F3E |
| 3 | 1 | 462.27500000 | | 20K0F1D |
| 3 | 1 | 462.27500000 | | 20K0F3E |
| 4 | 1 | 466.82500000 | | 20K0F3E |
| 4 | 1 | 466.82500000 | | 20K0F1D |
| 3 | 1 | 467.27500000 | | 20K0F1D |
| 3 | 1 | 467.27500000 | | 20K0F3E |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 1 | T | Big Rock Ridge West, Novato, MARIN, CA | 38.05916667, -122.60277778 | 175.300 m | TOWER | 3.600 m structure / 3.600 m overall | |
| 2 | T | MOUNT ST HELENA NEAR, KELLOGG, SONOMA, CA | 38.66944444, -122.63055556 | 122.800 m | TOWER | 9.400 m structure / 9.400 m overall | |
| 3 | T | | | | | | |
| 4 | T | | | | | | |
Antennas
| Location | Antenna | Type | Make / model | Height | Polarization | Gain dB | Azimuth | Radiation center | Maximum EIRP W |
|---|
| 1 | 1 | | | 3.600 m | | 0.0000 | 0.0000 | 134.700 | |
| 1 | 2 | | | 9.400 m | | 0.0000 | 0.0000 | 5.100 | |
| 1 | 3 | | | | | | | | |
| 1 | 4 | | | | | | | | |
Control points
| Number | Address | County | Phone |
|---|
| 1 | 665 Irwin St, San Rafael, CA | MARIN | 4155499055 |
License history
| Date | File or call sign | Action |
|---|
| 2013-02-16 | WPWL494 | LIEXP |
| 2012-09-17 | WPWL494 | LETRES |
| 2003-09-15 | WPWL494 | LETCNS |
| 2002-12-13 | WPWL494 | LIISS |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 2468243 | 2026-08-02 01:25:03 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
|---|
| Call Sign | WPWL494 | ULS 2468243 | 2026-08-02 01:25:03 |
| Status | E | ULS 2468243 | 2026-08-02 01:25:03 |
| Service | IG | ULS 2468243 | 2026-08-02 01:25:03 |
| Grant Date | 2002-12-13 | ULS 2468243 | 2026-08-02 01:25:03 |
| Expiration Date | 2012-12-13 | ULS 2468243 | 2026-08-02 01:25:03 |
| Cancellation Date | 2013-02-16 | ULS 2468243 | 2026-08-02 01:25:03 |