Universal Licensing System
WSMR277
IMPLECHO
License details
| ULS identifier | 5296177 |
|---|
| Call sign | WSMR277 |
|---|
| Radio service | IG |
|---|
| Status | A |
|---|
| Grant date | 2026-04-29 |
|---|
| Expiration | 2026-06-10 |
|---|
| Frequency range | 451.1875 - 457.7125 MHz (16 frequencies) |
|---|
| Locations | 2 |
|---|
| Representative location | Chicago, COOK, IL |
|---|
| Coordinates | 41.8755556, -87.6191667 |
|---|
| Source archive | l_LMpriv.zip |
|---|
| Dataset refreshed | 2026-08-02 01:24:18 |
|---|
Frequency assignments
| Location | Antenna | Station class | Assigned MHz | Upper MHz | Carrier MHz | Output W | ERP W | Altitude |
|---|
| 1 | 1 | FB2 | 451.18750000 | | | 8.000000 | 8.000000 | |
| 2 | 1 | MO | 451.18750000 | | | 4.000000 | 4.000000 | |
| 1 | 1 | FB2 | 451.33750000 | | | 8.000000 | 8.000000 | |
| 2 | 1 | MO | 451.33750000 | | | 4.000000 | 4.000000 | |
| 1 | 1 | FB2 | 451.43750000 | | | 8.000000 | 8.000000 | |
| 2 | 1 | MO | 451.43750000 | | | 4.000000 | 4.000000 | |
| 1 | 1 | FB2 | 451.63750000 | | | 8.000000 | 8.000000 | |
| 2 | 1 | MO | 451.63750000 | | | 4.000000 | 4.000000 | |
| 1 | 1 | FB2 | 451.66250000 | | | 8.000000 | 8.000000 | |
| 2 | 1 | MO | 451.66250000 | | | 4.000000 | 4.000000 | |
| 1 | 1 | FB2 | 451.96250000 | | | 8.000000 | 8.000000 | |
| 2 | 1 | MO | 451.96250000 | | | 4.000000 | 4.000000 | |
| 1 | 1 | FB2 | 452.31250000 | | | 8.000000 | 8.000000 | |
| 2 | 1 | MO | 452.31250000 | | | 4.000000 | 4.000000 | |
| 1 | 1 | FB2 | 452.71250000 | | | 8.000000 | 8.000000 | |
| 2 | 1 | MO | 452.71250000 | | | 4.000000 | 4.000000 | |
| 2 | 1 | MO | 456.18750000 | | | 4.000000 | 4.000000 | |
| 2 | 1 | MO | 456.33750000 | | | 4.000000 | 4.000000 | |
| 2 | 1 | MO | 456.43750000 | | | 4.000000 | 4.000000 | |
| 2 | 1 | MO | 456.63750000 | | | 4.000000 | 4.000000 | |
| 2 | 1 | MO | 456.66250000 | | | 4.000000 | 4.000000 | |
| 2 | 1 | MO | 456.96250000 | | | 4.000000 | 4.000000 | |
| 2 | 1 | MO | 457.31250000 | | | 4.000000 | 4.000000 | |
| 2 | 1 | MO | 457.71250000 | | | 4.000000 | 4.000000 | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 1 | 1 | 451.18750000 | | 7K60FXD |
| 1 | 1 | 451.18750000 | | 7K60FXE |
| 2 | 1 | 451.18750000 | | 7K60FXE |
| 2 | 1 | 451.18750000 | | 7K60FXD |
| 1 | 1 | 451.33750000 | | 7K60FXD |
| 1 | 1 | 451.33750000 | | 7K60FXE |
| 2 | 1 | 451.33750000 | | 7K60FXE |
| 2 | 1 | 451.33750000 | | 7K60FXD |
| 1 | 1 | 451.43750000 | | 7K60FXD |
| 1 | 1 | 451.43750000 | | 7K60FXE |
| 2 | 1 | 451.43750000 | | 7K60FXE |
| 2 | 1 | 451.43750000 | | 7K60FXD |
| 1 | 1 | 451.63750000 | | 7K60FXE |
| 1 | 1 | 451.63750000 | | 7K60FXD |
| 2 | 1 | 451.63750000 | | 7K60FXE |
| 2 | 1 | 451.63750000 | | 7K60FXD |
| 1 | 1 | 451.66250000 | | 7K60FXD |
| 1 | 1 | 451.66250000 | | 7K60FXE |
| 2 | 1 | 451.66250000 | | 7K60FXD |
| 2 | 1 | 451.66250000 | | 7K60FXE |
| 1 | 1 | 451.96250000 | | 7K60FXE |
| 1 | 1 | 451.96250000 | | 7K60FXD |
| 2 | 1 | 451.96250000 | | 7K60FXD |
| 2 | 1 | 451.96250000 | | 7K60FXE |
| 1 | 1 | 452.31250000 | | 7K60FXD |
| 1 | 1 | 452.31250000 | | 7K60FXE |
| 2 | 1 | 452.31250000 | | 7K60FXD |
| 2 | 1 | 452.31250000 | | 7K60FXE |
| 1 | 1 | 452.71250000 | | 7K60FXD |
| 1 | 1 | 452.71250000 | | 7K60FXE |
| 2 | 1 | 452.71250000 | | 7K60FXE |
| 2 | 1 | 452.71250000 | | 7K60FXD |
| 2 | 1 | 456.18750000 | | 7K60FXE |
| 2 | 1 | 456.18750000 | | 7K60FXD |
| 2 | 1 | 456.33750000 | | 7K60FXD |
| 2 | 1 | 456.33750000 | | 7K60FXE |
| 2 | 1 | 456.43750000 | | 7K60FXE |
| 2 | 1 | 456.43750000 | | 7K60FXD |
| 2 | 1 | 456.63750000 | | 7K60FXE |
| 2 | 1 | 456.63750000 | | 7K60FXD |
| 2 | 1 | 456.66250000 | | 7K60FXD |
| 2 | 1 | 456.66250000 | | 7K60FXE |
| 2 | 1 | 456.96250000 | | 7K60FXE |
| 2 | 1 | 456.96250000 | | 7K60FXD |
| 2 | 1 | 457.31250000 | | 7K60FXD |
| 2 | 1 | 457.31250000 | | 7K60FXE |
| 2 | 1 | 457.71250000 | | 7K60FXE |
| 2 | 1 | 457.71250000 | | 7K60FXD |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 1 | T | Columbus and East Balbo Ave, Chicago, COOK, IL | 41.87555556, -87.61916667 | 182.000 m | B | 11.000 m structure / 11.000 m overall | |
| 2 | T | | | | | | |
Antennas
| Location | Antenna | Type | Make / model | Height | Polarization | Gain dB | Azimuth | Radiation center | Maximum EIRP W |
|---|
| 1 | 1 | T | | 11.000 m | | | | 14.500 | |
| 1 | 2 | T | | | | | | | |
Control points
| Number | Address | County | Phone |
|---|
| 1 | Columbus and East Balbo Ave, Chicago, IL | COOK | 2625233133 |
Special conditions
| Type | Condition code |
|---|
| P | 5004 |
| T | 1003 |
License history
| Date | File or call sign | Action |
|---|
| 2026-05-13 | WSMR277 | PLAUPR |
| 2026-05-12 | WSMR277 | LIMOD |
| 2026-05-12 | WSMR277 | COR |
| 2026-05-12 | WSMR277 | INTDUP |
| 2026-04-30 | WSMR277 | PLAUPR |
| 2026-04-29 | WSMR277 | COR |
| 2026-04-29 | WSMR277 | LIISS |
| 2026-04-29 | WSMR277 | INTDUP |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 5296177 | 2026-08-02 01:24:18 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
|---|
| Call Sign | WSMR277 | ULS 5296177 | 2026-08-02 01:24:18 |
| Status | A | ULS 5296177 | 2026-08-02 01:24:18 |
| Service | IG | ULS 5296177 | 2026-08-02 01:24:18 |
| Grant Date | 2026-04-29 | ULS 5296177 | 2026-08-02 01:24:18 |
| Expiration Date | 2026-06-10 | ULS 5296177 | 2026-08-02 01:24:18 |