Universal Licensing System
WRFV421
City of Medford
License details
| ULS identifier | 4277910 |
|---|
| Call sign | WRFV421 |
|---|
| Radio service | MW |
|---|
| Status | A |
|---|
| Grant date | 2020-05-11 |
|---|
| Expiration | 2030-05-11 |
|---|
| Frequency range | 17955 - 19395 MHz (4 frequencies) |
|---|
| Locations | 2 |
|---|
| Representative location | Medford, MIDDLESEX, MA |
|---|
| Coordinates | 42.4155833, -71.1100000 |
|---|
| Source archive | l_micro.zip |
|---|
| Dataset refreshed | 2026-08-02 02:43:28 |
|---|
Frequency assignments
| Location | Antenna | Station class | Assigned MHz | Upper MHz | Carrier MHz | Output W | ERP W | Altitude |
|---|
| 1 | 1 | FXO | 17955.00000000 | | | | | |
| 1 | 2 | FXO | 18015.00000000 | | | | | |
| 1 | 3 | FXO | 19325.00000000 | | | | | |
| 1 | 4 | FXO | 19395.00000000 | | | | | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 1 | 1 | 17955.00000000 | | 10M0D7W |
| 1 | 2 | 18015.00000000 | | 10M0D7W |
| 1 | 3 | 19325.00000000 | | 10M0D7W |
| 1 | 4 | 19395.00000000 | | 10M0D7W |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 1 | T | 100 Main St, Medford, MIDDLESEX, MA | 42.41558333, -71.11000000 | 6.100 m | LTOWER | 44.200 m structure / 47.200 m overall | N |
| 2 | R | | 42.41638889, -71.10536111 | 8.200 m | | | |
| 3 | R | | 42.40783333, -71.12158333 | 41.100 m | | | |
| 4 | R | | 42.40997222, -71.09522222 | 7.600 m | | | |
Antennas
| Location | Antenna | Type | Make / model | Height | Polarization | Gain dB | Azimuth | Radiation center | Maximum EIRP W |
|---|
| 1 | 1 | T | RFS SB1-190C | | V | 34.2000 | 76.8000 | | |
| 1 | 2 | R | RFS SB1-190C | | | 34.2000 | | | |
| 1 | 3 | R | RFS SB1-190C | | | 34.2000 | | | |
| 1 | 4 | R | RFS SC2-190B | | | 39.0000 | | | |
| 2 | 1 | T | RFS SB1-190C | | V | 34.2000 | 76.8000 | | |
| 2 | 2 | R | RFS SB1-190C | | | 34.2000 | | | |
| 3 | 1 | T | RFS SC2-190B | | V | 39.0000 | 227.9000 | | |
| 4 | 1 | T | RFS SC2-190B | | V | 39.0000 | 117.1000 | | |
License history
| Date | File or call sign | Action |
|---|
| 2021-02-01 | WRFV421 | LIMOD |
| 2020-05-11 | WRFV421 | LIISS |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 4277910 | 2026-08-02 02:43:28 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
|---|
| Call Sign | WRFV421 | ULS 4277910 | 2026-08-02 02:43:28 |
| Status | A | ULS 4277910 | 2026-08-02 02:43:28 |
| Service | MW | ULS 4277910 | 2026-08-02 02:43:28 |
| Grant Date | 2020-05-11 | ULS 4277910 | 2026-08-02 02:43:28 |
| Expiration Date | 2030-05-11 | ULS 4277910 | 2026-08-02 02:43:28 |