Universal Licensing System
WRDD835
Widmo Holdings LLC
License details
| ULS identifier | 4145963 |
|---|
| Call sign | WRDD835 |
|---|
| Radio service | MG |
|---|
| Status | A |
|---|
| Grant date | 2019-04-04 |
|---|
| Expiration | 2029-04-04 |
|---|
| Frequency range | 18060 - 21975 MHz (2 frequencies) |
|---|
| Locations | 3 |
|---|
| Representative location | CAMBRIDGE, MIDDLESEX, MA |
|---|
| Coordinates | 42.4099722, -71.0952222 |
|---|
| Source archive | l_micro.zip |
|---|
| Dataset refreshed | 2026-08-02 02:45:25 |
|---|
Frequency assignments
| Location | Antenna | Station class | Assigned MHz | Upper MHz | Carrier MHz | Output W | ERP W | Altitude |
|---|
| 1 | 3 | FXO | 18060.00000000 | | | | | |
| 1 | 3 | FXO | 18060.00000000 | | | | | |
| 1 | 3 | FXO | 18060.00000000 | | | | | |
| 1 | 3 | FXO | 18060.00000000 | | | | | |
| 1 | 3 | FXO | 18060.00000000 | | | | | |
| 1 | 3 | FXO | 18060.00000000 | | | | | |
| 1 | 3 | FXO | 18060.00000000 | | | | | |
| 1 | 3 | FXO | 18060.00000000 | | | | | |
| 1 | 3 | FXO | 18060.00000000 | | | | | |
| 1 | 3 | FXO | 18060.00000000 | | | | | |
| 1 | 1 | FXO | 21975.00000000 | | | | | |
| 1 | 1 | FXO | 21975.00000000 | | | | | |
| 1 | 1 | FXO | 21975.00000000 | | | | | |
| 1 | 1 | FXO | 21975.00000000 | | | | | |
| 1 | 1 | FXO | 21975.00000000 | | | | | |
| 1 | 1 | FXO | 21975.00000000 | | | | | |
| 1 | 1 | FXO | 21975.00000000 | | | | | |
| 1 | 1 | FXO | 21975.00000000 | | | | | |
| 1 | 1 | FXO | 21975.00000000 | | | | | |
| 1 | 1 | FXO | 21975.00000000 | | | | | |
Emission designators
| Location | Antenna | Frequency MHz | Upper MHz | Emission |
|---|
| 1 | 3 | 18060.00000000 | | 80M0D7W |
| 1 | 3 | 18060.00000000 | | 80M0D7W |
| 1 | 3 | 18060.00000000 | | 80M0D7W |
| 1 | 3 | 18060.00000000 | | 80M0D7W |
| 1 | 3 | 18060.00000000 | | 80M0D7W |
| 1 | 3 | 18060.00000000 | | 80M0D7W |
| 1 | 3 | 18060.00000000 | | 80M0D7W |
| 1 | 3 | 18060.00000000 | | 80M0D7W |
| 1 | 3 | 18060.00000000 | | 80M0D7W |
| 1 | 3 | 18060.00000000 | | 80M0D7W |
| 1 | 1 | 21975.00000000 | | 50M0D7W |
| 1 | 1 | 21975.00000000 | | 50M0D7W |
| 1 | 1 | 21975.00000000 | | 50M0D7W |
| 1 | 1 | 21975.00000000 | | 50M0D7W |
| 1 | 1 | 21975.00000000 | | 50M0D7W |
| 1 | 1 | 21975.00000000 | | 50M0D7W |
| 1 | 1 | 21975.00000000 | | 50M0D7W |
| 1 | 1 | 21975.00000000 | | 50M0D7W |
| 1 | 1 | 21975.00000000 | | 50M0D7W |
| 1 | 1 | 21975.00000000 | | 50M0D7W |
Licensed locations
| Location | Type | Address | Coordinates | Ground elevation | Structure | Height | NEPA |
|---|
| 1 | T | 3610 MYSTIC VALLEY, CAMBRIDGE, MIDDLESEX, MA | 42.40997222, -71.09522222 | 4.900 m | B | 44.000 m structure / 44.000 m overall | |
| 2 | R | | 42.39155556, -71.12302778 | 8.200 m | | | |
| 4 | R | | 42.40050000, -71.06394444 | 5.200 m | | | |
Antennas
| Location | Antenna | Type | Make / model | Height | Polarization | Gain dB | Azimuth | Radiation center | Maximum EIRP W |
|---|
| 1 | 1 | T | RFS SCX2-220B OMT | | S | 40.2000 | 228.2000 | | |
| 1 | 2 | R | RFS SCX2-220B OMT | | | 40.2000 | | | |
| 1 | 4 | R | RFS SCX2-190B | | | 39.0000 | | | |
| 3 | 1 | T | RFS SCX2-190B | | S | 39.0000 | 112.2000 | | |
License history
| Date | File or call sign | Action |
|---|
| 2026-01-30 | WRDD835 | LITRAN |
| 2023-09-29 | WRDD835 | LIAUA |
| 2023-08-31 | WRDD835 | LIASS |
| 2023-06-08 | WRDD835 | LIASS |
| 2022-03-28 | WRDD835 | LITRAN |
| 2021-01-19 | WRDD835 | LOATRM |
| 2021-01-19 | WRDD835 | PAATRM |
| 2021-01-19 | WRDD835 | FRATRM |
| 2021-01-19 | WRDD835 | ANATRM |
| 2021-01-19 | WRDD835 | AUTHPR |
| 2020-11-12 | WRDD835 | LETTRS |
| 2020-11-12 | WRDD835 | PNLISR |
| 2020-07-07 | WRDD835 | LETCNS |
| 2019-11-19 | WRDD835 | LIAUA |
| 2019-04-04 | WRDD835 | LIISS |
Sources and provenance
| Source | Source record | Retrieved | Match |
|---|
| ULS | 4145963 | 2026-08-02 02:45:25 | Official Bulk Record |
Selected field provenance
| Field | Displayed value | Source | Observed |
|---|
| Call Sign | WRDD835 | ULS 4145963 | 2026-08-02 02:45:25 |
| Status | A | ULS 4145963 | 2026-08-02 02:45:25 |
| Service | MG | ULS 4145963 | 2026-08-02 02:45:25 |
| Grant Date | 2019-04-04 | ULS 4145963 | 2026-08-02 02:45:25 |
| Expiration Date | 2029-04-04 | ULS 4145963 | 2026-08-02 02:45:25 |