GB7LJ – Amateur Radio Repeater Club Project – 70CM Band
Contents
Project Overview
Our club is excited to announce the development of a new 70CM DMR (Digital Mobile Radio) amateur radio repeater as part of our ongoing club project initiative. This repeater is currently under construction and will serve the amateur radio community in the Bury area.
The callsign GB7LJ is in memory of our late Chair’ Lynda Jopson, who sadly became silent key following a brave battle with cancer.
Technical Specifications
| Callsign | GB7LJ |
| Band | 70CM (DVU54) |
| Output Frequency | 439.6750 MHz |
| Input Frequency | 430.6750 MHz |
| Location | IO83UN (Near BURY) |
| Coordinates | 53.56° N / -2.29° W |
| Antenna Height | 6 Metres above ground level |
| ERP | 10 dBW |
| Repeater Keeper | G4FZP Alan Dury (Club Chairman) |
Network Integration
This repeater will be linked to the TGIF network, providing digital voice connectivity to amateur radio operators worldwide through various talk groups and reflectors.
Equipment List
Confirmed Components
| Component | Description |
|---|---|
| MMDVM Repeater Board | Digital voice modem board |
| Raspberry Pi 5 8GB | Main controller unit |
| WPSD Software | Pi-Star derivative for digital modes |
| Motorola GM1280 Radios | Dedicated transmit and receive units |
Additional Components (TBC)
| Component | Status |
|---|---|
| Duplexer | TBC |
| Power Supply Unit | Ready |
| Antenna System | Installed and tested |
| Coaxial Cables and Connectors | Ready |
| Cooling System | TBC |
| Lightning Protection | TBC |
| Enclosure/Cabinet | TBC |
Regional Information
| ETCC Region | NORTH [NOR] |
| RSGB Region | 3 |
| ETCC Agent | Andrew Barrett, G8DOR |
Project Status
Current Status: Under Construction
We will provide regular updates on the project progress and expected completion timeline. Stay tuned for more information about this exciting addition to our local amateur radio infrastructure!
Both Motorola GM12890 radios have now been programmed and tested.
The power supplies have been cabled and tested with the radios.
The Raspberry Pi controller and modem are being set up next.
Patrons and Supporters
We’d like to acknowledge and appreciate the following for their contributions and support of this project.
Bury Radio Society G3BRS
Antony Bailey M7FGZ
David Robinson M0LMN
Ian Graham G7PAV
Alan Drury G4FZP
If you would like to support the project too, or make a contribution towards the ongoing running costs, please let us know.
Thank you.
