The repeater
GB7HH is a multimode digital repeater in Romford, covering London, Essex and North Kent. It runs D-Star, DMR and Yaesu Fusion, though most traffic is DMR.
- Output (TX)
- 439.7500 MHz
- Input (RX)
- 430.7500 MHz
- Colour code
- 3
- DMR ID
- 235226
- Locator
- JO01CN
Equipment
| Radio | Motorola |
|---|---|
| Modem | MMDVM RB_STM32 |
| Antenna | Diamond X50-N, 38 m above ground level |
| ERP | 14 dBW |
| Channel | DVU60 |
| RX preamp | Built and tested by George, M1GEO |
| TX filter | Additional filter tuned by George, M1GEO |
Coverage
From a handheld, GB7HH reaches across East London and into the centre, out through Romford and Brentwood, and south through Bexley and Bromley. From a mobile it goes considerably further: north into Essex towards Chelmsford and Harlow, east down the estuary past Basildon towards Southend, and south into Kent towards Maidstone.
The RSGB publishes a terrain-based coverage prediction for GB7HH at ukrepeater.net, showing handportable and mobile footprints separately. Treat it as a prediction rather than a promise, as they say themselves.
Reception reports are welcome, especially from the fringes. If you can hear the repeater from somewhere unexpected, or you cannot hear it from somewhere you think you should, let me know.
Networks
On DMR, both DVSPH and BrandMeister run across both timeslots. The how to use page has the full talkgroup layout.
D-Star runs on module B, currently connected to XLX672 E. Fusion is enabled but not linked to a reflector, so it works locally only. The repeater dashboard shows the current link state for every mode.
The ETCC record for GB7HH, including its Notice of Variation status, is at ukrepeater.net.
The repeater is also visible on the XLXLEF dashboard and has its own Pi-Star dashboard.