Welcome to the GB7DC Multi Mode DMR, D-Star ircDDB, System Fusion & Analogue FM Repeater Webpage. The repeater went live on the air on the 27th December 2012 after a 3 year wait for the licence application to be approved. This was because 70cm is a shared band and we have to get approval from the primary user.

In March 2016 the repeater became Multi Mode and now provides DMR, DStar, System Fusion & FM capabilities all from the same repeater.

The repeater has a 30 Second Mode Hang Timer to reserve the current mode of operation. You might think the repeater isn't working because of this but actually it is just in one of the other three modes of operation only. After 30 seconds of no activity either locally or from the network will put the repeater back into Idle Standby ready for any mode.

If you require any DMR equipment to use on the repeater I can supply you the latest Motorola, Hytera & TYT Tytera DMR Radios via my company Mason Electronics.

Click Here To Visit Mason Electronics Amateur DMR Section

I can offer very good prices to local radio amateurs, users of GB7DC & can also offer advice on DMR radios & configuration for use on the local repeaters.

Please contact me directly with your enquiry & I will do my best to help you out but not in working hours unfortunalty.

 Click Here To Contact Dominic G7NPW

Repeater Specification & Hardware
Repeater Call sign	GB7DC               (Keeper Dominic G7NPW)
Location	Chaddesden Derby East Midlands. England. (Near Pentagon Island A52)
Locator	IO92GW (SK33)
Height M ASL	Approximately 70 m
TX Frequency	430.8750 MHz CC1 (For DMR Colour Code 1) (71.9Hz CTCSS for FM)
RX Frequency	438.4750 MHz CC1 (For DMR Colour Code 1) (71.9Hz CTCSS for FM)
Class of Emission	8K00G8WWN
Antenna	Omni Directional 3db @ 7m AGL
Access Methods	DSTAR RPT1  GB7DC  B    RPT2  GB7DC  G - DMR Colour Code 1
Transmitter	Tait TB7100 Slim line UHF
Receiver	Tait TB7100 Slim line UHF
Modem	STM32F446 Nucleo-64 MMDVM Modem. F0DEI Interface.
DMR Network	GB7DC is connected to the  Brandmeister UK DMR Network
DStar Network	GB7DC is connected to the ircDDB Gateway Network
Computer Hardware	Raspberry PI 4 Model B
Software	G4KLX ircDDB Gateway & MMDVMHost Software Running On Linux
Duplexer	Procom DPF 70/6N  6 Cavity UHF Duplexer & AFL Circulator/Isolator