GB7PP Multimode Digital Voice UHF Repeater 

GB7PP started life as one of two D-Star digital UHF repeater in the County of Suffolk. Originally set up in January 2015 by Peter Pryke (G8HUE) with assistance from Richard Vickerstaff (M1ADT) on the software side of the repeater. GB7PP operated in Ipswich with coverage to the town. 

In early July 2016 Peter discussed transferring the repeater ownership to me along with relocating the repeater.

On the 22nd July 2016 Ofcom issued me with the NoV transferring repeater keeper status to me. On the 9th November 2016 the NoV which enabled the move of GB7PP to Mendlesham, Mid-Suffolk in an attempt to increase it coverage across the County, was granted.

To help with the connectivity I had been assisted by Mark Jaggard (2E0TNG) who also donated the gateway computer.

On Sunday 28th May 2017 GB7PP went live following a change of software to ircDDB Gateway, skillfully configured by Mark Taylor (G0LGJ).

On 14th October 2017 a further application was submitted to the RSGB and Ofcom to enable digital multimode access using D-Star, Yaesu Fusion and DMR. The NoV was granted just 4 days later making GB7PP the first multimode digital repeater in Suffolk. Changes to the transmitter/receiver, software and interface are taking place to enable users to use all modes of access.

In February 2019 two Motorola GM350 UHF radios were purchased along with new computer hardware to interface the radios to the digital networks. Pi-Star was chosen, as the software offered the greatest flexibility for the new repeater. Both Motorola radios were programmed by James Large (G7MLO)

GB7PP Coverage map

To zoom on map click to open in new screen.

GB7PP Frequency Settings

Channel: DVU35

Input: 430.4375 MHz

Output: 439.4375 MHz

Output Power: 14 Watts (10 Watts ERP)

Modes: D-Star, DMR, C4FM/System Fusion and WiresX connectivity. GB7PP is not licenced or configured for analogue TX/RX

Gateway Controller: STM32-DVM-USB MMDVM interface (N3XCC)

UHF DV Repeater: 2x Motorola GM350 (128 channel version)

Software: Pi-Star (MW0MWZ) & MMDVMhost (DG9VH)

Gateway Server: Raspberry Pi 3 B+

Internet connection: Origin Fibre Broadband - 40Mb on BT Infrastructure

GMSK Remote Switch : Belkin WeMo

Antenna: Diamond X-50N Vertical Collinear (+7.2dB)

Antenna Height: 10 meters AGL

Duplexer: Procom 6 Cavity UHF (-1db)

Band Pass Filter: Procom BPF 70/3 on TX line (-1db)

D-Star Radio Settings to Access GB7PP

YOUR: CQCQCQ

RPT1: GB7PP**B (* Indicates space)

RPT2: GB7PP**G (* Indicates space)

MYCALL: (Your own callsign)

You RX: 439.4375 MHz

You TX: 430.4375 MHz

Reflector: GB7PP has no default reflector. Once connected the reflector will remain connected while there is active Tx on D-Star into the repeater. (auto disconnect 15 minutes of Tx inactivity).

Note there is an 8 second hang time which keeps the mode engaged after end of last transmission. After this time the repeater will resume scanning all modes.

If you are unable to access the repeater please check your signal meter as it may be transmitting in one of the other digital modes.

You must be registered with the D-Star network to gain access.

Click on this Icom UK link to register.

Additional D-Star and CCS codes can be requested from Ham-digital.com You will be asked to upload a copy of your licence documents.

DMR Radio Settings to Access GB7PP

COLOUR CODE: 1

Network: Phoenix (OpenDMR)

You RX: 439.4375 MHz

You TX: 430.4375 MHz

GB7PP has the following operational Talk Groups using two Time Slots.

Time Slot 1

Talk Group 9 Local

Talk Group 1 Worldwide

Talk Group 2 Europe

Talk Group 13 Worldwide (English speaking) *

Talk Group 113 Worldwide (user activated) *

Talk Group 119 Worldwide (user activated) *

Talk Group 123 Worldwide (user activated) *

Talk Group 129 Worldwide (user activated) *

Talk Group 235 UK wide

Talk Group 80 (user activated)

Talk Group 81 (user activated)

Talk Group 82 (user activated)

Talk Group 83 (user activated)

Talk Group 84 (user activated)

Time Slot 2

Talk Group 9 local (Center of local activity)

Talk Group 840 Roaming (Linking all East Anglian Phoenix DMR repeaters

* Once contact has been established on one of these Talk Groups please move to a user activated Talk Group. This keeps the worldwide Talk Groups unblocked.

User Activated - these remain dormant until the user of GB7PP opens them up (by keying the mic) and then remain open for 10 minutes if not used again.

Note there is an 8 second hang time which keeps the mode engaged after end of last transmission. After this time the repeater will resume scanning all modes.

If you are unable to access the repeater please check your signal meter as it may be transmitting in one of the other digital modes.

C4FM/System Fusion Radio Settings to Access GB7PP

You RX: 439.4375 MHz

You TX: 430.4375 MHz

GB7PP has WiresX connectivity.

Reflector: GB7PP has no default reflector. Once connected the reflector will remain           connected while there is active Tx on System Fusion into the repeater. 

           (auto disconnect 15 minutes of Tx inactivity).

Note there is an 8 second hang time which keeps the mode engaged after end of last transmission. After this time the repeater will resume scanning all modes.

If you are unable to access the repeater please check your signal meter as it may be transmitting in one of the other digital modes.