Welcome to GB7DD, the 1st DMR MotoTRBO Repeater in Scotland


GB7DD was first licensed by Ofcom on 4th March 2014 as a UHF Motorola MotoTRBO DMR Digital Voice Repeater.

GB7DD is solely owned by Martin Higgins MM0DUN and everyone is welcome to use the repeater at any time as long as you are a licensed radio amateur!  Just please ensure you disable GPS if you have that in your radio as it creates unnecessary data traffic on the network.  Also, NO DIRECT CALLS are permitted. Please also stick to the recognised Talk Groups and do not make up your own.

GB7DD operates on two digital time slots for licenced radio amateur use only;

Time Slot 1 is for World-Wide,  Europe,  UK-Wide and Local.  Direct Dial Talk Group 918 can be used by others to link into the GB7DD Talk Group 9 on Slot 1, 

Time Slot 2 is for Local and TG8 Roaming.  GB7DD’s TG8 is part of the new Scottish TG8 Roaming bundle of repeaters which currently consists of GB7DD Dundee and GB7EE Edinburgh. 

Please remember that repeaters are primarily for mobile users and you are asked not to hog the repeater or Talkgroup.  Please use the Talkgroup with the lowest number of external connections to reduce the number of repeaters being utilised by your QSO – for example don’t sit on UK-Wide if you are chatting to someone local, instead use TG9 Local.  Also, don’t sit on TG9 Local on Slot 1 for hours on end as you stop anyone else from making use of UK-Wide or World-Wide and stop Direct-Dial inwards from being accessible. Likewise sitting chatting for long periods on TG9 Local Slot 2 will stop anyone else from making use of the TG8 Dundee<->Edinburgh link.

GB7DD Coverage Map from UKRepeater.Net website

Coverage is, at this time, pretty  limited due to GB7DD being located on the outskirts of Broughty Ferry on the A92 to the east of Dundee where the ground rises to the North and West.  

A better location is desired to provide a more balanced coverage of the Dundee area. If anyone can suggest a good location to cover the most of Dundee then I would be happy to hear about it and discuss the options.

POSTED 01/10/2015

uk-wideIn respect of the TG235 Monday Night Net – MM0DUN, as GB7DD Keeper, has a duty to ensure that the GB7DD Repeater is available for local RF use first and foremost and seeing as none of the local users have expressed an interest or are participating in the Weekly Monday Night Net then the removal of Talkgroup 235 for that one hour window allows them to make use of Slot 1 of the repeater for User Activated World-Wide QSO’s or Direct Dial QSO’s. 

There is an ongoing discussion thread on the DMR SCOTLAND Facebook Group regarding the possibility of a Scottish Weekly Net being run on TG8 which links Dundee and Edinburgh DMR Repeaters.


gb3ee_textOn 15th July 2015 Allister GM7RYR submitted an NoV Application for a  DMR Repeater in Edinburgh which is known as GB7EE, the NoV was granted and licensed on 10th August 2015. 

Allister advised on 6th September 2015 that the GB7EE repeater was now fully operational.  Information on GB7EE will be posted both here and on the DMR Scotland FaceBook Page.

Please remember that all keepers welcome donations to help with the costs of funding all the kit that is required to get a repeater on-air and in some cases the ongoing broadband monthly charges.  I am sure Allister would welcome any donations to GB7EE.


So you ask, what is so special about DMR …..  well a DMR Repeater is basically like an analogue repeater but is digital and has two time slots, so basically it is like having two digital repeaters in one – on the same frequency. This means you can have two seperate conversations going on at the same time using the same repeater frequency. One local amateur can hold a QSO with someone on the World_Wide Talk Group 113/123  at the same time as another local amateur can hold a QSO with another local amateur on  Talk Group 9. This is all possible  due to the two different digital encoded time slots and the different Talk Groups; Local, Regional, National and International.

If you are interested in accessing this, the 1st DMR Repeater in Scotland, then contact me, Martin Higgins – MM0DUN, via the Contact  option above.

A good choice of DMR capable handsets in the marketplace!

You will need a DMR (not a dPMR) handset or mobile, one with a display is easier to use. You will often find 2nd hand equipment on  eBay.  There are a few Chinese made radio’s now appearing both online and via UK Sellers. I have no experience of these brands so cannot comment on build quality nor audio quality.   One handset which does seem to be popular is the Tytera MD-380 which is priced at around the £150 mark.  I have provided a menu item on this site for the free Tytera programming software and a codeplug to get users of this handset started.  You will also find codeplugs for various Motorola models available on this website too.  If you need assistance drop me an email via the Contact Us Form.

moneyA donation button has been provided on this website if you do feel like saying ‘Thanks’ for the information on this website as well as supporting GB7DD.


Martin Higgins – MM0DUN
Owner and Keeper of GB7DD


GB7DD DMR UHF Motorola Amateur Radio Repeater

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