Welcome to GB7DD, the 1st DMR MotoTRBO Repeater in Scotland
GB7DD is an Ofcom Licenced UHF Motorola MotoTRBO DMR Digital Voice Repeater which 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. Currently GB7DD’s TG8 is part of the West Yorkshire TG8 Roaming bundle of repeaters.
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.
Everyone is welcome to use GB7DD 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.
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.
You will need at least a Motorola DP3400 or a DP3600 Handset. Prices vary from £100 to £300. 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 to consider is the Hytera PD365 which is an ultra-compact 3 watt digital and analogue UHF handset (pictured on the far left of the row of handsets pictured above). This handset performs very well and is priced at under £200! and has the added benefit of you being able to use it on existing analogue repeaters or simplex too.
Check the BUY page on this website as I often have some second-hand DMR handsets or DMR mobiles available for you to purchase. If you just want to get a better understanding of DMR then drop me a line using the Contact form.
A 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