Please click HERE to go to our NEW web site.

These pages are no longer being updated.

Please also note that the "Contact Us" e-mail address, shown here is no longer available.


SITE LAST UPDATED ON: Thursday, 12/03/2015 @ 01:37 UTC.

DVU37 - Output 439.4625 MHz - Input 430.4625 MHz.

GB7JB is funded solely by donations from its' users and supporters. There is no club or group to join and no annual membership fee. We rely totally on your good will.

The system is located in South Wiltshire, in IO81vc, co-sited with GB3JB, and provides coverage across South Wiltshire, South Somerset and North Dorset.

GB7JB is a 70 cm Digital voice repeater, based on DMR TDMA Mototrbo technology.
It provides TWO simultaneous channels. One is for local chatting, whilst the other is connected to the Regional Cluster / Network.

Wednesday, 1 April 2015

New Web Site ....

Hi All.

There is a NEW "JB" web site.

It combines data from this and the previous GB3JB web site, plus additional information and resources.

On the NEW site you will find all the relevant information relating to "JB" Repeaters, as well as other repeaters and beacons that are installed at the "JB" site.

The new site also includes information relating to the 70cm SW Cluster and DMR technology.

This site, along with the original GB3JB site will continue to run in parallel for the next couple of weeks, so as to give individuals time to make the change to their links / favourites etc.

A further very significant change is the closure of the original e-mail contact addresses: gb3jb.repeater@gmail.comand

These addresses have been closed for the purposes of communication, as a result of the significant amount of SPAM mail that has started to arrive, over the last couple of months.

Any communications sent to either of the above address, will be automatically deleted by the e-mail server, upon arrival.

These original e-mail addresses are now only valid for the purpose of making donations, to the relevant repeaters PayPal account.

You will note that there is now a "Contact Us" page, associated with the NEW web sites Navigation. This page contains a Form, for communicating with either myself or the Treasurer.

"Blanket" update e-mails will still be sent out, as previously, but unless specifically specified, they will be from a "NOREPLY" e-mail address, but will include a link to the "Contact Us" form.

Any communications sent to the "NOREPLY" address, will also be automatically deleted by the e-mail server, upon arrival.

This change may be inconvenient to some, but not as inconvenient has having to filter all the JUNK that has started to appear in the repeater in boxes.

Please feel free to make any constructive comments via the "Contact Us" form.

Please only use the NEW web site, from now onward.

Cheers & 73's
Dave, G3ZXX.

Thursday, 12 March 2015

GB7JB Operational.

Hi All,

GB7JB, became operational at approx., 4pm local time today, 11th March 2015.

It is running at full ERP into the planned antenna, which is currently in a temporary position, approx., 15 feet agl.  The site being approx., 745 feet asl.

We are awaiting the final installation of the antenna on the tower.  I will of course keep you up to date with developments.

Signal strength and activity reports will be much appreciated, via:

The operational characteristics are as follows:
  • Channel / Frequency:  DVU37 - Output 439.4625 Mhz - Input 430.4625 Mhz
  • Mode:  DMR - TDMA
  • Slot 1: Local Coverage - Talk Group 9 - Colour Code 1
  • Slot 2: Regional Cluster - Talk Group 950 - Colour Code 1

The Regional Cluster also includes GB7AA, GB7BS, GB7DR, GB7SD.  All 5 repeaters are inter-linked.

To the left of this posting, you will see computer predicted coverage maps for both GB7JB and the Regional Cluster.

I would like to convey my thanks to all the individuals and clubs, that so willingly donated towards the GB7JB project, as well as those who have provided both technical and moral support.  GB7JB is on air thanks to your enthusiastic support and encouragement.

Thank you.

We still have a little way to go, but I think I can safely say, we are 90% there.

As some of you will know, I have been slowly upgrading the site CCTV system.  This is now more or less complete, with an additional 4 cameras and an upgraded storage / live audio and video streaming system having been installed.

This work is being carried out in conjunction with the site owner, who is spending a not inconsiderable amount on upgrading the facility, to include new structural security measures.

Cheers & 73's
Dave, G3ZXX.