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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.

Sunday, 17 November 2013

GB7JB is the proposed NEW 70cm DMR digital voice repeater to be co-sited with GB3JB the 2m analogue voice repeater, at Willoughby Hedge, south Wiltshire.

The anticipated mobile coverage is perceived to be similar to the ETCC projected coverage map, shown below.

However, the ETCC map assumes unity gain antennas on the vehicle.

As will be appreciated, most amateurs have dual band VHF/UHF antennas associated with their 2m and 70cm mobile installations.

These antennas typically have significantly more gain on 70cm, than unity.

Therefore the mobile coverage achieved by the typical mobile set-up, may well be better than that implied by the ETCC map.

Coverage for fixed home based stations is anticipated to encompass most of central and parts of North Wiltshire, parts of Southern Dorset and West Hampshire, plus parts of North and West Somerset.

At this time, it is anticipated that like GB3JB, GB7JB will be funded solely by donations, from its users and supporters.

To find out more about GB7JB, or to get involved with this cutting edge project, contact us via a click here.

To find out more about the DMR Amateur Radio network and repeaters, click here.

To find out more about DMR technology, click here.

To visit the ETCC page relating to the GB7JB project, click here.

The South Dorset Repeater Group, have also made an application to establish a 70cm Digital Voice DMR repeater, GB7SD.

It is highly likely that these two project will progress at about the same speed through the system, and that the individuals involved with each project will be working very closely with each other.

Cheers & 73's
Dave, G3ZXX.