GB3JB - 2m Analogue FM - RV63 - 145.7875 Mhz - 145.1875 Mhz - 103.5 hz ctcss.
GB7JB - 70cm DMR - DVU37 - 439.4625 Mhz - 430.4625 Mhz - Colour Code 1 - Slot 1 "Local" TG9 - Slot 2 "SW Cluster" TG950

GB3JB 2m

The actual repeater assemble is as show below.

It consists of a much modified FT8900r, which acts as the receiver, and a slightly modified FT2600m, which is rated at 60 watts, that acts as the transmitter.

Below, is the new schematic which, if everything goes to plan, reflects the actual re-configured system as of March 2015.

The four solar panels were new last spring.  Each is comprised of 72 cells, in a 6 x 12 array, measuring 1.6m x 0.9m.

Two are rated at 250 watts peak and two at 190 watts peak.

The nominal full load output voltage is 35 volts dc.

As will hopefully be appreciated, 880 watts worth of power at 35 volts D.C., can give you quite a shock.  These types of panel are not to be played with.  Hence they are mounted high up on the tower, well above the anti-climbing panels, the anti-climbing paint, and the barb wire.

To give some idea of scale, the picture below is of a single panel of the same dimensions, with the late Clem G3UGR.

The change to only using solar panels, reflects a significant problems we have faced at the site with various turbines just NOT being engineered well enough.

Typically the weak areas seem to be associated with the bearings and/or the manner in which the blades are attached to the shaft.

As will be appreciated, the site is now totally reliant on Solar Energy.

With regard to the future power loading of adding GB7JB and GB3WX.  The plan is that additional battery capacity will be added, as and when required by the additional repeater installations.

The other major site change is of course, the replacement of 2" mast with a two section, free standing, Rasmussen, steel lattice tower.

GB3JB Coverage

Below is the coverage Map, produced by ETCC at the time of the application for an NoV, in the Summer of 2007.  This indicates the predicted coverage for GB3JB.

The map below was produced by G3ZXX on 6th January 2010, using a different predictive software, to that used by ETCC.

The GREEN shading indicates the areas in which a mobile station should theoretically be able to use GB3JB 95% of the time.

The PURPLE shading indicated the areas where the GB3JB signal will be -12dB compared with that of the GREEN areas.

As can be seen from the two predictive maps above, the anticipated coverage is very similar.

Since it's activation in November 2007, the predicted coverages appears to have been borne out.

This page last updated: 29th March 2015 @ 1700 UTC.