Telford & District Amateur Radio society

Forthcoming Events
July 2016
2-3 VHF Field Day from IO82NN

6    Committee Meeting & GX3ZME on the air

New Foundation Training Course Announced please click here for more information

location information

Our new website is still under construction however please feel free to look around. 

Information still to be added and content to be finalised.

TDARS meeting video  22/06/16 Learning how to DF Hunt!!




GB3TF – the Telford repeater goes C4FM

The new Yaesu Fusion Repeater for GB3TF became operational on Wednesday 6th January 2016, ten years (to the day) after the previous Tait equipment was installed, and 24 years (almost to the day) since GB3TF first became operational at its old QTH in Dawley Bank in 1992 using Pye equipment. After a few initial ‗wobblies‘, ‘TF is working well. Users seem to have adapted quickly to the non-existent ‗pips‘, and rapid carrier cuts at the end of an ‗over‘.

Its auto-ID is currently set at 10 minutes, and the logic is set to ‘auto/auto‘, which effectively means analogue FM IN gives FM OUT, and C4FM (digital) IN gives C4FM OUT. In addition to requiring 103.5Hz CTCSS on transmit to access the Repeater, many users have set their radios to only open their squelch from the reciprocal 103.5 CTCSS sub-audible tone transmit-ted by the Repeater. This reduces the annoyance of a digital (C4FM) signal (loud white noise) being heard on an FM-only rig.

The old 1750Hz access tone no longer works on ‗TF, so CTCSS is now essential. Receive sensitivity has more than doubled with extra filtering now fitted to ‘TF on both the receive and transmit ports. Put another way, GB3TF has a far wider ‗footprint‘ and is far more accessible in all directions. It is interesting to note that GB3LH (Shrewsbury), GB3VM and GB3VN (Ludlow) now all use Fusion Repeaters, so it is a County wide system, with several others opening up across the Midlands. Best of all, whether you want to go digital (Yaesu way!) or stick with your faithful FM gear, the choice is yours on ‗TF.


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