Welcome to the Amersham and Tring Repeater Group

Amersham site IO91QP

  • GB3AM Repeater output 50.840 MHz, input 51.340MHz, CTCSS C 77Hz .
  • GB3AL  Repeater output 145.7375 MHz, input 145.1375 MHz, FM CTCSS C 77Hz
  • GB3AU Repeater output 433.175 MHz, input 434.775 MHz, CTCSS D 82.5Hz
  • GB7AU Repeater output 439.700 MHz, input 430.700 MHz, D-Star (local only)
  • GB7WL Repeater output 439.4625 MHz, input 430.4625 MHz, colour code 3, DMR (Phoenix Network)
  • MB7AM Echolink node 70.26 MHz AM, Off Air

Tring site IO91PS

  • GB3TU Repeater output 433.225 MHz, Input 434.825 MHz, CTCSS C 77Hz
  • GB7CT Repeater output 145.6375 MHz, input 145.0375 MHz, colour code 3, DMR (Phoenix Network)
  • MB7FM Simplex 70.4375 MHz CTCSS C 77Hz required, please NOTE it currently has a 60 second time out
  • GB3BAA Beacon 50.016 MHz vertical polarization
  • GB3BAA Beacon 70.016 MHz horizontal polarization off air


  • 25 October 2022: GB3BAA:- 6 Meter beacon back on air.
  • 12 November 2021 70cm GB3TU back on air

Repeater Group

  • Rob M0ZPU NoV holder for Amersham and Tring repaeaters
  • Rob M0ZPU Digital repeater support for Tring
  • Jon G4MDC and John G3VHH Amersham and Tring Analogue repeater support
  • Chris 2E0UCW and Eric G6FGY Amersham Digital repeater support

Thanks to

  • General John G8SYD for donating a router for Amersham, Paul G7KBR for donating a spare router for each site and Vic G0RAS for providing the router/SIM for Tring.
  • GB7WL – Eric G6FGY for providing the funding, Rob M0ZPU for donating the radios, Paul G7KBR for building the repeater & Chris 2E0UCW for doing the logistics/installation.
  • GB7AU – Paul G7KBR for building the repeater & Chris 2E0UCW for providing the funding, logistics and installation.
  • GB3AL – Chris G0WTZ / Chris 2E0UCW for funding the dual mode repeater and Paul G7KBR for building the repeater.


Donations towards the site fee’s, equipment and 4G internet are always welcome – you will find a PayPal button on the top right of the website where you can send a once off or monthly donation to the group. A PayPal account is not required to send a donation – there is an option to use a card.


Our web site name is derived from the frequency of the sub-audible tone (CTCSS) that is used for the analogue repeaters of 77Hz Note (GB3AU) is 82.5Hz to avoid interference from other repeaters.

Some useful links

UK Repeaters
Phoenix (DVSPh) Network
Yaesu System Fusion
YSF Reflector List
YSF FSC Reflector List

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