GB7CH… It’s Alive!

As of 7th Dec 2020, a new signal was present on 70 cms band with the arrival of GB7CH, a new multimode digital repeater for South East Essex and East London.

Originally installed at Kelvedon Hatch Secret Nuclear Bunker by George Smart M1GEO and designated GB7KH, it has been repurposed to provide a better coverage for those in the footprint of the coverage centred on Tomswood Hill in Hainault on the edge of Chigwell in Essex.

Please check on the Technical page for all the blurb, and status updates will be posted on here and any news about development work which is going to take place.

When using dynamic talk groups / rooms / etc, please release them after use
Brandmeister DMR: Please key TG 4000 to reset
YSF: Please check your radio manual or if you have a DTMF mic, try pressing the star button.
D-Star: Unlink from reflector as per your radios instructions.


The repeater is currently in a commissioning and extended test phase so please bear in mind that it will be subject to occasional reboots or downtime as things are modified and hopefully improved.

The plan is to continue to offer all three popular modes of: DMR (Brandmeister) Yaesu Fusion and D-Star unless there any issues that require the service to be pared back.

3 thoughts on “GB7CH… It’s Alive!

  1. Hi ,
    It’s good to know the repeaters will be back in action soon.
    I actually supplied at least one of the GM340 PMR radios to George Smart for hooking up the GB7KH setup. Glad not all was in vain. I used to work as a PMR radio engineer just around the corner from the new location on the Hainault industrial estate (business now closed and defunct).
    Having retired several years back I now only have some basic kit in home shack (Motorola DM3600, + Alinco FTM100D Dual bander). Normally work thru GB3DA and also listen on other repeaters via a dual band and a home made slim jim.
    Take care ….stay safe.
    Regards,
    Howard (G8DXV)

    • Hi Howard, I know exactly where you used to work.. I think they still had the business name boards up until a few years ago.

      I hope you are enjoying your retirement and can now enjoy radio as a hobby! The DM340’s are working a treat. i think George said the one that is being used for RX actually had low transmit output, but that is not an issue.

      I tried to buy some second hand radios before these came up for sale from George and I have to say everyone wants silly money for them now!

  2. Very nice to have close by looks like i have got to dust off the old Yaesu

    Many thanks for the service you provide

    Chris {M3OLV}

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