The setting up and operating a Radio Amateur portable station. This was at Middlefield Trig pillar and was to talk to other amateurs on the Worked all Britain net on 7.160MHz
See http://wab.intermip.net/default.php for details of the WAB group

A kmz file for Google Earth : http://www.g4ght.sky-net.org.uk/Files...

A brief explanation of trigpoints: http://www.trigpointinguk.com/info/tr...
Ordnance Survey excellent reading:
https://www.ordnancesurvey.co.uk/news...
https://www.ordnancesurvey.co.uk/abou...