Talk:Pontop Pike transmitting station

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How heigh is the mast? It is surely not 450 metres high! The value 450 metres corresponds surely not to its height above ground level!

I checked and the 450m refers to its height above the Ordnance Survey datum (sea level). --Tony Sidaway|Talk 11:56, 1 Jun 2005 (UTC)

How heigh is the mast about ground level?

According to http://dspace.dial.pipex.com/town/pipexdsl/r/arar93/mds975/txmaps/northumberland.html the basement of the mast is 305 metres about sea level. Because the antennas are 450 metres about sea level, the mast is 145 metres high!