The true summit is not the part with the masts on, it is to the west, across a bit of boggy ground that is below the 25m limit of the activation area.
Brown Carrick Hill masts today
The masts in 2009 when I was last here
Some of the antennas have gone from the masts, all the emergency services have now moved to TETRA (the 4-stack dipoles with extra supports). DAB antennas are on the most distant of the 3 masts.This ship was just off Ayr