Hi,
In the first of the pages I’d found it said….
“In later years Chris discovered that when the Canewdon Jamming transmitter was shut down it was moved to Orfordness in Suffolk another old Radar site and home of the BBC world service and FCO communications. Over the subsequent years the transmitter was gradually broken up for parts”
Except for the transmitters sitting on the sea bed or weren’t scrapped along with the ship the rest seems to have been used for a few years in parts of the world where they needed a second-hand AM transmitter - as you do
I suppose quite a few were eventually cannibalized as per the one at Orfordness for spares keep their kin on air. As to how many are still in use its hard to know.
Terry