Engineers from Arqiva, which owns the transmitter, had to switch off the power supply to the transmitter to assess the damage to the structure.

BBC: Bath transmitter is fixed after arson attack

The Olympian, Dame Mary Peters, has been asked to turn off the analogue switch at the Divis transmitter in Belfast.

BBC: Digital Switchover

The pen works as a transmitter: When you press down to write, a switch inside the pen turns it on.

WSJ: Pen and Paper Find a Place in the Digital World