An elderly neighbour's celining fan is being activated by a nearby amateur radio transmitter which switches it on and off. The installation is about 10 years old and I do not know how it is wired inthe ceiling. Does anybody have any suggestions as to how to cure this. It does have a pull cord inside the bathroom itself, and a timer which keeps the fan active for a period of time after it has been turned off. I'm assuming its the electronics that are picking up the radio signal.