Just to add to this, I plugged in the toaster, the microwave oven and
several other appliances and the only thing that caused the socket to
buzz when I key the HT is the hair dryer which is on OFF (but not
reset). When I pushed the reset button with the hair dryer still off,
the socket didn't buzz. I would like to understand exactly what
internally in the socket is causing that buzz which is extremely loud.
Does anyone know? Thanks for your responses to my thread.