On Monday, February 24, 2014 4:45:03 PM UTC, DerbyBorn wrote:
I used to have a separate doorbell transformer. During some kitchen work
the electrician fitted a new transformer inside the consumer unit. I can
now hear a (50Hz)buzz in the bedroom above.
At the moment I am not fit enough to do any streching to try relocating it
or trying to mechanically isolate it. I am wondering it an electronic
voltage reduction device is available that could be smaller and not liable
to vibrate.
The door bell - is a load buzzer.

Old copper & iron transformers are by far the most reliable, and seldom buzz. Buzz can often be cured by hammering on the edges of the laminations, or pouring a thin varnish/resin into the slight gaps between laminations. Your best bet new is another of the same type.


NT