[morzh]

Today I took my small pocket transistor radio (the antenna of course is the ferrite type so it is highly directional) and heard this buzz when tuned to this very station (and none when tuned to others) in only particular direction, where it becomes extremely pronounced. The buzz exists everywhere in the house.

Because now I could move freely around and keep listening to the buzz, I verified the effect of all the loads in the house (well, the lights) and I saw that the only load that totally kills the buzz is that lobby fixture - once the switch is flipped the buzz disappears. The other loads have zero effect.

I do not want to go into the distribution box while I am alone in the house, but maybe I should try to flip the breaker that controls that part of the wiring and see if it still persists, and maybe then try to tighten the bolts.

And I just thought of something: this is the only hanging fixture in the house and it has a long vertical wire coming down. I have a feeling that there is some nice loop formed in the wiring that eventually leads to it.


PS. I turned the breaker off that is responsible for the lobby fixture and the buzz went away.
Yep, will try to tighten that one.