Hi,

I am trying to track down an intermittent noise problem, and any suggestions will be greatly appreciated.

I live in a condominium, and have an upstairs neighbor.

The intermittent noise covers the am broadcast band up through the 440 ham band.

When listening to a repeater, I can hear the noise start out at a low level, then it gets very strong and will take the local repeater completely out of my receiver for about five seconds.
The noise seems to sweep in frequency.

Unfortunately, it is very random, sometimes I won't hear it for several hours, and at other times, It is present every few minutes.

I have turned my main ac circuit breaker off with no effect, so I think the source is coming from my neighbor's condo.

Any ideas of what might be causing this?

John