On Oct 9, 11:20 am, Bert Hyman wrote:

Even though nothing new has been introduced into the house, I went
through the exercise of unplugging or turning things off, but the signal
remains.

Anybody else hearing it, or is it something local?

Your signal strength variations argue against it, but is there a
possibility that your calibrator is turned on?

- 73 de Mike N3LI