An unknown noise source has popped up on my NW Beverage, and my transmit vertical to a lesser extent. This noise is loud on both 160 and 80, and makes it impossible for me to hear stations in Europe. I believe I heard a similar noise for about a month, but not quite strong, a few months ago. My NW Beverage is normally my quietest antenna with a S0 noise floor.
This noise varies from S9 to S9+30dB on my Beverage. Recorded in AM mode, 5Khz bandwidth, on my K3.
I drove around the housing area and located one extinguished sodium street lamp that was putting out a strong 60 cycle hum. The crackling sound I could hear everywhere, even a mile away from my house, on the AM radio in my car.