Macman wrote:

Strange, pulsating sounds.

That stuff has been operating around that frequency area for several
years. I'm surprised you haven't heard it before. It's an HF Ocean
Radar, which scans for surface currents, waves, and surface wind
directions can be measured through frequency analysis of the
backscattered echo from the oceansurface waves.

There are I believe, several of them operating on the East coast of the
USA, and perhaps in other areas of the world as well.

They make a mess out of 60 meters.

Steve
Holland, MI
Drake R7, R8 and R8B
"I swear by, not at, Drake receivers" ©