I was using a few turns of wire as a probe for EMC testing and accidentally came across some FT8 on 3.573 MHz. It was audible even over the noise from some ethernet and computers. I also noticed it audibly even when very quiet and covered by fan / disk noise.

A picture of River MacLeod.

River is a humanoid based on the planet Earth. It likes computering, adventures through time and space, and being a cat.