Interfering Signal on 75M

Dave_WB1S

Anyone seen something like this annoying signal. It starts up across a good chunk of 75 Meters usually random times, runs for a while then stops for 1-5 hours. Used to be 5 seconds on 5 seconds off but lately timing changes 5 seconds on 20 seconds off. I'm located between Long Island and Connecticut. I assume this is local to my neighborhood since I have not heard any chatter about it on the band. Checked, not in my house.

VE7ATJ_Don

Hmmm... I'm wondering if it's an offending switching supply of some sort -- either a solar system in the neighbourhood or an appliance (like a fridge or freezer)?

Dave_WB1S

Thanks Don seems very low rate for a switch mode PS but maybe. Hoping someone has seen something similar. I thought possibly a sump pump but we have not had rain and basements in this area are generally dry.

Dave_WB1S

Here is another capture where you can see peak amplitude on the spectrum scope. This Flex SmartSDR pan adapter is awesome.