@Al, would you repost that pic if it is handy?
a small wire in ANT2 I can see them a little bit so the external antenna is picking them
up better, to me looks like it's not generated in the shack.
One good test is to run the Flex from a 12V battery and SmartSDR on a battery powered laptop
and turn off all breakers for the house. That way you can see if it's generated by your house
equipment or the neighbors.. A test I'm going to run myself shortly.
This may be caused by a router. You probably have the same RFI signature on other bands, particularly 10 meters. To confirm, shut off the router, shut down your Flex transceiver, disconnect your computer from your network, connect the Flex directly to your computer and restart radio. See if the RFI is gone.
Similar noise on 10m in the attached picture. Sadly coming from outside my home.