Does anyone have a RV parked close by? If it is plugged in, the chargers on them are terrible. Lots of noise. Just cruise through a RV park with your HF gear running in your vehicle. S9+15 noise.....
Some folks also have solar on their RV to keep batteries topped off. If they are using an MPPT controller, you'll know it.
Another culprit I recently ran into was a Cisco POE Ethernet Switch. I bought two of these to power my POE security cameras. Terrible noise generators. I couldn't quiet them down much at all and gave up. I have since sold them on Ebay and replaced them with NetGear POE Switches. Although they aren't perfect, I have been able to clean them up enough to no longer be an issue.
Noise and HOAs are taking some of the enjoyment out of this hobby......
Norm - W7CK
Yeah I had one, we've moved... DC pumps are the worst.
Ferrite beads removed 95% Eric, thanks for the reminder! :) Now to chase down that last bit......
I guess we can get complacent sometimes and forget the obvious. All of this gear was working just fine with the Flex 5000a & Yaesu analog radios before the 6400M came on board.