It sounded like the noise was coming from the inside Schumacher, but I could feel the buzzing in my fingers as I closed the snap on ferrite.
I have the powerpole only 5 inches from the schumacher and the ferrite within that space so it is not so easy to tell exactly where the noise was coming from.
The buzzing it too loud to deal with. It is easily heard over a computer fan rated at 37dba
Snowman9000, thanks for the report on the Turnigy. I was very bummed that on a regular load the Windynation 8awg Wattmeter readings were so far adrift from the other wattmeters and my battery monitor.
It also froze up a couple times.