tschoelen wrote:I'm having issues with 1/3 of my poe+ hats. It has a horrible coil whine. I'm only plugging it into my POE switch. I am not using the USB-c Power cable.
Replacing the hardware won’t guarantee less whine. The noise is caused by microscopic movement of the wire in the transformer as current flows through it. No matter how tightly a coil is wound, there’s always some flex.
If you got the POE Hat within the last 30 days you can return it, but you’ll have to pay the return shipping.
Send a note containing a link to this thread and your order number to support@adafruit.com. The folks there will help you.