X-Lite Pro High pitch noise when plugged in

[troyle]

Hello,

Noob here so be kind

I recently got a X-Lite Pro and so far so good, it seems super awesome!
The only problem/annoyance I have with it is that there is an extremely high pitch whine when I plug in the usb cable with the radio turned on (To use as a USB controller for sim software).

It happens in 2 conditions:
- Radio is on and USB is plugged in
- USB is plugged in and power button is held (Does not turn on the radio, but noise happens until I let go of the button)

Has anyone else had this?
Is my unit defective?
Will it soon explode?

Thanks for the info,
troyle

[MikeB]

Do you still hear the whine if the volume is turned right down?

Mike

[Kilrah]

The USB charge circuit can make a hiss depending on what it's connected to...

[troyle]

Thanks for the responses.

@MikeB, the hiss does not change based on volume.

@Kilrah, it seems you are correct, the noise changes in pitch based on what USB connection I am using. If I plug direct into the IO of my PC, the noise goes away!
Still is quite annoying though :/

Thanks again,
Troyle