No.
Does that mean there’s nothing different, or you just don’t know? 
I’ve noticed this issue on mine (UHK 80 with batteries included) regardless if plugged in; however, the noise is barely audible if either the bridge cable is removed, the device is plugged in on the left side, or the device is unplugged entirely.
2 Likes
I would guess the middle component is a transistor, based on its shape. I would need to look up it’s markings to be sure, and I cannot read the markings in the photo. This (https://www.reddit.com/r/electronics/comments/1m2hr3/why_do_transistors_make_noise_ie_why_do_they/) might be relevant. Double-check my guess before you act on this, if you’re going to. I am far from an expert on electronics.
The recommended solution here is to increase PWM frequency above audible range, when possible, so it might be fixable with a firmware update. This fits, given that the LEDs are likely PWM modulated and the noise seems (from posts I have read) to be LED brightness related.
I wonder if alternate parts would produce a different noise profile?
1 Like
Don’t know.
1 Like
I’m looking into it. I hope we get some information from the creators be I definitely want it fully fixed, preferably for all users but defenetly for all users who own a uhk6 and maybe even for uhk80 enjoyer.
1 Like