Wanted to have some fun and play some guitar thru my TonePort UX2 and while I was making a hi gain tone I hear this steady clicking noise. Took me a minute to figure out it was a laptop power supply (not mine) that was located about 2 feet from my guitar. This particular PSU has some awful RF. So out of curiosity I took my laptop PSU which is also 2 feet away from my guitar and put it closer to my pickups and wow this sucker is quiet compared to the other one, must be higher quality.
Hope this helps someone who has a similar problem. Oh. I had to put that clicky PSU 3 feet away from my geetar.