Hey there, thank you in advance for any info you may be able to contribute. I have a 5e3 and I have replaced all tubes at this point. I have an intermittent noise like a quiet storm that can sometimes get pretty loud, but it doesn't happen often and it only happens when I am plugged in to the bright channel. If I have the volume up and plugged into the normal, I can hear it. Then it goes away when I turn the bright's volume back down. Wondering what could cause this kind of noise. Taken it to the shop a couple times only to be told that it is fine.... they can't find an issue. I can still use it, but it bothers me that I don't have reliable access to both channels. Any ideas? Capacitors? Thank you.