Ringing Sound In Tube Gear


I recently have begun noticing a feint "ringing" sound while playing my Onix H34 integrated. It comes and goes and I'm sure it's not my ears. Could this be a problem with the output tubes? Any advice would be helpful. Thanks
128x128tarraga
Be very careful and diligent with precious tubes...isolate them from harsh vibration and nurture them like sweet little gentle babies. Be nice to them. Except for the tubes in the 147 guitar and bass amps I've dragged all over the world since 1967.
Thank you for all the input (no pun intended). I will follow up with pencil test and dampers and let you all know the results. BTW: This is what I love about Audiogone we are a community which can rely on the knowledge, experience and good will of each other. Thanks!
"we are a community which can rely on the knowledge, experience and good will of each other."

Are you sure you are in the right place?
Hah! Good luck Tarraga...hopefully the knowledge experience and good will...will prevail and your ring will be sorted out. Good luck...and remember - sometimes when you tap on output tubes...be careful. If the tube is causing a problem even the gentlest tap will be quite loud thru your speakers. On the other hand, if not, a gentle tap should not result in any noise coming thru. If you use a pencil, use the eraser part...you dont need to tap with the wooden/lead part at all.
Hmmm the tapping (gentle w/eraser)produced no major noise during tests, but the ringing seems to have abated for now. I may try tube dampers anyway as the amp I have in another system came with them already installed on the tubes (it sounds great, btw) and it seems like a good idea.