Yes, they probably did swap the tubes. I let my good friend and member here borrow my V2 a couple of times and he had no issues with any noise/buzz/hum so I do not know, it is puzzling and frustrating.

Yes, they probably did swap the tubes. I let my good friend and member here borrow my V2 a couple of times and he had no issues with any noise/buzz/hum so I do not know, it is puzzling and frustrating.

Ah yes ofcourse, i take it shorting the inputs didn't work then? Either way i'm sure shiit or someone around here can help you further. I'm not nearly as knowledgeable as some people around here...

I thought I had my mystery buzzing/humming from my Valhalla 2 figured out (thought it was my Son's old big tube television upstairs in his room, right above where the V2 sits. When I unplug his TV, the buzz/hum went away for a while so I thought that was the cause for the buzz/hum/interference. But since, it has come back but I noticed something peculiar. On the High/Low gain switch if it is set to low, the hum is hardly noticeable, when it is set to high gain, the buzz/hum is pretty loud. Anyway, what I noticed was if I touch the gain switch with my finger, even on high gain, the buzz quiets down a bit.

Does this sound like a grounding issue? Am I going to have to give in a get a ground loop eliminator? Or does anyone else have any ideas? I hate to spend $60 or $70 on a ground loop/buzz eliminator if I can avoid it.

Thank you for any suggestions and/or ideas.

Yes, if I disconnect everything except the headphones and power cord (So basically the RCA cables) - I get the buzzing. There is no buzzing humming coming from the unit itself, only through the headphones.