@buellrider97 , as a fellow Cary amp owner, which Cary amp was that?
I'm inclined to think that the culprit could be something with the preamp or the new tubes.
I understand gut feelings. As we have the same preamp, I follow your threads with interest. You have been up & running with it for quite a while now since that earlier fiasco you experienced, haven't you? I sort of remember you posting about the tubes you bought from Brent Jesse and it seems like that was a good bit ago (which obviously wouldn't eliminate them), but it sounds as if the Linlais are a fairly new addition. Maybe you are on to something with your theory, so I'll wish you luck tracking this down, but just out of curiosity, with all else aside, have you been able to form an impression of the Linlais yet?