Newbie hit it pretty much right off.
I've had noise on SS systems, running them single ended. I've even had some noise on Ss going XLR. the former interface being the more noiseier of the two.
In combo rig, Tube + SS amp, single ended only, there was a bit more noise than all single ended Ss gear would produce.
None of the aforementioned systems did however produce enough hiss or fuzz to be noticeable at less than enormous listening levels in between the tracks.
I'd have to get up and get close to the speakers to notice it... and turn up the volume while I was very close to the speakers. XLR is/was the quietest. All SS came in second. hs + SS was third... and the noisest was all tubes runing SE.
Again, I still can't hear even the loudest (all tubes) from my listening chair. I gotta get within a couple feet of the speakers with the volume up to hear the hiss.
Two things fixed or made it better... the phono line tubes, and power conditioning. A third item helped but in a much lesser degree... tube rings... oddly enough. They helped imaging too.
As was said, it only takes one to make things irritating. give Andy at Vintage Tubes a call.