I've got the hum in different rooms in my appartment, meaning different fuses, excluding a hypothesis about the power just where I'm sitting.
I've also been over the fact that I'm using socketsavers, but the pins on them look 100% like the ones on my tubes, and I never intended to use anything but the approved tubes for the Lyr.
I'm just gonna send it back tomorrow - at least I've got the original packaging so shipping won't be too hard. It will just suck because it'll take a while and shipping from Norway is silly expensive. UPS quoted me 350 usd to ship it to Schiit. The norwegian postal service is cheaper at around 100-150 usd. Let's just hope it's a guarantee-issue and not me having screwed up something (even though I still cant see how I would have done that, using both approved socketsavers and tubes + having had the amp run great for 75ish hours). I'ts probably just bad luck, and that's just how life is some times
Cheers for all your input, and I refuse to say anything bad about Schiit despite all of this. They're sporting GREAT service, and I really appreciate it. I really wish I had a store I could go to and cry / yell, but Europe / Norway is so tiny it just doesn't add up anyways, so back it goes tomorrow
Just to be clear on the volume knob - I can clearly see the whole for a screw, but I can't with my bare eyes SEE the screw, even when using a flashlight. I can see "something" deep down in the screw-hole. Could that be it? I've sort of packed the amp into its box, taken out the tubes and packed it all up now tho. That, plus the amp DID make weird noises and DID lose sound on one channel earlier today - which I really doubt could be because of the volume-knob. Also, it's been working flawlessly for 50ish hours so far, without any hum, with my hand on the knob or not.
Meh, I'll just ship it back tomorrow and wait for it to get back to me :/