12au7 tube?

It's quite concerning hearing about the quality issues at Psvane. Grant Fidelity (premiumvaccumtubes.com) dropped them due to quality concerns/issues and are selling Linlai only.

This makes it really difficult to find good 845 tubes for a future tube upgrade... As far as I know, of new tubes, there's only Psvane, Linlai and KR making them (and KR doesn't follow the standard, so they're out).

@curiousjim , 

Have you ever bought problematic tubes from Viva and not been taken care of by them?

I’m asking because they always take care of their customers, at least in my experience.

@curiousjim ,

Gotcha, I was under the impression that you didn’t get the tubes from them.

I settled on Radiotechnique in my Backert preamp. I thought they were made by Mazda but perhaps I'm wrong.  They just edge out the Cifte's that I also have and which I'm pretty sure were made by Mazda.

Amperex is great too: a tad warmer, whereas Radiotechnique gives you a little more "air".

I didn't get on well with Brimars because of reliability problems but perhaps that was just bad luck.

I tried a pair of Psvane ART series a while ago and thought them the best of new production that I tried (Mullard and Gold Lion), but prefer NOS.  No problems with the Psvane but two tubes in a preamp for not too long is hardly a representative sample.

Question: has anyone tried the Apos Ray 12AU7, which seems to be the new kid on the block making a few waves.