I would like to add a few comments here as well. I have to agree with Charles's assessment of the Emission Labs 300BXLS as I have had a pair for 3 years now that have been used extensively and have never so much as given a glitch. They also sound absolutely sublime, and in the testing of many different 300B tubes, I find them to be the best of the lot in terms of the true 300B sound. I liked them so much that I purchased another pair to use in both a push-pull and PSET amplifier. I also have some of the newer generations of the Elrogs (after Thomas Mayer took over) and they were sent to be in trade from a customer. He has been using them both in a push pull 300B amplifier for 3 years, and I have now been using them for about 2 months (and putting lots of hours on them). They have so far proven to be reliable. If this is the same across all Elrog's current manufacturing, I cannot say, but I wanted to give my personal experience here. I am also very curious about LinLai's tubes and have read (not very much) but what is out there- and it's been nothing but praise.
Best regards, Aric
Best regards, Aric