LinLai WE 300B or the LinLai Global Elite Permaloy 300B tubes ?

. " I’ve noticed that it is a hard grader—tubes that test extremely strong on a TV-7 may not grade as well with the Amplitrex."

Yes, agree with that assessment.  My EML XLS pair tested very well but this was not the case for my 12 year old 6EM7 that originally came with my amplifier. One was poor and the other just okay. I will replace them with a new pair. It's been 12 years so no surprise. 
Charles 

@liquidsound  Thanks for the '250 hour' update on your LinLai Permaloy 300-B's!!! Looking forward to the 500 hour update.

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

@aricaudio,
Your comments in regard to the Elrog 300b is definitely good to know. I believe that Thomas Mayer really has solve the previous issues with this tube (Actually the entire line up of their tubes) and they have proven reliable since his taking ownership 5 years ago. I say this because I no longer read or hear about tube failure since his arrival and company control.

Aric I strongly suspect that the Lanlai is at least as reliable as the Psvane and quite possibly more so, of course time will tell. I plan to buy a pair of their 101D Elite tubes in the near future. I’ve had a very good long run using the Psvane W.E.Replica 101D and the Lanlai may be even better.

I’m not surprised by your experience with the EML XLS . It’s often categorized as a "modern" sound 300b due to excellent frequency extension at both ends of the spectrum and clarity/transparency. Yet at the same time IMHO they retain an organic character and full bodied tonality. If EML made the 101D I’d swoop it up in a heartbeat.

Nonetheless I do have very high expectations for the Lanlai Elite 101D.
Charles

It appears Psvane has new Acme 300B tube out, looks like punched plate vs solid plate for other Acme, priced about $200 more than original Acme. Can't find much info out there about this tube, anyone heard it or have more info?
@liquidsound, any further developments on LinLai tubes? I'm getting very close to pulling trigger on 300B purchase. Coming down to EML XLS, Linlai Elite or one of the Acme iterations.