Western Electric 300B problem

@antigrunge2 WE does test each tube and provides a test certificate with each tube, my test date 9/18/2024 so these quite recent builds. Further, Upscale claims to burn in all power tubes for 72 hours. If this true, I was hearing these tubes with a decent amount of burn in, not fresh out of box as I had assumed.

Having just held both WE and Acme in hand substantial difference in weight, Acme much heavier. Thicker glass and more substantial base accounts for the weight difference. Acme has gold plated pins, WE nickel?

@sns  Interesting that upscale burns in expensive new tubes.  There are those that say tubes "should not be shipped after they have been used as the heat makes the filaments more brittle".  I think if you can ship them before making the filaments glow, it is a good idea.  that said, I buy a lot of used tubes and generally, almost always, don't have a problem.  

There is no way Uncle Kevin is burning in WE 300B's. Possibly if they have been purchased, and then only if by request. 

I would pay attention  to what @ghdprentice said as I would bet he has tried almost all of them.  

I’ve used two pairs of the new WE 300Bs in my Elekit TU-8600S and have had no issues, just absolutely unmatched wonderful sound quality.

 I would be amazed if they didn’t give you a prompt warranty replacement.