300B Tubes - Which is Best?


Can't find anything addressing this on site so, here we go! What is your favorite 300B SET tube and why? What source do you use for these little treasures? What experience has anyone had with the Sophias, sound and company who sells them? Any thoughts on Western Electrics and that strange blue glow? Maybe they aren't as vacated of gases as some others? Anything new out there? Thanks, people.
tomryan
The Western Electric 300B is THE class act in this arena.
They have a rated life of 40,000 hours (the 6550 in my ARC VT-100 Mk-III are reated for 2000 hours/2 years).
The designers took something like five years (from project genesis) before they reissued this classic.
I also like the Sophia Electric TJ Meshplate, which is actually just a re-branding of the Tianjin Meshplate also known as Full Music Meshplate. They are all the same, under different names, made by Tianjin. Beats the WE.
My experience is that the amps you're using do make a difference since WE's and meshies have distinctive sonic signatures. Call Jim Ricketts of TMH audio. He's exceedingly knowledgable. Also keep in mind your ears are subjective. You may find that too much transparency is a little too much. If using WAVAC amps from Japan then my vote is for meshies. TMH audio.com or 937 439 2667
Stereophile did a comparison of 300B tubes a while back. It is archived on their web site.
I like the WE ones. They were moving recently and setting up a new production line somewhere down south, so supply of them is hard to find at the moment - maybe sold out temporarily. They set the standard in this tube and have been doing so for 60+ years.

40,000 hours is fairly unrealistically optimistic. A lot depends on the amp, but even driven at low power, it's not likely to get 40,000 hours out of a set, despite the 'myth' about that. Guaranteed they will be pretty spent even @ half that usage. Tubes just dont' last that long, esp. power tubes. (think: that's 8 hours a day for 13-14 years straight. No....just not realistic)

They made the 'old' version up until 1989, then stopped, thinking there was no more market. They brought the line back up some years later, in the 90s... I don't think it took them 5 years just to restart the line (though they are notoriously slow, re: product developement) - most of the tooling and some of the workers are originals from the old production. There's tons of good info on this @ their site, www.westernelectric.com

-Ed