Current production glass electron tubes

[The Black Adder]

+1

Very useful indeed!.. Thanks for sharing!

[awkwardbydesign]

It's going to be Knowledgified - it's going in the AoS Library.

Great, but I have to say stickified looks more like a real word than Knowledgefied. IMHO, of course.

[HanTheMan]

Glad you guys like it. I'd like to add that the sonic signature's portion was based mostly on collected data from reviews (commercial and personal) on the 300B tube as it is a tube ALL of these manufacturers make a variation. except SED (they used to make it til fairly recently however), Meixing, Ayon (their high power triodes have similar characteristics) & Elrog.

In addition to these manufacturers, I know of a few manufacturers who recently stopped production of their audio tubes, Ei somtime after the break up of Yugoslavia (not sure when), in China, Guiguang's facilities in 2011 were bought out by Psvane, Viac/AVVT (2001) & Tesla Vršovice (2006) from Czech Republic, and Cetron in USA stopped producing around 2006(?). Westrex hasn't been producing for a while (2008-9?) as well.