Here you find some interesting original datasheets from tube manufacturers for example from Mullard, JJ, Tung Sol, GT, Svetlana... . It's not complete but if somebody has another link I'd appreciate if you would add to this topic.
One should be said. Todays tube dealers, who are selling the new made tubes, they don't always test their tubes in the conditions we need for our amps. Some do some do not. It needs a huge knowledgement and much time (time is money) to test vacuum tubes. Also for us, it's not easy to know and find out, which dealer are good and honestly. - Sometimes I ask me, why there aren't better tube manufacturer, which are building excellent tubes keeping constant good quality.
I'm glad to know this Metropoulus forum. Here you always get a lot of very worth knowing informations of seasoned person, who know their business!
By the way. I ordered a JTM45 kit from George
Daniel
