Tube data sheets

[fusordoug]

This electron Tube Data sheets is where I get most of my datasheets. This is a great resource, and I'm hoping that others will add theirs to the list here.
This one Tube data sheets is a bit more British and audio oriented.
The Virtual Valve museum is sometimes handy as well.
And here Magnetrons is some info on commercial magnetrons.

Any other handy links out there? Please add them in replies, and when the time is ripe, we'll put them all on one page for everybody.