Some interesting material here

[Electron Tornado]

Found a link with some material that folks might find interesting.


http://www.4tubes.com/3-BOOKS/BOOKS-LITERATURE/ENGLISH/




Vacuum Tube Valley:  http://www.4tubes.com/3-BOOKS/BOOKS-LITERATURE/ENGLISH/Magazines/VacuumTube-Valley/

[HotBluePlates]

Pete Millett's site has some of the same resources (and perhaps more):
http://tubebooks.org/technical_books_online.htm

[Lectroid]

Found a link with some material that folks might find interesting.
Vacuum Tube Valley:  http://www.4tubes.com/3-BOOKS/BOOKS-LITERATURE/ENGLISH/Magazines/VacuumTube-Valley/

The 2nd PDF in the list had a nice detailed discussion of a variety of golden age 6V6s