Tube amp schematics, tube datasheets and other tube related technical info.
http://www.drtube.com/
Vacuum technology resources for students and more advanced users. Fundamental techniques to SPICE simulation. From Roy Schmaus at the Electrical and Computer Engineering Department of the University of Alberta.
http://www.ee.ualberta.ca/~schmaus/vacf/index.html
Tube data book online - Main Index.
http://klausmobile.narod.ru/td/indexe.htm
Roy Schmaus presents tube information, and articles about the R1155 receiver.
http://www.ee.ualberta.ca/~schmaus/tubes.html
Cathode Ray Tube data - scanned images from original datasheets. Some are from RCA HB-3 handbook.
http://www.geocities.com/simionovski/
From the WPS Archives Datasheet database, 1958 - 1961
http://www.wps.com/archives/tube-datasheets/
Tube Data for the 304TL and other similar tubes.
http://www.alumrocktech.com/304tl.shtml
Tube data and other information from this company in Germany. Sales outlets in several countries including USA.
http://elektronenroehren.de/avvt/indexf.htm