You need the full info as found within a tube specifications manual.
Here is a start:
http://www.pmillett.com/sylvania_tube_manuals_online.htm
73's de Edd
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:I'm 23 and have very little knowladge of tubes yet own many variations and wish to keep them alive and working where can i get data sheets or usage info other than pin-outs?
:I'm 23 and have very little knowladge of tubes yet own many variations and wish to keep them alive and working where can i get data sheets or usage info other than pin-outs?