I use a Triplett 3413B emission tester for quickly testing tubes. It has a built in scroll that covers pretty much every radio and TV tube from 1930 to the mid 50s.
It's basically the same a a Knight 600 or an EICO 625 which are also good.
This website has a lot of great info on tube testers:
http://tone-lizard.com/Tube_Testers.html