I'm not a big tube fan myself but I recall reading somewhere that the performance parameters Mr. Detlof wants to measure are available from a "curve tracer" (one made for tubes of course) which sweeps grid voltage & plots graphically vs. plate current. I believe that these tracers are fairly expensive (cost not justifying return on investment unless you're "in the business") and require a fair amount of electronics knowledge just to operate & also to interpret the "results". Idle noise measurements could be made with a test fixture & a wideband AC voltmeter or scope; don't think that the curve tracer does that too..
How to test those NOS tubes
After many decades of audiophilia nervosa und some years of tube rolling, I've finally bought myself a nice WE Tube Checker to try to measure and match those critters myself. Since I'm an absolute greenhorn in this game, what are the main parameters I must look out for? How do I test for noise for example ? Is there a site, which helps newbees like me? Are there books I should be on the look out for? Could anybody tell me the basics? Any help is greatly appreciated. Thanks in advance!