Tube rolling newbie- how to choose NOS tubes

complete waste of time and money to buy nos or other tubes without significant run in time for your new component…. burn in, listen critically, discern where you want to go

I disagree with this. Many manufacturers of tube-based gear ship their products with the best sounding, current production tubes that are readily available and don't increase cost of materials too much. Their expectation is that you will roll tubes - pretty obvious, why else would you buy a tube DAC.

All you need to do is leave your DAC on for a few days, identify what you don't like or want more of (in my case it was a high-frequency harshness/sibilance), and try out some NOS tubes. 

+1 @lowrider57 I got my most recent tubes from Brent in less than a week, and that was only because he is really busy.

Talking the push from above comment i can add that most tube rollers forget, that current manufacturers create their gear with modern tubes for sound and characteristics in mind. Also they do not assume or expect that everybody will do tube rolling. They go with what is available at the time of production. On the other hand we are not certain that a NOS tube would bring vast improvement, many times it can be the opposite. This means proceed with caution, money spent elsewhere in the system can sometimes yield better results.

But you would not know if not trying and that is a part of the game.

But you would not know if not trying and that is a part of the game.

... of fleecing the uneducated.

Thanks all for your advice, I'm learning a lot.  This is my first experience with tubes so I'm in experimental mode to understand the sonic differences between tubes. I'll also be using my DAP as a SS desktop dac/amp to sonically compare. 

@kennyc 

Read the descriptions at the top of Brent Jessee's page.