Warren, yes, this has been beaten to death, just check the archives. It's a very common newbie question. It is what it is.
FWIW, there are better stock tubes available today then 10 years ago. Also, as mrtennis mentioned, many circuit designs today aren't as dependant on the quality of the tube as in the past. All of this is very good, as the prices of NOS tubes is getting downright ridiculous. It makes me wish I had invested $10K in tubes 20 years ago, I could be retired right now.
The other option is SS......
Cheers,
John
FWIW, there are better stock tubes available today then 10 years ago. Also, as mrtennis mentioned, many circuit designs today aren't as dependant on the quality of the tube as in the past. All of this is very good, as the prices of NOS tubes is getting downright ridiculous. It makes me wish I had invested $10K in tubes 20 years ago, I could be retired right now.
The other option is SS......
Cheers,
John