NOS tubes

Thank you gentleman for your responses, my question was posed for two reasons1- my own curiosity and 2- a few months ago I bought my first tube amp , and you know what happens after that!- correct, tube rolling questions!!

The new Sophia/Full Music 67SN tubes that are made in China are (IMHO) superior to the many NOS tubes that I have tried in my Atma-Sphere Amps.

These tubes present a wider frequency response and a deeper soundstage.
Although, they are quite pricey at $100 each for a class A rated tube.

So, high quality tubes can be manufactured to perform as good or better than the earlier counterparts. 
But, the market for them is small and I don't see that changing.

ozzy

What amp did you buy wow?  If you decide to start rolling tubes, it would be best to work with a good tube dealer (Brent Jessee, Andy Bouwman at Vintage Tube Services or Kevin Deal among others) rather than try your luck on ebay.  They can offer educated opinions on which tubes might work for you and you can trust that you are getting what you paid for.  It will save you money in the long run.

I've never enjoyed my conversations with Kevin Deal.

ozzy

I always enjoy talking to Mr. Deal. Very informed and reasonable man. He is, in his arena, an artist and artists are sometimes misunderstood.