YOU HAVE RUINED ME!!!!! I can't recall who pointed me at the eBay listings or the other tube recommends, but thank you - I think
Today I picked up two sets of Russian tubes for my Freya. I got the 6N7S and the 6N8S sets of 4. So far I put in the 6N7S / 6H7C / 6N7GT FOTON tubes and I can't believe the difference. Much more mellow, rounded and less "tinny" than the Tung Sols. I was afraid that I wouldn't hear any difference, but so far very happy.
So I have a couple of questions: How does one store all these tubes? I'd appreciate recommends for safe storage - I remeember one reference to display cases, I would love a good source for those.
Second, these are all advertised as New / NOS, but have significant darkening on one lower quadrant of each tube. Is that normal for NOS?
The 6N7S tubes claim to be older than I am, and I ain't no spring checkin! Thanks for all the previous guidance.
Cheers