If NOS pre or power tubes became unavailable altogether, what new tubes would you buy?

I’d be up a creek w/o the NOS Russian 6h23eb tubes for my Audible Illusions Modulus 3A Pre-Amp. Notoriously hard on tubes this preamp runs those tubes hard. New Electro Harmonix 6922 are reliable and long lasting they sound OK.

I don’t waste my money in cryonics, as I personally can hear no audible difference. Although, I have seen longer tube life which may or may not have been attributable to the physics of this process.

Currently grooving on the 6550/KT-88 sound for the amp side. Filling the bill quite nicely the new issue Tung Sol KT-120, (my circuit supports it) or even better yet. The new issue Tung Sol KT-150 (the egg). Buy these while you are able.....oh yeah, bring it on!

Anachronistic it is:

https://www.facebook.com/AudioLifestyle/videos/1201872699867354/

Thanks for you post Deepee99 or should I say Mr. Natural?  I find your bias refreshingly intriguing.  Is that CV-181s a drop in replacement for a 6SN7 tube?  If the big bastards fit I might just give them a listen.

Agreed Raul: my ears are the "corrupted AHEE"

"Is thank's to that AHEE/HE-community that we are here. IMHO almost all of us belongs to that HE-community/AHEE that's different from other audio communities.

That for you has no meaning does not means that HE-community/AHEE does not exist because is " here ", alive and growing up!.

IMHO the AHEE is beyond what you, me or any one else can/could think about: just exist and this is a fact!!! that does not needs any one " blessing ".

Btw, like it want it or not you already are inside the AHEE and unfortunately you just can't do nothing about because is not your choice to be there: you are there!."

Looking forward with anticipation to the vaunted opine of comrade Nandric/Dover regarding this subject.  I am certain he will be arriving shortly.