Why aren't new vacuum tubes as good as old ones?

The company is RCH Labs. phone number is 775.410.8798

This thread is astonishing. Many new tubes are fabulous (KT120s have been nearly unanimously accepted as great), guitar amps use FAR more of the available tubes than home audio geeks ever will, and new "boutique" tube amps and reissued amps sound mostly better than ever (and 99% of 'em are sold with new tubes). Tubes like the high end Psvanes are beautiful, very well made, and sound amazing. I've only had a few tubes not do the job or fail in my many years of using 'em, and among those were NOS tubes. So, basically, you're all insane.

I hope Atmasphere is right. The man over a Vintage Tube Services in Mich. told me it is an human craft. Like Ebm says. You da man Ebm. Anyway he told me the extent they went to to produce good ones. And that to bring new tubes to the level of the good old tubes just a computerized regimented process can't really match. It hasn't yet. It sounds like it is still is a human endeavor to make the best tubes. I have had several tubes and can hear a big improvement with my NOS over new stock. Anyway it would be nice if it does.

Whew! That's a relief. Thanks Wolf. Can you recommend a really good 7189?