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Original Message
RE: RCA 6SN7
Posted by DAK on January 11, 2017 at 17:44:19:
If you want to get USA made, which frankly are some of the best for price, IME, RCA seems to be a more laid back type tube. There are NOS available here and there. You would probably need to make a purchase or 2 to get 4. The "black glass" type are usually expensive even used and maybe microphonic. Make sure you know what to look for so you don't get ripped off. Also if your preamp is new there will be some time that it needs to burn in before the sound settles down.