I was told by some very experienced tube nuts that the best 6SN7 is the earliest version of Sylvania VT-231. Is there any truth in it? I thought the RCA red base 5692 is the ultimate driver tube around. Any thought on this issue will be helpful.
Edie, where is this 6SN7 going, and what function does it perform in your system? Also would help if you explain your reason for wanting to replace the current tube in that circuit ( microphonics, distortion, short life, etc.)
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