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RE: Russian 6SN7s

The Sovtek 6SN7s are the highest distortion 6SN7s we have seen.

The EH and Tung Sol tubes are better, but both suffer grid contamination problems (so could die in a matter of weeks or years, no way to tell) and heater/cathode leakage problems. If you get some that don't have these issues they really sound pretty decent.

Otherwise I would go with the Chinese 6SN7 which is a copy of the early 1980s JAN Phillips tube. They have low leakage (usually) and hold up well.


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