This is a truly exceptional find, while it is quite rare and hard to acquire, the effort is absolutely worth it. This tube delivers a sonic signature very similar to the highly coveted Tung-Sol 6SN7GT with round black plates, yet it provides even greater transparency. Consistent with Tung-Sol manufacturing from the 1940s, the glass features complete coverage with a black film, making it impossible to inspect the internal plate structure, however, the superb sound quality makes that a non-issue. I suggest grabbing a 6N7 to 6SN7 adapter to experience this performance for yourself.
This is a truly exceptional find, while it is quite rare and hard to acquire, the effort is absolutely worth it. This tube delivers a sonic signature very similar to the highly coveted Tung-Sol 6SN7GT with round black plates, yet it provides even greater transparency. Consistent with Tung-Sol manufacturing from the 1940s, the glass features complete coverage with a black film, making it impossible to inspect the internal plate structure, however, the superb sound quality makes that a non-issue. I suggest grabbing a 6N7 to 6SN7 adapter to experience this performance for yourself.
Final Verdict: Highly Recommended.