Punkuk,
Be careful with the Russian "military" tubes. I bought some "military" 6H8Cs (same as 6SN7) and they were clearly identical to the current Sovtek 6SN7s, and sounded just as bad. YMMV.
Be careful with the Russian "military" tubes. I bought some "military" 6H8Cs (same as 6SN7) and they were clearly identical to the current Sovtek 6SN7s, and sounded just as bad. YMMV.