Sorry Gs5556 I have to disagree! There is NO WAY that Russian mil-spec sound anywhere near as good as some of the classic NOS tubes. Also, small signal (pre-amp tubes) should last 6,000+ hours (left on 24/7, these tubes should last AT LEAST one year...switching off when you're away or not listening for awhile and these tubes should be good for two to three years!) The Russian/Yugo tubes, as a general rule, DO NOT LAST AS LONG AS GOOD NOS TUBES!!! (Looser tolerances and quality control than premium NOS!) Ya gets whats ya pays for!
