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I always was kind of afraid of it. Any single zillion years tube I see is “NOS in box”, “measured as new” or “never work”. So, I wonder where those uses up old tubes are gone? Do people trash them or juts sell them “as new”. As many old tubes I ever bought with quoted transconductance figures never were the same after I received the tubes I am not even talking about “match tubes” what is always is a pure BS, they never matched at the necessary for me operational parameter, or gain.
It looks like that with DHT tube it is even worth. I measured the 2A3 and 6A3 that I have and they are so much off the specks what that it is not even funny. When I buy Russian 6C33C then they measure whatever they want then it is fine as they cost nothing. Those DHT tune are expensive but the same crap quality wise – very said. Looking at this I might understand Lamm who sell 6C33C for $100 per tube, assuring it compliance with specs. |