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In the Forum: Audio Discussions
In the Thread: Initial thoughts about new/old Lamm ML2s

Post Subject: I wonder why Lamm does it.Posted by Romy the Cat on: 3/8/2010

You have this behavior with the tube that you run for 6 month? That is strange. The behavior you described (with this amps) is typical for a very fresh new tube but after 20-50 hours the amplitude of the current raise shall be minimum and and after 100 hours it I pretty much negligible.

http://www.romythecat.com/Forums/ShowPost.aspx?postID=6140#6140

I did not see a tube that behave as fresh as the new one and I did not see a tube that need 2 hours to stabilize current. It does not mean the do not exist and you might get one. If I were you then I would get a gamma probe and would try to test the tube for radioactivity….

I usually suggest to set your new 6C33C tube for operation of 250mA-270mA, use it for a while and only then set 300mA
The Cat

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