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RE: Ralph, What about my 7241s?

Posted by Lew (A) on May 24, 2020 at 09:06:32

In Reply to: RE: Ralph, What about my 7241s? posted by pictureguy on May 23, 2020 at 18:55:56:

Well actually, the goal is to condition the filaments before you apply B+ from plate to cathode. So while you are applying B+, the filaments are having to do their job of producing electrons, and therefore at least in theory they are not ".conditioning".That's the way I think about it. It's kind of like letting your car idle until the oil and water warm up sufficiently before asking it to perform at a high-level. I could be off base. But in researching this topic online, and with respect to a generic triode, the recommendation of another expert was 5 to 6 hours. But Ralph has vast experience with the particular power triodes used in his amplifiers, and I have no doubt that his recommendation to do it for 4-5 days is based on his long-term results. My question is whether that applies to the type 7241 power triode, which can pass many times more current than a 6AS7.

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