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Interesting...

Have you (or has anyone else) ever tried wrapping a tube base made of metal, like for example the Sylvania 6SN7W? Descriptions of the character of that tube suggest wrapping might be beneficial. I use humongous 7241 triodes in the output stage of my amplifier. They get about as hot as any tube ever used in audio and have metal bases. I wonder whether I can get away with wrapping the base without shortening tube life, just for an experiment, and whether the glue on the tape would hold up to such heat. (Filaments draw 7.5A per tube!)

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