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Original Message
Two basic flavors
Posted by Chip647 on January 10, 2017 at 12:36:31:
There are 801/10 with thoriated tungsten filaments and ones with regular oxide coated cathodes. They do sound different, I like the thoriated type as they are a bit spicier. The thoriated tungsten shine brightly.
Sylvania, RCA, Hytron are all good.