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I recently bought a Tungsram brand 6j5g, the glass sleeve also etched with the word "barium tube", it didn't say the country of origin, I wonder why barium was used? Thanks
Wal
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Topic - Tungsram "barium tube" What is that? - bouncy ball 21:26:29 12/10/16 (1)
- RE: Tungsram "barium tube" What is that? - Eli Duttman 23:22:42 12/10/16 (0)