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Questions about tubes and gear that glows. FAQ

RE: Ballast tube

Hi, Lee. I believe this is a 'Barretter tube'. The rest you know. Think current source. The name derives from a somewhat lookalike invented by
R. Fessenden used as a radio detector - going back to the turn of the
next to last century. A better term for it would probably be an iron-
hydrogen resistor. The Fessenden invention involved a thin platinum
wire encased in silver wire, drawn, and under vacuum under glass.


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  • RE: Ballast tube - elektron 04/7/1418:35:15 04/7/14 (0)

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