And Now - The Filamentless Tube

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And Now - The Filamentless Tube

by KirtB » Wed Jul 26, 2017 10:17 pm

And Now - The Filamentless Tube, March 1933 Radio-Craft

If this article had appeared in an April edition of Radio-Craft, I might have suspected it was a Fool's hoax, but it was the March issue and, it turns out, it was serious. Obviously the concept of a filamentless tube did not work out well since the overwhelming majority of vacuum tubes sold up until the time semiconductors took over the electronic device market had separate filaments (heaters). It was a great idea, though, and the world is thankful for the pioneers who take the figurative 'arrows' for the rest of us. We benefit from their hard work and ingenuity, while they suffer the agony of defeat, with an occasional taste of the thrill of victory. It is too bad the concept did not work because, as pointed out in …