Making a type C triode vacuum tube.
Captain H. Round of the British Marconi Co. designed the type C tube in about 1913. It is a triode that was meant for high gain high frequency use. No examples of the tube were available so some estimation was used in making the tube.

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making a deforest spherical audion tube

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Hand Made Vacuum Tubes by Claude Paillard

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40 meter AM/CW Transciever - Part-2

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making a mercury arc rectifier

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making a miniature vacuum tube triode

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Making Steigerwald electron gun with CNT emitter

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Tesla Tube Factory Visit—Czech Republic 1998

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New Triode Design and Build

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HUGE VACUUM TUBE COLLECTION

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Vacuum Tube: The Technology We Killed in the 1960s That Quietly Kept Working

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Adam Savage's Vacuum Tube Collection Gets CT Scanned!

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Guitar Amp Vacuum Tubes Part 1: Triodes and Tetrodes

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The Cheapest Laser Made Is Underrated Photonics Fun

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How to Make a Sealed Cathode Ray Tube at Home

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The Mullard story

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Have you ever seen electrons? Watch this!

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Common Beginner Mistakes In Hobby Machining

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The Technology We Killed in the 1960s Is Now Worth $3.3 Billion

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