Cold Cathode Tube Demonstrated!

Still instructive today... Radio-Craft, Popular Electronics, QST, Electronics World, etc.
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Cold Cathode Tube Demonstrated!

Post by KirtB » Tue Jul 25, 2017 10:15 am

Cold Cathode Tube Demonstrated!, January 1935 Short Wave Craft

Cold cathode tubes are distinguished from hot cathode tubes in that they do not use a separate heated element in order to generate free electrons (thermionic heating). Rather, a 'starter' type process is used to initiate the electron generation and then a cascade multiplication keeps the process running. Although this article reports on a cold cathode oscillator vacuum tube - designed by none other than television pioneer Philo Farnsworth - some more familiar examples are neon and fluorescent bulbs and even the veritable Nixie ...
Kirt Blattenberger

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