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Nixie Tube IN-18 Tester / Healer

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Uploaded by on Dec 26, 2011

A simple device for testing and/or healing Nixie tubes of IN-18 type. An 11-pole switch is connected in series with a 50 KΩ pot (+ 470 Ω resistor for safety), powering from an 180V DC source. Normal operation at 2 mA is shown. For healing tubes, one can double the current (4 mA), baking the tube for several hours in order to remove cathode poisoning. Enjoy !

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  • Hi, I have an old IN-18 Nixie clock that is showing signs of cathode poisoning. I was wondering if there might be an available schematic i could use to "heal" the tubes as you've shown. The IN-18's are worth there weight in gold these days so anyway to prolong them would be greatly appreciated.

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