Last modified: 21 November 2021
2.8. Nixie Tube Health
Nixie tubes suffer from a specific problem called
cathode poisoning
. Ideally, all digits (cathodes) in a
nixie tube should be used regularly. However, that is not true for a nixie clock. Only even tubes run in
this optimal mode, odd tubes use only some digits. For instance, the leftmost tube uses digits 0,1,2 to
display tens of hours position. The third tube (tens of minutes position) uses digits 0,1,2,3,4,5. When a
particular digit is not used for a long time (e.g., digit 8 on the leftmost tube), that digit is covered by a
metal deposit released from the other activated digits. That particular digits will eventually have defects
in the glow once you need to use it (e.g., to display
Problems with the glow can be avoided by regular exercising of all digits in a tube. Just a few minutes
per day is enough to keep the tubes healthy. For this purpose, we implemented a routine called
that is regularly activated and keeps the nixie tubes healthy.
If any of the tubes shows a defect of the glow, you can try to
Last modified: 21 November 2021
2.8.1. Cathode cleaning interval
The
Cathode cleaning interval
can be set to the time below. From the lifespan/efficacy point of view, all
the options are equal.
•
Every minute
– the cathode cleaning will be activated every minutes for duration of 3 seconds
•
Every 10 minutes
– the cathode cleaning will be activated every 10 minutes for duration of 30
seconds
•
Every 30 minutes
– the cathode cleaning will be activated every 30 minutes for duration of 90
seconds
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