Alic,
Cathode poisoning only affects the unused digit. So it isn't a reason to
replace a tube, as the affected numbers are never used. The only time I
could see it being an issue is in the hours tube that you might go from
displaying civilian time and then you want to display military time.
I remotely located my PIR sensor so it is hidden and in a good position
to detect people. So I do have a wire leading from the clock but at
least don't have the sensor sitting like a wart on the clock. It makes a
great night light, off when you don't need it, on wen you do!
Jonathan
On 6/7/2016 1:24 PM, Alic wrote:
I don't own a nixie clock long enough myself, but I've heard of
several examples of nixie clocks running for a long time where the
tube of the 1st hours digit had to be replaced. It seems that no
cathode poisoning prevention was used back then though.
The future will tell which of the current life prolonging measures is
the most efficient.
Turning the nixies off when nobody is looking seems to be the obvious
choice.
Now all I need is to find a way to hide that ugly PIR sensor ;-)
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