I agree about breaking 'em and uneven wear, and the digits that get
cathode poisoning aren't getting used, so who cares?
I was tinkering around on the code for my oldest clock and checked the
hours tube. Couldn't see any difference after 15 years of operation. The
first 9 years it was on 24/7. The last six it has had a motion sensor on
it and only runs with someone in the room. These are B5991 tubes.
Jonathan
When you really think about it moving them around not only risks
breaking them but can cause multiple tubes to have uneven wear vs just
a couple. The 10s hour spot only does 0, 1, and maybe 2 so you end up
with the most time on those digits. Move that tube to the seconds
where it gets equal time on each and you still have more time on those
first digits but after a while they'll start to look dimmer than the
larger numbers.
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