I would like to ask the group about an experience I am having with a
batch of (8) Burroughs 6844A nixies just purchased.
They are new in box from 1968. All have same date stamp Mar 4, 1968.
As far as I can tell they have never been out of
these original boxes. I tested them and they all malfunction the
same way. The tiny wire leads inside the tube which
connect the digit cathodes to the pins get surrounded by a bright neon
glow, and the digits never strike. Once in a while
by connecting and reconnecting rapidly, I can get a digit to strike,
but not often.
What is going on inside these tubes which causes this? They were
tested at 170 volts DC with 15k anode resistor. Dropped that down
to 10k for a few tests, which helped a bit with some partial digits.
But this entire batch is bad. What causes this?
The glow seems plenty bright. Thanks, Chuck
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