A couple of possibilities to think about... Either you've got a rogue tube
where there is some manufacturing flaw that is markedly increasing
sputtering. Or there's a problem with the clock circuit which is allowing a
significant over-current through that tube specifically - maybe a current
li
Can You see if the mercury giver has released it's content? Did the failed
tube show any sign of a different color? I have a Telefunken ZM1210 where
the giver has not melted as it should. That tube lights up in a much more
reddish color than the OK ones. If there was an overcurrent or too long
Thanks to all for the replies. I don't think I picked a wrong value
resistor (there are only 3 values of through-hole resistors in my box), so
I'll go with the rogue tube explanation. The affected tube didn't glow any
brighter, nor did it glow in a different color. Anyway, I cannot check the
af
It might also be that you got a wrong value resistor in your PTH box. If it
happens again to the same customer, make him to *measure* the value. It
will not be the first time one gets a wrong part.
Gastón
On Sunday, March 27, 2016 at 10:37:16 AM UTC-3, franetic wrote:
>
> Thanks to all for the r
Something to be aware-of is the elevated current used in multiplexing, in
this case 10mA vs nominal 2.5mA. Info I've read says nixie-degradation is
an exponential function of drive-current (somewhere I saw 2.5).
Even if the exponent is 2.0, increasing the current 4X and multiplexing at
50% wou
@Gaston: I'll definitely ask the customer to observe if the tube in same
position fails again.
@Greg: Multiplexed or not, the usage parameters are within the ratings (as
per data sheet) for 100.000 hour lifetime of the ZM1000 (particularly for
the minutes position). Moreover, I've recently cont
I have seen this once on a ZM1042 where the anode screen had come loose
from the pin at the back, it might be the same with your tube. If you can
get it back you could check it to see if the same has happened to it.
/Martin
On Saturday, 26 March 2016 08:29:14 UTC+1, franetic wrote:
>
> Hi all,
