@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 contacted a customer who bought two such clocks from me 10 years ago out of curiosity. The only complaint was that the tube in tens-of-hours position was starting to fail, which is very similar to my experience. The ZM1000 in one rugged nixie, so I hope that the above example is a rare manufacturing defect. Thanks to all, Damir On Monday, March 28, 2016 at 5:39:15 PM UTC+2, gregebert wrote: > > 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% would cause tubes to degrade about 8 times faster than they would with > direct-drive. For this reason, and others, I always use direct-drive for > discrete tubes. The one panaplex design I did had separate pins for all > anodes & cathodes, and that, too, was direct-drive. (most multi-digit, and > probably all dot-matrix displays require multiplexing due to pinout). > > In this particular case, where only 1 tube failed, it's more likely to be > a manufacturing defect, or the tube had substantially more hours of usage > than the others. > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/92af8739-ced1-4430-9cbf-7cc5696b1a85%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
