If the tubes show signs of poisoning within hours, something is seriously wrong with the tubes, not the clock.
I have a Nixichron that ran for many years, and some of the tubes started to show poisoning symptoms very gradually over time. Jeff sent me info on a hardware update, as well as advice on how to de-poison the tubes. It took a tad of rework and a few hours total time. The rework lowered the anode resistor value and raised the high voltage, so the tubes ran a little "hotter", but the poisoning has not returned at all. And I completed that rework at least five years ago. The clock is running strong and I expect it will for many more years. I run it 7 hours/day, and not at full brightness. I did have one tube fail... what looked like poisoning was in reality a slow gas leak. Probably a result of my removing the tubes from rigid sockets. The Nixichron has no anti-poisoning routine. I've run across numerous clocks that do, but some don't up the brightness to max during the routine. So I find that of questionable value. Others do up the brightness... don't put those clocks in your bedroom. Terry On Tuesday, May 30, 2017 at 7:38:34 AM UTC-5, Luka C wrote: > > @Ira, I think he already mentioned that he does not own a scope. If we > knew the model of the clock, maybe there would be someone who knows such > data from the firmware of the clock. Btw, if the tubes are NOS and have > been running since January 2017, then there is something seriously wrong > with the mentioned clock? Does it have anti-cathode poisoning routines > activated and how often? -- 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 [email protected]. To post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/a2daa453-783b-443e-b908-8812724d541b%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
