Not to sound condescending, but did you check the polarity. I find as I get older, I hook things up incorrectly, more often. In my youth (35 and under), I could wire-wrap a 30+ IC board. It would take 2 days to wire it up, and another day and a half, to do a continuity check against the schematic. Maybe, I'd make as many as 3 mistakes. I'd make that many mistakes today, on a circuit a tenth as complex !
On Saturday, May 23, 2015 at 2:49:55 AM UTC-7, Thomas Kunzfeld wrote: > > > hi guys, > > I recently bought a bunch of different nixie tubes and as my very first > project I designed a simple > thermometer with an in-9. at first the problem was that the bar was only > about 3 cm long, > even at more than the highest rated current. I read somewhere that those > tubes sometimes need > some sort of "burn in" phase, so i ran them at about 18 mA for half an > hour. after that, the bar was > about 8 cm long. However, after not running for two days, the bar length > dropped again by about > 1 cm. > > i use a switching power supply at about 130 V. > > is there some way to get around this problem? or do I have to run them > continuously...? > > thanks! > -- 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/5990c273-d496-4adc-ad61-fb2cbe819bf2%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
