| 250vdc supply on his board would be too hot for a 74141 so probably | too hot for a 74142.. Maybe a transformer supply.. | | -Adam W7ATJ
250V is a tad too hot for a 74141. Western 74141s had zener clamps at ~60V, an from experience the Russian parts started to breakdown ~100V. So if a nixie turns OFF ~130V, then the max supply is either 190V (130V +60V), maybe 230V (130V+100V) for a Russian part. If you use a MPSA42, which is good to 300V, then the supply can go upto 430V (assuming 130V minimum sustain. 130V is only a ballpark number). Your anode resistors might get a tad hot, if use that extreme of a voltage. In practice, nixie supplies should be in the 180V to 200V range. 170V is the absolute low end (direct drive only, too low for MUX'd circuits). 220V probably the high end limit, if you use the 74141. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
