Re: [neonixie-l] Re: What will happen if current slightly below specification in long time?

[Nicholas Stock]

I've made a number of Tubehobby's IN14 clock kits over the years as gifts for friends and family. They're multiplexed IN14 clocks. No audible problem and the clocks are still working well after 12 years. The only complaint is those damn IN3's and their tendency to ionize all over the place!  Nothing wrong with multiplexing IMHO. Nick Sent from my iPhone On Jan 14, 2023, at 09:19, gregebert <gregeb...@hotmail.com> wrote: I've seen a few postings about audible noise coming from tubes that use PWM. I use direct-drive and constant-current. On Saturday, January 14, 2023 at 8:53:18 AM UTC-8 Christian Riise Wagner wrote: Out of curiosity, why doesn't PWM sound like a good idea? There isn't really an alternative, other than lowering the current, which you don't seem too fond of either. I'd say PWM is the easier method. Just choose a sufficiently high frequency to avoid noticeable flickering. Note that the ammeter averages out readings, so whether the tube is driven at a constant reduced current or PWM, the reading will be lower, even though PWM is full current delivered in pulses. lørdag den 14. januar 2023 kl. 14.14.52 UTC+1 skrev overdoingism Lab.: My nixie clock has a switch, with three level, full - low - off. The low level setting does make the tube look a bit dimmer. And the current seems to be slightly below specification. For all I know, it's probably not good for "Cathode Poison", but I can switch back to full level to flush them. Besides, is there any disadvantage? BTW, Is there any way to adjust the brightness? PWM doesn't seem like a good idea. -- 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 view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/647dea75-b986-436c-9587-cf85a2ee92e0n%40googlegroups.com. -- 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 view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/5619A206-C9B4-4AED-9806-30D62D7D7A9C%40gmail.com.