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 [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/647dea75-b986-436c-9587-cf85a2ee92e0n%40googlegroups.com.
