I have no experience with IV-9s specifically, but I do have a DR2010 Numitron clock, and the tubes don't even get slightly warm. They feel close to ambient temperature even after hours of operation. Granted, I am slightly underdriving them but I doubt running them at their rated current would make a significant difference. Based on that, I am fairly confident that active cooling isn't necessary for your use case.
newxito schrieb am Freitag, 8. Mai 2026 um 00:16:43 UTC+2: > Has anyone measured how hot an IV-9 can get? Right now, I don’t have > access to a tube to test myself. > > I'm wondering if I need to foresee some kind of active cooling for my > project. I’m designing a calculator with 16 x IV-9 tubes in a closed case > with some ventilation slots. If I calculated this correctly, they would > dissipate about 11.5 watts if all segments were on and that’s a lot… > -- 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, visit https://groups.google.com/d/msgid/neonixie-l/32bdb20a-3fc4-4b5c-9f38-a4095b19ded5n%40googlegroups.com.
