Hello Richard, I don't have any Minitron (yet?) so I had a look to my Numitron tubes. My IV-9 clock was in the sunlight, I checked 47°C (on the center of a 0) I put it in the shadow it goes down to 36°C my Apollo DA-2000 Numitron is at same temperature 36°C, both in a 26°C environment (up to now...) the IV-9 is given for -60 / +100°C the DA-2000 for -50 / +70°C
Regards, Benoit. Le lundi 17 juillet 2023 à 06:41:21 UTC+2, Richard Scales a écrit : > I have recently built a clock using FFD21 Numitrons / Minitrons/ The spec > sheet says that the segment current should be 15mA +/- 2mA - I have > measured it at 14.7mA so that should be fine. > > I note that after 10 minutes of operation, the displays are warm to the > touch. > > Now then, I know these things are essentially light bulbs and work on the > exact same principle as my reflow oven but... > > I appreciate that there are glowing elements just below the glass so one > might expect it but I wonder how warm they should get. > > The spec says operating range up to 70 degrees C and they are nowhere near > that warm. > > I just wondered if anyone had any experience of operating this kind of > display and what kind of heat you might expect to be generated? > > - Richard > > > -- 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/9ec24f44-a57a-494d-8a72-1a62b05bf4a2n%40googlegroups.com.
