Just a guess, but I think by lighting them all up you get some kind of “super ionization” in the tube, which could then increase the current and heat dissipation.
Bill From: [email protected] [mailto:[email protected]] On Behalf Of Yohan Park Sent: Wednesday, March 31, 2021 3:15 PM To: neonixie-l <[email protected]> Subject: [neonixie-l] Lighting all digits at the same time: Why does this happen? I have a few Chinese QS30-1 tubes lying around which don't have much value for me and was wondering how it would look to have all digits lit at the same time. So I looked up the specs which say 170V and 2.25mA So I calculated the needed resistor to have it hooked up to 230V which is a little below 27K I then connected a 27K resistor to one cathode and it lit perfectly fine (230V AC so the anode also glows). So I then connected 10x 27K resistors to all the cathodes and plugged it in. Holy Moly! The thing lit up like crazy and was drawing over 9 Watts and was getting VERY hot. So I turned it off again after a few seconds. Can anyone tell why it's behaving like that? -- 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] <mailto:[email protected]> . To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/bffb114c-9810-4d65-8e98-ee13f6c860fcn%40googlegroups.com <https://groups.google.com/d/msgid/neonixie-l/bffb114c-9810-4d65-8e98-ee13f6c860fcn%40googlegroups.com?utm_medium=email&utm_source=footer> . -- 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/02f201d72662%2493847160%24ba8d5420%24%40gmail.com.
