> On May 7, 2024, at 9:55 PM, Zachary <zacharylaurin2...@gmail.com> wrote: > > Yes that does in fact confuse me even more.
I must be psychic. > However I looked at the component list from the source of the image you sent > ("M. Moores' Nixie Thermometer Kit") and he does use 1/4W resistors and not > >1W like the Russian datasheet indicates so that's good. I have the thermometer. It's designed to only travel halfway up the IN-13. Seeing as how 140V x 4.5mA = 0.63W, perhaps Mike's playing it safe with the current. Or it may play nicer with "bad" ones. > I'm not sure what I need for Q2 however. Should I use a second MJD340 (which > is the SMD version of the MJE340 I've seen on many existing design) or any > transistor will do? Or do I need it at all? Many designs don't include it for > some reason. Mike seems to be a fan of discrete circuits so there must be some magic going on here. You should ask him. > My understanding is that it's there for because of this from the Russian > datasheet: > > "To avoid braking the light column when switching abruptly, we recommend: > > When switching on, the main cathode should not be on, and there should only > > be current on the auxiliary cathode." I'm not sure that I've ever seen it actually done that way. Terry Bowman, KA4HJH "The Mac Doctor" https://www.astarcloseup.com "Every kid starts out as a natural-born scientist, and then we beat it out of them. A few trickle through the system with their wonder and enthusiasm for science intact."—Carl Sagan, Psychology Today, 1996 -- 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/61D77119-561B-4E52-B64D-914CD7EA18CB%40gmail.com.