A PIR is a must. Datasheet for the BA0000-P31 says 10,000 hrs at 100 Foot-lambert (FL). Is there any reason to think that these should age differently from a regular CRT?
On Wed, Apr 5, 2023 at 1:19 PM gregebert <gregeb...@hotmail.com> wrote: > now the BIG question......how long will the NIMO tubes last ?? I've done a > limited amount of runtime on mine, less than 50 hours, and I can already > see very faint phosphor burn with a UV lamp. My anode current is around > 30ua (varies by digit, but averaging around 30ua which is the datasheet > spec). I also wonder how long the filaments will last (each tube has two > parallel filaments), either from power-cycling or total runtime. I have > inrush current-limiting on the filaments so they dont get stressed as much, > per recommendations on how radio/TV stations prolong the life of their > expensive transmitter tubes. > > I have a PIR sensor to shutoff the HV after a programmable time (currently > 100 seconds), and another programmable delay to shutoff the filaments. The > filament timeout is the one I'm not sure how to optimize; I was thinking of > running up to 26 hours so I could do multiple activations per day without > cycling the filaments. I do have a front-panel switch to override the PIR > sensor so that the display will stay off, and consequently force the > filaments to time-out. > > I dont have enough NIMO tubes to experiment with and determine the best > timeout to maximize lifespan. I'm hoping it will end-up like the Voyager > spacecraft, which were overdesigned and have outlasted the wildest > expectations of how long they will function. > > On Wednesday, April 5, 2023 at 12:35:38 PM UTC-7 jörg wrote: > >> The TH-19A is pretty interesting but unobtainium. >> So I have switched to the green neon indicators, which I've ordered some >> time ago at aliexpress. >> Same type as gregebert use, I guess. I've mounted them a bit too far from >> the center. >> The nimos are dimmed based on a LDR, so I have to pwm the indicator >> bulbs, to sync to the nimo brightness. >> >> >> [image: nimo-colon.jpeg] >> >> On Wednesday, April 5, 2023 at 3:46:38 AM UTC+2 Audrey wrote: >> >>> I have automated searches setup aswell but sometimes they just miss >>> things >>> >>> On Tue, Apr 4, 2023, 9:24 PM Mac Doktor <themac...@gmail.com> wrote: >>> >>>> >>>> On Apr 4, 2023, at 9:00 PM, Nicholas Stock <nick...@gmail.com> wrote: >>>> >>>> Looks like they all sold out though. >>>> >>>> >>>> He must have just gotten them. I've never seen them before and I have a >>>> search for "magic eye" that I check every day. I go through his stock >>>> periodically as well. >>>> >>>> >>>> Terry Bowman, KA4HJH >>>> "The Mac Doctor" >>>> >>>> https://www.astarcloseup.com >>>> >>>> “...the book said something astonishing, a very big thought. The stars, >>>> it said, were suns but very far away. The Sun was a star but close >>>> up.”—Carl Sagan, "The Backbone Of Night", *Cosmos*, 1980 >>>> >>>> >>>> -- >>>> 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+...@googlegroups.com. >>>> >>> To view this discussion on the web, visit >>>> https://groups.google.com/d/msgid/neonixie-l/6C443C41-DABE-4211-959C-EC9B706E12D5%40gmail.com >>>> <https://groups.google.com/d/msgid/neonixie-l/6C443C41-DABE-4211-959C-EC9B706E12D5%40gmail.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 neonixie-l+unsubscr...@googlegroups.com. > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/57c25674-1765-40c4-8fd0-4688ee0ee172n%40googlegroups.com > <https://groups.google.com/d/msgid/neonixie-l/57c25674-1765-40c4-8fd0-4688ee0ee172n%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 neonixie-l+unsubscr...@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/CAOX%2BRH%2BH%2BBj6Qef7oZs1F0iLVMU%3DjpNBX-2ymc2wZuOj4EthBg%40mail.gmail.com.
