Hi Jeff, good to hear you are content with my suggestion. Two remarks: I bought at a time small 365nm transmission filter from a seller at either AliExpress or Banggood. That reduces the amount of visible light considerabele. Second, make that the UV flash only during a short period around the firing of the of the nixie segments. That will reduce the production of ozone considerable.
Cheers, eric Verstuurd vanaf mijn iPhone > Op 3 dec. 2023 om 08:09 heeft Jeff Walton <jwalton...@gmail.com> het volgende > geschreven: > > > I've done some testing with common 3mm UV LEDs that are in the 395nM range. > Running them at ~5mA provides a dim purple color light that when placed under > or in front of the tube actually makes the reliability of the ignition very > stable. Even in a fully darkened room, the segments and decimal points light > reliably. > > This particular tube (MG-17G) has segments with no anode screen in front of > the tube, so they seem to behave a little differently than a regular nixie. > I also found that if I placed fingers on the sides of the tubes while > operating, the segments lit more reliably. I think that I will go for an LED > under each tube but powered just enough to make the tubes work better and not > to try to supply any visible base lighting. I will try 365nM LED's when they > arrive and may use them if there is less noticeable, visible light. > > Thanks for the suggestions! > > Jeff > >> On Wednesday, November 29, 2023 at 8:43:48 PM UTC-6 Jeff Walton wrote: >> I've recently come across a situation where I have some tubes in a clock >> that are being directly driven and are having trouble starting when the room >> is darkened but light right up when a room light is turned on. These >> particular tubes were probably intended for use in a calculator. They are >> seven segment neon MG-17G tubes. Once the tubes have any of the segments >> lit, there is really no issue with the performance. It's when the tubes go >> completely dark if a space is used while scrolling a message or lighting a >> dash on and off to emulate a colon. I'm wondering if others have found any >> particular tricks to help convince tubes to light up. There is no >> "baselighting" and the HV is ~172v. I'm considering increasing the HV by >> 10-15v but don't want to over drive the tubes. Short of putting a >> radioactive source in the vicinity, are there other things that anyone has >> had any luck with? >> >> Jeff > > -- > 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/cfde3460-1737-4506-a58e-a1a6401ca7cen%40googlegroups.com. -- 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/76B02463-F412-4936-86F1-0B4F28A82AB2%40zeelandnet.nl.