Hello, thank you all for the info!
That Russian site seems to imply that they were only used in products sold by the same factory that made the lamps. If they were indeed "internal use only", it makes sense that they had no markings or that no datasheet for them can be found. The double designation IN-3V (ИН-3В) and IN-3B (ИН-3Б) sounds suspicious to me: perhaps someone at some point incorrectly transliterated ИН-3В to IN-3B, which was then transliterated back to ИН-3Б. Maybe? I did a little simulation <https://www.falstad.com/circuit/circuitjs.html?ctz=CQAgjCAMB0l3AWAnC1b0DYQFYG0tgEwYYDshkZBAHDlgMzaQ7PYCmAtGGAFD0IgAZgHcAJgCcA9gAcAOgEcY1SuHDRSYBI0LUwSHWHiFOpKCEL54V69QFhs2cDwBeIJGEIh6GWu8-1vcyExKTlFaGUMFzcPLx8YzwQ4IJEJGQUlSh5xBJAk5j88jAFmQgo4HgA3EF0sBGKasAZA5ggmL25oDwwkanpyCmUkM2YYbB5hRuasQoCsSAnc+oFaopKeAHMpte2EZRGeSSCG0uoyUxh4CEvIUluPW1JsDEg9h09SoPpD44FTTTmF0s12BqggYC68DIyGoZQQpAQYGoPCAA> and, assuming 155V voltage drop across the lamp, 220V RMS with a 22k resistor produces a current of slightly over 4mA RMS. In my experiments I was running the lamps at 1.5mA, so yeah, I was using way too little current. If I up the voltage to 230V RMS (what we have here in Italy, at least nominally), then increasing the resistor value to 24k yields the same RMS current. Next time I'll try this arrangement. Best regards, Andrea Il giorno giovedì 17 febbraio 2022 alle 03:14:35 UTC+1 LB ha scritto: > Those look like something someone made at home, or at least something that > could be made at home with the right setup. > > On Feb 16, 2022, at 5:22 PM, Mac Doktor <[email protected]> wrote: > > > > You beat me to it, Martin, but it's a good thing I was interrupted before > sending my reply. If nothing else these links saved me the trouble of > taking photos. 8D > > > On Feb 16, 2022, at 4:39 PM, Dekatron42 <[email protected]> wrote: > > This Russian website has a little information on them but even there they > are not sure of their manufacture and data - they are used in Christmas > lighting and also some photo lamps. > > > > *Martin, thank you *very much* for finding that site!!!* *_* > > I have two of those stars. One of my other hobbies is collecting old > Christmas lights and I have a number of Soviet "New Year's" (most > definitely not "Christmas") lighted decorations. I use a variac and a 1:2 > transformer to get 220V RMS. > > > On Feb 16, 2022, at 2:09 PM, Andrea Zambon <[email protected]> wrote: > > I just bought a few of these IN-3B lamps (not the regular IN-3, these are > much longer, see the pictures). > > > I've seen them referred to as both IN-3V (ИН-3В) and IN-3B (ИН-3Б) on eBay > but this Russian site is a gold mine of new info! 22kΩ it is. > > > The blue "haze" in the glass is a camera artifact. In person they have the > regular neon orange color. > > > My first thought is that the fill gas contains some mercury because the > blue glow is coming from the *glass* *itself*. I have a mercury spectral > lamp and when I first powered it up the glass fluoresced much brighter > (in the *visible* spectrum) than the ionized mercury. Perhaps the power > supply I had on hand was supplying too much current. If so, I only used it > for a brief time and hopefully no harm was done. > > > Also, digital imagers are sensitive to UV and direct exposure to a UV > source can appear as a bright magenta, meaning that UV is either passing > through the red filters in the Bayer matrix or that the filter material > itself is fluorescing. > > I need to do some research on that as it spoils my Halloween videos. I > have camcorders with both CCD and CMOS imagers and even with the exposure > greatly reduced a 15W "black light" fluorescent tube is so bright that the > blue and red pixels are fully saturated at 255. > > > Terry Bowman, KA4HJH > "The Mac Doctor" > > "If only you could see what I've seen with your eyes."—Roy Batty, *Blade > Runner* > > -- > 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/F9872A91-5A02-485C-8B8D-0720488D2AE4%40gmail.com > > <https://groups.google.com/d/msgid/neonixie-l/F9872A91-5A02-485C-8B8D-0720488D2AE4%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 [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/1cfb55d1-32ae-4938-835f-ef91e19ebc79n%40googlegroups.com.
