<https://lh3.googleusercontent.com/-dL0oVxCxZR8/VvrV8a6t39I/AAAAAAAAX_I/yt021tM2DlcJOBndm6AYxkB25g0jW1fPA/s1600/INS-1s.png>
I'm of the opinion that the dot marks the anode, not the cathode, like this drawing which is alleged to be for the INS-1: <https://lh3.googleusercontent.com/-4BghUFlzwNU/VvrUQ1yp-8I/AAAAAAAAX-8/mcKVy92V0a0wHFHMiX5wGzSd2mC5fBiYQ/s1600/INS-1.jpg> I'm not quite confident that it is, however. If you look at a regulator tube, such as an 0A3, you'll see that the largest surface makes up the cathode, and only a thin rod is used for the anode. The cathode after all, loses material during normal operation. If wire such that the cup, at the bottom is the anode, and the larger cylinder is the cathode, the sputtered material will come off the cathode and head towards the anode. This is away from the lens, so it should help keep it clear longer. Now this is all speculation. What would really be good, is if someone translated the known INS-1 datasheet: <https://lh3.googleusercontent.com/-dL0oVxCxZR8/VvrV8a6t39I/AAAAAAAAX_I/yt021tM2DlcJOBndm6AYxkB25g0jW1fPA/s1600/INS-1s.png> On Saturday, September 29, 2012 at 3:20:38 PM UTC-7, pwalnuts wrote: > > Hi! I've been using INS-1 nixie lamps for a while and they have always > ended up flickering after a while. I think i might be doing a couple of > things wrong. > > A) Polarity. They light up any which way you wire them. from the Datasheet > (link) <http://tubehobby.com/datasheets/ins1.pdf> i can't definitively > tell what is the anode and what is the cathode. I know the dot means > something, but what it does I don't know. (Picture of INS-1 > <http://f.cl.ly/items/2g0Z301L1c3f2y1R0n1e/Image%202012-09-29%20at%204.51.03%20PM.png>) > > I have tried wiring them either way and they still flicker... This is what > I think it should be > http://f.cl.ly/items/2u1p3x3V263X3e3M0s3o/Image%202012-09-29%20at%205.34.01%20PM.png, > > is this correct? > > B) Current. I have a 170 VDC power supply with a 221k Ohm current limiting > resistor. It has been been running at 0.55mA. > > > I'm now trying a higher current limiting resistor that brings the current > down to 0.45mA. Seems to be working, but I've had ones that worked before > and then they start flickering. Thanks for any help! > > > > -- 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 post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/0d231f1a-f188-46db-8deb-38ff9ac34283%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
