Does it stick on the same pin if you run it both directions? I usually run them backwards (counter clockwise) as they have mostly been running clockwise. If I get a dekatron that is hard to get to run I sometimes use the guide electrodes as the cathode and the true cathode that is sticking as an anode and let it sit with just enough voltage/current to start the glow for some time, usually not more than a few minutes, leaving the true anode without any connection. Sometimes you can get a good glow and sometimes not, but it has had enough effect on some dekatrons to remove enough of the material that is making it stick. On some dekatrons there are also deposits sputtered onto the ceramic base which surrounds the pins which make it much harder to regenerate them into a working condition as there is no electrode connected there, sometimes dekatrons that have this "tarnish" will work for a while after being regenerated and then stop again. /Martin
On Tuesday, October 16, 2012 1:36:17 AM UTC+2, threeneurons wrote: > I just got a 6909 hi-speed dekatron in the mail, today. I hate hi-speeds, > but it was a trade, for a standard speed 6802, so the other guy's spinner > would work. But this one is a strange one. My other 6909s and 6910s, have > this almost indescribably hideous pinkish/yellowish glow. This one glows > almost orange. Not 6802 or GC10B neon orange, but the color of a Japanese > DK23 dekatron, with the hint of blue. That's not a problem, because I can > look at the lit tube, now, without cringing. > > Well it has a strange operational problem. When I stick in my spinner kit > spinner, it runs upto a certain cathode, then stops. This is at the preset > current ~350uA. If I raise it to ~1mA, the high speeds normal run current, > nothing changes. I move it over to my dekatron pendulum jig, and it runs > fine, but only at the lower current (~350uA). If I raise it to within its > specified operating range, it stalls, at that very same cathode. > > For now, I'll let it burn-in 24/7 for a few days, at that lower current, > and see if it clears up. Will report back later, if anything changes. > > Plus, I still have to check the issues with those two 6879 dekatrons, I > got a few weeks ago, when time permits. > > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to [email protected]. To unsubscribe from this group, send email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msg/neonixie-l/-/ghDU3Gx8Q9sJ. For more options, visit https://groups.google.com/groups/opt_out.
