Thanks Jeff, I assume there isn't really anything that can be done to this then.
I could still use them for a clock I think as there isn't really anything wrong with them once they ionize. Michel On Sep 1, 8:14 am, Jeff Thomas <[email protected]> wrote: > Good question. > There are a few factors involved. Varying penning gas pressure/mix, process > variations in materials assembly and burn-in, and the possibility of > residual oxygen. We know that KR85, if introduced to assist in ionization > would be long gone. > > I've experienced the same in testing volumes of other nixie tubes over the > years, and I'd just chocked it up process variations when frit seal failure > couldn't be the cause. > > Regards, Jeff > > > > > > > > On Friday, August 31, 2012 2:47:37 PM UTC-7, Michel wrote: > > > After making a couple of batches of watches, I noticed that some tubes > > (about 1 out of 40) occasionally ionize very slowly when driven by a > > low current. This doesn't always happen, sometimes they ionize just as > > quick as other tubes, but occasionally it can take more than 1 second > > before the gas ionizes. Once they ionize, they look just as bright as > > the other tubes, there really is no difference. When I replace the > > slow tube with another one, the problem disappears. > > > Why is that? I was thinking could the pressure of the gas inside the > > tube be a bit too low after about 40 years not being used? But > > wouldn't that influence the brightness as well? > > > Michel -- 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]. For more options, visit https://groups.google.com/groups/opt_out.
