Hello! I use 30 torr pressure in my tubes, the gas is a mixture of 99.9% Ne + 0.1% Ar. Digits in my tubes are not so sharp as in original Z568M, I think they use 35-40 torr (higher pressure = thinner glow), I prefe a little bit more fuzzy look. The purpose of Ar here is to lower the striking voltage, anything from 0.01% to 1% will do the job. Mercury - I think in z568m tubes will be 2-3mg of Hg, I use 4mg (I have bigger envelope). IMHO, the actual amount of mercury needed is based on surface of the inner system parts like digits, anode cage, micas and so.. The amount of mercury vapours present in relatively high pressure of 30 torr is negligible. From what I read, the amount of mercury is not critical. From my experiments, when I tried higher amounts (8mg), the glow had strong and ugly blue-white haze.
Regards! Dalibor Farny Dne středa 14. ledna 2015 12:09:45 UTC+1 Nick napsal(a): > > What gas pressure is there in nixies? I suspect just a few Torr or approx > 1 kPa? > > And how much Hg was put in each tube - looking at Ar or Ar/He-filled > display tubes which use up to 200mg of Hg (but can be a metre or more > long), a pill of about 1 to 5 mg might be needed. > > Dalibor - what do you find best? Thoughts? > > Nick > -- 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/8d3cfa1d-ae2a-4751-bb11-0e99d15aa6be%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
