On Friday, 21 June 2013 11:35:13 UTC+1, Tidak Ada wrote: > Isn't it just the loss of hydrogen (helium) that makes the trouble? The > absolute pressure inside the tube is lower then outside, but the > *partial*tension of the hydrogen (helium) is higher than atmospheric as me is > told.... >
Whilst many fast dekatrons contain hydrogen (and some helium) I'm not sure the 6909 does - its glow is very orange, indicating a standard-ish Penning mixture with no hydrogen - also, I can find no documentation stating that this tube contains hydrogen - it is, however, a reasonable assumption that it *might* as its a "higher speed" (for a dekatron) tube... Hydrogen gives a pink-ish glow... not orange. The only real way to be sure would be to find a good 6909 and do a spectral analysis of its glow... I'm sure we have members who could do that... I'm still interested in the relative performance of extant Sylvania vs Rattheon tubes... 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/d8bd589a-62a7-46c5-a249-7755b6b04864%40googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
