> IN-18`s have a 5000 hour life I think the general experience is that the rated lifetimes for the Soviet tubes are generally very conservative, particularly if they have mercury in them (which IN-18 does). You clock design has to be fair to them though - don't over-drive or under-drive them (too low and you risk cathode poisoning).
Just to give an example: the prototype of my IN-9 single digit clock has been running essentially 24/7/365 for over 3 years. IN-9 have a rated lifetime of 1000 hours, so we're over 180 x the rated life, with no visible detriment in performance. My design is particularly kind to the tubes, but even so... http://www.youtube.com/watch?v=mQ1567EFCY0 Cheers, Jon. -- 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 this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
