Just received a DGL-Pressler N3, very low speed (25 kHz) dekatron. Was quite expensive, so I hope it will work. Anyhow it is neon filled, so if well manufactured it will not be outgassed. Never saw a photo of video of it while working, so an challenge.
I know all tubes filled with hydrogen and helium (mixtures) are prone to outgassing, because glass is permeable to these gasses. Even hydrogen thyratrons, however they contain a kind of buffer getter to keep the hydrogen pressure for a longer time ant the necessary level. eric -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Jon Sent: zaterdag 17 maart 2012 23:07 To: neonixie-l Subject: [neonixie-l] Re: Dud Dekatron Query On Mar 17, 5:43 pm, threeneurons <[email protected]> wrote: > I'm wondering what type of dud dekatrons others have run into. > Primarily interested in Russian types. > > In general its been found that the high speed (non-neon) dekatrons > have a very high dud rate. My experience is broadly similar. OG3, OG7, OG8, GC10D and GS10D are all somewhere between 50% and 75% dead rates. The 6909 and 6910 are similar, probably towards the top end of that range. The Elesta tubes also have an appreciable number of duds, but not as many. The worst one of all in my book is the high-speed Mullard Z505S - I have one working example and lots of dead ones. Well I hope the working one is still OK - it's been a few months since I checked... At the other end of the spectrum, the ETL low-speed neon dekatrons are as tough as old boots. Don't think I've ever seen a dead one, other than due to mechanical trauma. 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. -- 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.
