On Friday, November 10, 2017 at 12:22:10 AM UTC, Phill Scanlon wrote: > > > To summarise. The only pins which MUST be identified are the Anode, the > Guide and/or Guides. > >
Well, all dekatrons do have at least one main cathode brought out to the base individually in addition to any commoned main cathodes and it is necessary to distinguish this one if you actually want to be able to count using the tube or know where the glow is. However if all you want to do is spin a tube continuously, then for most basic dekatron types I guess you're right. Identify the anode and guide(s), apply the appropriate inputs to those, ground the other pins as cathodes and it'll work. However the situation does get more complicated for tubes like GC10D, GS10H where some of the guide electrodes are brought out individually to the base. Get the hang of things on the basic tubes first and then you should find it easy to deal with the extra bells and whistles of those tubes. > My understanding of the dekatron is that the index or K0 pin is NOT > connected to any other pins. > The only reason I say this - as I have never taken one apart - is from > this gif file I have attached. > > Guessing that the gif is is over simplified. > > Correct ? > The GIF is spot on for a two-guide counter dekatron like GC10B or OG4. And yes, the index or K0 pin is not connected to anything else in that whole array of electrodes circling the anode, just the individual electrode as shown. Some manufacturers call this the 'output cathode'. In a selector dekatron like GS10C or A101, every one of those purple electrodes that are connected together in the GIF as K1-K9 (RTN) is not connected to anything else and brought out to its own pin on the base. In a computing counter like GC10/4B, some of those electrodes have their own pin on the base, the remainder are internally connected to make a common cathode array like in the GIF. Your OG8 is therefore different to the GIF in 2 ways. First K3, K5 and K9 don't connect internally to the common cathode line - they are just brought directly out to the base, exactly like K0 is shown here. Second, it has a single directional transfer electrode array instead of the two guide electrode arrays, so you need to imagine all the orange coloured pins and connections in the GIF as being absent. Jon. -- 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 neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/b60b249f-966a-49ec-8261-6d34adb5cce7%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
