I considered using polytrons when I started the development of my Dekatron-based clock (shown here: https://www.youtube.com/watch?v=pK276xZWyo4 ) I was under the mistaken impression that the position of the glow couldn't be seen from the top of the polytron tube. Now after over a year of operation the zero cathode on the tens of hours is noticeably smaller. I don't know how much longer it will last. I'm going to re-wire the tens of hours tube so that every other cathode is zero, the others one. I'm hoping that the reset-to-zero circuit will still work when driving five cathodes instead of only one, and that the glow will move to one random "zero" cathode instead of all five. I wouldn't have had to worry about this if I'd used a polytron.
On Thursday, April 28, 2016 at 2:44:36 PM UTC-4, Dekatron42 wrote: > > Well, I couldn't keep myself away from the Polyatron so I made a quick > tweak of the pulse voltages as well as the screen/grid voltage, and voila > it started to run somewhat better - now I have to go and take care of what > I really should have done, household chores..... > > https://www.youtube.com/watch?v=lZQVZ4pPC4U > > /Martin > > On Thursday, 28 April 2016 18:20:00 UTC+2, Dekatron42 wrote: >> >> Hi, >> >> I've just uploaded a very short movie showing my first tries at running >> an early prototype of the A-201 Polyatron, and it shines a clear blue, just >> as the Russians have said all along. >> https://www.youtube.com/watch?v=cUjeha4Tmeo >> >> Unfortunately I have not tinkered too much with it so the driving >> conditions are not optimal, that's the reason for the short movie. I will >> spend some more time with it in the future to see if I can adjust the >> driving stage so it will run properly at higher speeds. Right now it looks >> like it is a simple adjustment of the screen/grid voltage. >> >> I've included a few photos here that show it from a few different angles. >> >> /Martin >> > -- 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/691f617d-8648-41b9-b6ec-79f8a0e54cc1%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
