You're all wrong, it's leaking gas through the pins. Sent from my iPhone
> On Jan 22, 2014, at 7:27 AM, Adam Jacobs <[email protected]> wrote: > > This is an issue that is most obvious on clocks with lots of functionality. > If there are different modes/menus that display numerals on a tube that are > not normally lit as part of the clock, then you'll see this. Best advice is > to take full advantage of automated cathode-poisoning prevention routines. > Clocks that don't have any menus, i.e. they don't ever display a numeral on > a tube that wouldn't be displayed as part of the standard clock, still have > this problem but it's not anywhere near as obvious. > For example: If the 10-minutes tube only ever displays 0-5 in the course of > being a clock and I don't have any additional menus or modes that might try > to display something besides those values, then the critical poisoning of 6-9 > doesn't matter to me. > > John is right. Try to repair the cathode poisoning if it is still fairly > mild. I've had great luck in the past doing this with IN-8-2's. [I learned > the hard way on some of my earliest clocks regarding current limiting > resistors. :S] > > -Adam > > On 1/22/2014 5:36 AM, John Rehwinkel wrote: >>> One of the IN-18s in my Nixichron has started to fail. I don't know if it's >>> cathode poisoning or some other failure mode. >>> In the 10's hours position, several of the digits are not lighting >>> completely, they are dark toward the bottom of the tube, probably the >>> bottom 1/3 of the numeral. >> Sounds like cathode poisoning. >> >>> This happened rather suddenly, or at least I only noticed it recently. The >>> "1" digit is fine, and that's what is lit most of the time. The other >>> digits only come into play during display of the GPS coordinates every 1/4 >>> hour. As they scroll across the clock, I can see the bad digits. >> Yeah, cathode poisoning happens when not all the digits are used enough. >> >>> I do have a couple spare tubes, but they have no hours on them. I'll try >>> one to be certain it's just the tube. But I'd actually like to find a used >>> tube, something with several years worth of use on it, so the brightness >>> will be a better match. >> It's worth trying to depoison that one. The easy way is to swap it with one >> of the other digits that gets used more evenly. The quick way is to run >> those other digits for a bit a higher-than-normal current until they light >> fully again. >> >> - John > > -- > 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/52DFE351.7030606%40gmail.com. > For more options, visit https://groups.google.com/groups/opt_out. -- 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/DCC680D3-8D1C-458F-99E5-0BE23298FD8E%40earthlink.net. For more options, visit https://groups.google.com/groups/opt_out.
