Ah! I have been following your channel for some time, and just made the connection today that you are active on the Google group as well! I was very excited for you when I saw the box of NIMOs!
On Monday, October 5, 2020 at 10:42:41 AM UTC-4 astroschmidt wrote: > Hi Martin, > > here´s another YouTube video where I unbox the Ebay-auction package (if > you haven´t already found it): > https://youtu.be/7Mprac_anEA > > If I find the time I will scan the documents that were included in the > Ebay-auction and share them here. > . > The five tube mounting bracket is ATM under use in the prototype. > I will take photos of the bracket and the bezel, when I am ready with the > clock enclosure. > > Best regards > Roger > > Dekatron42 schrieb am Montag, 5. Oktober 2020 um 14:33:00 UTC+2: > >> Would it be possible for you to share the circuit diagrams that you got >> in the box with the tubes, I haven't seen some of them, just the datasheet. >> >> Also, can you share some photos of the mechanical pieces in the package, >> like photos of the five tube mounting bracket and of the power supply (saw >> some photos in the video)? >> >> /Martin >> >> On Monday, 5 October 2020 14:09:07 UTC+2, astroschmidt wrote: >>> >>> Hi Jörg, >>> >>> as I lately got 10 NIMOs in an Ebay auction and am currently also >>> working on a 6 tube NIMO-clock I can sell you a tube from my spares. >>> YouTube NIMO-Clock Update#2 <https://youtu.be/JA1oeqavMg8> >>> YouTube NIMO-Clock Update#1 <https://youtu.be/cGmHSJMAjvk> >>> >>> Please PM me. >>> Roger >>> jörg schrieb am Sonntag, 4. Oktober 2020 um 15:09:46 UTC+2: >>> >>>> So, if there is someone in the group, who is willing to sell a nimo >>>> which might join the other five, pls. pm me. >>>> >>>> jörg schrieb am Sonntag, 4. Oktober 2020 um 14:57:19 UTC+2: >>>> >>>>> Martin, you are right. >>>>> I've checked the getter flash and it is gone. Only a white shadow left. >>>>> So, sadly, the tube has sucked air and is cracked somewhere at the >>>>> pins. >>>>> Unfortunately, I don't have a plasma ball. >>>>> >>>>> Dekatron42 schrieb am Sonntag, 4. Oktober 2020 um 01:20:23 UTC+2: >>>>> >>>>>> Have you got a Plasma ball to hold it to? If air has entered in you >>>>>> might see a very faint blueish glow if you turn off the surrounding >>>>>> light. >>>>>> >>>>>> What does the getter flash look like, like a mirror or is it gone >>>>>> completely, or has it gone white? >>>>>> >>>>>> I have seen a few Nixies where the Anode wire has come lose at a >>>>>> welding spot, can you see if something similar has happened to your Nimo >>>>>> with any of the wires or the Anode connection - if so you might smack it >>>>>> gently against your palm to see if the wire reconnects enough for it to >>>>>> work again? >>>>>> >>>>>> /Martin >>>>>> >>>>>> On Saturday, 3 October 2020 23:35:35 UTC+2, jörg wrote: >>>>>>> >>>>>>> Hi Gregebert, yes, I've checked the tube several times. The cold >>>>>>> resistance is about 2,1 ohm, which is identical to the other tubes. >>>>>>> Just swapped the tube with a running one on the same driver board. >>>>>>> Sadly, no function at all. Under a microscope, no crack is visible. >>>>>>> >>>>>>> I've made a short video to show the difference between a neon-nixie >>>>>>> and a nimo crt-tube and a neodym magnet (very small one.) >>>>>>> https://www.youtube.com/watch?v=JJytnrvTy3Q >>>>>>> >>>>>>> gregebert schrieb am Freitag, 2. Oktober 2020 um 19:25:40 UTC+2: >>>>>>> >>>>>>>> Jorg - Regarding the dead tube, have you compared the filament >>>>>>>> resistance of the bad tube to the others ? >>>>>>>> >>>>>>>> NIMO tubes have 2 parallel filaments, so if one is open, the >>>>>>>> resistance will be TWICE the value of a good tube. >>>>>>>> I think the cold resistance is around 3 ohms. >>>>>>>> >>>>>>>> If 1 filament is out, you can still get 5 numerals to work. >>>>>>>> >>>>>>>> I would be surprised if both filaments are burned-out, unless >>>>>>>> someone put way too much voltage on it, or the tube is cracked around >>>>>>>> the >>>>>>>> pins. >>>>>>>> >>>>>>>> If the filaments are OK, power-up the tube and make sure you get >>>>>>>> around 180mA of current. >>>>>>>> Then try varying the voltage between the filament and the logic >>>>>>>> driving the grids. If a grid is about 6 V more positive than the >>>>>>>> filament, >>>>>>>> you should get a numeral to turn on. >>>>>>>> >>>>>>>> On Thursday, October 1, 2020 at 1:44:20 PM UTC-7 jörg wrote: >>>>>>>> >>>>>>>>> Short update of my nimo project. >>>>>>>>> I've got 5 tubes running. The sixt is unfortunately DOA. >>>>>>>>> The tubes filaments are driven with three power supplies, with >>>>>>>>> soft start IC (load switch). >>>>>>>>> So the filament gets started very smooth. >>>>>>>>> I've made some experiments with multiplexing the tubes. >>>>>>>>> Which work nice, using the method described in the manual. The >>>>>>>>> bias voltage is changed for every tube, that should be on/off. >>>>>>>>> In the actual approch, I'm using direct driving the tubes via >>>>>>>>> 74HC595 shift registers. Got a plenty of problems at the beginning. >>>>>>>>> The power and signal lines for the 595 were messed with switching >>>>>>>>> noise. Some caps did the trick. >>>>>>>>> Really nice to view the working tubes. >>>>>>>>> >>>>>>>>> Video: https://www.youtube.com/watch?v=JbwfZhYhnlo >>>>>>>>> >>>>>>>>> jörg schrieb am Mittwoch, 15. Juli 2020 um 18:01:18 UTC+2: >>>>>>>>> >>>>>>>>>> I‘m using Eagle to layout. >>>>>>>>>> It takes time for me to feel comfortable with it. >>>>>>>>>> And Fusion360. >>>>>>>>>> >>>>>>>>>> -- 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 view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/07cfa3ae-170a-4795-be85-3c3ee14574cdn%40googlegroups.com.
