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 [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/cb0baf5f-3838-463b-8329-5a11003a7fd5n%40googlegroups.com.
