Gosh, I totally missed that, sorry. I had opened the link but missed that it was about the 1370
Paul Andrews schrieb am Samstag, 25. November 2023 um 16:57:34 UTC+1: > Regarding ZM1370 - I literally posted a link to my photos of one earlier > in a reply to your initial post. > > On Nov 24, 2023, at 6:59 PM, Magnedyne <miro.s...@airgrips.de> wrote: > > Alright I’ve done some more research and it appears that this sign might > even more special than I previously thought. Some have claimed that > Telefunken never sold the ZM1360 and ZM1370 due to them turning out not > economically viable. The datasheet for the Varisymbol mentioned datasheets > for the ZM1360 and 70 being worked on. I have furthermore found no > documentation regarding the ZM1360 and ZM1370 ever being commercially sold. > Now of course a lack of documentation is in no way proof but I’ve also not > been able to find anyone, or even pictures for that manner, of these two > tube types. > > > If this were to be true I’d have pre production, or rather sample tubes as > production never happened. I’m very glad that none of these seemingly > nonexistent tubes are „defective“/have a coating. > > Terry S schrieb am Donnerstag, 16. November 2023 um 01:10:31 UTC+1: > >> I agree, don't change a wire! It's a piece of history as-is. Fix any >> defects and let it live as a tribute to the original designer. Who are you >> (or any of us) to second guess the designer? Could you update it with an >> Arduino and make it do back flips? Yes of course But should you? No. >> >> On Wednesday, November 15, 2023 at 6:36:09 AM UTC-6 Magnedyne wrote: >> >>> I'll probably leave it as is. I find the curiosity/historical aspect to >>> be more interesting and important than having something which has a use. >>> It's just like the homemade computerkits I collect, each tells their own >>> little story. Some are unfinished, who knows for what reason maybe >>> something got in the way, somebody lost motivation or something else >>> entirely. I wouldn't even think about finishing these kits just to have a >>> functional computer, it's more interesting this way. >>> Yes I'm certain the tubes are not socketed. The baseplate has holes >>> drilled in it which the leads poke through. The unused leads have been bent >>> to the side so that the tube stays in place. I'm uncertain if glue has been >>> used. The wires are soldered to the pins directly. >>> For now I'll keep it running for some time, like Terry suggested, maybe >>> the tubes will come back on their own but I certainly doubt it. >>> Alex schrieb am Mittwoch, 15. November 2023 um 09:48:07 UTC+1: >>> >>>> Nice Find. >>>> >>>> Looking at those pics it seems clear to my eye that this has cathode >>>> resistors rather than anode, one for each used cathode. These will then >>>> likely be in three groups, Telefunken only, Varisign only and common to >>>> both. This then yields one anode wire to all (red wire?) >>>> And three cathode wires (three blacks). It does look like they have >>>> only put tails on used cathodes. >>>> Circuit is likely a simple astable / flip flop with a pair of big >>>> transistors for switching the cathodes, maybe with a variable amount of >>>> capacitance on its base for the fade effect? >>>> >>>> I would suggest an apprentice build back then, maybe the mechanics are >>>> nice but I would say the electronics are fairly hum-drum. >>>> >>>> My approach with this would be to remove the resistor strips, add >>>> missing cathode wires, make up some ruler like PCBs with serial HV latches >>>> on and replace the main veroboard with a PCB with your favourite micro / >>>> embedded solution. This can take in / use the original switches and >>>> transformer so with the back on it would look the same. You can then keep >>>> the bits removed for archive or if there is enough space, mount new bits >>>> on >>>> top as a mezzanine. Depends on your goals really, but as is it's more of a >>>> curio / collector asset only really... >>>> >>>> It would blow their minds back then to have scrolling dynamically >>>> updated text, and would make use of all the segments (assuming those have >>>> not been poisoned to oblivion with deposits). >>>> >>>> For your current segment poisoning, you could parallel another fairly >>>> high R resistor across the existing ones for that tube to up the drive. >>>> Certainly no multiplexing going on here! >>>> >>>> Are you certain they are not socketed? Looks odd with the wires >>>> disappearing into the material like that. >>>> >>>> Best of luck! >>>> >>>> - Alex >>>> On Wednesday, 15 November 2023 at 07:34:47 UTC Magnedyne wrote: >>>> >>>>> [image: IMG_0035.jpeg] >>>>> >>>>> -- > You received this message because you are subscribed to a topic in the > Google Groups "neonixie-l" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/neonixie-l/8YTUwZ7OvAM/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > neonixie-l+...@googlegroups.com. > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/51f5301e-4a18-462c-9708-46475964f58dn%40googlegroups.com > > <https://groups.google.com/d/msgid/neonixie-l/51f5301e-4a18-462c-9708-46475964f58dn%40googlegroups.com?utm_medium=email&utm_source=footer> > . > > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. 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