Martin, thank you for your detailed explanation! That's clear to me now. Bartek.
czwartek, 28 października 2021 o 22:28:30 UTC+2 [email protected] napisał(a): > Aw that is quite a charming setup Peter > > On Thu, Oct 28, 2021, 4:27 PM peter bunge <[email protected]> wrote: > >> Would anyone care to sell me an end view Numitron (DTF104B) to add to my >> vintage digital working display? >> I would also like a DIP 7 segment incandescent display, or anything >> interesting not in the picture. Nothing too new. >> The LED Bargraph and Magic Eye react to ambient sound. >> [image: 20210803_093913.jpg] >> >> On Thu, Oct 28, 2021 at 1:41 PM Mark Moulding <[email protected]> wrote: >> >>> *Er, you're not the only one with a stash of these.... :)* >>> >>> I'm glad to hear that - it means that there will be other projects >>> showing up with them. One of the reasons I like Numitrons so much, besides >>> being incredibly easy to drive, is their longevity. At rated voltage >>> (which I don't actually know for these tubes, but expect to be around >>> 4.5V), they have a rated life of 100,000 hours, and that goes up rapidly to >>> infinity at slightly lower voltages. There's also no cathode poisoning or >>> other issues to worry about. This all means that I'm comfortable building >>> something with the last of an unobtanium part, knowing that it won't need >>> replacement in my lifetime. >>> ~~ >>> Mark Moulding >>> >>> On Wednesday, October 27, 2021 at 11:02:53 AM UTC-7 Pramanicin wrote: >>> >>>> Er, you're not the only one with a stash of these.... :) >>>> >>>> They are nice looking tubes... >>>> >>>> On Wed, Oct 27, 2021 at 10:50 AM Mark Moulding <[email protected]> wrote: >>>> >>>>> I have a pretty good sized collection of RCA DTF-104B Numitrons, which >>>>> I think are especially attractive - they're large digits, in a >>>>> flat-topped >>>>> end-view tube. They're quite rare now, and in fact I think I have most >>>>> of >>>>> the remaining world stock of these things (around 150 or so). Although >>>>> I've successfully used them in a couple of projects, I've never been able >>>>> to locate a data sheet for them - does anyone have any pointers for this >>>>> specific tube? >>>>> >>>>> Thanks! >>>>> ~~ >>>>> Mark Moulding >>>>> >>>>> [image: WoodClock (Small).JPG] >>>>> >>>>> On Tuesday, October 26, 2021 at 2:21:21 PM UTC-7 Dekatron42 wrote: >>>>> >>>>>> I knew I'd seen the number, and found them just now: >>>>>> http://www.tube-tester.com/sites/nixie/dat_arch/Numitron_RCA_01.pdf >>>>>> at the bottom of the page, they are development numbers for the DR2200 >>>>>> series. >>>>>> >>>>>> /Martin >>>>>> >>>>>> On Tuesday, 26 October 2021 at 22:21:47 UTC+2 Dekatron42 wrote: >>>>>> >>>>>>> Tubes designated DTF are development numbers used by Apollo/RCA - it >>>>>>> says so at the bottom of their datasheets. >>>>>>> >>>>>>> /Martin >>>>>>> >>>>>>> On Tuesday, 26 October 2021 at 21:43:52 UTC+2 Bartek Ogryz wrote: >>>>>>> >>>>>>>> Hi! >>>>>>>> They appeared on eBay last days: DTF137, DTF138, DTF140 (or maybe >>>>>>>> DTF/37, DTF/38, DTF/40). What are theese? Anyone has some more >>>>>>>> knowledge >>>>>>>> about them? >>>>>>>> >>>>>>>> Bartek. >>>>>>>> >>>>>>>> BTW: If someone is interested in numitrons, quite rare Apollo >>>>>>>> DA-2500 are hiding on eBay: item no 254866404573. Unfortunatelly, as >>>>>>>> the >>>>>>>> seller told me, all that have left, are without markings... >>>>>>>> >>>>>>> -- >>>>> 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/1baae699-e553-4f02-95f7-9b6b07cbee90n%40googlegroups.com >>>>> >>>>> <https://groups.google.com/d/msgid/neonixie-l/1baae699-e553-4f02-95f7-9b6b07cbee90n%40googlegroups.com?utm_medium=email&utm_source=footer> >>>>> . >>>>> >>>> -- >>> 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/297852cb-0da5-4396-9e67-f98fde319dfbn%40googlegroups.com >>> >>> <https://groups.google.com/d/msgid/neonixie-l/297852cb-0da5-4396-9e67-f98fde319dfbn%40googlegroups.com?utm_medium=email&utm_source=footer> >>> . >>> >> -- >> 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/CAFxqQo%2BJSdA9yFS9643rtwMG-iVhsT_%3DfU55uY26DVxUu1OvtQ%40mail.gmail.com >> >> <https://groups.google.com/d/msgid/neonixie-l/CAFxqQo%2BJSdA9yFS9643rtwMG-iVhsT_%3DfU55uY26DVxUu1OvtQ%40mail.gmail.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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